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Check-in [5b44a419]
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Overview
Comment:initial mass-change merge of main repo with my fork.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | json
Files: files | file ages | folders
SHA1: 5b44a419cdf6be06632176bedacf42591e0fbfae
User & Date: stephan 2011-09-15 12:03:20
Context
2011-09-16
11:48
compile fix for mingw (thanks to Robert Engelhardt). check-in: 58d41564 user: stephan tags: json
2011-09-15
12:03
initial mass-change merge of main repo with my fork. check-in: 5b44a419 user: stephan tags: json
11:55
merged in with trunk for clean state before i pull in my fork. check-in: 716bb292 user: stephan tags: json
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Changes to src/blob.c.

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        if( z[i]=='"' ) z[i] = '_';
      }
      return;
    }
  }
  blob_append(pBlob, zIn, -1);
}


































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        if( z[i]=='"' ) z[i] = '_';
      }
      return;
    }
  }
  blob_append(pBlob, zIn, -1);
}

/*
** A read(2)-like impl for the Blob class. Reads (copies) up to nLen
** bytes from pIn, starting at position pIn->iCursor, and copies them
** to pDest (which must be valid memory at least nLen bytes long).
**
** Returns the number of bytes read/copied, which may be less than
** nLen (if end-of-blob is encountered).
**
** Updates pIn's cursor.
** 
** Returns 0 if pIn contains no data.
*/
unsigned int blob_read(Blob *pIn, void * pDest, unsigned int nLen ){
  if( !pIn->aData || (pIn->iCursor >= pIn->nUsed) ){
    return 0;
  } else if( (pIn->iCursor + nLen) > (unsigned int)pIn->nUsed ){
    nLen = (unsigned int) (pIn->nUsed - pIn->iCursor);
  }
  assert( pIn->nUsed > pIn->iCursor );
  assert( (pIn->iCursor+nLen)  <= pIn->nUsed );
  if( nLen ){
    memcpy( pDest, pIn->aData, nLen );
    pIn->iCursor += nLen;
  }
  return nLen;
}

Changes to src/captcha.c.

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  sqlite3_randomness(sizeof(x), &x);
  x &= 0x7fffffff;
  return x;
}

/*
** Translate a captcha seed value into the captcha password string.


*/
char *captcha_decode(unsigned int seed){
  const char *zSecret;
  const char *z;
  Blob b;
  static char zRes[20];

  zSecret = db_get("captcha-secret", 0);
  if( zSecret==0 ){







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  sqlite3_randomness(sizeof(x), &x);
  x &= 0x7fffffff;
  return x;
}

/*
** Translate a captcha seed value into the captcha password string.
** The returned string is static and overwritten on each call to
** this function.
*/
char const *captcha_decode(unsigned int seed){
  const char *zSecret;
  const char *z;
  Blob b;
  static char zRes[20];

  zSecret = db_get("captcha-secret", 0);
  if( zSecret==0 ){

Changes to src/cgi.c.

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  }

  z = (char*)P("REMOTE_ADDR");
  if( z ) g.zIpAddr = mprintf("%s", z);

  len = atoi(PD("CONTENT_LENGTH", "0"));
  g.zContentType = zType = P("CONTENT_TYPE");
  if( len>0 && zType ){
    blob_zero(&g.cgiIn);
    if( fossil_strcmp(zType,"application/x-www-form-urlencoded")==0 
         || strncmp(zType,"multipart/form-data",19)==0 ){
      z = fossil_malloc( len+1 );
      len = fread(z, 1, len, g.httpIn);
      z[len] = 0;
      if( zType[0]=='a' ){
................................................................................
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
      blob_uncompress(&g.cgiIn, &g.cgiIn);
    }else if( fossil_strcmp(zType, "application/x-fossil-debug")==0 ){
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
    }else if( fossil_strcmp(zType, "application/x-fossil-uncompressed")==0 ){
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
    }



  }

  z = (char*)P("HTTP_COOKIE");
  if( z ){
    z = mprintf("%s",z);
    add_param_list(z, ';');
  }







|







 







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  }

  z = (char*)P("REMOTE_ADDR");
  if( z ) g.zIpAddr = mprintf("%s", z);

  len = atoi(PD("CONTENT_LENGTH", "0"));
  g.zContentType = zType = P("CONTENT_TYPE");
  if( !g.json.isJsonMode && (len>0 && zType) ){/* in JSON mode this is delegated to the cson_cgi API.*/
    blob_zero(&g.cgiIn);
    if( fossil_strcmp(zType,"application/x-www-form-urlencoded")==0 
         || strncmp(zType,"multipart/form-data",19)==0 ){
      z = fossil_malloc( len+1 );
      len = fread(z, 1, len, g.httpIn);
      z[len] = 0;
      if( zType[0]=='a' ){
................................................................................
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
      blob_uncompress(&g.cgiIn, &g.cgiIn);
    }else if( fossil_strcmp(zType, "application/x-fossil-debug")==0 ){
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
    }else if( fossil_strcmp(zType, "application/x-fossil-uncompressed")==0 ){
      blob_read_from_channel(&g.cgiIn, g.httpIn, len);
    }
    /* FIXME: treat application/json and text/plain as unencoded
       JSON data.
    */
  }

  z = (char*)P("HTTP_COOKIE");
  if( z ){
    z = mprintf("%s",z);
    add_param_list(z, ';');
  }

Added src/cson_amalgamation.c.















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/* auto-generated! Do not edit! */
#include "cson_amalgamation.h"
/* begin file parser/JSON_parser.h */
/* See JSON_parser.c for copyright information and licensing. */

#ifndef JSON_PARSER_H
#define JSON_PARSER_H

/* JSON_parser.h */


#include <stddef.h>

/* Windows DLL stuff */
#ifdef JSON_PARSER_DLL
#   ifdef _MSC_VER
#	    ifdef JSON_PARSER_DLL_EXPORTS
#		    define JSON_PARSER_DLL_API __declspec(dllexport)
#	    else
#		    define JSON_PARSER_DLL_API __declspec(dllimport)
#       endif
#   else
#	    define JSON_PARSER_DLL_API 
#   endif
#else
#	define JSON_PARSER_DLL_API 
#endif

/* Determine the integer type use to parse non-floating point numbers */
#if __STDC_VERSION__ >= 199901L || HAVE_LONG_LONG == 1
typedef long long JSON_int_t;
#define JSON_PARSER_INTEGER_SSCANF_TOKEN "%lld"
#define JSON_PARSER_INTEGER_SPRINTF_TOKEN "%lld"
#else 
typedef long JSON_int_t;
#define JSON_PARSER_INTEGER_SSCANF_TOKEN "%ld"
#define JSON_PARSER_INTEGER_SPRINTF_TOKEN "%ld"
#endif


#ifdef __cplusplus
extern "C" {
#endif 

typedef enum 
{
    JSON_E_NONE = 0,
    JSON_E_INVALID_CHAR,
    JSON_E_INVALID_KEYWORD,
    JSON_E_INVALID_ESCAPE_SEQUENCE,
    JSON_E_INVALID_UNICODE_SEQUENCE,
    JSON_E_INVALID_NUMBER,
    JSON_E_NESTING_DEPTH_REACHED,
    JSON_E_UNBALANCED_COLLECTION,
    JSON_E_EXPECTED_KEY,
    JSON_E_EXPECTED_COLON,
    JSON_E_OUT_OF_MEMORY
} JSON_error;

typedef enum 
{
    JSON_T_NONE = 0,
    JSON_T_ARRAY_BEGIN,
    JSON_T_ARRAY_END,
    JSON_T_OBJECT_BEGIN,
    JSON_T_OBJECT_END,
    JSON_T_INTEGER,
    JSON_T_FLOAT,
    JSON_T_NULL,
    JSON_T_TRUE,
    JSON_T_FALSE,
    JSON_T_STRING,
    JSON_T_KEY,
    JSON_T_MAX
} JSON_type;

typedef struct JSON_value_struct {
    union {
        JSON_int_t integer_value;
        
        double float_value;
        
        struct {
            const char* value;
            size_t length;
        } str;
    } vu;
} JSON_value;

typedef struct JSON_parser_struct* JSON_parser;

/*! \brief JSON parser callback 

    \param ctx The pointer passed to new_JSON_parser.
    \param type An element of JSON_type but not JSON_T_NONE.    
    \param value A representation of the parsed value. This parameter is NULL for
        JSON_T_ARRAY_BEGIN, JSON_T_ARRAY_END, JSON_T_OBJECT_BEGIN, JSON_T_OBJECT_END,
        JSON_T_NULL, JSON_T_TRUE, and JSON_T_FALSE. String values are always returned
        as zero-terminated C strings.

    \return Non-zero if parsing should continue, else zero.
*/    
typedef int (*JSON_parser_callback)(void* ctx, int type, const struct JSON_value_struct* value);


/**
   A typedef for allocator functions semantically compatible with malloc().
*/
typedef void* (*JSON_malloc_t)(size_t n);
/**
   A typedef for deallocator functions semantically compatible with free().
*/
typedef void (*JSON_free_t)(void* mem);

/*! \brief The structure used to configure a JSON parser object 
*/
typedef struct {
    /** Pointer to a callback, called when the parser has something to tell
        the user. This parameter may be NULL. In this case the input is
        merely checked for validity.
    */
    JSON_parser_callback    callback;
    /**
       Callback context - client-specified data to pass to the
       callback function. This parameter may be NULL.
    */
    void*                   callback_ctx;
    /** Specifies the levels of nested JSON to allow. Negative numbers yield unlimited nesting.
        If negative, the parser can parse arbitrary levels of JSON, otherwise
        the depth is the limit.
    */
    int                     depth;
    /**
       To allow C style comments in JSON, set to non-zero.
    */
    int                     allow_comments;
    /**
       To decode floating point numbers manually set this parameter to
       non-zero.
    */
    int                     handle_floats_manually;
    /**
       The memory allocation routine, which must be semantically
       compatible with malloc(3). If set to NULL, malloc(3) is used.

       If this is set to a non-NULL value then the 'free' member MUST be
       set to the proper deallocation counterpart for this function.
       Failure to do so results in undefined behaviour at deallocation
       time.
    */
    JSON_malloc_t       malloc;
    /**
       The memory deallocation routine, which must be semantically
       compatible with free(3). If set to NULL, free(3) is used.

       If this is set to a non-NULL value then the 'alloc' member MUST be
       set to the proper allocation counterpart for this function.
       Failure to do so results in undefined behaviour at deallocation
       time.
    */
    JSON_free_t         free;
} JSON_config;

/*! \brief Initializes the JSON parser configuration structure to default values.

    The default configuration is
    - 127 levels of nested JSON (depends on JSON_PARSER_STACK_SIZE, see json_parser.c)
    - no parsing, just checking for JSON syntax
    - no comments
    - Uses realloc() for memory de/allocation.

    \param config. Used to configure the parser.
*/
JSON_PARSER_DLL_API void init_JSON_config(JSON_config * config);

/*! \brief Create a JSON parser object 

    \param config. Used to configure the parser. Set to NULL to use
        the default configuration. See init_JSON_config.  Its contents are
        copied by this function, so it need not outlive the returned
        object.
    
    \return The parser object, which is owned by the caller and must eventually
    be freed by calling delete_JSON_parser().
*/
JSON_PARSER_DLL_API JSON_parser new_JSON_parser(JSON_config const* config);

/*! \brief Destroy a previously created JSON parser object. */
JSON_PARSER_DLL_API void delete_JSON_parser(JSON_parser jc);

/*! \brief Parse a character.

    \return Non-zero, if all characters passed to this function are part of are valid JSON.
*/
JSON_PARSER_DLL_API int JSON_parser_char(JSON_parser jc, int next_char);

/*! \brief Finalize parsing.

    Call this method once after all input characters have been consumed.
    
    \return Non-zero, if all parsed characters are valid JSON, zero otherwise.
*/
JSON_PARSER_DLL_API int JSON_parser_done(JSON_parser jc);

/*! \brief Determine if a given string is valid JSON white space 

    \return Non-zero if the string is valid, zero otherwise.
*/
JSON_PARSER_DLL_API int JSON_parser_is_legal_white_space_string(const char* s);

/*! \brief Gets the last error that occurred during the use of JSON_parser.

    \return A value from the JSON_error enum.
*/
JSON_PARSER_DLL_API int JSON_parser_get_last_error(JSON_parser jc);

/*! \brief Re-sets the parser to prepare it for another parse run.

    \return True (non-zero) on success, 0 on error (e.g. !jc).
*/
JSON_PARSER_DLL_API int JSON_parser_reset(JSON_parser jc);


#ifdef __cplusplus
}
#endif 
    

#endif /* JSON_PARSER_H */
/* end file parser/JSON_parser.h */
/* begin file parser/JSON_parser.c */
/*
Copyright (c) 2005 JSON.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

The Software shall be used for Good, not Evil.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

/*
    Callbacks, comments, Unicode handling by Jean Gressmann (jean@0x42.de), 2007-2010.
    
    
    Changelog:
        2010-11-25
            Support for custom memory allocation (sgbeal@googlemail.com).
                        
        2010-05-07
            Added error handling for memory allocation failure (sgbeal@googlemail.com). 
            Added diagnosis errors for invalid JSON.
            
        2010-03-25
            Fixed buffer overrun in grow_parse_buffer & cleaned up code.
            
        2009-10-19
            Replaced long double in JSON_value_struct with double after reports 
            of strtold being broken on some platforms (charles@transmissionbt.com).
            
        2009-05-17 
            Incorporated benrudiak@googlemail.com fix for UTF16 decoding.
            
        2009-05-14 
            Fixed float parsing bug related to a locale being set that didn't
            use '.' as decimal point character (charles@transmissionbt.com).
            
        2008-10-14 
            Renamed states.IN to states.IT to avoid name clash which IN macro
            defined in windef.h (alexey.pelykh@gmail.com)
            
        2008-07-19 
            Removed some duplicate code & debugging variable (charles@transmissionbt.com)
        
        2008-05-28 
            Made JSON_value structure ansi C compliant. This bug was report by 
            trisk@acm.jhu.edu
        
        2008-05-20 
            Fixed bug reported by charles@transmissionbt.com where the switching 
            from static to dynamic parse buffer did not copy the static parse 
            buffer's content.
*/



#include <assert.h>
#include <ctype.h>
#include <float.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>


#ifdef _MSC_VER
#   if _MSC_VER >= 1400 /* Visual Studio 2005 and up */
#      pragma warning(disable:4996) /* unsecure sscanf */
#      pragma warning(disable:4127) /* conditional expression is constant */
#   endif
#endif


#define true  1
#define false 0
#define __   -1     /* the universal error code */

/* values chosen so that the object size is approx equal to one page (4K) */
#ifndef JSON_PARSER_STACK_SIZE
#   define JSON_PARSER_STACK_SIZE 128
#endif

#ifndef JSON_PARSER_PARSE_BUFFER_SIZE
#   define JSON_PARSER_PARSE_BUFFER_SIZE 3500
#endif

typedef void* (*JSON_debug_malloc_t)(size_t bytes, const char* reason);

#ifdef JSON_PARSER_DEBUG_MALLOC
#   define JSON_parser_malloc(func, bytes, reason) ((JSON_debug_malloc_t)func)(bytes, reason)
#else
#   define JSON_parser_malloc(func, bytes, reason) func(bytes)
#endif

typedef unsigned short UTF16;

struct JSON_parser_struct {
    JSON_parser_callback callback;
    void* ctx;
    signed char state, before_comment_state, type, escaped, comment, allow_comments, handle_floats_manually, error;
    char decimal_point;
    UTF16 utf16_high_surrogate;
    int current_char;
    int depth;
    int top;
    int stack_capacity;
    signed char* stack;
    char* parse_buffer;
    size_t parse_buffer_capacity;
    size_t parse_buffer_count;
    signed char static_stack[JSON_PARSER_STACK_SIZE];
    char static_parse_buffer[JSON_PARSER_PARSE_BUFFER_SIZE];
    JSON_malloc_t malloc;
    JSON_free_t free;
};

#define COUNTOF(x) (sizeof(x)/sizeof(x[0])) 

/*
    Characters are mapped into these character classes. This allows for
    a significant reduction in the size of the state transition table.
*/



enum classes {
    C_SPACE,  /* space */
    C_WHITE,  /* other whitespace */
    C_LCURB,  /* {  */
    C_RCURB,  /* } */
    C_LSQRB,  /* [ */
    C_RSQRB,  /* ] */
    C_COLON,  /* : */
    C_COMMA,  /* , */
    C_QUOTE,  /* " */
    C_BACKS,  /* \ */
    C_SLASH,  /* / */
    C_PLUS,   /* + */
    C_MINUS,  /* - */
    C_POINT,  /* . */
    C_ZERO ,  /* 0 */
    C_DIGIT,  /* 123456789 */
    C_LOW_A,  /* a */
    C_LOW_B,  /* b */
    C_LOW_C,  /* c */
    C_LOW_D,  /* d */
    C_LOW_E,  /* e */
    C_LOW_F,  /* f */
    C_LOW_L,  /* l */
    C_LOW_N,  /* n */
    C_LOW_R,  /* r */
    C_LOW_S,  /* s */
    C_LOW_T,  /* t */
    C_LOW_U,  /* u */
    C_ABCDF,  /* ABCDF */
    C_E,      /* E */
    C_ETC,    /* everything else */
    C_STAR,   /* * */   
    NR_CLASSES
};

static const signed char ascii_class[128] = {
/*
    This array maps the 128 ASCII characters into character classes.
    The remaining Unicode characters should be mapped to C_ETC.
    Non-whitespace control characters are errors.
*/
    __,      __,      __,      __,      __,      __,      __,      __,
    __,      C_WHITE, C_WHITE, __,      __,      C_WHITE, __,      __,
    __,      __,      __,      __,      __,      __,      __,      __,
    __,      __,      __,      __,      __,      __,      __,      __,

    C_SPACE, C_ETC,   C_QUOTE, C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,
    C_ETC,   C_ETC,   C_STAR,   C_PLUS,  C_COMMA, C_MINUS, C_POINT, C_SLASH,
    C_ZERO,  C_DIGIT, C_DIGIT, C_DIGIT, C_DIGIT, C_DIGIT, C_DIGIT, C_DIGIT,
    C_DIGIT, C_DIGIT, C_COLON, C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,

    C_ETC,   C_ABCDF, C_ABCDF, C_ABCDF, C_ABCDF, C_E,     C_ABCDF, C_ETC,
    C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,
    C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_ETC,
    C_ETC,   C_ETC,   C_ETC,   C_LSQRB, C_BACKS, C_RSQRB, C_ETC,   C_ETC,

    C_ETC,   C_LOW_A, C_LOW_B, C_LOW_C, C_LOW_D, C_LOW_E, C_LOW_F, C_ETC,
    C_ETC,   C_ETC,   C_ETC,   C_ETC,   C_LOW_L, C_ETC,   C_LOW_N, C_ETC,
    C_ETC,   C_ETC,   C_LOW_R, C_LOW_S, C_LOW_T, C_LOW_U, C_ETC,   C_ETC,
    C_ETC,   C_ETC,   C_ETC,   C_LCURB, C_ETC,   C_RCURB, C_ETC,   C_ETC
};


/*
    The state codes.
*/
enum states {
    GO,  /* start    */
    OK,  /* ok       */
    OB,  /* object   */
    KE,  /* key      */
    CO,  /* colon    */
    VA,  /* value    */
    AR,  /* array    */
    ST,  /* string   */
    ES,  /* escape   */
    U1,  /* u1       */
    U2,  /* u2       */
    U3,  /* u3       */
    U4,  /* u4       */
    MI,  /* minus    */
    ZE,  /* zero     */
    IT,  /* integer  */
    FR,  /* fraction */
    E1,  /* e        */
    E2,  /* ex       */
    E3,  /* exp      */
    T1,  /* tr       */
    T2,  /* tru      */
    T3,  /* true     */
    F1,  /* fa       */
    F2,  /* fal      */
    F3,  /* fals     */
    F4,  /* false    */
    N1,  /* nu       */
    N2,  /* nul      */
    N3,  /* null     */
    C1,  /* /        */
    C2,  /* / *     */
    C3,  /* *        */
    FX,  /* *.* *eE* */
    D1,  /* second UTF-16 character decoding started by \ */
    D2,  /* second UTF-16 character proceeded by u */
    NR_STATES
};

enum actions
{
    CB = -10, /* comment begin */
    CE = -11, /* comment end */
    FA = -12, /* false */
    TR = -13, /* false */
    NU = -14, /* null */
    DE = -15, /* double detected by exponent e E */
    DF = -16, /* double detected by fraction . */
    SB = -17, /* string begin */
    MX = -18, /* integer detected by minus */
    ZX = -19, /* integer detected by zero */
    IX = -20, /* integer detected by 1-9 */
    EX = -21, /* next char is escaped */
    UC = -22  /* Unicode character read */
};


static const signed char state_transition_table[NR_STATES][NR_CLASSES] = {
/*
    The state transition table takes the current state and the current symbol,
    and returns either a new state or an action. An action is represented as a
    negative number. A JSON text is accepted if at the end of the text the
    state is OK and if the mode is MODE_DONE.

                 white                                      1-9                                   ABCDF  etc
             space |  {  }  [  ]  :  ,  "  \  /  +  -  .  0  |  a  b  c  d  e  f  l  n  r  s  t  u  |  E  |  * */
/*start  GO*/ {GO,GO,-6,__,-5,__,__,__,__,__,CB,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*ok     OK*/ {OK,OK,__,-8,__,-7,__,-3,__,__,CB,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*object OB*/ {OB,OB,__,-9,__,__,__,__,SB,__,CB,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*key    KE*/ {KE,KE,__,__,__,__,__,__,SB,__,CB,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*colon  CO*/ {CO,CO,__,__,__,__,-2,__,__,__,CB,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*value  VA*/ {VA,VA,-6,__,-5,__,__,__,SB,__,CB,__,MX,__,ZX,IX,__,__,__,__,__,FA,__,NU,__,__,TR,__,__,__,__,__},
/*array  AR*/ {AR,AR,-6,__,-5,-7,__,__,SB,__,CB,__,MX,__,ZX,IX,__,__,__,__,__,FA,__,NU,__,__,TR,__,__,__,__,__},
/*string ST*/ {ST,__,ST,ST,ST,ST,ST,ST,-4,EX,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST,ST},
/*escape ES*/ {__,__,__,__,__,__,__,__,ST,ST,ST,__,__,__,__,__,__,ST,__,__,__,ST,__,ST,ST,__,ST,U1,__,__,__,__},
/*u1     U1*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,U2,U2,U2,U2,U2,U2,U2,U2,__,__,__,__,__,__,U2,U2,__,__},
/*u2     U2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,U3,U3,U3,U3,U3,U3,U3,U3,__,__,__,__,__,__,U3,U3,__,__},
/*u3     U3*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,U4,U4,U4,U4,U4,U4,U4,U4,__,__,__,__,__,__,U4,U4,__,__},
/*u4     U4*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,UC,UC,UC,UC,UC,UC,UC,UC,__,__,__,__,__,__,UC,UC,__,__},
/*minus  MI*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,ZE,IT,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*zero   ZE*/ {OK,OK,__,-8,__,-7,__,-3,__,__,CB,__,__,DF,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*int    IT*/ {OK,OK,__,-8,__,-7,__,-3,__,__,CB,__,__,DF,IT,IT,__,__,__,__,DE,__,__,__,__,__,__,__,__,DE,__,__},
/*frac   FR*/ {OK,OK,__,-8,__,-7,__,-3,__,__,CB,__,__,__,FR,FR,__,__,__,__,E1,__,__,__,__,__,__,__,__,E1,__,__},
/*e      E1*/ {__,__,__,__,__,__,__,__,__,__,__,E2,E2,__,E3,E3,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*ex     E2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,E3,E3,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*exp    E3*/ {OK,OK,__,-8,__,-7,__,-3,__,__,__,__,__,__,E3,E3,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*tr     T1*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,T2,__,__,__,__,__,__,__},
/*tru    T2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,T3,__,__,__,__},
/*true   T3*/ {__,__,__,__,__,__,__,__,__,__,CB,__,__,__,__,__,__,__,__,__,OK,__,__,__,__,__,__,__,__,__,__,__},
/*fa     F1*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,F2,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*fal    F2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,F3,__,__,__,__,__,__,__,__,__},
/*fals   F3*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,F4,__,__,__,__,__,__},
/*false  F4*/ {__,__,__,__,__,__,__,__,__,__,CB,__,__,__,__,__,__,__,__,__,OK,__,__,__,__,__,__,__,__,__,__,__},
/*nu     N1*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,N2,__,__,__,__},
/*nul    N2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,N3,__,__,__,__,__,__,__,__,__},
/*null   N3*/ {__,__,__,__,__,__,__,__,__,__,CB,__,__,__,__,__,__,__,__,__,__,__,OK,__,__,__,__,__,__,__,__,__},
/*/      C1*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,C2},
/*/*     C2*/ {C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C3},
/**      C3*/ {C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,CE,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C2,C3},
/*_.     FX*/ {OK,OK,__,-8,__,-7,__,-3,__,__,__,__,__,__,FR,FR,__,__,__,__,E1,__,__,__,__,__,__,__,__,E1,__,__},
/*\      D1*/ {__,__,__,__,__,__,__,__,__,D2,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__},
/*\      D2*/ {__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,__,U1,__,__,__,__},
};


/*
    These modes can be pushed on the stack.
*/
enum modes {
    MODE_ARRAY = 1, 
    MODE_DONE = 2,  
    MODE_KEY = 3,   
    MODE_OBJECT = 4
};

static void set_error(JSON_parser jc)
{
    switch (jc->state) {
        case GO:
            switch (jc->current_char) {
            case '{': case '}': case '[': case ']': 
                jc->error = JSON_E_UNBALANCED_COLLECTION;
                break;
            default:
                jc->error = JSON_E_INVALID_CHAR;
                break;    
            }
            break;
        case OB:
            jc->error = JSON_E_EXPECTED_KEY;
            break;
        case AR:
            jc->error = JSON_E_UNBALANCED_COLLECTION;
            break;
        case CO:
            jc->error = JSON_E_EXPECTED_COLON;
            break;
        case KE:
            jc->error = JSON_E_EXPECTED_KEY;
            break;
        /* \uXXXX\uYYYY */
        case U1: case U2: case U3: case U4: case D1: case D2:
            jc->error = JSON_E_INVALID_UNICODE_SEQUENCE;
            break;
        /* true, false, null */
        case T1: case T2: case T3: case F1: case F2: case F3: case F4: case N1: case N2: case N3:
            jc->error = JSON_E_INVALID_KEYWORD;
            break;
        /* minus, integer, fraction, exponent */
        case MI: case ZE: case IT: case FR: case E1: case E2: case E3:
            jc->error = JSON_E_INVALID_NUMBER;
            break;
        default:
            jc->error = JSON_E_INVALID_CHAR;
            break;
    }
}

static int
push(JSON_parser jc, int mode)
{
/*
    Push a mode onto the stack. Return false if there is overflow.
*/
    assert(jc->top <= jc->stack_capacity);
    
    if (jc->depth < 0) {
        if (jc->top == jc->stack_capacity) {
            const size_t bytes_to_copy = jc->stack_capacity * sizeof(jc->stack[0]);
            const size_t new_capacity = jc->stack_capacity * 2;
            const size_t bytes_to_allocate = new_capacity * sizeof(jc->stack[0]);
            void* mem = JSON_parser_malloc(jc->malloc, bytes_to_allocate, "stack");
            if (!mem) {
                jc->error = JSON_E_OUT_OF_MEMORY;
                return false;
            }
            jc->stack_capacity = (int)new_capacity;
            memcpy(mem, jc->stack, bytes_to_copy);
            if (jc->stack != &jc->static_stack[0]) {
                jc->free(jc->stack);
            }
            jc->stack = (signed char*)mem;
        }
    } else {
        if (jc->top == jc->depth) {
            jc->error = JSON_E_NESTING_DEPTH_REACHED;
            return false;
        }
    }
    jc->stack[++jc->top] = (signed char)mode;
    return true;
}


static int
pop(JSON_parser jc, int mode)
{
/*
    Pop the stack, assuring that the current mode matches the expectation.
    Return false if there is underflow or if the modes mismatch.
*/
    if (jc->top < 0 || jc->stack[jc->top] != mode) {
        return false;
    }
    jc->top -= 1;
    return true;
}


#define parse_buffer_clear(jc) \
    do {\
        jc->parse_buffer_count = 0;\
        jc->parse_buffer[0] = 0;\
    } while (0)
    
#define parse_buffer_pop_back_char(jc)\
    do {\
        assert(jc->parse_buffer_count >= 1);\
        --jc->parse_buffer_count;\
        jc->parse_buffer[jc->parse_buffer_count] = 0;\
    } while (0)    



void delete_JSON_parser(JSON_parser jc)
{
    if (jc) {
        if (jc->stack != &jc->static_stack[0]) {
            jc->free((void*)jc->stack);
        }
        if (jc->parse_buffer != &jc->static_parse_buffer[0]) {
            jc->free((void*)jc->parse_buffer);
        }
        jc->free((void*)jc);
     }   
}

int JSON_parser_reset(JSON_parser jc)
{
    if (NULL == jc) {
        return false;
    }
    
    jc->state = GO;
    jc->top = -1;

    /* parser has been used previously? */
    if (NULL == jc->parse_buffer) {
    
        /* Do we want non-bound stack? */
        if (jc->depth > 0) {
            jc->stack_capacity = jc->depth;
            if (jc->depth <= (int)COUNTOF(jc->static_stack)) {
                jc->stack = &jc->static_stack[0];
            } else {
                const size_t bytes_to_alloc = jc->stack_capacity * sizeof(jc->stack[0]);
                jc->stack = (signed char*)JSON_parser_malloc(jc->malloc, bytes_to_alloc, "stack");
                if (jc->stack == NULL) {
                    return false;
                }
            }
        } else {
            jc->stack_capacity = (int)COUNTOF(jc->static_stack);
            jc->depth = -1;
            jc->stack = &jc->static_stack[0];
        }
        
        /* set up the parse buffer */
        jc->parse_buffer = &jc->static_parse_buffer[0];
        jc->parse_buffer_capacity = COUNTOF(jc->static_parse_buffer);
    }
    
    /* set parser to start */
    push(jc, MODE_DONE);
    parse_buffer_clear(jc);
    
    return true;
}

JSON_parser
new_JSON_parser(JSON_config const * config)
{
/*
    new_JSON_parser starts the checking process by constructing a JSON_parser
    object. It takes a depth parameter that restricts the level of maximum
    nesting.

    To continue the process, call JSON_parser_char for each character in the
    JSON text, and then call JSON_parser_done to obtain the final result.
    These functions are fully reentrant.
*/

    int use_std_malloc = false;
    JSON_config default_config;
    JSON_parser jc;
    JSON_malloc_t alloc;
    
    /* set to default configuration if none was provided */
    if (NULL == config) {
        /* initialize configuration */
        init_JSON_config(&default_config);
        config = &default_config;
    }
    
    /* use std malloc if either the allocator or deallocator function isn't set */
    use_std_malloc = NULL == config->malloc || NULL == config->free;
    
    alloc = use_std_malloc ? malloc : config->malloc;
    
    jc = JSON_parser_malloc(alloc, sizeof(*jc), "parser");    
    
    if (NULL == jc) {
        return NULL;
    }
    
    /* configure the parser */
    memset(jc, 0, sizeof(*jc));
    jc->malloc = alloc;
    jc->free = use_std_malloc ? free : config->free;
    jc->callback = config->callback;
    jc->ctx = config->callback_ctx;
    jc->allow_comments = (signed char)(config->allow_comments != 0);
    jc->handle_floats_manually = (signed char)(config->handle_floats_manually != 0);
    jc->decimal_point = *localeconv()->decimal_point;
    /* We need to be able to push at least one object */
    jc->depth = config->depth == 0 ? 1 : config->depth;
    
    /* reset the parser */
    if (!JSON_parser_reset(jc)) {
        jc->free(jc);
        return NULL;
    }
    
    return jc;
}

static int parse_buffer_grow(JSON_parser jc)
{
    const size_t bytes_to_copy = jc->parse_buffer_count * sizeof(jc->parse_buffer[0]);
    const size_t new_capacity = jc->parse_buffer_capacity * 2;
    const size_t bytes_to_allocate = new_capacity * sizeof(jc->parse_buffer[0]);
    void* mem = JSON_parser_malloc(jc->malloc, bytes_to_allocate, "parse buffer");
    
    if (mem == NULL) {
        jc->error = JSON_E_OUT_OF_MEMORY;
        return false;
    }
    
    assert(new_capacity > 0);
    memcpy(mem, jc->parse_buffer, bytes_to_copy);
    
    if (jc->parse_buffer != &jc->static_parse_buffer[0]) {
        jc->free(jc->parse_buffer);
    }
    
    jc->parse_buffer = (char*)mem;
    jc->parse_buffer_capacity = new_capacity;
    
    return true;
}

static int parse_buffer_reserve_for(JSON_parser jc, unsigned chars)
{
    while (jc->parse_buffer_count + chars + 1 > jc->parse_buffer_capacity) {
        if (!parse_buffer_grow(jc)) {
            assert(jc->error == JSON_E_OUT_OF_MEMORY);
            return false;
        }
    }
    
    return true;
}

#define parse_buffer_has_space_for(jc, count) \
    (jc->parse_buffer_count + (count) + 1 <= jc->parse_buffer_capacity)

#define parse_buffer_push_back_char(jc, c)\
    do {\
        assert(parse_buffer_has_space_for(jc, 1)); \
        jc->parse_buffer[jc->parse_buffer_count++] = c;\
        jc->parse_buffer[jc->parse_buffer_count]   = 0;\
    } while (0)

#define assert_is_non_container_type(jc) \
    assert( \
        jc->type == JSON_T_NULL || \
        jc->type == JSON_T_FALSE || \
        jc->type == JSON_T_TRUE || \
        jc->type == JSON_T_FLOAT || \
        jc->type == JSON_T_INTEGER || \
        jc->type == JSON_T_STRING)
    

static int parse_parse_buffer(JSON_parser jc)
{
    if (jc->callback) {
        JSON_value value, *arg = NULL;
        
        if (jc->type != JSON_T_NONE) {
            assert_is_non_container_type(jc);
        
            switch(jc->type) {
                case JSON_T_FLOAT:
                    arg = &value;
                    if (jc->handle_floats_manually) {
                        value.vu.str.value = jc->parse_buffer;
                        value.vu.str.length = jc->parse_buffer_count;
                    } else { 
                        /* not checking with end pointer b/c there may be trailing ws */
                        value.vu.float_value = strtod(jc->parse_buffer, NULL);
                    }
                    break;
                case JSON_T_INTEGER:
                    arg = &value;
                    sscanf(jc->parse_buffer, JSON_PARSER_INTEGER_SSCANF_TOKEN, &value.vu.integer_value);
                    break;
                case JSON_T_STRING:
                    arg = &value;
                    value.vu.str.value = jc->parse_buffer;
                    value.vu.str.length = jc->parse_buffer_count;
                    break;
            }
            
            if (!(*jc->callback)(jc->ctx, jc->type, arg)) {
                return false;
            }
        }
    }
    
    parse_buffer_clear(jc);
    
    return true;
}

#define IS_HIGH_SURROGATE(uc) (((uc) & 0xFC00) == 0xD800)
#define IS_LOW_SURROGATE(uc)  (((uc) & 0xFC00) == 0xDC00)
#define DECODE_SURROGATE_PAIR(hi,lo) ((((hi) & 0x3FF) << 10) + ((lo) & 0x3FF) + 0x10000)
static const unsigned char utf8_lead_bits[4] = { 0x00, 0xC0, 0xE0, 0xF0 };

static int decode_unicode_char(JSON_parser jc)
{
    int i;
    unsigned uc = 0;
    char* p;
    int trail_bytes;
    
    assert(jc->parse_buffer_count >= 6);
    
    p = &jc->parse_buffer[jc->parse_buffer_count - 4];
    
    for (i = 12; i >= 0; i -= 4, ++p) {
        unsigned x = *p;
        
        if (x >= 'a') {
            x -= ('a' - 10);
        } else if (x >= 'A') {
            x -= ('A' - 10);
        } else {
            x &= ~0x30u;
        }
        
        assert(x < 16);
        
        uc |= x << i;
    }
    
    /* clear UTF-16 char from buffer */
    jc->parse_buffer_count -= 6;
    jc->parse_buffer[jc->parse_buffer_count] = 0;
    
    /* attempt decoding ... */
    if (jc->utf16_high_surrogate) {
        if (IS_LOW_SURROGATE(uc)) {
            uc = DECODE_SURROGATE_PAIR(jc->utf16_high_surrogate, uc);
            trail_bytes = 3;
            jc->utf16_high_surrogate = 0;
        } else {
            /* high surrogate without a following low surrogate */
            return false;
        }
    } else {
        if (uc < 0x80) {
            trail_bytes = 0;
        } else if (uc < 0x800) {
            trail_bytes = 1;
        } else if (IS_HIGH_SURROGATE(uc)) {
            /* save the high surrogate and wait for the low surrogate */
            jc->utf16_high_surrogate = (UTF16)uc;
            return true;
        } else if (IS_LOW_SURROGATE(uc)) {
            /* low surrogate without a preceding high surrogate */
            return false;
        } else {
            trail_bytes = 2;
        }
    }
    
    jc->parse_buffer[jc->parse_buffer_count++] = (char) ((uc >> (trail_bytes * 6)) | utf8_lead_bits[trail_bytes]);
    
    for (i = trail_bytes * 6 - 6; i >= 0; i -= 6) {
        jc->parse_buffer[jc->parse_buffer_count++] = (char) (((uc >> i) & 0x3F) | 0x80);
    }

    jc->parse_buffer[jc->parse_buffer_count] = 0;
    
    return true;
}

static int add_escaped_char_to_parse_buffer(JSON_parser jc, int next_char)
{
    assert(parse_buffer_has_space_for(jc, 1));
    
    jc->escaped = 0;
    /* remove the backslash */
    parse_buffer_pop_back_char(jc);
    switch(next_char) {
        case 'b':
            parse_buffer_push_back_char(jc, '\b');
            break;
        case 'f':
            parse_buffer_push_back_char(jc, '\f');
            break;
        case 'n':
            parse_buffer_push_back_char(jc, '\n');
            break;
        case 'r':
            parse_buffer_push_back_char(jc, '\r');
            break;
        case 't':
            parse_buffer_push_back_char(jc, '\t');
            break;
        case '"':
            parse_buffer_push_back_char(jc, '"');
            break;
        case '\\':
            parse_buffer_push_back_char(jc, '\\');
            break;
        case '/':
            parse_buffer_push_back_char(jc, '/');
            break;
        case 'u':
            parse_buffer_push_back_char(jc, '\\');
            parse_buffer_push_back_char(jc, 'u');
            break;
        default:
            return false;
    }

    return true;
}

static int add_char_to_parse_buffer(JSON_parser jc, int next_char, int next_class)
{
    if (!parse_buffer_reserve_for(jc, 1)) {
        assert(JSON_E_OUT_OF_MEMORY == jc->error);
        return false;
    }
    
    if (jc->escaped) {
        if (!add_escaped_char_to_parse_buffer(jc, next_char)) {
            jc->error = JSON_E_INVALID_ESCAPE_SEQUENCE;
            return false; 
        }
    } else if (!jc->comment) {
        if ((jc->type != JSON_T_NONE) | !((next_class == C_SPACE) | (next_class == C_WHITE)) /* non-white-space */) {
            parse_buffer_push_back_char(jc, (char)next_char);
        }
    }
    
    return true;
}

#define assert_type_isnt_string_null_or_bool(jc) \
    assert(jc->type != JSON_T_FALSE); \
    assert(jc->type != JSON_T_TRUE); \
    assert(jc->type != JSON_T_NULL); \
    assert(jc->type != JSON_T_STRING)


int
JSON_parser_char(JSON_parser jc, int next_char)
{
/*
    After calling new_JSON_parser, call this function for each character (or
    partial character) in your JSON text. It can accept UTF-8, UTF-16, or
    UTF-32. It returns true if things are looking ok so far. If it rejects the
    text, it returns false.
*/
    int next_class, next_state;

/*
    Store the current char for error handling
*/    
    jc->current_char = next_char;
    
/*
    Determine the character's class.
*/
    if (next_char < 0) {
        jc->error = JSON_E_INVALID_CHAR;
        return false;
    }
    if (next_char >= 128) {
        next_class = C_ETC;
    } else {
        next_class = ascii_class[next_char];
        if (next_class <= __) {
            set_error(jc);
            return false;
        }
    }
    
    if (!add_char_to_parse_buffer(jc, next_char, next_class)) {
        return false;
    }
    
/*
    Get the next state from the state transition table.
*/
    next_state = state_transition_table[jc->state][next_class];
    if (next_state >= 0) {
/*
    Change the state.
*/
        jc->state = (signed char)next_state;
    } else {
/*
    Or perform one of the actions.
*/
        switch (next_state) {
/* Unicode character */        
        case UC:
            if(!decode_unicode_char(jc)) {
                jc->error = JSON_E_INVALID_UNICODE_SEQUENCE;
                return false;
            }
            /* check if we need to read a second UTF-16 char */
            if (jc->utf16_high_surrogate) {
                jc->state = D1;
            } else {
                jc->state = ST;
            }
            break;
/* escaped char */
        case EX:
            jc->escaped = 1;
            jc->state = ES;
            break;
/* integer detected by minus */
        case MX:
            jc->type = JSON_T_INTEGER;
            jc->state = MI;
            break;  
/* integer detected by zero */            
        case ZX:
            jc->type = JSON_T_INTEGER;
            jc->state = ZE;
            break;  
/* integer detected by 1-9 */            
        case IX:
            jc->type = JSON_T_INTEGER;
            jc->state = IT;
            break;  
            
/* floating point number detected by exponent*/
        case DE:
            assert_type_isnt_string_null_or_bool(jc);
            jc->type = JSON_T_FLOAT;
            jc->state = E1;
            break;   
        
/* floating point number detected by fraction */
        case DF:
            assert_type_isnt_string_null_or_bool(jc);
            if (!jc->handle_floats_manually) {
/*
    Some versions of strtod (which underlies sscanf) don't support converting 
    C-locale formated floating point values.
*/           
                assert(jc->parse_buffer[jc->parse_buffer_count-1] == '.');
                jc->parse_buffer[jc->parse_buffer_count-1] = jc->decimal_point;
            }            
            jc->type = JSON_T_FLOAT;
            jc->state = FX;
            break;   
/* string begin " */
        case SB:
            parse_buffer_clear(jc);
            assert(jc->type == JSON_T_NONE);
            jc->type = JSON_T_STRING;
            jc->state = ST;
            break;        
        
/* n */
        case NU:
            assert(jc->type == JSON_T_NONE);
            jc->type = JSON_T_NULL;
            jc->state = N1;
            break;        
/* f */
        case FA:
            assert(jc->type == JSON_T_NONE);
            jc->type = JSON_T_FALSE;
            jc->state = F1;
            break;        
/* t */
        case TR:
            assert(jc->type == JSON_T_NONE);
            jc->type = JSON_T_TRUE;
            jc->state = T1;
            break;        
        
/* closing comment */
        case CE:
            jc->comment = 0;
            assert(jc->parse_buffer_count == 0);
            assert(jc->type == JSON_T_NONE);
            jc->state = jc->before_comment_state;
            break;        
        
/* opening comment  */
        case CB:
            if (!jc->allow_comments) {
                return false;
            }
            parse_buffer_pop_back_char(jc);
            if (!parse_parse_buffer(jc)) {
                return false;
            }
            assert(jc->parse_buffer_count == 0);
            assert(jc->type != JSON_T_STRING);
            switch (jc->stack[jc->top]) {
            case MODE_ARRAY:
            case MODE_OBJECT:   
                switch(jc->state) {
                case VA:
                case AR:
                    jc->before_comment_state = jc->state;
                    break;
                default:
                    jc->before_comment_state = OK;
                    break;
                }
                break;
            default:
                jc->before_comment_state = jc->state;
                break;
            }
            jc->type = JSON_T_NONE;
            jc->state = C1;
            jc->comment = 1;
            break;
/* empty } */
        case -9:        
            parse_buffer_clear(jc);
            if (jc->callback && !(*jc->callback)(jc->ctx, JSON_T_OBJECT_END, NULL)) {
                return false;
            }
            if (!pop(jc, MODE_KEY)) {
                return false;
            }
            jc->state = OK;
            break;

/* } */ case -8:
            parse_buffer_pop_back_char(jc);
            if (!parse_parse_buffer(jc)) {
                return false;
            }
            if (jc->callback && !(*jc->callback)(jc->ctx, JSON_T_OBJECT_END, NULL)) {
                return false;
            }
            if (!pop(jc, MODE_OBJECT)) {
                jc->error = JSON_E_UNBALANCED_COLLECTION;
                return false;
            }
            jc->type = JSON_T_NONE;
            jc->state = OK;
            break;

/* ] */ case -7:
            parse_buffer_pop_back_char(jc);
            if (!parse_parse_buffer(jc)) {
                return false;
            }
            if (jc->callback && !(*jc->callback)(jc->ctx, JSON_T_ARRAY_END, NULL)) {
                return false;
            }
            if (!pop(jc, MODE_ARRAY)) {
                jc->error = JSON_E_UNBALANCED_COLLECTION;
                return false;
            }
            
            jc->type = JSON_T_NONE;
            jc->state = OK;
            break;

/* { */ case -6:
            parse_buffer_pop_back_char(jc);
            if (jc->callback && !(*jc->callback)(jc->ctx, JSON_T_OBJECT_BEGIN, NULL)) {
                return false;
            }
            if (!push(jc, MODE_KEY)) {
                return false;
            }
            assert(jc->type == JSON_T_NONE);
            jc->state = OB;
            break;

/* [ */ case -5:
            parse_buffer_pop_back_char(jc);
            if (jc->callback && !(*jc->callback)(jc->ctx, JSON_T_ARRAY_BEGIN, NULL)) {
                return false;
            }
            if (!push(jc, MODE_ARRAY)) {
                return false;
            }
            assert(jc->type == JSON_T_NONE);
            jc->state = AR;
            break;

/* string end " */ case -4:
            parse_buffer_pop_back_char(jc);
            switch (jc->stack[jc->top]) {
            case MODE_KEY:
                assert(jc->type == JSON_T_STRING);
                jc->type = JSON_T_NONE;
                jc->state = CO;
                
                if (jc->callback) {
                    JSON_value value;
                    value.vu.str.value = jc->parse_buffer;
                    value.vu.str.length = jc->parse_buffer_count;
                    if (!(*jc->callback)(jc->ctx, JSON_T_KEY, &value)) {
                        return false;
                    }
                }
                parse_buffer_clear(jc);
                break;
            case MODE_ARRAY:
            case MODE_OBJECT:
                assert(jc->type == JSON_T_STRING);
                if (!parse_parse_buffer(jc)) {
                    return false;
                }
                jc->type = JSON_T_NONE;
                jc->state = OK;
                break;
            default:
                return false;
            }
            break;

/* , */ case -3:
            parse_buffer_pop_back_char(jc);
            if (!parse_parse_buffer(jc)) {
                return false;
            }
            switch (jc->stack[jc->top]) {
            case MODE_OBJECT:
/*
    A comma causes a flip from object mode to key mode.
*/
                if (!pop(jc, MODE_OBJECT) || !push(jc, MODE_KEY)) {
                    return false;
                }
                assert(jc->type != JSON_T_STRING);
                jc->type = JSON_T_NONE;
                jc->state = KE;
                break;
            case MODE_ARRAY:
                assert(jc->type != JSON_T_STRING);
                jc->type = JSON_T_NONE;
                jc->state = VA;
                break;
            default:
                return false;
            }
            break;

/* : */ case -2:
/*
    A colon causes a flip from key mode to object mode.
*/
            parse_buffer_pop_back_char(jc);
            if (!pop(jc, MODE_KEY) || !push(jc, MODE_OBJECT)) {
                return false;
            }
            assert(jc->type == JSON_T_NONE);
            jc->state = VA;
            break;
/*
    Bad action.
*/
        default:
            set_error(jc);
            return false;
        }
    }
    return true;
}

int
JSON_parser_done(JSON_parser jc)
{
    if ((jc->state == OK || jc->state == GO) && pop(jc, MODE_DONE))
    {
        return true;
    }

    jc->error = JSON_E_UNBALANCED_COLLECTION;
    return false;
}


int JSON_parser_is_legal_white_space_string(const char* s)
{
    int c, char_class;
    
    if (s == NULL) {
        return false;
    }
    
    for (; *s; ++s) {   
        c = *s;
        
        if (c < 0 || c >= 128) {
            return false;
        }
        
        char_class = ascii_class[c];
        
        if (char_class != C_SPACE && char_class != C_WHITE) {
            return false;
        }
    }
    
    return true;
}

int JSON_parser_get_last_error(JSON_parser jc)
{
    return jc->error;
}


void init_JSON_config(JSON_config* config)
{
    if (config) {
        memset(config, 0, sizeof(*config));
        
        config->depth = JSON_PARSER_STACK_SIZE - 1;
        config->malloc = malloc;
        config->free = free;
    }
}
/* end file parser/JSON_parser.c */
/* begin file ./cson.c */
#include <assert.h>
#include <stdlib.h> /* malloc()/free() */
#include <string.h>

#ifdef _MSC_VER
#   if _MSC_VER >= 1400 /* Visual Studio 2005 and up */
#     pragma warning( push )
#     pragma warning(disable:4996) /* unsecure sscanf (but snscanf() isn't in c89) */
#     pragma warning(disable:4244) /* complaining about data loss due
                                      to integer precision in the
                                      sqlite3 utf decoding routines */
#   endif
#endif

#if 1
#include <stdio.h>
#define MARKER if(1) printf("MARKER: %s:%d:%s():\t",__FILE__,__LINE__,__func__); if(1) printf
#else
static void noop_printf(char const * fmt, ...) {}
#define MARKER if(0) printf
#endif

#if defined(__cplusplus)
extern "C" {
#endif


    
/**
   Type IDs corresponding to JavaScript/JSON types.
*/
enum cson_type_id {
  /**
    The special "null" value constant.

    Its value must be 0 for internal reasons.
 */
 CSON_TYPE_UNDEF = 0,
 /**
    The special "null" value constant.
 */
 CSON_TYPE_NULL = 1,
 /**
    The bool value type.
 */
 CSON_TYPE_BOOL = 2,
 /**
    The integer value type, represented in this library
    by cson_int_t.
 */
 CSON_TYPE_INTEGER = 3,
 /**
    The double value type, represented in this library
    by cson_double_t.
 */
 CSON_TYPE_DOUBLE = 4,
 /** The immutable string type. This library stores strings
    as immutable UTF8.
 */
 CSON_TYPE_STRING = 5,
 /** The "Array" type. */
 CSON_TYPE_ARRAY = 6,
 /** The "Object" type. */
 CSON_TYPE_OBJECT = 7
};
typedef enum cson_type_id cson_type_id;

/**
   This type holds the "vtbl" for type-specific operations when
   working with cson_value objects.

   All cson_values of a given logical type share a pointer to a single
   library-internal instance of this class.
*/
struct cson_value_api
{
    /**
       The logical JavaScript/JSON type associated with
       this object.
     */
    const cson_type_id typeID;
    /**
       Must free any memory associated with self,
       but not free self. If self is NULL then
       this function must do nothing.
    */
    void (*cleanup)( cson_value * self );
    /**
       POSSIBLE TODOs:

       // Deep copy.
       int (*clone)( cson_value const * self, cson_value ** tgt );

       // Using JS semantics for true/value
       char (*bool_value)( cson_value const * self );

       // memcmp() return value semantics
       int (*compare)( cson_value const * self, cson_value const * other );
     */
};

typedef struct cson_value_api cson_value_api;

/**
   Empty-initialized cson_value_api object.
*/
#define cson_value_api_empty_m {           \
        CSON_TYPE_UNDEF/*typeID*/,         \
        NULL/*cleanup*/\
      }
/**
   Empty-initialized cson_value_api object.
*/
static const cson_value_api cson_value_api_empty = cson_value_api_empty_m;


typedef unsigned int cson_counter_t;
struct cson_value
{
    /** The "vtbl" of type-specific operations. All instances
        of a given logical value type share a single api instance.

        Results are undefined if this value is NULL.
    */
    cson_value_api const * api;

    /** The raw value. Its interpretation depends on the value of the
        api member. Some value types require dynamically-allocated
        memory, so one must always call cson_value_free() to destroy a
        value when it is no longer needed. For stack-allocated values
        (which client could SHOULD NOT USE unless they are intimately
        familiar with the memory management rules and don't mind an
        occasional leak or crash), use cson_value_clean() instead of
        cson_value_free().
    */
    void * value;

    /**
       We use this to allow us to store cson_value instances in
       multiple containers or multiple times within a single container
       (provided no cycles are introduced).

       Notes about the rc implementation:

       - The refcount is for the cson_value instance itself, not its
       value pointer.

       - Instances start out with a refcount of 0 (not 1). Adding them
       to a container will increase the refcount. Cleaning up the container
       will decrement the count.

       - cson_value_free() decrements the refcount (if it is not already
       0) and cleans/frees the value only when the refcount is 0.

       - Some places in the internals add an "extra" reference to
       objects to avoid a premature deletion. Don't try this at home.
    */
    cson_counter_t refcount;
};


/**
   Empty-initialized cson_value object.
*/
#define cson_value_empty_m { &cson_value_api_empty/*api*/, NULL/*value*/, 0/*refcount*/ }
/**
   Empty-initialized cson_value object.
*/
extern const cson_value cson_value_empty;

const cson_value cson_value_empty = cson_value_empty_m;
const cson_parse_opt cson_parse_opt_empty = cson_parse_opt_empty_m;
const cson_output_opt cson_output_opt_empty = cson_output_opt_empty_m;
const cson_object_iterator cson_object_iterator_empty = cson_object_iterator_empty_m;
const cson_buffer cson_buffer_empty = cson_buffer_empty_m;
const cson_parse_info cson_parse_info_empty = cson_parse_info_empty_m;

static void cson_value_destroy_zero_it( cson_value * self );
static void cson_value_destroy_free( cson_value * self );
static void cson_value_destroy_object( cson_value * self );
static void cson_value_destroy_integer( cson_value * self );
/**
   If self is-a array then this function destroys its contents,
   else this function does nothing.
*/
static void cson_value_destroy_array( cson_value * self );

/**
   If self is-a string then this function destroys its contents,
   else this function does nothing.
*/
static void cson_value_destroy_string( cson_value * self );

static const cson_value_api cson_value_api_null = { CSON_TYPE_NULL, cson_value_destroy_zero_it };
static const cson_value_api cson_value_api_undef = { CSON_TYPE_UNDEF, cson_value_destroy_zero_it };
static const cson_value_api cson_value_api_bool = { CSON_TYPE_BOOL, cson_value_destroy_zero_it };
static const cson_value_api cson_value_api_integer = { CSON_TYPE_INTEGER, cson_value_destroy_integer };
static const cson_value_api cson_value_api_double = { CSON_TYPE_DOUBLE, cson_value_destroy_free };
static const cson_value_api cson_value_api_string = { CSON_TYPE_STRING, cson_value_destroy_string };
static const cson_value_api cson_value_api_array = { CSON_TYPE_ARRAY, cson_value_destroy_array };
static const cson_value_api cson_value_api_object = { CSON_TYPE_OBJECT, cson_value_destroy_object };

static const cson_value cson_value_undef = { &cson_value_api_undef, NULL, 0 };
static const cson_value cson_value_bool_empty = { &cson_value_api_bool, NULL, 0 };
static const cson_value cson_value_integer_empty = { &cson_value_api_integer, NULL, 0 };
static const cson_value cson_value_double_empty = { &cson_value_api_double, NULL, 0 };
static const cson_value cson_value_string_empty = { &cson_value_api_string, NULL, 0 };
static const cson_value cson_value_array_empty = { &cson_value_api_array, NULL, 0 };
static const cson_value cson_value_object_empty = { &cson_value_api_object, NULL, 0 };


struct cson_string
{
    unsigned int length;
};
#define cson_string_empty_m {0/*length*/}

/**
 
 Holds special shared "constant" (though they are non-const)
 values.
 
*/
static struct CSON_EMPTY_HOLDER_
{
    char trueValue;
    cson_string stringValue;
} CSON_EMPTY_HOLDER = {
    1/*trueValue*/,
    cson_string_empty_m
};

/**
    Indexes into the CSON_SPECIAL_VALUES array.
    
    If this enum changes in any way,
    makes damned sure that CSON_SPECIAL_VALUES is updated
    to match!!!
*/
enum CSON_INTERNAL_VALUES {
    
    CSON_VAL_UNDEF = 0,
    CSON_VAL_NULL = 1,
    CSON_VAL_TRUE = 2,
    CSON_VAL_FALSE = 3,
    CSON_VAL_INT_0 = 4,
    CSON_VAL_DBL_0 = 5,
    CSON_VAL_STR_EMPTY = 6,
    CSON_INTERNAL_VALUES_LENGTH
};

/**
  Some "special" shared cson_value instances.

  These values MUST be initialized in the order specified
  by the CSON_INTERNAL_VALUES enum.
   
  Note that they are not const because they are used as
  shared-allocation objects in non-const contexts. However, the
  public API provides no way to modifying them, and clients who
  modify values directly are subject to The Wrath of Undefined
  Behaviour.
*/
static cson_value CSON_SPECIAL_VALUES[] = {
{ &cson_value_api_undef, NULL, 0 }, /* UNDEF */
{ &cson_value_api_null, NULL, 0 }, /* NULL */
{ &cson_value_api_bool, &CSON_EMPTY_HOLDER.trueValue, 0 }, /* TRUE */
{ &cson_value_api_bool, NULL, 0 }, /* FALSE */
{ &cson_value_api_integer, NULL, 0 }, /* INT_0 */
{ &cson_value_api_double, NULL, 0 }, /* DBL_0 */
{ &cson_value_api_string, &CSON_EMPTY_HOLDER.stringValue, 0 }, /* STR_EMPTY */
{ 0, NULL, 0 }
};


/**
    Returns non-0 (true) if m is one of our special
    "built-in" values, e.g. from CSON_SPECIAL_VALUES and some
    "empty" values.
     
    If this returns true, m MUST NOT be free()d!
 */
static char cson_value_is_builtin( void const * m )
{
    if((m >= (void const *)&CSON_EMPTY_HOLDER)
        && ( m < (void const *)(&CSON_EMPTY_HOLDER+1)))
        return 1;
    else return
        ((m > (void const *)&CSON_SPECIAL_VALUES[0])
        && ( m < (void const *)&CSON_SPECIAL_VALUES[CSON_INTERNAL_VALUES_LENGTH]) )
        ? 1
        : 0;
}

char const * cson_rc_string(int rc)
{
    if(0 == rc) return "OK";
#define CHECK(N) else if(cson_rc.N == rc ) return #N
    CHECK(OK);
    CHECK(ArgError);
    CHECK(RangeError);
    CHECK(TypeError);
    CHECK(IOError);
    CHECK(AllocError);
    CHECK(NYIError);
    CHECK(InternalError);
    CHECK(UnsupportedError);
    CHECK(NotFoundError);
    CHECK(UnknownError);
    CHECK(Parse_INVALID_CHAR);
    CHECK(Parse_INVALID_KEYWORD);
    CHECK(Parse_INVALID_ESCAPE_SEQUENCE);
    CHECK(Parse_INVALID_UNICODE_SEQUENCE);
    CHECK(Parse_INVALID_NUMBER);
    CHECK(Parse_NESTING_DEPTH_REACHED);
    CHECK(Parse_UNBALANCED_COLLECTION);
    CHECK(Parse_EXPECTED_KEY);
    CHECK(Parse_EXPECTED_COLON);
    else return "UnknownError";
#undef CHECK
}

/**
   If CSON_LOG_ALLOC is true then the cson_malloc/realloc/free() routines
   will log a message to stderr.
*/
#define CSON_LOG_ALLOC 0

/**
   A test/debug macro for simulating an OOM after the given number of
   bytes have been allocated.
*/
#define CSON_SIMULATE_OOM 0
#if CSON_SIMULATE_OOM
static unsigned int cson_totalAlloced = 0;
#endif

/** Simple proxy for malloc(). descr is a description of the allocation. */
static void * cson_malloc( size_t n, char const * descr )
{
#if CSON_LOG_ALLOC
    fprintf(stderr, "Allocating %u bytes [%s].\n", (unsigned int)n, descr);
#endif
#if CSON_SIMULATE_OOM
    cson_totalAlloced += n;
    if( cson_totalAlloced > CSON_SIMULATE_OOM )
    {
        return NULL;
    }
#endif
    return malloc(n);
}

/** Simple proxy for free(). descr is a description of the memory being freed. */
static void cson_free( void * p, char const * descr )
{
#if CSON_LOG_ALLOC
    fprintf(stderr, "Freeing @%p [%s].\n", p, descr);
#endif
    if( !cson_value_is_builtin(p) )
    {
        free( p );
    }
}
/** Simple proxy for realloc(). descr is a description of the (re)allocation. */
static void * cson_realloc( void * hint, size_t n, char const * descr )
{
#if CSON_LOG_ALLOC
    fprintf(stderr, "%sllocating %u bytes [%s].\n",
            hint ? "Rea" : "A",
            (unsigned int)n, descr);
#endif
#if CSON_SIMULATE_OOM
    cson_totalAlloced += n;
    if( cson_totalAlloced > CSON_SIMULATE_OOM )
    {
        return NULL;
    }
#endif
    if( 0==n )
    {
         cson_free(hint, descr);
         return NULL;
    }
    else
    {
        return realloc( hint, n );
    }
}


#undef CSON_LOG_ALLOC
#undef CSON_SIMULATE_OOM



/**
   CLIENTS CODE SHOULD NEVER USE THIS because it opens up doors to
   memory leaks if it is not used in very controlled circumstances.
   Users must be very aware of how the underlying memory management
   works.

   Frees any resources owned by val, but does not free val itself
   (which may be stack-allocated). If !val or val->api or
   val->api->cleanup are NULL then this is a no-op.

   If v is a container type (object or array) its children are also
   cleaned up (BUT NOT FREED), recursively.

   After calling this, val will have the special "undefined" type.
*/
static void cson_value_clean( cson_value * val );

/**
   Increments cv's reference count by 1.  As a special case, values
   for which cson_value_is_builtin() returns true are not
   modified. assert()s if (NULL==cv).
*/
static void cson_refcount_incr( cson_value * cv )
{
    assert( NULL != cv );
    if( cson_value_is_builtin( cv ) )
    { /* do nothing: we do not want to modify the shared
         instances.
      */
        return;
    }
    else
    {
        ++cv->refcount;
    }
}

#if 0
int cson_value_refcount_set( cson_value * cv, unsigned short rc )
{
    if( NULL == cv ) return cson_rc.ArgError;
    else
    {
        cv->refcount = rc;
        return 0;
    }
}
#endif

int cson_value_add_reference( cson_value * cv )
{
    if( NULL == cv ) return cson_rc.ArgError;
    else if( (cv->refcount+1) < cv->refcount )
    {
        return cson_rc.RangeError;
    }
    else
    {
        cson_refcount_incr( cv );
        return 0;
    }
}

/**
   If cv is NULL or cson_value_is_builtin(cv) returns true then this
   function does nothing and returns 0, otherwise...  If
   cv->refcount is 0 or 1 then cson_value_clean(cv) is called, cv is
   freed, and 0 is returned. If cv->refcount is any other value then
   it is decremented and the new value is returned.
*/
static cson_counter_t cson_refcount_decr( cson_value * cv )
{
    if( (NULL == cv) || cson_value_is_builtin(cv) ) return 0;
    else if( (0 == cv->refcount) || (0 == --cv->refcount) )
    {
        cson_value_clean(cv);
        cson_free(cv,"cson_value::refcount=0");
        return 0;
    }
    else return cv->refcount;
}

/**
   Allocates a new cson_string object with enough space for
   the given number of bytes. A byte for a NUL terminator
   is added automatically. Use cson_string_str() to get
   access to the string bytes, which will be len bytes long.

   len may be 0, in which case the internal string is "", as opposed
   to null. This is because the string bytes and the cson_string are
   allocated in a single chunk of memory, and the cson_string object
   does not directly provide (or have) a pointer to the string bytes.
*/
static cson_string * cson_string_alloc(unsigned int len)
{
    if( ! len ) return &CSON_EMPTY_HOLDER.stringValue;
    else
    {
        cson_string * s = NULL;
        const size_t msz = sizeof(cson_string) + len + 1 /*NUL*/;
        unsigned char * mem = NULL;
        if( msz < (sizeof(cson_string)+len) ) /*overflow*/ return NULL;
        mem = (unsigned char *)cson_malloc( msz, "cson_string_alloc" );
        if( mem )
        {
            memset( mem, 0, msz );
            s = (cson_string *)mem;
            s->length = len;
        }
        return s;
    }
}

unsigned int cson_string_length_bytes( cson_string const * str )
{
    return str ? str->length : 0;
}


/**
   Fetches v's string value as a non-const string.

   cson_strings are supposed to be immutable, but this form provides
   access to the immutable bits, which are v->length bytes long. A
   length-0 string is returned as NULL from here, as opposed to
   "". (This is a side-effect of the string allocation mechanism.)
   Returns NULL if !v.
*/
static char * cson_string_str(cson_string *v)
{
    /*
      See http://groups.google.com/group/comp.lang.c.moderated/browse_thread/thread/2e0c0df5e8a0cd6a
    */
#if 1
    if( !v || (&CSON_EMPTY_HOLDER.stringValue == v) ) return NULL;
    else return (char *)((unsigned char *)( v+1 ));
#else
    static char empty[2] = {0,0};
    return ( NULL == v )
        ? NULL
        : (v->length
           ? (char *) (((unsigned char *)v) + sizeof(cson_string))
           : empty)
        ;
#endif
}

/**
   Fetches v's string value as a const string.
*/
char const * cson_string_cstr(cson_string const *v)
{
    /*
      See http://groups.google.com/group/comp.lang.c.moderated/browse_thread/thread/2e0c0df5e8a0cd6a
    */
#if 1
    if( ! v ) return NULL;
    else if( v == &CSON_EMPTY_HOLDER.stringValue ) return "";
    else return (char *)((unsigned char *)(v+1));
#else
    return (NULL == v)
        ? NULL
        : (v->length
           ? (char const *) ((unsigned char const *)(v+1))
           : "");
#endif
}


#if 0
/**
   Just like strndup(3), in that neither are C89/C99-standard and both
   are documented in detail in strndup(3).
*/
static char * cson_strdup( char const * src, size_t n )
{
    char * rc = (char *)cson_malloc(n+1, "cson_strdup");
    if( ! rc ) return NULL;
    memset( rc, 0, n+1 );
    rc[n] = 0;
    return strncpy( rc, src, n );
}
#endif

/**
   Allocates a new cson_string() from the the first n bytes of src.
   Returns NULL on allocation error, else the caller owns the returned
   object and must eventually free() it.
*/
static cson_string * cson_string_strdup( char const * src, size_t n )
{
    cson_string * cs = cson_string_alloc(n);
    if( ! cs ) return NULL;
    else if( &CSON_EMPTY_HOLDER.stringValue == cs ) return cs;
    else
    {
        char * cstr = cson_string_str(cs);
        assert( cs->length == n );
        if( cstr && n )
        {
            strncpy( cstr, src, n );
        }
        return cs;
    }
}


int cson_string_cmp_cstr_n( cson_string const * str, char const * other, unsigned int otherLen )
{
    if( ! other && !str ) return 0;
    else if( other && !str ) return 1;
    else if( str && !other ) return -1;
    else if( !otherLen ) return  str->length ? 1 : 0;
    else if( !str->length ) return otherLen ? -1 : 0;
    else
    {
        unsigned const int max = (otherLen > str->length) ? otherLen : str->length;
        int const rc = strncmp( cson_string_cstr(str), other, max );
        return ( (0 == rc) && (otherLen != str->length) )
            ? (str->length < otherLen) ? -1 : 1
            : rc;
    }
}

int cson_string_cmp_cstr( cson_string const * lhs, char const * rhs )
{
    return cson_string_cmp_cstr_n( lhs, rhs, (rhs&&*rhs) ? strlen(rhs) : 0 );
}
int cson_string_cmp( cson_string const * lhs, cson_string const * rhs )
{
    return cson_string_cmp_cstr_n( lhs, cson_string_cstr(rhs), rhs ? rhs->length : 0 );
}


/**
   If self is not NULL, *self is overwritten to have the undefined
   type. self is not cleaned up or freed.
*/
void cson_value_destroy_zero_it( cson_value * self )
{
    if( self )
    {
        *self = cson_value_undef;
    }
}

/**
   If self is not null, free(self->value) is called.  *self is then
   overwritten to have the undefined type. self is not freed.

*/
void cson_value_destroy_free( cson_value * self )
{
    if(self) {
        if( self->value )
        {
            cson_free(self->value,"cson_value_destroy_free()");
        }
        *self = cson_value_undef;
    }
}



/**
   A key/value pair collection.

   Each of these objects owns its key/value pointers, and they
   are cleaned up by cson_kvp_clean().
*/
struct cson_kvp
{
    cson_string * key;
    cson_value * value;
};
#define cson_kvp_empty_m {NULL,NULL}
static const cson_kvp cson_kvp_empty = cson_kvp_empty_m;

/** @def CSON_OBJECT_PROPS_SORT

   If CSON_OBJECT_PROPS_SORT is set to a true value then
   qsort() and bsearch() are used to sort (upon insertion)
   and search cson_object::kvp property lists. This costs us
   a re-sort on each insertion but searching is O(log n)
   average/worst case (and O(1) best-case).

   i'm not yet convinced that the overhead of the qsort() justifies
   the potentially decreased search times - it has not been
   measured. Object property lists tend to be relatively short in
   JSON, and a linear search which uses the cson_string::length
   property as a quick check is quite fast when one compares it with
   the sort overhead required by the bsearch() approach.
*/
#define CSON_OBJECT_PROPS_SORT 0

/** @def CSON_OBJECT_PROPS_SORT_USE_LENGTH

    Don't use this - i'm not sure that it works how i'd like.

    If CSON_OBJECT_PROPS_SORT_USE_LENGTH is true then
    we use string lengths as quick checks when sorting
    property keys. This leads to a non-intuitive sorting
    order but "should" be faster.

    This is ignored if CSON_OBJECT_PROPS_SORT is false.

*/
#define CSON_OBJECT_PROPS_SORT_USE_LENGTH 0

#if CSON_OBJECT_PROPS_SORT

#if 0
/* i would prefer case-insensitive sorting but keys need
   to be case-sensitive for search purposes.

   TODO? write a comparitor which reverses the default
   sort order of upper/lower-case. The current behaviour
   is a bit non-intuitive, where 'Z' < 'a'.
*/
static int cson_kvp_strcmp( char const * l, char const * r )
{
    char cl;
    char cr;
    for( ; *l && *r; ++l, ++r )
    {
        cl = tolower(*l);
        cr = tolower(*r);
        if( cl < cr ) return -1;
        else if( cl > cr ) return 1;
    }
    if( !*l && !*r ) return 0;
    else return (*l) ? 1 : -1;
}
#endif

/**
   cson_kvp comparator for use with qsort(). ALMOST compares with
   strcmp() semantics, but it uses the strings' lengths as a quicker
   approach. This might give non-intuitive results, but it's faster.
 */
static int cson_kvp_cmp( void const * lhs, void const * rhs )
{
    cson_kvp const * lk = *((cson_kvp const * const*)lhs);
    cson_kvp const * rk = *((cson_kvp const * const*)rhs);
    cson_string const * l = lk->key;
    cson_string const * r = rk->key;
#if CSON_OBJECT_PROPS_SORT_USE_LENGTH
    if( l->length < r->length ) return -1;
    else if( l->length > r->length ) return 1;
    else return strcmp( cson_string_cstr( l ), cson_string_cstr( r ) );
#else
    return strcmp( cson_string_cstr( l ),
                   cson_string_cstr( r ) );
#endif /*CSON_OBJECT_PROPS_SORT_USE_LENGTH*/
}
#endif /*CSON_OBJECT_PROPS_SORT*/


#if CSON_OBJECT_PROPS_SORT
/**
   A bsearch() comparison function which requires that lhs be a (char
   const *) and rhs be-a (cson_kvp const * const *). It compares lhs
   to rhs->key's value, using strcmp() semantics.
 */
static int cson_kvp_cmp_vs_cstr( void const * lhs, void const * rhs )
{
    char const * lk = (char const *)lhs;
    cson_kvp const * rk =
        *((cson_kvp const * const*)rhs)
        ;
#if CSON_OBJECT_PROPS_SORT_USE_LENGTH
    unsigned int llen = strlen(lk);
    if( llen < rk->key->length ) return -1;
    else if( llen > rk->key->length ) return 1;
    else return strcmp( lk, cson_string_cstr( rk->key ) );
#else
    return strcmp( lk, cson_string_cstr( rk->key ) );
#endif /*CSON_OBJECT_PROPS_SORT_USE_LENGTH*/
}
#endif /*CSON_OBJECT_PROPS_SORT*/


struct cson_kvp_list
{
    cson_kvp ** list;
    unsigned int count;
    unsigned int alloced;
};
typedef struct cson_kvp_list cson_kvp_list;
#define cson_kvp_list_empty_m {NULL/*list*/,0/*count*/,0/*alloced*/}
static const cson_kvp_list cson_kvp_list_empty = cson_kvp_list_empty_m;

struct cson_object
{
    cson_kvp_list kvp;
};
/*typedef struct cson_object cson_object;*/
#define cson_object_empty_m { cson_kvp_list_empty_m/*kvp*/ }
static const cson_object cson_object_empty = cson_object_empty_m;

struct cson_value_list
{
    cson_value ** list;
    unsigned int count;
    unsigned int alloced;
};
typedef struct cson_value_list cson_value_list;
#define cson_value_list_empty_m {NULL/*list*/,0/*count*/,0/*alloced*/}
static const cson_value_list cson_value_list_empty = cson_value_list_empty_m;

struct cson_array
{
    cson_value_list list;
};
/*typedef struct cson_array cson_array;*/
#define cson_array_empty_m { cson_value_list_empty_m/*list*/ }
static const cson_array cson_array_empty = cson_array_empty_m;


struct cson_parser
{
    JSON_parser p;
    cson_value * root;
    cson_value * node;
    cson_array stack;
    cson_string * ckey;
    int errNo;
    unsigned int totalKeyCount;
    unsigned int totalValueCount;
};
typedef struct cson_parser cson_parser;
static const cson_parser cson_parser_empty = {
NULL/*p*/,
NULL/*root*/,
NULL/*node*/,
cson_array_empty_m/*stack*/,
NULL/*ckey*/,
0/*errNo*/,
0/*totalKeyCount*/,
0/*totalValueCount*/
};

#if 1
/* The following funcs are declared in generated code (cson_lists.h),
   but we need early access to their decls for the Amalgamation build.
*/
static unsigned int cson_value_list_reserve( cson_value_list * self, unsigned int n );
static unsigned int cson_kvp_list_reserve( cson_kvp_list * self, unsigned int n );
static int cson_kvp_list_append( cson_kvp_list * self, cson_kvp * cp );
static void cson_kvp_list_clean( cson_kvp_list * self,
                                 void (*cleaner)(cson_kvp * obj) );
#if 0
static int cson_value_list_append( cson_value_list * self, cson_value * cp );
static void cson_value_list_clean( cson_value_list * self, void (*cleaner)(cson_value * obj));
static int cson_kvp_list_visit( cson_kvp_list * self,
                                int (*visitor)(cson_kvp * obj, void * visitorState ),
                                void * visitorState );
static int cson_value_list_visit( cson_value_list * self,
                                  int (*visitor)(cson_value * obj, void * visitorState ),
                                  void * visitorState );
#endif
#endif
    
#if 0
#  define LIST_T cson_value_list
#  define VALUE_T cson_value *
#  define VALUE_T_IS_PTR 1
#  define LIST_T cson_kvp_list
#  define VALUE_T cson_kvp *
#  define VALUE_T_IS_PTR 1
#else
#endif

/*
  Reminders to self:

  - 20110126: moved cson_value_new() and cson_value_set_xxx() out of the
  public API because:

  a) They can be easily mis-used to cause memory leaks, even when used in
  a manner which seems relatively intuitive.

  b) Having them in the API prohibits us from eventually doing certain
  allocation optimizations like not allocating Booleans,
  Integer/Doubles with the value 0, or empty Strings. The main problem
  is that cson_value_set_xxx() cannot be implemented properly if we
  add that type of optimization.
*/

/**
   Allocates a new value with the "undefined" value and transfers
   ownership of it to the caller. Use The cson_value_set_xxx() family
   of functions to assign a typed value to it. It must eventually be
   destroyed, by the caller or its owning container, by passing it to
   cson_value_free().

   Returns NULL on allocation error.

   @see cson_value_new_array()
   @see cson_value_new_object()
   @see cson_value_new_string()
   @see cson_value_new_integer()
   @see cson_value_new_double()
   @see cson_value_new_bool()
   @see cson_value_free()
*/
static cson_value * cson_value_new();
/**
   Cleans any existing contents of val and sets its new value
   to the special NULL value.

   Returns 0 on success.

*/
#if 0
static int cson_value_set_null( cson_value * val );
#endif
/**
   Cleans any existing contents of val and sets its new value
   to v.

   Returns 0 on success.

*/
#if 0
static int cson_value_set_bool( cson_value * val, char v );
#endif
/**
   Cleans any existing contents of val and sets its new value
   to v.

   Returns 0 on success.

*/
static int cson_value_set_integer( cson_value * val, cson_int_t v );
/**
   Cleans any existing contents of val and sets its new value
   to v.

   Returns 0 on success.
*/
static int cson_value_set_double( cson_value * val, cson_double_t v );

/**
   Cleans any existing contents of val and sets its new value to
   str. On success, ownership of str is passed on to val. On error
   ownership is not changed.

   Returns 0 on success.

   If str is NULL, (!*str), or (!len) then this function does not
   allocate any memory for a new string, and cson_value_fetch_string()
   will return an empty string as opposed to a NULL string.
*/
static int cson_value_set_string( cson_value * val, char const * str, unsigned int len );


cson_value * cson_value_new()
{
    cson_value * v = (cson_value *)cson_malloc(sizeof(cson_value),"cson_value_new");
    if( v ) *v = cson_value_undef;
    return v;
}


void cson_value_free(cson_value *v)
{
    cson_refcount_decr( v );
}

#if 0 /* we might actually want this later on. */
/** Returns true if v is not NULL and has the given type ID. */
static char cson_value_is_a( cson_value const * v, cson_type_id is )
{
    return (v && v->api && (v->api->typeID == is)) ? 1 : 0;
}
#endif

#if 0
cson_type_id cson_value_type_id( cson_value const * v )
{
    return (v && v->api) ? v->api->typeID : CSON_TYPE_UNDEF;
}
#endif

char cson_value_is_undef( cson_value const * v )
{
    /**
       This special-case impl is needed because the underlying
       (generic) list operations do not know how to populate
       new entries
     */
    return ( !v || !v->api || (v->api==&cson_value_api_undef))
        ? 1 : 0;
}
#define ISA(T,TID) char cson_value_is_##T( cson_value const * v ) {       \
        /*return (v && v->api) ? cson_value_is_a(v,CSON_TYPE_##TID) : 0;*/ \
        return (v && (v->api == &cson_value_api_##T)) ? 1 : 0; \
    } static const char bogusPlaceHolderForEmacsIndention##TID = CSON_TYPE_##TID
ISA(null,NULL);
ISA(bool,BOOL);
ISA(integer,INTEGER);
ISA(double,DOUBLE);
ISA(string,STRING);
ISA(array,ARRAY);
ISA(object,OBJECT);
#undef ISA
char cson_value_is_number( cson_value const * v )
{
    return cson_value_is_integer(v) || cson_value_is_double(v);
}


void cson_value_clean( cson_value * val )
{
    if( val && val->api && val->api->cleanup )
    {
        if( ! cson_value_is_builtin( val ) )
        {
            cson_counter_t const rc = val->refcount;
            val->api->cleanup(val);
            *val = cson_value_undef;
            val->refcount = rc;
        }
    }
}

static void cson_value_destroy_integer( cson_value * self )
{
    if( self )
    {
#if !CSON_VOID_PTR_IS_BIG
        cson_free(self->value,"cson_int_t");
#endif
        *self = cson_value_empty;
    }    
}
static int cson_value_set_integer( cson_value * val, cson_int_t v )
{
    if( ! val ) return cson_rc.ArgError;
    else
    {
#if CSON_VOID_PTR_IS_BIG
        cson_value_clean( val );
        val->value = (void *)v;
#else
        cson_int_t * iv = NULL;
        cson_value_clean( val );
        iv = (cson_int_t*)cson_malloc(sizeof(cson_int_t), "cson_int_t");
        if( ! iv ) return cson_rc.AllocError;
        *iv = v;
        val->value = iv;
#endif
        val->api = &cson_value_api_integer;
        return 0;
    }
}

static int cson_value_set_double( cson_value * val, cson_double_t v )
{
    if( ! val ) return cson_rc.ArgError;
    else
    {
        cson_double_t * rv = NULL;
        cson_value_clean( val );
        val->api = &cson_value_api_double;
        if( 0.0 != v )
        {
            /*
              Reminder: we can't re-use val if it alreay is-a double
              because we have no reference counting.
            */
            rv = (cson_double_t*)cson_malloc(sizeof(cson_double_t),"double");
            if( ! rv ) return cson_rc.AllocError;
        }
        if(NULL != rv) *rv = v;
        val->value = rv;
        return 0;
    }
}

static cson_string * cson_string_shared_empty()
{
    /**
       We have code in place elsewhere to avoid that
       cson_string_cstr(&bob) and cson_string_str(&bob) will misbehave
       by accessing the bytes directly after bob (which are undefined
       in this case).
    */
#if 0
    static cson_string bob[2] = {cson_string_empty_m,
                                 cson_string_empty_m/*trick to 0-init bob[0]'s tail*/};
    return &bob[0];
#else
    static cson_string bob = cson_string_empty_m;
    return &bob;
#endif
}

static int cson_value_set_string( cson_value * val, char const * str, unsigned int len )
{
    cson_string * jstr = NULL;
    if( ! val ) return cson_rc.ArgError;
    cson_value_clean( val );
    val->api = &cson_value_api_string;
    if( !str || !*str || !len )
    {
        val->value = cson_string_shared_empty();
        return 0;
    }
    else
    {
        jstr = cson_string_alloc( len );
        if( NULL == jstr ) return cson_rc.AllocError;
        else
        {
            if( len )
            {
                char * dest = cson_string_str( jstr );
                val->value = jstr;
                strncpy( dest, str, len );
            }
            /* else it's the empty string special value */
            return 0;
        }
    }
}


static cson_value * cson_value_array_alloc()
{
    cson_value * v = (cson_value*)cson_malloc(sizeof(cson_value),"cson_value_array");
    if( NULL != v )
    {
        cson_array * ar = (cson_array *)cson_malloc(sizeof(cson_array),"cson_array");
        if( ! ar )
        {
            cson_free(v,"cson_array");
            v = NULL;
        }
        else
        {
            *ar = cson_array_empty;
            *v = cson_value_array_empty;
            v->value = ar;
        }
    }
    return v;
}

static cson_value * cson_value_object_alloc()
{
    cson_value * v = (cson_value*)cson_malloc(sizeof(cson_value),"cson_value_object");
    if( NULL != v )
    {
        cson_object * obj = (cson_object*)cson_malloc(sizeof(cson_object),"cson_value");
        if( ! obj )
        {
            cson_free(v,"cson_value_object");
            v = NULL;
        }
        else
        {
            *obj = cson_object_empty;
            *v = cson_value_object_empty;
            v->value = obj;
        }
    }
    return v;
}

cson_value * cson_value_new_object()
{
    return cson_value_object_alloc();
}

cson_value * cson_value_new_array()
{
    return cson_value_array_alloc();
}

/**
   Frees kvp->key and kvp->value and sets them to NULL, but does not free
   kvp. If !kvp then this is a no-op.
*/
static void cson_kvp_clean( cson_kvp * kvp )
{
    if( kvp )
    {
        if(kvp->key)
        {
            cson_free(kvp->key,"cson_kvp::key");
            kvp->key = NULL;
        }
        if(kvp->value)
        {
            cson_value_free( kvp->value );
            kvp->value = NULL;
        }
    }
}

cson_string const * cson_kvp_key( cson_kvp const * kvp )
{
    return kvp ? kvp->key : NULL;
}
cson_value * cson_kvp_value( cson_kvp const * kvp )
{
    return kvp ? kvp->value : NULL;
}


/**
   Calls cson_kvp_clean(kvp) and then frees kvp.
*/
static void cson_kvp_free( cson_kvp * kvp )
{
    if( kvp )
    {
        cson_kvp_clean(kvp);
        cson_free(kvp,"cson_kvp");
    }
}

/**
   cson_value_api::destroy_value() impl for Object
   values. Cleans up self-owned memory and overwrites
   self to have the undefined value, but does not
   free self.

   If self->value == cson_string_shared_empty()
   then this function does not actually free it.
*/
static void cson_value_destroy_string( cson_value * self )
{
    if(self && self->value) {
        cson_string * obj = (cson_string *)self->value;
        if( obj != cson_string_shared_empty() )
        {
            cson_free(self->value,"cson_string");
        }
        *self = cson_value_undef;
    }
}


/**
   cson_value_api::destroy_value() impl for Object
   values. Cleans up self-owned memory and overwrites
   self to have the undefined value, but does not
   free self.
*/
static void cson_value_destroy_object( cson_value * self )
{
    if(self && self->value) {
        cson_object * obj = (cson_object *)self->value;
        assert( self->value == obj );
        cson_kvp_list_clean( &obj->kvp, cson_kvp_free );
        cson_free(self->value,"cson_object");
        *self = cson_value_undef;
    }
}

/**
   Cleans up the contents of ar->list, but does not free ar.

   After calling this, ar will have a length of 0.

   If properlyCleanValues is 1 then cson_value_free() is called on
   each non-NULL item, otherwise the outer list is destroyed but the
   individual items are assumed to be owned by someone else and are
   not freed.
*/
static void cson_array_clean( cson_array * ar, char properlyCleanValues )
{
    if( ar )
    {
        unsigned int i = 0;
        cson_value * val = NULL;
        for( ; i < ar->list.count; ++i )
        {
            val = ar->list.list[i];
            if(val)
            {
                ar->list.list[i] = NULL;
                if( properlyCleanValues )
                {
                    cson_value_free( val );
                }
            }
        }
        cson_value_list_reserve(&ar->list,0);
        ar->list = cson_value_list_empty
            /* Pedantic note: reserve(0) already clears the list-specific
               fields, but we do this just in case we ever add new fields
               to cson_value_list which are not used in the reserve() impl.
             */
            ;
    }
}

/**
   cson_value_api::destroy_value() impl for Array
   values. Cleans up self-owned memory and overwrites
   self to have the undefined value, but does not
   free self.
*/
static void cson_value_destroy_array( cson_value * self )
{
    cson_array * ar = cson_value_get_array(self);
    if(ar) {
        assert( self->value == ar );
        cson_array_clean( ar, 1 );
        cson_free(ar,"cson_array");
        *self = cson_value_undef;
    }
}


#if 0
static void cson_kvp_list_item_clean( void * kvp );
static void cson_value_list_item_clean( void * val );
void cson_value_list_item_clean( void * val_ )
{
    cson_value * val = (cson_value*)val_;
    if( val )
    {
        cson_value_clean(val);
    }
}
void cson_kvp_list_item_clean( void * val )
{
    cson_kvp * kvp = (cson_kvp *)val;
    if( kvp )
    {
        cson_free(kvp->key,"cson_kvp::key");
        cson_value_clean( &kvp->value );
    }
}
#endif

int cson_buffer_fill_from( cson_buffer * dest, cson_data_source_f src, void * state )
{
    int rc;
    enum { BufSize = 1024 * 4 };
    char rbuf[BufSize];
    size_t total = 0;
    unsigned int rlen = 0;
    if( ! dest || ! src ) return cson_rc.ArgError;
    dest->used = 0;
    while(1)
    {
        rlen = BufSize;
        rc = src( state, rbuf, &rlen );
        if( rc ) break;
        total += rlen;
        if( dest->capacity < (total+1) )
        {
            rc = cson_buffer_reserve( dest, total + 1);
            if( 0 != rc ) break;
        }
        memcpy( dest->mem + dest->used, rbuf, rlen );
        dest->used += rlen;
        if( rlen < BufSize ) break;
    }
    if( !rc && dest->used )
    {
        assert( dest->used < dest->capacity );
        dest->mem[dest->used] = 0;
    }
    return rc;
}

int cson_data_source_FILE( void * state, void * dest, unsigned int * n )
{
    FILE * f = (FILE*) state;
    if( ! state || ! n || !dest ) return cson_rc.ArgError;
    else if( !*n ) return cson_rc.RangeError;
    *n = (unsigned int)fread( dest, 1, *n, f );
    if( !*n )
    {
        return feof(f) ? 0 : cson_rc.IOError;
    }
    return 0;
}

int cson_parse_FILE( cson_value ** tgt, FILE * src,
                     cson_parse_opt const * opt, cson_parse_info * err )
{
    return cson_parse( tgt, cson_data_source_FILE, src, opt, err );
}


int cson_value_fetch_bool( cson_value const * val, char * v )
{
    /**
       FIXME: move the to-bool operation into cson_value_api, like we
       do in the C++ API.
     */
    if( ! val || !val->api ) return cson_rc.ArgError;
    else
    {
        int rc = 0;
        char b = 0;
        switch( val->api->typeID )
        {
          case CSON_TYPE_ARRAY:
          case CSON_TYPE_OBJECT:
              b = 1;
              break;
          case CSON_TYPE_STRING: {
              char const * str = cson_string_cstr(cson_value_get_string(val));
              b = (str && *str) ? 1 : 0;
              break;
          }
          case CSON_TYPE_UNDEF:
          case CSON_TYPE_NULL:
              break;
          case CSON_TYPE_BOOL:
              b = (NULL==val->value) ? 0 : 1;
              break;
          case CSON_TYPE_INTEGER: {
              cson_int_t i = 0;
              cson_value_fetch_integer( val, &i );
              b = i ? 1 : 0;
              break;
          }
          case CSON_TYPE_DOUBLE: {
              cson_double_t d = 0.0;
              cson_value_fetch_double( val, &d );
              b = (0.0==d) ? 0 : 1;
              break;
          }
          default:
              rc = cson_rc.TypeError;
              break;
        }
        if( v ) *v = b;
        return rc;
    }
}

char cson_value_get_bool( cson_value const * val )
{
    char i = 0;
    cson_value_fetch_bool( val, &i );
    return i;
}

int cson_value_fetch_integer( cson_value const * val, cson_int_t * v )
{
    if( ! val || !val->api ) return cson_rc.ArgError;
    else
    {
        cson_int_t i = 0;
        int rc = 0;
        switch(val->api->typeID)
        {
            case CSON_TYPE_UNDEF: 
            case CSON_TYPE_NULL:
              i = 0;
              break;
            case CSON_TYPE_BOOL: {
              char b = 0;
              cson_value_fetch_bool( val, &b );
              i = b;
              break;
            }
            case CSON_TYPE_INTEGER: {
#if CSON_VOID_PTR_IS_BIG
                i = (cson_int_t)val->value;
#else
                cson_int_t const * x = (cson_int_t const *)val->value;
                i = x ? *x : 0;
#endif
                break;
            }
            case CSON_TYPE_DOUBLE: {
              cson_double_t d = 0.0;
              cson_value_fetch_double( val, &d );
              i = (cson_int_t)d;
              break;
            }
            case CSON_TYPE_STRING:
            case CSON_TYPE_ARRAY:
            case CSON_TYPE_OBJECT:
            default:
              break;
        }
        if(v) *v = i;
        return rc;
    }
}

cson_int_t cson_value_get_integer( cson_value const * val )
{
    cson_int_t i = 0;
    cson_value_fetch_integer( val, &i );
    return i;
}

int cson_value_fetch_double( cson_value const * val, cson_double_t * v )
{
    if( ! val || !val->api ) return cson_rc.ArgError;
    else
    {
        cson_double_t d = 0.0;
        int rc = 0;
        switch(val->api->typeID)
        {
          case CSON_TYPE_UNDEF: 
          case CSON_TYPE_NULL:
              d = 0;
              break;
          case CSON_TYPE_BOOL: {
              char b = 0;
              cson_value_fetch_bool( val, &b );
              d = b ? 1.0 : 0.0;
              break;
          }
          case CSON_TYPE_INTEGER: {
              cson_int_t i = 0;
              cson_value_fetch_integer( val, &i );
              d = i;
              break;
          }
          case CSON_TYPE_DOUBLE: {
              cson_double_t const* dv = (cson_double_t const *)val->value;
              d = dv ? *dv : 0.0;
              break;
          }
          default:
              rc = cson_rc.TypeError;
              break;
        }
        if(v) *v = d;
        return rc;
    }
}

cson_double_t cson_value_get_double( cson_value const * val )
{
    cson_double_t i = 0.0;
    cson_value_fetch_double( val, &i );
    return i;
}

int cson_value_fetch_string( cson_value const * val, cson_string const ** dest )
{
    if( ! val || ! dest ) return cson_rc.ArgError;
    else if( ! cson_value_is_string(val) ) return cson_rc.TypeError;
    else
    {
        if( dest ) *dest = (cson_string const *)val->value;
        return 0;
    }
}

cson_string const * cson_value_get_string( cson_value const * val )
{
    cson_string const * rc = NULL;
    cson_value_fetch_string( val, &rc );
    return rc;
}

char const * cson_value_get_cstr( cson_value const * val )
{
    return cson_string_cstr( cson_value_get_string(val) );
}

int cson_value_fetch_object( cson_value const * val, cson_object ** obj )
{
    if( ! val ) return cson_rc.ArgError;
    else if( ! cson_value_is_object(val) ) return cson_rc.TypeError;
    else
    {
        if(obj) *obj = (cson_object*)val->value;
        return 0;
    }
}
cson_object * cson_value_get_object( cson_value const * v )
{
    cson_object * obj = NULL;
    cson_value_fetch_object( v, &obj );
    return obj;
}

int cson_value_fetch_array( cson_value const * val, cson_array ** ar)
{
    if( ! val ) return cson_rc.ArgError;
    else if( ! cson_value_is_array(val) ) return cson_rc.TypeError;
    else
    {
        if(ar) *ar = (cson_array*)val->value;
        return 0;
    }
}

cson_array * cson_value_get_array( cson_value const * v )
{
    cson_array * ar = NULL;
    cson_value_fetch_array( v, &ar );
    return ar;
}

cson_kvp * cson_kvp_alloc()
{
    cson_kvp * kvp = (cson_kvp*)cson_malloc(sizeof(cson_kvp),"cson_kvp");
    if( kvp )
    {
        *kvp = cson_kvp_empty;
    }
    return kvp;
}



int cson_array_append( cson_array * ar, cson_value * v )
{
    if( !ar || !v ) return cson_rc.ArgError;
    else if( (ar->list.count+1) < ar->list.count ) return cson_rc.RangeError;
    else
    {
        if( !ar->list.alloced || (ar->list.count == ar->list.alloced-1))
        {
            unsigned int const n = ar->list.count ? (ar->list.count*2) : 7;
            if( n > cson_value_list_reserve( &ar->list, n ) )
            {
                return cson_rc.AllocError;
            }
        }
        return cson_array_set( ar, ar->list.count, v );
    }
}

#if 0
/**
   Removes and returns the last value from the given array,
   shrinking its size by 1. Returns NULL if ar is NULL,
   ar->list.count is 0, or the element at that index is NULL.
   

   If removeRef is true then cson_value_free() is called to remove
   ar's reference count for the value. In that case NULL is returned,
   even if the object still has live references. If removeRef is false
   then the caller takes over ownership of that reference count point.

   If removeRef is false then the caller takes over ownership
   of the return value, otherwise ownership is effectively
   determined by any remaining references for the returned
   value.
*/
static cson_value * cson_array_pop_back( cson_array * ar,
                                         char removeRef )
{
    if( !ar ) return NULL;
    else if( ! ar->list.count ) return NULL;
    else
    {
        unsigned int const ndx = --ar->list.count;
        cson_value * v = ar->list.list[ndx];
        ar->list.list[ndx] = NULL;
        if( removeRef )
        {
            cson_value_free( v );
            v = NULL;
        }
        return v;
    }
}
#endif

cson_value * cson_value_new_bool( char v )
{
    return v ? &CSON_SPECIAL_VALUES[CSON_VAL_TRUE] : &CSON_SPECIAL_VALUES[CSON_VAL_FALSE];
}

cson_value * cson_value_true()
{
    return &CSON_SPECIAL_VALUES[CSON_VAL_TRUE];
}
cson_value * cson_value_false()
{
    return &CSON_SPECIAL_VALUES[CSON_VAL_FALSE];
}

cson_value * cson_value_null()
{
    return &CSON_SPECIAL_VALUES[CSON_VAL_NULL];
}

cson_value * cson_value_new_integer( cson_int_t v )
{
    if( 0 == v ) return &CSON_SPECIAL_VALUES[CSON_VAL_INT_0];
    else
    {
        cson_value * c = cson_value_new();
        if( c )
        {
            if( 0 != cson_value_set_integer( c, v ) )
            {
                cson_value_free(c);
                c = NULL;
            }
        }
        return c;
    }
}

cson_value * cson_value_new_double( cson_double_t v )
{
    if( 0.0 == v ) return &CSON_SPECIAL_VALUES[CSON_VAL_DBL_0];
    else
    {
        cson_value * c = cson_value_new();
        if( c )
        {
            if( 0 != cson_value_set_double( c, v ) )
            {
                cson_value_free(c);
                c = NULL;
            }
        }
        return c;
    }
}
cson_value * cson_value_new_string( char const * str, unsigned int len )
{
    if( !str || !len ) return &CSON_SPECIAL_VALUES[CSON_VAL_STR_EMPTY];
    else
    {
        cson_value * c = cson_value_new();
        if( c )
        {
            if( 0 != cson_value_set_string( c, str, len ) )
            {
                cson_value_free(c);
                c = NULL;
            }
        }
        return c;
    }
}

int cson_array_value_fetch( cson_array const * ar, unsigned int pos, cson_value ** v )
{
    if( !ar) return cson_rc.ArgError;
    if( pos >= ar->list.count ) return cson_rc.RangeError;
    else
    {
        if(v) *v = ar->list.list[pos];
        return 0;
    }
}

cson_value * cson_array_get( cson_array const * ar, unsigned int pos )
{
    cson_value *v = NULL;
    cson_array_value_fetch(ar, pos, &v);
    return v;
}

int cson_array_length_fetch( cson_array const * ar, unsigned int * v )
{
    if( ! ar || !v ) return cson_rc.ArgError;
    else
    {
        if(v) *v = ar->list.count;
        return 0;
    }
}

unsigned int cson_array_length_get( cson_array const * ar )
{
    unsigned int i = 0;
    cson_array_length_fetch(ar, &i);
    return i;
}

int cson_array_reserve( cson_array * ar, unsigned int size )
{
    if( ! ar ) return cson_rc.ArgError;
    else if( size <= ar->list.alloced )
    {
        /* We don't want to introduce a can of worms by trying to
           handle the cleanup from here.
        */
        return 0;
    }
    else
    {
        return (ar->list.alloced > cson_value_list_reserve( &ar->list, size ))
            ? cson_rc.AllocError
            : 0
            ;
    }
}

int cson_array_set( cson_array * ar, unsigned int ndx, cson_value * v )
{
    if( !ar || !v ) return cson_rc.ArgError;
    else if( (ndx+1) < ndx) /* overflow */return cson_rc.RangeError;
    else
    {
        unsigned const int len = cson_value_list_reserve( &ar->list, ndx+1 );
        if( len <= ndx ) return cson_rc.AllocError;
        else
        {
            cson_value * old = ar->list.list[ndx];
            if( old )
            {
                if(old == v) return 0;
                else cson_value_free(old);
            }
            cson_refcount_incr( v );
            ar->list.list[ndx] = v;
            if( ndx >= ar->list.count )
            {
                ar->list.count = ndx+1;
            }
            return 0;
        }
    }
}

/** @internal

   Searchs for the given key in the given object.

   Returns the found item on success, NULL on error.  If ndx is not
   NULL, it is set to the index (in obj->kvp.list) of the found
   item. *ndx is not modified if no entry is found.
*/
static cson_kvp * cson_object_search_impl( cson_object const * obj, char const * key, unsigned int * ndx )
{
    if( obj && key && *key && obj->kvp.count)
    {
#if CSON_OBJECT_PROPS_SORT
        cson_kvp ** s = (cson_kvp**)
            bsearch( key, obj->kvp.list,
                     obj->kvp.count, sizeof(cson_kvp*),
                     cson_kvp_cmp_vs_cstr );
        if( ndx && s )
        { /* index of found record is required by
             cson_object_unset(). Calculate the offset based on s...*/
#if 0
            *ndx = (((unsigned char const *)s - ((unsigned char const *)obj->kvp.list))
                   / sizeof(cson_kvp*));
#else
            *ndx = s - obj->kvp.list;
#endif
        }
        return s ? *s : NULL;
#else
        cson_kvp_list const * li = &obj->kvp;
        unsigned int i = 0;
        cson_kvp * kvp;
        const unsigned int klen = strlen(key);
        for( ; i < li->count; ++i )
        {
            kvp = li->list[i];
            assert( kvp && kvp->key );
            if( kvp->key->length != klen ) continue;
            else if(0==strcmp(key,cson_string_cstr(kvp->key)))
            {
                if(ndx) *ndx = i;
                return kvp;
            }
        }
#endif
    }
    return NULL;
}

cson_value * cson_object_get( cson_object const * obj, char const * key )
{
    cson_kvp * kvp = cson_object_search_impl( obj, key, NULL );
    return kvp ? kvp->value : NULL;
}

#if CSON_OBJECT_PROPS_SORT
static void cson_object_sort_props( cson_object * obj )
{
    assert( NULL != obj );
    if( obj->kvp.count )
    {
        qsort( obj->kvp.list, obj->kvp.count, sizeof(cson_kvp*),
               cson_kvp_cmp );
    }

}
#endif    

int cson_object_unset( cson_object * obj, char const * key )
{
    if( ! obj || !key || !*key ) return cson_rc.ArgError;
    else
    {
        unsigned int ndx = 0;
        cson_kvp * kvp = cson_object_search_impl( obj, key, &ndx );
        if( ! kvp )
        {
            return cson_rc.NotFoundError;
        }
        assert( obj->kvp.count > 0 );
        assert( obj->kvp.list[ndx] == kvp );
        cson_kvp_free( kvp );
        obj->kvp.list[ndx] = NULL;
        { /* if my brain were bigger i'd use memmove(). */
            unsigned int i = ndx;
            for( ; i < obj->kvp.count; ++i )
            {
                obj->kvp.list[i] =
                    (i < (obj->kvp.alloced-1))
                    ? obj->kvp.list[i+1]
                    : NULL;
            }
        }
        obj->kvp.list[--obj->kvp.count] = NULL;
#if CSON_OBJECT_PROPS_SORT
        cson_object_sort_props( obj );
#endif
        return 0;
    }
}

int cson_object_set( cson_object * obj, char const * key, cson_value * v )
{
    if( ! obj || !key || !*key ) return cson_rc.ArgError;
    else if( NULL == v )
    {
        return cson_object_unset( obj, key );
    }
    else
    {
        cson_kvp * kvp = cson_object_search_impl( obj, key, NULL );
        if( kvp )
        { /* "I told 'em we've already got one!" */
            if( v == kvp->value ) return 0 /* actually a usage error */;
            else
            {
                cson_value_free( kvp->value );
                cson_refcount_incr( v );
                kvp->value = v;
                return 0;
            }
        }
        if( !obj->kvp.alloced || (obj->kvp.count == obj->kvp.alloced-1))
        {
            unsigned int const n = obj->kvp.count ? (obj->kvp.count*2) : 7;
            if( n > cson_kvp_list_reserve( &obj->kvp, n ) )
            {
                return cson_rc.AllocError;
            }
        }
        { /* insert new item... */
            int rc = 0;
            cson_string * keycp = cson_string_strdup(key, strlen(key));
            if( ! keycp )
            {
                return cson_rc.AllocError;
            }
            kvp = cson_kvp_alloc();
            if( ! kvp )
            {
                cson_free(keycp,"cson_parser::key");
                return cson_rc.AllocError;
            }
            kvp->key = keycp /* transfer ownership */;
            rc = cson_kvp_list_append( &obj->kvp, kvp );
            if( 0 != rc )
            {
                cson_kvp_free(kvp);
            }
            else
            {
                cson_refcount_incr( v );
                kvp->value = v /* transfer ownership */;
#if CSON_OBJECT_PROPS_SORT
                cson_object_sort_props( obj );
#endif
            }
            return 0;
        }
    }
}

cson_value * cson_object_take( cson_object * obj, char const * key )
{
    if( ! obj || !key || !*key ) return NULL;
    else
    {
        /* FIXME: this is 90% identical to cson_object_unset(),
           only with different refcount handling.
           Consolidate them.
        */
        unsigned int ndx = 0;
        cson_kvp * kvp = cson_object_search_impl( obj, key, &ndx );
        cson_value * rc = NULL;
        if( ! kvp )
        {
            return NULL;
        }
        assert( obj->kvp.count > 0 );
        assert( obj->kvp.list[ndx] == kvp );
        rc = kvp->value;
        assert( rc );
        kvp->value = NULL;
        cson_kvp_free( kvp );
        assert( rc->refcount > 0 );
        --rc->refcount;
        obj->kvp.list[ndx] = NULL;
        { /* if my brain were bigger i'd use memmove(). */
            unsigned int i = ndx;
            for( ; i < obj->kvp.count; ++i )
            {
                obj->kvp.list[i] =
                    (i < (obj->kvp.alloced-1))
                    ? obj->kvp.list[i+1]
                    : NULL;
            }
        }
        obj->kvp.list[--obj->kvp.count] = NULL;
#if CSON_OBJECT_PROPS_SORT
        cson_object_sort_props( obj );
#endif
        return rc;
    }
}
/** @internal

   If p->node is-a Object then value is inserted into the object
   using p->key. In any other case cson_rc.InternalError is returned.

   Returns cson_rc.AllocError if an allocation fails.

   Returns 0 on success. On error, parsing must be ceased immediately.
   
   Ownership of val is ALWAYS TRANSFERED to this function. If this
   function fails, val will be cleaned up and destroyed. (This
   simplifies error handling in the core parser.)
*/
static int cson_parser_set_key( cson_parser * p, cson_value * val )
{
    assert( p && val );

    if( p->ckey && cson_value_is_object(p->node) )
    {
        int rc;
        cson_object * obj = cson_value_get_object(p->node);
        cson_kvp * kvp = NULL;
        assert( obj && (p->node->value == obj) );
        /**
           FIXME? Use cson_object_set() instead of our custom
           finagling with the object? We do it this way to avoid an
           extra alloc/strcpy of the key data.
        */
        if( !obj->kvp.alloced || (obj->kvp.count == obj->kvp.alloced-1))
        {
            if( obj->kvp.alloced > cson_kvp_list_reserve( &obj->kvp, obj->kvp.count ? (obj->kvp.count*2) : 5 ) )
            {
                cson_value_free(val);
                return cson_rc.AllocError;
            }
        }
        kvp = cson_kvp_alloc();
        if( ! kvp )
        {
            cson_value_free(val);
            return cson_rc.AllocError;
        }
        kvp->key = p->ckey/*transfer ownership*/;
        p->ckey = NULL;
        kvp->value = val;
        cson_refcount_incr( val );
        rc = cson_kvp_list_append( &obj->kvp, kvp );
        if( 0 != rc )
        {
            cson_kvp_free( kvp );
        }
        else
        {
            ++p->totalValueCount;
        }
        return rc;
    }
    else
    {
        if(val) cson_value_free(val);
        return p->errNo = cson_rc.InternalError;
    }

}

/** @internal

    Pushes val into the current object/array parent node, depending on the
    internal state of the parser.

    Ownership of val is always transfered to this function, regardless of
    success or failure.

    Returns 0 on success. On error, parsing must be ceased immediately.
*/
static int cson_parser_push_value( cson_parser * p, cson_value * val )
{
    if( p->ckey )
    { /* we're in Object mode */
        assert( cson_value_is_object( p->node ) );
        return cson_parser_set_key( p, val );
    }
    else if( cson_value_is_array( p->node ) )
    { /* we're in Array mode */
        cson_array * ar = cson_value_get_array( p->node );
        int rc;
        assert( ar && (ar == p->node->value) );
        rc = cson_array_append( ar, val );
        if( 0 != rc )
        {
            cson_value_free(val);
        }
        else
        {
            ++p->totalValueCount;
        }
        return rc;
    }
    else
    { /* WTF? */
        assert( 0 && "Internal error in cson_parser code" );
        return p->errNo = cson_rc.InternalError;
    }
}

/**
   Callback for JSON_parser API. Reminder: it returns 0 (meaning false)
   on error!
*/
static int cson_parse_callback( void * cx, int type, JSON_value const * value )
{
    cson_parser * p = (cson_parser *)cx;
    int rc = 0;
#define ALLOC_V(T,V) cson_value * v = cson_value_new_##T(V); if( ! v ) { rc = cson_rc.AllocError; break; }
    switch(type) {
      case JSON_T_ARRAY_BEGIN:
      case JSON_T_OBJECT_BEGIN: {
          cson_value * obja = (JSON_T_ARRAY_BEGIN == type)
              ? cson_value_new_array()
              : cson_value_new_object();
          if( ! obja )
          {
              p->errNo = cson_rc.AllocError;
              return 0;
          }
          if( 0 != rc ) break;
          if( ! p->root )
          {
              p->root = p->node = obja;
              rc = cson_array_append( &p->stack, obja );
              if( 0 != rc )
              { /* work around a (potential) corner case in the cleanup code. */
                  cson_value_free( p->root );
                  p->root = NULL;
              }
              else
              {
                  cson_refcount_incr( p->root )
                      /* simplifies cleanup later on. */
                      ;
                  ++p->totalValueCount;
              }
          }
          else
          {
              rc = cson_array_append( &p->stack, obja );
              if( 0 == rc ) rc = cson_parser_push_value( p, obja );
              if( 0 == rc ) p->node = obja;
          }
          break;
      }
      case JSON_T_ARRAY_END:
      case JSON_T_OBJECT_END: {
          if( 0 == p->stack.list.count )
          {
              rc = cson_rc.RangeError;
              break;
          }
#if CSON_OBJECT_PROPS_SORT
          if( cson_value_is_object(p->node) )
          {/* kludge: the parser uses custom cson_object property
              insertion as a malloc/strcpy-reduction optimization.
              Because of that, we have to sort the property list
              ourselves...
           */
              cson_object * obj = cson_value_get_object(p->node);
              assert( NULL != obj );
              cson_object_sort_props( obj );
          }
#endif

#if 1
          /* Reminder: do not use cson_array_pop_back( &p->stack )
             because that will clean up the object, and we don't want
             that.  We just want to forget this reference
             to it. The object is either the root or was pushed into
             an object/array in the parse tree (and is owned by that
             object/array).
          */
          --p->stack.list.count;
          assert( p->node == p->stack.list.list[p->stack.list.count] );
          cson_refcount_decr( p->node )
              /* p->node might be owned by an outer object but we
                 need to remove the list's reference. For the
                 root node we manually add a reference to
                 avoid a special case here. Thus when we close
                 the root node, its refcount is still 1.
              */;
          p->stack.list.list[p->stack.list.count] = NULL;
          if( p->stack.list.count )
          {
              p->node = p->stack.list.list[p->stack.list.count-1];
          }
          else
          {
              p->node = p->root;
          }
#else
          /*
             Causing a leak?
           */
          cson_array_pop_back( &p->stack, 1 );
          if( p->stack.list.count )
          {
              p->node = p->stack.list.list[p->stack.list.count-1];
          }
          else
          {
              p->node = p->root;
          }
          assert( p->node && (1==p->node->refcount) );
#endif
          break;
      }
      case JSON_T_INTEGER: {
          ALLOC_V(integer, value->vu.integer_value );
          rc = cson_parser_push_value( p, v );
          break;
      }
      case JSON_T_FLOAT: {
          ALLOC_V(double, value->vu.float_value );
          rc =  cson_parser_push_value( p, v );
          break;
      }
      case JSON_T_NULL: {
          rc = cson_parser_push_value( p, cson_value_null() );
          break;
      }
      case JSON_T_TRUE: {
          rc = cson_parser_push_value( p, cson_value_true() );
          break;
      }
      case JSON_T_FALSE: {
          rc = cson_parser_push_value( p, cson_value_false() );
          break;
      }
      case JSON_T_KEY: {
          assert(!p->ckey);
          p->ckey = cson_string_strdup( value->vu.str.value, value->vu.str.length );
          if( ! p->ckey )
          {
              rc = cson_rc.AllocError;
              break;
          }
          ++p->totalKeyCount;
          break;
      }
      case JSON_T_STRING: {
          cson_value * v = cson_value_new_string( value->vu.str.value, value->vu.str.length );
          rc = ( NULL == v ) 
            ? cson_rc.AllocError
            : cson_parser_push_value( p, v );
          break;
      }
      default:
          assert(0);
          rc = cson_rc.InternalError;
          break;
    }
#undef ALLOC_V
    return ((p->errNo = rc)) ? 0 : 1;
}


/**
   Converts a JSON_error code to one of the cson_rc values.
*/
static int cson_json_err_to_rc( JSON_error jrc )
{
    switch(jrc)
    {
      case JSON_E_NONE: return 0;
      case JSON_E_INVALID_CHAR: return cson_rc.Parse_INVALID_CHAR;
      case JSON_E_INVALID_KEYWORD: return cson_rc.Parse_INVALID_KEYWORD;
      case JSON_E_INVALID_ESCAPE_SEQUENCE: return cson_rc.Parse_INVALID_ESCAPE_SEQUENCE;
      case JSON_E_INVALID_UNICODE_SEQUENCE: return cson_rc.Parse_INVALID_UNICODE_SEQUENCE;
      case JSON_E_INVALID_NUMBER: return cson_rc.Parse_INVALID_NUMBER;
      case JSON_E_NESTING_DEPTH_REACHED: return cson_rc.Parse_NESTING_DEPTH_REACHED;
      case JSON_E_UNBALANCED_COLLECTION: return cson_rc.Parse_UNBALANCED_COLLECTION;
      case JSON_E_EXPECTED_KEY: return cson_rc.Parse_EXPECTED_KEY;
      case JSON_E_EXPECTED_COLON: return cson_rc.Parse_EXPECTED_COLON;
      case JSON_E_OUT_OF_MEMORY: return cson_rc.AllocError;
      default:
          return cson_rc.InternalError;
    }
}

/** @internal

   Cleans up all contents of p but does not free p.

   To properly take over ownership of the parser's root node on a
   successful parse:

   - Copy p->root's pointer and set p->root to NULL.
   - Eventually free up p->root with cson_value_free().
   
   If you do not set p->root to NULL, p->root will be freed along with
   any other items inserted into it (or under it) during the parsing
   process.
*/
static int cson_parser_clean( cson_parser * p )
{
    if( ! p ) return cson_rc.ArgError;
    else
    {
        if( p->p )
        {
            delete_JSON_parser(p->p);
            p->p = NULL;
        }
        cson_free( p->ckey, "cson_parser::key" );
        cson_array_clean( &p->stack, 1 );
        if( p->root )
        {
            cson_value_free( p->root );
        }
        *p = cson_parser_empty;
        return 0;
    }
}


int cson_parse( cson_value ** tgt, cson_data_source_f src, void * state,
                cson_parse_opt const * opt_, cson_parse_info * info_ )
{
    unsigned char ch[2] = {0,0};
    cson_parse_opt const opt = opt_ ? *opt_ : cson_parse_opt_empty;
    int rc = 0;
    unsigned int len = 1;
    cson_parse_info info = info_ ? *info_ : cson_parse_info_empty;
    cson_parser p = cson_parser_empty;
    if( ! tgt || ! src ) return cson_rc.ArgError;
    
    {
        JSON_config jopt = {0};
        init_JSON_config( &jopt );
        jopt.allow_comments = opt.allowComments;
        jopt.depth = opt.maxDepth;
        jopt.callback_ctx = &p;
        jopt.handle_floats_manually = 0;
        jopt.callback = cson_parse_callback;
        p.p = new_JSON_parser(&jopt);
        if( ! p.p )
        {
            return cson_rc.AllocError;
        }
    }

    do
    { /* FIXME: buffer the input in multi-kb chunks. */
        len = 1;
        ch[0] = 0;
        rc = src( state, ch, &len );
        if( 0 != rc ) break;
        else if( !len /* EOF */ ) break;
        ++info.length;
        if('\n' == ch[0])
        {
            ++info.line;
            info.col = 0;
        }
        if( ! JSON_parser_char(p.p, ch[0]) )
        {
            rc = cson_json_err_to_rc( JSON_parser_get_last_error(p.p) );
            if(0==rc) rc = p.errNo;
            if(0==rc) rc = cson_rc.InternalError;
            info.errorCode = rc;
            break;
        }
        if( '\n' != ch[0]) ++info.col;
    } while(1);
    if( info_ )
    {
        info.totalKeyCount = p.totalKeyCount;
        info.totalValueCount = p.totalValueCount;
        *info_ = info;
    }
    if( 0 != rc )
    {
        cson_parser_clean(&p);
        return rc;
    }
    if( ! JSON_parser_done(p.p) )
    {
        rc = cson_json_err_to_rc( JSON_parser_get_last_error(p.p) );
        cson_parser_clean(&p);
        if(0==rc) rc = p.errNo;
        if(0==rc) rc = cson_rc.InternalError;
    }
    else
    {
        cson_value * root = p.root;
        p.root = NULL;
        cson_parser_clean(&p);
        if( root )
        {
            assert( (1 == root->refcount) && "Detected memory mismanagement in the parser." );
            root->refcount = 0
                /* HUGE KLUDGE! Avoids having one too many references
                   in some client code, leading to a leak. Here we're
                   accommodating a memory management workaround in the
                   parser code which manually adds a reference to the
                   root node to keep it from being cleaned up
                   prematurely.
                */;
            *tgt = root;
        }
        else
        { /* then can happen on empty input. */
            rc = cson_rc.UnknownError;
        }
    }
    return rc;
}

/**
   The UTF code was originally taken from sqlite3's public-domain
   source code (http://sqlite.org), modified only slightly for use
   here. This code generates some "possible data loss" warnings on
   MSVC, but if this code is good enough for sqlite3 then it's damned
   well good enough for me, so we disable that warning for Windows
   builds.
*/

/*
** This lookup table is used to help decode the first byte of
** a multi-byte UTF8 character.
*/
static const unsigned char cson_utfTrans1[] = {
  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
  0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
  0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
  0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  0x00, 0x01, 0x02, 0x03, 0x00, 0x01, 0x00, 0x00
};


/*
** Translate a single UTF-8 character.  Return the unicode value.
**
** During translation, assume that the byte that zTerm points
** is a 0x00.
**
** Write a pointer to the next unread byte back into *pzNext.
**
** Notes On Invalid UTF-8:
**
**  *  This routine never allows a 7-bit character (0x00 through 0x7f) to
**     be encoded as a multi-byte character.  Any multi-byte character that
**     attempts to encode a value between 0x00 and 0x7f is rendered as 0xfffd.
**
**  *  This routine never allows a UTF16 surrogate value to be encoded.
**     If a multi-byte character attempts to encode a value between
**     0xd800 and 0xe000 then it is rendered as 0xfffd.
**
**  *  Bytes in the range of 0x80 through 0xbf which occur as the first
**     byte of a character are interpreted as single-byte characters
**     and rendered as themselves even though they are technically
**     invalid characters.
**
**  *  This routine accepts an infinite number of different UTF8 encodings
**     for unicode values 0x80 and greater.  It do not change over-length
**     encodings to 0xfffd as some systems recommend.
*/
#define READ_UTF8(zIn, zTerm, c)                           \
  c = *(zIn++);                                            \
  if( c>=0xc0 ){                                           \
    c = cson_utfTrans1[c-0xc0];                          \
    while( zIn!=zTerm && (*zIn & 0xc0)==0x80 ){            \
      c = (c<<6) + (0x3f & *(zIn++));                      \
    }                                                      \
    if( c<0x80                                             \
        || (c&0xFFFFF800)==0xD800                          \
        || (c&0xFFFFFFFE)==0xFFFE ){  c = 0xFFFD; }        \
  }
static int cson_utf8Read(
  const unsigned char *z,         /* First byte of UTF-8 character */
  const unsigned char *zTerm,     /* Pretend this byte is 0x00 */
  const unsigned char **pzNext    /* Write first byte past UTF-8 char here */
){
  int c;
  READ_UTF8(z, zTerm, c);
  *pzNext = z;
  return c;
}
#undef READ_UTF8

#if defined(_WIN32)
#  pragma warning( pop )
#endif

unsigned int cson_string_length_utf8( cson_string const * str )
{
    if( ! str ) return 0;
    else
    {
        char unsigned const * pos = (char unsigned const *)cson_string_cstr(str);
        char unsigned const * end = pos + str->length;
        unsigned int rc = 0;
        for( ; (pos < end) && cson_utf8Read(pos, end, &pos);
            ++rc )
        {
        };
        return rc;
    }
}

/**
   Escapes the first len bytes of the given string as JSON and sends
   it to the given output function (which will be called often - once
   for each logical character). The output is also surrounded by
   double-quotes.

   A NULL str will be escaped as an empty string, though we should
   arguably export it as "null" (without quotes). We do this because
   in JavaScript (typeof null === "object"), and by outputing null
   here we would effectively change the data type from string to
   object.
*/
static int cson_str_to_json( char const * str, unsigned int len,
                             char escapeFwdSlash,
                             cson_data_dest_f f, void * state )
{
    if( NULL == f ) return cson_rc.ArgError;
    else if( !str || !*str || (0 == len) )
    { /* special case for 0-length strings. */
        return f( state, "\"\"", 2 );
    }
    else
    {
        unsigned char const * pos = (unsigned char const *)str;
        unsigned char const * end = (unsigned char const *)(str ? (str + len) : NULL);
        unsigned char const * next = NULL;
        int ch;
        unsigned char clen = 0;
        char escChar[3] = {'\\',0,0};
        enum { UBLen = 8 };
        char ubuf[UBLen];
        int rc = 0;
        rc = f(state, "\"", 1 );
        for( ; (pos < end) && (0 == rc); pos += clen )
        {
            ch = cson_utf8Read(pos, end, &next);
            if( 0 == ch ) break;
            assert( next > pos );
            clen = next - pos;
            assert( clen );
            if( 1 == clen )
            { /* ASCII */
                assert( *pos == ch );
                escChar[1] = 0;
                switch(ch)
                {
                  case '\t': escChar[1] = 't'; break;
                  case '\r': escChar[1] = 'r'; break;
                  case '\n': escChar[1] = 'n'; break;
                  case '\f': escChar[1] = 'f'; break;
                  case '\b': escChar[1] = 'b'; break;
                  case '/':
      /*
        Regarding escaping of forward-slashes. See the main exchange below...

        --------------
        From: Douglas Crockford <douglas@crockford.com>
        To: Stephan Beal <sgbeal@googlemail.com>
        Subject: Re: Is escaping of forward slashes required?

        It is allowed, not required. It is allowed so that JSON can be safely
        embedded in HTML, which can freak out when seeing strings containing
        "</". JSON tolerates "<\/" for this reason.

        On 4/8/2011 2:09 PM, Stephan Beal wrote:
        > Hello, Jsonites,
        >
        > i'm a bit confused on a small grammatic detail of JSON:
        >
        > if i'm reading the grammar chart on http://www.json.org/ correctly,
        > forward slashes (/) are supposed to be escaped in JSON. However, the
        > JSON class provided with my browsers (Chrome and FF, both of which i
        > assume are fairly standards/RFC-compliant) do not escape such characters.
        >
        > Is backslash-escaping forward slashes required? If so, what is the
        > justification for it? (i ask because i find it unnecessary and hard to
        > look at.)
        --------------
      */
                      if( escapeFwdSlash ) escChar[1] = '/';
                      break;
                  case '\\': escChar[1] = '\\'; break;
                  case '"': escChar[1] = '"'; break;
                  default: break;
                }
                if( escChar[1])
                {
                    rc = f(state, escChar, 2);
                }
                else
                {
                    rc = f(state, (char const *)pos, clen);
                }
                continue;
            }
            else
            { /* UTF: transform it to \uXXXX */
                memset(ubuf,0,UBLen);
                rc = sprintf(ubuf, "\\u%04x",ch);
                if( rc != 6 )
                {
                    rc = cson_rc.RangeError;
                    break;
                }
                rc = f( state, ubuf, 6 );
                continue;
            }
        }
        if( 0 == rc )
        {
            rc = f(state, "\"", 1 );
        }
        return rc;
    }
}

int cson_object_iter_init( cson_object const * obj, cson_object_iterator * iter )
{
    if( ! obj || !iter ) return cson_rc.ArgError;
    else
    {
        iter->obj = obj;
        iter->pos = 0;
        return 0;
    }
}

cson_kvp * cson_object_iter_next( cson_object_iterator * iter )
{
    if( ! iter || !iter->obj ) return NULL;
    else if( iter->pos >= iter->obj->kvp.count ) return NULL;
    else
    {
        cson_kvp * rc = iter->obj->kvp.list[iter->pos++];
        while( (NULL==rc) && (iter->pos < iter->obj->kvp.count))
        {
            rc = iter->obj->kvp.list[iter->pos++];
        }
        return rc;
    }
}

static int cson_output_null( cson_data_dest_f f, void * state )
{
    if( !f ) return cson_rc.ArgError;
    else
    {
        return f(state, "null", 4);
    }
}

static int cson_output_bool( cson_value const * src, cson_data_dest_f f, void * state )
{
    if( !f ) return cson_rc.ArgError;
    else
    {
        char const v = cson_value_get_bool(src);
        return f(state, v ? "true" : "false", v ? 4 : 5);
    }
}

static int cson_output_integer( cson_value const * src, cson_data_dest_f f, void * state )
{
    if( !f ) return cson_rc.ArgError;
    else if( !cson_value_is_integer(src) ) return cson_rc.TypeError;
    else
    {
        enum { BufLen = 100 };
        char b[BufLen];
        int rc;
        memset( b, 0, BufLen );
        rc = sprintf( b, "%"CSON_INT_T_PFMT, cson_value_get_integer(src) )
            /* Reminder: snprintf() is C99 */
            ;
        return ( rc<=0 )
            ? cson_rc.RangeError
            : f( state, b, (unsigned int)rc )
            ;
    }
}

static int cson_output_double( cson_value const * src, cson_data_dest_f f, void * state )
{
    if( !f ) return cson_rc.ArgError;
    else if( !cson_value_is_double(src) ) return cson_rc.TypeError;
    else
    {
        enum { BufLen = 128 /* this must be relatively large or huge
                               doubles can cause us to overrun here,
                               resulting in stack-smashing errors.
                            */};
        char b[BufLen];
        int rc;
        memset( b, 0, BufLen );
        rc = sprintf( b, "%"CSON_DOUBLE_T_PFMT, cson_value_get_double(src) )
            /* Reminder: snprintf() is C99 */
            ;
        if( rc<=0 ) return cson_rc.RangeError;
        else if(1)
        { /* Strip trailing zeroes before passing it on... */
            unsigned int urc = (unsigned int)rc;
            char * pos = b + urc - 1;
            for( ; ('0' == *pos) && urc && (*(pos-1) != '.'); --pos, --urc )
            {
                *pos = 0;
            }
            assert(urc && *pos);
            return f( state, b, urc );
        }
        else
        {
            unsigned int urc = (unsigned int)rc;
            return f( state, b, urc );
        }
        return 0;
    }
}

static int cson_output_string( cson_value const * src, char escapeFwdSlash, cson_data_dest_f f, void * state )
{
    if( !f ) return cson_rc.ArgError;
    else if( ! cson_value_is_string(src) ) return cson_rc.TypeError;
    else
    {
        cson_string const * str = cson_value_get_string(src);
        assert( NULL != str );
        return cson_str_to_json(cson_string_cstr(str), str->length, escapeFwdSlash, f, state);
    }
}


/**
   Outputs indention spacing to f().

   blanks: (0)=no indentation, (1)=1 TAB per/level, (>1)=n spaces/level

   depth is the current depth of the output tree, and determines how much
   indentation to generate.

   If blanks is 0 this is a no-op. Returns non-0 on error, and the
   error code will always come from f().
*/
static int cson_output_indent( cson_data_dest_f f, void * state,
                               unsigned char blanks, unsigned int depth )
{
    if( 0 == blanks ) return 0;
    else
    {
#if 0
        /* FIXME: stuff the indention into the buffer and make a single
           call to f().
        */
        enum { BufLen = 200 };
        char buf[BufLen];
#endif
        unsigned int i;
        unsigned int x;
        char const ch = (1==blanks) ? '\t' : ' ';
        int rc = f(state, "\n", 1 );
        for( i = 0; (i < depth) && (0 == rc); ++i )
        {
            for( x = 0; (x < blanks) && (0 == rc); ++x )
            {
                rc = f(state, &ch, 1);
            }
        }
        return rc;
    }
}

static int cson_output_array( cson_value const * src, cson_data_dest_f f, void * state,
                              cson_output_opt const * fmt, unsigned int level );
static int cson_output_object( cson_value const * src, cson_data_dest_f f, void * state,
                               cson_output_opt const * fmt, unsigned int level );
/**
   Main cson_output() implementation. Dispatches to a different impl depending
   on src->api->typeID.

   Returns 0 on success.
*/
static int cson_output_impl( cson_value const * src, cson_data_dest_f f, void * state,
                             cson_output_opt const * fmt, unsigned int level )
{
    if( ! src || !f || !src->api ) return cson_rc.ArgError;
    else
    {
        int rc = 0;
        assert(fmt);
        switch( src->api->typeID )
        {
          case CSON_TYPE_UNDEF:
          case CSON_TYPE_NULL:
              rc = cson_output_null(f, state);
              break;
          case CSON_TYPE_BOOL:
              rc = cson_output_bool(src, f, state);
              break;
          case CSON_TYPE_INTEGER:
              rc = cson_output_integer(src, f, state);
              break;
          case CSON_TYPE_DOUBLE:
              rc = cson_output_double(src, f, state);
              break;
          case CSON_TYPE_STRING:
              rc = cson_output_string(src, fmt->escapeForwardSlashes, f, state);
              break;
          case CSON_TYPE_ARRAY:
              rc = cson_output_array( src, f, state, fmt, level );
              break;
          case CSON_TYPE_OBJECT:
              rc = cson_output_object( src, f, state, fmt, level );
              break;
          default:
              rc = cson_rc.TypeError;
              break;
        }
        return rc;
    }
}


static int cson_output_array( cson_value const * src, cson_data_dest_f f, void * state,
                              cson_output_opt const * fmt, unsigned int level )
{
    if( !src || !f || !fmt ) return cson_rc.ArgError;
    else if( ! cson_value_is_array(src) ) return cson_rc.TypeError;
    else if( level > fmt->maxDepth ) return cson_rc.RangeError;
    else
    {
        int rc;
        unsigned int i;
        cson_value const * v;
        char doIndent = fmt->indentation ? 1 : 0;
        cson_array const * ar = cson_value_get_array(src);
        assert( NULL != ar );
        if( 0 == ar->list.count )
        {
            return f(state, "[]", 2 );
        }
        else if( (1 == ar->list.count) && !fmt->indentSingleMemberValues ) doIndent = 0;
        rc = f(state, "[", 1);
        ++level;
        if( doIndent )
        {
            rc = cson_output_indent( f, state, fmt->indentation, level );
        }
        for( i = 0; (i < ar->list.count) && (0 == rc); ++i )
        {
            v = ar->list.list[i];
            if( v )
            {
                rc = cson_output_impl( v, f, state, fmt, level );
            }
            else
            {
                rc = cson_output_null( f, state );
            }
            if( 0 == rc )
            {
                if(i < (ar->list.count-1))
                {
                    rc = f(state, ",", 1);
                    if( 0 == rc )
                    {
                        rc = doIndent
                            ? cson_output_indent( f, state, fmt->indentation, level )
                            : f( state, " ", 1 );
                    }
                }
            }
        }
        --level;
        if( doIndent && (0 == rc) )
        {
            rc = cson_output_indent( f, state, fmt->indentation, level );
        }
        return (0 == rc)
            ? f(state, "]", 1)
            : rc;
    }
}

static int cson_output_object( cson_value const * src, cson_data_dest_f f, void * state,
                               cson_output_opt const * fmt, unsigned int level )
{
    if( !src || !f || !fmt ) return cson_rc.ArgError;
    else if( ! cson_value_is_object(src) ) return cson_rc.TypeError;
    else if( level > fmt->maxDepth ) return cson_rc.RangeError;
    else
    {
        int rc;
        unsigned int i;
        cson_kvp const * kvp;
        char doIndent = fmt->indentation ? 1 : 0;
        cson_object const * obj = cson_value_get_object(src);
        assert( (NULL != obj) && (NULL != fmt));
        if( 0 == obj->kvp.count )
        {
            return f(state, "{}", 2 );
        }
        else if( (1 == obj->kvp.count) && !fmt->indentSingleMemberValues ) doIndent = 0;
        rc = f(state, "{", 1);
        ++level;
        if( doIndent )
        {
            rc = cson_output_indent( f, state, fmt->indentation, level );
        }
        for( i = 0; (i < obj->kvp.count) && (0 == rc); ++i )
        {
            kvp = obj->kvp.list[i];
            if( kvp && kvp->key )
            {
                rc = cson_str_to_json(cson_string_cstr(kvp->key), kvp->key->length,
                                      fmt->escapeForwardSlashes, f, state);
                if( 0 == rc )
                {
                    rc = fmt->addSpaceAfterColon
                        ? f(state, ": ", 2 )
                        : f(state, ":", 1 )
                        ;
                }
                if( 0 == rc)
                {
                    rc = ( kvp->value )
                        ? cson_output_impl( kvp->value, f, state, fmt, level )
                        : cson_output_null( f, state );
                }
            }
            else
            {
                assert( 0 && "Possible internal error." );
                continue /* internal error? */;
            }
            if( 0 == rc )
            {
                if(i < (obj->kvp.count-1))
                {
                    rc = f(state, ",", 1);
                    if( 0 == rc )
                    {
                        rc = doIndent
                            ? cson_output_indent( f, state, fmt->indentation, level )
                            : f( state, " ", 1 );
                    }
                }
            }
        }
        --level;
        if( doIndent && (0 == rc) )
        {
            rc = cson_output_indent( f, state, fmt->indentation, level );
        }
        return (0 == rc)
            ? f(state, "}", 1)
            : rc;
    }
}

int cson_output( cson_value const * src, cson_data_dest_f f,
                 void * state, cson_output_opt const * fmt )
{
    int rc;
    if(! fmt ) fmt = &cson_output_opt_empty;
    rc = cson_output_impl(src, f, state, fmt, 0 );
    if( (0 == rc) && fmt->addNewline )
    {
        rc = f(state, "\n", 1);
    }
    return rc;
}

int cson_data_dest_FILE( void * state, void const * src, unsigned int n )
{
    if( ! state ) return cson_rc.ArgError;
    else if( !src || !n ) return 0;
    else
    {
        return ( 1 == fwrite( src, n, 1, (FILE*) state ) )
            ? 0
            : cson_rc.IOError;
    }
}

int cson_output_FILE( cson_value const * src, FILE * dest, cson_output_opt const * fmt )
{
    int rc = 0;
    if( fmt )
    {
        rc = cson_output( src, cson_data_dest_FILE, dest, fmt );
    }
    else
    {
        /* We normally want a newline on FILE output. */
        cson_output_opt opt = cson_output_opt_empty;
        opt.addNewline = 1;
        rc = cson_output( src, cson_data_dest_FILE, dest, &opt );
    }
    if( 0 == rc )
    {
        fflush( dest );
    }
    return rc;
}

int cson_output_filename( cson_value const * src, char const * dest, cson_output_opt const * fmt )
{
    if( !src || !dest ) return cson_rc.ArgError;
    else
    {
        FILE * f = fopen(dest,"wb");
        if( !f ) return cson_rc.IOError;
        else
        {
            int const rc = cson_output_FILE( src, f, fmt );
            fclose(f);
            return rc;
        }
    }
}

int cson_parse_filename( cson_value ** tgt, char const * src,
                         cson_parse_opt const * opt, cson_parse_info * err )
{
    if( !src || !tgt ) return cson_rc.ArgError;
    else
    {
        FILE * f = fopen(src, "r");
        if( !f ) return cson_rc.IOError;
        else
        {
            int const rc = cson_parse_FILE( tgt, f, opt, err );
            fclose(f);
            return rc;
        }
    }
}

/** Internal type to hold state for a JSON input string.
 */
typedef struct cson_data_source_StringSource_
{
    /** Start of input string. */
    char const * str;
    /** Current iteration position. Must initially be == str. */
    char const * pos;
    /** Logical EOF, one-past-the-end of str. */
    char const * end;
}  cson_data_source_StringSource_t;

/**
   A cson_data_source_f() implementation which requires the state argument
   to be a properly populated (cson_data_source_StringSource_t*).
*/
static int cson_data_source_StringSource( void * state, void * dest, unsigned int * n )
{
    if( !state || !n || !dest ) return cson_rc.ArgError;
    else if( !*n ) return 0 /* ignore this */;
    else
    {
        unsigned int i;
        cson_data_source_StringSource_t * ss = (cson_data_source_StringSource_t*) state;
        unsigned char * tgt = (unsigned char *)dest;
        for( i = 0; (i < *n) && (ss->pos < ss->end); ++i, ++ss->pos, ++tgt )
        {
            *tgt = *ss->pos;
        }
        *n = i;
        return 0;
    }
}

int cson_parse_string( cson_value ** tgt, char const * src, unsigned int len,
                       cson_parse_opt const * opt, cson_parse_info * err )
{
    if( ! tgt || !src ) return cson_rc.ArgError;
    else if( !*src || (len<2/*2==len of {} and []*/) ) return cson_rc.RangeError;
    else
    {
        cson_data_source_StringSource_t ss;
        ss.str = ss.pos = src;
        ss.end = src + len;
        return cson_parse( tgt, cson_data_source_StringSource, &ss, opt, err );
    }

}

int cson_parse_buffer( cson_value ** tgt,
                       cson_buffer const * buf,
                       cson_parse_opt const * opt,
                       cson_parse_info * err )
{
    return ( !tgt || !buf || !buf->mem || !buf->used )
        ? cson_rc.ArgError
        : cson_parse_string( tgt, (char const *)buf->mem,
                             buf->used, opt, err );
}

int cson_buffer_reserve( cson_buffer * buf, cson_size_t n )
{
    if( ! buf ) return cson_rc.ArgError;
    else if( 0 == n )
    {
        cson_free(buf->mem, "cson_buffer::mem");
        *buf = cson_buffer_empty;
        return 0;
    }
    else if( buf->capacity >= n )
    {
        return 0;
    }
    else
    {
        unsigned char * x = (unsigned char *)realloc( buf->mem, n );
        if( ! x ) return cson_rc.AllocError;
        memset( x + buf->used, 0, n - buf->used );
        buf->mem = x;
        buf->capacity = n;
        ++buf->timesExpanded;
        return 0;
    }
}

cson_size_t cson_buffer_fill( cson_buffer * buf, char c )
{
    if( !buf || !buf->capacity || !buf->mem ) return 0;
    else
    {
        memset( buf->mem, c, buf->capacity );
        return buf->capacity;
    }
}

/**
   cson_data_dest_f() implementation, used by cson_output_buffer().

   arg MUST be a (cson_buffer*). This function appends n bytes at
   position arg->used, expanding the buffer as necessary.
*/
static int cson_data_dest_cson_buffer( void * arg, void const * data_, unsigned int n )
{
    if( ! arg || (n<0) ) return cson_rc.ArgError;
    else if( ! n ) return 0;
    else
    {
        cson_buffer * sb = (cson_buffer*)arg;
        char const * data = (char const *)data_;
        cson_size_t npos = sb->used + n;
        unsigned int i;
        if( npos >= sb->capacity )
        {
            const cson_size_t oldCap = sb->capacity;
            const cson_size_t asz = npos * 2;
            if( asz < npos ) return cson_rc.ArgError; /* overflow */
            else if( 0 != cson_buffer_reserve( sb, asz ) ) return cson_rc.AllocError;
            assert( (sb->capacity > oldCap) && "Internal error in memory buffer management!" );
            /* make sure it gets NULL terminated. */
            memset( sb->mem + oldCap, 0, (sb->capacity - oldCap) );
        }
        for( i = 0; i < n; ++i, ++sb->used )
        {
            sb->mem[sb->used] = data[i];
        }
        return 0;
    }
}


int cson_output_buffer( cson_value const * v, cson_buffer * buf,
                        cson_output_opt const * opt )
{
    int rc = cson_output( v, cson_data_dest_cson_buffer, buf, opt );
    if( 0 == rc )
    { /* Ensure that the buffer is null-terminated. */
        rc = cson_buffer_reserve( buf, buf->used + 1 );
        if( 0 == rc )
        {
            buf->mem[buf->used] = 0;
        }
    }
    return rc;
}

/** @internal

Tokenizes an input string on a given separator. Inputs are:

- (inp) = is a pointer to the pointer to the start of the input.

- (separator) = the separator character

- (end) = a pointer to NULL. i.e. (*end == NULL)

This function scans *inp for the given separator char or a NULL char.
Successive separators at the start of *inp are skipped. The effect is
that, when this function is called in a loop, all neighboring
separators are ignored. e.g. the string "aa.bb...cc" will tokenize to
the list (aa,bb,cc) if the separator is '.' and to (aa.,...cc) if the
separator is 'b'.

Returns 0 (false) if it finds no token, else non-0 (true).

Output:

- (*inp) will be set to the first character of the next token.

- (*end) will point to the one-past-the-end point of the token.

If (*inp == *end) then the end of the string has been reached
without finding a token.

Post-conditions:

- (*end == *inp) if no token is found.

- (*end > *inp) if a token is found.

It is intolerant of NULL values for (inp, end), and will assert() in
debug builds if passed NULL as either parameter.
*/
static char cson_next_token( char const ** inp, char separator, char const ** end )
{
    char const * pos = NULL;
    assert( inp && end && *inp );
    if( *inp == *end ) return 0;
    pos = *inp;
    if( !*pos )
    {
        *end = pos;
        return 0;
    }
    for( ; *pos && (*pos == separator); ++pos) { /* skip preceeding splitters */ }
    *inp = pos;
    for( ; *pos && (*pos != separator); ++pos) { /* find next splitter */ }
    *end = pos;
    return (pos > *inp) ? 1 : 0;
}

int cson_object_fetch_sub( cson_object const * obj, cson_value ** tgt, char const * path, char sep )
{
    if( ! obj || !path ) return cson_rc.ArgError;
    else if( !*path || !sep ) return cson_rc.RangeError;
    else
    {
        char const * beg = path;
        char const * end = NULL;
        int rc;
        unsigned int i, len;
        unsigned int tokenCount = 0;
        cson_value * cv = NULL;
        cson_object const * curObj = obj;
        enum { BufSize = 128 };
        char buf[BufSize];
        memset( buf, 0, BufSize );
        rc = cson_rc.RangeError;

        while( cson_next_token( &beg, sep, &end ) )
        {
            if( beg == end ) break;
            else
            {
                ++tokenCount;
                beg = end;
                end = NULL;
            }
        }
        if( 0 == tokenCount ) return cson_rc.RangeError;
        beg = path;
        end = NULL;
        for( i = 0; i < tokenCount; ++i, beg=end, end=NULL )
        {
            rc = cson_next_token( &beg, sep, &end );
            assert( 1 == rc );
            assert( beg != end );
            assert( end > beg );
            len = end - beg;
            if( len > (BufSize-1) ) return cson_rc.RangeError;
            memset( buf, 0, len + 1 );
            memcpy( buf, beg, len );
            buf[len] = 0;
            cv = cson_object_get( curObj, buf );
            if( NULL == cv ) return cson_rc.NotFoundError;
            else if( i == (tokenCount-1) )
            {
                if(tgt) *tgt = cv;
                return 0;
            }
            else if( cson_value_is_object(cv) )
            {
                curObj = cson_value_get_object(cv);
                assert((NULL != curObj) && "Detected mis-management of internal memory!");
            }
            /* TODO: arrays. Requires numeric parsing for the index. */
            else
            {
                return cson_rc.NotFoundError;
            }
        }
        assert( i == tokenCount );
        return cson_rc.NotFoundError;
    }
}

cson_value * cson_object_get_sub( cson_object const * obj, char const * path, char sep )
{
    cson_value * v = NULL;
    cson_object_fetch_sub( obj, &v, path, sep );
    return v;
}

static cson_value * cson_value_clone_array( cson_value const * orig )
{
    unsigned int i = 0;
    cson_array const * asrc = cson_value_get_array( orig );
    unsigned int alen = cson_array_length_get( asrc );
    cson_value * destV = NULL;
    cson_array * destA = NULL;
    assert( orig && asrc );
    destV = cson_value_new_array();
    if( NULL == destV ) return NULL;
    destA = cson_value_get_array( destV );
    assert( destA );
    if( 0 != cson_array_reserve( destA, alen ) )
    {
        cson_value_free( destV );
        return NULL;
    }
    for( ; i < alen; ++i )
    {
        cson_value * ch = cson_array_get( asrc, i );
        if( NULL != ch )
        {
            cson_value * cl = cson_value_clone( ch );
            if( NULL == cl )
            {
                cson_value_free( destV );
                return NULL;
            }
            if( 0 != cson_array_set( destA, i, cl ) )
            {
                cson_value_free( cl );
                cson_value_free( destV );
                return NULL;
            }
        }
    }
    return destV;
}

static cson_value * cson_value_clone_object( cson_value const * orig )
{
    cson_object const * src = cson_value_get_object( orig );
    cson_value * destV = NULL;
    cson_object * dest = NULL;
    cson_kvp const * kvp = NULL;
    cson_object_iterator iter = cson_object_iterator_empty;
    assert( orig && src );
    if( 0 != cson_object_iter_init( src, &iter ) )
    {
        cson_value_free( destV );
        return NULL;
    }
    destV = cson_value_new_object();
    if( NULL == destV ) return NULL;
    dest = cson_value_get_object( destV );
    assert( dest );
    while( (kvp = cson_object_iter_next( &iter )) )
    {
        cson_string const * key = cson_kvp_key( kvp );
        cson_value const * val = cson_kvp_value( kvp );
        if( 0 != cson_object_set( dest,
                                  cson_string_cstr( key ),
                                  cson_value_clone( val ) ) )
        {
            cson_value_free( destV );
            return NULL;
        }
    }
    return destV;
}

cson_value * cson_value_clone( cson_value const * orig )
{
    if( NULL == orig ) return NULL;
    else
    {
        switch( orig->api->typeID )
        {
          case CSON_TYPE_UNDEF:
              return cson_value_new();
          case CSON_TYPE_NULL:
              return cson_value_null();
          case CSON_TYPE_BOOL:
              return cson_value_new_bool( cson_value_get_bool( orig ) );
          case CSON_TYPE_INTEGER:
              return cson_value_new_integer( cson_value_get_integer( orig ) );
              break;
          case CSON_TYPE_DOUBLE:
              return cson_value_new_double( cson_value_get_double( orig ) );
              break;
          case CSON_TYPE_STRING: {
              cson_string const * str = cson_value_get_string( orig );
              return cson_value_new_string( cson_string_cstr( str ),
                                            cson_string_length_bytes( str ) );
          }
          case CSON_TYPE_ARRAY:
              return cson_value_clone_array( orig );
          case CSON_TYPE_OBJECT:
              return cson_value_clone_object( orig );
        }
        assert( 0 && "We can't get this far." );
        return NULL;
    }
}

#if 0
/* i'm not happy with this... */
char * cson_pod_to_string( cson_value const * orig )
{
    if( ! orig ) return NULL;
    else
    {
        enum { BufSize = 64 };
        char * v = NULL;
        switch( orig->api->typeID )
        {
          case CSON_TYPE_BOOL: {
              char const bv = cson_value_get_bool(orig);
              v = cson_strdup( bv ? "true" : "false",
                               bv ? 4 : 5 );
              break;
          }
          case CSON_TYPE_UNDEF:
          case CSON_TYPE_NULL: {
              v = cson_strdup( "null", 4 );
              break;
          }
          case CSON_TYPE_STRING: {
              cson_string const * jstr = cson_value_get_string(orig);
              unsigned const int slen = cson_string_length_bytes( jstr );
              assert( NULL != jstr );
              v = cson_strdup( cson_string_cstr( jstr ), slen ); 
              break;
          }
          case CSON_TYPE_INTEGER: {
              char buf[BufSize] = {0};
              if( 0 < sprintf( v, "%"CSON_INT_T_PFMT, cson_value_get_integer(orig)) )
              {
                  v = cson_strdup( buf, strlen(buf) );
              }
              break;
          }
          case CSON_TYPE_DOUBLE: {
              char buf[BufSize] = {0};
              if( 0 < sprintf( v, "%"CSON_DOUBLE_T_PFMT, cson_value_get_double(orig)) )
              {
                  v = cson_strdup( buf, strlen(buf) );
              }
              break;
          }
          default:
              break;
        }
        return v;
    }
}
#endif

#if 0
/* i'm not happy with this... */
char * cson_pod_to_string( cson_value const * orig )
{
    if( ! orig ) return NULL;
    else
    {
        enum { BufSize = 64 };
        char * v = NULL;
        switch( orig->api->typeID )
        {
          case CSON_TYPE_BOOL: {
              char const bv = cson_value_get_bool(orig);
              v = cson_strdup( bv ? "true" : "false",
                               bv ? 4 : 5 );
              break;
          }
          case CSON_TYPE_UNDEF:
          case CSON_TYPE_NULL: {
              v = cson_strdup( "null", 4 );
              break;
          }
          case CSON_TYPE_STRING: {
              cson_string const * jstr = cson_value_get_string(orig);
              unsigned const int slen = cson_string_length_bytes( jstr );
              assert( NULL != jstr );
              v = cson_strdup( cson_string_cstr( jstr ), slen ); 
              break;
          }
          case CSON_TYPE_INTEGER: {
              char buf[BufSize] = {0};
              if( 0 < sprintf( v, "%"CSON_INT_T_PFMT, cson_value_get_integer(orig)) )
              {
                  v = cson_strdup( buf, strlen(buf) );
              }
              break;
          }
          case CSON_TYPE_DOUBLE: {
              char buf[BufSize] = {0};
              if( 0 < sprintf( v, "%"CSON_DOUBLE_T_PFMT, cson_value_get_double(orig)) )
              {
                  v = cson_strdup( buf, strlen(buf) );
              }
              break;
          }
          default:
              break;
        }
        return v;
    }
}
#endif

#if defined(__cplusplus)
} /*extern "C"*/
#endif

#undef MARKER
#undef CSON_OBJECT_PROPS_SORT
#undef CSON_OBJECT_PROPS_SORT_USE_LENGTH
/* end file ./cson.c */
/* begin file ./cson_lists.h */
/* Auto-generated from cson_list.h. Edit at your own risk! */
unsigned int cson_value_list_reserve( cson_value_list * self, unsigned int n )
{
    if( !self ) return 0;
    else if(0 == n)
    {
        if(0 == self->alloced) return 0;
        cson_free(self->list, "cson_value_list_reserve");
        self->list = NULL;
        self->alloced = self->count = 0;
        return 0;
    }
    else if( self->alloced >= n )
    {
        return self->alloced;
    }
    else
    {
        size_t const sz = sizeof(cson_value *) * n;
        cson_value * * m = (cson_value **)cson_realloc( self->list, sz, "cson_value_list_reserve" );
        if( ! m ) return self->alloced;

        memset( m + self->alloced, 0, (sizeof(cson_value *)*(n-self->alloced)));
        self->alloced = n;
        self->list = m;
        return n;
    }
}
int cson_value_list_append( cson_value_list * self, cson_value * cp )
{
    if( !self || !cp ) return cson_rc.ArgError;
    else if( self->alloced > cson_value_list_reserve(self, self->count+1) )
    {
        return cson_rc.AllocError;
    }
    else
    {
        self->list[self->count++] = cp;
        return 0;
    }
}
int cson_value_list_visit( cson_value_list * self,

                        int (*visitor)(cson_value * obj, void * visitorState ),



                        void * visitorState )
{
    int rc = cson_rc.ArgError;
    if( self && visitor )
    {
        unsigned int i = 0;
        for( rc = 0; (i < self->count) && (0 == rc); ++i )
        {

            cson_value * obj = self->list[i];



            if(obj) rc = visitor( obj, visitorState );
        }
    }
    return rc;
}
void cson_value_list_clean( cson_value_list * self,

                         void (*cleaner)(cson_value * obj)



                         )
{
    if( self && cleaner && self->count )
    {
        unsigned int i = 0;
        for( ; i < self->count; ++i )
        {

            cson_value * obj = self->list[i];



            if(obj) cleaner(obj);
        }
    }
    cson_value_list_reserve(self,0);
}
unsigned int cson_kvp_list_reserve( cson_kvp_list * self, unsigned int n )
{
    if( !self ) return 0;
    else if(0 == n)
    {
        if(0 == self->alloced) return 0;
        cson_free(self->list, "cson_kvp_list_reserve");
        self->list = NULL;
        self->alloced = self->count = 0;
        return 0;
    }
    else if( self->alloced >= n )
    {
        return self->alloced;
    }
    else
    {
        size_t const sz = sizeof(cson_kvp *) * n;
        cson_kvp * * m = (cson_kvp **)cson_realloc( self->list, sz, "cson_kvp_list_reserve" );
        if( ! m ) return self->alloced;

        memset( m + self->alloced, 0, (sizeof(cson_kvp *)*(n-self->alloced)));
        self->alloced = n;
        self->list = m;
        return n;
    }
}
int cson_kvp_list_append( cson_kvp_list * self, cson_kvp * cp )
{
    if( !self || !cp ) return cson_rc.ArgError;
    else if( self->alloced > cson_kvp_list_reserve(self, self->count+1) )
    {
        return cson_rc.AllocError;
    }
    else
    {
        self->list[self->count++] = cp;
        return 0;
    }
}
int cson_kvp_list_visit( cson_kvp_list * self,

                        int (*visitor)(cson_kvp * obj, void * visitorState ),



                        void * visitorState )
{
    int rc = cson_rc.ArgError;
    if( self && visitor )
    {
        unsigned int i = 0;
        for( rc = 0; (i < self->count) && (0 == rc); ++i )
        {

            cson_kvp * obj = self->list[i];



            if(obj) rc = visitor( obj, visitorState );
        }
    }
    return rc;
}
void cson_kvp_list_clean( cson_kvp_list * self,

                         void (*cleaner)(cson_kvp * obj)



                         )
{
    if( self && cleaner && self->count )
    {
        unsigned int i = 0;
        for( ; i < self->count; ++i )
        {

            cson_kvp * obj = self->list[i];



            if(obj) cleaner(obj);
        }
    }
    cson_kvp_list_reserve(self,0);
}
/* end file ./cson_lists.h */
/* begin file ./cson_session.c */
#include <string.h> /* strlen() */
#include <stdlib.h> /* memcpy() */
#include <assert.h>


/**
   Maximum name length for cson_sessmgr_register(),
   including the trailing NUL.
*/
enum {
   CsonSessionNameLen = 32
};

typedef struct cson_sessmgr_reg cson_sessmgr_reg;
/**
   Holds name-to-factory mappings for cson_sessmgr implementations.
*/
struct cson_sessmgr_reg
{
    char name[CsonSessionNameLen];
    cson_sessmgr_factory_f factory;
};


#if !CSON_ENABLE_CPDO
int cson_sessmgr_cpdo( cson_sessmgr ** tgt, cson_object const * opt )
{
    return cson_rc.UnsupportedError;
}
#endif
#if !CSON_ENABLE_WHIO
int cson_sessmgr_whio_ht( cson_sessmgr ** tgt, cson_object const * opt )
{
    return cson_rc.UnsupportedError;
}
int cson_sessmgr_whio_epfs( cson_sessmgr ** tgt, cson_object const * opt )
{
    return cson_rc.UnsupportedError;
}
#endif

/**
   Holds the list of registered cson_sessmgr implementations. Used by
   cson_sessmgr_register(), cson_sessmgr_load(), and
   cson_sessmgr_names().

   Maintenance reminder: the API docs promise that at least 10 slots
   are initially available.
*/
static cson_sessmgr_reg CsonSessionReg[] = {
{{'f','i','l','e',0},cson_sessmgr_file},
#if CSON_ENABLE_CPDO
{{'c','p','d','o',0},cson_sessmgr_cpdo},
#endif
#if CSON_ENABLE_WHIO
{{'w','h','i','o','_','h','t',0},cson_sessmgr_whio_ht},
{{'w','h','i','o','_','e','p','f','s',0},cson_sessmgr_whio_epfs},
#endif
#define REG {{0},NULL}
REG,REG,REG,REG,REG,
REG,REG,REG,REG,REG
#undef REG
};
static const unsigned int CsonSessionRegLen = sizeof(CsonSessionReg)/sizeof(CsonSessionReg[0]);


int cson_sessmgr_register( char const * name, cson_sessmgr_factory_f f )
{
    if( ! name || !*name || !f ) return cson_rc.ArgError;
    else
    {
        cson_sessmgr_reg * r = CsonSessionReg;
        unsigned int nlen = strlen(name);
        unsigned int i = 0;
        if( nlen >= CsonSessionNameLen ) return cson_rc.RangeError;
        for( ; i < CsonSessionRegLen; ++i, ++r )
        {
            if( r->name[0] ) continue;
            memcpy( r->name, name, nlen );
            r->name[nlen] = 0;
            r->factory = f;
            return 0;
        }
        return cson_rc.RangeError;
    }
}


int cson_sessmgr_load( char const * name, cson_sessmgr ** tgt, cson_object const * opt )
{
    if( ! name || !*name || !tgt ) return cson_rc.ArgError;
    else
    {
        cson_sessmgr_reg const * r = CsonSessionReg;
        unsigned int i = 0;
        for( ; i < CsonSessionRegLen; ++i, ++r )
        {
            if( ! r->name[0] ) break /* end of list */;
            else if( 0 != strcmp( r->name, name ) ) continue;
            else
            {
                assert( NULL != r->factory );
                return r->factory( tgt, opt );
            }
            
        }
        return cson_rc.UnsupportedError;
    }
}

char const * const * cson_sessmgr_names()
{
    static char const * names[sizeof(CsonSessionReg)/sizeof(CsonSessionReg[0])+1];
    unsigned int i = 0;
    cson_sessmgr_reg const * r = CsonSessionReg;
    for( ; i < CsonSessionRegLen; ++i, ++r )
    {
        /*
          pedantic threading note: as long as this function is not
          used concurrently with cson_sessmgr_register(), the worst we
          will do here if this function is called, or its results
          used, concurrently is overwrite in-use values with the same
          values.
         */
        names[i] = r->name[0] ? r->name : NULL;
    }
    names[i] = NULL;
    return names;
}
/* end file ./cson_session.c */
/* begin file ./cson_session_file.c */
#if !defined(_WIN32)
#  if !defined(_POSIX_VERSION)
#    define _POSIX_VERSION 200112L /* chmod(), unlink() */
#  endif
#  define ENABLE_POSIX_FILE_OPS 1
#else
#  define ENABLE_POSIX_FILE_OPS 0
#endif

#include <stdlib.h>
#include <string.h>
#include <assert.h>
#if ENABLE_POSIX_FILE_OPS
#  include <unistd.h> /* unlink() */
#  include <sys/stat.h> /* chmod() */
#endif

static int cson_session_file_load( cson_sessmgr * self, cson_value ** tgt, char const * id );
static int cson_session_file_save( cson_sessmgr * self, cson_value const * root, char const * id );
static int cson_session_file_remove( cson_sessmgr * self, char const * id );
static void cson_session_file_finalize( cson_sessmgr * self );

static const cson_sessmgr_api cson_sessmgr_api_file =
{
    cson_session_file_load,
    cson_session_file_save,
    cson_session_file_remove,
    cson_session_file_finalize
};

typedef struct cson_sessmgr_file_impl cson_sessmgr_file_impl;
struct cson_sessmgr_file_impl
{
    char * dir;
    char * prefix;
    char * suffix;
};

static const cson_sessmgr cson_sessmgr_file_empty =
{
    &cson_sessmgr_api_file,
    NULL
};

static char * cson_session_file_strdup( char const * src )
{
    size_t const n = src ? strlen(src) : 0;
    char * rc = src ? (char *)calloc(1, n+1) : NULL;
    if( ! rc ) return NULL;
    memcpy( rc, src, n );
    return rc;
}

/* Helper macro for varios cson_sessmgr_api member implementations. */
#define IMPL_DECL(RC) \
    cson_sessmgr_file_impl * impl = (self && (self->api == &cson_sessmgr_api_file)) \
    ? (cson_sessmgr_file_impl*)self->impl \
    : NULL;                                   \
    if( NULL == impl ) return RC

static int cson_session_file_name( cson_sessmgr_file_impl * impl,
                                   char const * id,
                                   char * buf, unsigned int bufLen )
{
    char const * dir = impl->dir ? impl->dir : ".";
    char const * pre = impl->prefix ? impl->prefix : "";
    char const * suf = impl->suffix ? impl->suffix : "";
    char * pos = NULL /* current write possition. */;
    unsigned int flen = 0 /* length of the next token. */;
    unsigned int olen = 0 /* total number of bytes written so far. */;
    if( ! id || !*id ) return cson_rc.ArgError;

#define CHECKLEN if(olen >= bufLen) return cson_rc.RangeError; assert( pos < (buf+bufLen) )
    pos = buf;

#define PUSH(FIELD) \
    flen = strlen(FIELD); \
    olen += flen; \
    CHECKLEN; \
    strncpy( pos, FIELD, flen ); \
    pos += flen

    PUSH(dir);

    ++olen;
    CHECKLEN;
#if defined(_WIN32)
    *(pos++) = '\\';
#else
    *(pos++) = '/';
#endif

    PUSH(pre);
    PUSH(id);
    PUSH(suf);
    if( pos >= (buf + bufLen) ) return cson_rc.RangeError;
    *pos = 0;
    return 0;
#undef PUSH
#undef CHECKLEN
}

static int cson_session_file_load( cson_sessmgr * self, cson_value ** root, char const * id )
{
    enum { BufSize = 1024 };
    char fname[BufSize];
    FILE * fh = NULL;
    int rc;
    IMPL_DECL(cson_rc.ArgError);
    if( !root || !id || !*id ) return cson_rc.ArgError;
    memset( fname, 0, BufSize );
    rc = cson_session_file_name( impl, id, fname, BufSize );
    if( 0 != rc ) return rc;
    fh = fopen( fname, "r" );
    if( ! fh ) return cson_rc.IOError;
    rc = cson_parse_FILE( root, fh, NULL, NULL );
    fclose( fh );
    return rc;
}

static int cson_session_file_save( cson_sessmgr * self, cson_value const * root, char const * id )
{
    enum { BufSize = 1024 };
    char fname[BufSize];
    FILE * fh = NULL;
    int rc;
    IMPL_DECL(cson_rc.ArgError);
    if( !root || !id || !*id ) return cson_rc.ArgError;
    memset( fname, 0, BufSize );

    rc = cson_session_file_name( impl, id, fname, BufSize );
    if( 0 != rc ) return rc;
    fh = fopen( fname, "w" );
    if( ! fh ) return cson_rc.IOError;
#if ENABLE_POSIX_FILE_OPS
    chmod( fname, 0600 );
#endif
    rc = cson_output_FILE( root, fh, NULL );
    fclose( fh );
#if ENABLE_POSIX_FILE_OPS
    if( rc )
    {
        unlink( fname );
    }
#endif
    return rc;
}

void cson_session_file_finalize( cson_sessmgr * self )
{
    if( self && (self->api == &cson_sessmgr_api_file) )
    {
        cson_sessmgr_file_impl * impl = (cson_sessmgr_file_impl *)self->impl;
        free( impl->dir );
        free( impl->prefix );
        free( impl->suffix );
        free( impl );
        *self = cson_sessmgr_file_empty;
        free( self );
    }
}

static int cson_session_file_remove( cson_sessmgr * self, char const * id )
{
    enum { BufSize = 1024 };
    char fname[BufSize];
    int rc;
    IMPL_DECL(cson_rc.ArgError);
    if( !id || !*id ) return cson_rc.ArgError;
    memset( fname, 0, BufSize );
    rc = cson_session_file_name( impl, id, fname, BufSize );
    if( 0 != rc ) return rc;
#if ENABLE_POSIX_FILE_OPS
    rc = unlink( fname );
#else
#  error "unlink not implemented for this platform."
#endif
    return (0==rc) ? 0 : cson_rc.IOError;
}


int cson_sessmgr_file( cson_sessmgr ** tgt, cson_object const * opt )
{
    int rc;
    cson_sessmgr * m = tgt ? (cson_sessmgr *)malloc(sizeof(cson_sessmgr)) : NULL;
    cson_sessmgr_file_impl * impl = m
        ? (cson_sessmgr_file_impl *)malloc(sizeof(cson_sessmgr_file_impl))
        : NULL;
    if( ! m ) return tgt ? cson_rc.AllocError : cson_rc.ArgError;
    else if( ! impl )
    {
        free(m);
        return cson_rc.AllocError;
    }
    *m = cson_sessmgr_file_empty;
    m->impl = impl;
    if( opt )
    {
        cson_string const * jstr;
#define CP(KEY) \
        jstr = cson_value_get_string( cson_object_get( opt, # KEY ) ); \
        if( jstr ) { \
            impl->KEY = cson_session_file_strdup( cson_string_cstr( jstr ) ); \
            if( ! impl->KEY ) { \
                rc = cson_rc.AllocError;        \
                goto error_clean;               \
            } \
        } (void)0
        
        CP(dir);
        CP(prefix);
        CP(suffix);
#undef CP
    }
#define CP(KEY,VAL) if( ! impl->KEY ) { \
            impl->KEY = cson_session_file_strdup(VAL); \
            if( ! impl->KEY ) { \
                rc = cson_rc.AllocError;        \
                goto error_clean;               \
            } \
        } (void)0
#if ENABLE_POSIX_FILE_OPS
    CP(dir,"/tmp");
#else
    CP(dir,".");
#endif
    CP(prefix,"cson-session-");
    CP(suffix,".json");
#undef CP
    *tgt = m;
    return 0;
    error_clean:
    m->api->finalize( m );
    return rc;
}

#undef IMPL_DECL
#undef ENABLE_POSIX_FILE_OPS
/* end file ./cson_session_file.c */
/* begin file ./cson_sqlite3.c */
/** @file cson_sqlite3.c

This file contains the implementation code for the cson
sqlite3-to-JSON API.

License: the same as the cson core library.

Author: Stephan Beal (http://wanderinghorse.net/home/stephan)
*/
#if CSON_ENABLE_SQLITE3 /* we do this here for the sake of the amalgamation build */
#include <assert.h>
#include <string.h> /* strlen() */

#if 0
#include <stdio.h>
#define MARKER if(1) printf("MARKER: %s:%d:%s():\t",__FILE__,__LINE__,__func__); if(1) printf
#else
#define MARKER if(0) printf
#endif

#if defined(__cplusplus)
extern "C" {
#endif

static cson_value * cson_sqlite3_stmt_to_value( sqlite3_stmt * st, int col )
{
    if( ! st ) return NULL;
    else
    {
#if 0
        sqlite3_value * val = sqlite3_column_type(st,col);
        int const vtype = val ? sqlite3_value_type(val) : -1;
        if( ! val ) return cson_value_null();
#else
        int const vtype = sqlite3_column_type(st,col);
#endif
        switch( vtype )
        {
            case SQLITE_NULL:
                return cson_value_null();
          case SQLITE_INTEGER: {
              return cson_value_new_integer( (cson_int_t) sqlite3_column_int64(st, col)  );
          }
            case SQLITE_FLOAT:
                return cson_value_new_double( sqlite3_column_double(st, col) );
            case SQLITE_BLOB: /* arguably fall through... */
            case SQLITE_TEXT: {
                char const * str = (char const *)sqlite3_column_text(st,col);
                return cson_value_new_string(str, str ? strlen(str) : 0);
            }
            default:
                return NULL;
        }
    }
}

/**
    st must be a valid prepared statement. This function creates
    a JSON array containing its columns, in order.
    
    Returns a new array value on success, which the caller owns.
    On error NULL is returned.
    
    st is not traversed or freed by this function - only the column
    count and names are read.
*/
static cson_value * cson_sqlite3_stmt_cols( sqlite3_stmt * st )
{
    cson_value * aryV = NULL;
    cson_array * ary = NULL;
    char const * colName = NULL;
    int i = 0;
    int rc = 0;
    int colCount = 0;
    assert(st);
    colCount = sqlite3_column_count(st);
    if( colCount <= 0 ) return NULL;
    
    aryV = cson_value_new_array();
    if( ! aryV ) return NULL;
    ary = cson_value_get_array(aryV);
    assert(ary);
    for( i = 0; (0 ==rc) && (i < colCount); ++i )
    {
        colName = sqlite3_column_name( st, i );
        if( ! colName ) rc = cson_rc.AllocError;
        else
        {
            rc = cson_array_set( ary, (unsigned int)i,
                    cson_value_new_string(colName, strlen(colName)) );
        }
    }
    if( 0 == rc ) return aryV;
    else
    {
        cson_value_free(aryV);
        return NULL;
    }
}

/**
    Internal impl of cson_sqlite3_stmt_to_json() when the 'fat'
    parameter is non-0.
*/
static int cson_sqlite3_stmt_to_json_fat( sqlite3_stmt * st, cson_value ** tgt )
{
#define RETURN(RC) { if(rootV) cson_value_free(rootV); return RC; }
    if( ! tgt || !st ) return cson_rc.ArgError;
    else
    {
        cson_value * rootV = NULL;
        cson_object * root = NULL;
        cson_value * colsV = NULL;
        cson_value * rowsV = NULL;
        cson_array * rows = NULL;
        cson_value * objV = NULL;
        cson_object * obj = NULL;
        cson_value * currentValue = NULL;
        char const * colName = NULL;
        int rc = 0;
        int i = 0;
        int const colCount = sqlite3_column_count(st);
        if( colCount <= 0 ) return cson_rc.ArgError;
        rootV = cson_value_new_object();
        if( ! rootV ) return cson_rc.AllocError;
        colsV = cson_sqlite3_stmt_cols(st);
        if( ! colsV )
        {
            cson_value_free( rootV );
            RETURN(cson_rc.AllocError);
        }
        root = cson_value_get_object(rootV);
        rc = cson_object_set( root, "columns", colsV );
        if( rc )
        {
            cson_value_free( colsV );
            RETURN(rc);
        }

        colsV = NULL;
        
        rowsV = cson_value_new_array();
        if( ! rowsV ) RETURN(cson_rc.AllocError);
        rc = cson_object_set( root, "rows", rowsV );
        if( rc )
        {
            cson_value_free( rowsV );
            RETURN(rc);
        }
        rows = cson_value_get_array(rowsV);
        assert(rows);
        while( SQLITE_ROW == sqlite3_step(st) )
        {
            objV = cson_value_new_object();
            if( ! objV ) RETURN(cson_rc.AllocError);
            rc = cson_array_append( rows, objV );
            if( rc )
            {
                cson_value_free( objV );
                RETURN(rc);
            }
            obj = cson_value_get_object(objV);
            for( i = 0; i < colCount; ++i )
            {
                colName = sqlite3_column_name( st, i );
                if( ! colName ) RETURN(cson_rc.AllocError);
                currentValue = cson_sqlite3_stmt_to_value(st,i);
                if( ! currentValue ) currentValue = cson_value_null();
                rc = cson_object_set( obj, colName, currentValue );
                if( 0 != rc )
                {
                    cson_value_free( currentValue );
                    RETURN(rc);
                }
            }
        }
        *tgt = rootV;
        return 0;
    }
#undef RETURN
}

/**
    Internal impl of cson_sqlite3_stmt_to_json() when the 'fat'
    parameter is 0.
*/
static int cson_sqlite3_stmt_to_json_slim( sqlite3_stmt * st, cson_value ** tgt )
{
#define RETURN(RC) { if(rootV) cson_value_free(rootV); return RC; }
    if( ! tgt || !st ) return cson_rc.ArgError;
    else
    {
        cson_value * rootV = NULL;
        cson_object * root = NULL;
        cson_value * aryV = NULL;
        cson_array * ary = NULL;
        cson_value * rowsV = NULL;
        cson_array * rows = NULL;
        cson_value * colV = NULL;
        int rc = 0;
        int i = 0;
        int const colCount = sqlite3_column_count(st);
        if( colCount <= 0 ) return cson_rc.ArgError;
        rootV = cson_value_new_object();
        if( ! rootV ) return cson_rc.AllocError;
        aryV = cson_sqlite3_stmt_cols(st);
        if( ! aryV )
        {
            cson_value_free( rootV );
            RETURN(cson_rc.AllocError);
        }
        root = cson_value_get_object(rootV);
        rc = cson_object_set( root, "columns", aryV );
        if( rc )
        {
            cson_value_free( aryV );
            RETURN(rc);
        }
        aryV = NULL;
        ary = NULL;
        rowsV = cson_value_new_array();
        if( ! rowsV ) RETURN(cson_rc.AllocError);
        rc = cson_object_set( root, "rows", rowsV );
        if( 0 != rc )
        {
            cson_value_free( rowsV );
            RETURN(rc);
        }
        rows = cson_value_get_array(rowsV);
        assert(rows);
        while( SQLITE_ROW == sqlite3_step(st) )
        {
            aryV = cson_value_new_array();
            if( ! aryV ) RETURN(cson_rc.AllocError);
            rc = cson_array_append( rows, aryV );
            if( 0 != rc )
            {
                cson_value_free( aryV );
                RETURN(rc);
            }
            ary = cson_value_get_array(aryV);
            rc = cson_array_reserve(ary, (unsigned int) colCount );
            if( 0 != rc ) RETURN(rc);
            for( i = 0; i < colCount; ++i )
            {
                colV = cson_sqlite3_stmt_to_value(st,i);
                if( ! colV ) colV = cson_value_null();
                rc = cson_array_set( ary, i, colV );
                if( 0 != rc )
                {
                    cson_value_free( colV );
                    RETURN(rc);
                }
            }
        }
        *tgt = rootV;
        return 0;
    }
#undef RETURN
}

int cson_sqlite3_stmt_to_json( sqlite3_stmt * st, cson_value ** tgt, char fat )
{
    return fat
        ? cson_sqlite3_stmt_to_json_fat(st,tgt)
        : cson_sqlite3_stmt_to_json_slim(st,tgt)
        ;
}

int cson_sqlite3_sql_to_json( sqlite3 * db, cson_value ** tgt, char const * sql, char fat )
{
    if( !db || !tgt || !sql || !*sql ) return cson_rc.ArgError;
    else
    {
        sqlite3_stmt * st = NULL;
        int rc = sqlite3_prepare_v2( db, sql, -1, &st, NULL );
        if( 0 != rc ) return cson_rc.IOError /* FIXME: Better error code? */;
        rc = cson_sqlite3_stmt_to_json( st, tgt, fat );
        sqlite3_finalize( st );
        return rc;
    }        
}

#if defined(__cplusplus)
} /*extern "C"*/
#endif
#undef MARKER
#endif /* CSON_ENABLE_SQLITE3 */
/* end file ./cson_sqlite3.c */
/* begin file cgi/whuuid.h */
#if !defined(WANDERGINHORSE_NET_WHUUID_H_INCLUDED)
#define WANDERGINHORSE_NET_WHUUID_H_INCLUDED 1
#include <stdio.h> /* only for decl of FILE. */
/************************************************************************
An experiment in creating random UUIDs (http://wikipedia.org/wiki/Uuid).


Author: Stephan Beal (http://wanderinghorse.net/home/stephan/)

License: Public Domain


Features:

- Small API. Only two relevant classes and a handful of functions.

- Uses a client-specified RNG source. Two are provided with the
library. The RNG source may be arbitrarily stateful, and each may have
instance-specific data.

- State objects have a uniform cleanup interface, but each implementation
defines which cleanup behaviours need to be performed (e.g. closing
an input file).

- Fairly fast, assuming your RNG is. (My 2.6GHz PC can generate, and send
them to stdout, just over 1.3 million UUIDs per second.)


Misfeatures:

- Does not support a specific version of UUID, as detailed at
[http://wikipedia.org/wiki/Uuid]. Its UUIDs have random data in all
positions, as opposed to reserving certain positions for specific
values or using specified algorithms to generate the values. Thus the
UUIDs it generates are similar to Version 4 UUIDs except that no bytes
are reserved for specific values.

PS: i don't really consider that to be a mis-feature. IMHO UUIDs
should be completely random, with no reserved bytes.


------------------------------------------------------------------------
TIP: checking for duplicate UUIDs

The sqlite3 tool can be used for checking for duplicate UUIDs. Simply
print the UUIDs, one per line, and feed them into sqlite3 like so:

@code
sqlite3> create table ids (id,unide(id));
sqlite3> .import myUUIDListFile ids
@endcode

If sqlite3 does not complain, there were no duplicates.

You can also test by sorting the list, removing duplicates, and
checking the length of the list. e.g. assume we have a file named "1m"
containing 1 million UUIDs. From a Unix shell we could do:

@code
~> sort -u < 1m > 1ms
~> ls -la 1m 1ms
@endcode

If the files have the same size then there were no duplicates.

In my tests i have not encountered duplicates except when testing
a deterministic RNG with a specific seed.
************************************************************************/

/** @def WHUUID_CONFIG_KEEP_METRICS

    If WHUUID_CONFIG_KEEP_METRICS is a true value then the library keeps track
    of how many times a given hex digit value is generated by the
    whuuid_rng class. It has a minimal performance hit, but if
    the data will never be used then it can be turned off.
*/
#define WHUUID_CONFIG_KEEP_METRICS 1

/** @enum whuuid_constants

A list of constant values used by the whuuid API.

*/
enum whuuid_constants {
/**
   The length of a UUID canonical-form string, not including
   a trailing NULL bytes. e.g.:

   00000000-0000-0000-0000-000000000000
*/
whuuid_length_canonical = 36,
/**
   The length of a UUID in canonical form, including
   a trailing NULL byte.
*/
whuuid_length_cstring = whuuid_length_canonical + 1,
/**
   The number of bytes of data necessary to store
   a UUID in "raw" form.
*/
whuuid_length_bytes = 16
};

/**
   Represents a single UUID.
*/
struct whuuid_t
{
    unsigned char bytes[whuuid_length_bytes];
};
typedef struct whuuid_t whuuid_t;
/**
   A zero-initialized whuiid_t initialization object.
*/
extern const whuuid_t whuuid_t_empty;

/**
   A class holding RNG information. Each instance manages a single RNG
   source, which is used to populate any number of whuiid_t objects
   with random data. They may or may not need to dynamically allocate
   resources (e.g. open a file containing random data), depending
   on the implementation.   

   They should normally be initialized via factory functions, and
   those functions should:

   a) Allocate any private resources the object needs and store them in
   self->impl.

   b) Set the cleanup() member function to a function which knows how
   to clean up any resources stored in self->impl.

   c) Set the rand() member to a function which knows how to use
   the private state to generate random data.


   The most basic usage looks something like this:

   @code
   whuuid_rng st = whuuid_rng_lcrng; // a Linear Congruent RNG
   whuuid_t u = whuuid_t_empty;
   char buffer[whuuid_length_canonical+1]; // buffer for UUID string
   buffer[whuuid_length_canonical] = 0; // add trailing NULL
   for( int i =0; i < 100; ++i )
   {// generate 100 UUIDs to print them
       whuuid_fill_rand( &u, &st ); // generate UUID using st->rand()
       whuuid_to_string( &u, buffer );
       puts(buffer);
   }
   st.cleanup(&st); // see below.
   @endcode

   In that particular case the state object has no state which
   needs cleaning, but we could also set up a FILE as an input source,
   in which case we need to clean up the object:

   @code
   st = whuuid_rng_FILE;
   st.impl = fopen("/dev/urandom", "r");
   ... use st ...
   st.cleanup(&st); // will fclose() the file
   @endcode

   If a state object is dynamically allocated then it should be freed
   after calling its cleanup() member to free any
   implementation-specific resources.
*/
struct whuuid_rng
{
    /**
       Must set *tgt to sizeof(unsigned int) random bytes. Must return
       0 on success or non-zero if something goes wrong (e.g. the
       input source has failed or run out of numbers). How it uses (or
       ignores) the self argument is implementation-specific.
    */
    int (*rand)( struct whuuid_rng * self, unsigned int  * tgt );
    /**
       Must clean up self, but not free self itself. How it does this
       is implementation-specific. If it has no private state,
       this function may be NULL.

       whuuid_rng objects can be allocated on the stack or via
       arbitrary mechanisms, so the cleanup routine must not free the
       self object. How it is freed (after it is cleaned up) depends
       on how it was allocated.
    */
    void (*cleanup)( struct whuuid_rng * self );
    /**
       Implementations may store any private state here. This member is
       not for public use.
    */
    void * impl;
    /**
       Stores the distribution of values created by this state
       object. whuuid_fill_rand() updates these values.
    */
    unsigned long distribution[whuuid_length_bytes];
};


/** Convenience typedef. */
typedef struct whuuid_rng whuuid_rng;

/**
   A zero-initialized whuiid_state initialization object.
*/
extern const whuuid_rng whuuid_rng_empty;

/**
   An almost-empty whuiid_state initialization object with
   its rand() member set to whuuid_lc_rand.
*/
extern const whuuid_rng whuuid_rng_lcrng;

/**
   A whuuid_state initialization object with its rand() member set to
   whuuid_FILE_rand and its cleanup() member set to
   whuuid_FILE_cleanup.  Clients may copy this then set the impl
   member to point it to an opened FILE handle. The FILE handle will
   be closed when the cleanup() member is called. If the state object
   should not close the file when it cleans up, set the cleanup()
   member to NULL.
*/
extern const whuuid_rng whuuid_rng_FILE;

/**
   Implements the whuuid_rng::rand() interface.

   This implementaion uses/abuses st->impl to store a numeric state
   value for a linear congruent RNG. If st->impl is NULL then a seed
   value is generated using some external source (we malloc() a few
   bytes to get a random address, and we use that address as a
   seed). The state value is stored directly in st->impl and does not
   need to be cleaned up. (The memory malloc()ed to get the initial
   seed is free()d immediately after it is malloc()ed.)

   Returns 0 on success, non-zero on error. The only error conditions
   are !st or !tgt. A malloc() error on the initial seeding will not
   cause an error (but causes a determinate (but unspecified) seed
   value to be used).

   In my (informal/unscientific) tests, this RNG works very well for
   generating UUIDs, out-performing /dev/urandom in terms of even
   numeric distribution most of the time.
*/
int whuuid_lc_rand( whuuid_rng * st, unsigned int *tgt );

/**
   Implements the whuuid_rng::rand() interface.

   If st->impl is not NULL it is assumed to be-a (FILE*) and
   sizeof(unsigned int) bytes are read from it and returned via the
   tgt argument.

   Returns non-zero if !st or !st->impl, or if reading from the file
   fails.

   Results are undefined if st->impl is non-null but is-not-a FILE.

   Note that this implementation does nothing fancy like buffering
   some larger amount of random input. Each call reads sizeof(int)
   bytes. If performance is of a concern, create an implementation
   which stores a struct containing the FILE and the buffer somewhere
   in st->impl and reads the input in larger blocks. Also implement a
   cleanup function which can free the buffer.

   @see whuuid_FILE_cleanup()
   @see whuuid_rng_FILE
*/
int whuuid_FILE_rand( whuuid_rng * st, unsigned int * tgt );

/**
   Implements the whuuid_rng::cleanup() interface for state
   objects where obj->impl is-a FILE handle opened via
   fopen() (or equivalent).
   
   Assumes self->impl is-a (FILE*) and calls fclose() on it.
*/
void whuuid_FILE_cleanup( whuuid_rng * self );

/**
   Converts src->bytes to a canonical-form UUID string.  dest must be
   valid memory at least whuuid_length_canonical bytes long, and on
   success exactly whuuid_length_canonical bytes will be written to it.
   No terminating null is added.

   Returns 0 on success, non-zero on error. The only error conditions
   are (!src) or (!dest).
*/
int whuuid_to_string( whuuid_t const * src, char * dest );

/**
   Populates all of dest->bytes, using st->rand() to collect the
   random bytes. It calls st->rand() enough times to collect
   whuuid_length_bytes bytes.

   Returns 0 on success, non-0 on error. The error conditions are:

   - !st or !dest

   - st->rand() returns non-0, in which case that error code is passed
   back to the caller.

   st->distribution is modified by this function to record the number
   of times any given digit (hex 0..f) is generated via a call to
   rand() (but note that each call to st->rand() is used to generate
   (sizeof(unsigning int)*2) digits).

   This routine does not guaranty that the bytes returned by
   st->rand() are used in the exact same order as they are returned.
*/
int whuuid_fill_rand( whuuid_t * dest, whuuid_rng * st );

/**
   Copies whuuid_length_bytes bytes from src to dest->bytes.

   Returns 0 on success. The only error cases are !dest or !src.
*/
int whuuid_fill( whuuid_t * dest, unsigned char const * src );


/**
   Compares lhs->bytes and rhs->bytes and
   returns 0, less than 0, or greater than 0 depending on whether
   lhs equals, is less than, or is greater to rhs, respectively.
   i.e. it behaves like memcmp(3).

   A NULL value for lhs or rhs compares as less-than any other value
   except NULL, to which it compares equal.
*/
short whuuid_compare( whuuid_t const * lhs, whuuid_t const * rhs );

/**
   Debugging/testing function which dumps the RNG distribution counts
   of st to the given FILE handle. The stats are updated on each call
   to whuuid_fill_rand() IF the WHUUID_CONFIG_KEEP_METRICS macro is
   set to a true value when the library is built.

   If full is non-zero then a full list of metrics is dumped,
   otherwise just an overview.

   Returns 0 on success, non-zero on error (!dest, !st, or
   WHUUID_CONFIG_KEEP_METRICS is false).
*/
int whuuid_dump_distribution( whuuid_rng const * st, short full, FILE * dest );

#endif /* WANDERGINHORSE_NET_WHUUID_H_INCLUDED */
/* end file cgi/whuuid.h */
/* begin file cgi/whuuid.c */
#include <assert.h>
#include <string.h> /* memset() */

#include <stdlib.h> /* malloc(), free() */


#if WHUUID_CONFIG_KEEP_METRICS
#  include <stdio.h> /* fprintf(), FILE */
#endif

const whuuid_t whuuid_t_empty = {
{0,0,0,0,
 0,0,0,0,
 0,0,0,0,
 0,0,0,0}/*bytes*/
};


static void whuuid_noop_cleanup( whuuid_rng * self )
{
    /* does nothing */
}
/**
   An almost-empty-initialized whuuid_rng object which uses
   whuuid_rand_uuint() as its random data source. It has no resources
   associated with it.
*/
const whuuid_rng whuuid_rng_empty = {
NULL/*rand*/,
whuuid_noop_cleanup/*cleanup*/,
NULL/*impl*/,
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}/*distribution*/
};

const whuuid_rng whuuid_rng_lcrng = {
whuuid_lc_rand/*rand*/,
whuuid_noop_cleanup/*cleanup*/,
NULL/*impl*/,
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}/*distribution*/
};

const whuuid_rng whuuid_rng_FILE = {
whuuid_FILE_rand/*rand*/,
whuuid_FILE_cleanup/*cleanup*/,
NULL/*impl*/,
{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}/*distribution*/
};

/** BITS2CHAR(X) expects (X<=15). Returns the hex-code char for it
    ('0'..'f'), or 0 if X is out of range. */
#define BITS2CHAR(X) ( ((X)<=0x09) ? ('0'+(X)) : (((X)<=0xF) ? ('a'+((X)-10)) : 0))


void whuuid_FILE_cleanup( whuuid_rng * self )
{
    if( self && self->impl )
    {
        fclose( (FILE*)self->impl );
        self->impl = 0;
    }
}

int whuuid_FILE_rand( whuuid_rng * st, unsigned int * tgt )
{
    if( st && st->impl )
    {
        unsigned int d = 0;
        if( 1 != fread( &d, sizeof(d), 1, (FILE*)st->impl ) )
        {
            return -1;
        }
        *tgt = d;
        return 0;
    }
    return -1;
}

#include <time.h>
int whuuid_lc_rand( whuuid_rng * st, unsigned int  * tgt )
{
    typedef unsigned long NumType;
    NumType num = (NumType)st->impl;
    if( ! st || ! tgt ) return -1;
#define RNG(SEED) (NumType)( (NumType)((NumType)(SEED) * (NumType)1103515245) + 12345)
    /* ^^^^^ This RNG Works very well for this use case (comparable
       with /dev/urandom on my box). Algo found in Angband sources. */
    if( ! num )
    {
        void * x;
        num = (NumType) st;
        /* Generate a unique seed. */
        x = malloc( (num % 13)+9 );
        free(x);
        num = (NumType)(RNG(x) ^ num) >> 6
            /*
              The bitshift part is to work around the problem that the
              left-most byte of generated UUIDs always have the same
              starting sequences.
             */
            ;
    }
    else
    {
        num = RNG(num);
    }
#undef RNG
    st->impl = (void *)num;
    *tgt = num;
    return 0;
}

int whuuid_to_string( whuuid_t const * src, char * dest )
{
    unsigned int i = 0;
    int part = 1;
    int span = 0;
    char byte = 0;
    char nibble = 0;
    if( ! src || ! dest ) return -1;
    for( i = 0; i < whuuid_length_bytes; )
    {
        int x;
        if( 1 == part ) span = 8;
        else if( (part>1) && (part<5) ) span = 4;
        else if( 5 == part ) span = 12;
        for( x = 0; x < (span/2); ++x )
        {
            byte = src->bytes[i++];
            nibble = (byte >> 4) & 0x0F;
            *(dest++) = BITS2CHAR(nibble);
            nibble = (byte & 0x0F);
            *(dest++) = BITS2CHAR(nibble);
        }
        if( part < 5 )
        {
            *(dest++) = '-';
            ++part;
        }
        else break;
    }
    return 0;
}

int whuuid_fill( whuuid_t * dest, unsigned char const * src )
{
    if( ! dest || ! src ) return -1;
    else
    {
        memcpy( dest, src, whuuid_length_bytes );
        return 0;
    }
}

int whuuid_fill_rand( whuuid_t * dest, whuuid_rng * st )
{
    unsigned int i = 0, x = 0;
    unsigned char * c = 0;
    unsigned int r;
    unsigned char nibble;
    int rc = 0;
    if( ! st || ! dest ) return -1;
    if( ! dest ) return -1;
    for( ; i < whuuid_length_bytes; )
    {
        rc = st->rand(st, &r);
        if( rc ) break;
        c = (unsigned char *)&r;
        for( x = sizeof(r); (x > 0) && (i < whuuid_length_bytes); --x, ++i, ++c )
        {
            dest->bytes[i] = *c;
#if WHUUID_CONFIG_KEEP_METRICS
            nibble = (*c >> 4) & 0x0F;
            ++st->distribution[nibble];
            nibble = (*c & 0x0F);
            ++st->distribution[nibble];
#endif
        }
    }
    return rc;
}

short whuuid_compare( whuuid_t const * lhs, whuuid_t const * rhs )
{
    if( ! lhs ) return rhs ? -1 : 0;
    else if( ! rhs ) return 1;
    else if( lhs == rhs ) return 0;
    else
    {
#if 0
        unsigned int i = 0;
        unsigned char const * l = lhs->bytes;
        unsigned char const * r = rhs->bytes;
        unsigned char bl = 0, br = 0; /* current byte of lhs/rhs*/
        unsigned char nl = 0, nr = 0;/* 4-bit part of bl/br*/
        for( ; i < whuuid_length_bytes; ++i )
        {
            bl = l[i];
            br = r[i];
            nl = (bl >> 4);
            nr = (br >> 4);
            if( nl < nr ) return -1;
            else if( nl > nr ) return 1;
            nl = (bl & 0x0F);
            nr = (br & 0x0F);
            if( nl < nr ) return -1;
            else if( nl > nr ) return 1;
        }
        return 0;
#else
        return memcmp( lhs->bytes, rhs->bytes, whuuid_length_bytes );
#endif
    }
}

int whuuid_dump_distribution( whuuid_rng const * st, short full, FILE * dest )
{
#if ! WHUUID_CONFIG_KEEP_METRICS
    fprintf("WHUUID_CONFIG_KEEP_METRICS is false, so whuuid_dump_distribution() cannot work!\n");
    return -1;
#else
    unsigned short i = 0;
    double total = 0;
    unsigned long int max = 0, min = st->distribution[0];
    unsigned long int x = 0;
    char minL = 0, maxL = 0;
    if( full )
    {
        fprintf(dest,"Random number distribution:\nDigit:\tCount:\n");
    }
    for( ; i < 16; ++i )
    {
        x = st->distribution[i];
        total += x;
        if( max < x )
        {
            max = x;
            maxL = BITS2CHAR(i);
        }
        else if( min >= x )
        {
            min = x;
            minL = BITS2CHAR(i);
        }
    }
    if( full )
    {
        for( i = 0; i < 16; ++i )
        {
            x = st->distribution[i];
            fprintf(dest,"%c\t%lu (%0.6f%%)\n",
                    BITS2CHAR(i),
                    x, (x/ total) *100 );
        }
    }
    fprintf(dest,"Least Hits: '%c' (%lu)\nMost Hits: '%c' (%lu)\n",
           minL, min, maxL, max );
    if( max == min )
    {
        fprintf(dest,"Least==Most == best possible random distribution!\n" );
    }
    else
    {
        fprintf(dest,"Max-Min diff = %lu (%0.4f%% of Max)\n", max - min, ((max - min)/(double)max)*100 );
    }
    fprintf(dest,"Total random 4-bit UUID digits: %0.0f\n\n",total);
    return 0;
#endif
}

#undef BITS2CHAR
/* end file cgi/whuuid.c */
/* begin file cgi/cson_cgi.c */
#include <assert.h>
#include <stdlib.h> /* environ, getenv(), atexit() */
#include <ctype.h> /* isspace() */
#include <string.h> /* strlen() */
#include <stdarg.h>
#include <time.h>
#include <locale.h> /* setlocale(), needed for JSON parser. */

#define CSON_CGI_USE_SIGNALS 1

/* If RNG_FILENAME evaluates to true then we use that file for getting
   random bytes for session IDs. FIXME: we effectively leak a file
   handle if this is enabled.
*/
#if 0
#  define RNG_FILENAME "/dev/urandom"
#else
#  define RNG_FILENAME NULL
#endif


#if 1
#define MARKER if(1) printf("MARKER: %s:%d:%s():\t",__FILE__,__LINE__,__func__); if(1) printf
#else
static void noop_printf(char const * fmt, ...) {}
#define MARKER if(0) printf
#endif

#if CSON_CGI_USE_SIGNALS
#  include <signal.h> /* signal() */
#endif

const cson_cgi_init_opt cson_cgi_init_opt_empty = cson_cgi_init_opt_empty_m;

/**
   Some cson_cgi-internal value keys.
*/
static const struct {
    char const * ENV_GET;
    char const * ENV_POST;
    char const * ENV_COOKIE;
    char const * ENV_SYS;
    char const * ENV_APP;
    char const * ENV_ARGV;
    char const * ENV_CONFIG;
    char const * ENV_SESSION;
    char const * RESPONSE_HEADERS;
} cson_cgi_keys = {
"$GET",
"$POST",
"$COOKIE",
"$ENV",
"$APP",
"$ARGV",
"$CONFIG",
"$SESSION",
"response.headers"
};


/**
   Shared state used by the cson_cgi API.
*/
const cson_cgi_cx cson_cgi_cx_empty = cson_cgi_cx_empty_m;

static int cson_cgi_printf(cson_cgi_cx * cx, char const * fmt, ... )
{
    if( ! fmt ) return 0;
    else
    {
        int rc;
        va_list vargs;
        assert( NULL != cx->opt.outStream );
        va_start( vargs, fmt );
        rc = vfprintf( cx->opt.outStream, fmt, vargs );
        /*if( rc > 0 ) fflush( cx->opt.outStream );*/
        va_end( vargs );
        return rc;
    }
}

static int cson_cgi_puts(cson_cgi_cx * cx, char const * str)
{
    size_t const slen = str ? strlen(str) : 0;
    if( slen )
    {
        if( 1 != fwrite( str, slen, 1, cx->opt.outStream ) )
        {
            return -1;
        }
    }
    if( 1 != fwrite( "\n", 1, 1, cx->opt.outStream ) )
    {
        return -2;
    }
    return (int) (slen + 1);
}

static int cson_cgi_putchar(cson_cgi_cx * cx, char ch)
{
    return ( 1 == fwrite( &ch, 1, 1, cx->opt.outStream ) )
        ? 1
        : -1;
}


cson_value * cson_cgi_argv(cson_cgi_cx *cx)
{
    return cx ? cx->argv.jval : NULL;
}

cson_array * cson_cgi_argv_array(cson_cgi_cx * cx)
{
    return cx ? cson_value_get_array( cx->argv.jval ) : NULL;
}

int cson_cgi_gc_add( cson_cgi_cx * cx, char const * key, cson_value * v, char freeOnError )
{
    int const rc = cson_object_set( cx->gc.jobj, key, v );
    if( (0 != rc) && freeOnError )
    {
        cson_value_free( v );
    }
    return rc;
}

int cson_cgi_response_root_set( cson_cgi_cx * cx, cson_value * v )
{
    if( ! cx ) return cson_rc.ArgError;
    else if( v && !cson_value_is_object(v) && !cson_value_is_array(v) )
    {
        return cson_rc.TypeError;
    }
    else if( cx->response.root != v )
    {
        int rc = 0;
        rc = cson_cgi_gc_add(cx, "response.root", v, 0 )
            /** TODO: confirm that cson_object_set() does not
                clean up the original object if insertion fails.
                If it does, we've just hosed the root node.
            */
            ;
        if( 0 != rc )
        {
            return rc;
        }
        else
        {
            cx->response.root = v;
            return 0;
        }
    }
    else
    {
        return 0;
    }
    
}
cson_value * cson_cgi_response_root_get( cson_cgi_cx * cx, char createMode )
{
    if( ! cx ) return NULL;
    else if( cx->response.root ) return cx->response.root;
    else
    {
        if( 0 != createMode )
        {
            if( createMode > 0 )
            {
                cx->response.root = cson_value_new_object();
            }
            else if( createMode < 0 )
            {
                cx->response.root = cson_value_new_array();
            }
            if( cx->response.root &&
                (0 != cson_cgi_gc_add(cx, "response.root", cx->response.root, 1 )) )
            {
                cx->response.root = NULL /* was cleaned up by cson_cgi_gc_add() */;
            }
        }
        return cx->response.root;
    }
}


/** @internal

Tokenizes an input string on a given separator. Inputs are:

- (inp) = is a pointer to the pointer to the start of the input.

- (separator) = the separator character

- (end) = a pointer to NULL. i.e. (*end == NULL)

This function scans *inp for the given separator char or a NULL char.
Successive separators at the start of *inp are skipped. The effect is
that, when this function is called in a loop, all neighboring
separators are ignored. e.g. the string "aa.bb...cc" will tokenize to
the list (aa,bb,cc) if the separator is '.' and to (aa.,...cc) if the
separator is 'b'.

Returns 0 (false) if it finds no token, else non-0 (true).

Output:

- (*inp) will be set to the first character of the next token.

- (*end) will point to the one-past-the-end point of the token.

If (*inp == *end) then the end of the string has been reached
without finding a token.

Post-conditions:

- (*end == *inp) if no token is found.

- (*end > *inp) if a token is found.

It is intolerant of NULL values for (inp, end), and will assert() in
debug builds if passed NULL as either parameter.

When looping, one must be sure to re-set the inp and end
parameters. For example:

@code
char const * head = input;
char const * tail = NULL;
while( cson_cgi_next_token( &inp, '/', &tail ) ) {
  ...
  head = tail;
  tail = NULL;
}
@endcode

If the loop calls 'continue', it must be careful to
ensure that the parameters are re-set, to avoid an endless
loop. This can be simplified with a goto:

@code
while( cson_cgi_next_token( &inp, '/', &tail ) ) {
  if( some condition ) {
     ... do something ...
     goto next_iter;
  }
  else {
    ....
  }
  next_iter;
  head = tail;
  tail = NULL;
}
@endcode

*/
char cson_cgi_next_token( char const ** inp, char separator, char const ** end )
{
    char const * pos = NULL;
    assert( inp && end && *inp );
    if( ! inp || !end ) return 0;
    else if( *inp == *end ) return 0;
    pos = *inp;
    if( !*pos )
    {
        *end = pos;
        return 0;
    }
    for( ; *pos && (*pos == separator); ++pos) { /* skip preceeding splitters */ }
    *inp = pos;
    for( ; *pos && (*pos != separator); ++pos) { /* find next splitter */ }
    *end = pos;
    return (pos > *inp) ? 1 : 0;
}

/**
   If map->jval is NULL then map->jval is created using
   cson_value_new_object() and map->jobj is assigned to its object
   reference. The newly-created map->jval is appended to
   cx->gc to ensure that map->jval lives a full life (as
   opposed to potentially being prematurly GC'd if a client later adds
   map->jval to his own container).

   If map->jval is not NULL then this function is a no-op.

   This function will assert() if map is NULL.

   Returns 0 on success, else cson_rc.AllocError. On error map->jval
   will be NULL after this call.

   On success, ownership of map->jval is transfered to (or potentially
   shared with) cx->gc.
*/
static int cson_cgi_init_env_map( cson_cgi_cx * cx, char const * gckey, cson_cgi_env_map * map )
{
    int rc = 0;
    assert( NULL != map );
    if( NULL == map->jval )
    {
        assert( NULL == map->jobj );
        map->jval = cson_value_new_object();
        if( NULL == map->jval ) return cson_rc.AllocError;
        rc = cson_cgi_gc_add( cx, gckey, map->jval, 1 )
            /* We do this to avoid a corner case in cleanup logic
               if the client stores this object in another container.
            */;
        if( 0 != rc )
        {
            map->jval = NULL /* was cleaned up by cson_cgi_gc_add() */;
        }
        else
        {
            map->jobj = cson_value_get_object( map->jval );
            assert( NULL != map->jobj );
        }
    }
    return rc;
}

char const * cson_cgi_getenv_cstr( cson_cgi_cx * cx, char const * where, char const * key )
{
    return cson_string_cstr( cson_value_get_string( cson_cgi_getenv(cx, where, key) ) );
}

cson_value * cson_cgi_path_part( cson_cgi_cx * cx, unsigned short ndx )
{
    cson_value * piV = cson_cgi_getenv( cx, "e", "PATH_INFO_SPLIT" );
    if( ! piV ) return NULL;
    else
    {
        unsigned int alen;
        cson_array * ar = cson_value_get_array(piV);
        assert( NULL != ar );
        alen = cson_array_length_get( ar );
        return ( ndx >= alen )
            ? NULL
            : cson_array_get( ar, ndx );
    }
}

char const * cson_cgi_path_part_cstr( cson_cgi_cx * cx, unsigned short ndx )
{
    return cson_string_cstr( cson_value_get_string( cson_cgi_path_part( cx, ndx ) ) );
}

/**
   cson_cgi_hexchar_to_int():

   For 'a'-'f', 'A'-'F' and '0'-'9', returns the appropriate decimal
   number.  For any other character it returns -1.
*/
static int cson_cgi_hexchar_to_int( int ch )
{
    if( (ch>='a' && ch<='f') ) return ch-'a'+10;
    else if( (ch>='A' && ch<='F') ) return ch-'A'+10;
    else if( (ch>='0' && ch<='9') ) return ch-'0';
    return -1;
}

/**

   Replaces %XX patterns in str with their equivalent character and
   '+' characters with a single whitespace. %XX patterns which are
   not hexidecimal values are not translated.

   str must be NULL or a NUL-terminated string. If it is NULL or the
   first byte is NUL then 0 is returned and this function has no
   side-effects.
   
   BUGS(?): URL-decoding might have a few bugs/corner cases.
*/
static int cson_cgi_urldecode_inline( char * str )
{
    unsigned char ch = 0;
    unsigned char cx1 = 0;
    unsigned char cx2 = 0;
    int decoded;
    unsigned char * pos = (unsigned char *)str;
    unsigned char * out = pos;
    unsigned char const * end;
    size_t slen = (str && *str) ? strlen(str) : 0;
    if( !slen ) return 0;
    end = pos + slen;
    for( ; pos < end; ++pos )
    {
        ch = *pos;
        if( ch == '%' )
        {
            cx1 = *(pos+1);
            /* FIXME: with only minor refactoring we can remove the
               isxdigit() calls and use cson_cgi_hexchar_to_int()
               instead, checking for a negative return value. That
               would potentially save us 2 extra function calls here.
             */
            if( isxdigit(cx1) )
            {
                cx2 = *(pos+2);
                if( isxdigit(cx2) )
                {
                    decoded = (cson_cgi_hexchar_to_int( cx1 ) * 16)
                        + cson_cgi_hexchar_to_int( cx2 );
                    *(out++) = (char)decoded;
                    pos += 2;
                    continue;
                }
                /* else fall through... */
            }
            /* else fall through... */
        }
        else if( ch == '+' )
        {
            *(out++) = ' ';
            continue;
        }
        *(out++) = ch;
    }
    *out = 0;
    return 0;
}

/**
   If PATH_INFO is set, this function splits it on '/'
   characters and creates an array out of the elements.
   The array is stored as $ENV["PATH_INFO_SPLIT"].

   Returns non-0 on error. If PATH_INFO is not set,
   0 is returned. If it is set but has no entries,
   an empty array is created.

   A return value of cson_rc.RangeError probably means that a path
   element was longer than our internal buffer size, in which case
   processing ends and PATH_INFO_SPLIT is not set. That error can
   probably be ignored by the caller, but all others are probably
   serious (e.g. AllocError).
*/
static int cson_cgi_import_path_info(cson_cgi_cx *cx)
{
    char const * pi = cson_cgi_getenv_cstr(cx, "e","PATH_INFO");
    if( NULL == pi ) return 0;
    else
    {
        cson_value * arV = cson_value_new_array();
        cson_array * ar;
        char const * head = pi;
        char const * tail = NULL;
        if( ! arV ) return cson_rc.AllocError;
        else
        {
            enum { BufSize = 128 };
            char buf[BufSize];
            cson_value * partV;
            unsigned int slen;
            int rc = 0;
            ar = cson_value_get_array(arV);
            while( cson_cgi_next_token( &head, '/', &tail ) )
            {
                slen = (tail-head);
                if( slen >= BufSize )
                {
                    rc = cson_rc.RangeError;
                    goto end_clean;
                }
                memcpy( buf, head, slen );
                buf[slen] = 0;
                cson_cgi_urldecode_inline( buf );
                partV = cson_value_new_string( buf, strlen(buf) );
                if( ! partV )
                {
                    rc = cson_rc.AllocError;
                    goto end_clean;
                }
                rc = cson_array_append( ar, partV );
                if( rc )
                {
                    cson_value_free( partV );
                    goto end_clean;
                }
                partV = NULL;
                head = tail;
                tail = NULL;
            }
            assert( 0 == rc );
            rc = cson_object_set( cx->request.env.jobj,
                                  "PATH_INFO_SPLIT",
                                  arV );
            end_clean:
            if( rc )
            {
                cson_value_free( arV );
            }
            return rc;
        }
    }
}

/**
   Imports (extern char ** environ) into cx->request.env, initializing
   cx->request.env if needed. If called multiple times the environment
   is re-read each time, but old entries which are no longer in the
   new environment are not removed from cx->request.env.

   Returns 0 on success.
*/
static int cson_cgi_import_environ(cson_cgi_cx * cx)
{
    extern char ** environ;
    int i = 0;
    char const * e = environ[0];
    char const * v = NULL;
    enum { KeyBufSize = 512 };
    char keybuf[KeyBufSize];
    char * kpos = NULL;
    int rc = 0;
    cson_value * jv = NULL;
    rc = cson_cgi_init_env_map( cx, cson_cgi_keys.ENV_SYS, &cx->request.env );
    if( 0 != rc ) return rc;
    for( ; e && *e; e = environ[++i] )
    {
        v = NULL;
        memset( keybuf, 0, KeyBufSize );
        kpos = keybuf;
        for( ; *e && ('=' != *e); ++e )
        {
            *(kpos++) = *e;
            assert( kpos < (keybuf+KeyBufSize) );
            if( kpos >= (keybuf+KeyBufSize) )
            {
                return cson_rc.RangeError;
            }
        }
        if( '=' == *e )
        {
            v = e+1;
        }
        else
        {
            v = "";
        }
        jv = cson_value_new_string( v, strlen(v) );
        if( NULL == jv )
        {
            rc = cson_rc.AllocError;
            break;
        }
        rc = cson_object_set( cx->request.env.jobj, keybuf, jv );
        if( 0 != rc ) break;
    }
    if( 0 == rc )
    {
        rc = cson_cgi_import_path_info(cx);
    }
    return rc;
}

/**
   Tries to save the current session data, if any, using the
   configured session manager.

   Returns 0 on success. If the environment has no session,
   it is treated as success but nothing is actually saved.

   If no session manager has been configured then
   cson_rc.UnsupportedError is returned.
*/
static int cson_cgi_session_save(cson_cgi_cx * cx)
{
    if( ! cx->session.mgr )
    {
        return cson_rc.UnsupportedError;
    }
    else if( !cx->session.id || !cx->session.env.jval )
    {
        return 0;
    }
    else
    {
        return cx->session.mgr->api->save( cx->session.mgr,
                                           cx->session.env.jval,
                                           cx->session.id );
    }
}

cson_cgi_cx * cson_cgi_cx_alloc()
{
    cson_cgi_cx * rc = (cson_cgi_cx *)malloc(sizeof(cson_cgi_cx));
    if( rc )
    {
        *rc = cson_cgi_cx_empty;
        rc->misc.allocStamp = rc;
    }
    return rc;
}

char cson_cgi_cx_clean( cson_cgi_cx * cx )
{
    if( !cx ) return 0;
    else
    {
        void const * allocStamp = NULL;
        if( cx->session.mgr )
        {
            cson_cgi_session_save(cx) /* ignoring error code */;
            cx->session.mgr->api->finalize( cx->session.mgr );
            cx->session.mgr = NULL;
        }
        if(NULL != cx->gc.jval)
        {
            cson_value_free( cx->gc.jval );
            cx->gc.jval = NULL;
            cx->gc.jobj = NULL;
        }
        if( cx->session.id )
        {
            free( cx->session.id );
            cx->session.id = NULL;
        }
        cson_buffer_reserve( &cx->tmpBuf, 0 );
        allocStamp = cx->misc.allocStamp;
        if( cx->opt.inStream && (stdin != cx->opt.inStream) ) fclose(cx->opt.inStream);
        if( cx->opt.outStream && (stderr == cx->opt.outStream) && (stdout != cx->opt.outStream) ) fclose(cx->opt.outStream);
        if( cx->opt.errStream && (stderr == cx->opt.errStream) && (stdout != cx->opt.errStream) ) fclose(cx->opt.errStream);
        *cx = cson_cgi_cx_empty;
        return ( allocStamp == cx )
            ? (free( cx ), 1)
            : 0;
    }
}

cson_value * cson_cgi_env_get_val( cson_cgi_cx * cx, char which, char createIfNeeded )
{
    cson_cgi_env_map * map = NULL;
    cson_value * v = NULL;
    char const * gckey = NULL;
    switch( which )
    {
      case 'c':
      case 'C':
          map = &cx->request.cookie;
          gckey = cson_cgi_keys.ENV_COOKIE;
          break;
      case 'e':
      case 'E':
          gckey = cson_cgi_keys.ENV_SYS;
          map = &cx->request.env;
          break;
      case 'g':
      case 'G':
          gckey = cson_cgi_keys.ENV_GET;
          map = &cx->request.get;
          break;
      case 'f':
      case 'F':
          gckey = cson_cgi_keys.ENV_CONFIG;
          map = &cx->config;
          break;
      case 'p':
      case 'P':
          gckey = cson_cgi_keys.ENV_POST;
          map = &cx->request.post;
          break;
      case 'a':
      case 'A':
          gckey = cson_cgi_keys.ENV_APP;
          map = &cx->clientEnv;
          break;
      case 's':
      case 'S':
          gckey = cson_cgi_keys.ENV_SESSION;
          map = &cx->session.env;
          break;
      default:
          break;
    }
    if( map )
    {
        v = map->jval;
        if( !v && createIfNeeded )
        {
            assert( NULL != gckey );
            cson_cgi_init_env_map( cx, gckey, map );
            v = map->jval;
        }
    }
    return v;
}

cson_object * cson_cgi_env_get_obj( cson_cgi_cx * cx, char which, char createIfNeeded )
{
    return cson_value_get_object( cson_cgi_env_get_val( cx, which, createIfNeeded ) );
}

/**
   Sets a variable in one of the environment objects.

   env must be the conventional character representation
   (case-insensitive) for on of the following environment objects:

   - g = GET
   - p = POST
   - e = ENV
   - c = COOKIE
   - u = USER

   On success 0 is returned and ownership of v is transfered to (or
   shared with) the appropriate environment object. On error non-zero
   is returned and ownership of v is not modified.
*/
static int cson_cgi_setenv_x( cson_cgi_cx * cx, char env, char const * key, cson_value * v )
{
    if( ! key || !*key ) return cson_rc.ArgError;
    else
    {
        cson_object * jo = cson_cgi_env_get_obj( cx, env, 1 );
        return ( NULL == jo )
            ? cson_rc.RangeError /* FIXME: expand the above code so we
                                    can distinguish between invalid
                                    env and allocation error. (Except that
                                    there is no allocation on get_obj().*/
            : cson_object_set( jo, key, v );
    }
}

int cson_cgi_setenv( cson_cgi_cx * cx, char const * key, cson_value * v )
{
    return cson_cgi_setenv_x( cx, 'a', key, v );
}

int cson_cgi_cookie_set( cson_cgi_cx * cx, char const * key, cson_value * v )
{

    if( ! key || !*key ) return cson_rc.ArgError;
    else
    {
        cson_object * jo = cson_cgi_env_get_obj( cx, 'c', 1 );
        return (NULL == jo)
            ? cson_rc.AllocError
            : cson_object_set( jo, key, v ? v : cson_value_null() );
    }
}

int cson_cgi_cookie_set2( cson_cgi_cx * cx,
                          char const * key, cson_value * v,
                          char const * domain, char const * path,
                          unsigned int expires, char secure, char httponly )
{
    if( ! key || !*key ) return cson_rc.ArgError;
    else
    {
        int rc;
        cson_value * jv = cson_value_new_object();
        cson_object * jo = cson_value_get_object(jv);
        cson_value * x = NULL;
        if( ! jo ) return cson_rc.AllocError;
        if( ! v ) v = cson_value_null() /* reminder: does not allocate */;

#define SET(KEY) if( 0 != (rc = cson_object_set( jo, KEY, x) ) ) {      \
            cson_value_free(x); \
            cson_value_free( jv ); \
            return rc; \
        }

        if( NULL != domain )
        {
            x = cson_value_new_string( domain, strlen(domain) );
            SET("domain");
        }
        if( NULL != path )
        {
            x = cson_value_new_string( path, strlen(path) );
            SET("path");
        }

        if( cson_value_is_null(v) )
        {
            x = cson_value_new_integer( 1 );
            SET("expires");
        }
        else if( expires )
        {
            x = cson_value_new_integer( (cson_int_t) expires );
            SET("expires");
        }
        if( secure )
        {
            x = cson_value_new_bool(secure);
            SET("secure");
        }
        if( httponly )
        {
            x = cson_value_new_bool(httponly);
            SET("httponly");
        }
#undef SET
        rc = cson_cgi_cookie_set( cx, key, jv );
        if( 0 != rc )
        {
            cson_value_free( jv );
        }
        else
        { /* set "value" last so that we can avoid tricky
             ownership/lifetime problems in error cases.
          */
            if( 0 != (rc = cson_object_set( jo, "value", v) ) )
            { /* remove the cookie. Note that this particular case
                 does not remove it from the HTTP client. In order to do that
                 we have to keep the existing path/domain/etc info.
              */
                cson_object * cookies = cson_cgi_env_get_obj( cx, 'c', 0 );
                if( cookies )
                {
                    cson_object_set( cookies, key, cson_value_null() )
                        /* Ignore error code, since we have no fallback
                           and cson_value_null() does not allocate.
                           Worst-case is that removing it fails, but when we
                           emit the cookie headers that cookie will be skipped
                           because it has no "value" field.
                        */
                        ;
                }
            }
        }
        return rc;
    }
}

cson_value * cson_cgi_getenv( cson_cgi_cx * cx, char const * fromWhere, char const * key )
{
    cson_value * jv = NULL;
    cson_object * map = NULL;
    if( (NULL == fromWhere) || !*fromWhere ) fromWhere = CSON_CGI_GETENV_DEFAULT;
    if( !key || !*key ) return NULL;
    for( ; *fromWhere ; ++fromWhere )
    {
        map = cson_cgi_env_get_obj( cx, *fromWhere, 0 );
        if( (NULL == map) && (('r'==*fromWhere)||('R'==*fromWhere)) )
        {
            jv = cson_cgi_getenv( cx, "gpc", key );
        }
        if( NULL != jv ) /* only in 'R' case */ break;
        else if( NULL == map ) continue /* invalid character or NULL map */;
        jv = cson_object_get( map, key );
        if( NULL != jv ) break;
    }
    return jv;
}


int cson_cgi_response_header_add( cson_cgi_cx * cx, char const * key, cson_value * v )
{
    int rc = 0;
    if( !cx || ! key || !*key ) return cson_rc.ArgError;
    rc = cson_cgi_init_env_map( cx, cson_cgi_keys.RESPONSE_HEADERS, &cx->response.headers );
    if( 0 == rc )
    {
        assert( NULL != cx->response.headers.jobj );
        rc = cson_object_set( cx->response.headers.jobj, key, v );
    }
    return rc;
}


char cson_cgi_is_jsonp(cson_cgi_cx * cx)
{
    if( ! cx ) return 0;
    else if( cx->misc.isJSONP < 0 )
    { /* guess */
        cx->misc.isJSONP = (NULL == cson_cgi_getenv( cx, "agp", CSON_CGI_KEY_JSONP ))
            ? 0 : 1;
    }
    return cx->misc.isJSONP;
}

void cson_cgi_enable_jsonp( cson_cgi_cx * cx, char b )
{
    if( cx ) cx->misc.isJSONP = b ? 1 : 0;
}

char const * cson_cgi_guess_content_type(cson_cgi_cx * cx)
{
    char const * cset;
    char doUtf8;
    cset = getenv("HTTP_ACCEPT_CHARSET");
    doUtf8 = ((NULL == cset) || (NULL!=strstr("utf-8",cset)))
        ? 1 : 0;
    if( cson_cgi_is_jsonp(cx) )
    {
        return doUtf8
            ? "application/javascript; charset=utf-8"
            : "application/javascript";
    }
    else
    {
        /*
          Content-type

          If the browser does not sent an ACCEPT for application/json
          then we fall back to text/plain.
        */
        char const * cstr;
        cstr = getenv("HTTP_ACCEPT");
        if( NULL == cstr )
        {
            return doUtf8
                ? "application/json; charset=utf-8"
                : "application/json";
        }
        else
        {
            if( strstr( cstr, "application/json" )
                || strstr( cstr, "*/*" ) )
            {
                return doUtf8
                    ? "application/json; charset=utf-8"
                    : "application/json";
            }
            else
            {
                return "text/plain";
            }
        }
    }
}


/**
   URL-encodes src to dest and NUL-terminates it. dest must be at
   least *destLen bytes long. Upon a successful return, *destLen
   will be modified to hold the new string's length.

   Returns 0 on success. On error dest might be partially populated.

   Returns cson_rc.RangeError if dest is not long enough to hold
   the conversion and a terminating NUL.
*/
static int cson_cgi_urlencode( char const * src, char * dest_, size_t * destLen )
{
#define needs_escape \
    ( (ch >= 32 && ch <=47)                       \
      || ( ch>=58 && ch<=64)                      \
      || ( ch>=91 && ch<=96)                      \
      || ( ch>=123 && ch<=126)                    \
      || ( ch<32 || ch>=127)                      \
      )
    char const * pos = src;
    char ch;
    size_t dpos = 0;
    char * dest = dest_;
    static char const * hex = "0123456789ABCDEF";
    if( ! dest || !destLen ) return cson_rc.RangeError;
    for( ; pos && *pos; ++pos )
    {
        ch = *pos;
        if( ! needs_escape )
        {
            if( ++dpos >= *destLen ) return cson_rc.RangeError;
            *(dest++) = ch;
            continue;
        }
        else
        {
            if( (dpos+=3) >= *destLen ) return cson_rc.RangeError;
            *(dest++) = '%';
            *(dest++) = hex[((ch>>4)&0xf)];
            *(dest++) = hex[(ch&0xf)];
        }
    }
    if( ++dpos >= *destLen ) return cson_rc.RangeError;
    *dest = 0;
    *destLen = dest - dest_;
    return 0;
#undef needs_escape
}

/**
   If orig is one of the types (string,double,bool,undef,null) then
   a pointer to its string representation is returned, else NULL
   is returned.

   For non-string types, dest must be at least destLen bytes of memory, and
   if destLen is not long enough to hold the string form then NULL is returned.

   On success a pointer to a string is returned. It will be one of:

   - if orig is-a string then it's underlying string.

   - for (double,integer,bool,undef,null), dest will be returned. The encoded
   form is decimal for (double,integer), the number 0 or 1 for bool, and the
   number 0 for (undef,null).

   Ownership of dest is not modified by this call.

   The returned value is valid until either orig or dest are modified.

   On error dest is not modified. Dest is also not modified if orig
   is-a string, as its own string bytes are returned instead.
*/
static char const * cson_cgi_pod_to_string( cson_value const * orig,
                                            char * dest, unsigned int destLen )
{
    if( ! orig || !dest || !destLen ) return NULL;
    else
    {/* FIXME? use cson's output support for the numeric types. i
        _think_ those bits might not be in the public API, though.
        We could use it for serializing objects/arrays, in any case.
      */
        enum { NumBufSize = 80 };
        if( cson_value_is_string(orig) )
        {
            cson_string const * jstr = cson_value_get_string(orig);
            assert( NULL != jstr );
            return cson_string_cstr( jstr ); 
        }
        else if( cson_value_is_integer(orig) )
        {
            char tmp[NumBufSize] = {0};
            int const sc = sprintf( tmp, "%"CSON_INT_T_PFMT, cson_value_get_integer(orig));
            if( sc <= 0 ) return NULL;
            else if( (unsigned int)sc >= destLen ) return NULL;
            else
            {
                strcpy( dest, tmp );
                return dest;
            }
        }
        else if( cson_value_is_double(orig) )
        {
            char tmp[NumBufSize] = {0};
            int const sc = sprintf( tmp, "%"CSON_DOUBLE_T_PFMT, cson_value_get_double(orig));
            if( sc <= 0 ) return NULL;
            else if( (unsigned int)sc >= destLen ) return NULL;
            else
            {
                strcpy( dest, tmp );
                if(1)
                { /* Strip trailing zeroes... */
                    unsigned int urc = strlen(dest);
                    char * pos = dest + urc - 1;
                    for( ; ('0' == *pos) && urc && (*(pos-1) != '.'); --pos, --urc )
                    {
                        *pos = 0;
                    }
                    assert(urc && *pos);
                }
                return dest;
            }
        }
        else if( cson_value_is_bool( orig ) )
        {
            char const bv = cson_value_get_bool(orig);
            if( destLen < 2 ) return NULL;
            *dest = bv ? '1' : '0';
            *(dest+1) = 0;
            return dest;
        }
        else if( cson_value_is_null( orig ) || cson_value_is_undef( orig ) )
        {
            if( destLen < 2 ) return NULL;
            *dest = '0';
            *(dest+1) = 0;
            return dest;
        }
        else
        {
            return NULL;
        }
    }
}


/**
   Writes an RFC822 timestamp string to dest, which must be at least destLen bytes long.
   On success returns dest, else NULL. destLen must be at least 31.
*/
static char * cson_cgi_rfc822_timedate( time_t now, char * dest, unsigned int destLen )
{
    static const char * dayNames[] = 
        {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
         0 };
    static const char * monthNames[] =
        {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
         0};

    struct tm * t = (dest && (destLen>30)) ? gmtime(&now) : NULL;
    if( ! t || (destLen<31) ) return NULL;
    else
    {
        int const rc = sprintf( dest,
                                "%s, %d %s %02d %02d:%02d:%02d GMT",
                                dayNames[t->tm_wday], t->tm_mday,
                                monthNames[t->tm_mon],
                                t->tm_year+1900, t->tm_hour,
                                t->tm_min, t->tm_sec
                                );
        assert( (rc>0) && ((unsigned int)rc) < destLen );
        return dest;
    }
}

/**
   Outputs the cookie-specific HTTP headers.

   Returns 0 on success.
*/
static int cson_cgi_response_output_cookies(cson_cgi_cx * cx)
{
    cson_kvp * kvp = NULL;
    cson_object * jo = NULL;
    cson_object_iterator iter = cson_object_iterator_empty;
    assert(cx);
    jo = cx->request.cookie.jobj;
    if( ! jo ) return 0;
    else
    {
        enum { CookieBufSize = 1024 * 8,
               ValBufSize = 1024 * 4,
               TSBufSize = 32
        };
        char cookieBuf[CookieBufSize] = {0} /* buffer for whole cookie string */;
        char valBuf[ValBufSize] = {0} /* buffer for value encoding */;
        char urlBuf[ValBufSize] = {0} /* buffer for urlencoding */;
        char tsBuf[TSBufSize] = {0} /* buffer for expiry timestamp */;
        int rc = cson_object_iter_init( jo, &iter );
        assert( CookieBufSize > ValBufSize );
        if( 0 != rc ) return rc;
        while( (kvp = cson_object_iter_next(&iter)) )
        {
            cson_string const * key = cson_kvp_key(kvp);
            cson_value const * val = cson_kvp_value(kvp);
            if( cson_value_is_null(val) )
            {
                cson_cgi_printf(cx,"Set-Cookie: %s=null; expires=Thu, 01-Jan-1970 00:00:01 GMT\r\n", cson_string_cstr(key));
                continue;
            }
            if( cson_value_is_object(val) )
            {
                /*
                  Accept in Object in the form:

                  {
                  value: VALUE,
                  domain: string,
                  path: string,
                  secure: bool,
                  httponly: bool,
                  expires: integer
                  }
                 */
                cson_object const * obj = cson_value_get_object( val );
                cson_value const * cv = cson_object_get( obj, "value" );
                char const * valstr = NULL;
                char const isNull = !cv || cson_value_is_null( cv );
                if( isNull )
                {
                    cson_cgi_printf(cx, "Set-Cookie: %s=0", cson_string_cstr(key));
                }
                else
                {
                    /* FIXME: streamify urlencode so we can get around fixed buffer size. */
                    valstr = cson_cgi_pod_to_string( cv, valBuf, ValBufSize );
                    if( ! valstr ) continue;
                    else
                    {
                        size_t bSize = ValBufSize;
                        memset( urlBuf, 0, ValBufSize );
                        if( 0 != cson_cgi_urlencode( valstr, urlBuf, &bSize ) )
                        {
                            /* buffer is too small. Skip it. */
                            continue;
                        }
                        assert( bSize <= ValBufSize );
                        cson_cgi_printf(cx, "Set-Cookie: %s=%s", cson_string_cstr(key), urlBuf);
                    }
                }

#define DOPART(KEY,KEY2) cv = cson_object_get( obj, KEY );  \
                if( cv ) { \
                    valstr = cson_cgi_pod_to_string( cv, valBuf, ValBufSize ); \
                    if( valstr ) { \
                        cson_cgi_printf( cx, "; "KEY2"=%s", valstr );  \
                    } } (void)0
                DOPART("domain","Domain");
                DOPART("path","Path");
#undef DOPART

                cv = cson_object_get( obj, "expires" );
                if( cv || isNull )
                {
                    cson_int_t const intVal = isNull ? 1 : cson_value_get_integer(cv);
                    if( intVal )
                    {
                        valstr = cson_cgi_rfc822_timedate( (time_t)intVal, tsBuf, TSBufSize );
                        if( valstr )
                        {
                            cson_cgi_printf( cx, "; Expires=%s", valstr );
                        }
                    }
#if 0
                    else if( cson_value_is_string(cv) )
                    {
                        /* TODO?: assume it's already propery formatted. */
                    }
                    else
                    {
                        /* skip it.*/
                    }
#endif
                }
                cv = cson_object_get( obj, "secure" );
                if( cson_value_get_bool(cv) )
                {
                    cson_cgi_printf( cx, "; Secure" );
                }
                
                cv = cson_object_get( obj, "httponly" );
                if( cson_value_get_bool(cv) )
                {
                    cson_cgi_printf( cx, "; HttpOnly" );
                }
                cson_cgi_puts(cx, "\r");
            }
            else
            {
                char const * valstr;
                memset( valBuf, 0, ValBufSize );
                valstr = cson_cgi_pod_to_string( val, valBuf, ValBufSize );
                if( ! valstr ) continue;
                else
                {
                    size_t bSize = CookieBufSize;
                    memset( cookieBuf, 0, CookieBufSize );
                    rc = cson_cgi_urlencode( valstr, cookieBuf, &bSize );
                    if( 0 != rc )
                    {
                        /* too beaucoup. skip it */
                        continue;
                    }
                    assert( bSize < CookieBufSize );
                    cson_cgi_printf(cx,"Set-Cookie: %s=%s\r\n", cson_string_cstr(key), cookieBuf);
                }
            }
        }
        return 0;
    }

}
int cson_cgi_response_output_headers(cson_cgi_cx * cx)
{
    enum { BufSize = 64 };
    cson_object * jo = NULL;
    int rc;
    rc = cson_cgi_printf(cx, "Content-type: %s\r\n", cson_cgi_guess_content_type(cx) );
    if( rc <= 0 ) return rc;
    rc = cson_cgi_puts(cx, "Status: 200 OK\r");
    if( rc <= 0 ) return rc;
    jo = cx->response.headers.jobj;
    if( jo )
    {
        char buf[BufSize] = {0};
        cson_object_iterator iter = cson_object_iterator_empty;
        cson_kvp * kvp;
        cson_string const * key;
        cson_value const * val;
        char const * valcstr;
        rc = cson_object_iter_init( jo, &iter );
        if( 0 != rc ) return rc;
        while( (kvp = cson_object_iter_next(&iter)) )
        {
            key = cson_kvp_key(kvp);
            val = cson_kvp_value(kvp);
            valcstr = cson_cgi_pod_to_string( val, buf, BufSize );
            if( ! valcstr ) continue;
            assert( NULL != key );
            assert( NULL != val );
            cson_cgi_printf(cx, "%s: %s\r\n",
                            cson_string_cstr(key),
                            valcstr ? valcstr : "");
        }
    }
    rc = cson_cgi_response_output_cookies(cx);
    return rc;
}

int cson_cgi_response_output_root(cson_cgi_cx * cx)
{
    return ( !cx || !cx->response.root )
        ? cson_rc.ArgError
        : cson_output_FILE( cx->response.root, cx->opt.outStream, &cx->opt.outOpt );
}

int cson_cgi_response_output_all(cson_cgi_cx * cx)
{
    int rc = 0;
    char isJP = 0;
    char doHeaders = cx->opt.httpHeadersMode;
    if( NULL == cx->response.root )
    {
        return cson_rc.ArgError;
    }
    isJP = cson_cgi_is_jsonp(cx);
    if( doHeaders < 0 )
    {
        if( NULL!=getenv("GATEWAY_INTERFACE") )
        {
            doHeaders = 1;
        }
    }
    if( doHeaders > 0 )
    {
        rc = cson_cgi_response_output_headers(cx);
        if( 0 == rc )
        {
            cson_cgi_puts(cx,"\r")/*yes, putS, not putCHAR!*/;
        }
        else return rc;
    }
    if( isJP )
    {
        cson_cgi_printf(cx,"%s(", "FIXME_JSONP_CALLBACK_NAME" );
    }
    rc = cson_cgi_response_output_root(cx);
    if( 0 == rc )
    {
        if( isJP )
        {
            cson_cgi_putchar(cx,')');
        }
        cson_cgi_putchar(cx,'\n');
        fflush( cx->opt.outStream );
    }
    return rc;
}

/**
   Parses inp as a delimited list, separated by the given
   separator character. Each item in the list is treated
   as a key/value pair in the form KEY=VALUE, and inserted
   into the target cson_object (which must not be NULL).

   This is intended for parsing HTTP GET-style parameter lists.

   If doUrlDecode is true (non-zero) then the VALUE part of the
   key/value pair gets url-decoded before insertion. (FIXME? Also
   decode the keys?)

   If firstOneWins is non-0 then if a given key in the parameters is
   duplicated, entries after the first are ignored. If it is 0 then
   the "last one wins." This is basically a workaround for when we
   have multiple session ID cookies hanging around :/.
   
   On success it returns 0.

   If a given key contains the string "[]", that part is stripped and
   the entry is treated like an array element. e.g. a query string of
   "a[]=3&a[]=7" would result in an array property named "a" with the
   (string) entries ("3", "7").
   
*/
static int cson_cgi_parse_param_list( cson_cgi_cx * cx,
                                      cson_object * tgt,
                                      char const * inp,
                                      char separator,
                                      char doUrlDecode,
                                      char firstOneWins)
{
    if( ! tgt || !separator ) return cson_rc.ArgError;
    else if( !inp || !*inp ) return 0;
    else
    {
        char const * head = inp;
        char const * tail = NULL;
        char * out = NULL;
        unsigned int inLen = strlen( inp );
        unsigned int valLen;
        cson_value * jval = NULL;
        cson_value * listV = NULL;
        cson_array * list = NULL;
        int rc = cson_buffer_reserve( &cx->tmpBuf, inLen+1 );
        if( 0 != rc ) return rc;
        while( cson_cgi_next_token( &head, separator, &tail ) )
        {
            char const * key = head;
            char * value = NULL;
            rc = 0;
            if( head == tail ) break;
            out = (char *)cx->tmpBuf.mem;
            memset( cx->tmpBuf.mem, 0, cx->tmpBuf.capacity );
            for( ; (key<tail) && *key && isspace(*key); ++key )
            {
                /* strip leading spaces in the key name
                   (happens in cookie values). */
            }
            if( key==tail ) break;
            else if( '='==*key )
            {
                /* all-space key. Just skip it. */
                goto next_iter;
            }
            /* Write the key part to the buffer... */
            for( ; (key<tail) && *key && ('='!=*key); ++key ) {
                *(out++) = *key;
            }
            *(out++) = 0;
            if( '=' == *key )
            {
                ++key;
            }
            value = out;
            valLen = 0;
            /* Write the value part to the buffer... */
            for( ; (key<tail) && *key; ++key, ++valLen ) {
                *(out++) = *key;
            }
            key = (char const *)cx->tmpBuf.mem;
            if( firstOneWins && (NULL != cson_object_get( tgt, key )) )
            {
                goto next_iter;
            }
            if( doUrlDecode && valLen )
            {
                cson_cgi_urldecode_inline( value );
            }
            /*MARKER("key=[%s], valLen=%u, value=[%s]\n", key, valLen, value );*/
            jval = cson_value_new_string( value, valLen );
            if( NULL == jval )
            {
                rc = cson_rc.AllocError;
                goto the_end;
            }
            if( NULL != (out = strstr(key,"[]")) )
            { /* Treat key as an array entry, like PHP does... */
                cson_value * freeThisOnErr = NULL;
                *out = 0;
                list = NULL;
                listV = cson_object_get( tgt, key );
                if( listV )
                {
                    if( ! cson_value_is_array( listV ) )
                    {
                        /* skip it to avoid hosing a different entry. */
                        cson_value_free( jval );
                        jval = NULL;
                        goto next_iter;
                    }
                }
                else
                { /* create a new array to hold the value */
                    listV = cson_value_new_array();
                    if( ! listV )
                    {
                        cson_value_free( jval );
                        rc = cson_rc.AllocError;
                        goto the_end;
                    }
                    rc = cson_object_set( tgt, key, listV );
                    if( 0 != rc )
                    {
                        cson_value_free( listV );
                        cson_value_free( jval );
                        goto the_end;
                    }
                    freeThisOnErr = listV;
                }
                list = cson_value_get_array( listV );
                assert( NULL != list );
                rc = cson_array_append( list, jval );
                if( 0 != rc )
                {
                    cson_value_free( jval );
                    cson_value_free( freeThisOnErr );
                    goto the_end;
                }
            }
            else
            {
                rc = cson_object_set( tgt, key, jval );
                if( 0 != rc )
                {
                    cson_value_free( jval );
                    goto the_end;
                }
            }
            next_iter:
            head = tail;
            tail = NULL;
        }
        the_end:
        cson_buffer_reserve( &cx->tmpBuf, 0 );
        return rc;
    }
}
                             

/**
   Parses key/value pairs from a QUERY_STRING-formatted
   string.

   Returns 0 on success. The "most likely" error condition, in terms
   of potential code paths, is is an allocation error.
   
   TODO: if the key part of any entry ends with "[]", treat it as an
   array entry, like PHP does.
*/
static int cson_cgi_parse_query_string( cson_cgi_cx * cx, char const * qstr )
{
    cson_object * env = NULL;
    if( !qstr || !*qstr ) return 0;
    assert(cx);
    env = cson_cgi_env_get_obj( cx, 'g', 1 );
    if( NULL == env ) return cson_rc.AllocError /* guess! */;
    return cson_cgi_parse_param_list( cx, env, qstr, '&', 1, 0 );
}

#if CSON_CGI_ENABLE_POST_FORM_URLENCODED
static int cson_cgi_parse_post_urlencoded( cson_cgi_cx * cx, char const * qstr )
{
    cson_object * env = NULL;
    if( !qstr || !*qstr ) return 0;
    assert(cx);
    env = cson_cgi_env_get_obj( cx, 'p', 1 );
    if( NULL == env ) return cson_rc.AllocError /* guess! */;
    return cson_cgi_parse_param_list( cx, env, qstr, '&', 1, 0 );
}
#endif

/**
   Like cson_cgi_parse_query_string(), but expects qstr to be in COOKIE
   format.
*/
static int cson_cgi_parse_cookies( cson_cgi_cx * cx, char const * qstr )
{
    cson_object * env = NULL;
    if( !qstr || !*qstr ) return 0;
    assert(cx);
    env = cson_cgi_env_get_obj(cx, 'c', 1 );
    if( NULL == env ) return cson_rc.AllocError /* guess! */;
    return cson_cgi_parse_param_list( cx, env, qstr, ';', 1, 1 );
}


/**
   Initializes cx->argv.jval and cx->argv.jarr, adds them to the
   garbage collector, then copies argv to cx->argv.jarr as an
   array of JSON strings.

   Returns 0 on success.

   Results are undefined if argv is not a properly initialized array
   of NUL-terminated strings with at least argc entries.

   If argc is 0 or less then cx->argv is still initialized but has
   a length of 0.

   After the first call, further arguments are appended to the current
   list.
*/
static int cson_cgi_init_argv( cson_cgi_cx * cx, int argc, char const * const * argv )
{
    int rc = 0;
    int i;
    assert( NULL != cx->gc.jobj );
    if( cx->argv.jval == NULL )
    {
        cson_value * v = cson_value_new_array();
        if( NULL == v ) return cson_rc.AllocError;
        rc = cson_cgi_gc_add( cx, cson_cgi_keys.ENV_ARGV, v, 1 );
        if( 0 != rc )
        {
            /* reminder: v was freed by cson_cgi_gc_add() */
            return rc;
        }
        cx->argv.jval = v;
        cx->argv.jarr = cson_value_get_array( v );
        assert( NULL != cx->argv.jarr );
    }
    for( i = 0; i < argc; ++i )
    {
        char const * arg = argv[i];
        cson_value * vstr = cson_value_new_string( arg ? arg : "",
                                                   arg ? strlen(arg) : 0 );
        if( NULL == vstr ) return cson_rc.AllocError;
        rc = cson_array_append( cx->argv.jarr, vstr );
        if( 0 != rc )
        {
            cson_value_free( vstr );
            break;
        }
    }
    return rc;
}

typedef struct CgiPostReadState_ {
    FILE * fh;
    unsigned int len;
    unsigned int pos;
} CgiPostReadState;

static int cson_data_source_FILE_n( void * state, void * dest, unsigned int * n )
{
    if( ! state || !dest || !n ) return cson_rc.ArgError;
    else
    {
        CgiPostReadState * st = (CgiPostReadState *)state;
        if( st->pos >= st->len )
        {
            *n = 0;
            return 0;
        }
        else if( !*n || ((st->pos + *n) > st->len) ) return cson_rc.RangeError;
        else
        {
            unsigned int rsz = (unsigned int)fread( dest, 1, *n, st->fh );
            if( ! rsz )
            {
                *n = rsz;
                return feof(st->fh) ? 0 : cson_rc.IOError;
            }
            else
            {
                *n = rsz;
                st->pos += *n;
                return 0;
            }
        }
    }
}


static int cson_cgi_parse_POST_JSON(cson_cgi_cx * cx, FILE * src, unsigned int contentLen)
{
    cson_value * jv = NULL;
    int rc = 0;
    CgiPostReadState state;
    cson_parse_info pinfo = cson_parse_info_empty;
    assert( 0 != contentLen );
    assert( NULL == cx->request.post.jval );
    state.fh = src;
    state.len = contentLen;
    state.pos = 0;
    rc = cson_parse( &jv, cson_data_source_FILE_n, &state, NULL, &pinfo );
    if( rc )
    {
#if 0
        fprintf(stderr, "%s: Parsing POST as JSON failed: code=%d (%s) line=%u, col=%u\n",
                __FILE__, rc, cson_rc_string(rc), pinfo.line, pinfo.col );
#endif
        return rc;
    }
    rc = cson_cgi_gc_add( cx, cson_cgi_keys.ENV_POST, jv, 1 );
    if( 0 == rc )
    {
        cx->request.post.jval = jv;
        cx->request.post.jobj = cson_value_get_object( jv );
        assert( cx->request.post.jobj && "FIXME: also support an Array as POST data node." ); 
    }
    return rc;
}

static int cson_cgi_init_POST(cson_cgi_cx * cx)
{
    if( ! cx || !cx->opt.inStream ) return cson_rc.ArgError;
    else
    {
        FILE * src = cx->opt.inStream;
        char const * ctype = cson_string_cstr( cson_value_get_string( cson_cgi_getenv( cx, "e", "CONTENT_TYPE" ) ) );
        if( NULL == ctype ) return 0;
        else
        {
            char const * clen = cson_string_cstr( cson_value_get_string( cson_cgi_getenv( cx, "e", "CONTENT_LENGTH" ) ) );
            if( NULL == clen ) return cson_rc.ArgError;
            else
            {
                char * endpt = NULL;
                long len = strtol( clen, &endpt, 10 );
                if( (endpt && *endpt) || (len<=0) ) return cson_rc.RangeError;
#if CSON_CGI_ENABLE_POST_FORM_URLENCODED
                else if( 0 == strncmp(ctype,"application/x-www-form-urlencoded",33) )
                {
                    cson_buffer buf = cson_buffer_empty;
                    int rc = cson_buffer_fill_from( &buf, cson_data_source_FILE, src );
                    if( rc )
                    {
                        goto end_clean;
                        return rc;
                    }
                    if( buf.mem && buf.used )
                    {
#if 1
                        if( strlen((char const *)buf.mem)
                            != buf.used )
                        {
                            /* assume bad/malicious input. */
                            rc = cson_rc.RangeError;
                            goto end_clean;
                        }
#endif
                        rc = cson_cgi_parse_post_urlencoded( cx, (char const *)buf.mem );
                    }
                    end_clean:
                    cson_buffer_reserve( &buf, 0 );
                    return rc;
                }
#endif
                else if( (0 == strncmp(ctype,"application/json",16))
                         || (0 == strncmp(ctype,"text/plain",10))
                         || (0 == strncmp(ctype,"application/javascript",22))
                         )
                {
                    return cson_cgi_parse_POST_JSON(cx, src, len);
                }
                else
                {
                    return cson_rc.TypeError;
                }
            }
        }
    }
}

static int cson_cgi_init_config( cson_cgi_cx * cx, char const * fname )
{
    int rc;
    cson_value * root = NULL;
    rc = cson_parse_filename( &root, fname, NULL, NULL );
    if( 0 == rc )
    {
        assert( NULL != root );
        if( ! cson_value_is_object(root) )
        {
            cson_value_free( root );
            rc = cson_rc.TypeError;
        }
        else
        {
            rc = cson_cgi_gc_add( cx,cson_cgi_keys.ENV_CONFIG, root, 1 );
            if( 0 == rc )
            {
                cx->config.jval = root;
                cx->config.jobj = cson_value_get_object( root );
                assert( NULL != cx->config.jobj );
            }
        }
    }
    return rc;
}

static char * cson_cgi_strdup( char const * src )
{
    size_t const n = src ? strlen(src) : 0;
    char * rc = src ? (char *)malloc(n+1) : NULL;
    if( ! rc ) return NULL;
    memcpy( rc, src, n );
    rc[n] = 0;
    return rc;
}

/**
   Writes a 36-byte (plus one NUL byte) UUID value to dest. dest
   must be at least 37 bytes long. If dest is NULL this function
   has no side effects.

   Not thread-safe.
*/
void cson_cgi_generate_uuid( cson_cgi_cx * cx, char * dest )
{
    static whuuid_rng rng = {
    NULL/*rand*/,
    NULL/*cleanup*/,
    NULL/*impl*/
#if WHUUID_CONFIG_KEEP_METRICS
    ,{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}/*distribution*/
#endif
    };
    whuuid_t u = whuuid_t_empty;
    if( NULL == dest ) return;
    else if( (NULL==rng.rand) && (NULL != RNG_FILENAME) )
    { /* try to open rng file... */
        /* FIXME: we're missing a cleanup handler for the RNG_FILENAME case. */
        FILE * f = fopen(RNG_FILENAME, "rb");
        if( NULL != f )
        {
            rng = whuuid_rng_FILE;
            rng.impl = f;
        }
    }
    if( NULL == rng.rand )
    { /* fall back to LC rng */
        extern char ** environ;
        void * addr;
        unsigned long seed;
        rng = whuuid_rng_lcrng;
        addr = malloc(
                      (((unsigned long)environ) % 13) + 9
                      );
        free(addr) /* but keep the address as a seed value */;
        seed = (unsigned long)addr * (unsigned long)time(NULL);
        rng.impl = (void *)seed;
    }
    whuuid_fill_rand( &u, &rng );
    whuuid_to_string( &u, dest );
}

char const * cson_cgi_session_id(cson_cgi_cx * cx)
{
    return cx ? cx->session.id : NULL;
}


static int cson_cgi_init_session_mgr(cson_cgi_cx * cx)
{
    /*
       Check for this config structure:

       {
       manager:"mgrID",
       managers:{
           mgrID:{
               sessionDriver: "back-end-name" (e.g. "cpdo" or "file"),
               ... back-end-specific options ...
           },
           otherManager: { ... }
       }
    */
    cson_object const * conf = cson_cgi_env_get_obj(cx,  'f', 0 );
    cson_string const * aString;
    cson_value const * optV = NULL;
    cson_object const * optObj = NULL;
    if( NULL == conf ) return 0;
    assert( cx && !cx->session.mgr );

    /* get "manager" part... */
    aString = cson_value_get_string( cson_object_get_sub( conf, "session.manager", '.' ) );
    if( NULL == aString ) return 0;

    /* Fetch that manager config ... */
    optV = cson_object_get_sub( conf, "session.managers", '.' );
    if( optV )
    {
        optV = cson_object_get( cson_value_get_object( optV ), cson_string_cstr( aString ) );
    }
    optObj = cson_value_get_object( optV );
    if( ! optObj ) return 0;

    /* Get the "sessionDriver" part ... */
    aString = cson_value_get_string( cson_object_get( optObj, "sessionDriver" ) );
    if( NULL == aString ) return 0;

    return cson_sessmgr_load( cson_string_cstr(aString), &cx->session.mgr, optObj );
}


static char const * cson_cgi_get_session_key(cson_cgi_cx * cx)
{
    cson_object const * conf = cson_cgi_env_get_obj( cx, 'f', 0 );
    char const * sessKey = CSON_CGI_KEY_SESSION;
    assert( NULL != cx );
    if( conf )
    {
        cson_string const * k = cson_value_get_string( cson_object_get_sub( conf, "session.cookieName", '.' ) );
        char const * ck = k ? cson_string_cstr(k) : NULL;
        if( ck ) sessKey = ck;
    }
    return sessKey;
}

static int cson_cgi_gen_session_id(cson_cgi_cx * cx)
{
    char buf[37] = {0};
    if( cx->session.id )
    {
        free( cx->session.id );
        cx->session.id = NULL;
    }
    cson_cgi_generate_uuid( cx, buf );
    cx->session.id = cson_cgi_strdup( buf );
    return ( NULL == cx->session.id )
        ? cson_rc.AllocError
        : 0;
}

static int cson_cgi_init_session( cson_cgi_cx * cx, char const * forceID )
{
    char const * idstr;
    char const * sessKey;
    int rc = cson_cgi_init_session_mgr(cx);
    if( 0 != rc ) return rc;
    else if( NULL == cx->session.mgr ) return 0
        /* treat as non-fatal error */;
    sessKey = cson_cgi_get_session_key(cx);
    assert( sessKey && *sessKey );
    /* Try to get the session ID ... */
    idstr = (forceID && *forceID)
        ? forceID
        : cson_string_cstr( cson_value_get_string( cson_cgi_getenv( cx, "cegp", sessKey ) ) );
    if( NULL == idstr )
    { /* Generate a session ID but defer creation of the session
         object until the client does it. If they never use it,
         we won't bother saving the session.
      */
        rc = cson_cgi_gen_session_id(cx);
        if( 0 != rc ) return rc;
    }
    else
    { /* try to load the session */
        cson_value * sessV = NULL;
        free( cx->session.id );
        cx->session.id = cson_cgi_strdup( idstr );
        if( ! cx->session.id ) return cson_rc.AllocError;
        rc = cx->session.mgr->api->load( cx->session.mgr, &sessV,
                                         cx->session.id );
        if( (0 == rc) && sessV )
        {
            rc = cson_cgi_gc_add( cx, cson_cgi_keys.ENV_SESSION, sessV, 1 );
            if( 0 != rc )
            { /* almost certainly an alloc error */
                return rc;
            }
            cx->session.env.jval = sessV;
            cx->session.env.jobj = cson_value_get_object( sessV );
        }
        else
        {
            if( !forceID || !*forceID )
            {
                /* On load error, assume the session ID is
                   stale. Re-generate it to avoid potential future
                   collisions. This heuristic will cause us intermittent
                   grief when loading does not work for a second or three
                   due to network-related problems. Each time that
                   happens, the caller will lose his session.
                */
                rc = cson_cgi_gen_session_id(cx);
                if( 0 != rc ) return rc;
            }
        }
    }
    assert( NULL != cx->session.id );
    { /* make sure the session ID is set in the cookies and has an updated
         expiry time... */
        unsigned int expiry = 0;
        cson_object const * conf;
        cson_value * jstr = cson_value_new_string( cx->session.id,
                                                   strlen(cx->session.id) );
        if( ! jstr ) return cson_rc.AllocError;
        conf = cson_cgi_env_get_obj( cx, 'f', 0 );
        if( conf )
        {
            expiry = cson_value_get_integer( cson_object_get_sub( conf, "session.cookieLifetimeMinutes", '.' ) );
            if( expiry ) expiry *= 60 /* convert to seconds */;
        }
        if( ! expiry )
        {
            expiry = (60*60*24);
        }
        expiry += (unsigned int)time(NULL);
        
        rc = cson_cgi_cookie_set2( cx, sessKey, jstr,
                                   NULL, NULL,
                                   expiry,
                                   0/*FIXME: set 'secure' option in HTTPS mode.*/,
                                   0/*FIXME: make the httponly flag configurable*/ );
        if( 0 != rc )
        {
            cson_value_free( jstr );
            if( cson_rc.AllocError == rc ) return rc;
            rc = 0 /* else treat as non-fatal */;
        }
    }
    return 0;
}



int cson_cgi_init(cson_cgi_cx * cx, int argc, char const * const * argv, cson_cgi_init_opt * opt )
{
    int rc = 0;
    static int hasInited = 0;
    if( NULL == cx ) return cson_rc.ArgError;
    else if( NULL != cx->gc.jval )
    { /* we've already done this or object was mal-initialized... */
        return cson_rc.ArgError;
    }

    assert( NULL != CSON_CGI_GETENV_DEFAULT );

#if CSON_CGI_USE_SIGNALS
    {
        /* FIXME: use sigaction() instead of signal() */
        typedef void (*sighnd)(int);
        sighnd oldSigPipe;
        oldSigPipe = signal(SIGPIPE, SIG_IGN) /* to try avoid unclean termination if client disconnects. */;
        if( SIG_ERR == oldSigPipe )
        {
            return cson_rc.UnknownError;
        }
    }
#endif

    if( ! hasInited )
    {
        hasInited = 1;
        setlocale( LC_ALL, "C" )
            /* supposedly important for underlying JSON parser.
               FIXME: only do this init once!
            */;
    }

    cx->gc.jval = cson_value_new_object();
    if( NULL == cx->gc.jval )
    {
        return cson_rc.AllocError;
    }
    cx->gc.jobj = cson_value_get_object( cx->gc.jval );
    assert( NULL != cx->gc.jobj );

    if( opt )
    {
        cx->opt = *opt;
    }
    if( NULL == cx->opt.inStream ) cx->opt.inStream = stdin;
    if( NULL == cx->opt.outStream ) cx->opt.outStream = stdout;
    if( NULL == cx->opt.errStream ) cx->opt.errStream = stderr;

#define CHECKRC if(rc) goto end
    rc = cson_cgi_import_environ(cx);
    CHECKRC;
    rc = cson_cgi_init_argv( cx, argc, argv );
    CHECKRC;
    { /* read config file */
        char const * conffile = cx->opt.configFile;
        if( ! conffile )
        {
            cson_value const * v = cson_cgi_getenv( cx, "e", "CSON_CGI_CONFIG" );
            if( v && cson_value_is_string(v) )
            {
                conffile = cson_string_cstr( cson_value_get_string( v ) );
            }
        }
        if( conffile )
        {
            cson_cgi_init_config( cx, conffile )
                /* Ignore error code.

                TODO:

                - use argv[0]+".json" as the default config file.
                */
                ;
        }
    }

    rc = cson_cgi_parse_query_string( cx, getenv("QUERY_STRING") );
    CHECKRC;
    rc = cson_cgi_parse_cookies( cx, getenv("HTTP_COOKIE") );
    CHECKRC;
    rc = cson_cgi_init_POST(cx);
    if( cson_rc.AllocError == rc ) goto end;
    else rc = 0
        /* this can fail for several reasons which are non-fatal. */
        ;

    if( (NULL == opt) )
    {
        /* TODO: read these values from cx->config, if available. */
        cx->opt.outOpt.indentation = 1;
        cx->opt.outOpt.addNewline = 1;
        cx->opt.outOpt.addSpaceAfterColon = 1;
        cx->opt.outOpt.indentSingleMemberValues = 1;
    }

    rc = cson_cgi_init_session( cx, opt ? opt->sessionID : NULL )
        /* ignore non-OOM error codes. Not fatal. */;
    if( cson_rc.AllocError == rc ) goto end;
    else rc = 0;

    /*
      TODOs:

      - Read form-urlencoded POST data. (Do this BEFORE
      restoring the session, so that we can get the session
      ID from there if needed.)
    */
    end:
    return rc;
#undef CHECKRC
}

#undef cson_cgi_env_map_empty_m
#undef CSON_CGI_USE_SIGNALS
#undef RNG_FILENAME
/* end file cgi/cson_cgi.c */

Added src/cson_amalgamation.h.















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/* auto-generated! Do not edit! */
/* begin file include/wh/cson/cson.h */
#if !defined(WANDERINGHORSE_NET_CSON_H_INCLUDED)
#define WANDERINGHORSE_NET_CSON_H_INCLUDED 1

/*#include <stdint.h> C99: fixed-size int types. */
#include <stdio.h> /* FILE decl */

/** @page page_cson cson JSON API

cson (pronounced "season") is an object-oriented C API for generating
and consuming JSON (http://www.json.org) data.

Its main claim to fame is that it can parse JSON from, and output it
to, damned near anywhere. The i/o routines use a callback function to
fetch/emit JSON data, allowing clients to easily plug in their own
implementations. Implementations are provided for string- and
FILE-based i/o.

Project home page: http://fossil.wanderinghorse.net/repos/cson

Author: Stephan Beal (http://www.wanderinghorse.net/home/stephan/)

License: Dual Public Domain/MIT

The full license text is at the bottom of the main header file
(cson.h).

Examples of how to use the library are scattered throughout
the API documentation, in the test.c file in the source repo,
and in the wiki on the project's home page.


*/

#if defined(__cplusplus)
extern "C" {
#endif

#if defined(_WIN32)
#  define CSON_ENABLE_UNIX 0
#else
#  define CSON_ENABLE_UNIX 1
#endif


/** @typedef some_long_int_type cson_int_t

Typedef for JSON-like integer types. This is (long long) where feasible,
otherwise (long).
*/
#if (__STDC_VERSION__ >= 199901L) || (HAVE_LONG_LONG == 1)
typedef long long cson_int_t;
#define CSON_INT_T_SFMT "lld"
#define CSON_INT_T_PFMT "lld"
#else 
typedef long cson_int_t;
#define CSON_INT_T_SFMT "ld"
#define CSON_INT_T_PFMT "ld"
#endif

/** @def CSON_VOID_PTR_IS_BIG

ONLY define this to a true value if you know that

(sizeof(cson_int_t) <= sizeof(void*))

If that is the case, cson does not need to dynamically
allocate integers. However, enabling this may cause
compilation warnings in 32-bit builds even though the code
being warned about cannot ever be called. To get around such
warnings, when building on a 64-bit environment you can define
this to 1 to get "big" integer support. HOWEVER, all clients must
also use the same value for this macro. If i knew a halfway reliable
way to determine this automatically at preprocessor-time, i would
automate this. We might be able to do halfway reliably by looking
for a large INT_MAX value?
*/
#if !defined(CSON_VOID_PTR_IS_BIG)

/* Largely taken from http://predef.sourceforge.net/prearch.html

See also: http://poshlib.hookatooka.com/poshlib/trac.cgi/browser/posh.h
*/
#  if defined(_WIN64) || defined(__LP64__/*gcc*/) \
    || defined(_M_X64) || defined(__amd64__) || defined(__amd64) \
    ||  defined(__x86_64__) || defined(__x86_64) \
    || defined(__ia64__) || defined(__ia64) || defined(_IA64) || defined(__IA64__) \
    || defined(_M_IA64) \
    || defined(__sparc_v9__) || defined(__sparcv9) || defined(_ADDR64) \
    || defined(__64BIT__)
#    define CSON_VOID_PTR_IS_BIG 1
#  else
#    define CSON_VOID_PTR_IS_BIG 0
#  endif
#endif

/** @typedef double_or_long_double cson_double_t

This is the type of double value used by the library.
It is only lightly tested with long double, and when using
long double the memory requirements for such values goes
up.
*/
#if 0
typedef long double cson_double_t;
#define CSON_DOUBLE_T_SFMT "Lf"
#define CSON_DOUBLE_T_PFMT "Lf"
#else
typedef double cson_double_t;
#define CSON_DOUBLE_T_SFMT "f"
#define CSON_DOUBLE_T_PFMT "f"
#endif

/** @def CSON_INT_T_SFMT

scanf()-compatible format token for cson_int_t.
*/

/** @def CSON_INT_T_PFMT

printf()-compatible format token for cson_int_t.
*/


/** @def CSON_DOUBLE_T_SFMT

scanf()-compatible format token for cson_double_t.
*/

/** @def CSON_DOUBLE_T_PFMT

printf()-compatible format token for cson_double_t.
*/

typedef struct cson_value cson_value;

/** @struct cson_value
   
   The core value type of this API. It is opaque to clients, and
   only the cson public API should be used for setting or
   inspecting their values.

   This class is opaque because stack-based usage can easily cause
   leaks if one does not intimately understand the underlying
   internal memory management (which sometimes changes).

   It is (as of 20110323) legal to insert a given value instance into
   multiple containers (they will share ownership using reference
   counting) as long as those insertions do not cause cycles. However,
   be very aware that such value re-use uses a reference to the
   original copy, meaning that if its value is changed once, it is
   changed everywhere. Also beware that multi-threaded write
   operations on such references leads to undefined behaviour.
   
   PLEASE read the ACHTUNGEN below...

   ACHTUNG #1:

   cson_values MUST NOT form cycles (e.g. via object or array
   entries).

   Not abiding th Holy Law Of No Cycles will lead to double-frees and
   the like (i.e. undefined behaviour, likely crashes due to infinite
   recursion or stepping on invalid (freed) pointers).

   ACHTUNG #2:
   
   ALL cson_values returned as non-const cson_value pointers from any
   public functions in the cson API are to be treated as if they are
   heap-allocated, and MUST be freed by client by doing ONE of:
   
   - Passing it to cson_value_free().
   
   - Adding it to an Object or Array, in which case the object/array
   takes over ownership. As of 20110323, a value may be inserted into
   a single container multiple times, or into multiple containers,
   in which case they all share ownership (via reference counting)
   of the original value (meaning any changes to it are visible in
   all references to it).
   
   Each call to cson_value_new_xxx() MUST eventually be followed up
   by one of those options.
   
   Some cson_value_new_XXX() implementations do not actually allocate
   memory, but this is an internal implementation detail. Client code
   MUST NOT rely on this behaviour and MUST treat each object
   returned by such a function as if it was a freshly-allocated copy
   (even if their pointer addresses are the same).
   
   ACHTUNG #3:

   Note that ACHTUNG #2 tells us that we must always free (or transfer
   ownership of) all pointers returned bycson_value_new_xxx(), but
   that two calls to (e.g.) cson_value_new_bool(1) will (or might)
   return the same address. The client must not rely on the
   "non-allocation" policy of such special cases, and must pass each
   returned value to cson_value_free(), even if two of them have the
   same address.  Some special values (e.g. null, true, false, integer
   0, double 0.0, and empty strings) use shared copies and in other
   places reference counting is used internally to figure out when it
   is safe to destroy an object.


   @see cson_value_new_array()
   @see cson_value_new_object()
   @see cson_value_new_string()
   @see cson_value_new_integer()
   @see cson_value_new_double()
   @see cson_value_new_bool()
   @see cson_value_true()
   @see cson_value_false()
   @see cson_value_null()
   @see cson_value_free()
*/

/** @var cson_rc

   This object defines the error codes used by cson.

   Library routines which return int values almost always return a
   value from this structure. None of the members in this struct have
   published values except for the OK member, which has the value 0.
   All other values might be incidentally defined where clients
   can see them, but the numbers might change from release to
   release, so clients should only use the symbolic names.

   Client code is expected to access these values via the shared
   cson_rc object, and use them as demonstrated here:

   @code
   int rc = cson_some_func(...);
   if( 0 == rc ) {...success...}
   else if( cson_rc.ArgError == rc ) { ... some argument was wrong ... }
   else if( cson_rc.AllocError == rc ) { ... allocation error ... }
   ...
   @endcode
   
   The entries named Parse_XXX are generally only returned by
   cson_parse() and friends.
*/

/** @struct cson_rc_
   See \ref cson_rc for details.
*/
static const struct cson_rc_
{
    /** The generic success value. Guaranteed to be 0. */
    const int OK;
    /** Signifies an error in one or more arguments (e.g. NULL where it is not allowed). */
    const int ArgError;
    /** Signifies that some argument is not in a valid range. */
    const int RangeError;
    /** Signifies that some argument is not of the correct logical cson type. */
    const int TypeError;
    /** Signifies an input/ouput error. */
    const int IOError;
    /** Signifies an out-of-memory error. */
    const int AllocError;
    /** Signifies that the called code is "NYI" (Not Yet Implemented). */
    const int NYIError;
    /** Signifies that an internal error was triggered. If it happens, please report this as a bug! */
    const int InternalError;
    /** Signifies that the called operation is not supported in the
        current environment. e.g.  missing support from 3rd-party or
        platform-specific code.
    */
    const int UnsupportedError;
    /**
       Signifies that the request resource could not be found.
     */
    const int NotFoundError;
    /**
       Signifies an unknown error, possibly because an underlying
       3rd-party API produced an error and we have no other reasonable
       error code to convert it to.
     */
    const int UnknownError;
    /**
       Signifies that the parser found an unexpected character.
     */
    const int Parse_INVALID_CHAR;
    /**
       Signifies that the parser found an invalid keyword (possibly
       an unquoted string).
     */
    const int Parse_INVALID_KEYWORD;
    /**
       Signifies that the parser found an invalid escape sequence.
     */
    const int Parse_INVALID_ESCAPE_SEQUENCE;
    /**
       Signifies that the parser found an invalid Unicode character
       sequence.
     */
    const int Parse_INVALID_UNICODE_SEQUENCE;
    /**
       Signifies that the parser found an invalid numeric token.
     */
    const int Parse_INVALID_NUMBER;
    /**
       Signifies that the parser reached its maximum defined
       parsing depth before finishing the input.
     */
    const int Parse_NESTING_DEPTH_REACHED;
    /**
       Signifies that the parser found an unclosed object or array.
     */
    const int Parse_UNBALANCED_COLLECTION;
    /**
       Signifies that the parser found an key in an unexpected place.
     */
    const int Parse_EXPECTED_KEY;
    /**
       Signifies that the parser expected to find a colon but
       found none (e.g. between keys and values in an object).
     */
    const int Parse_EXPECTED_COLON;
} cson_rc = {
0/*OK*/,
1/*ArgError*/,
2/*RangeError*/,
3/*TypeError*/,
4/*IOError*/,
5/*AllocError*/,
6/*NYIError*/,
7/*InternalError*/,
8/*UnsupportedError*/,
9/*NotFoundError*/,
10/*UnknownError*/,
11/*Parse_INVALID_CHAR*/,
12/*Parse_INVALID_KEYWORD*/,
13/*Parse_INVALID_ESCAPE_SEQUENCE*/,
14/*Parse_INVALID_UNICODE_SEQUENCE*/,
15/*Parse_INVALID_NUMBER*/,
16/*Parse_NESTING_DEPTH_REACHED*/,
17/*Parse_UNBALANCED_COLLECTION*/,
18/*Parse_EXPECTED_KEY*/,
19/*Parse_EXPECTED_COLON*/
};

/**
   Returns the string form of the cson_rc code corresponding to rc, or
   some unspecified, non-NULL string if it is an unknown code.

   The returned bytes are static and do not changing during the
   lifetime of the application.
*/
char const * cson_rc_string(int rc);

/** @struct cson_parse_opt
   Client-configurable options for the cson_parse() family of
   functions.
*/
struct cson_parse_opt
{
    /**
       Maximum object/array depth to traverse.
    */
    unsigned short maxDepth;
    /**
       Whether or not to allow C-style comments.  Do not rely on this
       option being available. If the underlying parser is replaced,
       this option might no longer be supported.
    */
    char allowComments;
};
typedef struct cson_parse_opt cson_parse_opt;

/**
   Empty-initialized cson_parse_opt object.
*/
#define cson_parse_opt_empty_m { 25/*maxDepth*/, 0/*allowComments*/}


/**
   A class for holding JSON parser information. It is primarily
   intended for finding the position of a parse error.
*/
struct cson_parse_info
{
    /**
       1-based line number.
    */
    unsigned int line;
    /**
       0-based column number.
     */
    unsigned int col;

    /**
       Length, in bytes.
    */
    unsigned int length;
    
    /**
       Error code of the parse run (0 for no error).
    */
    int errorCode;

    /**
       The total number of object keys successfully processed by the
       parser.
    */
    unsigned int totalKeyCount;

    /**
       The total number of object/array values successfully processed
       by the parser, including the root node.
     */
    unsigned int totalValueCount;
};
typedef struct cson_parse_info cson_parse_info;

/**
   Empty-initialized cson_parse_info object.
*/
#define cson_parse_info_empty_m {1/*line*/,\
            0/*col*/,                                   \
            0/*length*/,                                \
            0/*errorCode*/,                             \
            0/*totalKeyCount*/,                         \
            0/*totalValueCount*/                        \
            }
/**
   Empty-initialized cson_parse_info object.
*/
extern const cson_parse_info cson_parse_info_empty;

/**
   Empty-initialized cson_parse_opt object.
*/
extern const cson_parse_opt cson_parse_opt_empty;

/**
    Client-configurable options for the cson_output() family of
    functions.
*/
struct cson_output_opt
{
    /**
       Specifies how to indent (or not) output. The values
       are:

       (0) == no extra indentation.
       
       (1) == 1 TAB character for each level.

       (>1) == that number of SPACES for each level.
    */
    unsigned char indentation;

    /**
       Maximum object/array depth to traverse. Traversing deeply can
       be indicative of cycles in the object/array tree, and this
       value is used to figure out when to abort the traversal.
    */
    unsigned short maxDepth;
    
    /**
       If true, a newline will be added to generated output,
       else not.
    */
    char addNewline;

    /**
       If true, a space will be added after the colon operator
       in objects' key/value pairs.
    */
    char addSpaceAfterColon;

    /**
       If set to 1 then objects/arrays containing only a single value
       will not indent an extra level for that value (but will indent
       on subsequent levels if that value contains multiple values).
    */
    char indentSingleMemberValues;

    /**
       The JSON format allows, but does not require, JSON generators
       to backslash-escape forward slashes. This option enables/disables
       that feature. According to JSON's inventor, Douglas Crockford:

       <quote>
       It is allowed, not required. It is allowed so that JSON can be
       safely embedded in HTML, which can freak out when seeing
       strings containing "</". JSON tolerates "<\/" for this reason.
       </quote>

       (from an email on 2011-04-08)

       The default value is 0 (because it's just damned ugly).
    */
    char escapeForwardSlashes;
};
typedef struct cson_output_opt cson_output_opt;

/**
   Empty-initialized cson_output_opt object.
*/
#define cson_output_opt_empty_m { 0/*indentation*/,\
            25/*maxDepth*/,                             \
            0/*addNewline*/,                            \
            0/*addSpaceAfterColon*/,                    \
            0/*indentSingleMemberValues*/,              \
            0/*escapeForwardSlashes*/                   \
            }

/**
   Empty-initialized cson_output_opt object.
*/
extern const cson_output_opt cson_output_opt_empty;

/**
   Typedef for functions which act as an input source for
   the cson JSON parser.

   The arguments are:

   - state: implementation-specific state needed by the function.

   - n: when called, *n will be the number of bytes the function
   should read and copy to dest. The function MUST NOT copy more than
   *n bytes to dest. Before returning, *n must be set to the number of
   bytes actually copied to dest. If that number is smaller than the
   original *n value, the input is assumed to be completed (thus this
   is not useful with non-blocking readers).

   - dest: the destination memory to copy the data do.

   Must return 0 on success, non-0 on error (preferably a value from
   cson_rc).

   The parser allows this routine to return a partial character from a
   UTF multi-byte character. The input routine does not need to
   concern itself with character boundaries.
*/
typedef int (*cson_data_source_f)( void * state, void * dest, unsigned int * n );

/**
   Typedef for functions which act as an output destination for
   generated JSON.

   The arguments are:

   - state: implementation-specific state needed by the function.

   - n: the length, in bytes, of src.

   - src: the source bytes which the output function should consume.
   The src pointer will be invalidated shortly after this function
   returns, so the implementation must copy or ignore the data, but not
   hold a copy of the src pointer.

   Must return 0 on success, non-0 on error (preferably a value from
   cson_rc).

   These functions are called relatively often during the JSON-output
   process, and should try to be fast.   
*/
typedef int (*cson_data_dest_f)( void * state, void const * src, unsigned int n );

/**
    Reads JSON-formatted string data (in ASCII, UTF8, or UTF16), using the
    src function to fetch all input. This function fetches each input character
    from the source function, which is calls like src(srcState, buffer, bufferSize),
    and processes them. If anything is not JSON-kosher then this function
    fails and returns one of the non-0 cson_rc codes.

    This function is only intended to read root nodes of a JSON tree, either
    a single object or a single array, containing any number of child elements.

    On success, *tgt is assigned the value of the root node of the
    JSON input, and the caller takes over ownership of that memory.
    On error, *tgt is not modified and the caller need not do any
    special cleanup, except possibly for the input source.


    The opt argument may point to an initialized cson_parse_opt object
    which contains any settings the caller wants. If it is NULL then
    default settings (the values defined in cson_parse_opt_empty) are
    used.

    The info argument may be NULL. If it is not NULL then the parser
    populates it with information which is useful in error
    reporting. Namely, it contains the line/column of parse errors.
    
    The srcState argument is ignored by this function but is passed on to src,
    so any output-destination-specific state can be stored there and accessed
    via the src callback.
    
    Non-parse error conditions include:

    - (!tgt) or !src: cson_rc.ArgError
    - cson_rc.AllocError can happen at any time during the input phase

    Here's a complete example of using a custom input source:

    @code
    // Internal type to hold state for a JSON input string.
    typedef struct
    {
        char const * str; // start of input string
        char const * pos; // current internal cursor position
        char const * end; // logical EOF (one-past-the-end)
    } StringSource;

    // cson_data_source_f() impl which uses StringSource.
    static int cson_data_source_StringSource( void * state, void * dest,
                                              unsigned int * n )
    {
        StringSource * ss = (StringSource*) state;
        unsigned int i;
        unsigned char * tgt = (unsigned char *)dest;
        if( ! ss || ! n || !dest ) return cson_rc.ArgError;
        else if( !*n ) return cson_rc.RangeError;
        for( i = 0;
             (i < *n) && (ss->pos < ss->end);
             ++i, ++ss->pos, ++tgt )
        {
             *tgt = *ss->pos;
        }
        *n = i;
        return 0;
    }

    ...
    // Now use StringSource together with cson_parse()
    StringSource ss;
    cson_value * root = NULL;
    char const * json = "{\"k1\":123}";
    ss.str = ss.pos = json;
    ss.end = json + strlen(json);
    int rc = cson_parse( &root, cson_data_source_StringSource, &ss, NULL, NULL );
    @endcode

    It is recommended that clients wrap such utility code into
    type-safe wrapper functions which also initialize the internal
    state object and check the user-provided parameters for legality
    before passing them on to cson_parse(). For examples of this, see
    cson_parse_FILE() or cson_parse_string().

    TODOs:

    - Buffer the input in larger chunks. We currently read
    byte-by-byte, but i'm too tired to write/test the looping code for
    the buffering.
    
    @see cson_parse_FILE()
    @see cson_parse_string()
*/
int cson_parse( cson_value ** tgt, cson_data_source_f src, void * srcState,
                cson_parse_opt const * opt, cson_parse_info * info );
/**
   A cson_data_source_f() implementation which requires the state argument
   to be a readable (FILE*) handle.
*/
int cson_data_source_FILE( void * state, void * dest, unsigned int * n );

/**
   Equivalent to cson_parse( tgt, cson_data_source_FILE, src, opt ).

   @see cson_parse_filename()
*/
int cson_parse_FILE( cson_value ** tgt, FILE * src,
                     cson_parse_opt const * opt, cson_parse_info * info );

/**
   Convenience wrapper around cson_parse_FILE() which opens the given filename.

   Returns cson_rc.IOError if the file cannot be opened.

   @see cson_parse_FILE()
*/
int cson_parse_filename( cson_value ** tgt, char const * src,
                         cson_parse_opt const * opt, cson_parse_info * info );

/**
   Uses an internal helper class to pass src through cson_parse().
   See that function for the return value and argument semantics.

   src must be a string containing JSON code, at least len bytes long,
   and the parser will attempt to parse exactly len bytes from src.

   If len is less than 2 (the minimum length of a legal top-node JSON
   object) then cson_rc.RangeError is returned.
*/
int cson_parse_string( cson_value ** tgt, char const * src, unsigned int len,
                       cson_parse_opt const * opt, cson_parse_info * info );



/**
   Outputs the given value as a JSON-formatted string, sending all
   output to the given callback function. It is intended for top-level
   objects or arrays, but can be used with any cson_value.

   If opt is NULL then default options (the values defined in
   cson_output_opt_empty) are used.

   If opt->maxDepth is exceeded while traversing the value tree,
   cson_rc.RangeError is returned.

   The destState parameter is ignored by this function and is passed
   on to the dest function.

   Returns 0 on success. On error, any amount of output might have been
   generated before the error was triggered.
   
   Example:

   @code
   int rc = cson_output( myValue, cson_data_dest_FILE, stdout, NULL );
   // basically equivalent to: cson_output_FILE( myValue, stdout, NULL );
   // but note that cson_output_FILE() actually uses different defaults
   // for the output options.
   @endcode
*/
int cson_output( cson_value const * src, cson_data_dest_f dest, void * destState, cson_output_opt const * opt );


/**
   A cson_data_dest_f() implementation which requires the state argument
   to be a writable (FILE*) handle.
*/
int cson_data_dest_FILE( void * state, void const * src, unsigned int n );

/**
   Almost equivalent to cson_output( src, cson_data_dest_FILE, dest, opt ),
   with one minor difference: if opt is NULL then the default options
   always include the addNewline option, since that is normally desired
   for FILE output.

   @see cson_output_filename()
*/
int cson_output_FILE( cson_value const * src, FILE * dest, cson_output_opt const * opt );
/**
   Convenience wrapper around cson_output_FILE() which writes to the given filename, destroying
   any existing contents. Returns cson_rc.IOError if the file cannot be opened.

   @see cson_output_FILE()
*/
int cson_output_filename( cson_value const * src, char const * dest, cson_output_opt const * fmt );

/** Returns true if v is null, v->api is NULL, or v holds the special undefined value. */
char cson_value_is_undef( cson_value const * v );
/** Returns true if v contains a null value. */
char cson_value_is_null( cson_value const * v );
/** Returns true if v contains a bool value. */
char cson_value_is_bool( cson_value const * v );
/** Returns true if v contains an integer value. */
char cson_value_is_integer( cson_value const * v );
/** Returns true if v contains a double value. */
char cson_value_is_double( cson_value const * v );
/** Returns true if v contains a number (double, integer) value. */
char cson_value_is_number( cson_value const * v );
/** Returns true if v contains a string value. */
char cson_value_is_string( cson_value const * v );
/** Returns true if v contains an array value. */
char cson_value_is_array( cson_value const * v );
/** Returns true if v contains an object value. */
char cson_value_is_object( cson_value const * v );

/** @struct cson_object

    cson_object is an opaque handle to an Object value.

    They are used like:

    @code
    cson_object * obj = cson_value_get_object(myValue);
    ...
    @endcode

    They can be created like:

    @code
    cson_value * objV = cson_value_new_object();
    cson_object * obj = cson_value_get_object(objV);
    // obj is owned by objV and objV must eventually be freed
    // using cson_value_free() or added to a container
    // object/array (which transfers ownership to that container).
    @endcode

    @see cson_value_new_object()
    @see cson_value_get_object()
    @see cson_value_free()
*/

typedef struct cson_object cson_object;

/** @struct cson_array

    cson_array is an opaque handle to an Array value.

    They are used like:

    @code
    cson_array * obj = cson_value_get_array(myValue);
    ...
    @endcode

    They can be created like:

    @code
    cson_value * arV = cson_value_new_array();
    cson_array * ar = cson_value_get_array(arV);
    // ar is owned by arV and arV must eventually be freed
    // using cson_value_free() or added to a container
    // object/array (which transfers ownership to that container).
    @endcode

    @see cson_value_new_array()
    @see cson_value_get_array()
    @see cson_value_free()

*/
typedef struct cson_array cson_array;

/** @struct cson_string

   cson-internal string type, opaque to client code. Strings in cson
   are immutable and allocated only by library internals, never
   directly by client code.

   The actual string bytes are to be allocated together in the same
   memory chunk as the cson_string object, which saves us 1 malloc()
   and 1 pointer member in this type (because we no longer have a
   direct pointer to the memory).

   Potential TODOs:

   @see cson_string_cstr()
*/
typedef struct cson_string cson_string;

/**
   Converts the given value to a boolean, using JavaScript semantics depending
   on the concrete type of val:

   undef or null: false
   
   boolean: same
   
   integer, double: 0 or 0.0 == false, else true
   
   object, array: true

   Returns 0 on success and assigns *v (if v is not NULL) to either 0 or 1.
   On error (val is NULL) then v is not modified.
*/
int cson_value_fetch_bool( cson_value const * val, char * v );
/**
   Similar to cson_value_fetch_bool(), but fetches an integer value.

   The conversion, if any, depends on the concrete type of val:

   NULL, null, undefined: *v is set to 0 and 0 is returned.
   
   string, object, array: *v is set to 0 and
   cson_rc.TypeError is returned. The error may normally be safely
   ignored, but it is provided for those wanted to know whether a direct
   conversion was possible.

   integer: *v is set to the int value and 0 is returned.
   
   double: *v is set to the value truncated to int and 0 is returned.
*/
int cson_value_fetch_integer( cson_value const * val, cson_int_t * v );
/**
   The same conversions and return values as
   cson_value_fetch_integer(), except that the roles of int/double are
   swapped.
*/
int cson_value_fetch_double( cson_value const * val, cson_double_t * v );

/**
   If cson_value_is_string(val) then this function assigns *str to the
   contents of the string. str may be NULL, in which case this function
   functions like cson_value_is_string() but returns 0 on success.

   Returns 0 if val is-a string, else non-0, in which case *str is not
   modified.

   The bytes are owned by the given value and may be invalidated in any of
   the following ways:

   - The value is cleaned up or freed.

   - An array or object containing the value peforms a re-allocation
   (it shrinks or grows).

   And thus the bytes should be consumed before any further operations
   on val or any container which holds it.

   Note that this routine does not convert non-String values to their
   string representations. (Adding that ability would add more
   overhead to every cson_value instance.)
*/
int cson_value_fetch_string( cson_value const * val, cson_string const ** str );

/**
   If cson_value_is_object(val) then this function assigns *obj to the underlying
   object value and returns 0, otherwise non-0 is returned and *obj is not modified.

   obj may be NULL, in which case this function works like cson_value_is_object()
   but with inverse return value semantics (0==success) (and it's a few
   CPU cycles slower).

   The *obj pointer is owned by val, and will be invalidated when val
   is cleaned up.

   Achtung: for best results, ALWAYS pass a pointer to NULL as the
   second argument, e.g.:

   @code
   cson_object * obj = NULL;
   int rc = cson_value_fetch_object( val, &obj );

   // Or, more simply:
   obj = cson_value_get_object( val );
   @endcode

   @see cson_value_get_object()
*/
int cson_value_fetch_object( cson_value const * val, cson_object ** obj );

/**
   Identical to cson_value_fetch_object(), but works on array values.

   @see cson_value_get_array()
*/
int cson_value_fetch_array( cson_value const * val, cson_array ** tgt );

/**
   Simplified form of cson_value_fetch_bool(). Returns 0 if val
   is NULL.
*/
char cson_value_get_bool( cson_value const * val );

/**
   Simplified form of cson_value_fetch_integer(). Returns 0 if val
   is NULL.
*/
cson_int_t cson_value_get_integer( cson_value const * val );

/**
   Simplified form of cson_value_fetch_double(). Returns 0.0 if val
   is NULL.
*/
cson_double_t cson_value_get_double( cson_value const * val );

/**
   Simplified form of cson_value_fetch_string(). Returns NULL if val
   is-not-a string value.
*/
cson_string const * cson_value_get_string( cson_value const * val );

/**
   Returns a pointer to the NULL-terminated string bytes of str.
   The bytes are owned by string and will be invalided when it
   is cleaned up.

   If str is NULL then NULL is returned.

   @see cson_string_length_bytes()
   @see cson_value_get_string()
*/
char const * cson_string_cstr( cson_string const * str );

/**
   Convenience function which returns the string bytes of
   the given value if it is-a string, otherwise it returns
   NULL. Note that this does no conversion of non-string types
   to strings.

   Equivalent to cson_string_cstr(cson_value_get_string(val)).
*/
char const * cson_value_get_cstr( cson_value const * val );

/**
   Equivalent to cson_string_cmp_cstr_n(lhs, cson_string_cstr(rhs), cson_string_length_bytes(rhs)).
*/
int cson_string_cmp( cson_string const * lhs, cson_string const * rhs );

/**
   Compares lhs to rhs using memcmp()/strcmp() semantics. Generically
   speaking it returns a negative number if lhs is less-than rhs, 0 if
   they are equivalent, or a positive number if lhs is greater-than
   rhs. It has the following rules for equivalence:

   - The maximum number of bytes compared is the lesser of rhsLen and
   the length of lhs. If the strings do not match, but compare equal
   up to the just-described comparison length, the shorter string is
   considered to be less-than the longer one.
   
   - If lhs and rhs are both NULL, or both have a length of 0 then they will
   compare equal.

   - If lhs is null/length-0 but rhs is not then lhs is considered to be less-than
   rhs.

   - If rhs is null/length-0 but lhs is not then rhs is considered to be less-than
   rhs.

   - i have no clue if the results are exactly correct for UTF strings.

*/
int cson_string_cmp_cstr_n( cson_string const * lhs, char const * rhs, unsigned int rhsLen );

/**
   Equivalent to cson_string_cmp_cstr_n( lhs, rhs, (rhs&&*rhs)?strlen(rhs):0 ).
*/
int cson_string_cmp_cstr( cson_string const * lhs, char const * rhs );

/**
   Returns the length, in bytes, of str, or 0 if str is NULL. This is
   an O(1) operation.

   TODO: add cson_string_length_chars() (is O(N) unless we add another
   member to store the char length).
   
   @see cson_string_cstr()
*/
unsigned int cson_string_length_bytes( cson_string const * str );

/**
    Returns the number of UTF8 characters in str. This value will
    be at most as long as cson_string_length_bytes() for the
    same string, and less if it has multi-byte characters.

    Returns 0 if str is NULL.
*/
unsigned int cson_string_length_utf8( cson_string const * str );

/**
   Like cson_value_get_string(), but returns a copy of the underying
   string bytes, which the caller owns and must eventually free
   using free().
*/
char * cson_value_get_string_copy( cson_value const * val );

/**
   Simplified form of cson_value_fetch_object(). Returns NULL if val
   is-not-a object value.
*/
cson_object * cson_value_get_object( cson_value const * val );

/**
   Simplified form of cson_value_fetch_array(). Returns NULL if val
   is-not-a array value.
*/
cson_array * cson_value_get_array( cson_value const * val );

/**
   Const-correct form of cson_value_get_array().
*/
cson_array const * cson_value_get_array_c( cson_value const * val );

/**
   If ar is-a array and is at least (pos+1) entries long then *v (if v is not NULL)
   is assigned to the value at that position (which may be NULL).

   Ownership of the *v return value is unchanged by this call. (The
   containing array may share ownership of the value with other
   containers.)

   If pos is out of range, non-0 is returned and *v is not modified.

   If v is NULL then this function returns 0 if pos is in bounds, but does not
   otherwise return a value to the caller.
*/
int cson_array_value_fetch( cson_array const * ar, unsigned int pos, cson_value ** v );

/**
   Simplified form of cson_array_value_fetch() which returns NULL if
   ar is NULL, pos is out of bounds or if ar has no element at that
   position.
*/
cson_value * cson_array_get( cson_array const * ar, unsigned int pos );

/**
   Ensures that ar has allocated space for at least the given
   number of entries. This never shrinks the array and never
   changes its logical size, but may pre-allocate space in the
   array for storing new (as-yet-unassigned) values.

   Returns 0 on success, or non-zero on error:

   - If ar is NULL: cson_rc.ArgError

   - If allocation fails: cson_rc.AllocError
*/
int cson_array_reserve( cson_array * ar, unsigned int size );

/**
   If ar is not NULL, sets *v (if v is not NULL) to the length of the array
   and returns 0. Returns cson_rc.ArgError if ar is NULL.
*/
int cson_array_length_fetch( cson_array const * ar, unsigned int * v );

/**
   Simplified form of cson_array_length_fetch() which returns 0 if ar
   is NULL.
*/
unsigned int cson_array_length_get( cson_array const * ar );

/**
   Sets the given index of the given array to the given value.

   If ar already has an item at that index then it is cleaned up and
   freed before inserting the new item.

   ar is expanded, if needed, to be able to hold at least (ndx+1)
   items, and any new entries created by that expansion are empty
   (NULL values).

   On success, 0 is returned and ownership of v is transfered to ar.
  
   On error ownership of v is NOT modified, and the caller may still
   need to clean it up. For example, the following code will introduce
   a leak if this function fails:

   @code
   cson_array_append( myArray, cson_value_new_integer(42) );
   @endcode

   Because the value created by cson_value_new_integer() has no owner
   and is not cleaned up. The "more correct" way to do this is:

   @code
   cson_value * v = cson_value_new_integer(42);
   int rc = cson_array_append( myArray, v );
   if( 0 != rc ) {
      cson_value_free( v );
      ... handle error ...
   }
   @endcode

*/
int cson_array_set( cson_array * ar, unsigned int ndx, cson_value * v );

/**
   Appends the given value to the given array, transfering ownership of
   v to ar. On error, ownership of v is not modified. Ownership of ar
   is never changed by this function.

   This is functionally equivalent to
   cson_array_set(ar,cson_array_length_get(ar),v), but this
   implementation has slightly different array-preallocation policy
   (it grows more eagerly).
   
   Returns 0 on success, non-zero on error. Error cases include:

   - ar or v are NULL: cson_rc.ArgError

   - Array cannot be expanded to hold enough elements: cson_rc.AllocError.

   - Appending would cause a numeric overlow in the array's size:
   cson_rc.RangeError.  (However, you'll get an AllocError long before
   that happens!)

   On error ownership of v is NOT modified, and the caller may still
   need to clean it up. See cson_array_set() for the details.

*/
int cson_array_append( cson_array * ar, cson_value * v );


/**
   Creates a new cson_value from the given boolean value.

   Ownership of the new value is passed to the caller, who must
   eventually either free the value using cson_value_free() or
   inserting it into a container (array or object), which transfers
   ownership to the container. See the cson_value class documentation
   for more details.

   Returns NULL on allocation error.
*/
cson_value * cson_value_new_bool( char v );


/**
   Returns the special JSON "null" value. When outputing JSON,
   its string representation is "null" (without the quotes).
   
   See cson_value_new_bool() for notes regarding the returned
   value's memory.
*/
cson_value * cson_value_null();

/**
   Equivalent to cson_value_new_bool(1).
*/
cson_value * cson_value_true();

/**
   Equivalent to cson_value_new_bool(0).
*/
cson_value * cson_value_false();

/**
   Semantically the same as cson_value_new_bool(), but for integers.
*/
cson_value * cson_value_new_integer( cson_int_t v );

/**
   Semantically the same as cson_value_new_bool(), but for doubles.
*/
cson_value * cson_value_new_double( cson_double_t v );

/**
   Semantically the same as cson_value_new_bool(), but for strings.
   This creates a JSON value which copies the first n bytes of str.
   The string will automatically be NUL-terminated.
   
   Note that if str is NULL or n is 0, this function still
   returns non-NULL value representing that empty string.
   
   Returns NULL on allocation error.
   
   See cson_value_new_bool() for important information about the
   returned memory.
*/
cson_value * cson_value_new_string( char const * str, unsigned int n );

/**
   Allocates a new "object" value and transfers ownership of it to the
   caller. It must eventually be destroyed, by the caller or its
   owning container, by passing it to cson_value_free().

   Returns NULL on allocation error.

   Post-conditions: cson_value_is_object(value) will return true.

   @see cson_value_new_array()
   @see cson_value_free()
*/
cson_value * cson_value_new_object();

/**
   Allocates a new "array" value and transfers ownership of it to the
   caller. It must eventually be destroyed, by the caller or its
   owning container, by passing it to cson_value_free().

   Returns NULL on allocation error.

   Post-conditions: cson_value_is_array(value) will return true.

   @see cson_value_new_object()
   @see cson_value_free()
*/
cson_value * cson_value_new_array();

/**
   Frees any resources owned by v, then frees v. If v is a container
   type (object or array) its children are also freed (recursively).

   If v is NULL, this is a no-op.

   This function decrements a reference count and only destroys the
   value if its reference count drops to 0. Reference counts are
   increased by either inserting the value into a container or via
   cson_value_add_reference(). Even if this function does not
   immediately destroy the value, the value must be considered, from
   the perspective of that client code, to have been
   destroyed/invalidated by this call.

   
   @see cson_value_new_object()
   @see cson_value_new_array()
   @see cson_value_add_reference()
*/
void cson_value_free(cson_value * v);

/**
   Functionally similar to cson_array_set(), but uses a string key
   as an index. Like arrays, if a value already exists for the given key,
   it is destroyed by this function before inserting the new value.

   If v is NULL then this call is equivalent to
   cson_object_unset(obj,key). Note that (v==NULL) is treated
   differently from v having the special null value. In the latter
   case, the key is set to the special null value.

   The key may be encoded as ASCII or UTF8. Results are undefined
   with other encodings, and the errors won't show up here, but may
   show up later, e.g. during output.
   
   Returns 0 on success, non-0 on error. It has the following error
   cases:

   - cson_rc.ArgError: obj or key are NULL or strlen(key) is 0.

   - cson_rc.AllocError: an out-of-memory error

   On error ownership of v is NOT modified, and the caller may still
   need to clean it up. For example, the following code will introduce
   a leak if this function fails:

   @code
   cson_object_set( myObj, "foo", cson_value_new_integer(42) );
   @endcode

   Because the value created by cson_value_new_integer() has no owner
   and is not cleaned up. The "more correct" way to do this is:

   @code
   cson_value * v = cson_value_new_integer(42);
   int rc = cson_object_set( myObj, "foo", v );
   if( 0 != rc ) {
      cson_value_free( v );
      ... handle error ...
   }
   @endcode

   Potential TODOs:

   - Add an overload which takes a cson_value key instead. To get
   any value out of that we first need to be able to convert arbitrary
   value types to strings. We could simply to-JSON them and use those
   as keys.
*/
int cson_object_set( cson_object * obj, char const * key, cson_value * v );

/**
   Removes a property from an object.
   
   If obj contains the given key, it is removed and 0 is returned. If
   it is not found, cson_rc.NotFoundError is returned (which can
   normally be ignored by client code).

   cson_rc.ArgError is returned if obj or key are NULL or key has
   a length of 0.

   Returns 0 if the given key is found and removed.

   This is functionally equivalent calling
   cson_object_set(obj,key,NULL).
*/
int cson_object_unset( cson_object * obj, char const * key );

/**
   Searches the given object for a property with the given key. If found,
   it is returned. If no match is found, or any arguments are NULL, NULL is
   returned. The returned object is owned by obj, and may be invalidated
   by ANY operations which change obj's property list (i.e. add or remove
   properties).

   FIXME: allocate the key/value pairs like we do for cson_array,
   to get improve the lifetimes of fetched values.

   @see cson_object_fetch_sub()
   @see cson_object_get_sub()
*/
cson_value * cson_object_get( cson_object const * obj, char const * key );

/**
   Similar to cson_object_get(), but removes the value from the parent
   object's ownership. If no item is found then NULL is returned, else
   the object (now owned by the caller or possibly shared with other
   containers) is returned.

   Returns NULL if either obj or key are NULL or key has a length
   of 0.

   This function reduces the returned value's reference count but has
   the specific property that it does not treat refcounts 0 and 1
   identically, meaning that the returned object may have a refcount
   of 0. This behaviour works around a corner-case where we want to
   extract a child element from its parent and then destroy the parent
   (which leaves us in an undesireable (normally) reference count
   state).
*/
cson_value * cson_object_take( cson_object * obj, char const * key );

/**
    Fetches a property from a child (or [great-]*grand-child) object.

    obj is the object to search.

    path is a delimited string, where the delimiter is the given
    separator character.

    This function searches for the given path, starting at the given object
    and traversing its properties as the path specifies. If a given part of the
    path is not found, then this function fails with cson_rc.NotFoundError.

    If it finds the given path, it returns the value by assiging *tgt
    to it.  If tgt is NULL then this function has no side-effects but
    will return 0 if the given path is found within the object, so it can be used
    to test for existence without fetching it.
    
    Returns 0 if it finds an entry, cson_rc.NotFoundError if it finds
    no item, and any other non-zero error code on a "real" error. Errors include:

   - obj or path are NULL: cson_rc.ArgError
    
    - separator is 0, or path is an empty string or contains only
    separator characters: cson_rc.RangeError

    - There is an upper limit on how long a single path component may
    be (some "reasonable" internal size), and cson_rc.RangeError is
    returned if that length is violated.

    
    Limitations:

    - It has no way to fetch data from arrays this way. i could
    imagine, e.g., a path of "subobj.subArray.0" for
    subobj.subArray[0], or "0.3.1" for [0][3][1]. But i'm too
    lazy/tired to add this.

    Example usage:
    

    Assume we have a JSON structure which abstractly looks like:

    @code
    {"subobj":{"subsubobj":{"myValue":[1,2,3]}}}
    @endcode

    Out goal is to get the value of myValue. We can do that with:

    @code
    cson_value * v = NULL;
    int rc = cson_object_fetch_sub( object, &v, "subobj.subsubobj.myValue", '.' );
    @endcode

    Note that because keys in JSON may legally contain a '.', the
    separator must be specified by the caller. e.g. the path
    "subobj/subsubobj/myValue" with separator='/' is equivalent the
    path "subobj.subsubobj.myValue" with separator='.'. The value of 0
    is not legal as a separator character because we cannot
    distinguish that use from the real end-of-string without requiring
    the caller to also pass in the length of the string.
   
    Multiple successive separators in the list are collapsed into a
    single separator for parsing purposes. e.g. the path "a...b...c"
    (separator='.') is equivalent to "a.b.c".

    @see cson_object_get_sub()
*/
int cson_object_fetch_sub( cson_object const * obj, cson_value ** tgt, char const * path, char separator );

/**
   Convenience form of cson_object_fetch_sub() which returns NULL if the given
   item is not found.
*/
cson_value * cson_object_get_sub( cson_object const * obj, char const * path, char sep );


/**
   An iterator type for traversing object properties.

   Its values must be considered private, not to be touched by client
   code.

   @see cson_object_iter_init()
   @see cson_object_iter_next()
*/
struct cson_object_iterator
{
    
    /** @internal
        The underlying object.
    */
    cson_object const * obj;
    /** @internal
        Current position in the property list.
     */
    unsigned int pos;
};
typedef struct cson_object_iterator cson_object_iterator;

/**
   Empty-initialized cson_object_iterator object.
*/
#define cson_object_iterator_empty_m {NULL/*obj*/,0/*pos*/}

/**
   Empty-initialized cson_object_iterator object.
*/
extern const cson_object_iterator cson_object_iterator_empty;

/**
   Initializes the given iterator to point at the start of obj's
   properties. Returns 0 on success or cson_rc.ArgError if !obj
   or !iter.

   obj must outlive iter, or results are undefined. Results are also
   undefined if obj is modified while the iterator is active.

   @see cson_object_iter_next()
*/
int cson_object_iter_init( cson_object const * obj, cson_object_iterator * iter );

/** @struct cson_kvp

This class represents a key/value pair and is used for storing
object properties. It is opaque to client code, and the public
API only uses this type for purposes of iterating over cson_object
properties using the cson_object_iterator interfaces.
*/

typedef struct cson_kvp cson_kvp;

/**
   Returns the next property from the given iterator's object, or NULL
   if the end of the property list as been reached.

   Note that the order of object properties is undefined by the API,
   and may change from version to version.

   The returned memory belongs to the underlying object and may be
   invalidated by any changes to that object.

   Example usage:

   @code
   cson_object_iterator it;
   cson_object_iter_init( myObject, &it ); // only fails if either arg is 0
   cson_kvp * kvp;
   cson_string const * key;
   cson_value const * val;
   while( (kvp = cson_object_iter_next(&it) ) )
   {
       key = cson_kvp_key(kvp);
       val = cson_kvp_value(kvp);
       ...
   }
   @endcode

   There is no need to clean up an iterator, as it holds no dynamic resources.
   
   @see cson_kvp_key()
   @see cson_kvp_value()
*/
cson_kvp * cson_object_iter_next( cson_object_iterator * iter );


/**
   Returns the key associated with the given key/value pair,
   or NULL if !kvp. The memory is owned by the object which contains
   the key/value pair, and may be invalidated by any modifications
   to that object.
*/
cson_string const * cson_kvp_key( cson_kvp const * kvp );

/**
   Returns the value associated with the given key/value pair,
   or NULL if !kvp. The memory is owned by the object which contains
   the key/value pair, and may be invalidated by any modifications
   to that object.
*/
cson_value * cson_kvp_value( cson_kvp const * kvp );

/** @typedef some unsigned int type cson_size_t

*/
typedef unsigned int cson_size_t;

/**
   A generic buffer class.

   They can be used like this:

   @code
   cson_buffer b = cson_buffer_empty;
   int rc = cson_buffer_reserve( &buf, 100 );
   if( 0 != rc ) { ... allocation error ... }
   ... use buf.mem ...
   ... then free it up ...
   cson_buffer_reserve( &buf, 0 );
   @endcode

   To take over ownership of a buffer's memory:

   @code
   void * mem = b.mem;
   // mem is b.capacity bytes long, but only b.used
   // bytes of it has been "used" by the API.
   b = cson_buffer_empty;
   @endcode

   The memory now belongs to the caller and must eventually be
   free()d.
*/
struct cson_buffer
{
    /**
       The number of bytes allocated for this object.
       Use cson_buffer_reserve() to change its value.
     */
    cson_size_t capacity;
    /**
       The number of bytes "used" by this object. It is not needed for
       all use cases, and management of this value (if needed) is up
       to the client. The cson_buffer public API does not use this
       member. The intention is that this can be used to track the
       length of strings which are allocated via cson_buffer, since
       they need an explicit length and/or null terminator.
     */
    cson_size_t used;

    /**
       This is a debugging/metric-counting value
       intended to help certain malloc()-conscious
       clients tweak their memory reservation sizes.
       Each time cson_buffer_reserve() expands the
       buffer, it increments this value by 1.
    */
    cson_size_t timesExpanded;

    /**
       The memory allocated for and owned by this buffer.
       Use cson_buffer_reserve() to change its size or
       free it. To take over ownership, do:

       @code
       void * myptr = buf.mem;
       buf = cson_buffer_empty;
       @endcode

       (You might also need to store buf.used and buf.capacity,
       depending on what you want to do with the memory.)
       
       When doing so, the memory must eventually be passed to free()
       to deallocate it.
    */
    unsigned char * mem;
};
/** Convenience typedef. */
typedef struct cson_buffer cson_buffer;

/** An empty-initialized cson_buffer object. */
#define cson_buffer_empty_m {0/*capacity*/,0/*used*/,0/*timesExpanded*/,NULL/*mem*/}
/** An empty-initialized cson_buffer object. */
extern const cson_buffer cson_buffer_empty;

/**
   Uses cson_output() to append all JSON output to the given buffer
   object. The semantics for the (v, opt) parameters, and the return
   value, are as documented for cson_output(). buf must be a non-NULL
   pointer to a properly initialized buffer (see example below).

   Ownership of buf is not changed by calling this.

   On success 0 is returned and the contents of buf.mem are guaranteed
   to be NULL-terminated. On error the buffer might contain partial
   contents, and it should not be used except to free its contents.

   On error non-zero is returned. Errors include:

   - Invalid arguments: cson_rc.ArgError

   - Buffer cannot be expanded (runs out of memory): cson_rc.AllocError
   
   Example usage:

   @code
   cson_buffer buf = cson_buffer_empty;
   // optional: cson_buffer_reserve(&buf, 1024 * 10);
   int rc = cson_output_buffer( myValue, &buf, NULL );
   if( 0 != rc ) {
       ... error! ...
   }
   else {
       ... use buffer ...
       puts((char const*)buf.mem);
   }
   // In both cases, we eventually need to clean up the buffer:
   cson_buffer_reserve( &buf, 0 );
   // Or take over ownership of its memory:
   {
       char * mem = (char *)buf.mem;
       buf = cson_buffer_empty;
       ...
       free(mem);
   }
   @endcode
   
   @see cson_output()
   
*/
int cson_output_buffer( cson_value const * v, cson_buffer * buf,
                        cson_output_opt const * opt );

/**
   This works identically to cson_parse_string(), but takes a
   cson_buffer object as its input.  buf->used bytes of buf->mem are
   assumed to be valid JSON input, but it need not be NUL-terminated
   (we only read up to buf->used bytes). The value of buf->used is
   assumed to be the "string length" of buf->mem, i.e. not including
   the NUL terminator.

   Returns 0 on success, non-0 on error.

   See cson_parse() for the semantics of the tgt, opt, and err
   parameters.
*/
int cson_parse_buffer( cson_value ** tgt, cson_buffer const * buf,
                       cson_parse_opt const * opt, cson_parse_info * err );


/**
   Reserves the given amount of memory for the given buffer object.

   If n is 0 then buf->mem is freed and its state is set to
   NULL/0 values.

   If buf->capacity is less than or equal to n then 0 is returned and
   buf is not modified.

   If n is larger than buf->capacity then buf->mem is (re)allocated
   and buf->capacity contains the new length. Newly-allocated bytes
   are filled with zeroes.

   On success 0 is returned. On error non-0 is returned and buf is not
   modified.

   buf->mem is owned by buf and must eventually be freed by passing an
   n value of 0 to this function.

   buf->used is never modified by this function.
*/
int cson_buffer_reserve( cson_buffer * buf, cson_size_t n );

/**
   Fills all bytes of the given buffer with the given character.
   Returns the number of bytes set (buf->capacity), or 0 if
   !buf or buf has no memory allocated to it.
*/
cson_size_t cson_buffer_fill( cson_buffer * buf, char c );

/**
    Uses a cson_data_source_f() function to buffer input into a
    cson_buffer.

   dest must be a non-NULL, initialized (though possibly empty)
   cson_buffer object. Its contents, if any, will be overwritten by
   this function, and any memory it holds might be re-used.

   The src function is called, and passed the state parameter, to
   fetch the input. If it returns non-0, this function returns that
   error code. src() is called, possibly repeatedly, until it reports
   that there is no more data.

   Whether or not this function succeeds, dest still owns any memory
   pointed to by dest->mem, and the client must eventually free it by
   calling cson_buffer_reserve(dest,0).

   dest->mem might (and possibly will) be (re)allocated by this
   function, so any pointers to it held from before this call might be
   invalidated by this call.
   
   On error non-0 is returned and dest has almost certainly been
   modified but its state must be considered incomplete.

   Errors include:

   - dest or src are NULL (cson_rc.ArgError)

   - Allocation error (cson_rc.AllocError)

   - src() returns an error code

   Whether or not the state parameter may be NULL depends on
   the src implementation requirements.

   On success dest will contain the contents read from the input
   source. dest->used will be the length of the read-in data, and
   dest->mem will point to the memory. dest->mem is automatically
   NUL-terminated if this function succeeds, but dest->used does not
   count that terminator. On error the state of dest->mem must be
   considered incomplete, and is not guaranteed to be NUL-terminated.

    Example usage:

    @code
    cson_buffer buf = cson_buffer_empty;
    int rc = cson_buffer_fill_from( &buf,
                                    cson_data_source_FILE,
                                    stdin );
    if( rc )
    {
        fprintf(stderr,"Error %d (%s) while filling buffer.\n",
                rc, cson_rc_string(rc));
        cson_buffer_reserve( &buf, 0 );
        return ...;
    }
    ... use the buf->mem ...
    ... clean up the buffer ...
    cson_buffer_reserve( &buf, 0 );
    @endcode

    To take over ownership of the buffer's memory, do:

    @code
    void * mem = buf.mem;
    buf = cson_buffer_empty;
    @endcode

    In which case the memory must eventually be passed to free() to
    free it.    
*/
int cson_buffer_fill_from( cson_buffer * dest, cson_data_source_f src, void * state );


/**
   Increments the reference count for the given value. This is a
   low-level operation and should not normally be used by client code
   without understanding exactly what side-effects it introduces.
   Mis-use can lead to premature destruction or cause a value instance
   to never be properly destructed (i.e. a memory leak).

   This function is probably only useful for the following cases:

   - You want to hold a reference to a value which is itself contained
   in one or more containers, and you need to be sure that your
   reference outlives the container(s) and/or that you can free your
   copy of the reference without invaliding any references to the same
   value held in containers.

   - You want to implement "value sharing" behaviour without using an
   object or array to contain the shared value. This can be used to
   ensure the lifetime of the shared value instance. Each sharing
   point adds a reference and simply passed the value to
   cson_value_free() when they're done. The object will be kept alive
   for other sharing points which added a reference.

   Normally any such value handles would be invalidated when the
   parent container(s) is/are cleaned up, but this function can be
   used to effectively delay the cleanup.
   
   This function, at its lowest level, increments the value's
   reference count by 1.

   To decrement the reference count, pass the value to
   cson_value_free(), after which the value must be considered, from
   the perspective of that client code, to be destroyed (though it
   will not be if there are still other live references to
   it). cson_value_free() will not _actually_ destroy the value until
   its reference count drops to 0.

   Returns 0 on success. The only error conditions are if v is NULL
   (cson_rc.ArgError) or if the reference increment would overflow
   (cson_rc.RangeError). In theory a client would get allocation
   errors long before the reference count could overflow (assuming
   those reference counts come from container insertions, as opposed
   to via this function).

   Insider notes which clients really need to know:
   
   For shared/constant value instances, such as those returned by
   cson_value_true() and cson_value_null(), this function has no side
   effects - it does not actually modify the reference count because
   (A) those instances are shared across all client code and (B) those
   objects are static and never get cleaned up. However, that is an
   implementation detail which client code should not rely on. In
   other words, if you call cson_value_add_reference() 3 times using
   the value returned by cson_value_true() (which is incidentally a
   shared cson_value instance), you must eventually call
   cson_value_free() 3 times to (semantically) remove those
   references. However, internally the reference count for that
   specific cson_value instance will not be modified and those
   objects will never be freed (they're stack-allocated).

   It might be interesting to note that newly-created objects
   have a reference count of 0 instead of 1. This is partly because
   if the initial reference is counted then it makes ownership
   problematic when inserting values into containers. e.g. consider the
   following code:

   @code
   // ACHTUNG: this code is hypothetical and does not reflect
   // what actually happens!
   cson_value * v =
        cson_value_new_integer( 42 ); // v's refcount = 1
   cson_array_append( myArray, v ); // v's refcount = 2
   @endcode

   If that were the case, the client would be forced to free his own
   reference after inserting it into the container (which is a bit
   counter-intuitive as well as intrusive). It would look a bit like
   the following and would have to be done after every create/insert
   operation:

   @code
   // ACHTUNG: this code is hypothetical and does not reflect
   // what actually happens!
   cson_array_append( myArray, v ); // v's refcount = 2
   cson_value_free( v ); // v's refcount = 1
   @endcode

   (As i said: it's counter-intuitive and intrusive.)

   Instead, values start with a refcount of 0 and it is only increased
   when the value is added to an object/array container or when this
   function is used to manually increment it. cson_value_free() treats
   a refcount of 0 or 1 equivalently, destroying the value
   instance. The only semantic difference between 0 and 1, for
   purposes of cleaning up, is that a value with a non-0 refcount has
   been had its refcount adjusted, whereas a 0 refcount indicates a
   fresh, "unowned" reference.
*/
int cson_value_add_reference( cson_value * v );

#if 0
/**
   DO NOT use this unless you know EXACTLY what you're doing.
   It is only in the public API to work around a couple corner
   cases involving extracting child elements and discarding
   their parents.

   This function sets v's reference count to the given value.
   It does not clean up the object if rc is 0.

   Returns 0 on success, non-0 on error.
*/
int cson_value_refcount_set( cson_value * v, unsigned short rc );
#endif

/**
   Deeply copies a JSON value, be it an object/array or a "plain"
   value (e.g. number/string/boolean). If cv is not NULL then this
   function makes a deep clone of it and returns that clone. Ownership
   of the clone is transfered to the caller, who must eventually free
   the value using cson_value_free() or add it to a container
   object/array to transfer ownership to the container. The returned
   object will be of the same logical type as orig.

   ACHTUNG: if orig contains any cyclic references at any depth level
   this function will endlessly recurse. (Having _any_ cyclic
   references violates this library's requirements.)
   
   Returns NULL if orig is NULL or if cloning fails. Assuming that
   orig is in a valid state, the only "likely" error case is that an
   allocation fails while constructing the clone. In other words, if
   cloning fails due to something other than an allocation error then
   either orig is in an invalid state or there is a bug.
*/
cson_value * cson_value_clone( cson_value const * orig );

/* LICENSE

This software's source code, including accompanying documentation and
demonstration applications, are licensed under the following
conditions...

Certain files are imported from external projects and have their own
licensing terms. Namely, the JSON_parser.* files. See their files for
their official licenses, but the summary is "do what you want [with
them] but leave the license text and copyright in place."

The author (Stephan G. Beal [http://wanderinghorse.net/home/stephan/])
explicitly disclaims copyright in all jurisdictions which recognize
such a disclaimer. In such jurisdictions, this software is released
into the Public Domain.

In jurisdictions which do not recognize Public Domain property
(e.g. Germany as of 2011), this software is Copyright (c) 2011 by
Stephan G. Beal, and is released under the terms of the MIT License
(see below).

In jurisdictions which recognize Public Domain property, the user of
this software may choose to accept it either as 1) Public Domain, 2)
under the conditions of the MIT License (see below), or 3) under the
terms of dual Public Domain/MIT License conditions described here, as
they choose.

The MIT License is about as close to Public Domain as a license can
get, and is described in clear, concise terms at:

    http://en.wikipedia.org/wiki/MIT_License

The full text of the MIT License follows:

--
Copyright (c) 2011 Stephan G. Beal (http://wanderinghorse.net/home/stephan/)

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

--END OF MIT LICENSE--

For purposes of the above license, the term "Software" includes
documentation and demonstration source code which accompanies
this software. ("Accompanies" = is contained in the Software's
primary public source code repository.)

*/

#if defined(__cplusplus)
} /*extern "C"*/
#endif

#endif /* WANDERINGHORSE_NET_CSON_H_INCLUDED */
/* end file include/wh/cson/cson.h */
/* begin file include/wh/cson/cson_sqlite3.h */
/** @file cson_sqlite3.h

This file contains cson's public sqlite3-to-JSON API declarations
and API documentation. If CSON_ENABLE_SQLITE3 is not defined,
or is defined to 0, then including this file will have no side-effects
other than defining CSON_ENABLE_SQLITE3 (if it was not defined) to 0
and defining a few include guard macros. i.e. if CSON_ENABLE_SQLITE3
is not set to a true value then the API is not visible.

This API requires that <sqlite3.h> be in the INCLUDES path and that
the client eventually link to (or directly embed) the sqlite3 library.
*/
#if !defined(WANDERINGHORSE_NET_CSON_SQLITE3_H_INCLUDED)
#define WANDERINGHORSE_NET_CSON_SQLITE3_H_INCLUDED 1
#if !defined(CSON_ENABLE_SQLITE3)
#  if defined(DOXYGEN)
#define CSON_ENABLE_SQLITE3 1
#  else
#define CSON_ENABLE_SQLITE3 1
#  endif
#endif

#if CSON_ENABLE_SQLITE3 /* we do this here for the sake of the amalgamation build */
#include <sqlite3.h>

#if defined(__cplusplus)
extern "C" {
#endif

/**
    Converts the results of an sqlite3 SELECT statement to JSON,
    in the form of a cson_value object tree.
    
    st must be a prepared, but not yet traversed, SELECT query.
    tgt must be a pointer to NULL (see the example below). If
    either of those arguments are NULL, cson_rc.ArgError is returned.
    
    This walks the query results and returns a JSON object which
    has a different structure depending on the value of the 'fat'
    argument.
    
    
    If 'fat' is 0 then the structure is:
    
    @code
    {
        "columns":["colName1",..."colNameN"],
        "rows":[
            [colVal0, ... colValN],
            [colVal0, ... colValN],
            ...
        ]
    }
    @endcode
    
    In the "non-fat" format the order of the columns and row values is
    guaranteed to be the same as that of the underlying query.
    
    If 'fat' is not 0 then the structure is:
    
    @code
    {
        "columns":["colName1",..."colNameN"],
        "rows":[
            {"colName1":value1,..."colNameN":valueN},
            {"colName1":value1,..."colNameN":valueN},
            ...
        ]
    }
    @endcode

    In the "fat" format, the order of the "columns" entries is guaranteed
    to be the same as the underlying query fields, but the order
    of the keys in the "rows" might be different and might in fact
    change when passed through different JSON implementations,
    depending on how they implement object key/value pairs.

    On success it returns 0 and assigns *tgt to a newly-allocated
    JSON object tree (using the above structure), which the caller owns.
    If the query returns no rows, the "rows" value will be an empty
    array, as opposed to null.
    
    On error non-0 is returned and *tgt is not modified.
    
    The error code cson_rc.IOError is used to indicate a db-level
    error, and cson_rc.TypeError is returned if sqlite3_column_count(st)
    returns 0 or less (indicating an invalid or non-SELECT statement).
    
    The JSON data types are determined by the column type as reported
    by sqlite3_column_type():
    
    SQLITE_INTEGER: integer
    
    SQLITE_FLOAT: double
    
    SQLITE_TEXT or SQLITE_BLOB: string, and this will only work if
    the data is UTF8 compatible.
    
    If the db returns a literal or SQL NULL for a value it is converted
    to a JSON null. If it somehow finds a column type it cannot handle,
    the value is also converted to a NULL in the output.

    Example
    
    @code
    cson_value * json = NULL;
    int rc = cson_sqlite3_stmt_to_json( myStatement, &json, 1 );
    if( 0 != rc ) { ... error ... }
    else {
        cson_output_FILE( json, stdout, NULL );
        cson_value_free( json );
    }
    @endcode
*/
int cson_sqlite3_stmt_to_json( sqlite3_stmt * st, cson_value ** tgt, char fat );

/**
    A convenience wrapper around cson_sqlite3_stmt_to_json(), which
    takes SQL instead of a sqlite3_stmt object. It has the same
    return value and argument semantics as that function.
*/
int cson_sqlite3_sql_to_json( sqlite3 * db, cson_value ** tgt, char const * sql, char fat );

#if defined(__cplusplus)
} /*extern "C"*/
#endif
    
#endif /* CSON_ENABLE_SQLITE3 */
#endif /* WANDERINGHORSE_NET_CSON_SQLITE3_H_INCLUDED */
/* end file include/wh/cson/cson_sqlite3.h */
/* begin file include/wh/cson/cson_session.h */
#if !defined(WANDERINGHORSE_NET_CSON_SESSION_H_INCLUDED)
#define WANDERINGHORSE_NET_CSON_SESSION_H_INCLUDED 1

/** @page page_cson_session cson Session API

The cson_session API provides a small interface,
called cson_sessmgr, which defines the basic operations
needed for implementent persistent application state,
across application sessions, by storing the state as
JSON data in "some back-end storage." The exact underlying
storage is not specified by the interface, but two
implementations are provided by the library:

- File-based sessions.

- Database-based sessions, using libcpdo for connection
abstraction.

libcpdo is included, in full, in the cson source tree,
but can also be found on its web page:

    http://fossil.wanderinghorse.net/repos/cpdo/

@see cson_sessmgr_register()
@see cson_sessmgr_load()
@see cson_sessmgr_names()
@see cson_sessmgr
@see cson_sessmgr_api
*/


#if defined(__cplusplus)
extern "C" {
#endif

    typedef struct cson_sessmgr cson_sessmgr;
    typedef struct cson_sessmgr_api cson_sessmgr_api;

    /** @struct cson_sessmgr_api
        
       Defines operations required by "session managers." Session managers
       are responsible for loading and saving cson session information
       in the form of JSON data.

       @see cson_sessmgr
    */
    struct cson_sessmgr_api
    {
        /**
           Loads/creates a session object (JSON data). The
           implementation must use the given identifier for loading an
           existing session, creating the session if createIfNeeded is
           true and the session data is not found. If createIfNeeded
           is true then the implementation must create an Object for
           the session root, as opposed to an Array or other JSON
           value. Clients are allowed to use non-Objects as their
           sessions but doing so would seem to have no benefit, and is
           not recommended.

           If the given id cannot be found then cson_rc.NotFoundError
           must be returned. On success it must assign the root node
           of the session tree to *tgt and return 0.  On error *tgt
           must not be modified and non-zero must be returned.

           On success ownership of *tgt is transfered to the caller.

           Error conditions include:

           - self, tgt, or id are NULL: cson_rc.ArgError

           - id is "not valid" (the meaning of "valid" is
           implementation-dependent): cson_rc.ArgError

           The identifier string must be NUL-terminated. Its maximum
           length, if any, is implementation-dependent.
        */
        int (*load)( cson_sessmgr * self, cson_value ** tgt, char const * id );

        /**
           Must save the given JSON object tree to the underlying storage, using the given identifier
           as its unique key. It must overwrite any existing session with that same identifier.
        */
        int (*save)( cson_sessmgr * self, cson_value const * root, char const * id );

        /**
           Must remove all session data associated with the given id.

           Must return 0 on success, non-0 on error.
        */
        int (*remove)( cson_sessmgr * self, char const * id );
        /**
           Must free up any resources used by the self object and then
           free self. After calling this, further use of the self
           object invokes undefined behaviour.
        */
        void (*finalize)( cson_sessmgr * self );
    };

    /**
       cson_sessmgr is base interface type for concrete
       cson_sessmgr_api implementations.  Each holds a pointer to its
       underlying implementation and to implementation-private
       data.
    
       @see cson_sessmgr_register()
       @see cson_sessmgr_load()
       @see cson_sessmgr_names()
       @see cson_sessmgr_api
    */
    struct cson_sessmgr
    {
        /**
           The concrete implementation functions for this
           session manager instance.
        */
        const cson_sessmgr_api * api;
        /**
           Private implementation date for this session manager
           instance. It is owned by this object and will be freed when
           thisObject->api->finalize(thisObject) is called. Client
           code must never use nor rely on the type/contents of the
           memory stored here.
        */
        void * impl;
    };

    /**
       A typedef for factory functions which instantiate cson_sessmgr
       instances.

       The semantics are:

       - tgt must be a non-NULL pointer where the result object can be
       stored. If it is NULL, cson_rc.ArgError must be returned.

       - opt (configuration options) may or may not be required,
       depending on the manager. If it is required and not passed in,
       cson_rc.ArgError must be returned. If the config options are
       required but the passed-in object is missing certain values, or
       has incorrect values, the implementation may substitute
       sensible defaults (if possible) or return cson_rc.ArgError.

       - On error non-0 (one of the cson_rc values) must be returned
       and tgt must not be modified.

       - On success *tgt must be pointed to the new manager object,
       zero must be returned, and the caller takes over ownership of
       the *tgt value (and must eventually free it with
       obj->api->finalize(obj)).
    */
    typedef int (*cson_sessmgr_factory_f)( cson_sessmgr ** tgt, cson_object const * config );
    
#define cson_sessmgr_empty_m { NULL/*api*/, NULL/*impl*/ }

    /**
       Registers a session manager by name. The given name must be a
       NUL-terminaed string shorter than some internal limit
       (currently 32 bytes, including the trailing NUL). f must be a
       function conforming to the cson_sessmgr_factory_f() interface.

       On success returns 0.

       On error either one of the arguments was invalid, an entry with
       the given name was already found, or no space is left in the
       internal registration list. The API guarantees that at least 10
       slots are initially available, and it is not anticipated that
       more than a small handful of them will ever be used.

       This function is not threadsafe - do not register factories
       concurrently from multiple threads.

       By default the following registrations are (possibly)
       pre-installed:

       - "file" = cson_sessmgr_file()

       - "cpdo" = cson_sessmgr_cpdo() IF this library is compiled with
       the macro CSON_ENABLE_CPDO set to a true value. Exactly which
       databases are supported by that back-end (if any) are
       determined by how the cpdo library code is compiled.

       - "whio_ht" = cson_sessmgr_whio_ht() IF this library is compiled
       with whio support.

       - "whio_epfs" = cson_sessmgr_whio_epfs() IF this library is
       compiled with whio support.
    */
    int cson_sessmgr_register( char const * name, cson_sessmgr_factory_f f );

    /**
       A front-end to loading cson_sessmgr intances by their
       cson_session-conventional name. The first arguments must be a
       NUL-terminated string holding the name of the session manager
       driver. The other two arguments have the same semantics as for
       cson_sessmgr_factory_f(), so see that typedef's documentation
       regarding, e.g., ownership of the *tgt value.

       This function is thread-safe with regards to itself but not
       with regards to cson_sessmgr_register(). That is, it is legal
       to call this function concurrently from multiple threads,
       provided the arguments themselves are not being used
       concurrently. However, it is not safe to call this function
       when cson_sessmgr_register() is being called from another
       thread, as that function modifies the lookup table used by this
       function.

       On success 0 is returned and the ownership of *tgt is as
       documented for cson_sessmgr_factory_f(). On error non-0 is
       returned and tgt is not modified.
    */
    int cson_sessmgr_load( char const * name, cson_sessmgr ** tgt, cson_object const * opt );

    /**
       Returns the list of session managers registered via
       cson_sessmgr_register(). This function is not thread-safe in
       conjunction with cson_sessmgr_register(), and results are
       undefined if that function is called while this function is
       called or the results of this function call are being used.

       The returned array is never NULL but has a NULL as its final
       entry.

       Example usage:

       @code
       char const * const * mgr = cson_sessmgr_names();
       for( ; *mgr; ++mgr ) puts( *mgr );
       @endcode
    */
    char const * const * cson_sessmgr_names();
    
    /**
       A cson_sessmgr_factory_f() implementation which returns a new
       session manager which uses local files for storage.

       tgt must be a non-NULL pointer where the result can be stored.
       
       The opt object may be NULL or may be a configuration object
       with the following structure:

       @code
       {
       dir: string (directory to store session files in),
       prefix: string (prefix part of filename),
       suffix: string (file extension, including leading '.')
       }
       @endcode

       Any missing options will assume (unspecified) default values.
       This routine does not ensure the validity of the option values,
       other than to make sure they are strings.

       The returned object is owned by the caller, who must eventually
       free it using obj->api->finalize(obj). If it returns NULL,
       the error was an out-of-memory condition or tgt was NULL.

       On error non-0 is returned, but the only error conditions are
       allocation errors and (NULL==tgt), which will return
       cson_rc.AllocError resp. cson_rc.ArgError.

       Threading notes:

       - As long as no two operations on these manager instances use
       the same JSON object and/or session ID at the same time,
       multi-threaded usage should be okay. All save()/load()/remove()
       data is local to those operations, with the exception of the
       input arguments (which must not be used concurrently to those
       calls).

       Storage locking:

       - No locking of input/output files is done, under the
       assumption that only one thread/process will be using a given
       session ID (which should, after all, be unique world-wide).  If
       sessions will only be read, not written, there is little danger
       of something going wrong vis-a-vis locking (assuming the
       session files exists and can be read).

       TODO:

       - Add a config option to enable storage locking. If we'll
       re-implement this to use the whio API under the hood then we
       could use the (slightly simpler) whio_lock API for this.
    */
    int cson_sessmgr_file( cson_sessmgr ** tgt, cson_object const * opt );

    /**
       This is only available if cson is compiled with cpdo support.

       Implements the cson_sessmgr_factory_f() interface.
       
       This function tries to create a database connection using the options
       supplied in the opt object. The opt object must structurarly look like:

       @code
       {
       "dsn": "cpdo dsn string",
       "user": "string",
       "password": "string",
       "table": "table_name_where_sessions_are_stored",
       "fieldId": "field_name_for_session_id (VARCHAR/STRING)",
       "fieldTimestamp": "field_name_for_last_saved_timestamp (INTEGER)",
       "fieldSession": "field_name_for_session_data (TEXT)"
       }
       @endcode

       On success it returns 0 and sets *tgt to the new session manager,
       which is owned by the caller and must eventually be freed by calling
       obj->api->finalize(obj).

       This function can fail for any number of reasons:

       - Any parameters are NULL (cson_rc.ArgError).

       - cpdo cannot connect to the given DSN with the given
       username/password. Any error in establishing a connection causes
       cson_rc.IOError to be returned, as opposed to the underlying
       cpdo error code.

       - Any of the "table" or "fieldXXX" properties are NULL. It
       needs these data in order to know where to load/save sessions.


       If any required options are missing, cson_rc.ArgError is
       returned.

       TODO: add option "preferBlob", which can be used to set the db
       field type preference for the fieldSession field to
       blob. Currently it prefers string but will try blob operations
       if string ops fail.  Blobs have the disadvantage of much larger
       encoded sizes but the advantage that the JSON data is encoded
       (at least by sqlite3) as a hex number stream, making it
       unreadable to casual observers.       

       @endcode
    */
    int cson_sessmgr_cpdo( cson_sessmgr ** tgt, cson_object const * opt );

    /**
       This cson_sessmgr_factory_f() implementation might or might not
       be compiled in, depending on the mood of the cson
       maintainer. It is very niche-market, and primarily exists just
       to test (and show off) the whio_ht code.

       It uses libwhio's on-storage hashtable (called whio_ht)
       as the underlying storage:
       
       http://fossil.wanderinghorse.net/repos/whio/index.cgi/wiki/whio_ht

       The opt object must not be NULL and must contain a single
       string property named "file" which contains the path to the
       whio_ht file to use for sessions. That file must have been
       previously created, either programatically using the whio_ht
       API or using whio-ht-tool:

       http://fossil.wanderinghorse.net/repos/whio/index.cgi/wiki/whio_ht_tool

       See cson_sessmgr_factory_f() for the semantics of the tgt
       argument and the return value.

       Threading notes:

       While the underlying hashtable supports a client-defined mutex,
       this usage of it does not set one (because we have no default
       one to use). What this means for clients is that they must not
       use this session manager from multiple threads, nor may they
       use multiple instances in the same process which use the same
       underlying hashtable file from multiple threads. How best to
       remedy this (allowing the client to tell this API what mutex to
       use) is not yet clear. Maybe a global whio_mutex object which
       the client must initialize before instantiating these session
       managers.
       
       Storage Locking:

       If the underlying filesystem reports that it supports file
       locking (via the whio_lock API, basically meaning POSIX
       fcntl()-style locking) the the session manager will use it. For
       the load() operation a read lock is acquired and for
       save()/remove() a write lock. The operations will fail if
       locking fails, the exception being if the device reports that
       it doesn't support locking, in which case we optimistically
       save/load/remove without locking.

       Remember that in POSIX-style locking, a single process does not
       see its own locks and can overwrite locks set via other
       threads. This means that multi-threaded use of a given
       instance, or multiple instances in the same process using the
       same underlying hashtable file, will likely eventually corrupt
       the hashtable.

       TODO:

       - Add a config option to disable storage locking, for clients
       who really don't want to use it.
    */
    int cson_sessmgr_whio_ht( cson_sessmgr ** tgt, cson_object const * opt );

    /**
       This cson_sessmgr_factory_f() implementation might or might not
       be compiled in, depending on the mood of the cson
       maintainer. It is very niche-market, and primarily exists just
       to test (and show off) the whio_epfs code.

       It uses libwhio's embedded filesystem (called whio_epfs) as the
       underlying storage:
       
       http://fossil.wanderinghorse.net/repos/whio/index.cgi/wiki/whio_epfs

       The opt object must not be NULL and must contain a single
       string property named "file" which contains the path to the
       whio_epfs "container file" to use for storing sessions. That
       file must have been previously created, either programatically
       using the whio_epfs API or using whio-epfs-mkfs:

       http://fossil.wanderinghorse.net/repos/whio/index.cgi/wiki/whio_epfs_mkfs

       The EPFS container file MUST be created with a "namer"
       installed. See the above page for full details and examples.
       
       See cson_sessmgr_factory_f() for the semantics of the tgt
       argument and the return value.

       Threading notes:

       - It is not legal to use this session manager from multiple threads.
       Doing so will eventually corrupt the underlying EFS if multiple writers
       work concurrently, and will also eventually _appear_ corrupt to multiple
       readers.

       Storage locking:

       The underlying storage (EFS container file) is locked (with a
       write lock) for the lifetime the the returned session manager
       IF the storage reports that it supports locking. Unlocked
       write access from an outside application will corrupt the EFS.

       TODOs:

       - Add config option to explicitly disable locking support.
    */
    int cson_sessmgr_whio_epfs( cson_sessmgr ** tgt, cson_object const * opt );
    
#if 0
    /** TODO? dummy manager which has no i/o support. */
    int cson_sessmgr_transient( cson_sessmgr ** tgt );
#endif

/* LICENSE

This software's source code, including accompanying documentation and
demonstration applications, are licensed under the following
conditions...

Certain files are imported from external projects and have their own
licensing terms. Namely, the JSON_parser.* files. See their files for
their official licenses, but the summary is "do what you want [with
them] but leave the license text and copyright in place."

The author (Stephan G. Beal [http://wanderinghorse.net/home/stephan/])
explicitly disclaims copyright in all jurisdictions which recognize
such a disclaimer. In such jurisdictions, this software is released
into the Public Domain.

In jurisdictions which do not recognize Public Domain property
(e.g. Germany as of 2011), this software is Copyright (c) 2011 by
Stephan G. Beal, and is released under the terms of the MIT License
(see below).

In jurisdictions which recognize Public Domain property, the user of
this software may choose to accept it either as 1) Public Domain, 2)
under the conditions of the MIT License (see below), or 3) under the
terms of dual Public Domain/MIT License conditions described here, as
they choose.

The MIT License is about as close to Public Domain as a license can
get, and is described in clear, concise terms at:

    http://en.wikipedia.org/wiki/MIT_License

The full text of the MIT License follows:

--
Copyright (c) 2011 Stephan G. Beal (http://wanderinghorse.net/home/stephan/)

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

--END OF MIT LICENSE--

For purposes of the above license, the term "Software" includes
documentation and demonstration source code which accompanies
this software. ("Accompanies" = is contained in the Software's
primary public source code repository.)

*/

#if defined(__cplusplus)
} /*extern "C"*/
#endif

#endif /* WANDERINGHORSE_NET_CSON_SESSION_H_INCLUDED */
/* end file include/wh/cson/cson_session.h */
/* begin file include/wh/cson/cson_cgi.h */
#if !defined(WANDERINGHORSE_NET_CSON_CGI_H_INCLUDED)
#define WANDERINGHORSE_NET_CSON_CGI_H_INCLUDED 1

/** @page page_cson_cgi cson CGI API

cson_cgi is a small framework encapsulating features usefor for
writing JSON-only applications (primarily CGI apps) in C. It is based
off of the cson JSON library:

    http://fossil.wanderinghorse.net/repos/cson/

In essence, it takes care of the basic CGI-related app setup, making
the data somewhat more accessible for client purposes.  Clients
create, as output, a single JSON object. The framework takes care of
outputing it, along with any necessary HTTP headers.


Primary features:

- Uses cson for its JSON handling, so it's pretty simple to use.

- Provides a simple-to-use mini-framework for writing CGI applications
which generate only JSON output.

- Various sources of system data are converted by the framework to
JSON for use by the client. This includes HTTP GET, OS environment,
command-line arguments, HTTP cookies, and (with some limitations) HTTP
POST.

- Can read unencoded JSON POST data (TODO: read in form-urlencoded as
a JSON object).

- Supports an optional JSON config file.

- Optional persistent sessions using files, sqlite3, or MySQL5
for the storage.


Primary misfeatures:

- Very young and not yet complete.

- Intended for writing apps which ONLY generate JSON data, not HTML.

- JSONP output support is currently incomplete.

- TODO: support reading of POSTed Array data (currently only Objects
work).

- We're missing a good number of convenience functions.

- Add client API for setting cookies. Currently they can be fetched
or removed but not explicitly set.


Other potential TODOs:

- Session support using session cookies for the IDs. For this to work
we also need to add a storage back-end or two (files, db (e.g. using
cpdo), etc.) and have a fast, good source of random numbers for
generating UUIDs. It _seems_ that using the address of (extern char **
environ) as a seed might be fairly random, but there are probably
environments where that won't suffice. i want to avoid
platform-specific bits, like /dev/urandom, if possible.

- Add client-definable i/o routines. We have this code in the whprintf
tree, but i was hoping to avoid having to import that here. This would
allow a client to add, e.g., gzip support.

*/

/** @page page_cson_cgi_session cson CGI Sessions

cson_cgi_init() will initialize a persistent session if it can figure
out everything it needs in order to do so. If it cannot it will simply
skip session initialization. A client can tell if a session was
established or not by calling cson_cgi_get_env_val(cx,'s',0).  If that
returns NULL then no session was created during initialization.
The API currently provides no way to initialize one after the fact.
That is, client code can use cson_cgi_get_env_val(cx,'s',1) to create a
session object, but it won't automatically be persistent across
application sessions.

Session management is really just the following:

- Load a JSON object from some persistent storage.
- Save that object at shutdown.

"Persistent storage" is the important phrase here. How the sessions
are saved is really unimportant. The library uses a generic interface
(cson_sessmgr) to handle the i/o, and can use any implementation we
care to provide. As of this writing (20110413) files, sqlite3, and
MySQL5 are supported.

The session object is a JSON object available via cson_cgi_getenv(),
using "s" as the environment name (the second parameter to
cson_cgi_getenv()).

At library shutdown (typically when main() exits, but also via
cson_cgi_cx_clean()), the session is saved using the current
session manager. If the session is not loaded during initialization,
but is created later, the library will assign a new session ID to it
before saving.

See cson_cgi_config_file() for examples of configuring the session
management.
*/


#if defined(__cplusplus)
extern "C" {
#endif

    /** @def CSON_CGI_ENABLE_POST_FORM_URLENCODED

    If CSON_CGI_ENABLE_POST_FORM_URLENCODED is set to a true value
    then the API will try to process form-urlencoded POST data,
    otherwise it will not.

    Reminder to self: this is basically a quick hack for fossil
    integration. We disable form encoding in that build because fossil
    handles that itself and we must not interfere with it.
    */
#if !defined(CSON_CGI_ENABLE_POST_FORM_URLENCODED)
#define CSON_CGI_ENABLE_POST_FORM_URLENCODED 0
#endif    
    /** @def CSON_CGI_GETENV_DEFAULT

        The default environment name(s) to use for cson_cgi_getenv().
    */
#define CSON_CGI_GETENV_DEFAULT "gpce"
    /** @def CSON_CGI_KEY_JSONP

        TODO?: get rid of this and move cson_cgi_keys into the public
        API?

        The default environment key name to use for checking whether a
        response should used JSONP or not.
    */
#define CSON_CGI_KEY_JSONP "jspon"

#define CSON_CGI_KEY_SESSION "CSONSESSID"


    typedef struct cson_cgi_init_opt cson_cgi_init_opt;
    /** @struct cson_cgi_init_opt

        A type to hold core runtime configuration information for
        cson_cgi.
    */
    struct cson_cgi_init_opt
    {
        /**
           stdin stream. If NULL, stdin is used.
        */
        FILE * inStream;
        /**
           stdout stream. If NULL, stdout is used.
        */
        FILE * outStream;
        /**
           stderr stream. If NULL, stderr is used.
         */
        FILE * errStream;
        /**
           Path to a JSON config file.
         */
        char const * configFile;

        /**
           If set then the session will be forced to use this
           ID, otherwise one will be generated.
        */
        char const * sessionID;

        /**
           Values are interpretted as:

           0 = do not output headers when cson_cgi_response_output_all()
           is called.

           (>0) = always output headers when cson_cgi_response_output_all()
           is called.

           (<0) = Try to determine, based on environment variables, if
           we are running in CGI mode. If so, output the headers when
           cson_cgi_response_output_all() is called, otherwise omit
           them.

           If the headers are omitted then so is the empty line
           which normally separates them from the response body!

           The intention of this flag is to allow non-CGI apps
           to disable output of the HTTP headers.
        */
        char httpHeadersMode;
        
        /**
           JSON output options.
        */
        cson_output_opt outOpt;

    };

    /** Empty-initialized cson_cgi_init_opt object. */
#define cson_cgi_init_opt_empty_m {                             \
        NULL/*inStream*/, NULL/*outStream*/, NULL/*errStream*/, \
            NULL /*configFile*/, NULL /*sessionID*/,            \
            -1/*httpHeadersMode*/,                              \
            cson_output_opt_empty_m /*outOpt*/                  \
    }

    /** Empty-initialized cson_cgi_init_opt object. */
    extern const cson_cgi_init_opt cson_cgi_init_opt_empty;


    /** @struct cson_cgi_env_map
       Holds a cson_object and its cson_value parent
       reference.
    */
    struct cson_cgi_env_map
    {
        /** Parent reference of jobj. */
        cson_value * jval;
        /** Object reference of jval. */
        cson_object * jobj;
    };
    typedef struct cson_cgi_env_map cson_cgi_env_map;

    /** Empty cson_cgi_env_map object. */
#define cson_cgi_env_map_empty_m { NULL, NULL }

    /** @struct cson_cgi_cx

       Internal state used by cson_cgi.

       Clients must not rely on its internal structure. It is in the
       public API so that it can be stack- or custom-allocated.  To
       properly initialize such an object, use cson_cgi_cx_empty_m
       cson_cgi_cx_empty, depending on the context.
    */
    struct cson_cgi_cx
    {
        /**
           Various key/value stores used by the framework. Each
           corresponds to some convention source of key/value
           pairs, e.g. QUERY_STRING or POST parameters.
        */
        struct {
            /**
               The system's environment variables.
            */
            cson_cgi_env_map env;
            /**
               Holds QUERY_STRING key/value pairs.
            */
            cson_cgi_env_map get;
            /**
               Holds POST form/JSON data key/value pairs.
            */
            cson_cgi_env_map post;
            /**
               Holds cookie key/value pairs.
            */
            cson_cgi_env_map cookie;
            /**
               Holds request headers.
            */
            cson_cgi_env_map headers;
        } request;
        /**
           Holds data related to the response JSON.
        */
        struct {
            /**
               HTTP error code to report.
            */
            int httpCode;

            /**
               Root JSON object. Must be an Object or Array (per the JSON
               spec).
            */
            cson_value * root;
            /**
               Holds HTTP response headers as an array of key/value
               pairs.
            */
            cson_cgi_env_map headers;
        } response;
        /**
           A place to store cson_value references
           for cleanup purposes.
        */
        cson_cgi_env_map gc;
        /**
           Holds client-defined key/value pairs.
        */
        cson_cgi_env_map clientEnv;
        cson_cgi_env_map config;
        struct {
            cson_cgi_env_map env;
            cson_sessmgr * mgr;
            char * id;
        } session;
        struct {
            cson_array * jarr;
            cson_value * jval;
        } argv;

        cson_cgi_init_opt opt;
        cson_buffer tmpBuf;
        struct {
            char isJSONP;
            void const * allocStamp;
        } misc;
    };
    typedef struct cson_cgi_cx cson_cgi_cx;
    /**
       Empty-initialized cson_cgi_cx object.
     */
    extern const cson_cgi_cx cson_cgi_cx_empty;
    /**
       Empty-initialized cson_cgi_cx object.
     */
#define cson_cgi_cx_empty_m \
    { \
    { /*maps*/ \
        cson_cgi_env_map_empty_m /*env*/, \
        cson_cgi_env_map_empty_m /*get*/, \
        cson_cgi_env_map_empty_m /*post*/, \
        cson_cgi_env_map_empty_m /*cookie*/, \
        cson_cgi_env_map_empty_m /*headers*/ \
    }, \
    {/*response*/ \
        0 /*httpCode*/, \
        NULL /*root*/, \
        cson_cgi_env_map_empty_m /*headers*/ \
    }, \
    cson_cgi_env_map_empty_m /*gc*/, \
    cson_cgi_env_map_empty_m /*clientEnv*/, \
    cson_cgi_env_map_empty_m /*config*/, \
    {/*session*/ \
        cson_cgi_env_map_empty_m /*env*/, \
        NULL /*mgr*/, \
        NULL /*id*/ \
    }, \
    {/*argv*/ \
        NULL /*jarr*/, \
        NULL /*jval*/ \
    }, \
    cson_cgi_init_opt_empty_m /*opt*/, \
    cson_buffer_empty_m /* tmpBuf */, \
    {/*misc*/ \
        -1 /*isJSONP*/,                         \
            NULL/*allocStamp*/ \
    } \
    }

    cson_cgi_cx * cson_cgi_cx_alloc();
    /**
       Cleans up all internal state of cx. IFF cx was allocated by
       cson_cgi_cx_alloc() then cx is also free()d, else it is assumed
       to have been allocated by the caller (possibly on the stack).

       Returns 1 if cx is not NULL and this function actually frees
       it.  If it returns 0 then either cx is NULL or this function
       cleaned up its internals but did not free(cx) (cx is assumed to
       have been allocated by the client).
    */
    char cson_cgi_cx_clean(cson_cgi_cx * cx);
    
    /**
       Initializes the internal cson_cgi environment and must be
       called one time, from main(), at application startup.

       cx must be either:

       - Created via cson_cgi_cx_alloc().

       - Alternately allocated (e.g. on the stack) and initialized
       by copying cson_cgi_cx_empty over it.

       Any other initialization leads to undefined behaviour.
       
       Returns 0 on success. On error the problem is almost certainly
       an allocation error. If it returns non-0 then the rest of the
       API will not work (and using the rest of the API invokes
       undefined behaviour unless documented otherwise for a specific
       function), so the application should exit immediately with an
       error code. The error codes returned by this function all come
       from the cson_rc object.

       The returned object must eventually be passed to
       cson_cgi_cx_clean(), regardless of success or failure, to clean
       up any resources allocated for the object.

       On success:

       - 0 is returned.

       - The cx object takes over ownership of any streams set in the
       opt object UNLESS they are the stdin/stdout/stderr streams (in
       which case ownership does not change).

       On error non-0 is returned and ownership of the opt.xxStream
       STILL transfers over to cx as described above (because this
       simpifies client-side error handling ).
       
       The 'opt' parameter can be used to tweak certain properties
       of the framework. It may be NULL, in which case defaults are
       used.
       
       This function currently performs the following initialization:

       - Parses QUERY_STRING environment variable into a JSON object.

       - Parses the HTTP_COOKIE environment variable into a JSON object.
       
       - Transforms the system environment to JSON.

       - Copies the list of arguments (argv, in the form conventional
       for main()) to JSON array form for downstream use by the client
       application. It does not interpret these arguments in any
       way. Clients may use cson_cgi_argv() and
       cson_cgi_argv_array() to fetch the list later on in the
       application's lifetime (presumably outside of main()). It is
       legal to pass (argv==NULL) only if argc is 0 or less.

       - If the CONTENT_TYPE env var is one of (application/json,
       application/javascript, or text/plain) and CONTENT_LENGTH is
       set then stdin is assumed to be JSON data coming in via POST.
       An error during that parsing is ignored for initialization purposes
       unless it is an allocation error, in which case it is propagated
       back to the caller of this function.

       - If the CSON_CGI_CONFIG env var is set then that file is read.
       Errors in loading the config are silently ignored.

       - If session management is properly configured in the
       configuration file and if a variable named CSON_CGI_KEY_SESSION
       is found in the environment (cookies, GET, POST, or system env)
       then the previous session is loaded. If it cannot be loaded,
       the error is ignored. (Note that the cookie name can be
       changed via the configuration file.)

       TODOs:

       - Add config file option to the opt object.
       
       - Only read POST data when REQUEST_METHOD==POST?
       
       - Convert form-urlencoded POST data to a JSON object.

       - Potentially add an option to do automatic data type detection
       for numeric GET/POST/ENV/COOKIE data, such that fetching the
       cson_value for such a key would return a numeric value object
       as opposed to a string. Or we could add that option in a
       separate function which walks a JSON Object and performs that
       check/transformation on all of its entries. That currently
       can't be done properly with the cson_object_iterator API
       because changes to the object while looping invalidate the
       iterator. This option would also open up problems when clients
       pass huge strings which just happen to look like numbers.


       @see cson_cgi_config_file()
    */
    int cson_cgi_init( cson_cgi_cx * cx, int argc, char const * const * argv, cson_cgi_init_opt * options );

    /**
       Searches for a value from the CGI environment. The fromWhere
       parameter is a NUL-terminated string which specifies which
       environment(s) to check, and may be made up of any of the
       letters [gprecl], case-insensitive. If fromWhere is NULL or its
       first byte is NUL (i.e. it is empty) then the default value
       defined in CSON_CGI_GETENV_DEFAULT is used.

       The environments are searched in the order specified in
       fromWhere. The various letters mean:

       - g = GET: key/value pairs parsed from the QUERY_STRING
       environment variable.

       - p = POST: form-encoded key/value pairs parsed from stdin.

       - r = REQUEST, equivalent to "gpc", a superset of GET/POST/COOKIE.

       - e = ENV, e.g. via getenv(), but see cson_cgi_env_get_val()
       for more details.

       - c = COOKIE: request cookies (not response cookies) parsed
       from the HTTP_COOKIE environment variable.

       - a = APP: an environment namespace reserved for client app use.

       - f = CONFIG FILE.

       - Use key 's' for the SESSION.
       
       Invalid characters are ignored.

       The returned value is owned by the cson_cgi environment and
       must not be destroyed by the caller. NULL is returned if none
       of the requested environments contain the given key.

       Results are undefined if fromWhere is not NULL and is not
       NUL-terminated.

       TODOs:

       - Replace CSON_CGI_GETENV_DEFAULT with a runtime-configurable
       value (via a config file).

    */
    cson_value * cson_cgi_getenv( cson_cgi_cx * cx, char const * fromWhere, char const * key );

    /**
       A convenience form of cson_cgi_getenv() which returns the given
       key as a string. This will return NULL if the requested key
       is-not-a string value. It does not convert non-string values to
       strings.

       On success the string value is returned. Its bytes are owned by
       this API and are valid until the given key is removed/replaced
       from/in the environment object it was found in or that
       environment object is cleaned up.
    */
    char const * cson_cgi_getenv_cstr( cson_cgi_cx * cx, char const * where, char const * key );

    /**
       During initialization, if the PATH_INFO environment variable is set,
       it is split on '/' characters into array. That array is stored in the
       environment with the name PATH_INFO_SPLIT. This function returns the
       element of the PATH_INFO at the given index, or NULL if ndx is out
       of bounds or if no PATH_INFO is available.

       e.g. if PATH_INFO=/a/b/c, passing 0 to this function would return
       "a", passing 2 would return "c", and passing anything greater than 2
       would return NULL.
    */
    char const * cson_cgi_path_part_cstr( cson_cgi_cx * cx, unsigned short ndx );

    /**
       Functionally equivalent to cson_cgi_path_part_cstr(), but
       returns the underlying value as a cson value handle. That handle
       is owned by the underlying PATH_INFO_SPLIT array (which is
       owned by the "e" environment object).

       Unless the client has mucked with the PATH_INFO_SPLIT data, the
       returned value will (if it is not NULL) have a logical type of
       String.
    */
    cson_value * cson_cgi_path_part( cson_cgi_cx * cx, unsigned short ndx );
    
    /**
       Sets or unsets a key in the "user" environment/namespace. If v is NULL
       then the value is removed, otherwise it is set/replaced.

       Returns 0 on success. If key is NULL or has a length of 0 then
       cson_rc.ArgError is returned.

       The user namespace object can be fetched via
       cson_cgi_env_get_val('a',...).

       On success ownership of v is transfered to (or shared with) the
       cson_cgi API. On error ownership of v is not modified. Aside from
    */
    int cson_cgi_setenv( cson_cgi_cx * cx, char const * key, cson_value * v );

    /**
       This function is not implemented, but exists as a convenient
       place to document the cson_cgi config file format.
       
       cson_cgi_init() accepts the name of a configuration file
       (assumed to be in JSON format) to read during
       initialization. The library optionally uses the configuration
       to change certain aspects of its behaviour.

       The following commented JSON demonstrates the configuration
       file options:

       @code
       {
       "formatting": { // NOT YET HONORED. Will mimic cson_output_opt.
           "indentation": 1,
           "addNewline": true,
           "addSpaceAfterColon": true,
           "indentSingleMemberValues": true
       },
       "session": { // Options for session handling
           "manager": "file", // name of session manager impl. Should
                              // have a matching entry in "managers" (below)
           "cookieLifetimeMinutes": 10080, // cookie lifetime in minutes
           "cookieName": "cson_session_id", // cookie name for session ID
           "managers": {
               "file": {
                   "sessionDriver": "file", -- cson_cgi-internal session manager name
                   "dir": "./SESSIONS",
                   "prefix": "cson-session-",
                   "suffix": ".json"
               },
               "mysql5": {
                   "sessionDriver": "cpdo", -- cson_cgi-internal session manager name
                   "dsn": "mysql5:dbname=cpdo;host=localhost",
                   "user": "cpdo",
                   "password": "cpdo",
                   "table": "cson_session",
                   "fieldId": "id",
                   "fieldTimestamp": "last_saved",
                   "fieldSession": "json"
               },
               "sqlite3": {
                   "sessionDriver": "cpdo", -- cson_cgi-internal session manager name
                   "dsn": "sqlite3:sessions.sqlite3",
                   "user": null,
                   "password": null,
                   "table": "cson_session",
                   "fieldId": "id",
                   "fieldTimestamp": "last_saved",
                   "fieldSession": "json"
               }
           }
       }
       }
       @endcode

       TODO: allow initialization to take a JSON object, as opposed to
       a filename, so that we can embed the configuration inside client-side
       config data.
    */
    void cson_cgi_config_file();

    /**
       Sets or (if v is NULL) unsets a cookie value.

       v must either be of one of the types (string, integer, double,
       bool, null, NULL) or must be an object with the following
       structure:

       @code
       {
           value: (string, integer, double, bool, or null),
           OPTIONAL path: string,
           OPTIONAL domain: string,
           OPTIONAL expires: integer (Unix epoch timestamp),
           OPTIONAL secure: bool,
           OPTIONAL httponly: bool
       }
       @endcode

       For the object form, if the "value" property is missing or not of
       the correct type then the cookie will not be emitted in the
       HTTP response headers. The other properties are optional. A value
       of NULL or cson_value_null() will cause the expiry field (if set)
       to be ignored. Note, however, that removal will only work
       on the client side if all other cookie parameters match
       (e.g. domain and path).

       Returns 0 on success, non-0 on error.

       A duplicate cookie replaces any previous cookie with the same
       key.
       
       On success ownership of v is shared with the cson_cgi API (via
       reference counting). On error ownership of v is not modified.
    */
    int cson_cgi_cookie_set( cson_cgi_cx * cx, char const * key, cson_value * v );

    /**
       Sets or (if v is NULL) unsets an HTTP cookie value. key may not
       be NULL nor have a length of 0. v must be one of the types
       (string, integer, double, bool, null, NULL). Any other pointer
       arguments may be NULL, in which case they are not used.
       If v is NULL then the JSON null value is used as a placeholder
       value so that when the HTTP headers are generated, the cookie
       can be unset on the client side.

       This function creates an object with the structure documented
       in cson_cgi_cookie_set() and then passes that object to
       cson_cgi_cookie_set(). Any parameters which have NULL/0 values
       are not emitted in the generated object, with the exception of
       (v==NULL), which causes the expiry property to be ignored and a
       value from a time far in the past to be used (so that the
       client will expire it)..

       Returns 0 on success, non-0 on error.

       On success ownership of v is shared with the cson_cgi API (via
       reference counting). On error ownership of v is not modified.
    */
    int cson_cgi_cookie_set2( cson_cgi_cx * cx, char const * key, cson_value * v,
                              char const * domain, char const * path,
                              unsigned int expires, char secure, char httponly );
    
    /**
        Returns the internal "environment" JSON object corresponding
        to the given 'which' letter, which must be one of
        (case-insensitive):

        - g = GET
        - p = POST
        - c = COOKIE
        - e = ENV (i.e. system environment)
        - s = SESSION
        - a = APP (application-specific)

        TODO: s = SESSION

        See cson_cgi_getenv() for more details about each of those.

        Returns NULL if 'which' is not one of the above.

        Note that in the 'e' (system environment) case, making
        modifications to the returned object will NOT also modify the
        system environment.  Likewise, future updates to the system
        environment will not be automatically reflected in the
        returned object.

        The returned object is owned by the cson_cgi environment and
        must not be destroyed by the caller.

        If createIfNeeded is non-0 (true) then the requested
        environment object is created if it was formerly empty. In that
        case, a return value of NULL can indicate an invalid 'which'
        parameter or an allocation error.       

        To get the Object reference to this environment use
        cson_cgi_env_get_obj() or pass the result of this function
        to cson_value_get_object().
 
        The returned value is owned by the cson_cgi API.

        The public API does not provide a way for clients to modify
        several of the internal environment stores, e.g. HTTP GET
        parameters are set only by this framework. However, clients
        can (if needed) get around this by fetching the associated
        "environment object" via this function or
        cson_cgi_env_get_obj(), and modifying it directly. Clients are
        encouraged to use the other public APIs for dealing with the
        environment, however, and are encouraged to not directly modify
        "special" namespaces like the cookie/GET/POST data.        
    */
    cson_value * cson_cgi_env_get_val( cson_cgi_cx * cx, char which, char createIfNeeded );

    /**
       Equivalent to:

       @code
       cson_value_get_object( cson_cgi_env_get_val( which, createIfNeeded ) );
       @endcode

       Note, however, that it is at least theoretically possible that
       cson_cgi_env_get_val() return non-NULL but this function
       returns NULL. If that happens it means that the value returned
       by cson_cgi_env_get_val() is-not-a Object instance, but is
       something else (maybe an array?).
    */
    cson_object * cson_cgi_env_get_obj( cson_cgi_cx * cx, char which, char createIfNeeded );

    /**
       Adds the given key/value to the list of HTTP headers (replacing
       any existing entry with the same name).  If v is NULL then any
       header with the given key is removed from the pending response.

       Returns 0 on success. On success ownership of v is transfered
       to (or shared with) the internal header list. On error,
       ownership of v is not modified.

       If v is not of one of the types (string, integer, double, bool,
       undef, null) then the header will not be output when when
       cson_cgi_response_output_headers() is called. If it is one of
       those types then its stringified value will be its "natural"
       form (for strings and numbers), the integer 0 or 1 for
       booleans, and the number 0 for null.  Note that a literal
       (v==NULL) is treated differently from a JSON null - it UNSETS
       the given header.

       This function should not be used for setting cookies, as they
       require extra url-encoding and possibly additional
       parameters. Use cson_cgi_cookie_set() and
       cson_cgi_cookie_set2() to set cookie headers.
    */
    int cson_cgi_response_header_add( cson_cgi_cx * cx, char const * key, cson_value * v );

    /**
       Returns a cson array value containing the arguments passed
       to cson_cgi_init(). The returned value is owned by the cson_cgi
       API and must not be destroyed by the caller.

       Only returns NULL if initialization of cson_cgi_init() fails
       early on, and is almost certainly indicative of an allocation
       error. If cson_cgi_init() is given a 0-length argument list
       then this function will return an empty array (except in the
       NULL case mentioned above).
    */
    cson_value * cson_cgi_argv(cson_cgi_cx * cx);
    
    /**
       Equivalent to:

       @code
       cson_value_get_array( cson_cgi_argv() );
       @endcode
    */
    cson_array * cson_cgi_argv_array(cson_cgi_cx * cx);

    /**
       Flushes all response headers set via cson_cgi_response_header_add()
       to stdout. The client must output an empty line before the body
       part (if any), and may output custom headers before doing so.

       Do not call this more than once.
    */
    int cson_cgi_response_output_headers(cson_cgi_cx * cx);

    /**
       Outputs the response root object to stdout. If none has been
       set, non-0 is returned.

       Returns 0 on success. On error, partial output might be
       generated.

       Do not call this more than once.
    */
    int cson_cgi_response_output_root(cson_cgi_cx * cx);

    /**
       Outputs the whole response, including headers and the root JSON
       value.

       Returns 0 on success. Fails without side effects if
       no root is set.

       Do not call this more than once.
    */
    int cson_cgi_response_output_all(cson_cgi_cx * cx);
    
    /**
       Don't use this - i need to re-think the JSONP bits.
    
       Returns non-0 (true) if the GET/POST environment contains a key
       named CSON_CGI_KEY_JSONP. If this is the case, then when
       cson_cgi_response_output_headers() is called the Content-type
       is set to "application/javascript".

       If cson_cgi_enable_jsonp() is ever called to set this option
       explicitly, this function does not guess, but uses that value
       instead.

       When JSONP is desired, the generated page output must be
       wrapped in the appropriate JS code.
    */
    char cson_cgi_is_jsonp(cson_cgi_cx * cx);

    /**
       Don't use this - i need to re-think the JSONP bits.

       Sets or unsets JSONP mode. If b is 0 then JSONP guessing is
       explicitly disabled and output is assumed to be JSON. If it is
       non-0 then cson_cgi_guess_content_type() will never return
       "application/javascript".

       When JSONP is desired, the generated page output must be
       wrapped in the appropriate JS code.
    */
    void cson_cgi_enable_jsonp( cson_cgi_cx * cx, char b );

    /**
       Tries to guess the "best" Content-type header value for
       the current session, based on several factors:

       - If the GET/POST data contains a variable named
       CSON_CGI_KEY_JSONP then "application/javascript" is returned.

       - If the HTTP_ACCEPT environment variable is NOT set or
       contains "application/json" then "application/json [possibly
       charset info]" is returned.

       - If the HTTP_ACCEPT environment variable is set but does not
       contain "application/json" then "text/javascript" is returned.

       - If cson_cgi_enable_jsonp() is called and passed a true value,
       "application/javascript" is returned.

       
       If HTTP_ACCEPT_CHARSET is NOT set or contains "utf-8" then
       ";charset=utf-8" is included in the the returned string.
       
       The returned string is static and immutable and suitable for
       use as a Content-type header value. The string is guaranteed to
       be valid until the application exits. Multiple calls to this
       function, with different underlying environment data, can cause
       different results to be returned.

       Returns NULL if it absolutely cannot figure out what to do, but
       currently it has no such logic paths.
    */
    char const * cson_cgi_guess_content_type(cson_cgi_cx * cx);

    /**
       Sets the response content root, replacing any
       existing one (and possibly cleaning it up).

       Returns 0 on success. On success, ownership of v
       is transfered to (or shared with) the cson_cgi
       API. It will be cleaned up at app shutdown time
       or if it is subsequently replaced and has no
       other open references to it.

       On error ownership of v is not modified and any previous
       root is not removed.

       If v is-not-a Object or Array, nor NULL, then cson_rc.TypeError
       is returned. JSON requires either an object or array for the
       root node. Passing NULL will possibly free up any current root
       (depending on its reference count).
    */
    int cson_cgi_response_root_set( cson_cgi_cx * cx, cson_value * v );

    /**
       Fetches the current content root JSON value, as set via
       cson_cgi_response_root_set() or (if no root has been set), as
       defined by createMode, as described below.

       If a content root has been set (or previously initialized)
       then the value of createMode is ignored. If no root has been
       set then this function might try to create one, as described
       here:

       (createMode==0) means not to create a root element if none
       exists already.

       (createMode<0) means to create the root as an Array value.

       (createMode>0) means to create the root as an Object value.

       Returns NULL on allocation error or if no root has been set and
       (createMode==0). On success the returned value is guaranteed to
       be either an Array or Object (see cson_value_get_object() and
       cson_value_get_array()) and it is owned by the cson_cgi API (so
       it must not be destroyed by the caller). If the client needs to
       destroy it, pass NULL to cson_cgi_response_root_set().
    */
    cson_value * cson_cgi_response_root_get( cson_cgi_cx * cx, char createMode );
    
    /**
       Returns the current session ID. If session management is not
       enabled then NULL is returned.

       The returned bytes are owned by the cson_cgi API and are valid
       until the library is cleaned up (via cson_cgi_cleanup_lib() or
       via the normal shutdown process) or the session ID is
       re-generated for some reason. It is best not to hold a
       reference to this, but to copy it if it will be needed later.

       If the return value is not NULL, it is guaranteed to be
       NUL-terminated.
    */
    char const * cson_cgi_session_id(cson_cgi_cx *);

    /**
       Writes a 36-byte (plus one NUL byte) random UUID value to
       dest. dest must be at least 37 bytes long. If dest is NULL this
       function has no side effects.

       This function uses internal RNG state and is not thread-safe.
    */
    void cson_cgi_generate_uuid( cson_cgi_cx * cx, char * dest );

    /**
       Adds v to the API-internal cleanup mechanism. key must be a
       unique key for the given element. Adding another item with that
       key may free the previous one. If freeOnError is true then v is
       passed to cson_value_free() if the key cannot be inserted,
       otherweise ownership of v is not changed on error.

       Returns 0 on success.

       On success, ownership of v is transfered to (or shared with)
       cx, and v will be valid until cx is cleaned up or its key is
       replaced via another call to this function.
    */
    int cson_cgi_gc_add( cson_cgi_cx * cx, char const * key, cson_value * v, char freeOnError );
    
    /* LICENSE

This software's source code, including accompanying documentation and
demonstration applications, are licensed under the following
conditions...

Certain files are imported from external projects and have their own
licensing terms. Namely, the JSON_parser.* files. See their files for
their official licenses, but the summary is "do what you want [with
them] but leave the license text and copyright in place."

The author (Stephan G. Beal [http://wanderinghorse.net/home/stephan/])
explicitly disclaims copyright in all jurisdictions which recognize
such a disclaimer. In such jurisdictions, this software is released
into the Public Domain.

In jurisdictions which do not recognize Public Domain property
(e.g. Germany as of 2011), this software is Copyright (c) 2011 by
Stephan G. Beal, and is released under the terms of the MIT License
(see below).

In jurisdictions which recognize Public Domain property, the user of
this software may choose to accept it either as 1) Public Domain, 2)
under the conditions of the MIT License (see below), or 3) under the
terms of dual Public Domain/MIT License conditions described here, as
they choose.

The MIT License is about as close to Public Domain as a license can
get, and is described in clear, concise terms at:

    http://en.wikipedia.org/wiki/MIT_License

The full text of the MIT License follows:

--
Copyright (c) 2011 Stephan G. Beal (http://wanderinghorse.net/home/stephan/)

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

--END OF MIT LICENSE--

For purposes of the above license, the term "Software" includes
documentation and demonstration source code which accompanies
this software. ("Accompanies" = is contained in the Software's
primary public source code repository.)

*/

#if defined(__cplusplus)
} /*extern "C"*/
#endif

#endif /* WANDERINGHORSE_NET_CSON_CGI_H_INCLUDED */
/* end file include/wh/cson/cson_cgi.h */

Changes to src/db.c.

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/*
** Call this routine when a database error occurs.
*/
static void db_err(const char *zFormat, ...){
  va_list ap;
  char *z;

  static const char zRebuildMsg[] = 
      "If you have recently updated your fossil executable, you might\n"
      "need to run \"fossil all rebuild\" to bring the repository\n"
      "schemas up to date.\n";
  va_start(ap, zFormat);
  z = vmprintf(zFormat, ap);
  va_end(ap);






  if( g.xferPanic ){
    cgi_reset_content();
    @ error Database\serror:\s%F(z)
    cgi_reply();
  }
  if( g.cgiOutput ){
    g.cgiOutput = 0;
    cgi_printf("<h1>Database Error</h1>\n"
               "<pre>%h</pre><p>%s</p>", z, zRebuildMsg);
    cgi_reply();
  }else{
    fprintf(stderr, "%s: %s\n\n%s", fossil_nameofexe(), z, zRebuildMsg);
  }


  db_force_rollback();
  fossil_exit(1);
}

static int nBegin = 0;      /* Nesting depth of BEGIN */
static int doRollback = 0;  /* True to force a rollback */
static int nCommitHook = 0; /* Number of commit hooks */
static struct sCommitHook {
  int (*xHook)(void);  /* Functions to call at db_end_transaction() */







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/*
** Call this routine when a database error occurs.
*/
static void db_err(const char *zFormat, ...){
  va_list ap;
  char *z;
  int rc = 1;
  static const char zRebuildMsg[] = 
      "If you have recently updated your fossil executable, you might\n"
      "need to run \"fossil all rebuild\" to bring the repository\n"
      "schemas up to date.\n";
  va_start(ap, zFormat);
  z = vmprintf(zFormat, ap);
  va_end(ap);
  if( g.json.isJsonMode ){
    json_err( 0, z, 1 );
    if( g.isCGI ){
      rc = 0 /* avoid HTTP 500 */;
    }
  }else{
    if( g.xferPanic ){
      cgi_reset_content();
      @ error Database\serror:\s%F(z)
      cgi_reply();
    }
    if( g.cgiOutput ){
      g.cgiOutput = 0;
      cgi_printf("<h1>Database Error</h1>\n"
                 "<pre>%h</pre><p>%s</p>", z, zRebuildMsg);
      cgi_reply();
    }else{
      fprintf(stderr, "%s: %s\n\n%s", fossil_nameofexe(), z, zRebuildMsg);
    }
  }
  free(z);
  db_force_rollback();
  fossil_exit(rc);
}

static int nBegin = 0;      /* Nesting depth of BEGIN */
static int doRollback = 0;  /* True to force a rollback */
static int nCommitHook = 0; /* Number of commit hooks */
static struct sCommitHook {
  int (*xHook)(void);  /* Functions to call at db_end_transaction() */

Added src/json.c.







































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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/*
** Copyright (c) 2007 D. Richard Hipp
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the Simplified BSD License (also
** known as the "2-Clause License" or "FreeBSD License".)

** This program is distributed in the hope that it will be useful,
** but without any warranty; without even the implied warranty of
** merchantability or fitness for a particular purpose.
**
** Author contact information:
**   drh@hwaci.com
**   http://www.hwaci.com/drh/
**
*******************************************************************************
**  
** Code for the JSON/REST API.
**
** For notes regarding the public JSON interface, please see:
**
** https://docs.google.com/document/d/1fXViveNhDbiXgCuE7QDXQOKeFzf2qNUkBEgiUvoqFN4/edit
**
*/
#include "config.h"
#include "VERSION.h"
#include "json.h"
#include <assert.h>
#include <time.h>

#if INTERFACE
#include "cson_amalgamation.h"
/*
** The "official" list of Fossil/JSON error codes.
** Their values might very well change during initial
** development but after their first public release
** they must stay stable.
** Values must be in the range 1..9999
**
** Numbers evenly dividable by 100 are "categories",
** and error codes for a given category have their
** high bits set to the category value.
**
*/
enum FossilJsonCodes {

FSL_JSON_E_GENERIC = 1000,
FSL_JSON_E_INVALID_REQUEST = FSL_JSON_E_GENERIC + 1,
FSL_JSON_E_UNKNOWN_COMMAND = FSL_JSON_E_GENERIC + 2,
FSL_JSON_E_UNKNOWN = FSL_JSON_E_GENERIC + 3,
FSL_JSON_E_RESOURCE_NOT_FOUND = FSL_JSON_E_GENERIC + 4,
FSL_JSON_E_TIMEOUT = FSL_JSON_E_GENERIC + 5,
FSL_JSON_E_ASSERT = FSL_JSON_E_GENERIC + 6,
FSL_JSON_E_ALLOC = FSL_JSON_E_GENERIC + 7,
FSL_JSON_E_NYI = FSL_JSON_E_GENERIC + 8,

FSL_JSON_E_AUTH = 2000,
FSL_JSON_E_LOGIN_FAILED = FSL_JSON_E_AUTH + 1,
FSL_JSON_E_MISSING_AUTH = FSL_JSON_E_AUTH + 2,
FSL_JSON_E_DENIED = FSL_JSON_E_AUTH + 3,
FSL_JSON_E_WRONG_MODE = FSL_JSON_E_AUTH + 4,


FSL_JSON_E_USAGE = 3000,
FSL_JSON_E_INVALID_ARGS = FSL_JSON_E_USAGE + 1,
FSL_JSON_E_MISSING_ARGS = FSL_JSON_E_USAGE + 2,

FSL_JSON_E_DB = 4000,
FSL_JSON_E_STMT_PREP = FSL_JSON_E_DB + 1,
FSL_JSON_E_STMT_BIND = FSL_JSON_E_DB + 2,
FSL_JSON_E_STMT_EXEC = FSL_JSON_E_DB + 3,
FSL_JSON_E_DB_LOCKED = FSL_JSON_E_DB + 4,
};
#endif

/*
** Holds keys used for various JSON API properties.
*/
static const struct FossilJsonKeys_{
  char const * authToken;
} FossilJsonKeys = {
  "authToken"  /*authToken*/
};

/*
** Given a FossilJsonCodes value, it returns a string suitable for use
** as a resultText string. Returns some unspecified string if errCode
** is not one of the FossilJsonCodes values.
*/
char const * json_err_str( int errCode ){
  switch( errCode ){
    case 0: return "Success";
#define C(X,V) case FSL_JSON_E_ ## X: return V

    C(GENERIC,"Generic error");
    C(INVALID_REQUEST,"Invalid request");
    C(UNKNOWN_COMMAND,"Unknown Command");
    C(UNKNOWN,"Unknown error");
    C(RESOURCE_NOT_FOUND,"Resource not found");
    C(TIMEOUT,"Timeout reached");
    C(ASSERT,"Assertion failed");
    C(ALLOC,"Resource allocation failed");
    C(NYI,"Not yet implemented.");
    C(AUTH,"Authentication error");
    C(LOGIN_FAILED,"Login failed");
    C(MISSING_AUTH,"Authentication info missing from request");
    C(DENIED,"Access denied");
    C(WRONG_MODE,"Request not allowed (wrong operation mode)");

    C(USAGE,"Usage error");
    C(INVALID_ARGS,"Invalid arguments");
    C(MISSING_ARGS,"Missing arguments");

    C(DB,"Database error");
    C(STMT_PREP,"Statement preparation failed");
    C(STMT_BIND,"Statement parameter binding failed");
    C(STMT_EXEC,"Statement execution/stepping failed");
    C(DB_LOCKED,"Database is locked");
#undef C
    default:
      return "Unknown Error";
  }
}
/*
** Implements the cson_data_dest_f() interface and outputs the data to
** a fossil Blob object.  pState must be-a initialized (Blob*), to
** which n bytes of src will be appended.
**/
int cson_data_dest_Blob(void * pState, void const * src, unsigned int n){
  Blob * b = (Blob*)pState;
  blob_append( b, (char const *)src, (int)n ) /* will die on OOM */;
  return 0;
}

/*
** Implements the cson_data_source_f() interface and reads
** input from a fossil Blob object. pState must be-a (Blob*).
*/
int cson_data_src_Blob(void * pState, void * dest, unsigned int * n){
  Blob * b = (Blob*)pState;
  *n = blob_read( b, dest, *n );
  return 0;
}

/*
** Convenience wrapper around cson_output() which appends the output
** to pDest. pOpt may be NULL, in which case g.json.outOpt will be used.
*/
int cson_output_Blob( cson_value const * pVal, Blob * pDest, cson_output_opt const * pOpt ){
  return cson_output( pVal, cson_data_dest_Blob,
                      pDest, pOpt ? pOpt : &g.json.outOpt );
}

/*
** Convenience wrapper around cson_parse() which reads its input
** from pSrc. pSrc is rewound before parsing.
**
** pInfo may be NULL. If it is not NULL then it will contain details
** about the parse state when this function returns.
**
** On success a new JSON Object or Array is returned. On error NULL is
** returned.
*/
cson_value * cson_parse_Blob( Blob * pSrc, cson_parse_info * pInfo ){
  cson_value * root = NULL;
  blob_rewind( pSrc );
  cson_parse( &root, cson_data_src_Blob, pSrc, NULL, pInfo );
  return root;
}

/*
** Returns a string in the form FOSSIL-XXXX, where XXXX is a
** left-zero-padded value of code. The returned buffer is static, and
** must be copied if needed for later.  The returned value will always
** be 11 bytes long (not including the trailing NUL byte).
**
** In practice we will only ever call this one time per app execution
** when constructing the JSON response envelope, so the static buffer
** "shouldn't" be a problem.
**
*/
char const * json_rc_cstr( int code ){
  enum { BufSize = 12 };
  static char buf[BufSize] = {'F','O','S','S','I','L','-',0};
  sprintf(buf+7,"%04d", code);
  return buf;
}

/*
** Returns the value of json_rc_cstr(code) as a new JSON
** string, which is owned by the caller and must eventually
** be cson_value_free()d or transfered to a JSON container.
*/
cson_value * json_rc_string( int code ){
  return cson_value_new_string( json_rc_cstr(code), 11 );
}

/*
** UNTESTED!!!
**
** Returns the current request's JSON authentication token, or NULL if
** none is found. The token's memory is owned by (or shared with)
** g.json.cgiCx.
**
** If an auth token is found in the GET/POST JSON request data then
** fossil is given that data for use in authentication for this
** session.
**
** Must be called once before login_check_credentials() is called or
** we will not be able to replace fossil's internal idea of the auth
** info in time (and future changes to that state may cause unexpected
** results).
**
** The result of this call are cached for future calls.
*/
static cson_value * json_auth_token(){
  if( !g.json.authToken ){
    /* Try to get an authorization token from GET parameter, POSTed
       JSON, or fossil cookie (in that order). */
    g.json.authToken = cson_cgi_getenv(&g.json.cgiCx, "gp", FossilJsonKeys.authToken)
      /* reminder to self: cson_cgi does not have access to the cookies
         because fossil's core consumes them. Thus we cannot use "gpc"
         here.
      */;
    if( g.json.authToken){
      /* tell fossil to use this login info.
         
         FIXME: because the JSON bits don't carry around login_cookie_name(),
         there is a login hijacking window here. We need to change the
         JSON auth token to be in the form: login_cookie_name()=...
      */
      cgi_replace_parameter( login_cookie_name(), cson_value_get_cstr(g.json.authToken) );
    }
    else if( g.isCGI ){
      /* try fossil's conventional cookie. */
      /* Reminder: chicken/egg scenario regarding db access in CLI
         mode because login_cookie_name() needs the db. */
      char const * zCookie = P(login_cookie_name());
      if( zCookie && *zCookie ){
        /* Transfer fossil's cookie to JSON for downstream convenience... */
        cson_value * v = cson_value_new_string(zCookie, strlen(zCookie));
        if( 0 == cson_cgi_gc_add( &g.json.cgiCx, FossilJsonKeys.authToken, v, 1 ) ){
          g.json.authToken = v;
        }
      }
    }
  }
  return g.json.authToken;
}

/*
** Performs some common initialization of JSON-related state.
** Implicitly sets up the login information state in CGI mode,
** but does not perform any authentication here. It _might_
** (haven't tested this) die with an error if an auth cookie
** is malformed.
*/
static void json_mode_bootstrap(){
  g.json.isJsonMode = 1;
  g.json.resultCode = 0;
#if defined(NDEBUG)
  /* avoids debug messages on stderr in JSON mode */
  sqlite3_config(SQLITE_CONFIG_LOG, NULL, 0);
#endif
  g.json.reqPayload.v = cson_cgi_getenv( &g.json.cgiCx, "p", "payload" );
  if( g.json.reqPayload.v ){
    g.json.reqPayload.o = cson_value_get_object( g.json.reqPayload.v );
    if( ! g.json.reqPayload.o ){/* POST data is an array, which we can't use. */
      assert( cson_value_is_array( g.json.reqPayload.v ) );
      g.json.reqPayload.v = NULL;
    }
  }
  json_auth_token()/* will copy our auth token, if any, to fossil's core. */;
  if( g.isCGI ){
    login_check_credentials();
  }
  else{
    db_find_and_open_repository(OPEN_ANY_SCHEMA,0);
  }
}

/*
** If g.json.reqPayload.o is NULL then NULL is returned, else the
** given property is searched for in the request payload.  If found it
** is returned. The returned value is owned by (or shares ownership
** with) g.json.cgiCx, and must NOT be cson_value_free()'d by the
** caller.
*/
static cson_value * json_payload_property( char const * key ){
  return g.json.reqPayload.o ?
    cson_object_get( g.json.reqPayload.o, key )
    : NULL;
}


/* Returns the C-string form of json_auth_token(), or NULL
** if json_auth_token() returns NULL.
*/
char const * json_auth_token_cstr() {
  return cson_value_get_cstr( json_auth_token() );
}

/*
** Holds name-to-function mappings for JSON page/command dispatching.
**
*/
typedef struct JsonPageDef{
  /*
  ** The commmand/page's name (path, not including leading /json/).
  **
  ** Reminder to self: we cannot use sub-paths with commands this way
  ** without additional string-splitting downstream. e.g. foo/bar.
  ** Alternately, we can create different JsonPageDef arrays for each
  ** subset.
  */
  char const * name;
  /*
  ** Returns a payload object for the response.
  ** If it returns a non-NULL value, the caller owns it.
  */
  cson_value * (*func)();
  /*
  ** Which mode(s) of execution does func() support:
  **
  ** <0 = CLI only, >0 = HTTP only, 0==both
  */
  char runMode;
} JsonPageDef;

/*
** Returns the JsonPageDef with the given name, or NULL if no match is
** found.
**
** head must be a pointer to an array of JsonPageDefs in which the
** last entry has a NULL name.
*/
static JsonPageDef const * json_handler_for_name( char const * name, JsonPageDef const * head ){
  JsonPageDef const * pageDef = head;
  assert( head != NULL );
  if(name && *name) for( ; pageDef->name; ++pageDef ){
    if( 0 == strcmp(name, pageDef->name) ){
      return pageDef;
    }
  }
  return NULL;
}

/*
** Given a Fossil/JSON result code, this function "dumbs it down"
** according to the current value of g.json.errorDetailParanoia. The
** dumbed-down value is returned.
**
** This function assert()s that code is either 0
** or between the range of 1000 and 9999.
*/
static int json_dumbdown_rc( int code ){
  if( !code ){
    return 0;
  }else{
    int modulo = 0;
    assert((code >= 1000) && (code <= 9999) && "Invalid Fossil/JSON code.");
    switch( g.json.errorDetailParanoia ){
      case 1: modulo = 10; break;
      case 2: modulo = 100; break;
      case 3: modulo = 1000; break;
      default: break;
    }
    if( modulo ) code = code - (code % modulo);
    return code;
  }
}

/*
** Creates a new Fossil/REST response envelope skeleton.  It is owned
** by the caller, who must eventually free it using cson_value_free(),
** or add it to a cson container to transfer ownership. Returns NULL
** on error.
**
** If payload is not NULL and resultCode is 0 then it is set as the
** "payload" property of the returned object. If resultCode is non-0
** then this function will destroy payload if it is not NULL.
**
** pMsg is an optional message string (resultText) property of the
** response. If resultCode is non-0 and pMsg is NULL then
** json_err_str() is used to get the error string. The caller may
** provide his own or may use an empty string to suppress the
** resultText property.
**
** If resultCode is non-zero and payload is not NULL then this
** function calls cson_value_free(payload) and does not insert the
** payload into the response.
**
*/
cson_value * json_response_skeleton( int resultCode,
                                     cson_value * payload,
                                     char const * pMsg ){
  cson_value * v = NULL;
  cson_value * tmp = NULL;
  cson_object * o = NULL;
  int rc;
  resultCode = json_dumbdown_rc(resultCode);
  v = cson_value_new_object();
  o = cson_value_get_object(v);
  if( ! o ) return NULL;
#define SET(K) if(!tmp) goto cleanup; \
  rc = cson_object_set( o, K, tmp ); \
  if(rc) do{\
    cson_value_free(tmp); \
    tmp = NULL; \
    goto cleanup; \
  }while(0)

  tmp = cson_value_new_string(MANIFEST_UUID,strlen(MANIFEST_UUID));
  SET("fossil");
 
  {/* "timestamp" */
    time_t const t = (time_t)g.now;
    struct tm gt = *gmtime(&t);
    cson_int_t jsTime = (cson_int_t)mktime(&gt);
    tmp = cson_value_new_integer(jsTime);
    SET("timestamp");
  }
  if( 0 != resultCode ){
    if( ! pMsg ) pMsg = json_err_str(resultCode);
    tmp = json_rc_string(resultCode);
    SET("resultCode");
  }
  if( pMsg && *pMsg ){
    tmp = cson_value_new_string(pMsg,strlen(pMsg));
    SET("resultText");
  }
  tmp = cson_cgi_getenv(&g.json.cgiCx, "gp", "requestId");
  if( tmp ) cson_object_set( o, "requestId", tmp );
  if( NULL != payload ){
    if( resultCode ){
      cson_value_free(payload);
      payload = NULL;
    }else{
      tmp = payload;
      SET("payload");
    }
  }
#undef SET
  goto ok;
  cleanup:
  cson_value_free(v);
  v = NULL;
  ok:
  return v;
}

/*
** Outputs a JSON error response to g.httpOut.  If rc is 0 then
** g.json.resultCode is used. If that is also 0 then the "Unknown
** Error" code is used.
**
** If g.isCGI then the generated error object replaces any currently
** buffered page output.
**
** If alsoOutput is true AND g.isCGI then the cgi_reply() is called to
** flush the output (and headers). Generally only do this if you are about
** to call exit().
**
** !g.isCGI then alsoOutput is ignored and all output is sent to
** stdout immediately.
**
** This clears any previously buffered CGI content, replacing it with
** JSON.
*/
void json_err( int code, char const * msg, char alsoOutput ){
  int rc = code ? code : (g.json.resultCode
                          ? g.json.resultCode
                          : FSL_JSON_E_UNKNOWN);
  cson_value * resp = NULL;
  rc = json_dumbdown_rc(rc);
  if( rc && !msg ){
    msg = json_err_str(rc);
  }
  resp = json_response_skeleton(rc, NULL, msg);
  if( g.isCGI ){
    Blob buf = empty_blob;
    cgi_reset_content();
    cson_output_Blob( resp, &buf, &g.json.outOpt );
    cgi_set_content(&buf);
    if( alsoOutput ){
      cgi_reply();
    }
  }else{
    cson_output_FILE( resp, stdout, &g.json.outOpt );
  }
  cson_value_free(resp);
}

/*
** /json/version implementation.
**
** Returns the payload object (owned by the caller).
*/
cson_value * json_page_version(void){
  cson_value * jval = NULL;
  cson_object * jobj = NULL;
  jval = cson_value_new_object();
  jobj = cson_value_get_object(jval);
#define FSET(X,K) cson_object_set( jobj, K, cson_value_new_string(X,strlen(X)))
  FSET(MANIFEST_UUID,"manifestUuid");
  FSET(MANIFEST_VERSION,"manifestVersion");
  FSET(MANIFEST_DATE,"manifestDate");
  FSET(MANIFEST_YEAR,"manifestYear");
  FSET(RELEASE_VERSION,"releaseVersion");
#undef FSET
  cson_object_set( jobj, "releaseVersionNumber",
                   cson_value_new_integer(RELEASE_VERSION_NUMBER) );
  return jval;
}

static cson_value * json_getenv( char const *zWhichEnv, char const * zKey ){
  return cson_cgi_getenv(&g.json.cgiCx, zWhichEnv, zKey);
}
static char const * json_getenv_cstr( char const *zWhichEnv, char const * zKey ){
  return cson_value_get_cstr( json_getenv(zWhichEnv, zKey) );
}

/*
** Implementation for /json/cap
**
** Returned object contains details about the "capabilities" of the
** current user (what he may/may not do).
**
** This is primarily intended for debuggering, but may have
** a use in client code. (?)
*/
cson_value * json_page_cap(void){
  cson_value * payload = cson_value_new_object();
  cson_object * obj = cson_value_get_object(payload);
#define ADD(X) cson_object_set(obj, #X, cson_value_new_bool(g.perm.X))
  ADD(Setup);
  ADD(Admin);
  ADD(Delete);
  ADD(Password);
  ADD(Query);
  ADD(Write);
  ADD(Read);
  ADD(History);
  ADD(Clone);
  ADD(RdWiki);
  ADD(NewWiki);
  ADD(ApndWiki);
  ADD(WrWiki);
  ADD(RdTkt);
  ADD(NewTkt);
  ADD(ApndTkt);
  ADD(WrTkt);
  ADD(Attach);
  ADD(TktFmt);
  ADD(RdAddr);
  ADD(Zip);
  ADD(Private);
#undef ADD
  return payload;
}

/*
** Implementation of the /json/login page.
**
** NOT YET FINSIHED!
** TODOs:
**
** - anonymous user login (requires separate handling
** due to random password).
**
** - more testing
*/
cson_value * json_page_login(void){
  char const * name = cson_value_get_cstr(json_payload_property("name"));
  char const * pw;
  cson_value * payload = NULL;
  /*cson_object * pObj;*/
  int uid = 0;
  /*return cson_cgi_env_get_val(&g.json.cgiCx,'g',0);*/
  
  if( !name ){
    name = json_getenv_cstr( "g", "name" )
      /* When i use P("n") i'm not getting the result i expect! */
      ;
    if( !name ){
      name = json_getenv_cstr( "g", "n" );
    }
  }
  if( !name ){
    g.json.resultCode = FSL_JSON_E_LOGIN_FAILED;
    return NULL;
  }

  pw = cson_value_get_cstr(json_payload_property("password"));
  if( !pw ){
    pw = json_getenv_cstr( "g", "password" );
    if( !pw ){
      pw = json_getenv_cstr( "g", "p" );
    }
  }

  if(!pw){
    g.json.resultCode = FSL_JSON_E_LOGIN_FAILED;
  }else{
    uid = login_search_uid( name, pw );
  }
  if( !uid ){
    g.json.resultCode = FSL_JSON_E_LOGIN_FAILED;
  }else{
    char * cookie = NULL;
    login_set_user_cookie(name, uid, &cookie);
    payload = cson_value_new_string( cookie, strlen(cookie) );
    free(cookie);
  }
  return payload;
}

/*
** Implementation of the /json/stat page/command.
**
*/
cson_value * json_page_stat(void){
  i64 t, fsize;
  int n, m;
  const char *zDb;
  enum { BufLen = 200 };
  char zBuf[BufLen];
  cson_value * jv = NULL;
  cson_object * jo = NULL;
  cson_value * jv2 = NULL;
  cson_object * jo2 = NULL;
#if 0 /* FIXME: credentials */
  login_check_credentials();
  if( !g.okRead ){ login_needed(); return NULL; }
#endif
#define SETBUF(O,K) cson_object_set(O, K, cson_value_new_string(zBuf, strlen(zBuf)));

  jv = cson_value_new_object();
  jo = cson_value_get_object(jv);

  sqlite3_snprintf(BufLen, zBuf, db_get("project-name",""));
  SETBUF(jo, "projectName");
  /* FIXME: don't include project-description until we ensure that
     zBuf will always be big enough. We "should" replace zBuf
     with a blob for this purpose.
  */
  fsize = file_size(g.zRepositoryName);
  cson_object_set(jo, "repositorySize", cson_value_new_integer((cson_int_t)fsize));

  n = db_int(0, "SELECT count(*) FROM blob");
  m = db_int(0, "SELECT count(*) FROM delta");
  cson_object_set(jo, "blobCount", cson_value_new_integer((cson_int_t)n));
  cson_object_set(jo, "deltaCount", cson_value_new_integer((cson_int_t)m));
  if( n>0 ){
    int a, b;
    Stmt q;
    db_prepare(&q, "SELECT total(size), avg(size), max(size)"
                   " FROM blob WHERE size>0");
    db_step(&q);
    t = db_column_int64(&q, 0);
    cson_object_set(jo, "uncompressedArtifactSize",
                    cson_value_new_integer((cson_int_t)t));
    cson_object_set(jo, "averageArtifactSize",
                    cson_value_new_integer((cson_int_t)db_column_int(&q, 1)));
    cson_object_set(jo, "maxArtifactSize",
                    cson_value_new_integer((cson_int_t)db_column_int(&q, 2)));
    db_finalize(&q);
    if( t/fsize < 5 ){
      b = 10;
      fsize /= 10;
    }else{
      b = 1;
    }
    a = t/fsize;
    sqlite3_snprintf(BufLen,zBuf, "%d:%d", a, b);
    SETBUF(jo, "compressionRatio");
  }
  n = db_int(0, "SELECT count(distinct mid) FROM mlink /*scan*/");
  cson_object_set(jo, "checkinCount", cson_value_new_integer((cson_int_t)n));
  n = db_int(0, "SELECT count(*) FROM filename /*scan*/");
  cson_object_set(jo, "fileCount", cson_value_new_integer((cson_int_t)n));
  n = db_int(0, "SELECT count(*) FROM tag  /*scan*/"
                " WHERE +tagname GLOB 'wiki-*'");
  cson_object_set(jo, "wikiPageCount", cson_value_new_integer((cson_int_t)n));
  n = db_int(0, "SELECT count(*) FROM tag  /*scan*/"
                " WHERE +tagname GLOB 'tkt-*'");
  cson_object_set(jo, "ticketCount", cson_value_new_integer((cson_int_t)n));
  n = db_int(0, "SELECT julianday('now') - (SELECT min(mtime) FROM event)"
                " + 0.99");
  cson_object_set(jo, "ageDays", cson_value_new_integer((cson_int_t)n));
  cson_object_set(jo, "ageYears", cson_value_new_double(n/365.24));
  sqlite3_snprintf(BufLen, zBuf, db_get("project-code",""));
  SETBUF(jo, "projectCode");
  sqlite3_snprintf(BufLen, zBuf, db_get("server-code",""));
  SETBUF(jo, "serverCode");
  cson_object_set(jo, "compiler", cson_value_new_string(COMPILER_NAME, strlen(COMPILER_NAME)));

  jv2 = cson_value_new_object();
  jo2 = cson_value_get_object(jv2);
  cson_object_set(jo, "sqlite", jv2);
  sqlite3_snprintf(BufLen, zBuf, "%.19s [%.10s] (%s)",
                   SQLITE_SOURCE_ID, &SQLITE_SOURCE_ID[20], SQLITE_VERSION);
  SETBUF(jo2, "version");
  zDb = db_name("repository");
  cson_object_set(jo2, "pageCount", cson_value_new_integer((cson_int_t)db_int(0, "PRAGMA %s.page_count", zDb)));
  cson_object_set(jo2, "pageSize", cson_value_new_integer((cson_int_t)db_int(0, "PRAGMA %s.page_size", zDb)));
  cson_object_set(jo2, "freeList", cson_value_new_integer((cson_int_t)db_int(0, "PRAGMA %s.freelist_count", zDb)));
  sqlite3_snprintf(BufLen, zBuf, "%s", db_text(0, "PRAGMA %s.encoding", zDb));
  SETBUF(jo2, "encoding");
  sqlite3_snprintf(BufLen, zBuf, "%s", db_text(0, "PRAGMA %s.journal_mode", zDb));
  cson_object_set(jo2, "journalMode", *zBuf ? cson_value_new_string(zBuf, strlen(zBuf)) : cson_value_null());
  return jv;
#undef SETBUF
}

/*
** Implements the /json/wiki family of pages/commands. Far from
** complete.
**
*/
cson_value * json_page_wiki(void){
  cson_value * jlist = NULL;
  cson_value * rows = NULL;
  Stmt q;
  wiki_prepare_page_list(&q);
  cson_sqlite3_stmt_to_json( q.pStmt, &jlist, 1 );
  db_finalize(&q);
  assert( NULL != jlist );
  rows = cson_object_take( cson_value_get_object(jlist), "rows" );
  assert( NULL != rows );
  cson_value_free( jlist );
  return rows;
}

/*
** Mapping of names to JSON pages/commands.  Each name is a subpath of
** /json (in CGI mode) or a subcommand of the json command in CLI mode
*/
static const JsonPageDef JsonPageDefs[] = {
/* please keep alphabetically sorted (case-insensitive) for maintenance reasons. */
{"cap", json_page_cap, 0},
{"HAI",json_page_version,0},
{"login",json_page_login,1/*should be >0. Only 0 for dev/testing purposes.*/},
{"stat",json_page_stat,0},
{"version",json_page_version,0},
{"wiki",json_page_wiki,0},
/* Last entry MUST have a NULL name. */
{NULL,NULL}
};

/*
** WEBPAGE: /json
**
** Pages under /json/... must be entered into JsonPageDefs.
*/
void json_page_top(void){
  int rc = FSL_JSON_E_UNKNOWN_COMMAND;
  Blob buf = empty_blob;
  char const * cmd;
  cson_value * payload = NULL;
  cson_value * root = NULL;
  JsonPageDef const * pageDef = NULL;
  json_mode_bootstrap();
  cmd = cson_cgi_path_part_cstr(&g.json.cgiCx,1);
  pageDef = json_handler_for_name(cmd,&JsonPageDefs[0]);
  cgi_set_content_type( cson_cgi_guess_content_type(&g.json.cgiCx) );
  if( ! pageDef ){
    json_err( FSL_JSON_E_UNKNOWN_COMMAND, NULL, 0 );
    return;
  }else if( pageDef->runMode < 0 /*CLI only*/) {
    rc = FSL_JSON_E_WRONG_MODE;
  }else{
    rc = 0;
    payload = (*pageDef->func)();
  }
  /* FIXME: we need a way of channeling resultCode values back here. */
  if( g.json.resultCode ){
    json_err(g.json.resultCode, NULL, 0);
  }else{
    blob_zero(&buf);
    root = json_response_skeleton(rc, payload, NULL);
    cson_output_Blob( root, &buf, NULL );
    cson_value_free(root);
    cgi_set_content(&buf)/*takes ownership of the buf memory*/;
  }
}

/*
** COMMAND: json
**
** Usage: %fossil json subcommand
**
** The commands include:
**
**   stat
**   version (alias: HAI)
**
**
** TODOs:
**
**   wiki
**   timeline
**   tickets
**   ...
**
*/
void json_cmd_top(void){
  char const * cmd = NULL;
  unsigned int n;
  int rc = 1002;
  cson_value * payload = NULL;
  JsonPageDef const * pageDef;
  json_mode_bootstrap();
  db_find_and_open_repository(0, 0);
  if( g.argc<3 ){
    goto usage;
  }
  cmd = g.argv[2];
  n = cmd ? strlen(cmd) : 0;
  if( n==0 ){
    goto usage;
  }
  cgi_set_content_type( cson_cgi_guess_content_type(&g.json.cgiCx) );
  pageDef = json_handler_for_name(cmd,&JsonPageDefs[0]);
  if( ! pageDef ){
    json_err( FSL_JSON_E_UNKNOWN_COMMAND, NULL, 0 );
    return;
  }else if( pageDef->runMode > 0 /*HTTP only*/) {
    rc = FSL_JSON_E_WRONG_MODE;
  }else{
    rc = 0;
    payload = (pageDef->func)();
  }
  if( g.json.resultCode ){
    json_err(g.json.resultCode, NULL, 1);
  }else{
    payload = json_response_skeleton(rc, payload, NULL);
    cson_output_FILE( payload, stdout, &g.json.outOpt );
    cson_value_free( payload );
    if((0 != rc) && !g.isCGI){
      /* FIXME: we need a way of passing this error back
         up to the routine which called this callback.
         e.g. add g.errCode.
      */
      exit(1);
    }
  }
  return;
  usage:
  usage("subcommand");
}

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/*
** Return the name of the login cookie.
**
** The login cookie name is always of the form:  fossil-XXXXXXXXXXXXXXXX
** where the Xs are the first 16 characters of the login-group-code or
** of the project-code if we are not a member of any login-group.
*/
static char *login_cookie_name(void){
  static char *zCookieName = 0;
  if( zCookieName==0 ){
    zCookieName = db_text(0,
       "SELECT 'fossil-' || substr(value,1,16)"
       "  FROM config"
       " WHERE name IN ('project-code','login-group-code')"
       " ORDER BY name;"
................................................................................
  return mprintf("%.16s", zFullCode);
}


/*
** Check to see if the anonymous login is valid.  If it is valid, return
** the userid of the anonymous user.



*/
static int isValidAnonymousLogin(
  const char *zUsername,  /* The username.  Must be "anonymous" */
  const char *zPassword   /* The supplied password */
){
  const char *zCS;        /* The captcha seed value */
  const char *zPw;        /* The correct password shown in the captcha */
  int uid;                /* The user ID of anonymous */

  if( zUsername==0 ) return 0;
  if( zPassword==0 ) return 0;

  if( fossil_strcmp(zUsername,"anonymous")!=0 ) return 0;
  zCS = P("cs");   /* The "cs" parameter is the "captcha seed" */
  if( zCS==0 ) return 0;
  zPw = captcha_decode((unsigned int)atoi(zCS));
  if( fossil_stricmp(zPw, zPassword)!=0 ) return 0;
  uid = db_int(0, "SELECT uid FROM user WHERE login='anonymous'"
                  " AND length(pw)>0 AND length(cap)>0");
  return uid;
}

................................................................................
  create_accesslog_table();
  db_multi_exec(
    "INSERT INTO accesslog(uname,ipaddr,success,mtime)"
    "VALUES(%Q,%Q,%d,julianday('now'));",
    zUsername, zIpAddr, bSuccess
  );
}







































































































/*
** WEBPAGE: login
** WEBPAGE: logout
** WEBPAGE: my
**
** Generate the login page.
................................................................................
  char *zRemoteAddr;           /* Abbreviated IP address of requestor */

  login_check_credentials();
  zUsername = P("u");
  zPasswd = P("p");
  anonFlag = P("anon")!=0;
  if( P("out")!=0 ){
    /* To logout, change the cookie value to an empty string */
    const char *zCookieName = login_cookie_name();
    cgi_set_cookie(zCookieName, "", login_cookie_path(), -86400);
    redirect_to_g();
  }
  if( g.perm.Password && zPasswd && (zNew1 = P("n1"))!=0 && (zNew2 = P("n2"))!=0 ){
    /* The user requests a password change */
    zSha1Pw = sha1_shared_secret(zPasswd, g.zLogin, 0);
    if( db_int(1, "SELECT 0 FROM user"
                  " WHERE uid=%d AND (pw=%Q OR pw=%Q)", 
................................................................................
        redirect_to_g();
        return;
      }
    }
  }
  zIpAddr = PD("REMOTE_ADDR","nil");   /* Complete IP address for logging */
  zRemoteAddr = ipPrefix(zIpAddr);     /* Abbreviated IP address */
  uid = isValidAnonymousLogin(zUsername, zPasswd);
  if( uid>0 ){
    /* Successful login as anonymous.  Set a cookie that looks like
    ** this:
    **
    **    HASH/TIME/anonymous
    **
    ** Where HASH is the sha1sum of TIME/IPADDR/SECRET, in which IPADDR
................................................................................
    cgi_set_cookie(zCookieName, zCookie, login_cookie_path(), 6*3600);
    record_login_attempt("anonymous", zIpAddr, 1);
    redirect_to_g();
  }
  if( zUsername!=0 && zPasswd!=0 && zPasswd[0]!=0 ){
    /* Attempting to log in as a user other than anonymous.
    */
    zSha1Pw = sha1_shared_secret(zPasswd, zUsername, 0);
    uid = db_int(0,
        "SELECT uid FROM user"
        " WHERE login=%Q"
        "   AND length(cap)>0 AND length(pw)>0"
        "   AND login NOT IN ('anonymous','nobody','developer','reader')"
        "   AND (pw=%Q OR pw=%Q)",
        zUsername, zPasswd, zSha1Pw
    );
    if( uid<=0 ){
      sleep(1);
      zErrMsg = 
         @ <p><span class="loginError">
         @ You entered an unknown user or an incorrect password.
         @ </span></p>
      ;
................................................................................
      /* Non-anonymous login is successful.  Set a cookie of the form:
      **
      **    HASH/PROJECT/LOGIN
      **
      ** where HASH is a random hex number, PROJECT is either project
      ** code prefix, and LOGIN is the user name.
      */
      char *zCookie;
      const char *zCookieName = login_cookie_name();
      const char *zExpire = db_get("cookie-expire","8766");
      int expires = atoi(zExpire)*3600;
      char *zCode = abbreviated_project_code(db_get("project-code",""));
      char *zHash;
  
      zHash = db_text(0, "SELECT hex(randomblob(25))");
      zCookie = mprintf("%s/%s/%s", zHash, zCode, zUsername);
      cgi_set_cookie(zCookieName, zCookie, login_cookie_path(), expires);
      record_login_attempt(zUsername, zIpAddr, 1);
      db_multi_exec(
        "UPDATE user SET cookie=%Q, ipaddr=%Q, "
        "  cexpire=julianday('now')+%d/86400.0 WHERE uid=%d",
        zHash, zRemoteAddr, expires, uid
      );
      redirect_to_g();
    }
  }
  style_header("Login/Logout");
  @ %s(zErrMsg)
  @ <form action="login" method="post">
  if( P("g") ){
................................................................................
  fossil_free(zOtherRepo);
  return nXfer;
}

/*
** Lookup the uid for a user with zLogin and zCookie and zRemoteAddr.
** Return 0 if not found.




*/
static int login_find_user(
  const char *zLogin,            /* User name */
  const char *zCookie,           /* Login cookie value */
  const char *zRemoteAddr        /* Abbreviated IP address for valid login */
){
  int uid;







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/*
** Return the name of the login cookie.
**
** The login cookie name is always of the form:  fossil-XXXXXXXXXXXXXXXX
** where the Xs are the first 16 characters of the login-group-code or
** of the project-code if we are not a member of any login-group.
*/
char *login_cookie_name(void){
  static char *zCookieName = 0;
  if( zCookieName==0 ){
    zCookieName = db_text(0,
       "SELECT 'fossil-' || substr(value,1,16)"
       "  FROM config"
       " WHERE name IN ('project-code','login-group-code')"
       " ORDER BY name;"
................................................................................
  return mprintf("%.16s", zFullCode);
}


/*
** Check to see if the anonymous login is valid.  If it is valid, return
** the userid of the anonymous user.
**
** The zCS parameter is the "captcha seed" used for a specific
** anonymous login request.
*/
static int isValidAnonymousLogin(
  const char *zUsername,  /* The username.  Must be "anonymous" */
  const char *zPassword,  /* The supplied password */
  const char *zCS         /* The captcha seed value */
){
  const char *zPw;        /* The correct password shown in the captcha */
  int uid;                /* The user ID of anonymous */

  if( zUsername==0 ) return 0;
  else if( zPassword==0 ) return 0;
  else if( zCS==0 ) return 0;
  else if( fossil_strcmp(zUsername,"anonymous")!=0 ) return 0;


  zPw = captcha_decode((unsigned int)atoi(zCS));
  if( fossil_stricmp(zPw, zPassword)!=0 ) return 0;
  uid = db_int(0, "SELECT uid FROM user WHERE login='anonymous'"
                  " AND length(pw)>0 AND length(cap)>0");
  return uid;
}

................................................................................
  create_accesslog_table();
  db_multi_exec(
    "INSERT INTO accesslog(uname,ipaddr,success,mtime)"
    "VALUES(%Q,%Q,%d,julianday('now'));",
    zUsername, zIpAddr, bSuccess
  );
}

/*
** Searches for the user ID matching the given name and password.
** On success it returns a positive value. On error it returns 0.
** On serious (DB-level) error it will probably exit.
**
** zPassword may be either the plain-text form or the encrypted
** form of the user's password.
*/
int login_search_uid(char const *zUsername, char const *zPasswd){
  char * zSha1Pw = sha1_shared_secret(zPasswd, zUsername, 0);
  int const uid =
      db_int(0,
             "SELECT uid FROM user"
             " WHERE login=%Q"
             "   AND length(cap)>0 AND length(pw)>0"
             "   AND login NOT IN ('anonymous','nobody','developer','reader')"
             "   AND (pw=%Q OR pw=%Q)",
             zUsername, zPasswd, zSha1Pw
             );
  free(zSha1Pw);
  return uid;
}

/*
** Generates a login cookie value for a non-anonymous user.
**
** The zHash parameter must be a random value which must be
** subsequently stored in user.cookie for later validation.
**
** The returned memory should be free()d after use.
*/
char * login_gen_user_cookie_value(char const *zUsername, char const * zHash){
  char *zCode = abbreviated_project_code(db_get("project-code",""));
  assert((zUsername && *zUsername) && "Invalid user data.");
  return mprintf("%s/%z/%s", zHash, zCode, zUsername);
}

/*
** Generates a login cookie for NON-ANONYMOUS users.  Note that this
** function "could" figure out the uid by itself but it currently
** doesn't because the code which calls this already has the uid.
**
** This function also updates the user.cookie, user.ipaddr,
** and user.cexpire fields for the given user.
**
** If zDest is not NULL then the generated cookie is copied to
** *zDdest and ownership is transfered to the caller (who should
** eventually pass it to free()).
*/
void login_set_user_cookie(
  char const * zUsername, /* User's name */
  int uid,                /* User's ID */
  char ** zDest           /* Optional: store generated cookie value. */
){
  const char *zCookieName = login_cookie_name();
  const char *zExpire = db_get("cookie-expire","8766");
  int expires = atoi(zExpire)*3600;
  char *zHash;
  char *zCookie;
  char const * zIpAddr = PD("REMOTE_ADDR","nil");   /* Complete IP address for logging */
  char * zRemoteAddr = ipPrefix(zIpAddr);     /* Abbreviated IP address */
  assert((zUsername && *zUsername) && (uid > 0) && "Invalid user data.");
  zHash = db_text(0, "SELECT hex(randomblob(25))");
  zCookie = login_gen_user_cookie_value(zUsername, zHash);
  cgi_set_cookie(zCookieName, zCookie, login_cookie_path(), expires);
  record_login_attempt(zUsername, zIpAddr, 1);
  db_multi_exec(
                "UPDATE user SET cookie=%Q, ipaddr=%Q, "
                "  cexpire=julianday('now')+%d/86400.0 WHERE uid=%d",
                zHash, zRemoteAddr, expires, uid
                );
  free(zRemoteAddr);
  free(zHash);
  if( zDest ){
    *zDest = zCookie;
  }else{
    free(zCookie);
  }
}

/*
** "Unsets" the login cookie (insofar as cookies can be unset) and
** clears the current user's (g.userUid) login information from the
** user table. Sets: user.cookie, user.ipaddr, user.cexpire.
**
** We could/should arguably clear out g.userUid and g.perm here, but
** we don't currently do not.
**
** This is a no-op if g.userUid is 0.
*/
void login_clear_login_data(){
  if(!g.userUid){
    return;
  }else{
    /* To logout, change the cookie value to an empty string */
    cgi_set_cookie(login_cookie_name(), "",
                   login_cookie_path(), -86400);
    db_multi_exec("UPDATE user SET cookie=NULL, ipaddr=NULL, "
                  "  cexpire=0 WHERE uid=%d", g.userUid);
  }
}

/*
** WEBPAGE: login
** WEBPAGE: logout
** WEBPAGE: my
**
** Generate the login page.
................................................................................
  char *zRemoteAddr;           /* Abbreviated IP address of requestor */

  login_check_credentials();
  zUsername = P("u");
  zPasswd = P("p");
  anonFlag = P("anon")!=0;
  if( P("out")!=0 ){
    login_clear_login_data();


    redirect_to_g();
  }
  if( g.perm.Password && zPasswd && (zNew1 = P("n1"))!=0 && (zNew2 = P("n2"))!=0 ){
    /* The user requests a password change */
    zSha1Pw = sha1_shared_secret(zPasswd, g.zLogin, 0);
    if( db_int(1, "SELECT 0 FROM user"
                  " WHERE uid=%d AND (pw=%Q OR pw=%Q)", 
................................................................................
        redirect_to_g();
        return;
      }
    }
  }
  zIpAddr = PD("REMOTE_ADDR","nil");   /* Complete IP address for logging */
  zRemoteAddr = ipPrefix(zIpAddr);     /* Abbreviated IP address */
  uid = isValidAnonymousLogin(zUsername, zPasswd, P("cs"));
  if( uid>0 ){
    /* Successful login as anonymous.  Set a cookie that looks like
    ** this:
    **
    **    HASH/TIME/anonymous
    **
    ** Where HASH is the sha1sum of TIME/IPADDR/SECRET, in which IPADDR
................................................................................
    cgi_set_cookie(zCookieName, zCookie, login_cookie_path(), 6*3600);
    record_login_attempt("anonymous", zIpAddr, 1);
    redirect_to_g();
  }
  if( zUsername!=0 && zPasswd!=0 && zPasswd[0]!=0 ){
    /* Attempting to log in as a user other than anonymous.
    */







    uid = login_search_uid(zUsername, zPasswd);

    if( uid<=0 ){
      sleep(1);
      zErrMsg = 
         @ <p><span class="loginError">
         @ You entered an unknown user or an incorrect password.
         @ </span></p>
      ;
................................................................................
      /* Non-anonymous login is successful.  Set a cookie of the form:
      **
      **    HASH/PROJECT/LOGIN
      **
      ** where HASH is a random hex number, PROJECT is either project
      ** code prefix, and LOGIN is the user name.
      */
      login_set_user_cookie(zUsername, uid, NULL);















      redirect_to_g();
    }
  }
  style_header("Login/Logout");
  @ %s(zErrMsg)
  @ <form action="login" method="post">
  if( P("g") ){
................................................................................
  fossil_free(zOtherRepo);
  return nXfer;
}

/*
** Lookup the uid for a user with zLogin and zCookie and zRemoteAddr.
** Return 0 if not found.
**
** Note that this only searches for logged-in entries with
** matching zCookie (user.cookie) and zRemoteAddr (user.ipaddr)
** entries.
*/
static int login_find_user(
  const char *zLogin,            /* User name */
  const char *zCookie,           /* Login cookie value */
  const char *zRemoteAddr        /* Abbreviated IP address for valid login */
){
  int uid;

Changes to src/main.c.

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#include "config.h"
#include "main.h"
#include <string.h>
#include <time.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>



#if INTERFACE


/*
** Number of elements in an array
*/
#define count(X)  (sizeof(X)/sizeof(X[0]))

/*
................................................................................
  FILE *httpIn;           /* Accept HTTP input from here */
  FILE *httpOut;          /* Send HTTP output here */
  int xlinkClusterOnly;   /* Set when cloning.  Only process clusters */
  int fTimeFormat;        /* 1 for UTC.  2 for localtime.  0 not yet selected */
  int *aCommitFile;       /* Array of files to be committed */
  int markPrivate;        /* All new artifacts are private if true */
  int clockSkewSeen;      /* True if clocks on client and server out of sync */


  int urlIsFile;          /* True if a "file:" url */
  int urlIsHttps;         /* True if a "https:" url */
  int urlIsSsh;           /* True if an "ssh:" url */
  char *urlName;          /* Hostname for http: or filename for file: */
  char *urlHostname;      /* The HOST: parameter on http headers */
  char *urlProtocol;      /* "http" or "https" */
................................................................................
  char *urlPath;          /* Pathname for http: */
  char *urlUser;          /* User id for http: */
  char *urlPasswd;        /* Password for http: */
  char *urlCanonical;     /* Canonical representation of the URL */
  char *urlProxyAuth;     /* Proxy-Authorizer: string */
  char *urlFossil;        /* The path of the ?fossil=path suffix on ssh: */
  int dontKeepUrl;        /* Do not persist the URL */

  const char *zLogin;     /* Login name.  "" if not logged in. */
  const char *zSSLIdentity;  /* Value of --ssl-identity option, filename of SSL client identity */
  int useLocalauth;       /* No login required if from 127.0.0.1 */
  int noPswd;             /* Logged in without password (on 127.0.0.1) */
  int userUid;            /* Integer user id */

  /* Information used to populate the RCVFROM table */
................................................................................
  const char *azAuxName[MX_AUX]; /* Name of each aux() or option() value */
  char *azAuxParam[MX_AUX];      /* Param of each aux() or option() value */
  const char *azAuxVal[MX_AUX];  /* Value of each aux() or option() value */
  const char **azAuxOpt[MX_AUX]; /* Options of each option() value */
  int anAuxCols[MX_AUX];         /* Number of columns for option() values */
  
  int allowSymlinks;             /* Cached "allow-symlinks" option */
















};

/*
** Macro for debugging:
*/
#define CGIDEBUG(X)  if( g.fDebug ) cgi_debug X

................................................................................
  if( cnt==1 ){
    *pIndex = m;
    return 0;
  }
  return 1+(cnt>1);
}












/*
** This procedure runs first.
*/
int main(int argc, char **argv){
  const char *zCmdName = "unknown";
  int idx;
  int rc;
  int i;

  sqlite3_config(SQLITE_CONFIG_LOG, fossil_sqlite_log, 0);

  g.now = time(0);
  g.argc = argc;
  g.argv = argv;





  for(i=0; i<argc; i++) g.argv[i] = fossil_mbcs_to_utf8(argv[i]);
  if( getenv("GATEWAY_INTERFACE")!=0 && !find_option("nocgi", 0, 0)){
    zCmdName = "cgi";

  }else if( argc<2 ){
    fossil_fatal("Usage: %s COMMAND ...\n"
                 "\"%s help\" for a list of available commands\n"
                 "\"%s help COMMAND\" for specific details\n",
                 argv[0], argv[0], argv[0]);
  }else{

    g.fQuiet = find_option("quiet", 0, 0)!=0;
    g.fSqlTrace = find_option("sqltrace", 0, 0)!=0;
    g.fSqlStats = find_option("sqlstats", 0, 0)!=0;
    g.fSystemTrace = find_option("systemtrace", 0, 0)!=0;
    if( g.fSqlTrace ) g.fSqlStats = 1;
    g.fSqlPrint = find_option("sqlprint", 0, 0)!=0;
    g.fHttpTrace = find_option("httptrace", 0, 0)!=0;
................................................................................
      }
    }
    fossil_fatal("%s: ambiguous command prefix: %s\n"
                 "%s: could be any of:%s\n"
                 "%s: use \"help\" for more information\n",
                 argv[0], zCmdName, argv[0], blob_str(&couldbe), argv[0]);
  }
































  aCommand[idx].xFunc();
  fossil_exit(0);
  /*NOT_REACHED*/
  return 0;
}

/*
................................................................................
/*
** Print an error message, rollback all databases, and quit.  These
** routines never return.
*/
void fossil_panic(const char *zFormat, ...){
  char *z;
  va_list ap;

  static int once = 1;
  mainInFatalError = 1;
  va_start(ap, zFormat);
  z = vmprintf(zFormat, ap);
  va_end(ap);





  if( g.cgiOutput && once ){
    once = 0;
    cgi_printf("<p class=\"generalError\">%h</p>", z);
    cgi_reply();
  }else{
    char *zOut = mprintf("%s: %s\n", fossil_nameofexe(), z);
    fossil_puts(zOut, 1);
  }

  db_force_rollback();
  fossil_exit(1);
}

void fossil_fatal(const char *zFormat, ...){
  char *z;

  va_list ap;
  mainInFatalError = 1;
  va_start(ap, zFormat);
  z = vmprintf(zFormat, ap);
  va_end(ap);






  if( g.cgiOutput ){
    g.cgiOutput = 0;
    cgi_printf("<p class=\"generalError\">%h</p>", z);
    cgi_reply();
  }else{
    char *zOut = mprintf("\r%s: %s\n", fossil_nameofexe(), z);
    fossil_puts(zOut, 1);
  }
  db_force_rollback();
  fossil_exit(1);
}

/* This routine works like fossil_fatal() except that if called
** recursively, the recursive call is a no-op.
**
** Use this in places where an error might occur while doing
** fatal error shutdown processing.  Unlike fossil_panic() and







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#include "config.h"
#include "main.h"
#include <string.h>
#include <time.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h> /* atexit() */


#if INTERFACE
#include "cson_amalgamation.h" /* JSON API */

/*
** Number of elements in an array
*/
#define count(X)  (sizeof(X)/sizeof(X[0]))

/*
................................................................................
  FILE *httpIn;           /* Accept HTTP input from here */
  FILE *httpOut;          /* Send HTTP output here */
  int xlinkClusterOnly;   /* Set when cloning.  Only process clusters */
  int fTimeFormat;        /* 1 for UTC.  2 for localtime.  0 not yet selected */
  int *aCommitFile;       /* Array of files to be committed */
  int markPrivate;        /* All new artifacts are private if true */
  int clockSkewSeen;      /* True if clocks on client and server out of sync */
  int isCGI;              /* True if running in HTTP/CGI mode, else assume CLI. */

  int urlIsFile;          /* True if a "file:" url */
  int urlIsHttps;         /* True if a "https:" url */
  int urlIsSsh;           /* True if an "ssh:" url */
  char *urlName;          /* Hostname for http: or filename for file: */
  char *urlHostname;      /* The HOST: parameter on http headers */
  char *urlProtocol;      /* "http" or "https" */
................................................................................
  char *urlPath;          /* Pathname for http: */
  char *urlUser;          /* User id for http: */
  char *urlPasswd;        /* Password for http: */
  char *urlCanonical;     /* Canonical representation of the URL */
  char *urlProxyAuth;     /* Proxy-Authorizer: string */
  char *urlFossil;        /* The path of the ?fossil=path suffix on ssh: */
  int dontKeepUrl;        /* Do not persist the URL */
  
  const char *zLogin;     /* Login name.  "" if not logged in. */
  const char *zSSLIdentity;  /* Value of --ssl-identity option, filename of SSL client identity */
  int useLocalauth;       /* No login required if from 127.0.0.1 */
  int noPswd;             /* Logged in without password (on 127.0.0.1) */
  int userUid;            /* Integer user id */

  /* Information used to populate the RCVFROM table */
................................................................................
  const char *azAuxName[MX_AUX]; /* Name of each aux() or option() value */
  char *azAuxParam[MX_AUX];      /* Param of each aux() or option() value */
  const char *azAuxVal[MX_AUX];  /* Value of each aux() or option() value */
  const char **azAuxOpt[MX_AUX]; /* Options of each option() value */
  int anAuxCols[MX_AUX];         /* Number of columns for option() values */
  
  int allowSymlinks;             /* Cached "allow-symlinks" option */

  struct FossilJsonBits {
    int isJsonMode;            /* True if running in JSON mode, else false. This changes
                                  how errors are reported. In JSON mode we try to always
                                  output JSON-form error responses.
                               */
    int resultCode;            /* used for passing back specific codes from /json callbacks. */
    int errorDetailParanoia;   /* 0=full error codes, 1=%10, 2=%100, 3=%1000 */
    cson_cgi_cx cgiCx;         /* cson_cgi context */
    cson_output_opt outOpt;    /* formatting options for JSON mode. */
    cson_value * authToken;    /* authentication token */
    struct {
      cson_value * v;
      cson_object * o;
    } reqPayload;              /* request payload object (if any) */
  } json;
};

/*
** Macro for debugging:
*/
#define CGIDEBUG(X)  if( g.fDebug ) cgi_debug X

................................................................................
  if( cnt==1 ){
    *pIndex = m;
    return 0;
  }
  return 1+(cnt>1);
}

/*
** atexit() handler which frees up "some" of the resources
** used by fossil.
*/
void fossil_atexit() {
  cson_cgi_cx_clean(&g.json.cgiCx);
  if(g.db){
    db_close(0);
  }
}

/*
** This procedure runs first.
*/
int main(int argc, char **argv){
  const char *zCmdName = "unknown";
  int idx;
  int rc;
  int i;

  sqlite3_config(SQLITE_CONFIG_LOG, fossil_sqlite_log, 0);
  memset(&g, 0, sizeof(g));
  g.now = time(0);
  g.argc = argc;
  g.argv = argv;
  g.json.errorDetailParanoia = 0 /* FIXME: make configurable */;
  g.json.cgiCx = cson_cgi_cx_empty;
  g.json.outOpt = cson_output_opt_empty;
  g.json.outOpt.addNewline = 1;
  g.json.outOpt.indentation = 1 /* FIXME: make configurable */;
  for(i=0; i<argc; i++) g.argv[i] = fossil_mbcs_to_utf8(argv[i]);
  if( getenv("GATEWAY_INTERFACE")!=0 && !find_option("nocgi", 0, 0)){
    zCmdName = "cgi";
    g.isCGI = 1;
  }else if( argc<2 ){
    fossil_fatal("Usage: %s COMMAND ...\n"
                 "\"%s help\" for a list of available commands\n"
                 "\"%s help COMMAND\" for specific details\n",
                 argv[0], argv[0], argv[0]);
  }else{
    g.isCGI = 0;
    g.fQuiet = find_option("quiet", 0, 0)!=0;
    g.fSqlTrace = find_option("sqltrace", 0, 0)!=0;
    g.fSqlStats = find_option("sqlstats", 0, 0)!=0;
    g.fSystemTrace = find_option("systemtrace", 0, 0)!=0;
    if( g.fSqlTrace ) g.fSqlStats = 1;
    g.fSqlPrint = find_option("sqlprint", 0, 0)!=0;
    g.fHttpTrace = find_option("httptrace", 0, 0)!=0;
................................................................................
      }
    }
    fossil_fatal("%s: ambiguous command prefix: %s\n"
                 "%s: could be any of:%s\n"
                 "%s: use \"help\" for more information\n",
                 argv[0], zCmdName, argv[0], blob_str(&couldbe), argv[0]);
  }
  rc = cson_cgi_init(&g.json.cgiCx, g.argc, (char const * const *)g.argv, NULL)
    /* Reminder: cson_cgi_init() may process the POST data before
       fossil gets to, but it is configured to only read
       application/[json/javascript] and text/plain. form-urlencoded
       and x-fossil-* data will be consumed by fossil's cgi_init().

       Note that we set up the CGI bits even when not running in CGI
       mode because some of cson_cgi's facilities are useful in
       non-CGI contexts and we use those in the CLI variants of the
       JSON commands.

       FIXME: do some analysis of the request path (HTTP mode) or
       CLI args (CLI mode) and only call this if the command is
       a JSON-mode command. We can only do that easily from here
       if we use e.g. /json/foo instead of /foo.json, since we
       have a common prefix.
     */
    ;
  if(rc){
    fossil_fatal("%s: unrecoverable error while initializing JSON CGI bits: "
                 "cson error code #%d (%s)\n",
                 argv[0], rc, cson_rc_string(rc));
  }else{
    if( NULL != cson_cgi_env_get_obj( &g.json.cgiCx, 'p', 0 ) ){
      /* if cson_cgi read the POST data then we're certainly in JSON
         mode. If it didn't then we have to delay this decision until
         the JSON family of callbacks is called.
      */
      g.json.isJsonMode = 1;
    }
    atexit( fossil_atexit );
  }
  aCommand[idx].xFunc();
  fossil_exit(0);
  /*NOT_REACHED*/
  return 0;
}

/*
................................................................................
/*
** Print an error message, rollback all databases, and quit.  These
** routines never return.
*/
void fossil_panic(const char *zFormat, ...){
  char *z;
  va_list ap;
  int rc = 1;
  static int once = 1;
  mainInFatalError = 1;
  va_start(ap, zFormat);
  z = vmprintf(zFormat, ap);
  va_end(ap);
  if( g.json.isJsonMode ){
    json_err( 0, z, 1 );
    if( g.isCGI ){
      rc = 0 /* avoid HTTP 500 */;
    }
  }else if( g.cgiOutput && once ){
    once = 0;
    cgi_printf("<p class=\"generalError\">%h</p>", z);
    cgi_reply();
  }else{
    char *zOut = mprintf("%s: %s\n", fossil_nameofexe(), z);
    fossil_puts(zOut, 1);
  }
  free(z);
  db_force_rollback();
  fossil_exit(rc);
}

void fossil_fatal(const char *zFormat, ...){
  char *z;
  int rc = 1;
  va_list ap;
  mainInFatalError = 1;
  va_start(ap, zFormat);
  z = vmprintf(zFormat, ap);
  va_end(ap);
  if( g.json.isJsonMode ){
    json_err( 0, z, 1 );
    if( g.isCGI ){
      rc = 0 /* avoid HTTP 500 */;
    }
  }
  else if( g.cgiOutput ){
    g.cgiOutput = 0;
    cgi_printf("<p class=\"generalError\">%h</p>", z);
    cgi_reply();
  }else{
    char *zOut = mprintf("\r%s: %s\n", fossil_nameofexe(), z);
    fossil_puts(zOut, 1);
  }
  db_force_rollback();
  fossil_exit(rc);
}

/* This routine works like fossil_fatal() except that if called
** recursively, the recursive call is a no-op.
**
** Use this in places where an error might occur while doing
** fatal error shutdown processing.  Unlike fossil_panic() and

Changes to src/main.mk.

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  $(SRCDIR)/gzip.c \
  $(SRCDIR)/http.c \
  $(SRCDIR)/http_socket.c \
  $(SRCDIR)/http_ssl.c \
  $(SRCDIR)/http_transport.c \
  $(SRCDIR)/import.c \
  $(SRCDIR)/info.c \

  $(SRCDIR)/leaf.c \
  $(SRCDIR)/login.c \
  $(SRCDIR)/main.c \
  $(SRCDIR)/manifest.c \
  $(SRCDIR)/md5.c \
  $(SRCDIR)/merge.c \
  $(SRCDIR)/merge3.c \
................................................................................
  $(OBJDIR)/gzip_.c \
  $(OBJDIR)/http_.c \
  $(OBJDIR)/http_socket_.c \
  $(OBJDIR)/http_ssl_.c \
  $(OBJDIR)/http_transport_.c \
  $(OBJDIR)/import_.c \
  $(OBJDIR)/info_.c \

  $(OBJDIR)/leaf_.c \
  $(OBJDIR)/login_.c \
  $(OBJDIR)/main_.c \
  $(OBJDIR)/manifest_.c \
  $(OBJDIR)/md5_.c \
  $(OBJDIR)/merge_.c \
  $(OBJDIR)/merge3_.c \
................................................................................
 $(OBJDIR)/gzip.o \
 $(OBJDIR)/http.o \
 $(OBJDIR)/http_socket.o \
 $(OBJDIR)/http_ssl.o \
 $(OBJDIR)/http_transport.o \
 $(OBJDIR)/import.o \
 $(OBJDIR)/info.o \

 $(OBJDIR)/leaf.o \
 $(OBJDIR)/login.o \
 $(OBJDIR)/main.o \
 $(OBJDIR)/manifest.o \
 $(OBJDIR)/md5.o \
 $(OBJDIR)/merge.o \
 $(OBJDIR)/merge3.o \
................................................................................
# to 1. If it is set to 1, then there is no need to build or link
# the sqlite3.o object. Instead, the system sqlite will be linked
# using -lsqlite3.
SQLITE3_OBJ.1 = 
SQLITE3_OBJ.0 = $(OBJDIR)/sqlite3.o
SQLITE3_OBJ.  = $(SQLITE3_OBJ.0)

EXTRAOBJ =  $(SQLITE3_OBJ.$(USE_SYSTEM_SQLITE))  $(OBJDIR)/shell.o  $(OBJDIR)/th.o  $(OBJDIR)/th_lang.o

$(APPNAME):	$(OBJDIR)/headers $(OBJ) $(EXTRAOBJ)
	$(TCC) -o $(APPNAME) $(OBJ) $(EXTRAOBJ) $(LIB)

# This rule prevents make from using its default rules to try build
# an executable named "manifest" out of the file named "manifest.c"
#
................................................................................
clean:	
	rm -rf $(OBJDIR)/* $(APPNAME)


$(OBJDIR)/page_index.h: $(TRANS_SRC) $(OBJDIR)/mkindex
	$(OBJDIR)/mkindex $(TRANS_SRC) >$@
$(OBJDIR)/headers:	$(OBJDIR)/page_index.h $(OBJDIR)/makeheaders $(OBJDIR)/VERSION.h
	$(OBJDIR)/makeheaders  $(OBJDIR)/add_.c:$(OBJDIR)/add.h $(OBJDIR)/allrepo_.c:$(OBJDIR)/allrepo.h $(OBJDIR)/attach_.c:$(OBJDIR)/attach.h $(OBJDIR)/bag_.c:$(OBJDIR)/bag.h $(OBJDIR)/bisect_.c:$(OBJDIR)/bisect.h $(OBJDIR)/blob_.c:$(OBJDIR)/blob.h $(OBJDIR)/branch_.c:$(OBJDIR)/branch.h $(OBJDIR)/browse_.c:$(OBJDIR)/browse.h $(OBJDIR)/captcha_.c:$(OBJDIR)/captcha.h $(OBJDIR)/cgi_.c:$(OBJDIR)/cgi.h $(OBJDIR)/checkin_.c:$(OBJDIR)/checkin.h $(OBJDIR)/checkout_.c:$(OBJDIR)/checkout.h $(OBJDIR)/clearsign_.c:$(OBJDIR)/clearsign.h $(OBJDIR)/clone_.c:$(OBJDIR)/clone.h $(OBJDIR)/comformat_.c:$(OBJDIR)/comformat.h $(OBJDIR)/configure_.c:$(OBJDIR)/configure.h $(OBJDIR)/content_.c:$(OBJDIR)/content.h $(OBJDIR)/db_.c:$(OBJDIR)/db.h $(OBJDIR)/delta_.c:$(OBJDIR)/delta.h $(OBJDIR)/deltacmd_.c:$(OBJDIR)/deltacmd.h $(OBJDIR)/descendants_.c:$(OBJDIR)/descendants.h $(OBJDIR)/diff_.c:$(OBJDIR)/diff.h $(OBJDIR)/diffcmd_.c:$(OBJDIR)/diffcmd.h $(OBJDIR)/doc_.c:$(OBJDIR)/doc.h $(OBJDIR)/encode_.c:$(OBJDIR)/encode.h $(OBJDIR)/event_.c:$(OBJDIR)/event.h $(OBJDIR)/export_.c:$(OBJDIR)/export.h $(OBJDIR)/file_.c:$(OBJDIR)/file.h $(OBJDIR)/finfo_.c:$(OBJDIR)/finfo.h $(OBJDIR)/glob_.c:$(OBJDIR)/glob.h $(OBJDIR)/graph_.c:$(OBJDIR)/graph.h $(OBJDIR)/gzip_.c:$(OBJDIR)/gzip.h $(OBJDIR)/http_.c:$(OBJDIR)/http.h $(OBJDIR)/http_socket_.c:$(OBJDIR)/http_socket.h $(OBJDIR)/http_ssl_.c:$(OBJDIR)/http_ssl.h $(OBJDIR)/http_transport_.c:$(OBJDIR)/http_transport.h $(OBJDIR)/import_.c:$(OBJDIR)/import.h $(OBJDIR)/info_.c:$(OBJDIR)/info.h $(OBJDIR)/leaf_.c:$(OBJDIR)/leaf.h $(OBJDIR)/login_.c:$(OBJDIR)/login.h $(OBJDIR)/main_.c:$(OBJDIR)/main.h $(OBJDIR)/manifest_.c:$(OBJDIR)/manifest.h $(OBJDIR)/md5_.c:$(OBJDIR)/md5.h $(OBJDIR)/merge_.c:$(OBJDIR)/merge.h $(OBJDIR)/merge3_.c:$(OBJDIR)/merge3.h $(OBJDIR)/name_.c:$(OBJDIR)/name.h $(OBJDIR)/path_.c:$(OBJDIR)/path.h $(OBJDIR)/pivot_.c:$(OBJDIR)/pivot.h $(OBJDIR)/popen_.c:$(OBJDIR)/popen.h $(OBJDIR)/pqueue_.c:$(OBJDIR)/pqueue.h $(OBJDIR)/printf_.c:$(OBJDIR)/printf.h $(OBJDIR)/rebuild_.c:$(OBJDIR)/rebuild.h $(OBJDIR)/report_.c:$(OBJDIR)/report.h $(OBJDIR)/rss_.c:$(OBJDIR)/rss.h $(OBJDIR)/schema_.c:$(OBJDIR)/schema.h $(OBJDIR)/search_.c:$(OBJDIR)/search.h $(OBJDIR)/setup_.c:$(OBJDIR)/setup.h $(OBJDIR)/sha1_.c:$(OBJDIR)/sha1.h $(OBJDIR)/shun_.c:$(OBJDIR)/shun.h $(OBJDIR)/skins_.c:$(OBJDIR)/skins.h $(OBJDIR)/sqlcmd_.c:$(OBJDIR)/sqlcmd.h $(OBJDIR)/stash_.c:$(OBJDIR)/stash.h $(OBJDIR)/stat_.c:$(OBJDIR)/stat.h $(OBJDIR)/style_.c:$(OBJDIR)/style.h $(OBJDIR)/sync_.c:$(OBJDIR)/sync.h $(OBJDIR)/tag_.c:$(OBJDIR)/tag.h $(OBJDIR)/tar_.c:$(OBJDIR)/tar.h $(OBJDIR)/th_main_.c:$(OBJDIR)/th_main.h $(OBJDIR)/timeline_.c:$(OBJDIR)/timeline.h $(OBJDIR)/tkt_.c:$(OBJDIR)/tkt.h $(OBJDIR)/tktsetup_.c:$(OBJDIR)/tktsetup.h $(OBJDIR)/undo_.c:$(OBJDIR)/undo.h $(OBJDIR)/update_.c:$(OBJDIR)/update.h $(OBJDIR)/url_.c:$(OBJDIR)/url.h $(OBJDIR)/user_.c:$(OBJDIR)/user.h $(OBJDIR)/verify_.c:$(OBJDIR)/verify.h $(OBJDIR)/vfile_.c:$(OBJDIR)/vfile.h $(OBJDIR)/wiki_.c:$(OBJDIR)/wiki.h $(OBJDIR)/wikiformat_.c:$(OBJDIR)/wikiformat.h $(OBJDIR)/winhttp_.c:$(OBJDIR)/winhttp.h $(OBJDIR)/xfer_.c:$(OBJDIR)/xfer.h $(OBJDIR)/zip_.c:$(OBJDIR)/zip.h $(SRCDIR)/sqlite3.h $(SRCDIR)/th.h $(OBJDIR)/VERSION.h
	touch $(OBJDIR)/headers
$(OBJDIR)/headers: Makefile
Makefile:
$(OBJDIR)/add_.c:	$(SRCDIR)/add.c $(OBJDIR)/translate
	$(OBJDIR)/translate $(SRCDIR)/add.c >$(OBJDIR)/add_.c

$(OBJDIR)/add.o:	$(OBJDIR)/add_.c $(OBJDIR)/add.h  $(SRCDIR)/config.h
................................................................................
$(OBJDIR)/info_.c:	$(SRCDIR)/info.c $(OBJDIR)/translate
	$(OBJDIR)/translate $(SRCDIR)/info.c >$(OBJDIR)/info_.c

$(OBJDIR)/info.o:	$(OBJDIR)/info_.c $(OBJDIR)/info.h  $(SRCDIR)/config.h
	$(XTCC) -o $(OBJDIR)/info.o -c $(OBJDIR)/info_.c

$(OBJDIR)/info.h:	$(OBJDIR)/headers







$(OBJDIR)/leaf_.c:	$(SRCDIR)/leaf.c $(OBJDIR)/translate
	$(OBJDIR)/translate $(SRCDIR)/leaf.c >$(OBJDIR)/leaf_.c

$(OBJDIR)/leaf.o:	$(OBJDIR)/leaf_.c $(OBJDIR)/leaf.h  $(SRCDIR)/config.h
	$(XTCC) -o $(OBJDIR)/leaf.o -c $(OBJDIR)/leaf_.c

$(OBJDIR)/leaf.h:	$(OBJDIR)/headers
................................................................................

$(OBJDIR)/th.o:	$(SRCDIR)/th.c
	$(XTCC) -I$(SRCDIR) -c $(SRCDIR)/th.c -o $(OBJDIR)/th.o

$(OBJDIR)/th_lang.o:	$(SRCDIR)/th_lang.c
	$(XTCC) -I$(SRCDIR) -c $(SRCDIR)/th_lang.c -o $(OBJDIR)/th_lang.o











>







 







>







 







>







 







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|







 







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>
>
>
>
>
>







 







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  $(SRCDIR)/gzip.c \
  $(SRCDIR)/http.c \
  $(SRCDIR)/http_socket.c \
  $(SRCDIR)/http_ssl.c \
  $(SRCDIR)/http_transport.c \
  $(SRCDIR)/import.c \
  $(SRCDIR)/info.c \
  $(SRCDIR)/json.c \
  $(SRCDIR)/leaf.c \
  $(SRCDIR)/login.c \
  $(SRCDIR)/main.c \
  $(SRCDIR)/manifest.c \
  $(SRCDIR)/md5.c \
  $(SRCDIR)/merge.c \
  $(SRCDIR)/merge3.c \
................................................................................
  $(OBJDIR)/gzip_.c \
  $(OBJDIR)/http_.c \
  $(OBJDIR)/http_socket_.c \
  $(OBJDIR)/http_ssl_.c \
  $(OBJDIR)/http_transport_.c \
  $(OBJDIR)/import_.c \
  $(OBJDIR)/info_.c \
  $(OBJDIR)/json_.c \
  $(OBJDIR)/leaf_.c \
  $(OBJDIR)/login_.c \
  $(OBJDIR)/main_.c \
  $(OBJDIR)/manifest_.c \
  $(OBJDIR)/md5_.c \
  $(OBJDIR)/merge_.c \
  $(OBJDIR)/merge3_.c \
................................................................................
 $(OBJDIR)/gzip.o \
 $(OBJDIR)/http.o \
 $(OBJDIR)/http_socket.o \
 $(OBJDIR)/http_ssl.o \
 $(OBJDIR)/http_transport.o \
 $(OBJDIR)/import.o \
 $(OBJDIR)/info.o \
 $(OBJDIR)/json.o \
 $(OBJDIR)/leaf.o \
 $(OBJDIR)/login.o \
 $(OBJDIR)/main.o \
 $(OBJDIR)/manifest.o \
 $(OBJDIR)/md5.o \
 $(OBJDIR)/merge.o \
 $(OBJDIR)/merge3.o \
................................................................................
# to 1. If it is set to 1, then there is no need to build or link
# the sqlite3.o object. Instead, the system sqlite will be linked
# using -lsqlite3.
SQLITE3_OBJ.1 = 
SQLITE3_OBJ.0 = $(OBJDIR)/sqlite3.o
SQLITE3_OBJ.  = $(SQLITE3_OBJ.0)

EXTRAOBJ =  $(SQLITE3_OBJ.$(USE_SYSTEM_SQLITE))  $(OBJDIR)/shell.o  $(OBJDIR)/th.o  $(OBJDIR)/th_lang.o  $(OBJDIR)/cson_amalgamation.o

$(APPNAME):	$(OBJDIR)/headers $(OBJ) $(EXTRAOBJ)
	$(TCC) -o $(APPNAME) $(OBJ) $(EXTRAOBJ) $(LIB)

# This rule prevents make from using its default rules to try build
# an executable named "manifest" out of the file named "manifest.c"
#
................................................................................
clean:	
	rm -rf $(OBJDIR)/* $(APPNAME)


$(OBJDIR)/page_index.h: $(TRANS_SRC) $(OBJDIR)/mkindex
	$(OBJDIR)/mkindex $(TRANS_SRC) >$@
$(OBJDIR)/headers:	$(OBJDIR)/page_index.h $(OBJDIR)/makeheaders $(OBJDIR)/VERSION.h
	$(OBJDIR)/makeheaders  $(OBJDIR)/add_.c:$(OBJDIR)/add.h $(OBJDIR)/allrepo_.c:$(OBJDIR)/allrepo.h $(OBJDIR)/attach_.c:$(OBJDIR)/attach.h $(OBJDIR)/bag_.c:$(OBJDIR)/bag.h $(OBJDIR)/bisect_.c:$(OBJDIR)/bisect.h $(OBJDIR)/blob_.c:$(OBJDIR)/blob.h $(OBJDIR)/branch_.c:$(OBJDIR)/branch.h $(OBJDIR)/browse_.c:$(OBJDIR)/browse.h $(OBJDIR)/captcha_.c:$(OBJDIR)/captcha.h $(OBJDIR)/cgi_.c:$(OBJDIR)/cgi.h $(OBJDIR)/checkin_.c:$(OBJDIR)/checkin.h $(OBJDIR)/checkout_.c:$(OBJDIR)/checkout.h $(OBJDIR)/clearsign_.c:$(OBJDIR)/clearsign.h $(OBJDIR)/clone_.c:$(OBJDIR)/clone.h $(OBJDIR)/comformat_.c:$(OBJDIR)/comformat.h $(OBJDIR)/configure_.c:$(OBJDIR)/configure.h $(OBJDIR)/content_.c:$(OBJDIR)/content.h $(OBJDIR)/db_.c:$(OBJDIR)/db.h $(OBJDIR)/delta_.c:$(OBJDIR)/delta.h $(OBJDIR)/deltacmd_.c:$(OBJDIR)/deltacmd.h $(OBJDIR)/descendants_.c:$(OBJDIR)/descendants.h $(OBJDIR)/diff_.c:$(OBJDIR)/diff.h $(OBJDIR)/diffcmd_.c:$(OBJDIR)/diffcmd.h $(OBJDIR)/doc_.c:$(OBJDIR)/doc.h $(OBJDIR)/encode_.c:$(OBJDIR)/encode.h $(OBJDIR)/event_.c:$(OBJDIR)/event.h $(OBJDIR)/export_.c:$(OBJDIR)/export.h $(OBJDIR)/file_.c:$(OBJDIR)/file.h $(OBJDIR)/finfo_.c:$(OBJDIR)/finfo.h $(OBJDIR)/glob_.c:$(OBJDIR)/glob.h $(OBJDIR)/graph_.c:$(OBJDIR)/graph.h $(OBJDIR)/gzip_.c:$(OBJDIR)/gzip.h $(OBJDIR)/http_.c:$(OBJDIR)/http.h $(OBJDIR)/http_socket_.c:$(OBJDIR)/http_socket.h $(OBJDIR)/http_ssl_.c:$(OBJDIR)/http_ssl.h $(OBJDIR)/http_transport_.c:$(OBJDIR)/http_transport.h $(OBJDIR)/import_.c:$(OBJDIR)/import.h $(OBJDIR)/info_.c:$(OBJDIR)/info.h $(OBJDIR)/json_.c:$(OBJDIR)/json.h $(OBJDIR)/leaf_.c:$(OBJDIR)/leaf.h $(OBJDIR)/login_.c:$(OBJDIR)/login.h $(OBJDIR)/main_.c:$(OBJDIR)/main.h $(OBJDIR)/manifest_.c:$(OBJDIR)/manifest.h $(OBJDIR)/md5_.c:$(OBJDIR)/md5.h $(OBJDIR)/merge_.c:$(OBJDIR)/merge.h $(OBJDIR)/merge3_.c:$(OBJDIR)/merge3.h $(OBJDIR)/name_.c:$(OBJDIR)/name.h $(OBJDIR)/path_.c:$(OBJDIR)/path.h $(OBJDIR)/pivot_.c:$(OBJDIR)/pivot.h $(OBJDIR)/popen_.c:$(OBJDIR)/popen.h $(OBJDIR)/pqueue_.c:$(OBJDIR)/pqueue.h $(OBJDIR)/printf_.c:$(OBJDIR)/printf.h $(OBJDIR)/rebuild_.c:$(OBJDIR)/rebuild.h $(OBJDIR)/report_.c:$(OBJDIR)/report.h $(OBJDIR)/rss_.c:$(OBJDIR)/rss.h $(OBJDIR)/schema_.c:$(OBJDIR)/schema.h $(OBJDIR)/search_.c:$(OBJDIR)/search.h $(OBJDIR)/setup_.c:$(OBJDIR)/setup.h $(OBJDIR)/sha1_.c:$(OBJDIR)/sha1.h $(OBJDIR)/shun_.c:$(OBJDIR)/shun.h $(OBJDIR)/skins_.c:$(OBJDIR)/skins.h $(OBJDIR)/sqlcmd_.c:$(OBJDIR)/sqlcmd.h $(OBJDIR)/stash_.c:$(OBJDIR)/stash.h $(OBJDIR)/stat_.c:$(OBJDIR)/stat.h $(OBJDIR)/style_.c:$(OBJDIR)/style.h $(OBJDIR)/sync_.c:$(OBJDIR)/sync.h $(OBJDIR)/tag_.c:$(OBJDIR)/tag.h $(OBJDIR)/tar_.c:$(OBJDIR)/tar.h $(OBJDIR)/th_main_.c:$(OBJDIR)/th_main.h $(OBJDIR)/timeline_.c:$(OBJDIR)/timeline.h $(OBJDIR)/tkt_.c:$(OBJDIR)/tkt.h $(OBJDIR)/tktsetup_.c:$(OBJDIR)/tktsetup.h $(OBJDIR)/undo_.c:$(OBJDIR)/undo.h $(OBJDIR)/update_.c:$(OBJDIR)/update.h $(OBJDIR)/url_.c:$(OBJDIR)/url.h $(OBJDIR)/user_.c:$(OBJDIR)/user.h $(OBJDIR)/verify_.c:$(OBJDIR)/verify.h $(OBJDIR)/vfile_.c:$(OBJDIR)/vfile.h $(OBJDIR)/wiki_.c:$(OBJDIR)/wiki.h $(OBJDIR)/wikiformat_.c:$(OBJDIR)/wikiformat.h $(OBJDIR)/winhttp_.c:$(OBJDIR)/winhttp.h $(OBJDIR)/xfer_.c:$(OBJDIR)/xfer.h $(OBJDIR)/zip_.c:$(OBJDIR)/zip.h $(SRCDIR)/sqlite3.h $(SRCDIR)/th.h $(OBJDIR)/VERSION.h
	touch $(OBJDIR)/headers
$(OBJDIR)/headers: Makefile
Makefile:
$(OBJDIR)/add_.c:	$(SRCDIR)/add.c $(OBJDIR)/translate
	$(OBJDIR)/translate $(SRCDIR)/add.c >$(OBJDIR)/add_.c

$(OBJDIR)/add.o:	$(OBJDIR)/add_.c $(OBJDIR)/add.h  $(SRCDIR)/config.h
................................................................................
$(OBJDIR)/info_.c:	$(SRCDIR)/info.c $(OBJDIR)/translate
	$(OBJDIR)/translate $(SRCDIR)/info.c >$(OBJDIR)/info_.c

$(OBJDIR)/info.o:	$(OBJDIR)/info_.c $(OBJDIR)/info.h  $(SRCDIR)/config.h
	$(XTCC) -o $(OBJDIR)/info.o -c $(OBJDIR)/info_.c

$(OBJDIR)/info.h:	$(OBJDIR)/headers
$(OBJDIR)/json_.c:	$(SRCDIR)/json.c $(OBJDIR)/translate
	$(OBJDIR)/translate $(SRCDIR)/json.c >$(OBJDIR)/json_.c

$(OBJDIR)/json.o:	$(OBJDIR)/json_.c $(OBJDIR)/json.h  $(SRCDIR)/config.h
	$(XTCC) -o $(OBJDIR)/json.o -c $(OBJDIR)/json_.c

$(OBJDIR)/json.h:	$(OBJDIR)/headers
$(OBJDIR)/leaf_.c:	$(SRCDIR)/leaf.c $(OBJDIR)/translate
	$(OBJDIR)/translate $(SRCDIR)/leaf.c >$(OBJDIR)/leaf_.c

$(OBJDIR)/leaf.o:	$(OBJDIR)/leaf_.c $(OBJDIR)/leaf.h  $(SRCDIR)/config.h
	$(XTCC) -o $(OBJDIR)/leaf.o -c $(OBJDIR)/leaf_.c

$(OBJDIR)/leaf.h:	$(OBJDIR)/headers
................................................................................

$(OBJDIR)/th.o:	$(SRCDIR)/th.c
	$(XTCC) -I$(SRCDIR) -c $(SRCDIR)/th.c -o $(OBJDIR)/th.o

$(OBJDIR)/th_lang.o:	$(SRCDIR)/th_lang.c
	$(XTCC) -I$(SRCDIR) -c $(SRCDIR)/th_lang.c -o $(OBJDIR)/th_lang.o

$(OBJDIR)/cson_amalgamation.o:	$(SRCDIR)/cson_amalgamation.c
	$(XTCC) -I$(SRCDIR) -c $(SRCDIR)/cson_amalgamation.c -o $(OBJDIR)/cson_amalgamation.o

Changes to src/makemake.tcl.

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  graph
  gzip
  http
  http_socket
  http_transport
  import
  info

  leaf
  login
  main
  manifest
  md5
  merge
  merge3
................................................................................
SQLITE3_OBJ.0 = $(OBJDIR)/sqlite3.o
SQLITE3_OBJ.  = $(SQLITE3_OBJ.0)

EXTRAOBJ = \
  $(SQLITE3_OBJ.$(USE_SYSTEM_SQLITE)) \
  $(OBJDIR)/shell.o \
  $(OBJDIR)/th.o \
  $(OBJDIR)/th_lang.o


$(APPNAME):	$(OBJDIR)/headers $(OBJ) $(EXTRAOBJ)
	$(TCC) -o $(APPNAME) $(OBJ) $(EXTRAOBJ) $(LIB)

# This rule prevents make from using its default rules to try build
# an executable named "manifest" out of the file named "manifest.c"
#
................................................................................
set mhargs {}
foreach s [lsort $src] {
  append mhargs " \$(OBJDIR)/${s}_.c:\$(OBJDIR)/$s.h"
  set extra_h($s) {}
}
append mhargs " \$(SRCDIR)/sqlite3.h"
append mhargs " \$(SRCDIR)/th.h"

append mhargs " \$(OBJDIR)/VERSION.h"
writeln "\$(OBJDIR)/page_index.h: \$(TRANS_SRC) \$(OBJDIR)/mkindex"
writeln "\t\$(OBJDIR)/mkindex \$(TRANS_SRC) >$@"
writeln "\$(OBJDIR)/headers:\t\$(OBJDIR)/page_index.h \$(OBJDIR)/makeheaders \$(OBJDIR)/VERSION.h"
writeln "\t\$(OBJDIR)/makeheaders $mhargs"
writeln "\ttouch \$(OBJDIR)/headers"
writeln "\$(OBJDIR)/headers: Makefile"
................................................................................
writeln "\t\$(XTCC) $opt -c \$(SRCDIR)/shell.c -o \$(OBJDIR)/shell.o\n"

writeln "\$(OBJDIR)/th.o:\t\$(SRCDIR)/th.c"
writeln "\t\$(XTCC) -I\$(SRCDIR) -c \$(SRCDIR)/th.c -o \$(OBJDIR)/th.o\n"

writeln "\$(OBJDIR)/th_lang.o:\t\$(SRCDIR)/th_lang.c"
writeln "\t\$(XTCC) -I\$(SRCDIR) -c \$(SRCDIR)/th_lang.c -o \$(OBJDIR)/th_lang.o\n"






close $output_file
#
# End of the main.mk output
##############################################################################
##############################################################################
##############################################################################
................................................................................
$(OBJDIR)/VERSION.h:	$(SRCDIR)/../manifest.uuid $(SRCDIR)/../manifest $(VERSION)
	$(VERSION) $(SRCDIR)/../manifest.uuid $(SRCDIR)/../manifest $(SRCDIR)/../VERSION >$(OBJDIR)/VERSION.h

EXTRAOBJ = \
  $(OBJDIR)/sqlite3.o \
  $(OBJDIR)/shell.o \
  $(OBJDIR)/th.o \
  $(OBJDIR)/th_lang.o


$(APPNAME):	$(OBJDIR)/headers $(OBJ) $(EXTRAOBJ) $(OBJDIR)/icon.o
	$(TCC) -o $(APPNAME) $(OBJ) $(EXTRAOBJ) $(LIB) $(OBJDIR)/icon.o

# This rule prevents make from using its default rules to try build
# an executable named "manifest" out of the file named "manifest.c"
#
................................................................................
}


writeln "\$(OBJDIR)/sqlite3.o:\t\$(SRCDIR)/sqlite3.c"
set opt $SQLITE_OPTIONS
writeln "\t\$(XTCC) $opt -c \$(SRCDIR)/sqlite3.c -o \$(OBJDIR)/sqlite3.o\n"





writeln "\$(OBJDIR)/shell.o:\t\$(SRCDIR)/shell.c \$(SRCDIR)/sqlite3.h"
set opt {-Dmain=sqlite3_shell}
append opt " -DSQLITE_OMIT_LOAD_EXTENSION=1"
writeln "\t\$(XTCC) $opt -c \$(SRCDIR)/shell.c -o \$(OBJDIR)/shell.o\n"

writeln "\$(OBJDIR)/th.o:\t\$(SRCDIR)/th.c"
writeln "\t\$(XTCC) -I\$(SRCDIR) -c \$(SRCDIR)/th.c -o \$(OBJDIR)/th.o\n"
................................................................................
	$(TCC) -o$@ -c $(SQLITE_OPTIONS) $**

$(OBJDIR)\th$O : $(SRCDIR)\th.c
	$(TCC) -o$@ -c $**

$(OBJDIR)\th_lang$O : $(SRCDIR)\th_lang.c
	$(TCC) -o$@ -c $**




VERSION.h : version$E $B\manifest.uuid $B\manifest $B\VERSION
	+$** > $@

page_index.h: mkindex$E $(SRC) 
	+$** > $@

................................................................................
  writeln "\t+translate\$E \$** > \$@\n"
}

writeln -nonewline "headers: makeheaders\$E page_index.h VERSION.h\n\t +makeheaders\$E "
foreach s [lsort $src] {
  writeln -nonewline "${s}_.c:$s.h "
}
writeln "\$(SRCDIR)\\sqlite3.h \$(SRCDIR)\\th.h VERSION.h"
writeln "\t@copy /Y nul: headers"

close $output_file
#
# End of the win/Makefile.dmc output
##############################################################################
##############################################################################
................................................................................
	$(TCC) /Fo$@ -c $**

$(OX)\th_lang$O : $(SRCDIR)\th_lang.c
	$(TCC) /Fo$@ -c $**

VERSION.h : mkversion$E $B\manifest.uuid $B\manifest $B\VERSION
	$** > $@



page_index.h: mkindex$E $(SRC) 
	$** > $@

clean:
	-del $(OX)\*.obj
	-del *.obj *_.c *.h *.map
................................................................................
  writeln "\ttranslate\$E \$** > \$@\n"
}

writeln -nonewline "headers: makeheaders\$E page_index.h VERSION.h\n\tmakeheaders\$E "
foreach s [lsort $src] {
  writeln -nonewline "${s}_.c:$s.h "
}
writeln "\$(SRCDIR)\\sqlite3.h \$(SRCDIR)\\th.h VERSION.h"
writeln "\t@copy /Y nul: headers"


close $output_file
#
# End of the win/Makefile.msc output
##############################################################################







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  graph
  gzip
  http
  http_socket
  http_transport
  import
  info
  json
  leaf
  login
  main
  manifest
  md5
  merge
  merge3
................................................................................
SQLITE3_OBJ.0 = $(OBJDIR)/sqlite3.o
SQLITE3_OBJ.  = $(SQLITE3_OBJ.0)

EXTRAOBJ = \
  $(SQLITE3_OBJ.$(USE_SYSTEM_SQLITE)) \
  $(OBJDIR)/shell.o \
  $(OBJDIR)/th.o \
  $(OBJDIR)/th_lang.o \
  $(OBJDIR)/cson_amalgamation.o

$(APPNAME):	$(OBJDIR)/headers $(OBJ) $(EXTRAOBJ)
	$(TCC) -o $(APPNAME) $(OBJ) $(EXTRAOBJ) $(LIB)

# This rule prevents make from using its default rules to try build
# an executable named "manifest" out of the file named "manifest.c"
#
................................................................................
set mhargs {}
foreach s [lsort $src] {
  append mhargs " \$(OBJDIR)/${s}_.c:\$(OBJDIR)/$s.h"
  set extra_h($s) {}
}
append mhargs " \$(SRCDIR)/sqlite3.h"
append mhargs " \$(SRCDIR)/th.h"
#append mhargs " \$(SRCDIR)/cson_amalgamation.h"
append mhargs " \$(OBJDIR)/VERSION.h"
writeln "\$(OBJDIR)/page_index.h: \$(TRANS_SRC) \$(OBJDIR)/mkindex"
writeln "\t\$(OBJDIR)/mkindex \$(TRANS_SRC) >$@"
writeln "\$(OBJDIR)/headers:\t\$(OBJDIR)/page_index.h \$(OBJDIR)/makeheaders \$(OBJDIR)/VERSION.h"
writeln "\t\$(OBJDIR)/makeheaders $mhargs"
writeln "\ttouch \$(OBJDIR)/headers"
writeln "\$(OBJDIR)/headers: Makefile"
................................................................................
writeln "\t\$(XTCC) $opt -c \$(SRCDIR)/shell.c -o \$(OBJDIR)/shell.o\n"

writeln "\$(OBJDIR)/th.o:\t\$(SRCDIR)/th.c"
writeln "\t\$(XTCC) -I\$(SRCDIR) -c \$(SRCDIR)/th.c -o \$(OBJDIR)/th.o\n"

writeln "\$(OBJDIR)/th_lang.o:\t\$(SRCDIR)/th_lang.c"
writeln "\t\$(XTCC) -I\$(SRCDIR) -c \$(SRCDIR)/th_lang.c -o \$(OBJDIR)/th_lang.o\n"

set opt {}
writeln "\$(OBJDIR)/cson_amalgamation.o:\t\$(SRCDIR)/cson_amalgamation.c"
writeln "\t\$(XTCC) -I\$(SRCDIR) -c \$(SRCDIR)/cson_amalgamation.c -o \$(OBJDIR)/cson_amalgamation.o\n"


close $output_file
#
# End of the main.mk output
##############################################################################
##############################################################################
##############################################################################
................................................................................
$(OBJDIR)/VERSION.h:	$(SRCDIR)/../manifest.uuid $(SRCDIR)/../manifest $(VERSION)
	$(VERSION) $(SRCDIR)/../manifest.uuid $(SRCDIR)/../manifest $(SRCDIR)/../VERSION >$(OBJDIR)/VERSION.h

EXTRAOBJ = \
  $(OBJDIR)/sqlite3.o \
  $(OBJDIR)/shell.o \
  $(OBJDIR)/th.o \
  $(OBJDIR)/th_lang.o \
  $(OBJDIR)/cson_amalgamation.o

$(APPNAME):	$(OBJDIR)/headers $(OBJ) $(EXTRAOBJ) $(OBJDIR)/icon.o
	$(TCC) -o $(APPNAME) $(OBJ) $(EXTRAOBJ) $(LIB) $(OBJDIR)/icon.o

# This rule prevents make from using its default rules to try build
# an executable named "manifest" out of the file named "manifest.c"
#
................................................................................
}


writeln "\$(OBJDIR)/sqlite3.o:\t\$(SRCDIR)/sqlite3.c"
set opt $SQLITE_OPTIONS
writeln "\t\$(XTCC) $opt -c \$(SRCDIR)/sqlite3.c -o \$(OBJDIR)/sqlite3.o\n"

set opt {}
writeln "\$(OBJDIR)/cson_amalgamation.o:\t\$(SRCDIR)/cson_amalgamation.c"
writeln "\t\$(XTCC) $opt -c \$(SRCDIR)/cson_amalgamation.c -o \$(OBJDIR)/cson_amalgamation.o\n"

writeln "\$(OBJDIR)/shell.o:\t\$(SRCDIR)/shell.c \$(SRCDIR)/sqlite3.h"
set opt {-Dmain=sqlite3_shell}
append opt " -DSQLITE_OMIT_LOAD_EXTENSION=1"
writeln "\t\$(XTCC) $opt -c \$(SRCDIR)/shell.c -o \$(OBJDIR)/shell.o\n"

writeln "\$(OBJDIR)/th.o:\t\$(SRCDIR)/th.c"
writeln "\t\$(XTCC) -I\$(SRCDIR) -c \$(SRCDIR)/th.c -o \$(OBJDIR)/th.o\n"
................................................................................
	$(TCC) -o$@ -c $(SQLITE_OPTIONS) $**

$(OBJDIR)\th$O : $(SRCDIR)\th.c
	$(TCC) -o$@ -c $**

$(OBJDIR)\th_lang$O : $(SRCDIR)\th_lang.c
	$(TCC) -o$@ -c $**

$(OBJDIR)\cson_amalgamation.h : $(SRCDIR)\cson_amalgamation.h
	cp $@ $@

VERSION.h : version$E $B\manifest.uuid $B\manifest $B\VERSION
	+$** > $@

page_index.h: mkindex$E $(SRC) 
	+$** > $@

................................................................................
  writeln "\t+translate\$E \$** > \$@\n"
}

writeln -nonewline "headers: makeheaders\$E page_index.h VERSION.h\n\t +makeheaders\$E "
foreach s [lsort $src] {
  writeln -nonewline "${s}_.c:$s.h "
}
writeln "\$(SRCDIR)\\sqlite3.h \$(SRCDIR)\\th.h VERSION.h \$(SRCDIR)\\cson_amalgamation.h"
writeln "\t@copy /Y nul: headers"

close $output_file
#
# End of the win/Makefile.dmc output
##############################################################################
##############################################################################
................................................................................
	$(TCC) /Fo$@ -c $**

$(OX)\th_lang$O : $(SRCDIR)\th_lang.c
	$(TCC) /Fo$@ -c $**

VERSION.h : mkversion$E $B\manifest.uuid $B\manifest $B\VERSION
	$** > $@
$(OBJDIR)\cson_amalgamation.h : $(SRCDIR)\cson_amalgamation.h
	cp $(SRCDIR)\cson_amalgamation.h $@

page_index.h: mkindex$E $(SRC) 
	$** > $@

clean:
	-del $(OX)\*.obj
	-del *.obj *_.c *.h *.map
................................................................................
  writeln "\ttranslate\$E \$** > \$@\n"
}

writeln -nonewline "headers: makeheaders\$E page_index.h VERSION.h\n\tmakeheaders\$E "
foreach s [lsort $src] {
  writeln -nonewline "${s}_.c:$s.h "
}
writeln "\$(SRCDIR)\\sqlite3.h \$(SRCDIR)\\th.h VERSION.h \$(SRCDIR)\\cson_amalgamation.h"
writeln "\t@copy /Y nul: headers"


close $output_file
#
# End of the win/Makefile.msc output
##############################################################################

Changes to src/report.c.

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**  
** Code to generate the ticket listings
*/
#include "config.h"
#include <time.h>
#include "report.h"
#include <assert.h>


/* Forward references to static routines */
static void report_format_hints(void);

/*
** WEBPAGE: /reportlist
*/
................................................................................
  report_restrict_sql(&zErr1);
  sqlite3_exec_readonly(g.db, zSql, output_separated_file, &count, &zErr2);
  report_unrestrict_sql();
  if( zFilter ){
    free(zSql);
  }
}















































































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**  
** Code to generate the ticket listings
*/
#include "config.h"
#include <time.h>
#include "report.h"
#include <assert.h>
#include "cson_amalgamation.h"

/* Forward references to static routines */
static void report_format_hints(void);

/*
** WEBPAGE: /reportlist
*/
................................................................................
  report_restrict_sql(&zErr1);
  sqlite3_exec_readonly(g.db, zSql, output_separated_file, &count, &zErr2);
  report_unrestrict_sql();
  if( zFilter ){
    free(zSql);
  }
}


void rptshowJson( 
    const char *zRep,
    char const * zLimit,
    const char *zFilter,
    char indention
){
  Stmt q;
  char *zSql;
  char const *zTitle;
  char const *zOwner;
  char *zClrKey;
  char *zErr1 = 0;
  int count = 0;
  int rn;
  int rc;
  cson_value * zJVal = NULL;

  if (!zRep || !strcmp(zRep,zFullTicketRptRn) || !strcmp(zRep,zFullTicketRptTitle) ){
    zTitle = zFullTicketRptTitle;
    zSql = mprintf("SELECT * FROM ticket");
    zOwner = g.zLogin;
    zClrKey = "";
  }else{
    rn = atoi(zRep);
    if( rn ){
      db_prepare(&q,
       "SELECT title, sqlcode, owner, cols FROM reportfmt WHERE rn=%d", rn);
    }else{
      db_prepare(&q,
       "SELECT title, sqlcode, owner, cols FROM reportfmt WHERE title=%Q", zRep);
    }
    if( db_step(&q)!=SQLITE_ROW ){
      db_finalize(&q);
      rpt_list_reports();
      fossil_fatal("unkown report format(%s)!",zRep);
    }
    zTitle = db_column_malloc(&q, 0)/*leak!*/;
    zSql = db_column_malloc(&q, 1);
    zOwner = db_column_malloc(&q, 2)/*leak!*/;
    zClrKey = db_column_malloc(&q, 3);
    db_finalize(&q);
  }
  if( zFilter ){
    char * old = zSql;
    zSql = mprintf("SELECT * FROM (%s) WHERE %s%s%s",old,zFilter,
             (zLimit?" LIMIT ":""), (zLimit?zLimit:""));
    free(old);
  }else if( zLimit ){
    char * old = zSql;
    zSql = mprintf("%s LIMIT %s",old, zLimit);
    free(old);
  }
  count = 0;
  /*fprintf(stderr,"SQL=[%s]\n",zSql);*/
  sqlite3_set_authorizer(g.db, report_query_authorizer, (void*)&zErr1);
  rc = cson_sqlite3_sql_to_json(g.db, &zJVal, zSql, 1);
  if( 0 == rc ){
      cson_output_opt outOpt = cson_output_opt_empty;
      outOpt.addNewline = 1;
      outOpt.indentation = indention;
      rc = cson_output_FILE( zJVal, stdout, &outOpt );
  } else{
    fossil_fatal("sql-to-json failed with code %d (%s)!", rc,
                 cson_rc_string(rc));
  }
  sqlite3_set_authorizer(g.db, 0, 0);
  cson_value_free(zJVal);
  free(zSql);
  free(zClrKey);
}

Changes to src/timeline.c.

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** This file contains code to implement the timeline web page
**
*/
#include <string.h>
#include <time.h>
#include "config.h"
#include "timeline.h"


/*
** Shorten a UUID so that is the minimum length needed to contain
** at least one digit in the range 'a'..'f'.  The minimum length is 10.
*/
static void shorten_uuid(char *zDest, const char *zSrc){
  int i;
................................................................................
/*
** Return a pointer to a static string that forms the basis for
** a timeline query for display on a TTY.
*/
const char *timeline_query_for_tty(void){
  static const char zBaseSql[] = 
    @ SELECT
    @   blob.rid,
    @   uuid,
    @   datetime(event.mtime,'localtime'),
    @   coalesce(ecomment,comment)
    @     || ' (user: ' || coalesce(euser,user,'?')
    @     || (SELECT case when length(x)>0 then ' tags: ' || x else '' end
    @           FROM (SELECT group_concat(substr(tagname,5), ', ') AS x
    @                   FROM tag, tagxref
    @                  WHERE tagname GLOB 'sym-*' AND tag.tagid=tagxref.tagid
    @                    AND tagxref.rid=blob.rid AND tagxref.tagtype>0))
    @     || ')',
    @   (SELECT count(*) FROM plink WHERE pid=blob.rid AND isprim),
    @   (SELECT count(*) FROM plink WHERE cid=blob.rid),
    @   event.mtime
    @ FROM event, blob
    @ WHERE blob.rid=event.objid
  ;
  return zBaseSql;
}

/*
................................................................................
** The optional TYPE argument may any types supported by the /timeline
** page. For example:
**
**     w  = wiki commits only
**     ci = file commits only
**     t  = tickets only
**
** The optional showfiles argument if specified prints the list of
** files changed in a checkin after the checkin comment
**
*/
void timeline_cmd(void){
  Stmt q;
  int n, k;
  const char *zCount;
  const char *zType;
................................................................................
  char *zOrigin;
  char *zDate;
  Blob sql;
  int objid = 0;
  Blob uuid;
  int mode = 0 ;       /* 0:none  1: before  2:after  3:children  4:parents */
  int showfilesFlag = 0 ;


  showfilesFlag = find_option("showfiles","f", 0)!=0;
  db_find_and_open_repository(0, 0);
  zCount = find_option("count","n",1);
  zType = find_option("type","t",1);
  if( zCount ){
    n = atoi(zCount);
  }else{
................................................................................
      compute_ancestors(objid, n);
    }
    blob_appendf(&sql, " AND blob.rid IN ok");
  }
  if( zType && (zType[0]!='a') ){
    blob_appendf(&sql, " AND event.type=%Q ", zType);
  }

  blob_appendf(&sql, " ORDER BY event.mtime DESC");
  db_prepare(&q, blob_str(&sql));
  blob_reset(&sql);
  print_timeline(&q, n, showfilesFlag);
  db_finalize(&q);
}








>







 







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** This file contains code to implement the timeline web page
**
*/
#include <string.h>
#include <time.h>
#include "config.h"
#include "timeline.h"
#include "cson_amalgamation.h"

/*
** Shorten a UUID so that is the minimum length needed to contain
** at least one digit in the range 'a'..'f'.  The minimum length is 10.
*/
static void shorten_uuid(char *zDest, const char *zSrc){
  int i;
................................................................................
/*
** Return a pointer to a static string that forms the basis for
** a timeline query for display on a TTY.
*/
const char *timeline_query_for_tty(void){
  static const char zBaseSql[] = 
    @ SELECT
    @   blob.rid AS rid,
    @   uuid,
    @   datetime(event.mtime,'localtime') AS mDateTime,
    @   coalesce(ecomment,comment)
    @     || ' (user: ' || coalesce(euser,user,'?')
    @     || (SELECT case when length(x)>0 then ' tags: ' || x else '' end
    @           FROM (SELECT group_concat(substr(tagname,5), ', ') AS x
    @                   FROM tag, tagxref
    @                  WHERE tagname GLOB 'sym-*' AND tag.tagid=tagxref.tagid
    @                    AND tagxref.rid=blob.rid AND tagxref.tagtype>0))
    @     || ')' as comment,
    @   (SELECT count(*) FROM plink WHERE pid=blob.rid AND isprim) AS primPlinkCount,
    @   (SELECT count(*) FROM plink WHERE cid=blob.rid) AS plinkCount,
    @   event.mtime AS mtime
    @ FROM event, blob
    @ WHERE blob.rid=event.objid
  ;
  return zBaseSql;
}

/*
................................................................................
** The optional TYPE argument may any types supported by the /timeline
** page. For example:
**
**     w  = wiki commits only
**     ci = file commits only
**     t  = tickets only
**
** The optional showfiles argument, if specified, prints the list of
** files changed in a checkin after the checkin comment.
**
*/
void timeline_cmd(void){
  Stmt q;
  int n, k;
  const char *zCount;
  const char *zType;
................................................................................
  char *zOrigin;
  char *zDate;
  Blob sql;
  int objid = 0;
  Blob uuid;
  int mode = 0 ;       /* 0:none  1: before  2:after  3:children  4:parents */
  int showfilesFlag = 0 ;

  db_find_and_open_repository(0, 0);
  showfilesFlag = find_option("showfiles","f", 0)!=0;
  db_find_and_open_repository(0, 0);
  zCount = find_option("count","n",1);
  zType = find_option("type","t",1);
  if( zCount ){
    n = atoi(zCount);
  }else{
................................................................................
      compute_ancestors(objid, n);
    }
    blob_appendf(&sql, " AND blob.rid IN ok");
  }
  if( zType && (zType[0]!='a') ){
    blob_appendf(&sql, " AND event.type=%Q ", zType);
  }

  blob_appendf(&sql, " ORDER BY event.mtime DESC");
  db_prepare(&q, blob_str(&sql));
  blob_reset(&sql);
  print_timeline(&q, n, showfilesFlag);
  db_finalize(&q);
}

Changes to src/tkt.c.

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**           ?-q|--quote?
**           ?-R|--repository FILE?
**
**         Run the ticket report, identified by the report format title
**         used in the gui. The data is written as flat file on stdout,
**         using "," as separator. The separator "," can be changed using
**         the -l or --limit option.

**         If TICKETFILTER is given on the commandline, the query is
**         limited with a new WHERE-condition.
**           example:  Report lists a column # with the uuid
**                     TICKETFILTER may be [#]='uuuuuuuuu'
**           example:  Report only lists rows with status not open
**                     TICKETFILTER: status != 'open'
**         If the option -q|--quote is used, the tickets are encoded by
**         quoting special chars(space -> \\s, tab -> \\t, newline -> \\n,
**         cr -> \\r, formfeed -> \\f, vtab -> \\v, nul -> \\0, \\ -> \\\\).
**         Otherwise, the simplified encoding as on the show report raw
**         page in the gui is used.
**
**         Instead of the report title its possible to use the report
**         number. Using the special report number 0 list all columns,
**         defined in the ticket table.
**
**     %fossil ticket list fields
**
................................................................................
      if( strncmp(g.argv[2],"show",n)==0 ){
        if( g.argc==3 ){
          usage("show REPORTNR");
        }else{
          const char *zRep = 0;
          const char *zSep = 0;
          const char *zFilterUuid = 0;

          zSep = find_option("limit","l",1);
          zRep = g.argv[3];
          if( !strcmp(zRep,"0") ){
            zRep = 0;
          }
          if( g.argc>4 ){
            zFilterUuid = g.argv[4];
          }

          rptshow( zRep, zSep, zFilterUuid, tktEncoding );

        }
      }else{
        /* add a new ticket or update an existing ticket */
        enum { set,add,history,err } eCmd = err;
        int i = 0;
        int rid;
        const char *zTktUuid = 0;







>










|







 







<








<

<







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**           ?-q|--quote?
**           ?-R|--repository FILE?
**
**         Run the ticket report, identified by the report format title
**         used in the gui. The data is written as flat file on stdout,
**         using "," as separator. The separator "," can be changed using
**         the -l or --limit option.
**
**         If TICKETFILTER is given on the commandline, the query is
**         limited with a new WHERE-condition.
**           example:  Report lists a column # with the uuid
**                     TICKETFILTER may be [#]='uuuuuuuuu'
**           example:  Report only lists rows with status not open
**                     TICKETFILTER: status != 'open'
**         If the option -q|--quote is used, the tickets are encoded by
**         quoting special chars(space -> \\s, tab -> \\t, newline -> \\n,
**         cr -> \\r, formfeed -> \\f, vtab -> \\v, nul -> \\0, \\ -> \\\\).
**         Otherwise, the simplified encoding as on the show report raw
**         page in the gui is used. This has no effect in JSON mode.
**
**         Instead of the report title its possible to use the report
**         number. Using the special report number 0 list all columns,
**         defined in the ticket table.
**
**     %fossil ticket list fields
**
................................................................................
      if( strncmp(g.argv[2],"show",n)==0 ){
        if( g.argc==3 ){
          usage("show REPORTNR");
        }else{
          const char *zRep = 0;
          const char *zSep = 0;
          const char *zFilterUuid = 0;

          zSep = find_option("limit","l",1);
          zRep = g.argv[3];
          if( !strcmp(zRep,"0") ){
            zRep = 0;
          }
          if( g.argc>4 ){
            zFilterUuid = g.argv[4];
          }

          rptshow( zRep, zSep, zFilterUuid, tktEncoding );

        }
      }else{
        /* add a new ticket or update an existing ticket */
        enum { set,add,history,err } eCmd = err;
        int i = 0;
        int rid;
        const char *zTktUuid = 0;

Changes to src/wiki.c.

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  @ %h(blob_str(&d))
  @ </pre>
  manifest_destroy(pW1);
  manifest_destroy(pW2);
  style_footer();
}


















/*
** WEBPAGE: wcontent
**
**     all=1         Show deleted pages
**
** List all available wiki pages with date created and last modified.
*/
................................................................................
  style_header("Available Wiki Pages");
  if( showAll ){
    style_submenu_element("Active", "Only Active Pages", "%s/wcontent", g.zTop);
  }else{
    style_submenu_element("All", "All", "%s/wcontent?all=1", g.zTop);
  }
  @ <ul>
  db_prepare(&q, 
    "SELECT"
    "  substr(tagname, 6),"
    "  (SELECT value FROM tagxref WHERE tagid=tag.tagid ORDER BY mtime DESC)"
    "  FROM tag WHERE tagname GLOB 'wiki-*'"
    " ORDER BY lower(tagname) /*sort*/"
  );
  while( db_step(&q)==SQLITE_ROW ){
    const char *zName = db_column_text(&q, 0);
    int size = db_column_int(&q, 1);
    if( size>0 ){
      @ <li><a href="%s(g.zTop)/wiki?name=%T(zName)">%h(zName)</a></li>
    }else if( showAll ){
      @ <li><a href="%s(g.zTop)/wiki?name=%T(zName)"><s>%h(zName)</s></a></li>







>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>







 







|
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<
<
<
<
<







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  @ %h(blob_str(&d))
  @ </pre>
  manifest_destroy(pW1);
  manifest_destroy(pW2);
  style_footer();
}

/*
** prepare()s pStmt with a query requesting:
**
** - wiki page name
** - tagxref (whatever that really is!)
**
** Used by wcontent_page() and the JSON wiki code.
*/
void wiki_prepare_page_list( Stmt * pStmt ){
  db_prepare(pStmt, 
    "SELECT"
    "  substr(tagname, 6) as name,"
    "  (SELECT value FROM tagxref WHERE tagid=tag.tagid ORDER BY mtime DESC) as tagXref"
    "  FROM tag WHERE tagname GLOB 'wiki-*'"
    " ORDER BY lower(tagname) /*sort*/"
  );
}
/*
** WEBPAGE: wcontent
**
**     all=1         Show deleted pages
**
** List all available wiki pages with date created and last modified.
*/
................................................................................
  style_header("Available Wiki Pages");
  if( showAll ){
    style_submenu_element("Active", "Only Active Pages", "%s/wcontent", g.zTop);
  }else{
    style_submenu_element("All", "All", "%s/wcontent?all=1", g.zTop);
  }
  @ <ul>
  wiki_prepare_page_list(&q);






  while( db_step(&q)==SQLITE_ROW ){
    const char *zName = db_column_text(&q, 0);
    int size = db_column_int(&q, 1);
    if( size>0 ){
      @ <li><a href="%s(g.zTop)/wiki?name=%T(zName)">%h(zName)</a></li>
    }else if( showAll ){
      @ <li><a href="%s(g.zTop)/wiki?name=%T(zName)"><s>%h(zName)</s></a></li>

Changes to win/Makefile.dmc.

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CFLAGS = -o
BCC    = $(DMDIR)\bin\dmc $(CFLAGS)
TCC    = $(DMDIR)\bin\dmc $(CFLAGS) $(DMCDEF) $(SSL) $(INCL)
LIBS   = $(DMDIR)\extra\lib\ zlib wsock32

SQLITE_OPTIONS = -DSQLITE_OMIT_LOAD_EXTENSION=1 -DSQLITE_THREADSAFE=0 -DSQLITE_DEFAULT_FILE_FORMAT=4 -DSQLITE_ENABLE_STAT3 -Dlocaltime=fossil_localtime -DSQLITE_ENABLE_LOCKING_STYLE=0

SRC   = add_.c allrepo_.c attach_.c bag_.c bisect_.c blob_.c branch_.c browse_.c captcha_.c cgi_.c checkin_.c checkout_.c clearsign_.c clone_.c comformat_.c configure_.c content_.c db_.c delta_.c deltacmd_.c descendants_.c diff_.c diffcmd_.c doc_.c encode_.c event_.c export_.c file_.c finfo_.c glob_.c graph_.c gzip_.c http_.c http_socket_.c http_ssl_.c http_transport_.c import_.c info_.c leaf_.c login_.c main_.c manifest_.c md5_.c merge_.c merge3_.c name_.c path_.c pivot_.c popen_.c pqueue_.c printf_.c rebuild_.c report_.c rss_.c schema_.c search_.c setup_.c sha1_.c shun_.c skins_.c sqlcmd_.c stash_.c stat_.c style_.c sync_.c tag_.c tar_.c th_main_.c timeline_.c tkt_.c tktsetup_.c undo_.c update_.c url_.c user_.c verify_.c vfile_.c wiki_.c wikiformat_.c winhttp_.c xfer_.c zip_.c 

OBJ   = $(OBJDIR)\add$O $(OBJDIR)\allrepo$O $(OBJDIR)\attach$O $(OBJDIR)\bag$O $(OBJDIR)\bisect$O $(OBJDIR)\blob$O $(OBJDIR)\branch$O $(OBJDIR)\browse$O $(OBJDIR)\captcha$O $(OBJDIR)\cgi$O $(OBJDIR)\checkin$O $(OBJDIR)\checkout$O $(OBJDIR)\clearsign$O $(OBJDIR)\clone$O $(OBJDIR)\comformat$O $(OBJDIR)\configure$O $(OBJDIR)\content$O $(OBJDIR)\db$O $(OBJDIR)\delta$O $(OBJDIR)\deltacmd$O $(OBJDIR)\descendants$O $(OBJDIR)\diff$O $(OBJDIR)\diffcmd$O $(OBJDIR)\doc$O $(OBJDIR)\encode$O $(OBJDIR)\event$O $(OBJDIR)\export$O $(OBJDIR)\file$O $(OBJDIR)\finfo$O $(OBJDIR)\glob$O $(OBJDIR)\graph$O $(OBJDIR)\gzip$O $(OBJDIR)\http$O $(OBJDIR)\http_socket$O $(OBJDIR)\http_ssl$O $(OBJDIR)\http_transport$O $(OBJDIR)\import$O $(OBJDIR)\info$O $(OBJDIR)\leaf$O $(OBJDIR)\login$O $(OBJDIR)\main$O $(OBJDIR)\manifest$O $(OBJDIR)\md5$O $(OBJDIR)\merge$O $(OBJDIR)\merge3$O $(OBJDIR)\name$O $(OBJDIR)\path$O $(OBJDIR)\pivot$O $(OBJDIR)\popen$O $(OBJDIR)\pqueue$O $(OBJDIR)\printf$O $(OBJDIR)\rebuild$O $(OBJDIR)\report$O $(OBJDIR)\rss$O $(OBJDIR)\schema$O $(OBJDIR)\search$O $(OBJDIR)\setup$O $(OBJDIR)\sha1$O $(OBJDIR)\shun$O $(OBJDIR)\skins$O $(OBJDIR)\sqlcmd$O $(OBJDIR)\stash$O $(OBJDIR)\stat$O $(OBJDIR)\style$O $(OBJDIR)\sync$O $(OBJDIR)\tag$O $(OBJDIR)\tar$O $(OBJDIR)\th_main$O $(OBJDIR)\timeline$O $(OBJDIR)\tkt$O $(OBJDIR)\tktsetup$O $(OBJDIR)\undo$O $(OBJDIR)\update$O $(OBJDIR)\url$O $(OBJDIR)\user$O $(OBJDIR)\verify$O $(OBJDIR)\vfile$O $(OBJDIR)\wiki$O $(OBJDIR)\wikiformat$O $(OBJDIR)\winhttp$O $(OBJDIR)\xfer$O $(OBJDIR)\zip$O $(OBJDIR)\shell$O $(OBJDIR)\sqlite3$O $(OBJDIR)\th$O $(OBJDIR)\th_lang$O 


RC=$(DMDIR)\bin\rcc
RCFLAGS=-32 -w1 -I$(SRCDIR) /D__DMC__

APPNAME = $(OBJDIR)\fossil$(E)

................................................................................
	cd $(OBJDIR) 
	$(DMDIR)\bin\link @link

$(OBJDIR)\fossil.res:	$B\win\fossil.rc
	$(RC) $(RCFLAGS) -o$@ $**

$(OBJDIR)\link: $B\win\Makefile.dmc $(OBJDIR)\fossil.res
	+echo add allrepo attach bag bisect blob branch browse captcha cgi checkin checkout clearsign clone comformat configure content db delta deltacmd descendants diff diffcmd doc encode event export file finfo glob graph gzip http http_socket http_ssl http_transport import info leaf login main manifest md5 merge merge3 name path pivot popen pqueue printf rebuild report rss schema search setup sha1 shun skins sqlcmd stash stat style sync tag tar th_main timeline tkt tktsetup undo update url user verify vfile wiki wikiformat winhttp xfer zip shell sqlite3 th th_lang > $@
	+echo fossil >> $@
	+echo fossil >> $@
	+echo $(LIBS) >> $@
	+echo. >> $@
	+echo fossil >> $@

translate$E: $(SRCDIR)\translate.c
................................................................................
	$(TCC) -o$@ -c $(SQLITE_OPTIONS) $**

$(OBJDIR)\th$O : $(SRCDIR)\th.c
	$(TCC) -o$@ -c $**

$(OBJDIR)\th_lang$O : $(SRCDIR)\th_lang.c
	$(TCC) -o$@ -c $**




VERSION.h : version$E $B\manifest.uuid $B\manifest $B\VERSION
	+$** > $@

page_index.h: mkindex$E $(SRC) 
	+$** > $@

................................................................................
	+translate$E $** > $@

$(OBJDIR)\info$O : info_.c info.h
	$(TCC) -o$@ -c info_.c

info_.c : $(SRCDIR)\info.c
	+translate$E $** > $@







$(OBJDIR)\leaf$O : leaf_.c leaf.h
	$(TCC) -o$@ -c leaf_.c

leaf_.c : $(SRCDIR)\leaf.c
	+translate$E $** > $@

................................................................................
$(OBJDIR)\zip$O : zip_.c zip.h
	$(TCC) -o$@ -c zip_.c

zip_.c : $(SRCDIR)\zip.c
	+translate$E $** > $@

headers: makeheaders$E page_index.h VERSION.h
	 +makeheaders$E add_.c:add.h allrepo_.c:allrepo.h attach_.c:attach.h bag_.c:bag.h bisect_.c:bisect.h blob_.c:blob.h branch_.c:branch.h browse_.c:browse.h captcha_.c:captcha.h cgi_.c:cgi.h checkin_.c:checkin.h checkout_.c:checkout.h clearsign_.c:clearsign.h clone_.c:clone.h comformat_.c:comformat.h configure_.c:configure.h content_.c:content.h db_.c:db.h delta_.c:delta.h deltacmd_.c:deltacmd.h descendants_.c:descendants.h diff_.c:diff.h diffcmd_.c:diffcmd.h doc_.c:doc.h encode_.c:encode.h event_.c:event.h export_.c:export.h file_.c:file.h finfo_.c:finfo.h glob_.c:glob.h graph_.c:graph.h gzip_.c:gzip.h http_.c:http.h http_socket_.c:http_socket.h http_ssl_.c:http_ssl.h http_transport_.c:http_transport.h import_.c:import.h info_.c:info.h leaf_.c:leaf.h login_.c:login.h main_.c:main.h manifest_.c:manifest.h md5_.c:md5.h merge_.c:merge.h merge3_.c:merge3.h name_.c:name.h path_.c:path.h pivot_.c:pivot.h popen_.c:popen.h pqueue_.c:pqueue.h printf_.c:printf.h rebuild_.c:rebuild.h report_.c:report.h rss_.c:rss.h schema_.c:schema.h search_.c:search.h setup_.c:setup.h sha1_.c:sha1.h shun_.c:shun.h skins_.c:skins.h sqlcmd_.c:sqlcmd.h stash_.c:stash.h stat_.c:stat.h style_.c:style.h sync_.c:sync.h tag_.c:tag.h tar_.c:tar.h th_main_.c:th_main.h timeline_.c:timeline.h tkt_.c:tkt.h tktsetup_.c:tktsetup.h undo_.c:undo.h update_.c:update.h url_.c:url.h user_.c:user.h verify_.c:verify.h vfile_.c:vfile.h wiki_.c:wiki.h wikiformat_.c:wikiformat.h winhttp_.c:winhttp.h xfer_.c:xfer.h zip_.c:zip.h $(SRCDIR)\sqlite3.h $(SRCDIR)\th.h VERSION.h
	@copy /Y nul: headers







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CFLAGS = -o
BCC    = $(DMDIR)\bin\dmc $(CFLAGS)
TCC    = $(DMDIR)\bin\dmc $(CFLAGS) $(DMCDEF) $(SSL) $(INCL)
LIBS   = $(DMDIR)\extra\lib\ zlib wsock32

SQLITE_OPTIONS = -DSQLITE_OMIT_LOAD_EXTENSION=1 -DSQLITE_THREADSAFE=0 -DSQLITE_DEFAULT_FILE_FORMAT=4 -DSQLITE_ENABLE_STAT3 -Dlocaltime=fossil_localtime -DSQLITE_ENABLE_LOCKING_STYLE=0

SRC   = add_.c allrepo_.c attach_.c bag_.c bisect_.c blob_.c branch_.c browse_.c captcha_.c cgi_.c checkin_.c checkout_.c clearsign_.c clone_.c comformat_.c configure_.c content_.c db_.c delta_.c deltacmd_.c descendants_.c diff_.c diffcmd_.c doc_.c encode_.c event_.c export_.c file_.c finfo_.c glob_.c graph_.c gzip_.c http_.c http_socket_.c http_ssl_.c http_transport_.c import_.c info_.c json_.c leaf_.c login_.c main_.c manifest_.c md5_.c merge_.c merge3_.c name_.c path_.c pivot_.c popen_.c pqueue_.c printf_.c rebuild_.c report_.c rss_.c schema_.c search_.c setup_.c sha1_.c shun_.c skins_.c sqlcmd_.c stash_.c stat_.c style_.c sync_.c tag_.c tar_.c th_main_.c timeline_.c tkt_.c tktsetup_.c undo_.c update_.c url_.c user_.c verify_.c vfile_.c wiki_.c wikiformat_.c winhttp_.c xfer_.c zip_.c 

OBJ   = $(OBJDIR)\add$O $(OBJDIR)\allrepo$O $(OBJDIR)\attach$O $(OBJDIR)\bag$O $(OBJDIR)\bisect$O $(OBJDIR)\blob$O $(OBJDIR)\branch$O $(OBJDIR)\browse$O $(OBJDIR)\captcha$O $(OBJDIR)\cgi$O $(OBJDIR)\checkin$O $(OBJDIR)\checkout$O $(OBJDIR)\clearsign$O $(OBJDIR)\clone$O $(OBJDIR)\comformat$O $(OBJDIR)\configure$O $(OBJDIR)\content$O $(OBJDIR)\db$O $(OBJDIR)\delta$O $(OBJDIR)\deltacmd$O $(OBJDIR)\descendants$O $(OBJDIR)\diff$O $(OBJDIR)\diffcmd$O $(OBJDIR)\doc$O $(OBJDIR)\encode$O $(OBJDIR)\event$O $(OBJDIR)\export$O $(OBJDIR)\file$O $(OBJDIR)\finfo$O $(OBJDIR)\glob$O $(OBJDIR)\graph$O $(OBJDIR)\gzip$O $(OBJDIR)\http$O $(OBJDIR)\http_socket$O $(OBJDIR)\http_ssl$O $(OBJDIR)\http_transport$O $(OBJDIR)\import$O $(OBJDIR)\info$O $(OBJDIR)\json$O $(OBJDIR)\leaf$O $(OBJDIR)\login$O $(OBJDIR)\main$O $(OBJDIR)\manifest$O $(OBJDIR)\md5$O $(OBJDIR)\merge$O $(OBJDIR)\merge3$O $(OBJDIR)\name$O $(OBJDIR)\path$O $(OBJDIR)\pivot$O $(OBJDIR)\popen$O $(OBJDIR)\pqueue$O $(OBJDIR)\printf$O $(OBJDIR)\rebuild$O $(OBJDIR)\report$O $(OBJDIR)\rss$O $(OBJDIR)\schema$O $(OBJDIR)\search$O $(OBJDIR)\setup$O $(OBJDIR)\sha1$O $(OBJDIR)\shun$O $(OBJDIR)\skins$O $(OBJDIR)\sqlcmd$O $(OBJDIR)\stash$O $(OBJDIR)\stat$O $(OBJDIR)\style$O $(OBJDIR)\sync$O $(OBJDIR)\tag$O $(OBJDIR)\tar$O $(OBJDIR)\th_main$O $(OBJDIR)\timeline$O $(OBJDIR)\tkt$O $(OBJDIR)\tktsetup$O $(OBJDIR)\undo$O $(OBJDIR)\update$O $(OBJDIR)\url$O $(OBJDIR)\user$O $(OBJDIR)\verify$O $(OBJDIR)\vfile$O $(OBJDIR)\wiki$O $(OBJDIR)\wikiformat$O $(OBJDIR)\winhttp$O $(OBJDIR)\xfer$O $(OBJDIR)\zip$O $(OBJDIR)\shell$O $(OBJDIR)\sqlite3$O $(OBJDIR)\th$O $(OBJDIR)\th_lang$O 


RC=$(DMDIR)\bin\rcc
RCFLAGS=-32 -w1 -I$(SRCDIR) /D__DMC__

APPNAME = $(OBJDIR)\fossil$(E)

................................................................................
	cd $(OBJDIR) 
	$(DMDIR)\bin\link @link

$(OBJDIR)\fossil.res:	$B\win\fossil.rc
	$(RC) $(RCFLAGS) -o$@ $**

$(OBJDIR)\link: $B\win\Makefile.dmc $(OBJDIR)\fossil.res
	+echo add allrepo attach bag bisect blob branch browse captcha cgi checkin checkout clearsign clone comformat configure content db delta deltacmd descendants diff diffcmd doc encode event export file finfo glob graph gzip http http_socket http_ssl http_transport import info json leaf login main manifest md5 merge merge3 name path pivot popen pqueue printf rebuild report rss schema search setup sha1 shun skins sqlcmd stash stat style sync tag tar th_main timeline tkt tktsetup undo update url user verify vfile wiki wikiformat winhttp xfer zip shell sqlite3 th th_lang > $@
	+echo fossil >> $@
	+echo fossil >> $@
	+echo $(LIBS) >> $@
	+echo. >> $@
	+echo fossil >> $@

translate$E: $(SRCDIR)\translate.c
................................................................................
	$(TCC) -o$@ -c $(SQLITE_OPTIONS) $**

$(OBJDIR)\th$O : $(SRCDIR)\th.c
	$(TCC) -o$@ -c $**

$(OBJDIR)\th_lang$O : $(SRCDIR)\th_lang.c
	$(TCC) -o$@ -c $**

$(OBJDIR)\cson_amalgamation.h : $(SRCDIR)\cson_amalgamation.h
	cp $@ $@

VERSION.h : version$E $B\manifest.uuid $B\manifest $B\VERSION
	+$** > $@

page_index.h: mkindex$E $(SRC) 
	+$** > $@

................................................................................
	+translate$E $** > $@

$(OBJDIR)\info$O : info_.c info.h
	$(TCC) -o$@ -c info_.c

info_.c : $(SRCDIR)\info.c
	+translate$E $** > $@

$(OBJDIR)\json$O : json_.c json.h
	$(TCC) -o$@ -c json_.c

json_.c : $(SRCDIR)\json.c
	+translate$E $** > $@

$(OBJDIR)\leaf$O : leaf_.c leaf.h
	$(TCC) -o$@ -c leaf_.c

leaf_.c : $(SRCDIR)\leaf.c
	+translate$E $** > $@

................................................................................
$(OBJDIR)\zip$O : zip_.c zip.h
	$(TCC) -o$@ -c zip_.c

zip_.c : $(SRCDIR)\zip.c
	+translate$E $** > $@

headers: makeheaders$E page_index.h VERSION.h
	 +makeheaders$E add_.c:add.h allrepo_.c:allrepo.h attach_.c:attach.h bag_.c:bag.h bisect_.c:bisect.h blob_.c:blob.h branch_.c:branch.h browse_.c:browse.h captcha_.c:captcha.h cgi_.c:cgi.h checkin_.c:checkin.h checkout_.c:checkout.h clearsign_.c:clearsign.h clone_.c:clone.h comformat_.c:comformat.h configure_.c:configure.h content_.c:content.h db_.c:db.h delta_.c:delta.h deltacmd_.c:deltacmd.h descendants_.c:descendants.h diff_.c:diff.h diffcmd_.c:diffcmd.h doc_.c:doc.h encode_.c:encode.h event_.c:event.h export_.c:export.h file_.c:file.h finfo_.c:finfo.h glob_.c:glob.h graph_.c:graph.h gzip_.c:gzip.h http_.c:http.h http_socket_.c:http_socket.h http_ssl_.c:http_ssl.h http_transport_.c:http_transport.h import_.c:import.h info_.c:info.h json_.c:json.h leaf_.c:leaf.h login_.c:login.h main_.c:main.h manifest_.c:manifest.h md5_.c:md5.h merge_.c:merge.h merge3_.c:merge3.h name_.c:name.h path_.c:path.h pivot_.c:pivot.h popen_.c:popen.h pqueue_.c:pqueue.h printf_.c:printf.h rebuild_.c:rebuild.h report_.c:report.h rss_.c:rss.h schema_.c:schema.h search_.c:search.h setup_.c:setup.h sha1_.c:sha1.h shun_.c:shun.h skins_.c:skins.h sqlcmd_.c:sqlcmd.h stash_.c:stash.h stat_.c:stat.h style_.c:style.h sync_.c:sync.h tag_.c:tag.h tar_.c:tar.h th_main_.c:th_main.h timeline_.c:timeline.h tkt_.c:tkt.h tktsetup_.c:tktsetup.h undo_.c:undo.h update_.c:update.h url_.c:url.h user_.c:user.h verify_.c:verify.h vfile_.c:vfile.h wiki_.c:wiki.h wikiformat_.c:wikiformat.h winhttp_.c:winhttp.h xfer_.c:xfer.h zip_.c:zip.h $(SRCDIR)\sqlite3.h $(SRCDIR)\th.h VERSION.h $(SRCDIR)\cson_amalgamation.h
	@copy /Y nul: headers

Changes to win/Makefile.mingw.

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