/*
** Copyright (c) 2010 D. Richard Hipp
** Copyright © 2010 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

  db_multi_exec("CREATE TEMPORARY TABLE oldblob(rid INTEGER PRIMARY KEY)");
  db_multi_exec("CREATE TEMPORARY TABLE oldcommit(rid INTEGER PRIMARY KEY)");
  if( markfile_in!=0 ){
    Stmt qb,qc;
    char line[100];
    FILE *f;

    f = fopen(markfile_in, "r");
    f = fossil_fopen(markfile_in, "r");
    if( f==0 ){
      fossil_panic("cannot open %s for reading", markfile_in);
    }
    db_prepare(&qb, "INSERT OR IGNORE INTO oldblob VALUES (:rid)");
    db_prepare(&qc, "INSERT OR IGNORE INTO oldcommit VALUES (:rid)");
    while( fgets(line, sizeof(line), f)!=0 ){
      if( *line == 'b' ){

    fossil_free(zEncoded);
  }
  db_finalize(&q);
  bag_clear(&vers);

  if( markfile_out!=0 ){
    FILE *f;
    f = fopen(markfile_out, "w");
    f = fossil_fopen(markfile_out, "w");
    if( f == 0 ){
      fossil_panic("cannot open %s for writing", markfile_out);
    }
    db_prepare(&q, "SELECT rid FROM oldblob");
    while( db_step(&q)==SQLITE_ROW ){
      fprintf(f, "b%d\n", db_column_int(&q, 0));
    }

/*
** Copyright (c) 2006 D. Richard Hipp
** Copyright © 2006 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

#include <errno.h>
#include "file.h"

/*
** On Windows, include the Platform SDK header file.
*/
#ifdef _WIN32
# include <direct.h>
# include <windows.h>
#endif

/*
** The file status information from the most recent stat() call.
**
** Use _stati64 rather than stat on windows, in order to handle files

  if( isWd && g.allowSymlinks ){
    return lstat(zFilename, buf);
  }else{
    return stat(zFilename, buf);
  }
#else
  int rc = 0;
  char *zMbcs = fossil_utf8_to_mbcs(zFilename);
  rc = stat(zMbcs, buf);
  wchar_t *zMbcs = fossil_utf8_to_unicode(zFilename);
  rc = _wstati64(zMbcs, buf);
  fossil_mbcs_free(zMbcs);
  return rc;
#endif
}

/*
** Fill in the fileStat variable for the file named zFilename.

}


/*
** Wrapper around the access() system call.
*/
int file_access(const char *zFilename, int flags){
#ifdef _WIN32
  char *zMbcs = fossil_utf8_to_mbcs(zFilename);
  int rc = access(zMbcs, flags);
  wchar_t *zMbcs = fossil_utf8_to_unicode(zFilename);
  int rc = _waccess(zMbcs, flags);
  fossil_mbcs_free(zMbcs);
#else
  int rc = access(zFilename, flags);
#endif
  return rc;
}

/*
** Find an unused filename similar to zBase with zSuffix appended.
**
** Make the name relative to the working directory if relFlag is true.

  return rc;
}

/*
** Delete a file.
*/
void file_delete(const char *zFilename){
#ifdef _WIN32
  char *z = fossil_utf8_to_mbcs(zFilename);
  unlink(z);
  wchar_t *z = fossil_utf8_to_unicode(zFilename);
  _wunlink(z);
  fossil_mbcs_free(z);
#else
  unlink(zFilename);
#endif
}

/*
** Create the directory named in the argument, if it does not already
** exist.  If forceFlag is 1, delete any prior non-directory object 
** with the same name.
**
** Return the number of errors.
*/
int file_mkdir(const char *zName, int forceFlag){
  int rc = file_wd_isdir(zName);
  if( rc==2 ){
    if( !forceFlag ) return 1;
    file_delete(zName);
  }
  if( rc!=1 ){
#if defined(_WIN32)
    int rc;
    char *zMbcs = fossil_utf8_to_mbcs(zName);
    rc = mkdir(zMbcs);
    wchar_t *zMbcs = fossil_utf8_to_unicode(zName);
    rc = _wmkdir(zMbcs);
    fossil_mbcs_free(zMbcs);
    return rc;
#else
    return mkdir(zName, 0755);
#endif
  }
  return 0;

    fossil_free(z);
  }
}

/*
** Get the current working directory.
**
** On windows, the name is converted from MBCS to UTF8 and all '\\'
** On windows, the name is converted from unicode to UTF8 and all '\\'
** characters are converted to '/'.  No conversions are needed on
** unix.
*/
void file_getcwd(char *zBuf, int nBuf){
#ifdef _WIN32
  char *zPwdUtf8;
  int nPwd;
  int i;
  char zPwd[2000];
  if( getcwd(zPwd, sizeof(zPwd)-1)==0 ){
  wchar_t zPwd[2000];
  if( _wgetcwd(zPwd, sizeof(zPwd)/sizeof(zPwd[0])-1)==0 ){
    fossil_fatal("cannot find the current working directory.");
  }
  zPwdUtf8 = fossil_mbcs_to_utf8(zPwd);
  zPwdUtf8 = fossil_unicode_to_utf8(zPwd);
  nPwd = strlen(zPwdUtf8);
  if( nPwd > nBuf-1 ){
    fossil_fatal("pwd too big: max %d\n", nBuf-1);
  }
  for(i=0; zPwdUtf8[i]; i++) if( zPwdUtf8[i]=='\\' ) zPwdUtf8[i] = '/';
  memcpy(zBuf, zPwdUtf8, nPwd+1);
  fossil_mbcs_free(zPwdUtf8);

    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    "0123456789";
  unsigned int i, j;
  const char *zDir = ".";
  int cnt = 0;

#if defined(_WIN32)
  char zTmpPath[MAX_PATH];
  wchar_t zTmpPath[MAX_PATH];

  if( GetTempPath(sizeof(zTmpPath), zTmpPath) ){
    azDirs[0] = zTmpPath;
  if( GetTempPathW(MAX_PATH, zTmpPath) ){
    azDirs[0] = fossil_unicode_to_utf8(zTmpPath);
  }

  azDirs[1] = fossil_getenv("TEMP");
  azDirs[2] = fossil_getenv("TMP");
#endif

  

    blob_read_from_file(&onDisk, zName);
  }
  rc = blob_compare(&onDisk, pContent);
  blob_reset(&onDisk);
  return rc==0;
}

/*
** Portable unicode implementation of opendir()
*/
#if INTERFACE

#if defined(_WIN32)
# include <dirent.h>
# define FOSSIL_DIR _WDIR
# define fossil_dirent _wdirent
# define fossil_opendir _wopendir
# define fossil_readdir _wreaddir
# define fossil_closedir _wclosedir
#else
# include <dirent.h>
# define FOSSIL_DIR DIR
# define fossil_dirent dirent
# define fossil_opendir opendir
# define fossil_readdir readdir
# define fossil_closedir closedir
#endif

#endif /* INTERFACE */



/**************************************************************************
** The following routines translate between MBCS and UTF8 on windows.
** Since everything is always UTF8 on unix, these routines are no-ops
** there.
*/

/*
** Translate MBCS to UTF8.  Return a pointer to the translated text.  
** Call fossil_mbcs_free() to deallocate any memory used to store the
** returned pointer when done.
*/
char *fossil_mbcs_to_utf8(const char *zMbcs){
#ifdef _WIN32
  extern char *sqlite3_win32_mbcs_to_utf8(const char*);
  return sqlite3_win32_mbcs_to_utf8(zMbcs);
#else
  return (char*)zMbcs;  /* No-op on unix */
#endif  
}

/*
** Translate Unicode to UTF8.  Return a pointer to the translated text.
** Call fossil_mbcs_free() to deallocate any memory used to store the
** returned pointer when done.
*/
char *fossil_unicode_to_utf8(const void *zUnicode){
#ifdef _WIN32
  int nByte = WideCharToMultiByte(CP_UTF8, 0, zUnicode, -1, 0, 0, 0, 0);
  char *zUtf = sqlite3_malloc( nByte );
  if( zUtf==0 ){
    return 0;
  }
  WideCharToMultiByte(CP_UTF8, 0, zUnicode, -1, zUtf, nByte, 0, 0);
  return zUtf;
#else
  return (char *)zUnicode;  /* No-op on unix */
#endif
}

/*
** Translate UTF8 to MBCS for use in system calls.  Return a pointer to the
** translated text..  Call fossil_mbcs_free() to deallocate any memory
** used to store the returned pointer when done.
*/
char *fossil_utf8_to_mbcs(const char *zUtf8){
#ifdef _WIN32
  extern char *sqlite3_win32_utf8_to_mbcs(const char*);
  return sqlite3_win32_utf8_to_mbcs(zUtf8);
#else
  return (char*)zUtf8;  /* No-op on unix */
#endif  
}

/*
** Translate UTF8 to unicode for use in system calls.  Return a pointer to the
** translated text..  Call fossil_mbcs_free() to deallocate any memory
** used to store the returned pointer when done.
*/
void *fossil_utf8_to_unicode(const char *zUtf8){
#ifdef _WIN32
  int nByte = MultiByteToWideChar(CP_UTF8, 0, zUtf8, -1, 0, 0);
  wchar_t *zUnicode = sqlite3_malloc( nByte * 2 );
  if( zUnicode==0 ){
    return 0;
  }
  MultiByteToWideChar(CP_UTF8, 0, zUtf8, -1, zUnicode, nByte);
  return zUnicode;
#else
  return (void *)zUtf8;  /* No-op on unix */
#endif
}

/*
** Return the value of an environment variable as UTF8.
*/
char *fossil_getenv(const char *zName){
  char *zValue = getenv(zName);
#ifdef _WIN32
  wchar_t *uName = fossil_utf8_to_unicode(zName);
  void *zValue = _wgetenv(uName);
  fossil_mbcs_free(uName);
  if( zValue ) zValue = fossil_mbcs_to_utf8(zValue);
  if( zValue ) zValue = fossil_unicode_to_utf8(zValue);
#else
  char *zValue = getenv(zName);
#endif
  return zValue;
}

/*
** Translate UTF8 to MBCS for display on the console.  Return a pointer to the
** translated text..  Call fossil_mbcs_free() to deallocate any memory

#endif  
}

/*
** Translate MBCS to UTF8.  Return a pointer.  Call fossil_mbcs_free()
** to deallocate any memory used to store the returned pointer when done.
*/
void fossil_mbcs_free(char *zOld){
void fossil_mbcs_free(void *zOld){
#ifdef _WIN32
  extern void sqlite3_free(void*);
  sqlite3_free(zOld);
#else
  /* No-op on unix */
#endif  
}

/*
** Like fopen() but always takes a UTF8 argument.
*/
FILE *fossil_fopen(const char *zName, const char *zMode){
#ifdef _WIN32
  char *zMbcs = fossil_utf8_to_mbcs(zName);
  FILE *f = fopen(zMbcs, zMode);
  fossil_mbcs_free(zMbcs);
  wchar_t *uMode = fossil_utf8_to_unicode(zMode);
  wchar_t *uName = fossil_utf8_to_unicode(zName);
  FILE *f = _wfopen(uName, uMode);
  fossil_mbcs_free(uName);
  fossil_mbcs_free(uMode);
#else
  FILE *f = fopen(zName, zMode);
#endif
  return f;
}

/*
** Copyright (c) 2010 D. Richard Hipp
** Copyright © 2010 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

  find_option("git",0,0);  /* Skip the --git option for now */
  verify_all_options();
  if( g.argc!=3  && g.argc!=4 ){
    usage("REPOSITORY-NAME");
  }
  if( g.argc==4 ){
    pIn = fopen(g.argv[3], "rb");
    pIn = fossil_fopen(g.argv[3], "rb");
  }else{
    pIn = stdin;
    fossil_binary_mode(pIn);
  }
  if( !incrFlag ){
    if( forceFlag ) file_delete(g.argv[2]);
    db_create_repository(g.argv[2]);

**
**   --nochange | -n         Dryrun:  do not actually make any changes; just
**                           show what would have happened.
**
**   --case-sensitive BOOL   Overwrite the case-sensitive setting.  If false,
**                           files whose names differ only in case are taken
**                           to be the same file.
**
**   --force | -f            Force the merge even if it would be a no-op.
*/
void merge_cmd(void){
  int vid;              /* Current version "V" */
  int mid;              /* Version we are merging from "M" */
  int pid;              /* The pivot version - most recent common ancestor P */
  int detailFlag;       /* True if the --detail option is present */
  int pickFlag;         /* True if the --cherrypick option is present */
  int backoutFlag;      /* True if the --backout option is present */
  int nochangeFlag;     /* True if the --nochange or -n option is present */
  int forceFlag;        /* True if the --force or -f option is present */
  const char *zBinGlob; /* The value of --binary */
  const char *zPivot;   /* The value of --baseline */
  int debugFlag;        /* True if --debug is present */
  int nChng;            /* Number of file name changes */
  int *aChng;           /* An array of file name changes */
  int i;                /* Loop counter */
  int nConflict = 0;    /* Number of conflicts seen */

  undo_capture_command_line();
  detailFlag = find_option("detail",0,0)!=0;
  pickFlag = find_option("cherrypick",0,0)!=0;
  backoutFlag = find_option("backout",0,0)!=0;
  debugFlag = find_option("debug",0,0)!=0;
  zBinGlob = find_option("binary",0,1);
  nochangeFlag = find_option("nochange","n",0)!=0;
  forceFlag = find_option("force","f",0)!=0;
  zPivot = find_option("baseline",0,1);
  capture_case_sensitive_option();
  if( g.argc!=3 ){
    usage("VERSION");
  }
  db_must_be_within_tree();
  caseSensitive = filenames_are_case_sensitive();

    int t = pid;
    pid = mid;
    mid = t;
  }
  if( !is_a_version(pid) ){
    fossil_fatal("not a version: record #%d", pid);
  }
  if( mid==pid ){
    fossil_print("This merge is a no-op.\n");
  if( !forceFlag && (mid==pid || vid==pid || mid==vid) ){
    fossil_print("Merge skipped because it is a no-op. "
                 " Use --force to override.\n");
    return;
  }
  if( detailFlag ){
    print_checkin_description(mid, 12, "merge-from:");
    print_checkin_description(pid, 12, "baseline:");
  }
  vfile_check_signature(vid, 1, 0);

/*
** Copyright (c) 2007 D. Richard Hipp
** Copyright © 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/
**
*******************************************************************************
**
** This file contains code used to rebuild the database.
*/
#include "config.h"
#include "rebuild.h"
#include <assert.h>
#include <dirent.h>
#include <errno.h>

/*
** Make changes to the stable part of the schema (the part that is not
** simply deleted and reconstructed on a rebuild) to bring the schema
** up to the latest.
*/

}

/*
** Recursively read all files from the directory zPath and install
** every file read as a new artifact in the repository.
*/
void recon_read_dir(char *zPath){
  DIR *d;
  struct dirent *pEntry;
  FOSSIL_DIR *d;
  struct fossil_dirent *pEntry;
  Blob aContent; /* content of the just read artifact */
  static int nFileRead = 0;
  char *zMbcsPath;
  void *zUnicodePath;
  char *zUtf8Name;

  zMbcsPath = fossil_utf8_to_mbcs(zPath);
  d = opendir(zMbcsPath);
  zUnicodePath = fossil_utf8_to_unicode(zPath);
  d = fossil_opendir(zUnicodePath);
  if( d ){
    while( (pEntry=readdir(d))!=0 ){
    while( (pEntry=fossil_readdir(d))!=0 ){
      Blob path;
      char *zSubpath;

      if( pEntry->d_name[0]=='.' ){
        continue;
      }
      zUtf8Name = fossil_mbcs_to_utf8(pEntry->d_name);
      zUtf8Name = fossil_unicode_to_utf8(pEntry->d_name);
      zSubpath = mprintf("%s/%s", zPath, zUtf8Name);
      fossil_mbcs_free(zUtf8Name);
      if( file_isdir(zSubpath)==1 ){
        recon_read_dir(zSubpath);
      }
      blob_init(&path, 0, 0);
      blob_appendf(&path, "%s", zSubpath);
      if( blob_read_from_file(&aContent, blob_str(&path))==-1 ){
        fossil_panic("some unknown error occurred while reading \"%s\"", 
                     blob_str(&path));
      }
      content_put(&aContent);
      blob_reset(&path);
      blob_reset(&aContent);
      free(zSubpath);
      fossil_print("\r%d", ++nFileRead);
      fflush(stdout);
    }
    closedir(d);
    fossil_closedir(d);
  }else {
    fossil_panic("encountered error %d while trying to open \"%s\".",
                  errno, g.argv[3]);
  }
  fossil_mbcs_free(zMbcsPath);
  fossil_mbcs_free(zUnicodePath);
}

/*
** COMMAND: reconstruct*
**
** Usage: %fossil reconstruct FILENAME DIRECTORY
**

/*
** Copyright (c) 2007 D. Richard Hipp
** Copyright © 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

**
** Procedures for managing the VFILE table.
*/
#include "config.h"
#include "vfile.h"
#include <assert.h>
#include <sys/types.h>
#if defined(__DMC__)
#include "dirent.h"
#else
#include <dirent.h>
#endif

/*
** The input is guaranteed to be a 40-character well-formed UUID.
** Find its rid.
*/
int fast_uuid_to_rid(const char *zUuid){
  static Stmt q;

** Files whose names begin with "." are omitted unless allFlag is true.
**
** Any files or directories that match the glob pattern pIgnore are 
** excluded from the scan.  Name matching occurs after the first
** nPrefix characters are elided from the filename.
*/
void vfile_scan(Blob *pPath, int nPrefix, int allFlag, Glob *pIgnore){
  DIR *d;
  FOSSIL_DIR *d;
  int origSize;
  const char *zDir;
  struct dirent *pEntry;
  struct fossil_dirent *pEntry;
  int skipAll = 0;
  static Stmt ins;
  static int depth = 0;
  char *zMbcs;
  void *zMbcs;

  origSize = blob_size(pPath);
  if( pIgnore ){
    blob_appendf(pPath, "/");
    if( glob_match(pIgnore, &blob_str(pPath)[nPrefix+1]) ) skipAll = 1;
    blob_resize(pPath, origSize);
  }
  if( skipAll ) return;

  if( depth==0 ){
    db_prepare(&ins,
       "INSERT OR IGNORE INTO sfile(x) SELECT :file"
       "  WHERE NOT EXISTS(SELECT 1 FROM vfile WHERE pathname=:file)"
    );
  }
  depth++;

  zDir = blob_str(pPath);
  zMbcs = fossil_utf8_to_mbcs(zDir);
  d = opendir(zMbcs);
  zMbcs = fossil_utf8_to_unicode(zDir);
  d = fossil_opendir(zMbcs);
  if( d ){
    while( (pEntry=readdir(d))!=0 ){
    while( (pEntry=fossil_readdir(d))!=0 ){
      char *zPath;
      char *zUtf8;
      if( pEntry->d_name[0]=='.' ){
        if( !allFlag ) continue;
        if( pEntry->d_name[1]==0 ) continue;
        if( pEntry->d_name[1]=='.' && pEntry->d_name[2]==0 ) continue;
      }
      zUtf8 = fossil_mbcs_to_utf8(pEntry->d_name);
      zUtf8 = fossil_unicode_to_utf8(pEntry->d_name);
      blob_appendf(pPath, "/%s", zUtf8);
      fossil_mbcs_free(zUtf8);
      zPath = blob_str(pPath);
      if( glob_match(pIgnore, &zPath[nPrefix+1]) ){
        /* do nothing */
      }else if( file_wd_isdir(zPath)==1 ){
        if( !vfile_top_of_checkout(zPath) ){
          vfile_scan(pPath, nPrefix, allFlag, pIgnore);
        }
      }else if( file_wd_isfile_or_link(zPath) ){
        db_bind_text(&ins, ":file", &zPath[nPrefix+1]);
        db_step(&ins);
        db_reset(&ins);
      }
      blob_resize(pPath, origSize);
    }
    closedir(d);
    fossil_closedir(d);
  }
  fossil_mbcs_free(zMbcs);

  depth--;
  if( depth==0 ){
    db_finalize(&ins);
  }

#define DIRENT_H

#include <windows.h>
#include <string.h>
#include <assert.h>


typedef struct dirent
typedef struct _wdirent
{
   char d_name[MAX_PATH + 1]; /* current dir entry (multi-byte char string) */
   WIN32_FIND_DATAA data;     /* file attributes */
}  dirent;
   wchar_t d_name[MAX_PATH + 1]; /* current dir entry (unicode char string) */
   WIN32_FIND_DATAW data;     /* file attributes */
}  _wdirent;


typedef struct DIR
typedef struct _WDIR
{
   dirent current;            /* Current directory entry */
   _wdirent current;            /* Current directory entry */
   int    cached;             /* Indicates un-processed entry in memory */
   HANDLE search_handle;      /* File search handle */
   char   patt[MAX_PATH + 3]; /* search pattern (3 = pattern + "\\*\0") */
} DIR;
   wchar_t   patt[MAX_PATH + 3]; /* search pattern (3 = pattern + "\\*\0") */
} _WDIR;


/* Forward declarations */
static DIR *opendir (const char *dirname);
static struct dirent *readdir (DIR *dirp);
static int closedir (DIR *dirp);
static _WDIR *_wopendir (const wchar_t *dirname);
static struct _wdirent *_wreaddir (_WDIR *dirp);
static int _wclosedir (_WDIR *dirp);
static void rewinddir(DIR* dirp);


/* Use the new safe string functions introduced in Visual Studio 2005 */
#if defined(_MSC_VER) && _MSC_VER >= 1400
# define STRNCPY(dest,src,size) strncpy_s((dest),(size),(src),_TRUNCATE)
# define STRNCPY(dest,src,size) wcsncpy_s((dest),(size),(src),_TRUNCATE)
#else
# define STRNCPY(dest,src,size) strncpy((dest),(src),(size))
# define STRNCPY(dest,src,size) wcsncpy((dest),(src),(size))
#endif


/*****************************************************************************
 * Open directory stream DIRNAME for read and return a pointer to the
 * internal working area that is used to retrieve individual directory
 * entries.
 */
static DIR *opendir(const char *dirname)
static _WDIR *_wopendir(const wchar_t *dirname)
{
   DIR *dirp;
   _WDIR *dirp;
   assert (dirname != NULL);
   assert (strlen (dirname) < MAX_PATH);
   assert (wcslen (dirname) < MAX_PATH);

   /* construct new DIR structure */
   dirp = (DIR*) malloc (sizeof (struct DIR));
   /* construct new _WDIR structure */
   dirp = (_WDIR*) malloc (sizeof (struct _WDIR));
   if (dirp != NULL) {
      char *p;
      wchar_t *p;

      /* take directory name... */
      STRNCPY (dirp->patt, dirname, sizeof(dirp->patt));
      dirp->patt[MAX_PATH] = '\0';

      /* ... and append search pattern to it */
      p = strchr (dirp->patt, '\0');
      p = wcschr (dirp->patt, '\0');
      if (dirp->patt < p  &&  *(p-1) != '\\'  &&  *(p-1) != ':') {
         *p++ = '\\';
      }
      *p++ = '*';
      *p = '\0';

      /* open stream and retrieve first file */
      dirp->search_handle = FindFirstFileA (dirp->patt, &dirp->current.data);
      dirp->search_handle = FindFirstFileW (dirp->patt, &dirp->current.data);
      if (dirp->search_handle == INVALID_HANDLE_VALUE) {
         /* invalid search pattern? */
         free (dirp);
         return NULL;
      }

      /* there is an un-processed directory entry in memory now */

/*****************************************************************************
 * Read a directory entry, and return a pointer to a dirent structure
 * containing the name of the entry in d_name field.  Individual directory
 * entries returned by this very function include regular files,
 * sub-directories, pseudo-directories "." and "..", but also volume labels,
 * hidden files and system files may be returned.
 */
static struct dirent *readdir(DIR *dirp)
static struct _wdirent *_wreaddir(_WDIR *dirp)
{
   assert (dirp != NULL);

   if (dirp->search_handle == INVALID_HANDLE_VALUE) {
      /* directory stream was opened/rewound incorrectly or ended normally */
      return NULL;
   }

   /* get next directory entry */
   if (dirp->cached != 0) {
      /* a valid directory entry already in memory */
      dirp->cached = 0;
   } else {
      /* read next directory entry from disk */
      if (FindNextFileA (dirp->search_handle, &dirp->current.data) == FALSE) {
      if (FindNextFileW (dirp->search_handle, &dirp->current.data) == FALSE) {
         /* the very last file has been processed or an error occured */
         FindClose (dirp->search_handle);
         dirp->search_handle = INVALID_HANDLE_VALUE;
         return NULL;
      }
   }

/*****************************************************************************
 * Close directory stream opened by opendir() function.  Close of the
 * directory stream invalidates the DIR structure as well as any previously
 * read directory entry.
 */
static int closedir(DIR *dirp)
static int _wclosedir(_WDIR *dirp)
{
   assert (dirp != NULL);

   /* release search handle */
   if (dirp->search_handle != INVALID_HANDLE_VALUE) {
      FindClose (dirp->search_handle);
      dirp->search_handle = INVALID_HANDLE_VALUE;
   }

   /* release directory handle */
   free (dirp);
   return 0;
}


/*****************************************************************************
 * Resets the position of the directory stream to which dirp refers to the
 * beginning of the directory. It also causes the directory stream to refer
 * to the current state of the corresponding directory, as a call to opendir()
 * would have done. If dirp does not refer to a directory stream, the effect
 * is undefined.
 */
static void rewinddir(DIR* dirp)
{
   /* release search handle */
   if (dirp->search_handle != INVALID_HANDLE_VALUE) {
      FindClose (dirp->search_handle);
      dirp->search_handle = INVALID_HANDLE_VALUE;
   }

   /* open new search handle and retrieve first file */
   dirp->search_handle = FindFirstFileA (dirp->patt, &dirp->current.data);
   if (dirp->search_handle == INVALID_HANDLE_VALUE) {
      /* invalid search pattern? */
      free (dirp);
      return;
   }

   /* there is an un-processed directory entry in memory now */
   dirp->cached = 1;
}


#endif /*DIRENT_H*/