Fossil

#if defined(_WIN32)
  const char cQuote = '"';    /* Use "..." quoting on windows */
#else
  const char cQuote = '\'';   /* Use '...' quoting on unix */
#endif

  for(i=0; (c = zIn[i])!=0; i++){

    if( c==cQuote || c=='\\' || c<' ' || c==';' || c=='*' || c=='?' || c=='[') {
      Blob bad;
      blob_token(pBlob, &bad);
      fossil_fatal("the [%s] argument to the \"%s\" command contains "
                   "a character (ascii 0x%02x) that is a security risk",
                   zIn, blob_str(&bad), c);
    }
    if( !needEscape && !fossil_isalnum(c) && c!='/' && c!='.' && c!='_' ){

#if defined(_WIN32)
  const char cQuote = '"';    /* Use "..." quoting on windows */
#else
  const char cQuote = '\'';   /* Use '...' quoting on unix */
#endif

  for(i=0; (c = zIn[i])!=0; i++){
    if( c==cQuote || (unsigned char)c<' ' ||
        c=='\\' || c==';' || c=='*' || c=='?' || c=='[' ){
      Blob bad;
      blob_token(pBlob, &bad);
      fossil_fatal("the [%s] argument to the \"%s\" command contains "
                   "a character (ascii 0x%02x) that is a security risk",
                   zIn, blob_str(&bad), c);
    }
    if( !needEscape && !fossil_isalnum(c) && c!='/' && c!='.' && c!='_' ){

      if( html ) blob_appendf(pOut, "<span class=\"diffln\">");
      /*
       * If the patch changes an empty file or results in an empty file,
       * the block header must use 0,0 as position indicator and not 1,0.
       * Otherwise, patch would be confused and may reject the diff.
       */
      blob_appendf(pOut,"@@ -%d,%d +%d,%d @@",
        na ? a+skip+1 : 0, na,
        nb ? b+skip+1 : 0, nb);
      if( html ) blob_appendf(pOut, "</span>");
      blob_append(pOut, "\n", 1);
    }

    /* Show the initial common area */
    a += skip;
    b += skip;

      if( html ) blob_appendf(pOut, "<span class=\"diffln\">");
      /*
       * If the patch changes an empty file or results in an empty file,
       * the block header must use 0,0 as position indicator and not 1,0.
       * Otherwise, patch would be confused and may reject the diff.
       */
      blob_appendf(pOut,"@@ -%d,%d +%d,%d @@",
        na ? a+skip+1 : a+skip, na,
        nb ? b+skip+1 : b+skip, nb);
      if( html ) blob_appendf(pOut, "</span>");
      blob_append(pOut, "\n", 1);
    }

    /* Show the initial common area */
    a += skip;
    b += skip;

#define OBJTYPE_FORUM      0x0200

/*
** Possible flags for the second parameter to
** object_description()
*/
#define OBJDESC_DETAIL      0x0001   /* more detail */

#endif

/*
** Write a description of an object to the www reply.
**
** If the object is a file then mention:
**
................................................................................
  Stmt q;
  int cnt = 0;
  int nWiki = 0;
  int objType = 0;
  char *zUuid = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", rid);
  int showDetail = (objdescFlags & OBJDESC_DETAIL)!=0;
  char *prevName = 0;


  db_prepare(&q,
    "SELECT filename.name, datetime(event.mtime,toLocal()),"
    "       coalesce(event.ecomment,event.comment),"
    "       coalesce(event.euser,event.user),"
    "       b.uuid, mlink.mperm,"
    "       coalesce((SELECT value FROM tagxref"
................................................................................
        @ <li>Symbolic link
        objType |= OBJTYPE_SYMLINK;
      }else if( mPerm==PERM_EXE ){
        @ <li>Executable file
        objType |= OBJTYPE_EXE;
      }else{
        @ <li>File




      }
      objType |= OBJTYPE_CONTENT;
      @ %z(href("%R/finfo?name=%T&m=%!S",zName,zUuid))%h(zName)</a>
      tag_private_status(rid);
      if( showDetail ){
        @ <ul>
      }
................................................................................
  const char *zMime;
  Blob downloadName;
  int renderAsWiki = 0;
  int renderAsHtml = 0;
  int objType;
  int asText;
  const char *zUuid;
  u32 objdescFlags = 0;
  int descOnly = fossil_strcmp(g.zPath,"whatis")==0;
  int isFile = fossil_strcmp(g.zPath,"file")==0;
  const char *zLn = P("ln");
  const char *zName = P("name");
  HQuery url;

  url_initialize(&url, g.zPath);
................................................................................
    style_submenu_element("Artifact", "%R/artifact/%S", zUuid);
  }else if( g.perm.Setup ){
    @ <h2>Artifact %s(zUuid) (%d(rid)):</h2>
  }else{
    @ <h2>Artifact %s(zUuid):</h2>
  }
  blob_zero(&downloadName);


  objType = object_description(rid, objdescFlags, &downloadName);
  if( !descOnly && P("download")!=0 ){
    cgi_redirectf("%R/raw/%T?name=%s", blob_str(&downloadName),
          db_text("?", "SELECT uuid FROM blob WHERE rid=%d", rid));
    /*NOTREACHED*/
  }
  if( g.perm.Admin ){
................................................................................
    db_finalize(&q);
  }
  style_submenu_element("Download", "%R/raw/%T?name=%s",
                         blob_str(&downloadName), zUuid);
  if( db_exists("SELECT 1 FROM mlink WHERE fid=%d", rid) ){
    style_submenu_element("Check-ins Using", "%R/timeline?n=200&uf=%s", zUuid);
  }
  asText = P("txt")!=0;
  zMime = mimetype_from_name(blob_str(&downloadName));
  if( zMime ){
    if( fossil_strcmp(zMime, "text/html")==0 ){
      if( asText ){
        style_submenu_element("Html", "%s", url_render(&url, "txt", 0, 0, 0));
      }else{
        renderAsHtml = 1;
................................................................................
          output_text_with_line_numbers(z, zLn);
        }else{
          @ <pre>
          @ %h(z)
          @ </pre>
        }
      }else if( strncmp(zMime, "image/", 6)==0 ){
        @ <i>(file is %d(blob_size(&content)) bytes of image data)</i><br />
        @ <img src="%R/raw/%s(zUuid)?m=%s(zMime)" />
        style_submenu_element("Image", "%R/raw/%s?m=%s", zUuid, zMime);
      }else{
        @ <i>(file is %d(blob_size(&content)) bytes of binary data)</i>
      }
      @ </blockquote>
    }
  }
................................................................................
  if( fHide && !fHasHidden ) hide_branch();
  if( fClose && !fHasClosed ) close_leaf(rid);
  if( zNewBranch && zNewBranch[0] ) change_branch(rid,zNewBranch);
  apply_newtags(&ctrl, rid, zUuid, zUserOvrd, fDryRun);
  if( fDryRun==0 ){
    show_common_info(rid, "uuid:", 1, 0);
  }


}

#define OBJTYPE_FORUM      0x0200

/*
** Possible flags for the second parameter to
** object_description()
*/
#define OBJDESC_DETAIL      0x0001   /* more detail */
#define OBJDESC_BASE        0x0002   /* Set <base> using this object */
#endif

/*
** Write a description of an object to the www reply.
**
** If the object is a file then mention:
**
................................................................................
  Stmt q;
  int cnt = 0;
  int nWiki = 0;
  int objType = 0;
  char *zUuid = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", rid);
  int showDetail = (objdescFlags & OBJDESC_DETAIL)!=0;
  char *prevName = 0;
  int bNeedBase = (objdescFlags & OBJDESC_BASE)!=0;

  db_prepare(&q,
    "SELECT filename.name, datetime(event.mtime,toLocal()),"
    "       coalesce(event.ecomment,event.comment),"
    "       coalesce(event.euser,event.user),"
    "       b.uuid, mlink.mperm,"
    "       coalesce((SELECT value FROM tagxref"
................................................................................
        @ <li>Symbolic link
        objType |= OBJTYPE_SYMLINK;
      }else if( mPerm==PERM_EXE ){
        @ <li>Executable file
        objType |= OBJTYPE_EXE;
      }else{
        @ <li>File
        if( bNeedBase ){
          bNeedBase = 0;
          style_set_current_page("doc/%S/%s",zVers,zName);
        }
      }
      objType |= OBJTYPE_CONTENT;
      @ %z(href("%R/finfo?name=%T&m=%!S",zName,zUuid))%h(zName)</a>
      tag_private_status(rid);
      if( showDetail ){
        @ <ul>
      }
................................................................................
  const char *zMime;
  Blob downloadName;
  int renderAsWiki = 0;
  int renderAsHtml = 0;
  int objType;
  int asText;
  const char *zUuid;
  u32 objdescFlags = OBJDESC_BASE;
  int descOnly = fossil_strcmp(g.zPath,"whatis")==0;
  int isFile = fossil_strcmp(g.zPath,"file")==0;
  const char *zLn = P("ln");
  const char *zName = P("name");
  HQuery url;

  url_initialize(&url, g.zPath);
................................................................................
    style_submenu_element("Artifact", "%R/artifact/%S", zUuid);
  }else if( g.perm.Setup ){
    @ <h2>Artifact %s(zUuid) (%d(rid)):</h2>
  }else{
    @ <h2>Artifact %s(zUuid):</h2>
  }
  blob_zero(&downloadName);
  asText = P("txt")!=0;
  if( asText ) objdescFlags &= ~OBJDESC_BASE;
  objType = object_description(rid, objdescFlags, &downloadName);
  if( !descOnly && P("download")!=0 ){
    cgi_redirectf("%R/raw/%T?name=%s", blob_str(&downloadName),
          db_text("?", "SELECT uuid FROM blob WHERE rid=%d", rid));
    /*NOTREACHED*/
  }
  if( g.perm.Admin ){
................................................................................
    db_finalize(&q);
  }
  style_submenu_element("Download", "%R/raw/%T?name=%s",
                         blob_str(&downloadName), zUuid);
  if( db_exists("SELECT 1 FROM mlink WHERE fid=%d", rid) ){
    style_submenu_element("Check-ins Using", "%R/timeline?n=200&uf=%s", zUuid);
  }

  zMime = mimetype_from_name(blob_str(&downloadName));
  if( zMime ){
    if( fossil_strcmp(zMime, "text/html")==0 ){
      if( asText ){
        style_submenu_element("Html", "%s", url_render(&url, "txt", 0, 0, 0));
      }else{
        renderAsHtml = 1;
................................................................................
          output_text_with_line_numbers(z, zLn);
        }else{
          @ <pre>
          @ %h(z)
          @ </pre>
        }
      }else if( strncmp(zMime, "image/", 6)==0 ){
        @ <p>(file is %d(blob_size(&content)) bytes of image data)</i></p>
        @ <p><img src="%R/raw/%s(zUuid)?m=%s(zMime)"></p>
        style_submenu_element("Image", "%R/raw/%s?m=%s", zUuid, zMime);
      }else{
        @ <i>(file is %d(blob_size(&content)) bytes of binary data)</i>
      }
      @ </blockquote>
    }
  }
................................................................................
  if( fHide && !fHasHidden ) hide_branch();
  if( fClose && !fHasClosed ) close_leaf(rid);
  if( zNewBranch && zNewBranch[0] ) change_branch(rid,zNewBranch);
  apply_newtags(&ctrl, rid, zUuid, zUserOvrd, fDryRun);
  if( fDryRun==0 ){
    show_common_info(rid, "uuid:", 1, 0);
  }
  if( g.localOpen ){
    manifest_to_disk(rid);
  }
}

*/
static int totalSize;       /* Total number of artifacts to process */
static int processCnt;      /* Number processed so far */
static int ttyOutput;       /* Do progress output */
static Bag bagDone;         /* Bag of records rebuilt */

static char *zFNameFormat;  /* Format string for filenames on deconstruct */


static int prefixLength;    /* Length of directory prefix for deconstruct */



/*
** Draw the percent-complete message.
** The input is actually the permill complete.
*/
static void percent_complete(int permill){
................................................................................
      manifest_crosslink(rid, pUse, MC_NONE);
    }else{
      /* We are doing "fossil deconstruct" */
      char *zUuid = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", rid);
      char *zFile = mprintf(zFNameFormat /*works-like:"%s:%s"*/,
                            zUuid, zUuid+prefixLength);
      blob_write_to_file(pUse,zFile);











      free(zFile);
      free(zUuid);
      blob_reset(pUse);
    }
    assert( blob_is_reset(pUse) );
    rebuild_step_done(rid);

................................................................................
void recon_read_dir(char *zPath){
  DIR *d;
  struct dirent *pEntry;
  Blob aContent; /* content of the just read artifact */
  static int nFileRead = 0;
  void *zUnicodePath;
  char *zUtf8Name;








































  zUnicodePath = fossil_utf8_to_path(zPath, 1);
  d = opendir(zUnicodePath);
  if( d ){
    while( (pEntry=readdir(d))!=0 ){
      Blob path;
      char *zSubpath;

................................................................................
      if( (pEntry->d_type==DT_UNKNOWN || pEntry->d_type==DT_LNK)
          ? (file_isdir(zSubpath, ExtFILE)==1) : (pEntry->d_type==DT_DIR) )
#else
      if( file_isdir(zSubpath, ExtFILE)==1 )
#endif
      {
        recon_read_dir(zSubpath);
      }else{
        blob_init(&path, 0, 0);
        blob_appendf(&path, "%s", zSubpath);
        if( blob_read_from_file(&aContent, blob_str(&path), ExtFILE)==-1 ){
          fossil_fatal("some unknown error occurred while reading \"%s\"",
                       blob_str(&path));
        }

        content_put(&aContent);

        blob_reset(&path);
        blob_reset(&aContent);
        fossil_print("\r%d", ++nFileRead);
        fflush(stdout);
      }
      free(zSubpath);
    }
    closedir(d);
  }else {
    fossil_fatal("encountered error %d while trying to open \"%s\".",
                  errno, g.argv[3]);
  }
  fossil_path_free(zUnicodePath);


}






































































































/*
** COMMAND: reconstruct*
**
** Usage: %fossil reconstruct FILENAME DIRECTORY
**
** This command studies the artifacts (files) in DIRECTORY and
** reconstructs the fossil record from them. It places the new
** fossil repository in FILENAME. Subdirectories are read, files
** with leading '.' in the filename are ignored.
**




** See also: deconstruct, rebuild
*/
void reconstruct_cmd(void) {
  char *zPassword;

  if( g.argc!=4 ){
    usage("FILENAME DIRECTORY");
  }
  if( file_isdir(g.argv[3], ExtFILE)!=1 ){
    fossil_print("\"%s\" is not a directory\n\n", g.argv[3]);
    usage("FILENAME DIRECTORY");
  }
................................................................................
** writes all artifacts to the file system. The DESTINATION directory
** will be populated with subdirectories AA and files AA/BBBBBBBBB.., where
** AABBBBBBBBB.. is the 40+ character artifact ID, AA the first 2 characters.
** If -L|--prefixlength is given, the length (default 2) of the directory
** prefix can be set to 0,1,..,9 characters.
**
** Options:
**   -R|--repository REPOSITORY  deconstruct given REPOSITORY


**   -L|--prefixlength N         set the length of the names of the DESTINATION
**                               subdirectories to N
**   --private                   Include private artifacts.
**
** See also: rebuild, reconstruct
*/
void deconstruct_cmd(void){
  const char *zDestDir;
  const char *zPrefixOpt;
  Stmt        s;
  int privateFlag;


  /* get and check prefix length argument and build format string */
  zPrefixOpt=find_option("prefixlength","L",1);
  if( !zPrefixOpt ){
    prefixLength = 2;
  }else{
    if( zPrefixOpt[0]>='0' && zPrefixOpt[0]<='9' && !zPrefixOpt[1] ){
      prefixLength = (int)(*zPrefixOpt-'0');
................................................................................
  */
#endif
  if( prefixLength ){
    zFNameFormat = mprintf("%s/%%.%ds/%%s",zDestDir,prefixLength);
  }else{
    zFNameFormat = mprintf("%s/%%s",zDestDir);
  }


  bag_init(&bagDone);
  ttyOutput = 1;
  processCnt = 0;
  if (!g.fQuiet) {
    fossil_print("0 (0%%)...\r");
    fflush(stdout);

*/
static int totalSize;       /* Total number of artifacts to process */
static int processCnt;      /* Number processed so far */
static int ttyOutput;       /* Do progress output */
static Bag bagDone;         /* Bag of records rebuilt */

static char *zFNameFormat;  /* Format string for filenames on deconstruct */
static int cchFNamePrefix;  /* Length of directory prefix in zFNameFormat */
static char *zDestDir;      /* Destination directory on deconstruct */
static int prefixLength;    /* Length of directory prefix for deconstruct */
static int fKeepRid1;       /* Flag to preserve RID=1 on de- and reconstruct */


/*
** Draw the percent-complete message.
** The input is actually the permill complete.
*/
static void percent_complete(int permill){
................................................................................
      manifest_crosslink(rid, pUse, MC_NONE);
    }else{
      /* We are doing "fossil deconstruct" */
      char *zUuid = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", rid);
      char *zFile = mprintf(zFNameFormat /*works-like:"%s:%s"*/,
                            zUuid, zUuid+prefixLength);
      blob_write_to_file(pUse,zFile);
      if( rid==1 && fKeepRid1!=0 ){
        char *zFnDotRid1 = mprintf("%s/.rid1", zDestDir);
        char *zFnRid1 = zFile + cchFNamePrefix + 1; /* Skip directory slash */
        Blob bFileContents = empty_blob;
        blob_appendf(&bFileContents,
          "# The file holding the artifact with RID=1\n"
          "%s\n", zFnRid1);
        blob_write_to_file(&bFileContents, zFnDotRid1);
        blob_reset(&bFileContents);
        free(zFnDotRid1);
      }
      free(zFile);
      free(zUuid);
      blob_reset(pUse);
    }
    assert( blob_is_reset(pUse) );
    rebuild_step_done(rid);

................................................................................
void recon_read_dir(char *zPath){
  DIR *d;
  struct dirent *pEntry;
  Blob aContent; /* content of the just read artifact */
  static int nFileRead = 0;
  void *zUnicodePath;
  char *zUtf8Name;
  static int recursionLevel = 0;  /* Bookkeeping about the recursion level */
  static char *zFnRid1 = 0;       /* The file holding the artifact with RID=1 */
  static int cchPathInitial = 0;  /* The length of zPath on first recursion */

  recursionLevel++;
  if( recursionLevel==1 ){
    cchPathInitial = strlen(zPath);
    if( fKeepRid1!=0 ){
      char *zFnDotRid1 = mprintf("%s/.rid1", zPath);
      Blob bFileContents;
      if( blob_read_from_file(&bFileContents, zFnDotRid1, ExtFILE)!=-1 ){
        Blob line, value;
        while( blob_line(&bFileContents, &line)>0 ){
          if( blob_token(&line, &value)==0 ) continue;  /* Empty line */
          if( blob_buffer(&value)[0]=='#' ) continue;   /* Comment */
          blob_trim(&value);
          zFnRid1 = mprintf("%s/%s", zPath, blob_str(&value));
          break;
        }
        blob_reset(&bFileContents);
        if( zFnRid1 ){
          if( blob_read_from_file(&aContent, zFnRid1, ExtFILE)==-1 ){
            fossil_fatal("some unknown error occurred while reading \"%s\"",
                         zFnRid1);
          }else{
            recon_set_hash_policy(0, zFnRid1);
            content_put(&aContent);
            recon_restore_hash_policy();
            blob_reset(&aContent);
            fossil_print("\r%d", ++nFileRead);
            fflush(stdout);
          }
        }else{
          fossil_fatal("an error occurred while reading or parsing \"%s\"",
                       zFnDotRid1);
        }
      }
      free(zFnDotRid1);
    }
  }
  zUnicodePath = fossil_utf8_to_path(zPath, 1);
  d = opendir(zUnicodePath);
  if( d ){
    while( (pEntry=readdir(d))!=0 ){
      Blob path;
      char *zSubpath;

................................................................................
      if( (pEntry->d_type==DT_UNKNOWN || pEntry->d_type==DT_LNK)
          ? (file_isdir(zSubpath, ExtFILE)==1) : (pEntry->d_type==DT_DIR) )
#else
      if( file_isdir(zSubpath, ExtFILE)==1 )
#endif
      {
        recon_read_dir(zSubpath);
      }else if( fossil_strcmp(zSubpath, zFnRid1)!=0 ){
        blob_init(&path, 0, 0);
        blob_appendf(&path, "%s", zSubpath);
        if( blob_read_from_file(&aContent, blob_str(&path), ExtFILE)==-1 ){
          fossil_fatal("some unknown error occurred while reading \"%s\"",
                       blob_str(&path));
        }
        recon_set_hash_policy(cchPathInitial, blob_str(&path));
        content_put(&aContent);
        recon_restore_hash_policy();
        blob_reset(&path);
        blob_reset(&aContent);
        fossil_print("\r%d", ++nFileRead);
        fflush(stdout);
      }
      free(zSubpath);
    }
    closedir(d);
  }else {
    fossil_fatal("encountered error %d while trying to open \"%s\".",
                  errno, g.argv[3]);
  }
  fossil_path_free(zUnicodePath);
  if( recursionLevel==1 && zFnRid1!=0 ) free(zFnRid1);
  recursionLevel--;
}

/*
** Helper functions called from recon_read_dir() to set and restore the correct
** hash policy for an artifact read from disk, inferred from the length of the
** path name.
*/
static int saved_eHashPolicy = -1;

void recon_set_hash_policy(
  const int cchPathPrefix,    /* Directory prefix length for zUuidAsFilePath */
  const char *zUuidAsFilePath /* Relative, well-formed, from recon_read_dir() */
){
  int cchUuidAsFilePath;
  const char *zHashPart;
  int cchHashPart = 0;
  int new_eHashPolicy = -1;
  assert( HNAME_COUNT==2 ); /* Review function if new hashes are implemented. */
  if( zUuidAsFilePath==0 ) return;
  cchUuidAsFilePath = strlen(zUuidAsFilePath);
  if( cchUuidAsFilePath==0 ) return;
  if( cchPathPrefix>=cchUuidAsFilePath ) return;
  for( zHashPart = zUuidAsFilePath + cchPathPrefix; *zHashPart; zHashPart++ ){
    if( *zHashPart!='/' ) cchHashPart++;
  }
  if( cchHashPart>=HNAME_LEN_K256 ){
    new_eHashPolicy = HPOLICY_SHA3;
  }else if( cchHashPart>=HNAME_LEN_SHA1 ){
    new_eHashPolicy = HPOLICY_SHA1;
  }
  if( new_eHashPolicy!=-1 ){
    saved_eHashPolicy = g.eHashPolicy;
    g.eHashPolicy = new_eHashPolicy;
  }
}

void recon_restore_hash_policy(){
  if( saved_eHashPolicy!=-1 ){
    g.eHashPolicy = saved_eHashPolicy;
    saved_eHashPolicy = -1;
  }
}

#if 0
/*
** COMMAND: test-hash-from-path*
**
** Usage: %fossil test-hash-from-path ?OPTIONS? DESTINATION UUID
**
** Generate a sample path name from DESTINATION and UUID, as the `deconstruct'
** command would do.  Then try to guess the hash policy from the path name, as
** the `reconstruct' command would do.
**
** No files or directories will be created.
**
** Options:
**   -L|--prefixlength N     Set the length of the names of the DESTINATION
**                           subdirectories to N.
*/
void test_hash_from_path_cmd(void) {
  char *zDest;
  char *zUuid;
  char *zFile;
  const char *zHashPolicy = "unknown";
  const char *zPrefixOpt = find_option("prefixlength","L",1);
  int iPrefixLength;
  if( !zPrefixOpt ){
    iPrefixLength = 2;
  }else{
    iPrefixLength = atoi(zPrefixOpt);
    if( iPrefixLength<0 || iPrefixLength>9 ){
      fossil_fatal("N(%s) is not a valid prefix length!",zPrefixOpt);
    }
  }
  if( g.argc!=4 ){
    usage ("?OPTIONS? DESTINATION UUID");
  }
  zDest = g.argv[2];
  zUuid = g.argv[3];
  if( iPrefixLength ){
    zFNameFormat = mprintf("%s/%%.%ds/%%s",zDest,iPrefixLength);
  }else{
    zFNameFormat = mprintf("%s/%%s",zDest);
  }
  cchFNamePrefix = strlen(zDest);
  zFile = mprintf(zFNameFormat /*works-like:"%s:%s"*/,
                  zUuid, zUuid+iPrefixLength);
  recon_set_hash_policy(cchFNamePrefix,zFile);
  if( saved_eHashPolicy!=-1 ){
    zHashPolicy = hpolicy_name();
  }
  recon_restore_hash_policy();
  fossil_print(
    "\nPath Name:   %s"
    "\nHash Policy: %s\n",
    zFile,zHashPolicy);
  free(zFile);
  free(zFNameFormat);
  zFNameFormat = 0;
  cchFNamePrefix = 0;
}
#endif

/*
** COMMAND: reconstruct*
**
** Usage: %fossil reconstruct ?OPTIONS? FILENAME DIRECTORY
**
** This command studies the artifacts (files) in DIRECTORY and
** reconstructs the fossil record from them. It places the new
** fossil repository in FILENAME. Subdirectories are read, files
** with leading '.' in the filename are ignored.
**
** Options:
**    -K|--keep-rid1    Read the filename of the artifact with
**                      RID=1 from the file .rid in DIRECTORY.
**
** See also: deconstruct, rebuild
*/
void reconstruct_cmd(void) {
  char *zPassword;
  fKeepRid1 = find_option("keep-rid1","K",0)!=0;
  if( g.argc!=4 ){
    usage("FILENAME DIRECTORY");
  }
  if( file_isdir(g.argv[3], ExtFILE)!=1 ){
    fossil_print("\"%s\" is not a directory\n\n", g.argv[3]);
    usage("FILENAME DIRECTORY");
  }
................................................................................
** writes all artifacts to the file system. The DESTINATION directory
** will be populated with subdirectories AA and files AA/BBBBBBBBB.., where
** AABBBBBBBBB.. is the 40+ character artifact ID, AA the first 2 characters.
** If -L|--prefixlength is given, the length (default 2) of the directory
** prefix can be set to 0,1,..,9 characters.
**
** Options:
**   -R|--repository REPOSITORY  Deconstruct given REPOSITORY.
**   -K|--keep-rid1              Save the filename of the artifact with RID=1 to
**                               the file .rid1 in the DESTINATION directory.
**   -L|--prefixlength N         Set the length of the names of the DESTINATION
**                               subdirectories to N.
**   --private                   Include private artifacts.
**
** See also: rebuild, reconstruct
*/
void deconstruct_cmd(void){

  const char *zPrefixOpt;
  Stmt        s;
  int privateFlag;

  fKeepRid1 = find_option("keep-rid1","K",0)!=0;
  /* get and check prefix length argument and build format string */
  zPrefixOpt=find_option("prefixlength","L",1);
  if( !zPrefixOpt ){
    prefixLength = 2;
  }else{
    if( zPrefixOpt[0]>='0' && zPrefixOpt[0]<='9' && !zPrefixOpt[1] ){
      prefixLength = (int)(*zPrefixOpt-'0');
................................................................................
  */
#endif
  if( prefixLength ){
    zFNameFormat = mprintf("%s/%%.%ds/%%s",zDestDir,prefixLength);
  }else{
    zFNameFormat = mprintf("%s/%%s",zDestDir);
  }
  cchFNamePrefix = strlen(zDestDir);

  bag_init(&bagDone);
  ttyOutput = 1;
  processCnt = 0;
  if (!g.fQuiet) {
    fossil_print("0 (0%%)...\r");
    fflush(stdout);

static sqlite3_mem_methods ersaztMethods = {
  memtraceMalloc,
  memtraceFree,
  memtraceRealloc,
  memtraceSize,
  memtraceRoundup,
  memtraceInit,
  memtraceShutdown

};

/* Begin tracing memory allocations to out. */
int sqlite3MemTraceActivate(FILE *out){
  int rc = SQLITE_OK;
  if( memtraceBase.xMalloc==0 ){
    rc = sqlite3_config(SQLITE_CONFIG_GETMALLOC, &memtraceBase);
................................................................................
  int mode;              /* An output mode setting */
  int modePrior;         /* Saved mode */
  int cMode;             /* temporary output mode for the current query */
  int normalMode;        /* Output mode before ".explain on" */
  int writableSchema;    /* True if PRAGMA writable_schema=ON */
  int showHeader;        /* True to show column names in List or Column mode */
  int nCheck;            /* Number of ".check" commands run */



  unsigned shellFlgs;    /* Various flags */
  sqlite3_int64 szMax;   /* --maxsize argument to .open */
  char *zDestTable;      /* Name of destination table when MODE_Insert */
  char *zTempFile;       /* Temporary file that might need deleting */
  char zTestcase[30];    /* Name of current test case */
  char colSeparator[20]; /* Column separator character for several modes */
  char rowSeparator[20]; /* Row separator character for MODE_Ascii */
................................................................................

/* Allowed values for ShellState.eTraceType
*/
#define SHELL_TRACE_PLAIN      0      /* Show input SQL text */
#define SHELL_TRACE_EXPANDED   1      /* Show expanded SQL text */
#define SHELL_TRACE_NORMALIZED 2      /* Show normalized SQL text */








/*
** These are the allowed shellFlgs values
*/
#define SHFLG_Pagecache      0x00000001 /* The --pagecache option is used */
#define SHFLG_Lookaside      0x00000002 /* Lookaside memory is used */
#define SHFLG_Backslash      0x00000004 /* The --backslash option is used */
#define SHFLG_PreserveRowid  0x00000008 /* .dump preserves rowid values */
................................................................................
    }
    p->sGraph.zPrefix[0] = 0;
    eqp_render_level(p, 0);
    eqp_reset(p);
  }
}





















/*
** This is the callback routine that the shell
** invokes for each row of a query result.
*/
static int shell_callback(
  void *pArg,
  int nArg,        /* Number of result columns */
................................................................................
#endif
  "        --new           Initialize FILE to an empty database",
  "        --readonly      Open FILE readonly",
  "        --zip           FILE is a ZIP archive",
  ".output ?FILE?           Send output to FILE or stdout if FILE is omitted",
  "     If FILE begins with '|' then open it as a pipe.",
  ".print STRING...         Print literal STRING",







  ".prompt MAIN CONTINUE    Replace the standard prompts",
  ".quit                    Exit this program",
  ".read FILE               Read input from FILE",
  ".restore ?DB? FILE       Restore content of DB (default \"main\") from FILE",
  ".save FILE               Write in-memory database into FILE",
  ".scanstats on|off        Turn sqlite3_stmt_scanstatus() metrics on or off",
  ".schema ?PATTERN?        Show the CREATE statements matching PATTERN",
................................................................................
    for(i=1; i<nArg; i++){
      if( i>1 ) raw_printf(p->out, " ");
      utf8_printf(p->out, "%s", azArg[i]);
    }
    raw_printf(p->out, "\n");
  }else















































  if( c=='p' && strncmp(azArg[0], "prompt", n)==0 ){
    if( nArg >= 2) {
      strncpy(mainPrompt,azArg[1],(int)ArraySize(mainPrompt)-1);
    }
    if( nArg >= 3) {
      strncpy(continuePrompt,azArg[2],(int)ArraySize(continuePrompt)-1);
    }
................................................................................
*/
static int runOneSqlLine(ShellState *p, char *zSql, FILE *in, int startline){
  int rc;
  char *zErrMsg = 0;

  open_db(p, 0);
  if( ShellHasFlag(p,SHFLG_Backslash) ) resolve_backslashes(zSql);

  BEGIN_TIMER;
  rc = shell_exec(p, zSql, &zErrMsg);
  END_TIMER;
  if( rc || zErrMsg ){
    char zPrefix[100];
    if( in!=0 || !stdin_is_interactive ){
      sqlite3_snprintf(sizeof(zPrefix), zPrefix,
................................................................................
  "   -interactive         force interactive I/O\n"
  "   -line                set output mode to 'line'\n"
  "   -list                set output mode to 'list'\n"
  "   -lookaside SIZE N    use N entries of SZ bytes for lookaside memory\n"
#if defined(SQLITE_ENABLE_DESERIALIZE)
  "   -maxsize N           maximum size for a --deserialize database\n"
#endif

  "   -mmap N              default mmap size set to N\n"
#ifdef SQLITE_ENABLE_MULTIPLEX
  "   -multiplex           enable the multiplexor VFS\n"
#endif
  "   -newline SEP         set output row separator. Default: '\\n'\n"
  "   -nullvalue TEXT      set text string for NULL values. Default ''\n"
  "   -pagecache SIZE N    use N slots of SZ bytes each for page cache memory\n"

static sqlite3_mem_methods ersaztMethods = {
  memtraceMalloc,
  memtraceFree,
  memtraceRealloc,
  memtraceSize,
  memtraceRoundup,
  memtraceInit,
  memtraceShutdown,
  0
};

/* Begin tracing memory allocations to out. */
int sqlite3MemTraceActivate(FILE *out){
  int rc = SQLITE_OK;
  if( memtraceBase.xMalloc==0 ){
    rc = sqlite3_config(SQLITE_CONFIG_GETMALLOC, &memtraceBase);
................................................................................
  int mode;              /* An output mode setting */
  int modePrior;         /* Saved mode */
  int cMode;             /* temporary output mode for the current query */
  int normalMode;        /* Output mode before ".explain on" */
  int writableSchema;    /* True if PRAGMA writable_schema=ON */
  int showHeader;        /* True to show column names in List or Column mode */
  int nCheck;            /* Number of ".check" commands run */
  unsigned nProgress;    /* Number of progress callbacks encountered */
  unsigned mxProgress;   /* Maximum progress callbacks before failing */
  unsigned flgProgress;  /* Flags for the progress callback */
  unsigned shellFlgs;    /* Various flags */
  sqlite3_int64 szMax;   /* --maxsize argument to .open */
  char *zDestTable;      /* Name of destination table when MODE_Insert */
  char *zTempFile;       /* Temporary file that might need deleting */
  char zTestcase[30];    /* Name of current test case */
  char colSeparator[20]; /* Column separator character for several modes */
  char rowSeparator[20]; /* Row separator character for MODE_Ascii */
................................................................................

/* Allowed values for ShellState.eTraceType
*/
#define SHELL_TRACE_PLAIN      0      /* Show input SQL text */
#define SHELL_TRACE_EXPANDED   1      /* Show expanded SQL text */
#define SHELL_TRACE_NORMALIZED 2      /* Show normalized SQL text */

/* Bits in the ShellState.flgProgress variable */
#define SHELL_PROGRESS_QUIET 0x01  /* Omit announcing every progress callback */
#define SHELL_PROGRESS_RESET 0x02  /* Reset the count when the progres
                                   ** callback limit is reached, and for each
                                   ** top-level SQL statement */
#define SHELL_PROGRESS_ONCE  0x04  /* Cancel the --limit after firing once */

/*
** These are the allowed shellFlgs values
*/
#define SHFLG_Pagecache      0x00000001 /* The --pagecache option is used */
#define SHFLG_Lookaside      0x00000002 /* Lookaside memory is used */
#define SHFLG_Backslash      0x00000004 /* The --backslash option is used */
#define SHFLG_PreserveRowid  0x00000008 /* .dump preserves rowid values */
................................................................................
    }
    p->sGraph.zPrefix[0] = 0;
    eqp_render_level(p, 0);
    eqp_reset(p);
  }
}

#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
/*
** Progress handler callback.
*/
static int progress_handler(void *pClientData) {
  ShellState *p = (ShellState*)pClientData;
  p->nProgress++;
  if( p->nProgress>=p->mxProgress && p->mxProgress>0 ){
    raw_printf(p->out, "Progress limit reached (%u)\n", p->nProgress);
    if( p->flgProgress & SHELL_PROGRESS_RESET ) p->nProgress = 0;
    if( p->flgProgress & SHELL_PROGRESS_ONCE ) p->mxProgress = 0;
    return 1;
  }
  if( (p->flgProgress & SHELL_PROGRESS_QUIET)==0 ){
    raw_printf(p->out, "Progress %u\n", p->nProgress);
  }
  return 0;
}
#endif /* SQLITE_OMIT_PROGRESS_CALLBACK */

/*
** This is the callback routine that the shell
** invokes for each row of a query result.
*/
static int shell_callback(
  void *pArg,
  int nArg,        /* Number of result columns */
................................................................................
#endif
  "        --new           Initialize FILE to an empty database",
  "        --readonly      Open FILE readonly",
  "        --zip           FILE is a ZIP archive",
  ".output ?FILE?           Send output to FILE or stdout if FILE is omitted",
  "     If FILE begins with '|' then open it as a pipe.",
  ".print STRING...         Print literal STRING",
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  ".progress N              Invoke progress handler after every N opcodes",
  "   --limit N                 Interrupt after N progress callbacks",
  "   --once                    Do no more than one progress interrupt",
  "   --quiet|-q                No output except at interrupts",
  "   --reset                   Reset the count for each input and interrupt",
#endif
  ".prompt MAIN CONTINUE    Replace the standard prompts",
  ".quit                    Exit this program",
  ".read FILE               Read input from FILE",
  ".restore ?DB? FILE       Restore content of DB (default \"main\") from FILE",
  ".save FILE               Write in-memory database into FILE",
  ".scanstats on|off        Turn sqlite3_stmt_scanstatus() metrics on or off",
  ".schema ?PATTERN?        Show the CREATE statements matching PATTERN",
................................................................................
    for(i=1; i<nArg; i++){
      if( i>1 ) raw_printf(p->out, " ");
      utf8_printf(p->out, "%s", azArg[i]);
    }
    raw_printf(p->out, "\n");
  }else

#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  if( c=='p' && n>=3 && strncmp(azArg[0], "progress", n)==0 ){
    int i;
    int nn = 0;
    p->flgProgress = 0;
    p->mxProgress = 0;
    p->nProgress = 0;
    for(i=1; i<nArg; i++){
      const char *z = azArg[i];
      if( z[0]=='-' ){
        z++;
        if( z[0]=='-' ) z++;
        if( strcmp(z,"quiet")==0 || strcmp(z,"q")==0 ){
          p->flgProgress |= SHELL_PROGRESS_QUIET;
          continue;
        }
        if( strcmp(z,"reset")==0 ){
          p->flgProgress |= SHELL_PROGRESS_RESET;
          continue;
        }
        if( strcmp(z,"once")==0 ){
          p->flgProgress |= SHELL_PROGRESS_ONCE;
          continue;
        }
        if( strcmp(z,"limit")==0 ){
          if( i+1>=nArg ){
            utf8_printf(stderr, "Error: missing argument on --limit\n");
            rc = 1;
            goto meta_command_exit;
          }else{
            p->mxProgress = (int)integerValue(azArg[++i]);
          }
          continue;
        }
        utf8_printf(stderr, "Error: unknown option: \"%s\"\n", azArg[i]);
        rc = 1;
        goto meta_command_exit;
      }else{
        nn = (int)integerValue(z);
      }
    }
    open_db(p, 0);
    sqlite3_progress_handler(p->db, nn, progress_handler, p);
  }else
#endif /* SQLITE_OMIT_PROGRESS_CALLBACK */

  if( c=='p' && strncmp(azArg[0], "prompt", n)==0 ){
    if( nArg >= 2) {
      strncpy(mainPrompt,azArg[1],(int)ArraySize(mainPrompt)-1);
    }
    if( nArg >= 3) {
      strncpy(continuePrompt,azArg[2],(int)ArraySize(continuePrompt)-1);
    }
................................................................................
*/
static int runOneSqlLine(ShellState *p, char *zSql, FILE *in, int startline){
  int rc;
  char *zErrMsg = 0;

  open_db(p, 0);
  if( ShellHasFlag(p,SHFLG_Backslash) ) resolve_backslashes(zSql);
  if( p->flgProgress & SHELL_PROGRESS_RESET ) p->nProgress = 0;
  BEGIN_TIMER;
  rc = shell_exec(p, zSql, &zErrMsg);
  END_TIMER;
  if( rc || zErrMsg ){
    char zPrefix[100];
    if( in!=0 || !stdin_is_interactive ){
      sqlite3_snprintf(sizeof(zPrefix), zPrefix,
................................................................................
  "   -interactive         force interactive I/O\n"
  "   -line                set output mode to 'line'\n"
  "   -list                set output mode to 'list'\n"
  "   -lookaside SIZE N    use N entries of SZ bytes for lookaside memory\n"
#if defined(SQLITE_ENABLE_DESERIALIZE)
  "   -maxsize N           maximum size for a --deserialize database\n"
#endif
  "   -memtrace            trace all memory allocations and deallocations\n"
  "   -mmap N              default mmap size set to N\n"
#ifdef SQLITE_ENABLE_MULTIPLEX
  "   -multiplex           enable the multiplexor VFS\n"
#endif
  "   -newline SEP         set output row separator. Default: '\\n'\n"
  "   -nullvalue TEXT      set text string for NULL values. Default ''\n"
  "   -pagecache SIZE N    use N slots of SZ bytes each for page cache memory\n"

/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.27.0.  By combining all the individual C code files into this
** single large file, the entire code can be compiled as a single translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% or more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
................................................................................
** been edited in any way since it was last checked in, then the last
** four hexadecimal digits of the hash may be modified.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.27.0"
#define SQLITE_VERSION_NUMBER 3027000
#define SQLITE_SOURCE_ID      "2019-01-27 02:45:32 9cf8ebd141aa2eb661d457624c76433bd9e4abfdef04aa52e28bc169172calt1"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
** than the configured sorter-reference size threshold - then a reference
** is stored in each sorted record and the required column values loaded
** from the database as records are returned in sorted order. The default
** value for this option is to never use this optimization. Specifying a 
** negative value for this option restores the default behaviour.
** This option is only available if SQLite is compiled with the
** [SQLITE_ENABLE_SORTER_REFERENCES] compile-time option.











** </dl>
*/
#define SQLITE_CONFIG_SINGLETHREAD  1  /* nil */
#define SQLITE_CONFIG_MULTITHREAD   2  /* nil */
#define SQLITE_CONFIG_SERIALIZED    3  /* nil */
#define SQLITE_CONFIG_MALLOC        4  /* sqlite3_mem_methods* */
#define SQLITE_CONFIG_GETMALLOC     5  /* sqlite3_mem_methods* */
................................................................................
#define SQLITE_CONFIG_MMAP_SIZE    22  /* sqlite3_int64, sqlite3_int64 */
#define SQLITE_CONFIG_WIN32_HEAPSIZE      23  /* int nByte */
#define SQLITE_CONFIG_PCACHE_HDRSZ        24  /* int *psz */
#define SQLITE_CONFIG_PMASZ               25  /* unsigned int szPma */
#define SQLITE_CONFIG_STMTJRNL_SPILL      26  /* int nByte */
#define SQLITE_CONFIG_SMALL_MALLOC        27  /* boolean */
#define SQLITE_CONFIG_SORTERREF_SIZE      28  /* int nByte */


/*
** CAPI3REF: Database Connection Configuration Options
**
** These constants are the available integer configuration options that
** can be passed as the second argument to the [sqlite3_db_config()] interface.
**
................................................................................
** zero is returned.
** 
** If F is a NULL pointer, then sqlite3_uri_parameter(F,P) returns NULL and
** sqlite3_uri_boolean(F,P,B) returns B.  If F is not a NULL pointer and
** is not a database file pathname pointer that SQLite passed into the xOpen
** VFS method, then the behavior of this routine is undefined and probably
** undesirable.


*/
SQLITE_API const char *sqlite3_uri_parameter(const char *zFilename, const char *zParam);
SQLITE_API int sqlite3_uri_boolean(const char *zFile, const char *zParam, int bDefault);
SQLITE_API sqlite3_int64 sqlite3_uri_int64(const char*, const char*, sqlite3_int64);


/*
................................................................................
SQLITE_PRIVATE i64 sqlite3BtreeIntegerKey(BtCursor*);
#ifdef SQLITE_ENABLE_OFFSET_SQL_FUNC
SQLITE_PRIVATE i64 sqlite3BtreeOffset(BtCursor*);
#endif
SQLITE_PRIVATE int sqlite3BtreePayload(BtCursor*, u32 offset, u32 amt, void*);
SQLITE_PRIVATE const void *sqlite3BtreePayloadFetch(BtCursor*, u32 *pAmt);
SQLITE_PRIVATE u32 sqlite3BtreePayloadSize(BtCursor*);


SQLITE_PRIVATE char *sqlite3BtreeIntegrityCheck(Btree*, int *aRoot, int nRoot, int, int*);
SQLITE_PRIVATE struct Pager *sqlite3BtreePager(Btree*);
SQLITE_PRIVATE i64 sqlite3BtreeRowCountEst(BtCursor*);

#ifndef SQLITE_OMIT_INCRBLOB
SQLITE_PRIVATE int sqlite3BtreePayloadChecked(BtCursor*, u32 offset, u32 amt, void*);
................................................................................
#define HI(X)  ((u64)(X)<<32)
#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace       HI(0x0001)  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    HI(0x0002)  /* Debug listings of VDBE progs */
#define SQLITE_VdbeTrace      HI(0x0004)  /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace HI(0x0008)  /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_VdbeEQP        HI(0x0010)  /* Debug EXPLAIN QUERY PLAN */

#endif

/*
** Allowed values for sqlite3.mDbFlags
*/
#define DBFLAG_SchemaChange   0x0001  /* Uncommitted Hash table changes */
#define DBFLAG_PreferBuiltin  0x0002  /* Preference to built-in funcs */
................................................................................
#ifdef SQLITE_VDBE_COVERAGE
  /* The following callback (if not NULL) is invoked on every VDBE branch
  ** operation.  Set the callback using SQLITE_TESTCTRL_VDBE_COVERAGE.
  */
  void (*xVdbeBranch)(void*,unsigned iSrcLine,u8 eThis,u8 eMx);  /* Callback */
  void *pVdbeBranchArg;                                     /* 1st argument */
#endif



#ifndef SQLITE_UNTESTABLE
  int (*xTestCallback)(int);        /* Invoked by sqlite3FaultSim() */
#endif
  int bLocaltimeFault;              /* True to fail localtime() calls */
  int bInternalFunctions;           /* Internal SQL functions are visible */
  int iOnceResetThreshold;          /* When to reset OP_Once counters */
  u32 szSorterRef;                  /* Min size in bytes to use sorter-refs */
................................................................................
SQLITE_PRIVATE ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*);
SQLITE_PRIVATE ExprList *sqlite3ExprListAppendVector(Parse*,ExprList*,IdList*,Expr*);
SQLITE_PRIVATE void sqlite3ExprListSetSortOrder(ExprList*,int);
SQLITE_PRIVATE void sqlite3ExprListSetName(Parse*,ExprList*,Token*,int);
SQLITE_PRIVATE void sqlite3ExprListSetSpan(Parse*,ExprList*,const char*,const char*);
SQLITE_PRIVATE void sqlite3ExprListDelete(sqlite3*, ExprList*);
SQLITE_PRIVATE u32 sqlite3ExprListFlags(const ExprList*);

SQLITE_PRIVATE int sqlite3Init(sqlite3*, char**);
SQLITE_PRIVATE int sqlite3InitCallback(void*, int, char**, char**);
SQLITE_PRIVATE int sqlite3InitOne(sqlite3*, int, char**, u32);
SQLITE_PRIVATE void sqlite3Pragma(Parse*,Token*,Token*,Token*,int);
#ifndef SQLITE_OMIT_VIRTUALTABLE
SQLITE_PRIVATE Module *sqlite3PragmaVtabRegister(sqlite3*,const char *zName);
#endif
................................................................................
SQLITE_PRIVATE void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int);
SQLITE_PRIVATE void sqlite3AddCheckConstraint(Parse*, Expr*);
SQLITE_PRIVATE void sqlite3AddDefaultValue(Parse*,Expr*,const char*,const char*);
SQLITE_PRIVATE void sqlite3AddCollateType(Parse*, Token*);
SQLITE_PRIVATE void sqlite3EndTable(Parse*,Token*,Token*,u8,Select*);
SQLITE_PRIVATE int sqlite3ParseUri(const char*,const char*,unsigned int*,
                    sqlite3_vfs**,char**,char **);





SQLITE_PRIVATE Btree *sqlite3DbNameToBtree(sqlite3*,const char*);

#ifdef SQLITE_UNTESTABLE
# define sqlite3FaultSim(X) SQLITE_OK
#else
SQLITE_PRIVATE   int sqlite3FaultSim(int);
#endif
................................................................................
** sqlite3_db_config(db, SQLITE_DBCONFIG_LOOKASIDE);
*/
#ifndef SQLITE_DEFAULT_LOOKASIDE
# define SQLITE_DEFAULT_LOOKASIDE 1200,100
#endif









/*
** The following singleton contains the global configuration for
** the SQLite library.
*/
SQLITE_PRIVATE SQLITE_WSD struct Sqlite3Config sqlite3Config = {
   SQLITE_DEFAULT_MEMSTATUS,  /* bMemstat */
   1,                         /* bCoreMutex */
................................................................................
   0,                         /* xSqllog */
   0,                         /* pSqllogArg */
#endif
#ifdef SQLITE_VDBE_COVERAGE
   0,                         /* xVdbeBranch */
   0,                         /* pVbeBranchArg */
#endif



#ifndef SQLITE_UNTESTABLE
   0,                         /* xTestCallback */
#endif
   0,                         /* bLocaltimeFault */
   0,                         /* bInternalFunctions */
   0x7ffffffe,                /* iOnceResetThreshold */
   SQLITE_DEFAULT_SORTERREF_SIZE   /* szSorterRef */
};

/*
** Hash table for global functions - functions common to all
** database connections.  After initialization, this table is
** read-only.
*/
................................................................................
  return sqlite3_value_double(p->apArg[p->nUsed++]);
}
static char *getTextArg(PrintfArguments *p){
  if( p->nArg<=p->nUsed ) return 0;
  return (char*)sqlite3_value_text(p->apArg[p->nUsed++]);
}























/*
** On machines with a small stack size, you can redefine the
** SQLITE_PRINT_BUF_SIZE to be something smaller, if desired.
*/
#ifndef SQLITE_PRINT_BUF_SIZE
# define SQLITE_PRINT_BUF_SIZE 70
................................................................................
      sqlite3_str_append(pAccum, "%", 1);
      break;
    }
    /* Find out what flags are present */
    flag_leftjustify = flag_prefix = cThousand =
     flag_alternateform = flag_altform2 = flag_zeropad = 0;
    done = 0;



    do{
      switch( c ){
        case '-':   flag_leftjustify = 1;     break;
        case '+':   flag_prefix = '+';        break;
        case ' ':   flag_prefix = ' ';        break;
        case '#':   flag_alternateform = 1;   break;
        case '!':   flag_altform2 = 1;        break;
        case '0':   flag_zeropad = 1;         break;
        case ',':   cThousand = ',';          break;
        default:    done = 1;                 break;
      }
    }while( !done && (c=(*++fmt))!=0 );
    /* Get the field width */



    if( c=='*' ){
      if( bArgList ){
        width = (int)getIntArg(pArgList);
      }else{
        width = va_arg(ap,int);

      }
      if( width<0 ){
        flag_leftjustify = 1;
        width = width >= -2147483647 ? -width : 0;

      }
      c = *++fmt;
    }else{
      unsigned wx = 0;
      while( c>='0' && c<='9' ){
        wx = wx*10 + c - '0';
        c = *++fmt;
      }
      testcase( wx>0x7fffffff );
      width = wx & 0x7fffffff;



    }














    assert( width>=0 );



#ifdef SQLITE_PRINTF_PRECISION_LIMIT
    if( width>SQLITE_PRINTF_PRECISION_LIMIT ){
      width = SQLITE_PRINTF_PRECISION_LIMIT;
    }
#endif




    /* Get the precision */
    if( c=='.' ){



      c = *++fmt;
      if( c=='*' ){
        if( bArgList ){
          precision = (int)getIntArg(pArgList);
        }else{
          precision = va_arg(ap,int);
        }
        c = *++fmt;
        if( precision<0 ){
          precision = precision >= -2147483647 ? -precision : -1;
        }

      }else{
        unsigned px = 0;
        while( c>='0' && c<='9' ){
          px = px*10 + c - '0';
          c = *++fmt;
        }
        testcase( px>0x7fffffff );
        precision = px & 0x7fffffff;
      }
    }else{
      precision = -1;
    }
    assert( precision>=(-1) );
#ifdef SQLITE_PRINTF_PRECISION_LIMIT
    if( precision>SQLITE_PRINTF_PRECISION_LIMIT ){
      precision = SQLITE_PRINTF_PRECISION_LIMIT;
    }
#endif







    /* Get the conversion type modifier */
    if( c=='l' ){
      flag_long = 1;
      c = *++fmt;
      if( c=='l' ){
        flag_long = 2;
        c = *++fmt;
      }
    }else{
      flag_long = 0;

    }
    /* Fetch the info entry for the field */
    infop = &fmtinfo[0];
    xtype = etINVALID;
    for(idx=0; idx<ArraySize(fmtinfo); idx++){
      if( c==fmtinfo[idx].fmttype ){
        infop = &fmtinfo[idx];
        xtype = infop->type;
................................................................................
        if( flag_zeropad && precision<width-(prefix!=0) ){
          precision = width-(prefix!=0);
        }
        if( precision<etBUFSIZE-10-etBUFSIZE/3 ){
          nOut = etBUFSIZE;
          zOut = buf;
        }else{
          u64 n = (u64)precision + 10 + precision/3;
          zOut = zExtra = sqlite3Malloc( n );
          if( zOut==0 ){
            setStrAccumError(pAccum, SQLITE_NOMEM);
            return;
          }
          nOut = (int)n;
        }
        bufpt = &zOut[nOut-1];
        if( xtype==etORDINAL ){
          static const char zOrd[] = "thstndrd";
          int x = (int)(longvalue % 10);
          if( x>=4 || (longvalue/10)%10==1 ){
................................................................................
          flag_rtz = flag_altform2;
        }
        if( xtype==etEXP ){
          e2 = 0;
        }else{
          e2 = exp;
        }
        if( MAX(e2,0)+(i64)precision+(i64)width > etBUFSIZE - 15 ){
          bufpt = zExtra 
              = sqlite3Malloc( MAX(e2,0)+(i64)precision+(i64)width+15 );
          if( bufpt==0 ){
            setStrAccumError(pAccum, SQLITE_NOMEM);
            return;
          }
        }
        zOut = bufpt;
        nsd = 16 + flag_altform2*10;
        flag_dp = (precision>0 ?1:0) | flag_alternateform | flag_altform2;
        /* The sign in front of the number */
        if( prefix ){
................................................................................
          if( flag_altform2 && (ch&0xc0)==0xc0 ){
            while( (escarg[i+1]&0xc0)==0x80 ){ i++; }
          }
        }
        needQuote = !isnull && xtype==etSQLESCAPE2;
        n += i + 3;
        if( n>etBUFSIZE ){
          bufpt = zExtra = sqlite3Malloc( n );
          if( bufpt==0 ){
            setStrAccumError(pAccum, SQLITE_NOMEM);
            return;
          }
        }else{
          bufpt = buf;
        }
        j = 0;
        if( needQuote ) bufpt[j++] = q;
        k = i;
        for(i=0; i<k; i++){
................................................................................
  sqlite3_int64 szMax;            /* Maximum allowed size of the file */
  unsigned char *aData;           /* content of the file */
  int nMmap;                      /* Number of memory mapped pages */
  unsigned mFlags;                /* Flags */
  int eLock;                      /* Most recent lock against this file */
};

/* The default maximum size of an in-memory database */
#ifndef SQLITE_MEMDB_DEFAULT_MAXSIZE
# define SQLITE_MEMDB_DEFAULT_MAXSIZE 1073741824
#endif

/*
** Methods for MemFile
*/
static int memdbClose(sqlite3_file*);
static int memdbRead(sqlite3_file*, void*, int iAmt, sqlite3_int64 iOfst);
static int memdbWrite(sqlite3_file*,const void*,int iAmt, sqlite3_int64 iOfst);
static int memdbTruncate(sqlite3_file*, sqlite3_int64 size);
................................................................................
  sqlite3_file *pFile,
  sqlite3_int64 iOfst,
  int iAmt,
  void **pp
){
  MemFile *p = (MemFile *)pFile;
  if( iOfst+iAmt>p->sz ){
    assert( CORRUPT_DB );
    *pp = 0;
  }else{
    p->nMmap++;
    *pp = (void*)(p->aData + iOfst);
  }
  return SQLITE_OK;
}
................................................................................
    return ORIGVFS(pVfs)->xOpen(ORIGVFS(pVfs), zName, pFile, flags, pOutFlags);
  }
  memset(p, 0, sizeof(*p));
  p->mFlags = SQLITE_DESERIALIZE_RESIZEABLE | SQLITE_DESERIALIZE_FREEONCLOSE;
  assert( pOutFlags!=0 );  /* True because flags==SQLITE_OPEN_MAIN_DB */
  *pOutFlags = flags | SQLITE_OPEN_MEMORY;
  p->base.pMethods = &memdb_io_methods;
  p->szMax = SQLITE_MEMDB_DEFAULT_MAXSIZE;
  return SQLITE_OK;
}

#if 0 /* Only used to delete rollback journals, master journals, and WAL
      ** files, none of which exist in memdb.  So this routine is never used */
/*
** Delete the file located at zPath. If the dirSync argument is true,
................................................................................
  if( p==0 ){
    rc = SQLITE_ERROR;
  }else{
    p->aData = pData;
    p->sz = szDb;
    p->szAlloc = szBuf;
    p->szMax = szBuf;
    if( p->szMax<SQLITE_MEMDB_DEFAULT_MAXSIZE ){
      p->szMax = SQLITE_MEMDB_DEFAULT_MAXSIZE;
    }
    p->mFlags = mFlags;
    rc = SQLITE_OK;
  }

end_deserialize:
  sqlite3_finalize(pStmt);
................................................................................
typedef struct PGroup PGroup;

/*
** Each cache entry is represented by an instance of the following 
** structure. Unless SQLITE_PCACHE_SEPARATE_HEADER is defined, a buffer of
** PgHdr1.pCache->szPage bytes is allocated directly before this structure 
** in memory.










*/
struct PgHdr1 {
  sqlite3_pcache_page page;      /* Base class. Must be first. pBuf & pExtra */
  unsigned int iKey;             /* Key value (page number) */
  u8 isBulkLocal;                /* This page from bulk local storage */
  u8 isAnchor;                   /* This is the PGroup.lru element */
  PgHdr1 *pNext;                 /* Next in hash table chain */
  PCache1 *pCache;               /* Cache that currently owns this page */
  PgHdr1 *pLruNext;              /* Next in LRU list of unpinned pages */
  PgHdr1 *pLruPrev;              /* Previous in LRU list of unpinned pages */
                                 /* NB: pLruPrev is only valid if pLruNext!=0 */
};

................................................................................
    do{
      PgHdr1 *pX = (PgHdr1*)&zBulk[pCache->szPage];
      pX->page.pBuf = zBulk;
      pX->page.pExtra = &pX[1];
      pX->isBulkLocal = 1;
      pX->isAnchor = 0;
      pX->pNext = pCache->pFree;

      pCache->pFree = pX;
      zBulk += pCache->szAlloc;
    }while( --nBulk );
  }
  return pCache->pFree!=0;
}

................................................................................
** but cursors cannot be shared.  Each cursor is associated with a
** particular database connection identified BtCursor.pBtree.db.
**
** Fields in this structure are accessed under the BtShared.mutex
** found at self->pBt->mutex. 
**
** skipNext meaning:
**    eState==SKIPNEXT && skipNext>0:  Next sqlite3BtreeNext() is no-op.





**    eState==SKIPNEXT && skipNext<0:  Next sqlite3BtreePrevious() is no-op.
**    eState==FAULT:                   Cursor fault with skipNext as error code.



*/
struct BtCursor {
  u8 eState;                /* One of the CURSOR_XXX constants (see below) */
  u8 curFlags;              /* zero or more BTCF_* flags defined below */
  u8 curPagerFlags;         /* Flags to send to sqlite3PagerGet() */
  u8 hints;                 /* As configured by CursorSetHints() */
  int skipNext;    /* Prev() is noop if negative. Next() is noop if positive.
................................................................................
  }
  pCur->eState = CURSOR_INVALID;
  rc = btreeMoveto(pCur, pCur->pKey, pCur->nKey, 0, &skipNext);
  if( rc==SQLITE_OK ){
    sqlite3_free(pCur->pKey);
    pCur->pKey = 0;
    assert( pCur->eState==CURSOR_VALID || pCur->eState==CURSOR_INVALID );
    pCur->skipNext |= skipNext;
    if( pCur->skipNext && pCur->eState==CURSOR_VALID ){
      pCur->eState = CURSOR_SKIPNEXT;
    }
  }
  return rc;
}

................................................................................
  if( rc ){
    *pDifferentRow = 1;
    return rc;
  }
  if( pCur->eState!=CURSOR_VALID ){
    *pDifferentRow = 1;
  }else{
    assert( pCur->skipNext==0 );
    *pDifferentRow = 0;
  }
  return SQLITE_OK;
}

#ifdef SQLITE_ENABLE_CURSOR_HINTS
/*
................................................................................
*/
SQLITE_PRIVATE u32 sqlite3BtreePayloadSize(BtCursor *pCur){
  assert( cursorHoldsMutex(pCur) );
  assert( pCur->eState==CURSOR_VALID );
  getCellInfo(pCur);
  return pCur->info.nPayload;
}




















/*
** Given the page number of an overflow page in the database (parameter
** ovfl), this function finds the page number of the next page in the 
** linked list of overflow pages. If possible, it uses the auto-vacuum
** pointer-map data instead of reading the content of page ovfl to do so. 
**
................................................................................
        *pRes = -1;
        return SQLITE_OK;
      }
      /* If the requested key is one more than the previous key, then
      ** try to get there using sqlite3BtreeNext() rather than a full
      ** binary search.  This is an optimization only.  The correct answer
      ** is still obtained without this case, only a little more slowely */
      if( pCur->info.nKey+1==intKey && !pCur->skipNext ){
        *pRes = 0;
        rc = sqlite3BtreeNext(pCur, 0);
        if( rc==SQLITE_OK ){
          getCellInfo(pCur);
          if( pCur->info.nKey==intKey ){
            return SQLITE_OK;
          }
................................................................................
*/
static SQLITE_NOINLINE int btreeNext(BtCursor *pCur){
  int rc;
  int idx;
  MemPage *pPage;

  assert( cursorOwnsBtShared(pCur) );
  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  if( pCur->eState!=CURSOR_VALID ){
    assert( (pCur->curFlags & BTCF_ValidOvfl)==0 );
    rc = restoreCursorPosition(pCur);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    if( CURSOR_INVALID==pCur->eState ){
      return SQLITE_DONE;
    }
    if( pCur->skipNext ){
      assert( pCur->eState==CURSOR_VALID || pCur->eState==CURSOR_SKIPNEXT );
      pCur->eState = CURSOR_VALID;
      if( pCur->skipNext>0 ){
        pCur->skipNext = 0;
        return SQLITE_OK;
      }
      pCur->skipNext = 0;
    }
  }

  pPage = pCur->pPage;
  idx = ++pCur->ix;
  if( !pPage->isInit ){
    /* The only known way for this to happen is for there to be a
................................................................................
  }
}
SQLITE_PRIVATE int sqlite3BtreeNext(BtCursor *pCur, int flags){
  MemPage *pPage;
  UNUSED_PARAMETER( flags );  /* Used in COMDB2 but not native SQLite */
  assert( cursorOwnsBtShared(pCur) );
  assert( flags==0 || flags==1 );
  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  pCur->info.nSize = 0;
  pCur->curFlags &= ~(BTCF_ValidNKey|BTCF_ValidOvfl);
  if( pCur->eState!=CURSOR_VALID ) return btreeNext(pCur);
  pPage = pCur->pPage;
  if( (++pCur->ix)>=pPage->nCell ){
    pCur->ix--;
    return btreeNext(pCur);
................................................................................
** use this hint, but COMDB2 does.
*/
static SQLITE_NOINLINE int btreePrevious(BtCursor *pCur){
  int rc;
  MemPage *pPage;

  assert( cursorOwnsBtShared(pCur) );
  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  assert( (pCur->curFlags & (BTCF_AtLast|BTCF_ValidOvfl|BTCF_ValidNKey))==0 );
  assert( pCur->info.nSize==0 );
  if( pCur->eState!=CURSOR_VALID ){
    rc = restoreCursorPosition(pCur);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    if( CURSOR_INVALID==pCur->eState ){
      return SQLITE_DONE;
    }
    if( pCur->skipNext ){
      assert( pCur->eState==CURSOR_VALID || pCur->eState==CURSOR_SKIPNEXT );
      pCur->eState = CURSOR_VALID;
      if( pCur->skipNext<0 ){
        pCur->skipNext = 0;
        return SQLITE_OK;
      }
      pCur->skipNext = 0;
    }
  }

  pPage = pCur->pPage;
  assert( pPage->isInit );
  if( !pPage->leaf ){
    int idx = pCur->ix;
................................................................................
    }
  }
  return rc;
}
SQLITE_PRIVATE int sqlite3BtreePrevious(BtCursor *pCur, int flags){
  assert( cursorOwnsBtShared(pCur) );
  assert( flags==0 || flags==1 );
  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  UNUSED_PARAMETER( flags );  /* Used in COMDB2 but not native SQLite */
  pCur->curFlags &= ~(BTCF_AtLast|BTCF_ValidOvfl|BTCF_ValidNKey);
  pCur->info.nSize = 0;
  if( pCur->eState!=CURSOR_VALID
   || pCur->ix==0
   || pCur->pPage->leaf==0
  ){
................................................................................
**             -----------
**            /     |     \
**           /      |      \
**  ---------   ---------   ---------
**  |Child-1|   |Child-2|   |Child-3|
**  ---------   ---------   ---------
**
** The order of cells is in the array is:
**
**       1.  All cells from Child-1 in order
**       2.  The first divider cell from Parent
**       3.  All cells from Child-2 in order
**       4.  The second divider cell from Parent
**       5.  All cells from Child-3 in order
**



** The apEnd[] array holds pointer to the end of page for Child-1, the
** Parent, Child-2, the Parent (again), and Child-3.  The ixNx[] array
** holds the number of cells contained in each of these 5 stages, and
** all stages to the left.  Hence:

**    ixNx[0] = Number of cells in Child-1.
**    ixNx[1] = Number of cells in Child-1 plus 1 for first divider.
**    ixNx[2] = Number of cells in Child-1 and Child-2 + 1 for 1st divider.
**    ixNx[3] = Number of cells in Child-1 and Child-2 + both divider cells
**    ixNx[4] = Total number of cells.







*/
typedef struct CellArray CellArray;
struct CellArray {
  int nCell;              /* Number of cells in apCell[] */
  MemPage *pRef;          /* Reference page */
  u8 **apCell;            /* All cells begin balanced */
  u16 *szCell;            /* Local size of all cells in apCell[] */
................................................................................
  MemPage *pPg                    /* The page to be reconstructed */
){
  const int hdr = pPg->hdrOffset;          /* Offset of header on pPg */
  u8 * const aData = pPg->aData;           /* Pointer to data for pPg */
  const int usableSize = pPg->pBt->usableSize;
  u8 * const pEnd = &aData[usableSize];
  int i = iFirst;                 /* Which cell to copy from pCArray*/
  int j;                          /* Start of cell content area */
  int iEnd = i+nCell;             /* Loop terminator */
  u8 *pCellptr = pPg->aCellIdx;
  u8 *pTmp = sqlite3PagerTempSpace(pPg->pBt->pPager);
  u8 *pData;
  int k;                          /* Current slot in pCArray->apEnd[] */
  u8 *pSrcEnd;                    /* Current pCArray->apEnd[k] value */

  assert( i<iEnd );
  j = get2byte(&aData[hdr+5]);

  memcpy(&pTmp[j], &aData[j], usableSize - j);

  for(k=0; pCArray->ixNx[k]<=i && ALWAYS(k<NB*2); k++){}
  pSrcEnd = pCArray->apEnd[k];

  pData = pEnd;
  while( 1/*exit by break*/ ){
................................................................................
    assert( pFree>aData && (pFree - aData)<65536 );
    freeSpace(pPg, (u16)(pFree - aData), szFree);
  }
  return nRet;
}

/*
** pCArray contains pointers to and sizes of all cells in the pages being
** balanced.  The current page, pPg, has pPg->nCell cells starting with
** pCArray->apCell[iOld].  After balancing, this page should hold nNew cells
** starting at apCell[iNew].
**
** This routine makes the necessary adjustments to pPg so that it contains
** the correct cells after being balanced.
**
................................................................................

#ifdef SQLITE_DEBUG
  u8 *pTmp = sqlite3PagerTempSpace(pPg->pBt->pPager);
  memcpy(pTmp, aData, pPg->pBt->usableSize);
#endif

  /* Remove cells from the start and end of the page */

  if( iOld<iNew ){
    int nShift = pageFreeArray(pPg, iOld, iNew-iOld, pCArray);

    memmove(pPg->aCellIdx, &pPg->aCellIdx[nShift*2], nCell*2);
    nCell -= nShift;
  }
  if( iNewEnd < iOldEnd ){
    nCell -= pageFreeArray(pPg, iNewEnd, iOldEnd - iNewEnd, pCArray);


  }

  pData = &aData[get2byteNotZero(&aData[hdr+5])];
  if( pData<pBegin ) goto editpage_fail;

  /* Add cells to the start of the page */
  if( iNew<iOld ){
    int nAdd = MIN(nNew,iOld-iNew);
    assert( (iOld-iNew)<nNew || nCell==0 || CORRUPT_DB );

    pCellptr = pPg->aCellIdx;
    memmove(&pCellptr[nAdd*2], pCellptr, nCell*2);
    if( pageInsertArray(
          pPg, pBegin, &pData, pCellptr,
          iNew, nAdd, pCArray
    ) ) goto editpage_fail;
    nCell += nAdd;
................................................................................
  }

  /* Add any overflow cells */
  for(i=0; i<pPg->nOverflow; i++){
    int iCell = (iOld + pPg->aiOvfl[i]) - iNew;
    if( iCell>=0 && iCell<nNew ){
      pCellptr = &pPg->aCellIdx[iCell * 2];

      memmove(&pCellptr[2], pCellptr, (nCell - iCell) * 2);
      nCell++;
      if( pageInsertArray(
            pPg, pBegin, &pData, pCellptr,
            iCell+iNew, 1, pCArray
      ) ) goto editpage_fail;
    }
  }

  /* Append cells to the end of the page */

  pCellptr = &pPg->aCellIdx[nCell*2];
  if( pageInsertArray(
        pPg, pBegin, &pData, pCellptr,
        iNew+nCell, nNew-nCell, pCArray
  ) ) goto editpage_fail;

  pPg->nCell = nNew;
................................................................................
  **    szNew[i]: Spaced used on the i-th sibling page.
  **   cntNew[i]: Index in b.apCell[] and b.szCell[] for the first cell to
  **              the right of the i-th sibling page.
  ** usableSpace: Number of bytes of space available on each sibling.
  ** 
  */
  usableSpace = pBt->usableSize - 12 + leafCorrection;
  for(i=0; i<nOld; i++){
    MemPage *p = apOld[i];
    b.apEnd[i*2] = p->aDataEnd;



    b.apEnd[i*2+1] = pParent->aDataEnd;
    b.ixNx[i*2] = cntOld[i];
    b.ixNx[i*2+1] = cntOld[i]+1;

    szNew[i] = usableSpace - p->nFree;
    for(j=0; j<p->nOverflow; j++){
      szNew[i] += 2 + p->xCellSize(p, p->apOvfl[j]);
    }
    cntNew[i] = cntOld[i];
  }
  k = nOld;
................................................................................
  ** the cursor to the largest entry in the tree that is smaller than
  ** the entry being deleted. This cell will replace the cell being deleted
  ** from the internal node. The 'previous' entry is used for this instead
  ** of the 'next' entry, as the previous entry is always a part of the
  ** sub-tree headed by the child page of the cell being deleted. This makes
  ** balancing the tree following the delete operation easier.  */
  if( !pPage->leaf ){
    pCur->skipNext = 0;
    rc = sqlite3BtreePrevious(pCur, 0);
    assert( rc!=SQLITE_DONE );
    if( rc ) return rc;
  }

  /* Save the positions of any other cursors open on this table before
  ** making any modifications.  */
................................................................................
  BtCursor *pCur,   /* Cursor pointing at record to retrieve. */
  u32 offset,       /* Offset from the start of data to return bytes from. */
  u32 amt,          /* Number of bytes to return. */
  Mem *pMem         /* OUT: Return data in this Mem structure. */
){
  int rc;
  pMem->flags = MEM_Null;



  if( SQLITE_OK==(rc = sqlite3VdbeMemClearAndResize(pMem, amt+1)) ){
    rc = sqlite3BtreePayload(pCur, offset, amt, pMem->z);
    if( rc==SQLITE_OK ){
      pMem->z[amt] = 0;   /* Overrun area used when reading malformed records */
      pMem->flags = MEM_Blob;
      pMem->n = (int)amt;
    }else{
................................................................................
  return p==pWalker->u.pSelect ? WRC_Continue : WRC_Prune;
}
static void gatherSelectWindows(Select *p){
  Walker w;
  w.xExprCallback = gatherSelectWindowsCallback;
  w.xSelectCallback = gatherSelectWindowsSelectCallback;
  w.xSelectCallback2 = 0;

  w.u.pSelect = p;
  sqlite3WalkSelect(&w, p);
}
#endif


/*
................................................................................
  testcase( pExpr->op==TK_AGG_COLUMN );
  testcase( pExpr->op==TK_AGG_FUNCTION );
  if( ExprHasProperty(pExpr, EP_FromJoin) ) return WRC_Prune;
  switch( pExpr->op ){
    case TK_ISNOT:
    case TK_NOT:
    case TK_ISNULL:

    case TK_IS:
    case TK_OR:
    case TK_CASE:
    case TK_IN:
    case TK_FUNCTION:
      testcase( pExpr->op==TK_ISNOT );
      testcase( pExpr->op==TK_NOT );
      testcase( pExpr->op==TK_ISNULL );

      testcase( pExpr->op==TK_IS );
      testcase( pExpr->op==TK_OR );
      testcase( pExpr->op==TK_CASE );
      testcase( pExpr->op==TK_IN );
      testcase( pExpr->op==TK_FUNCTION );
      return WRC_Prune;
    case TK_COLUMN:
................................................................................
      sqlite3_result_error(context, zErr, -1);
      sqlite3_free(zErr);
      return;
    }
    assert( pVfs );
    flags |= SQLITE_OPEN_MAIN_DB;
    rc = sqlite3BtreeOpen(pVfs, zPath, db, &pNew->pBt, 0, flags);
    sqlite3_free( zPath );
    db->nDb++;

  }
  db->noSharedCache = 0;
  if( rc==SQLITE_CONSTRAINT ){
    rc = SQLITE_ERROR;
    zErrDyn = sqlite3MPrintf(db, "database is already attached");
  }else if( rc==SQLITE_OK ){
    Pager *pPager;
................................................................................
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
    sqlite3BtreeSetPagerFlags(pNew->pBt,
                      PAGER_SYNCHRONOUS_FULL | (db->flags & PAGER_FLAGS_MASK));
#endif
    sqlite3BtreeLeave(pNew->pBt);
  }
  pNew->safety_level = SQLITE_DEFAULT_SYNCHRONOUS+1;
  if( !REOPEN_AS_MEMDB(db) ) pNew->zDbSName = sqlite3DbStrDup(db, zName);
  if( rc==SQLITE_OK && pNew->zDbSName==0 ){
    rc = SQLITE_NOMEM_BKPT;
  }


#ifdef SQLITE_HAS_CODEC
  if( rc==SQLITE_OK ){
................................................................................
      case SQLITE_BLOB:
        nKey = sqlite3_value_bytes(argv[2]);
        zKey = (char *)sqlite3_value_blob(argv[2]);
        rc = sqlite3CodecAttach(db, db->nDb-1, zKey, nKey);
        break;

      case SQLITE_NULL:

        /* No key specified.  Use the key from the main database */

        sqlite3CodecGetKey(db, 0, (void**)&zKey, &nKey);
        if( nKey || sqlite3BtreeGetOptimalReserve(db->aDb[0].pBt)>0 ){
          rc = sqlite3CodecAttach(db, db->nDb-1, zKey, nKey);

        }
        break;
    }
  }
#endif


  /* If the file was opened successfully, read the schema for the new database.
  ** If this fails, or if opening the file failed, then close the file and 
  ** remove the entry from the db->aDb[] array. i.e. put everything back the
  ** way we found it.
  */
  if( rc==SQLITE_OK ){
................................................................................
    ** in-memory database structures. 
    */
    assert( pParse->nErr==0 );
    if( db->init.busy ){
      Index *p;
      assert( !IN_SPECIAL_PARSE );
      assert( sqlite3SchemaMutexHeld(db, 0, pIndex->pSchema) );








      p = sqlite3HashInsert(&pIndex->pSchema->idxHash, 
          pIndex->zName, pIndex);
      if( p ){
        assert( p==pIndex );  /* Malloc must have failed */
        sqlite3OomFault(db);
        goto exit_create_index;
      }
      db->mDbFlags |= DBFLAG_SchemaChange;
      if( pTblName!=0 ){
        pIndex->tnum = db->init.newTnum;
      }
    }

    /* If this is the initial CREATE INDEX statement (or CREATE TABLE if the
    ** index is an implied index for a UNIQUE or PRIMARY KEY constraint) then
    ** emit code to allocate the index rootpage on disk and make an entry for
    ** the index in the sqlite_master table and populate the index with
    ** content.  But, do not do this if we are simply reading the sqlite_master
................................................................................
  assert( pSrc!=0 );
  assert( iStart<=pSrc->nSrc );

  /* Allocate additional space if needed */
  if( (u32)pSrc->nSrc+nExtra>pSrc->nAlloc ){
    SrcList *pNew;
    int nAlloc = pSrc->nSrc*2+nExtra;
    int nGot;
    sqlite3 *db = pParse->db;

    if( pSrc->nSrc+nExtra>=SQLITE_MAX_SRCLIST ){
      sqlite3ErrorMsg(pParse, "too many FROM clause terms, max: %d",
                      SQLITE_MAX_SRCLIST);
      return 0;
    }
................................................................................
    pNew = sqlite3DbRealloc(db, pSrc,
               sizeof(*pSrc) + (nAlloc-1)*sizeof(pSrc->a[0]) );
    if( pNew==0 ){
      assert( db->mallocFailed );
      return 0;
    }
    pSrc = pNew;
    nGot = (sqlite3DbMallocSize(db, pNew) - sizeof(*pSrc))/sizeof(pSrc->a[0])+1;
    pSrc->nAlloc = nGot;
  }

  /* Move existing slots that come after the newly inserted slots
  ** out of the way */
  for(i=pSrc->nSrc-1; i>=iStart; i--){
    pSrc->a[i+nExtra] = pSrc->a[i];
  }
................................................................................

  if( !sqlite3SafetyCheckOk(db) ) return SQLITE_MISUSE_BKPT;
  if( zSql==0 ) zSql = "";

  sqlite3_mutex_enter(db->mutex);
  sqlite3Error(db, SQLITE_OK);
  while( rc==SQLITE_OK && zSql[0] ){
    int nCol;
    char **azVals = 0;

    pStmt = 0;
    rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, &zLeftover);
    assert( rc==SQLITE_OK || pStmt==0 );
    if( rc!=SQLITE_OK ){
      continue;
    }
    if( !pStmt ){
      /* this happens for a comment or white-space */
      zSql = zLeftover;
      continue;
    }

    callbackIsInit = 0;
    nCol = sqlite3_column_count(pStmt);

    while( 1 ){
      int i;
      rc = sqlite3_step(pStmt);

      /* Invoke the callback function if required */
      if( xCallback && (SQLITE_ROW==rc || 
          (SQLITE_DONE==rc && !callbackIsInit
                           && db->flags&SQLITE_NullCallback)) ){
        if( !callbackIsInit ){

          azCols = sqlite3DbMallocRaw(db, (2*nCol+1)*sizeof(const char*));
          if( azCols==0 ){
            goto exec_out;
          }
          for(i=0; i<nCol; i++){
            azCols[i] = (char *)sqlite3_column_name(pStmt, i);
            /* sqlite3VdbeSetColName() installs column names as UTF8
................................................................................
#define PragTyp_THREADS                       37
#define PragTyp_WAL_AUTOCHECKPOINT            38
#define PragTyp_WAL_CHECKPOINT                39
#define PragTyp_ACTIVATE_EXTENSIONS           40
#define PragTyp_HEXKEY                        41
#define PragTyp_KEY                           42
#define PragTyp_LOCK_STATUS                   43
#define PragTyp_PARSER_TRACE                  44
#define PragTyp_STATS                         45

/* Property flags associated with various pragma. */
#define PragFlg_NeedSchema 0x01 /* Force schema load before running */
#define PragFlg_NoColumns  0x02 /* OP_ResultRow called with zero columns */
#define PragFlg_NoColumns1 0x04 /* zero columns if RHS argument is present */
#define PragFlg_ReadOnly   0x08 /* Read-only HEADER_VALUE */
#define PragFlg_Result0    0x10 /* Acts as query when no argument */
................................................................................
 {/* zName:     */ "compile_options",
  /* ePragTyp:  */ PragTyp_COMPILE_OPTIONS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "count_changes",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_CountRows },
#endif
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_OS_WIN
#if !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "data_store_directory",
  /* ePragTyp:  */ PragTyp_DATA_STORE_DIRECTORY,
  /* ePragFlg:  */ PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
 {/* zName:     */ "data_version",
  /* ePragTyp:  */ PragTyp_HEADER_VALUE,
  /* ePragFlg:  */ PragFlg_ReadOnly|PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_DATA_VERSION },
................................................................................
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "database_list",
  /* ePragTyp:  */ PragTyp_DATABASE_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 35, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
#if !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "default_cache_size",
  /* ePragTyp:  */ PragTyp_DEFAULT_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 45, 1,
  /* iArg:      */ 0 },
#endif
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "defer_foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_DeferFKs },
#endif
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "empty_result_callbacks",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_NullCallback },
#endif
#endif
#if !defined(SQLITE_OMIT_UTF16)
 {/* zName:     */ "encoding",
  /* ePragTyp:  */ PragTyp_ENCODING,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
 {/* zName:     */ "freelist_count",
  /* ePragTyp:  */ PragTyp_HEADER_VALUE,
  /* ePragFlg:  */ PragFlg_ReadOnly|PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_FREE_PAGE_COUNT },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "full_column_names",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_FullColNames },
#endif
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "fullfsync",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_FullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
................................................................................
  /* iArg:      */ 0 },
 {/* zName:     */ "page_size",
  /* ePragTyp:  */ PragTyp_PAGE_SIZE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif

#if defined(SQLITE_DEBUG) && !defined(SQLITE_OMIT_PARSER_TRACE)
 {/* zName:     */ "parser_trace",
  /* ePragTyp:  */ PragTyp_PARSER_TRACE,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },

#endif
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "pragma_list",
  /* ePragTyp:  */ PragTyp_PRAGMA_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 9, 1,
  /* iArg:      */ 0 },
................................................................................
 {/* zName:     */ "secure_delete",
  /* ePragTyp:  */ PragTyp_SECURE_DELETE,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "short_column_names",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_ShortColNames },
#endif
#endif
 {/* zName:     */ "shrink_memory",
  /* ePragTyp:  */ PragTyp_SHRINK_MEMORY,
  /* ePragFlg:  */ PragFlg_NoColumns,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "soft_heap_limit",
................................................................................
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "temp_store",
  /* ePragTyp:  */ PragTyp_TEMP_STORE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
#if !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "temp_store_directory",
  /* ePragTyp:  */ PragTyp_TEMP_STORE_DIRECTORY,
  /* ePragFlg:  */ PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#endif
#if defined(SQLITE_HAS_CODEC)
 {/* zName:     */ "textkey",
  /* ePragTyp:  */ PragTyp_KEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 4 },
................................................................................
      sqlite3VdbeJumpHere(v, addrTop);
    }
  }
  break;
#endif /* !defined(SQLITE_OMIT_TRIGGER) */
#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */

#ifndef NDEBUG
  case PragTyp_PARSER_TRACE: {
    if( zRight ){
      if( sqlite3GetBoolean(zRight, 0) ){
        sqlite3ParserTrace(stdout, "parser: ");
      }else{
        sqlite3ParserTrace(0, 0);
      }
    }
  }
  break;
#endif

  /* Reinstall the LIKE and GLOB functions.  The variant of LIKE
  ** used will be case sensitive or not depending on the RHS.
  */
  case PragTyp_CASE_SENSITIVE_LIKE: {
    if( zRight ){
      sqlite3RegisterLikeFunctions(db, sqlite3GetBoolean(zRight, 0));
    }
................................................................................
    if( zObj==0 ) zObj = "?";
    z = sqlite3MPrintf(db, "malformed database schema (%s)", zObj);
    if( zExtra && zExtra[0] ) z = sqlite3MPrintf(db, "%z - %s", z, zExtra);
    *pData->pzErrMsg = z;
    pData->rc = SQLITE_CORRUPT_BKPT;
  }
}














/*
** This is the callback routine for the code that initializes the
** database.  See sqlite3Init() below for additional information.
** This routine is also called from the OP_ParseSchema opcode of the VDBE.
**
** Each callback contains the following information:
................................................................................
    ** to do here is record the root page number for that index.
    */
    Index *pIndex;
    pIndex = sqlite3FindIndex(db, argv[0], db->aDb[iDb].zDbSName);
    if( pIndex==0
     || sqlite3GetInt32(argv[1],&pIndex->tnum)==0
     || pIndex->tnum<2

    ){
      corruptSchema(pData, argv[0], pIndex?"invalid rootpage":"orphan index");
    }
  }
  return 0;
}

................................................................................
     && (pTabList->nSrc==1
         || (pTabList->a[1].fg.jointype&(JT_LEFT|JT_CROSS))!=0)
    ){
      continue;
    }

    if( flattenSubquery(pParse, p, i, isAgg) ){

      /* This subquery can be absorbed into its parent. */
      i = -1;
    }
    pTabList = p->pSrc;
    if( db->mallocFailed ) goto select_end;
    if( !IgnorableOrderby(pDest) ){
      sSort.pOrderBy = p->pOrderBy;
................................................................................
  if( db->aVTrans ){
    int i;
    for(i=0; rc==SQLITE_OK && i<db->nVTrans; i++){
      VTable *pVTab = db->aVTrans[i];
      const sqlite3_module *pMod = pVTab->pMod->pModule;
      if( pVTab->pVtab && pMod->iVersion>=2 ){
        int (*xMethod)(sqlite3_vtab *, int);

        switch( op ){
          case SAVEPOINT_BEGIN:
            xMethod = pMod->xSavepoint;
            pVTab->iSavepoint = iSavepoint+1;
            break;
          case SAVEPOINT_ROLLBACK:
            xMethod = pMod->xRollbackTo;
................................................................................
          default:
            xMethod = pMod->xRelease;
            break;
        }
        if( xMethod && pVTab->iSavepoint>iSavepoint ){
          rc = xMethod(pVTab->pVtab, iSavepoint);
        }

      }
    }
  }
  return rc;
}

/*
................................................................................
    ** into reference to index columns.
    **
    ** Do not do this for the RHS of a LEFT JOIN. This is because the 
    ** expression may be evaluated after OP_NullRow has been executed on
    ** the cursor. In this case it is important to do the full evaluation,
    ** as the result of the expression may not be NULL, even if all table
    ** column values are.  https://www.sqlite.org/src/info/7fa8049685b50b5a





    */
    if( pLevel->iLeftJoin==0 ){
      whereIndexExprTrans(pIdx, iCur, iIdxCur, pWInfo);
    }

    /* Record the instruction used to terminate the loop. */
    if( pLoop->wsFlags & WHERE_ONEROW ){
      pLevel->op = OP_Noop;
    }else if( bRev ){
................................................................................
    if( pScan->iEquiv>=pScan->nEquiv ) break;
    pWC = pScan->pOrigWC;
    k = 0;
    pScan->iEquiv++;
  }
  return 0;
}












/*
** Initialize a WHERE clause scanner object.  Return a pointer to the
** first match.  Return NULL if there are no matches.
**
** The scanner will be searching the WHERE clause pWC.  It will look
** for terms of the form "X <op> <expr>" where X is column iColumn of table
................................................................................
  Index *pIdx             /* Must be compatible with this index */
){
  pScan->pOrigWC = pWC;
  pScan->pWC = pWC;
  pScan->pIdxExpr = 0;
  pScan->idxaff = 0;
  pScan->zCollName = 0;





  if( pIdx ){
    int j = iColumn;
    iColumn = pIdx->aiColumn[j];
    if( iColumn==XN_EXPR ){
      pScan->pIdxExpr = pIdx->aColExpr->a[j].pExpr;
      pScan->zCollName = pIdx->azColl[j];


    }else if( iColumn==pIdx->pTable->iPKey ){
      iColumn = XN_ROWID;
    }else if( iColumn>=0 ){
      pScan->idxaff = pIdx->pTable->aCol[iColumn].affinity;
      pScan->zCollName = pIdx->azColl[j];
    }
  }else if( iColumn==XN_EXPR ){
    return 0;
  }
  pScan->opMask = opMask;
  pScan->k = 0;
  pScan->aiCur[0] = iCur;
  pScan->aiColumn[0] = iColumn;
  pScan->nEquiv = 1;
  pScan->iEquiv = 1;
  return whereScanNext(pScan);
}

/*
** Search for a term in the WHERE clause that is of the form "X <op> <expr>"
** where X is a reference to the iColumn of table iCur or of index pIdx
** if pIdx!=0 and <op> is one of the WO_xx operator codes specified by
................................................................................
  mxSqlLen = db->aLimit[SQLITE_LIMIT_SQL_LENGTH];
  if( db->nVdbeActive==0 ){
    db->u1.isInterrupted = 0;
  }
  pParse->rc = SQLITE_OK;
  pParse->zTail = zSql;
  assert( pzErrMsg!=0 );



  /* sqlite3ParserTrace(stdout, "parser: "); */




#ifdef sqlite3Parser_ENGINEALWAYSONSTACK
  pEngine = &sEngine;
  sqlite3ParserInit(pEngine, pParse);
#else
  pEngine = sqlite3ParserAlloc(sqlite3Malloc, pParse);
  if( pEngine==0 ){
    sqlite3OomFault(db);
................................................................................
  Vdbe *pVdbe,       /* VM being reprepared */
  const char *zSql   /* The original SQL string */
){
  sqlite3 *db;       /* The database connection */
  int i;             /* Next unread byte of zSql[] */
  int n;             /* length of current token */
  int tokenType;     /* type of current token */
  int prevType;      /* Previous non-whitespace token */
  int nParen;        /* Number of nested levels of parentheses */
  int iStartIN;      /* Start of RHS of IN operator in z[] */
  int nParenAtIN;    /* Value of nParent at start of RHS of IN operator */
  int j;             /* Bytes of normalized SQL generated so far */
  sqlite3_str *pStr; /* The normalized SQL string under construction */

  db = sqlite3VdbeDb(pVdbe);
................................................................................
        iVal = SQLITE_DEFAULT_SORTERREF_SIZE;
      }
      sqlite3GlobalConfig.szSorterRef = (u32)iVal;
      break;
    }
#endif /* SQLITE_ENABLE_SORTER_REFERENCES */








    default: {
      rc = SQLITE_ERROR;
      break;
    }
  }
  va_end(ap);
  return rc;
................................................................................
    zFile = 0;
  }
  *pFlags = flags;
  *pzFile = zFile;
  return rc;
}




































/*
** This routine does the work of opening a database on behalf of
** sqlite3_open() and sqlite3_open16(). The database filename "zFilename"  
** is UTF-8 encoded.
*/
static int openDatabase(
................................................................................
  if( sqlite3GlobalConfig.xSqllog ){
    /* Opening a db handle. Fourth parameter is passed 0. */
    void *pArg = sqlite3GlobalConfig.pSqllogArg;
    sqlite3GlobalConfig.xSqllog(pArg, db, zFilename, 0);
  }
#endif
#if defined(SQLITE_HAS_CODEC)
  if( rc==SQLITE_OK ){
    const char *zKey;
    if( (zKey = sqlite3_uri_parameter(zOpen, "hexkey"))!=0 && zKey[0] ){
      u8 iByte;
      int i;
      char zDecoded[40];
      for(i=0, iByte=0; i<sizeof(zDecoded)*2 && sqlite3Isxdigit(zKey[i]); i++){
        iByte = (iByte<<4) + sqlite3HexToInt(zKey[i]);
        if( (i&1)!=0 ) zDecoded[i/2] = iByte;
      }
      sqlite3_key_v2(db, 0, zDecoded, i/2);
    }else if( (zKey = sqlite3_uri_parameter(zOpen, "key"))!=0 ){
      sqlite3_key_v2(db, 0, zKey, sqlite3Strlen30(zKey));
    }
  }
#endif
  sqlite3_free(zOpen);
  return rc & 0xff;
}


/*
** Open a new database handle.
*/
SQLITE_API int sqlite3_open(
  const char *zFilename, 
  sqlite3 **ppDb 
................................................................................
    **
    ** Similar padding is added in the fts3DoclistOrMerge() function.
    */
    pTS->aaOutput[0] = sqlite3_malloc(nDoclist + FTS3_VARINT_MAX + 1);
    pTS->anOutput[0] = nDoclist;
    if( pTS->aaOutput[0] ){
      memcpy(pTS->aaOutput[0], aDoclist, nDoclist);

    }else{
      return SQLITE_NOMEM;
    }
  }else{
    char *aMerge = aDoclist;
    int nMerge = nDoclist;
    int iOut;
................................................................................
  if( isScan ) pCsr->filter.flags |= FTS3_SEGMENT_SCAN;

  if( iEq>=0 || iGe>=0 ){
    const unsigned char *zStr = sqlite3_value_text(apVal[0]);
    assert( (iEq==0 && iGe==-1) || (iEq==-1 && iGe==0) );
    if( zStr ){
      pCsr->filter.zTerm = sqlite3_mprintf("%s", zStr);
      pCsr->filter.nTerm = sqlite3_value_bytes(apVal[0]);
      if( pCsr->filter.zTerm==0 ) return SQLITE_NOMEM;

    }
  }

  if( iLe>=0 ){
    pCsr->zStop = sqlite3_mprintf("%s", sqlite3_value_text(apVal[iLe]));
    pCsr->nStop = sqlite3_value_bytes(apVal[iLe]);
    if( pCsr->zStop==0 ) return SQLITE_NOMEM;

  }
  
  if( iLangid>=0 ){
    iLangVal = sqlite3_value_int(apVal[iLangid]);

    /* If the user specified a negative value for the languageid, use zero
    ** instead. This works, as the "languageid=?" constraint will also
................................................................................
  pPhrase->nToken = pExpr->pPhrase->nToken;
  rc = sqlite3Fts3EvalPhrasePoslist(p->pCsr, pExpr, p->iCol, &pCsr);
  assert( rc==SQLITE_OK || pCsr==0 );
  if( pCsr ){
    int iFirst = 0;
    pPhrase->pList = pCsr;
    fts3GetDeltaPosition(&pCsr, &iFirst);
    assert( iFirst>=0 );


    pPhrase->pHead = pCsr;
    pPhrase->pTail = pCsr;
    pPhrase->iHead = iFirst;
    pPhrase->iTail = iFirst;

  }else{
    assert( rc!=SQLITE_OK || (
       pPhrase->pList==0 && pPhrase->pHead==0 && pPhrase->pTail==0 
    ));
  }

  return rc;
................................................................................
      for(ii=0; rc==SQLITE_OK && ii<nInst; ii++){
        int ip, ic, io;
        int iAdj;
        int nScore;
        int jj;

        rc = pApi->xInst(pFts, ii, &ip, &ic, &io);


        if( ic!=i || rc!=SQLITE_OK ) continue;
        memset(aSeen, 0, nPhrase);
        rc = fts5SnippetScore(pApi, pFts, nDocsize, aSeen, i,
            io, nToken, &nScore, &iAdj
        );
        if( rc==SQLITE_OK && nScore>nBestScore ){
          nBestScore = nScore;
          iBestCol = i;
................................................................................
*/
static void fts5SegIterLoadTerm(Fts5Index *p, Fts5SegIter *pIter, int nKeep){
  u8 *a = pIter->pLeaf->p;        /* Buffer to read data from */
  int iOff = pIter->iLeafOffset;  /* Offset to read at */
  int nNew;                       /* Bytes of new data */

  iOff += fts5GetVarint32(&a[iOff], nNew);
  if( iOff+nNew>pIter->pLeaf->szLeaf || nKeep>pIter->term.n ){
    p->rc = FTS5_CORRUPT;
    return;
  }
  pIter->term.n = nKeep;
  fts5BufferAppendBlob(&p->rc, &pIter->term, nNew, &a[iOff]);
  assert( pIter->term.n<=pIter->term.nSpace );
  iOff += nNew;
................................................................................
        }
      }
    }while( 1 );
  }

 search_success:
  pIter->iLeafOffset = iOff + nNew;
  if( pIter->iLeafOffset>n ){
    p->rc = FTS5_CORRUPT;
    return;
  }
  pIter->iTermLeafOffset = pIter->iLeafOffset;
  pIter->iTermLeafPgno = pIter->iLeafPgno;

  fts5BufferSet(&p->rc, &pIter->term, nKeep, pTerm);
................................................................................
*/
static void fts5SegiterPoslist(
  Fts5Index *p,
  Fts5SegIter *pSeg,
  Fts5Colset *pColset,
  Fts5Buffer *pBuf
){
  if( 0==fts5BufferGrow(&p->rc, pBuf, pSeg->nPos) ){

    if( pColset==0 ){
      fts5ChunkIterate(p, pSeg, (void*)pBuf, fts5PoslistCallback);
    }else{
      if( p->pConfig->eDetail==FTS5_DETAIL_FULL ){
        PoslistCallbackCtx sCtx;
        sCtx.pBuf = pBuf;
        sCtx.pColset = pColset;
................................................................................
      int iOff = pSeg->iTermLeafOffset;     /* Offset on new first leaf page */
      i64 iLeafRowid;
      Fts5Data *pData;
      int iId = pSeg->pSeg->iSegid;
      u8 aHdr[4] = {0x00, 0x00, 0x00, 0x00};

      iLeafRowid = FTS5_SEGMENT_ROWID(iId, pSeg->iTermLeafPgno);
      pData = fts5DataRead(p, iLeafRowid);
      if( pData ){
        if( iOff>pData->szLeaf ){
          /* This can occur if the pages that the segments occupy overlap - if
          ** a single page has been assigned to more than one segment. In
          ** this case a prior iteration of this loop may have corrupted the
          ** segment currently being trimmed.  */
          p->rc = FTS5_CORRUPT;
................................................................................
          iRowid += iDelta;
          
          if( writer.bFirstRowidInPage ){
            fts5PutU16(&pBuf->p[0], (u16)pBuf->n);   /* first rowid on page */
            pBuf->n += sqlite3Fts5PutVarint(&pBuf->p[pBuf->n], iRowid);
            writer.bFirstRowidInPage = 0;
            fts5WriteDlidxAppend(p, &writer, iRowid);

          }else{
            pBuf->n += sqlite3Fts5PutVarint(&pBuf->p[pBuf->n], iDelta);
          }
          assert( pBuf->n<=pBuf->nSpace );

          if( eDetail==FTS5_DETAIL_NONE ){
            if( iOff<nDoclist && pDoclist[iOff]==0 ){
................................................................................
static void fts5AppendPoslist(
  Fts5Index *p,
  i64 iDelta,
  Fts5Iter *pMulti,
  Fts5Buffer *pBuf
){
  int nData = pMulti->base.nData;

  assert( nData>0 );
  if( p->rc==SQLITE_OK && 0==fts5BufferGrow(&p->rc, pBuf, nData+9+9) ){
    fts5BufferSafeAppendVarint(pBuf, iDelta);
    fts5BufferSafeAppendVarint(pBuf, nData*2);
    fts5BufferSafeAppendBlob(pBuf, pMulti->base.pData, nData);

  }
}


static void fts5DoclistIterNext(Fts5DoclistIter *pIter){
  u8 *p = pIter->aPoslist + pIter->nSize + pIter->nPoslist;

................................................................................
            if( iPos1<iPos2 ){
              if( iPos1!=iPrev ){
                sqlite3Fts5PoslistSafeAppend(&tmp, &iPrev, iPos1);
              }
              sqlite3Fts5PoslistNext64(a1, i1.nPoslist, &iOff1, &iPos1);
              if( iPos1<0 ) break;
            }else{
              assert( iPos2!=iPrev );
              sqlite3Fts5PoslistSafeAppend(&tmp, &iPrev, iPos2);
              sqlite3Fts5PoslistNext64(a2, i2.nPoslist, &iOff2, &iPos2);
              if( iPos2<0 ) break;
            }
          }
        }

................................................................................
      goto decode_out;
    }
    fts5DecodePoslist(&rc, &s, &a[4], iOff-4);

    /* Decode any more doclist data that appears on the page before the
    ** first term. */
    nDoclist = (iTermOff ? iTermOff : szLeaf) - iOff;




    fts5DecodeDoclist(&rc, &s, &a[iOff], nDoclist);

    while( iPgidxOff<n && rc==SQLITE_OK ){
      int bFirst = (iPgidxOff==szLeaf);     /* True for first term on page */
      int nByte;                            /* Bytes of data */
      int iEnd;
      
................................................................................
      assert( iSavepoint>=0 );
      assert( iSavepoint<=p->ts.iSavepoint );
      p->ts.iSavepoint = iSavepoint-1;
      break;

    case FTS5_ROLLBACKTO:
      assert( p->ts.eState==1 );
      assert( iSavepoint>=0 );
      assert( iSavepoint<=p->ts.iSavepoint );
      p->ts.iSavepoint = iSavepoint;
      break;
  }
}
#else
# define fts5CheckTransactionState(x,y,z)
................................................................................
  Fts5Context *pCtx, 
  int iCol, 
  const char **pz, 
  int *pn
){
  int rc = SQLITE_OK;
  Fts5Cursor *pCsr = (Fts5Cursor*)pCtx;
  if( fts5IsContentless((Fts5FullTable*)(pCsr->base.pVtab)) ){


    *pz = 0;
    *pn = 0;
  }else{
    rc = fts5SeekCursor(pCsr, 0);
    if( rc==SQLITE_OK ){
      *pz = (const char*)sqlite3_column_text(pCsr->pStmt, iCol+1);
      *pn = sqlite3_column_bytes(pCsr->pStmt, iCol+1);
................................................................................
static void fts5SourceIdFunc(
  sqlite3_context *pCtx,          /* Function call context */
  int nArg,                       /* Number of args */
  sqlite3_value **apUnused        /* Function arguments */
){
  assert( nArg==0 );
  UNUSED_PARAM2(nArg, apUnused);
  sqlite3_result_text(pCtx, "fts5: 2019-01-26 23:34:50 a3ea1a822d3a110f4f186f2fc8550f435c8c98635d058096b7be9d4df7066b8b", -1, SQLITE_TRANSIENT);
}

/*
** Return true if zName is the extension on one of the shadow tables used
** by this module.
*/
static int fts5ShadowName(const char *zName){
................................................................................
    if( sqlite3Fts5IterEof(pCsr->pIter) ){
      pCsr->bEof = 1;
    }else{
      const char *zTerm;
      int nTerm;

      zTerm = sqlite3Fts5IterTerm(pCsr->pIter, &nTerm);

      if( pCsr->nLeTerm>=0 ){
        int nCmp = MIN(nTerm, pCsr->nLeTerm);
        int bCmp = memcmp(pCsr->zLeTerm, zTerm, nCmp);
        if( bCmp<0 || (bCmp==0 && pCsr->nLeTerm<nTerm) ){
          pCsr->bEof = 1;
          return SQLITE_OK;
        }
................................................................................
#endif
  return rc;
}
#endif /* SQLITE_CORE */
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_STMTVTAB) */

/************** End of stmt.c ************************************************/
#if __LINE__!=221670
#undef SQLITE_SOURCE_ID
#define SQLITE_SOURCE_ID      "2019-01-27 02:45:32 9cf8ebd141aa2eb661d457624c76433bd9e4abfdef04aa52e28bc169172calt2"
#endif
/* Return the source-id for this library */
SQLITE_API const char *sqlite3_sourceid(void){ return SQLITE_SOURCE_ID; }
/************************** End of sqlite3.c ******************************/

/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.27.1.  By combining all the individual C code files into this
** single large file, the entire code can be compiled as a single translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% or more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
................................................................................
** been edited in any way since it was last checked in, then the last
** four hexadecimal digits of the hash may be modified.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.27.1"
#define SQLITE_VERSION_NUMBER 3027001
#define SQLITE_SOURCE_ID      "2019-02-08 13:17:39 0eca3dd3d38b31c92b49ca2d311128b74584714d9e7de895b1a6286ef959a1dd"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
** than the configured sorter-reference size threshold - then a reference
** is stored in each sorted record and the required column values loaded
** from the database as records are returned in sorted order. The default
** value for this option is to never use this optimization. Specifying a 
** negative value for this option restores the default behaviour.
** This option is only available if SQLite is compiled with the
** [SQLITE_ENABLE_SORTER_REFERENCES] compile-time option.
**
** [[SQLITE_CONFIG_MEMDB_MAXSIZE]]
** <dt>SQLITE_CONFIG_MEMDB_MAXSIZE
** <dd>The SQLITE_CONFIG_MEMDB_MAXSIZE option accepts a single parameter
** [sqlite3_int64] parameter which is the default maximum size for an in-memory
** database created using [sqlite3_deserialize()].  This default maximum
** size can be adjusted up or down for individual databases using the
** [SQLITE_FCNTL_SIZE_LIMIT] [sqlite3_file_control|file-control].  If this
** configuration setting is never used, then the default maximum is determined
** by the [SQLITE_MEMDB_DEFAULT_MAXSIZE] compile-time option.  If that
** compile-time option is not set, then the default maximum is 1073741824.
** </dl>
*/
#define SQLITE_CONFIG_SINGLETHREAD  1  /* nil */
#define SQLITE_CONFIG_MULTITHREAD   2  /* nil */
#define SQLITE_CONFIG_SERIALIZED    3  /* nil */
#define SQLITE_CONFIG_MALLOC        4  /* sqlite3_mem_methods* */
#define SQLITE_CONFIG_GETMALLOC     5  /* sqlite3_mem_methods* */
................................................................................
#define SQLITE_CONFIG_MMAP_SIZE    22  /* sqlite3_int64, sqlite3_int64 */
#define SQLITE_CONFIG_WIN32_HEAPSIZE      23  /* int nByte */
#define SQLITE_CONFIG_PCACHE_HDRSZ        24  /* int *psz */
#define SQLITE_CONFIG_PMASZ               25  /* unsigned int szPma */
#define SQLITE_CONFIG_STMTJRNL_SPILL      26  /* int nByte */
#define SQLITE_CONFIG_SMALL_MALLOC        27  /* boolean */
#define SQLITE_CONFIG_SORTERREF_SIZE      28  /* int nByte */
#define SQLITE_CONFIG_MEMDB_MAXSIZE       29  /* sqlite3_int64 */

/*
** CAPI3REF: Database Connection Configuration Options
**
** These constants are the available integer configuration options that
** can be passed as the second argument to the [sqlite3_db_config()] interface.
**
................................................................................
** zero is returned.
** 
** If F is a NULL pointer, then sqlite3_uri_parameter(F,P) returns NULL and
** sqlite3_uri_boolean(F,P,B) returns B.  If F is not a NULL pointer and
** is not a database file pathname pointer that SQLite passed into the xOpen
** VFS method, then the behavior of this routine is undefined and probably
** undesirable.
**
** See the [URI filename] documentation for additional information.
*/
SQLITE_API const char *sqlite3_uri_parameter(const char *zFilename, const char *zParam);
SQLITE_API int sqlite3_uri_boolean(const char *zFile, const char *zParam, int bDefault);
SQLITE_API sqlite3_int64 sqlite3_uri_int64(const char*, const char*, sqlite3_int64);


/*
................................................................................
SQLITE_PRIVATE i64 sqlite3BtreeIntegerKey(BtCursor*);
#ifdef SQLITE_ENABLE_OFFSET_SQL_FUNC
SQLITE_PRIVATE i64 sqlite3BtreeOffset(BtCursor*);
#endif
SQLITE_PRIVATE int sqlite3BtreePayload(BtCursor*, u32 offset, u32 amt, void*);
SQLITE_PRIVATE const void *sqlite3BtreePayloadFetch(BtCursor*, u32 *pAmt);
SQLITE_PRIVATE u32 sqlite3BtreePayloadSize(BtCursor*);
SQLITE_PRIVATE sqlite3_int64 sqlite3BtreeMaxRecordSize(BtCursor*);

SQLITE_PRIVATE char *sqlite3BtreeIntegrityCheck(Btree*, int *aRoot, int nRoot, int, int*);
SQLITE_PRIVATE struct Pager *sqlite3BtreePager(Btree*);
SQLITE_PRIVATE i64 sqlite3BtreeRowCountEst(BtCursor*);

#ifndef SQLITE_OMIT_INCRBLOB
SQLITE_PRIVATE int sqlite3BtreePayloadChecked(BtCursor*, u32 offset, u32 amt, void*);
................................................................................
#define HI(X)  ((u64)(X)<<32)
#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace       HI(0x0001)  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    HI(0x0002)  /* Debug listings of VDBE progs */
#define SQLITE_VdbeTrace      HI(0x0004)  /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace HI(0x0008)  /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_VdbeEQP        HI(0x0010)  /* Debug EXPLAIN QUERY PLAN */
#define SQLITE_ParserTrace    HI(0x0020)  /* PRAGMA parser_trace=ON */
#endif

/*
** Allowed values for sqlite3.mDbFlags
*/
#define DBFLAG_SchemaChange   0x0001  /* Uncommitted Hash table changes */
#define DBFLAG_PreferBuiltin  0x0002  /* Preference to built-in funcs */
................................................................................
#ifdef SQLITE_VDBE_COVERAGE
  /* The following callback (if not NULL) is invoked on every VDBE branch
  ** operation.  Set the callback using SQLITE_TESTCTRL_VDBE_COVERAGE.
  */
  void (*xVdbeBranch)(void*,unsigned iSrcLine,u8 eThis,u8 eMx);  /* Callback */
  void *pVdbeBranchArg;                                     /* 1st argument */
#endif
#ifdef SQLITE_ENABLE_DESERIALIZE
  sqlite3_int64 mxMemdbSize;        /* Default max memdb size */
#endif
#ifndef SQLITE_UNTESTABLE
  int (*xTestCallback)(int);        /* Invoked by sqlite3FaultSim() */
#endif
  int bLocaltimeFault;              /* True to fail localtime() calls */
  int bInternalFunctions;           /* Internal SQL functions are visible */
  int iOnceResetThreshold;          /* When to reset OP_Once counters */
  u32 szSorterRef;                  /* Min size in bytes to use sorter-refs */
................................................................................
SQLITE_PRIVATE ExprList *sqlite3ExprListAppend(Parse*,ExprList*,Expr*);
SQLITE_PRIVATE ExprList *sqlite3ExprListAppendVector(Parse*,ExprList*,IdList*,Expr*);
SQLITE_PRIVATE void sqlite3ExprListSetSortOrder(ExprList*,int);
SQLITE_PRIVATE void sqlite3ExprListSetName(Parse*,ExprList*,Token*,int);
SQLITE_PRIVATE void sqlite3ExprListSetSpan(Parse*,ExprList*,const char*,const char*);
SQLITE_PRIVATE void sqlite3ExprListDelete(sqlite3*, ExprList*);
SQLITE_PRIVATE u32 sqlite3ExprListFlags(const ExprList*);
SQLITE_PRIVATE int sqlite3IndexHasDuplicateRootPage(Index*);
SQLITE_PRIVATE int sqlite3Init(sqlite3*, char**);
SQLITE_PRIVATE int sqlite3InitCallback(void*, int, char**, char**);
SQLITE_PRIVATE int sqlite3InitOne(sqlite3*, int, char**, u32);
SQLITE_PRIVATE void sqlite3Pragma(Parse*,Token*,Token*,Token*,int);
#ifndef SQLITE_OMIT_VIRTUALTABLE
SQLITE_PRIVATE Module *sqlite3PragmaVtabRegister(sqlite3*,const char *zName);
#endif
................................................................................
SQLITE_PRIVATE void sqlite3AddPrimaryKey(Parse*, ExprList*, int, int, int);
SQLITE_PRIVATE void sqlite3AddCheckConstraint(Parse*, Expr*);
SQLITE_PRIVATE void sqlite3AddDefaultValue(Parse*,Expr*,const char*,const char*);
SQLITE_PRIVATE void sqlite3AddCollateType(Parse*, Token*);
SQLITE_PRIVATE void sqlite3EndTable(Parse*,Token*,Token*,u8,Select*);
SQLITE_PRIVATE int sqlite3ParseUri(const char*,const char*,unsigned int*,
                    sqlite3_vfs**,char**,char **);
#ifdef SQLITE_HAS_CODEC
SQLITE_PRIVATE   int sqlite3CodecQueryParameters(sqlite3*,const char*,const char*);
#else
# define sqlite3CodecQueryParameters(A,B,C) 0
#endif
SQLITE_PRIVATE Btree *sqlite3DbNameToBtree(sqlite3*,const char*);

#ifdef SQLITE_UNTESTABLE
# define sqlite3FaultSim(X) SQLITE_OK
#else
SQLITE_PRIVATE   int sqlite3FaultSim(int);
#endif
................................................................................
** sqlite3_db_config(db, SQLITE_DBCONFIG_LOOKASIDE);
*/
#ifndef SQLITE_DEFAULT_LOOKASIDE
# define SQLITE_DEFAULT_LOOKASIDE 1200,100
#endif


/* The default maximum size of an in-memory database created using
** sqlite3_deserialize()
*/
#ifndef SQLITE_MEMDB_DEFAULT_MAXSIZE
# define SQLITE_MEMDB_DEFAULT_MAXSIZE 1073741824
#endif

/*
** The following singleton contains the global configuration for
** the SQLite library.
*/
SQLITE_PRIVATE SQLITE_WSD struct Sqlite3Config sqlite3Config = {
   SQLITE_DEFAULT_MEMSTATUS,  /* bMemstat */
   1,                         /* bCoreMutex */
................................................................................
   0,                         /* xSqllog */
   0,                         /* pSqllogArg */
#endif
#ifdef SQLITE_VDBE_COVERAGE
   0,                         /* xVdbeBranch */
   0,                         /* pVbeBranchArg */
#endif
#ifdef SQLITE_ENABLE_DESERIALIZE
   SQLITE_MEMDB_DEFAULT_MAXSIZE,   /* mxMemdbSize */
#endif
#ifndef SQLITE_UNTESTABLE
   0,                         /* xTestCallback */
#endif
   0,                         /* bLocaltimeFault */
   0,                         /* bInternalFunctions */
   0x7ffffffe,                /* iOnceResetThreshold */
   SQLITE_DEFAULT_SORTERREF_SIZE,   /* szSorterRef */
};

/*
** Hash table for global functions - functions common to all
** database connections.  After initialization, this table is
** read-only.
*/
................................................................................
  return sqlite3_value_double(p->apArg[p->nUsed++]);
}
static char *getTextArg(PrintfArguments *p){
  if( p->nArg<=p->nUsed ) return 0;
  return (char*)sqlite3_value_text(p->apArg[p->nUsed++]);
}

/*
** Allocate memory for a temporary buffer needed for printf rendering.
**
** If the requested size of the temp buffer is larger than the size
** of the output buffer in pAccum, then cause an SQLITE_TOOBIG error.
** Do the size check before the memory allocation to prevent rogue
** SQL from requesting large allocations using the precision or width
** field of the printf() function.
*/
static char *printfTempBuf(sqlite3_str *pAccum, sqlite3_int64 n){
  char *z;
  if( n>pAccum->nAlloc && n>pAccum->mxAlloc ){
    setStrAccumError(pAccum, SQLITE_TOOBIG);
    return 0;
  }
  z = sqlite3DbMallocRaw(pAccum->db, n);
  if( z==0 ){
    setStrAccumError(pAccum, SQLITE_NOMEM);
  }
  return z;
}

/*
** On machines with a small stack size, you can redefine the
** SQLITE_PRINT_BUF_SIZE to be something smaller, if desired.
*/
#ifndef SQLITE_PRINT_BUF_SIZE
# define SQLITE_PRINT_BUF_SIZE 70
................................................................................
      sqlite3_str_append(pAccum, "%", 1);
      break;
    }
    /* Find out what flags are present */
    flag_leftjustify = flag_prefix = cThousand =
     flag_alternateform = flag_altform2 = flag_zeropad = 0;
    done = 0;
    width = 0;
    flag_long = 0;
    precision = -1;
    do{
      switch( c ){
        case '-':   flag_leftjustify = 1;     break;
        case '+':   flag_prefix = '+';        break;
        case ' ':   flag_prefix = ' ';        break;
        case '#':   flag_alternateform = 1;   break;
        case '!':   flag_altform2 = 1;        break;
        case '0':   flag_zeropad = 1;         break;
        case ',':   cThousand = ',';          break;
        default:    done = 1;                 break;



        case 'l': {
          flag_long = 1;
          c = *++fmt;
          if( c=='l' ){



            c = *++fmt;
            flag_long = 2;
          }

          done = 1;

          break;
        }
        case '1': case '2': case '3': case '4': case '5':
        case '6': case '7': case '8': case '9': {
          unsigned wx = c - '0';
          while( (c = *++fmt)>='0' && c<='9' ){
            wx = wx*10 + c - '0';

          }
          testcase( wx>0x7fffffff );
          width = wx & 0x7fffffff;
#ifdef SQLITE_PRINTF_PRECISION_LIMIT
          if( width>SQLITE_PRINTF_PRECISION_LIMIT ){
            width = SQLITE_PRINTF_PRECISION_LIMIT;
          }
#endif
          if( c!='.' && c!='l' ){
            done = 1;
          }else{
            fmt--;
          }
          break;
        }
        case '*': {
          if( bArgList ){
            width = (int)getIntArg(pArgList);
          }else{
            width = va_arg(ap,int);
          }
          if( width<0 ){
            flag_leftjustify = 1;
            width = width >= -2147483647 ? -width : 0;
          }
#ifdef SQLITE_PRINTF_PRECISION_LIMIT
          if( width>SQLITE_PRINTF_PRECISION_LIMIT ){
            width = SQLITE_PRINTF_PRECISION_LIMIT;
          }
#endif
          if( (c = fmt[1])!='.' && c!='l' ){
            c = *++fmt;
            done = 1;
          }


          break;
        }
        case '.': {
          c = *++fmt;
          if( c=='*' ){
            if( bArgList ){
              precision = (int)getIntArg(pArgList);
            }else{
              precision = va_arg(ap,int);
            }

            if( precision<0 ){
              precision = precision >= -2147483647 ? -precision : -1;
            }
            c = *++fmt;
          }else{
            unsigned px = 0;
            while( c>='0' && c<='9' ){
              px = px*10 + c - '0';
              c = *++fmt;
            }
            testcase( px>0x7fffffff );
            precision = px & 0x7fffffff;
          }




#ifdef SQLITE_PRINTF_PRECISION_LIMIT
          if( precision>SQLITE_PRINTF_PRECISION_LIMIT ){
            precision = SQLITE_PRINTF_PRECISION_LIMIT;
          }
#endif
          if( c=='l' ){
            --fmt;
          }else{
            done = 1;
          }
          break;
        }







      }


    }while( !done && (c=(*++fmt))!=0 );

    /* Fetch the info entry for the field */
    infop = &fmtinfo[0];
    xtype = etINVALID;
    for(idx=0; idx<ArraySize(fmtinfo); idx++){
      if( c==fmtinfo[idx].fmttype ){
        infop = &fmtinfo[idx];
        xtype = infop->type;
................................................................................
        if( flag_zeropad && precision<width-(prefix!=0) ){
          precision = width-(prefix!=0);
        }
        if( precision<etBUFSIZE-10-etBUFSIZE/3 ){
          nOut = etBUFSIZE;
          zOut = buf;
        }else{
          u64 n;
          n = (u64)precision + 10;
          if( cThousand ) n += precision/3;
          zOut = zExtra = printfTempBuf(pAccum, n);
          if( zOut==0 ) return;

          nOut = (int)n;
        }
        bufpt = &zOut[nOut-1];
        if( xtype==etORDINAL ){
          static const char zOrd[] = "thstndrd";
          int x = (int)(longvalue % 10);
          if( x>=4 || (longvalue/10)%10==1 ){
................................................................................
          flag_rtz = flag_altform2;
        }
        if( xtype==etEXP ){
          e2 = 0;
        }else{
          e2 = exp;
        }
        {
          i64 szBufNeeded;           /* Size of a temporary buffer needed */
          szBufNeeded = MAX(e2,0)+(i64)precision+(i64)width+15;
          if( szBufNeeded > etBUFSIZE ){
            bufpt = zExtra = printfTempBuf(pAccum, szBufNeeded);
            if( bufpt==0 ) return;
          }
        }
        zOut = bufpt;
        nsd = 16 + flag_altform2*10;
        flag_dp = (precision>0 ?1:0) | flag_alternateform | flag_altform2;
        /* The sign in front of the number */
        if( prefix ){
................................................................................
          if( flag_altform2 && (ch&0xc0)==0xc0 ){
            while( (escarg[i+1]&0xc0)==0x80 ){ i++; }
          }
        }
        needQuote = !isnull && xtype==etSQLESCAPE2;
        n += i + 3;
        if( n>etBUFSIZE ){
          bufpt = zExtra = printfTempBuf(pAccum, n);
          if( bufpt==0 ) return;



        }else{
          bufpt = buf;
        }
        j = 0;
        if( needQuote ) bufpt[j++] = q;
        k = i;
        for(i=0; i<k; i++){
................................................................................
  sqlite3_int64 szMax;            /* Maximum allowed size of the file */
  unsigned char *aData;           /* content of the file */
  int nMmap;                      /* Number of memory mapped pages */
  unsigned mFlags;                /* Flags */
  int eLock;                      /* Most recent lock against this file */
};






/*
** Methods for MemFile
*/
static int memdbClose(sqlite3_file*);
static int memdbRead(sqlite3_file*, void*, int iAmt, sqlite3_int64 iOfst);
static int memdbWrite(sqlite3_file*,const void*,int iAmt, sqlite3_int64 iOfst);
static int memdbTruncate(sqlite3_file*, sqlite3_int64 size);
................................................................................
  sqlite3_file *pFile,
  sqlite3_int64 iOfst,
  int iAmt,
  void **pp
){
  MemFile *p = (MemFile *)pFile;
  if( iOfst+iAmt>p->sz ){

    *pp = 0;
  }else{
    p->nMmap++;
    *pp = (void*)(p->aData + iOfst);
  }
  return SQLITE_OK;
}
................................................................................
    return ORIGVFS(pVfs)->xOpen(ORIGVFS(pVfs), zName, pFile, flags, pOutFlags);
  }
  memset(p, 0, sizeof(*p));
  p->mFlags = SQLITE_DESERIALIZE_RESIZEABLE | SQLITE_DESERIALIZE_FREEONCLOSE;
  assert( pOutFlags!=0 );  /* True because flags==SQLITE_OPEN_MAIN_DB */
  *pOutFlags = flags | SQLITE_OPEN_MEMORY;
  p->base.pMethods = &memdb_io_methods;
  p->szMax = sqlite3GlobalConfig.mxMemdbSize;
  return SQLITE_OK;
}

#if 0 /* Only used to delete rollback journals, master journals, and WAL
      ** files, none of which exist in memdb.  So this routine is never used */
/*
** Delete the file located at zPath. If the dirSync argument is true,
................................................................................
  if( p==0 ){
    rc = SQLITE_ERROR;
  }else{
    p->aData = pData;
    p->sz = szDb;
    p->szAlloc = szBuf;
    p->szMax = szBuf;
    if( p->szMax<sqlite3GlobalConfig.mxMemdbSize ){
      p->szMax = sqlite3GlobalConfig.mxMemdbSize;
    }
    p->mFlags = mFlags;
    rc = SQLITE_OK;
  }

end_deserialize:
  sqlite3_finalize(pStmt);
................................................................................
typedef struct PGroup PGroup;

/*
** Each cache entry is represented by an instance of the following 
** structure. Unless SQLITE_PCACHE_SEPARATE_HEADER is defined, a buffer of
** PgHdr1.pCache->szPage bytes is allocated directly before this structure 
** in memory.
**
** Note: Variables isBulkLocal and isAnchor were once type "u8". That works,
** but causes a 2-byte gap in the structure for most architectures (since 
** pointers must be either 4 or 8-byte aligned). As this structure is located
** in memory directly after the associated page data, if the database is
** corrupt, code at the b-tree layer may overread the page buffer and 
** read part of this structure before the corruption is detected. This
** can cause a valgrind error if the unitialized gap is accessed. Using u16
** ensures there is no such gap, and therefore no bytes of unitialized memory
** in the structure.
*/
struct PgHdr1 {
  sqlite3_pcache_page page;      /* Base class. Must be first. pBuf & pExtra */
  unsigned int iKey;             /* Key value (page number) */
  u16 isBulkLocal;               /* This page from bulk local storage */
  u16 isAnchor;                  /* This is the PGroup.lru element */
  PgHdr1 *pNext;                 /* Next in hash table chain */
  PCache1 *pCache;               /* Cache that currently owns this page */
  PgHdr1 *pLruNext;              /* Next in LRU list of unpinned pages */
  PgHdr1 *pLruPrev;              /* Previous in LRU list of unpinned pages */
                                 /* NB: pLruPrev is only valid if pLruNext!=0 */
};

................................................................................
    do{
      PgHdr1 *pX = (PgHdr1*)&zBulk[pCache->szPage];
      pX->page.pBuf = zBulk;
      pX->page.pExtra = &pX[1];
      pX->isBulkLocal = 1;
      pX->isAnchor = 0;
      pX->pNext = pCache->pFree;
      pX->pLruPrev = 0;           /* Initializing this saves a valgrind error */
      pCache->pFree = pX;
      zBulk += pCache->szAlloc;
    }while( --nBulk );
  }
  return pCache->pFree!=0;
}

................................................................................
** but cursors cannot be shared.  Each cursor is associated with a
** particular database connection identified BtCursor.pBtree.db.
**
** Fields in this structure are accessed under the BtShared.mutex
** found at self->pBt->mutex. 
**
** skipNext meaning:
** The meaning of skipNext depends on the value of eState:
**
**   eState            Meaning of skipNext
**   VALID             skipNext is meaningless and is ignored
**   INVALID           skipNext is meaningless and is ignored
**   SKIPNEXT          sqlite3BtreeNext() is a no-op if skipNext>0 and
**                     sqlite3BtreePrevious() is no-op if skipNext<0.

**   REQUIRESEEK       restoreCursorPosition() restores the cursor to
**                     eState=SKIPNEXT if skipNext!=0
**   FAULT             skipNext holds the cursor fault error code.
*/
struct BtCursor {
  u8 eState;                /* One of the CURSOR_XXX constants (see below) */
  u8 curFlags;              /* zero or more BTCF_* flags defined below */
  u8 curPagerFlags;         /* Flags to send to sqlite3PagerGet() */
  u8 hints;                 /* As configured by CursorSetHints() */
  int skipNext;    /* Prev() is noop if negative. Next() is noop if positive.
................................................................................
  }
  pCur->eState = CURSOR_INVALID;
  rc = btreeMoveto(pCur, pCur->pKey, pCur->nKey, 0, &skipNext);
  if( rc==SQLITE_OK ){
    sqlite3_free(pCur->pKey);
    pCur->pKey = 0;
    assert( pCur->eState==CURSOR_VALID || pCur->eState==CURSOR_INVALID );
    if( skipNext ) pCur->skipNext = skipNext;
    if( pCur->skipNext && pCur->eState==CURSOR_VALID ){
      pCur->eState = CURSOR_SKIPNEXT;
    }
  }
  return rc;
}

................................................................................
  if( rc ){
    *pDifferentRow = 1;
    return rc;
  }
  if( pCur->eState!=CURSOR_VALID ){
    *pDifferentRow = 1;
  }else{

    *pDifferentRow = 0;
  }
  return SQLITE_OK;
}

#ifdef SQLITE_ENABLE_CURSOR_HINTS
/*
................................................................................
*/
SQLITE_PRIVATE u32 sqlite3BtreePayloadSize(BtCursor *pCur){
  assert( cursorHoldsMutex(pCur) );
  assert( pCur->eState==CURSOR_VALID );
  getCellInfo(pCur);
  return pCur->info.nPayload;
}

/*
** Return an upper bound on the size of any record for the table
** that the cursor is pointing into.
**
** This is an optimization.  Everything will still work if this
** routine always returns 2147483647 (which is the largest record
** that SQLite can handle) or more.  But returning a smaller value might
** prevent large memory allocations when trying to interpret a
** corrupt datrabase.
**
** The current implementation merely returns the size of the underlying
** database file.
*/
SQLITE_PRIVATE sqlite3_int64 sqlite3BtreeMaxRecordSize(BtCursor *pCur){
  assert( cursorHoldsMutex(pCur) );
  assert( pCur->eState==CURSOR_VALID );
  return pCur->pBt->pageSize * (sqlite3_int64)pCur->pBt->nPage;
}

/*
** Given the page number of an overflow page in the database (parameter
** ovfl), this function finds the page number of the next page in the 
** linked list of overflow pages. If possible, it uses the auto-vacuum
** pointer-map data instead of reading the content of page ovfl to do so. 
**
................................................................................
        *pRes = -1;
        return SQLITE_OK;
      }
      /* If the requested key is one more than the previous key, then
      ** try to get there using sqlite3BtreeNext() rather than a full
      ** binary search.  This is an optimization only.  The correct answer
      ** is still obtained without this case, only a little more slowely */
      if( pCur->info.nKey+1==intKey ){
        *pRes = 0;
        rc = sqlite3BtreeNext(pCur, 0);
        if( rc==SQLITE_OK ){
          getCellInfo(pCur);
          if( pCur->info.nKey==intKey ){
            return SQLITE_OK;
          }
................................................................................
*/
static SQLITE_NOINLINE int btreeNext(BtCursor *pCur){
  int rc;
  int idx;
  MemPage *pPage;

  assert( cursorOwnsBtShared(pCur) );

  if( pCur->eState!=CURSOR_VALID ){
    assert( (pCur->curFlags & BTCF_ValidOvfl)==0 );
    rc = restoreCursorPosition(pCur);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    if( CURSOR_INVALID==pCur->eState ){
      return SQLITE_DONE;
    }

    if( pCur->eState==CURSOR_SKIPNEXT ){
      pCur->eState = CURSOR_VALID;
      if( pCur->skipNext>0 ) return SQLITE_OK;




    }
  }

  pPage = pCur->pPage;
  idx = ++pCur->ix;
  if( !pPage->isInit ){
    /* The only known way for this to happen is for there to be a
................................................................................
  }
}
SQLITE_PRIVATE int sqlite3BtreeNext(BtCursor *pCur, int flags){
  MemPage *pPage;
  UNUSED_PARAMETER( flags );  /* Used in COMDB2 but not native SQLite */
  assert( cursorOwnsBtShared(pCur) );
  assert( flags==0 || flags==1 );

  pCur->info.nSize = 0;
  pCur->curFlags &= ~(BTCF_ValidNKey|BTCF_ValidOvfl);
  if( pCur->eState!=CURSOR_VALID ) return btreeNext(pCur);
  pPage = pCur->pPage;
  if( (++pCur->ix)>=pPage->nCell ){
    pCur->ix--;
    return btreeNext(pCur);
................................................................................
** use this hint, but COMDB2 does.
*/
static SQLITE_NOINLINE int btreePrevious(BtCursor *pCur){
  int rc;
  MemPage *pPage;

  assert( cursorOwnsBtShared(pCur) );

  assert( (pCur->curFlags & (BTCF_AtLast|BTCF_ValidOvfl|BTCF_ValidNKey))==0 );
  assert( pCur->info.nSize==0 );
  if( pCur->eState!=CURSOR_VALID ){
    rc = restoreCursorPosition(pCur);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    if( CURSOR_INVALID==pCur->eState ){
      return SQLITE_DONE;
    }
    if( CURSOR_SKIPNEXT==pCur->eState ){

      pCur->eState = CURSOR_VALID;
      if( pCur->skipNext<0 ) return SQLITE_OK;




    }
  }

  pPage = pCur->pPage;
  assert( pPage->isInit );
  if( !pPage->leaf ){
    int idx = pCur->ix;
................................................................................
    }
  }
  return rc;
}
SQLITE_PRIVATE int sqlite3BtreePrevious(BtCursor *pCur, int flags){
  assert( cursorOwnsBtShared(pCur) );
  assert( flags==0 || flags==1 );

  UNUSED_PARAMETER( flags );  /* Used in COMDB2 but not native SQLite */
  pCur->curFlags &= ~(BTCF_AtLast|BTCF_ValidOvfl|BTCF_ValidNKey);
  pCur->info.nSize = 0;
  if( pCur->eState!=CURSOR_VALID
   || pCur->ix==0
   || pCur->pPage->leaf==0
  ){
................................................................................
**             -----------
**            /     |     \
**           /      |      \
**  ---------   ---------   ---------
**  |Child-1|   |Child-2|   |Child-3|
**  ---------   ---------   ---------
**
** The order of cells is in the array is for an index btree is:
**
**       1.  All cells from Child-1 in order
**       2.  The first divider cell from Parent
**       3.  All cells from Child-2 in order
**       4.  The second divider cell from Parent
**       5.  All cells from Child-3 in order
**
** For a table-btree (with rowids) the items 2 and 4 are empty because
** content exists only in leaves and there are no divider cells.
**
** For an index btree, the apEnd[] array holds pointer to the end of page
** for Child-1, the Parent, Child-2, the Parent (again), and Child-3,
** respectively. The ixNx[] array holds the number of cells contained in
** each of these 5 stages, and all stages to the left.  Hence:
**
**    ixNx[0] = Number of cells in Child-1.
**    ixNx[1] = Number of cells in Child-1 plus 1 for first divider.
**    ixNx[2] = Number of cells in Child-1 and Child-2 + 1 for 1st divider.
**    ixNx[3] = Number of cells in Child-1 and Child-2 + both divider cells
**    ixNx[4] = Total number of cells.
**
** For a table-btree, the concept is similar, except only apEnd[0]..apEnd[2]
** are used and they point to the leaf pages only, and the ixNx value are:
**
**    ixNx[0] = Number of cells in Child-1.
**    ixNx[1] = Number of cells in Child-1 and Child-2 + 1 for 1st divider.
**    ixNx[2] = Number of cells in Child-1 and Child-2 + both divider cells
*/
typedef struct CellArray CellArray;
struct CellArray {
  int nCell;              /* Number of cells in apCell[] */
  MemPage *pRef;          /* Reference page */
  u8 **apCell;            /* All cells begin balanced */
  u16 *szCell;            /* Local size of all cells in apCell[] */
................................................................................
  MemPage *pPg                    /* The page to be reconstructed */
){
  const int hdr = pPg->hdrOffset;          /* Offset of header on pPg */
  u8 * const aData = pPg->aData;           /* Pointer to data for pPg */
  const int usableSize = pPg->pBt->usableSize;
  u8 * const pEnd = &aData[usableSize];
  int i = iFirst;                 /* Which cell to copy from pCArray*/
  u32 j;                          /* Start of cell content area */
  int iEnd = i+nCell;             /* Loop terminator */
  u8 *pCellptr = pPg->aCellIdx;
  u8 *pTmp = sqlite3PagerTempSpace(pPg->pBt->pPager);
  u8 *pData;
  int k;                          /* Current slot in pCArray->apEnd[] */
  u8 *pSrcEnd;                    /* Current pCArray->apEnd[k] value */

  assert( i<iEnd );
  j = get2byte(&aData[hdr+5]);
  if( NEVER(j>(u32)usableSize) ){ j = 0; }
  memcpy(&pTmp[j], &aData[j], usableSize - j);

  for(k=0; pCArray->ixNx[k]<=i && ALWAYS(k<NB*2); k++){}
  pSrcEnd = pCArray->apEnd[k];

  pData = pEnd;
  while( 1/*exit by break*/ ){
................................................................................
    assert( pFree>aData && (pFree - aData)<65536 );
    freeSpace(pPg, (u16)(pFree - aData), szFree);
  }
  return nRet;
}

/*
** pCArray contains pointers to and sizes of all cells in the page being
** balanced.  The current page, pPg, has pPg->nCell cells starting with
** pCArray->apCell[iOld].  After balancing, this page should hold nNew cells
** starting at apCell[iNew].
**
** This routine makes the necessary adjustments to pPg so that it contains
** the correct cells after being balanced.
**
................................................................................

#ifdef SQLITE_DEBUG
  u8 *pTmp = sqlite3PagerTempSpace(pPg->pBt->pPager);
  memcpy(pTmp, aData, pPg->pBt->usableSize);
#endif

  /* Remove cells from the start and end of the page */
  assert( nCell>=0 );
  if( iOld<iNew ){
    int nShift = pageFreeArray(pPg, iOld, iNew-iOld, pCArray);
    if( nShift>nCell ) return SQLITE_CORRUPT_BKPT;
    memmove(pPg->aCellIdx, &pPg->aCellIdx[nShift*2], nCell*2);
    nCell -= nShift;
  }
  if( iNewEnd < iOldEnd ){
    int nTail = pageFreeArray(pPg, iNewEnd, iOldEnd - iNewEnd, pCArray);
    assert( nCell>=nTail );
    nCell -= nTail;
  }

  pData = &aData[get2byteNotZero(&aData[hdr+5])];
  if( pData<pBegin ) goto editpage_fail;

  /* Add cells to the start of the page */
  if( iNew<iOld ){
    int nAdd = MIN(nNew,iOld-iNew);
    assert( (iOld-iNew)<nNew || nCell==0 || CORRUPT_DB );
    assert( nAdd>=0 );
    pCellptr = pPg->aCellIdx;
    memmove(&pCellptr[nAdd*2], pCellptr, nCell*2);
    if( pageInsertArray(
          pPg, pBegin, &pData, pCellptr,
          iNew, nAdd, pCArray
    ) ) goto editpage_fail;
    nCell += nAdd;
................................................................................
  }

  /* Add any overflow cells */
  for(i=0; i<pPg->nOverflow; i++){
    int iCell = (iOld + pPg->aiOvfl[i]) - iNew;
    if( iCell>=0 && iCell<nNew ){
      pCellptr = &pPg->aCellIdx[iCell * 2];
      assert( nCell>=iCell );
      memmove(&pCellptr[2], pCellptr, (nCell - iCell) * 2);
      nCell++;
      if( pageInsertArray(
            pPg, pBegin, &pData, pCellptr,
            iCell+iNew, 1, pCArray
      ) ) goto editpage_fail;
    }
  }

  /* Append cells to the end of the page */
  assert( nCell>=0 );
  pCellptr = &pPg->aCellIdx[nCell*2];
  if( pageInsertArray(
        pPg, pBegin, &pData, pCellptr,
        iNew+nCell, nNew-nCell, pCArray
  ) ) goto editpage_fail;

  pPg->nCell = nNew;
................................................................................
  **    szNew[i]: Spaced used on the i-th sibling page.
  **   cntNew[i]: Index in b.apCell[] and b.szCell[] for the first cell to
  **              the right of the i-th sibling page.
  ** usableSpace: Number of bytes of space available on each sibling.
  ** 
  */
  usableSpace = pBt->usableSize - 12 + leafCorrection;
  for(i=k=0; i<nOld; i++, k++){
    MemPage *p = apOld[i];
    b.apEnd[k] = p->aDataEnd;
    b.ixNx[k] = cntOld[i];
    if( !leafData ){
      k++;
      b.apEnd[k] = pParent->aDataEnd;

      b.ixNx[k] = cntOld[i]+1;
    }
    szNew[i] = usableSpace - p->nFree;
    for(j=0; j<p->nOverflow; j++){
      szNew[i] += 2 + p->xCellSize(p, p->apOvfl[j]);
    }
    cntNew[i] = cntOld[i];
  }
  k = nOld;
................................................................................
  ** the cursor to the largest entry in the tree that is smaller than
  ** the entry being deleted. This cell will replace the cell being deleted
  ** from the internal node. The 'previous' entry is used for this instead
  ** of the 'next' entry, as the previous entry is always a part of the
  ** sub-tree headed by the child page of the cell being deleted. This makes
  ** balancing the tree following the delete operation easier.  */
  if( !pPage->leaf ){

    rc = sqlite3BtreePrevious(pCur, 0);
    assert( rc!=SQLITE_DONE );
    if( rc ) return rc;
  }

  /* Save the positions of any other cursors open on this table before
  ** making any modifications.  */
................................................................................
  BtCursor *pCur,   /* Cursor pointing at record to retrieve. */
  u32 offset,       /* Offset from the start of data to return bytes from. */
  u32 amt,          /* Number of bytes to return. */
  Mem *pMem         /* OUT: Return data in this Mem structure. */
){
  int rc;
  pMem->flags = MEM_Null;
  if( sqlite3BtreeMaxRecordSize(pCur)<offset+amt ){
    return SQLITE_CORRUPT_BKPT;
  }
  if( SQLITE_OK==(rc = sqlite3VdbeMemClearAndResize(pMem, amt+1)) ){
    rc = sqlite3BtreePayload(pCur, offset, amt, pMem->z);
    if( rc==SQLITE_OK ){
      pMem->z[amt] = 0;   /* Overrun area used when reading malformed records */
      pMem->flags = MEM_Blob;
      pMem->n = (int)amt;
    }else{
................................................................................
  return p==pWalker->u.pSelect ? WRC_Continue : WRC_Prune;
}
static void gatherSelectWindows(Select *p){
  Walker w;
  w.xExprCallback = gatherSelectWindowsCallback;
  w.xSelectCallback = gatherSelectWindowsSelectCallback;
  w.xSelectCallback2 = 0;
  w.pParse = 0;
  w.u.pSelect = p;
  sqlite3WalkSelect(&w, p);
}
#endif


/*
................................................................................
  testcase( pExpr->op==TK_AGG_COLUMN );
  testcase( pExpr->op==TK_AGG_FUNCTION );
  if( ExprHasProperty(pExpr, EP_FromJoin) ) return WRC_Prune;
  switch( pExpr->op ){
    case TK_ISNOT:
    case TK_NOT:
    case TK_ISNULL:
    case TK_NOTNULL:
    case TK_IS:
    case TK_OR:
    case TK_CASE:
    case TK_IN:
    case TK_FUNCTION:
      testcase( pExpr->op==TK_ISNOT );
      testcase( pExpr->op==TK_NOT );
      testcase( pExpr->op==TK_ISNULL );
      testcase( pExpr->op==TK_NOTNULL );
      testcase( pExpr->op==TK_IS );
      testcase( pExpr->op==TK_OR );
      testcase( pExpr->op==TK_CASE );
      testcase( pExpr->op==TK_IN );
      testcase( pExpr->op==TK_FUNCTION );
      return WRC_Prune;
    case TK_COLUMN:
................................................................................
      sqlite3_result_error(context, zErr, -1);
      sqlite3_free(zErr);
      return;
    }
    assert( pVfs );
    flags |= SQLITE_OPEN_MAIN_DB;
    rc = sqlite3BtreeOpen(pVfs, zPath, db, &pNew->pBt, 0, flags);

    db->nDb++;
    pNew->zDbSName = sqlite3DbStrDup(db, zName);
  }
  db->noSharedCache = 0;
  if( rc==SQLITE_CONSTRAINT ){
    rc = SQLITE_ERROR;
    zErrDyn = sqlite3MPrintf(db, "database is already attached");
  }else if( rc==SQLITE_OK ){
    Pager *pPager;
................................................................................
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
    sqlite3BtreeSetPagerFlags(pNew->pBt,
                      PAGER_SYNCHRONOUS_FULL | (db->flags & PAGER_FLAGS_MASK));
#endif
    sqlite3BtreeLeave(pNew->pBt);
  }
  pNew->safety_level = SQLITE_DEFAULT_SYNCHRONOUS+1;

  if( rc==SQLITE_OK && pNew->zDbSName==0 ){
    rc = SQLITE_NOMEM_BKPT;
  }


#ifdef SQLITE_HAS_CODEC
  if( rc==SQLITE_OK ){
................................................................................
      case SQLITE_BLOB:
        nKey = sqlite3_value_bytes(argv[2]);
        zKey = (char *)sqlite3_value_blob(argv[2]);
        rc = sqlite3CodecAttach(db, db->nDb-1, zKey, nKey);
        break;

      case SQLITE_NULL:
        /* No key specified.  Use the key from URI filename, or if none,
        ** use the key from the main database. */
        if( sqlite3CodecQueryParameters(db, zName, zPath)==0 ){
          sqlite3CodecGetKey(db, 0, (void**)&zKey, &nKey);
          if( nKey || sqlite3BtreeGetOptimalReserve(db->aDb[0].pBt)>0 ){
            rc = sqlite3CodecAttach(db, db->nDb-1, zKey, nKey);
          }
        }
        break;
    }
  }
#endif
  sqlite3_free( zPath );

  /* If the file was opened successfully, read the schema for the new database.
  ** If this fails, or if opening the file failed, then close the file and 
  ** remove the entry from the db->aDb[] array. i.e. put everything back the
  ** way we found it.
  */
  if( rc==SQLITE_OK ){
................................................................................
    ** in-memory database structures. 
    */
    assert( pParse->nErr==0 );
    if( db->init.busy ){
      Index *p;
      assert( !IN_SPECIAL_PARSE );
      assert( sqlite3SchemaMutexHeld(db, 0, pIndex->pSchema) );
      if( pTblName!=0 ){
        pIndex->tnum = db->init.newTnum;
        if( sqlite3IndexHasDuplicateRootPage(pIndex) ){
          sqlite3ErrorMsg(pParse, "invalid rootpage");
          pParse->rc = SQLITE_CORRUPT_BKPT;
          goto exit_create_index;
        }
      }
      p = sqlite3HashInsert(&pIndex->pSchema->idxHash, 
          pIndex->zName, pIndex);
      if( p ){
        assert( p==pIndex );  /* Malloc must have failed */
        sqlite3OomFault(db);
        goto exit_create_index;
      }
      db->mDbFlags |= DBFLAG_SchemaChange;



    }

    /* If this is the initial CREATE INDEX statement (or CREATE TABLE if the
    ** index is an implied index for a UNIQUE or PRIMARY KEY constraint) then
    ** emit code to allocate the index rootpage on disk and make an entry for
    ** the index in the sqlite_master table and populate the index with
    ** content.  But, do not do this if we are simply reading the sqlite_master
................................................................................
  assert( pSrc!=0 );
  assert( iStart<=pSrc->nSrc );

  /* Allocate additional space if needed */
  if( (u32)pSrc->nSrc+nExtra>pSrc->nAlloc ){
    SrcList *pNew;
    int nAlloc = pSrc->nSrc*2+nExtra;

    sqlite3 *db = pParse->db;

    if( pSrc->nSrc+nExtra>=SQLITE_MAX_SRCLIST ){
      sqlite3ErrorMsg(pParse, "too many FROM clause terms, max: %d",
                      SQLITE_MAX_SRCLIST);
      return 0;
    }
................................................................................
    pNew = sqlite3DbRealloc(db, pSrc,
               sizeof(*pSrc) + (nAlloc-1)*sizeof(pSrc->a[0]) );
    if( pNew==0 ){
      assert( db->mallocFailed );
      return 0;
    }
    pSrc = pNew;

    pSrc->nAlloc = nAlloc;
  }

  /* Move existing slots that come after the newly inserted slots
  ** out of the way */
  for(i=pSrc->nSrc-1; i>=iStart; i--){
    pSrc->a[i+nExtra] = pSrc->a[i];
  }
................................................................................

  if( !sqlite3SafetyCheckOk(db) ) return SQLITE_MISUSE_BKPT;
  if( zSql==0 ) zSql = "";

  sqlite3_mutex_enter(db->mutex);
  sqlite3Error(db, SQLITE_OK);
  while( rc==SQLITE_OK && zSql[0] ){
    int nCol = 0;
    char **azVals = 0;

    pStmt = 0;
    rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, &zLeftover);
    assert( rc==SQLITE_OK || pStmt==0 );
    if( rc!=SQLITE_OK ){
      continue;
    }
    if( !pStmt ){
      /* this happens for a comment or white-space */
      zSql = zLeftover;
      continue;
    }

    callbackIsInit = 0;


    while( 1 ){
      int i;
      rc = sqlite3_step(pStmt);

      /* Invoke the callback function if required */
      if( xCallback && (SQLITE_ROW==rc || 
          (SQLITE_DONE==rc && !callbackIsInit
                           && db->flags&SQLITE_NullCallback)) ){
        if( !callbackIsInit ){
          nCol = sqlite3_column_count(pStmt);
          azCols = sqlite3DbMallocRaw(db, (2*nCol+1)*sizeof(const char*));
          if( azCols==0 ){
            goto exec_out;
          }
          for(i=0; i<nCol; i++){
            azCols[i] = (char *)sqlite3_column_name(pStmt, i);
            /* sqlite3VdbeSetColName() installs column names as UTF8
................................................................................
#define PragTyp_THREADS                       37
#define PragTyp_WAL_AUTOCHECKPOINT            38
#define PragTyp_WAL_CHECKPOINT                39
#define PragTyp_ACTIVATE_EXTENSIONS           40
#define PragTyp_HEXKEY                        41
#define PragTyp_KEY                           42
#define PragTyp_LOCK_STATUS                   43

#define PragTyp_STATS                         44

/* Property flags associated with various pragma. */
#define PragFlg_NeedSchema 0x01 /* Force schema load before running */
#define PragFlg_NoColumns  0x02 /* OP_ResultRow called with zero columns */
#define PragFlg_NoColumns1 0x04 /* zero columns if RHS argument is present */
#define PragFlg_ReadOnly   0x08 /* Read-only HEADER_VALUE */
#define PragFlg_Result0    0x10 /* Acts as query when no argument */
................................................................................
 {/* zName:     */ "compile_options",
  /* ePragTyp:  */ PragTyp_COMPILE_OPTIONS,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)

 {/* zName:     */ "count_changes",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_CountRows },
#endif

#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_OS_WIN

 {/* zName:     */ "data_store_directory",
  /* ePragTyp:  */ PragTyp_DATA_STORE_DIRECTORY,
  /* ePragFlg:  */ PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },

#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
 {/* zName:     */ "data_version",
  /* ePragTyp:  */ PragTyp_HEADER_VALUE,
  /* ePragFlg:  */ PragFlg_ReadOnly|PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_DATA_VERSION },
................................................................................
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "database_list",
  /* ePragTyp:  */ PragTyp_DATABASE_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 35, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)

 {/* zName:     */ "default_cache_size",
  /* ePragTyp:  */ PragTyp_DEFAULT_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 45, 1,
  /* iArg:      */ 0 },

#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "defer_foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_DeferFKs },
#endif
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)

 {/* zName:     */ "empty_result_callbacks",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_NullCallback },

#endif
#if !defined(SQLITE_OMIT_UTF16)
 {/* zName:     */ "encoding",
  /* ePragTyp:  */ PragTyp_ENCODING,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
 {/* zName:     */ "freelist_count",
  /* ePragTyp:  */ PragTyp_HEADER_VALUE,
  /* ePragFlg:  */ PragFlg_ReadOnly|PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_FREE_PAGE_COUNT },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)

 {/* zName:     */ "full_column_names",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_FullColNames },



 {/* zName:     */ "fullfsync",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_FullFSync },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
................................................................................
  /* iArg:      */ 0 },
 {/* zName:     */ "page_size",
  /* ePragTyp:  */ PragTyp_PAGE_SIZE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if defined(SQLITE_DEBUG)
 {/* zName:     */ "parser_trace",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_ParserTrace },
#endif
#endif
#if defined(SQLITE_INTROSPECTION_PRAGMAS)
 {/* zName:     */ "pragma_list",
  /* ePragTyp:  */ PragTyp_PRAGMA_LIST,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 9, 1,
  /* iArg:      */ 0 },
................................................................................
 {/* zName:     */ "secure_delete",
  /* ePragTyp:  */ PragTyp_SECURE_DELETE,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)

 {/* zName:     */ "short_column_names",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_ShortColNames },

#endif
 {/* zName:     */ "shrink_memory",
  /* ePragTyp:  */ PragTyp_SHRINK_MEMORY,
  /* ePragFlg:  */ PragFlg_NoColumns,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "soft_heap_limit",
................................................................................
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "temp_store",
  /* ePragTyp:  */ PragTyp_TEMP_STORE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },



 {/* zName:     */ "temp_store_directory",
  /* ePragTyp:  */ PragTyp_TEMP_STORE_DIRECTORY,
  /* ePragFlg:  */ PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },

#endif
#if defined(SQLITE_HAS_CODEC)
 {/* zName:     */ "textkey",
  /* ePragTyp:  */ PragTyp_KEY,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 4 },
................................................................................
      sqlite3VdbeJumpHere(v, addrTop);
    }
  }
  break;
#endif /* !defined(SQLITE_OMIT_TRIGGER) */
#endif /* !defined(SQLITE_OMIT_FOREIGN_KEY) */














  /* Reinstall the LIKE and GLOB functions.  The variant of LIKE
  ** used will be case sensitive or not depending on the RHS.
  */
  case PragTyp_CASE_SENSITIVE_LIKE: {
    if( zRight ){
      sqlite3RegisterLikeFunctions(db, sqlite3GetBoolean(zRight, 0));
    }
................................................................................
    if( zObj==0 ) zObj = "?";
    z = sqlite3MPrintf(db, "malformed database schema (%s)", zObj);
    if( zExtra && zExtra[0] ) z = sqlite3MPrintf(db, "%z - %s", z, zExtra);
    *pData->pzErrMsg = z;
    pData->rc = SQLITE_CORRUPT_BKPT;
  }
}

/*
** Check to see if any sibling index (another index on the same table)
** of pIndex has the same root page number, and if it does, return true.
** This would indicate a corrupt schema.
*/
SQLITE_PRIVATE int sqlite3IndexHasDuplicateRootPage(Index *pIndex){
  Index *p;
  for(p=pIndex->pTable->pIndex; p; p=p->pNext){
    if( p->tnum==pIndex->tnum && p!=pIndex ) return 1;
  }
  return 0;
}

/*
** This is the callback routine for the code that initializes the
** database.  See sqlite3Init() below for additional information.
** This routine is also called from the OP_ParseSchema opcode of the VDBE.
**
** Each callback contains the following information:
................................................................................
    ** to do here is record the root page number for that index.
    */
    Index *pIndex;
    pIndex = sqlite3FindIndex(db, argv[0], db->aDb[iDb].zDbSName);
    if( pIndex==0
     || sqlite3GetInt32(argv[1],&pIndex->tnum)==0
     || pIndex->tnum<2
     || sqlite3IndexHasDuplicateRootPage(pIndex)
    ){
      corruptSchema(pData, argv[0], pIndex?"invalid rootpage":"orphan index");
    }
  }
  return 0;
}

................................................................................
     && (pTabList->nSrc==1
         || (pTabList->a[1].fg.jointype&(JT_LEFT|JT_CROSS))!=0)
    ){
      continue;
    }

    if( flattenSubquery(pParse, p, i, isAgg) ){
      if( pParse->nErr ) goto select_end;
      /* This subquery can be absorbed into its parent. */
      i = -1;
    }
    pTabList = p->pSrc;
    if( db->mallocFailed ) goto select_end;
    if( !IgnorableOrderby(pDest) ){
      sSort.pOrderBy = p->pOrderBy;
................................................................................
  if( db->aVTrans ){
    int i;
    for(i=0; rc==SQLITE_OK && i<db->nVTrans; i++){
      VTable *pVTab = db->aVTrans[i];
      const sqlite3_module *pMod = pVTab->pMod->pModule;
      if( pVTab->pVtab && pMod->iVersion>=2 ){
        int (*xMethod)(sqlite3_vtab *, int);
        sqlite3VtabLock(pVTab);
        switch( op ){
          case SAVEPOINT_BEGIN:
            xMethod = pMod->xSavepoint;
            pVTab->iSavepoint = iSavepoint+1;
            break;
          case SAVEPOINT_ROLLBACK:
            xMethod = pMod->xRollbackTo;
................................................................................
          default:
            xMethod = pMod->xRelease;
            break;
        }
        if( xMethod && pVTab->iSavepoint>iSavepoint ){
          rc = xMethod(pVTab->pVtab, iSavepoint);
        }
        sqlite3VtabUnlock(pVTab);
      }
    }
  }
  return rc;
}

/*
................................................................................
    ** into reference to index columns.
    **
    ** Do not do this for the RHS of a LEFT JOIN. This is because the 
    ** expression may be evaluated after OP_NullRow has been executed on
    ** the cursor. In this case it is important to do the full evaluation,
    ** as the result of the expression may not be NULL, even if all table
    ** column values are.  https://www.sqlite.org/src/info/7fa8049685b50b5a
    **
    ** Also, do not do this when processing one index an a multi-index
    ** OR clause, since the transformation will become invalid once we
    ** move forward to the next index.
    ** https://sqlite.org/src/info/4e8e4857d32d401f
    */
    if( pLevel->iLeftJoin==0 && (pWInfo->wctrlFlags & WHERE_OR_SUBCLAUSE)==0 ){
      whereIndexExprTrans(pIdx, iCur, iIdxCur, pWInfo);
    }

    /* Record the instruction used to terminate the loop. */
    if( pLoop->wsFlags & WHERE_ONEROW ){
      pLevel->op = OP_Noop;
    }else if( bRev ){
................................................................................
    if( pScan->iEquiv>=pScan->nEquiv ) break;
    pWC = pScan->pOrigWC;
    k = 0;
    pScan->iEquiv++;
  }
  return 0;
}

/*
** This is whereScanInit() for the case of an index on an expression.
** It is factored out into a separate tail-recursion subroutine so that
** the normal whereScanInit() routine, which is a high-runner, does not
** need to push registers onto the stack as part of its prologue.
*/
static SQLITE_NOINLINE WhereTerm *whereScanInitIndexExpr(WhereScan *pScan){
  pScan->idxaff = sqlite3ExprAffinity(pScan->pIdxExpr);
  return whereScanNext(pScan);
}

/*
** Initialize a WHERE clause scanner object.  Return a pointer to the
** first match.  Return NULL if there are no matches.
**
** The scanner will be searching the WHERE clause pWC.  It will look
** for terms of the form "X <op> <expr>" where X is column iColumn of table
................................................................................
  Index *pIdx             /* Must be compatible with this index */
){
  pScan->pOrigWC = pWC;
  pScan->pWC = pWC;
  pScan->pIdxExpr = 0;
  pScan->idxaff = 0;
  pScan->zCollName = 0;
  pScan->opMask = opMask;
  pScan->k = 0;
  pScan->aiCur[0] = iCur;
  pScan->nEquiv = 1;
  pScan->iEquiv = 1;
  if( pIdx ){
    int j = iColumn;
    iColumn = pIdx->aiColumn[j];
    if( iColumn==XN_EXPR ){
      pScan->pIdxExpr = pIdx->aColExpr->a[j].pExpr;
      pScan->zCollName = pIdx->azColl[j];
      pScan->aiColumn[0] = XN_EXPR;
      return whereScanInitIndexExpr(pScan);
    }else if( iColumn==pIdx->pTable->iPKey ){
      iColumn = XN_ROWID;
    }else if( iColumn>=0 ){
      pScan->idxaff = pIdx->pTable->aCol[iColumn].affinity;
      pScan->zCollName = pIdx->azColl[j];
    }
  }else if( iColumn==XN_EXPR ){
    return 0;
  }



  pScan->aiColumn[0] = iColumn;


  return whereScanNext(pScan);
}

/*
** Search for a term in the WHERE clause that is of the form "X <op> <expr>"
** where X is a reference to the iColumn of table iCur or of index pIdx
** if pIdx!=0 and <op> is one of the WO_xx operator codes specified by
................................................................................
  mxSqlLen = db->aLimit[SQLITE_LIMIT_SQL_LENGTH];
  if( db->nVdbeActive==0 ){
    db->u1.isInterrupted = 0;
  }
  pParse->rc = SQLITE_OK;
  pParse->zTail = zSql;
  assert( pzErrMsg!=0 );
#ifdef SQLITE_DEBUG
  if( db->flags & SQLITE_ParserTrace ){
    printf("parser: [[[%s]]]\n", zSql);
    sqlite3ParserTrace(stdout, "parser: ");
  }else{
    sqlite3ParserTrace(0, 0);
  }
#endif
#ifdef sqlite3Parser_ENGINEALWAYSONSTACK
  pEngine = &sEngine;
  sqlite3ParserInit(pEngine, pParse);
#else
  pEngine = sqlite3ParserAlloc(sqlite3Malloc, pParse);
  if( pEngine==0 ){
    sqlite3OomFault(db);
................................................................................
  Vdbe *pVdbe,       /* VM being reprepared */
  const char *zSql   /* The original SQL string */
){
  sqlite3 *db;       /* The database connection */
  int i;             /* Next unread byte of zSql[] */
  int n;             /* length of current token */
  int tokenType;     /* type of current token */
  int prevType = 0;  /* Previous non-whitespace token */
  int nParen;        /* Number of nested levels of parentheses */
  int iStartIN;      /* Start of RHS of IN operator in z[] */
  int nParenAtIN;    /* Value of nParent at start of RHS of IN operator */
  int j;             /* Bytes of normalized SQL generated so far */
  sqlite3_str *pStr; /* The normalized SQL string under construction */

  db = sqlite3VdbeDb(pVdbe);
................................................................................
        iVal = SQLITE_DEFAULT_SORTERREF_SIZE;
      }
      sqlite3GlobalConfig.szSorterRef = (u32)iVal;
      break;
    }
#endif /* SQLITE_ENABLE_SORTER_REFERENCES */

#ifdef SQLITE_ENABLE_DESERIALIZE
    case SQLITE_CONFIG_MEMDB_MAXSIZE: {
      sqlite3GlobalConfig.mxMemdbSize = va_arg(ap, sqlite3_int64);
      break;
    }
#endif /* SQLITE_ENABLE_DESERIALIZE */

    default: {
      rc = SQLITE_ERROR;
      break;
    }
  }
  va_end(ap);
  return rc;
................................................................................
    zFile = 0;
  }
  *pFlags = flags;
  *pzFile = zFile;
  return rc;
}

#if defined(SQLITE_HAS_CODEC)
/*
** Process URI filename query parameters relevant to the SQLite Encryption
** Extension.  Return true if any of the relevant query parameters are
** seen and return false if not.
*/
SQLITE_PRIVATE int sqlite3CodecQueryParameters(
  sqlite3 *db,           /* Database connection */
  const char *zDb,       /* Which schema is being created/attached */
  const char *zUri       /* URI filename */
){
  const char *zKey;
  if( (zKey = sqlite3_uri_parameter(zUri, "hexkey"))!=0 && zKey[0] ){
    u8 iByte;
    int i;
    char zDecoded[40];
    for(i=0, iByte=0; i<sizeof(zDecoded)*2 && sqlite3Isxdigit(zKey[i]); i++){
      iByte = (iByte<<4) + sqlite3HexToInt(zKey[i]);
      if( (i&1)!=0 ) zDecoded[i/2] = iByte;
    }
    sqlite3_key_v2(db, zDb, zDecoded, i/2);
    return 1;
  }else if( (zKey = sqlite3_uri_parameter(zUri, "key"))!=0 ){
    sqlite3_key_v2(db, zDb, zKey, sqlite3Strlen30(zKey));
    return 1;
  }else if( (zKey = sqlite3_uri_parameter(zUri, "textkey"))!=0 ){
    sqlite3_key_v2(db, zDb, zKey, -1);
    return 1;
  }else{
    return 0;
  }
}
#endif


/*
** This routine does the work of opening a database on behalf of
** sqlite3_open() and sqlite3_open16(). The database filename "zFilename"  
** is UTF-8 encoded.
*/
static int openDatabase(
................................................................................
  if( sqlite3GlobalConfig.xSqllog ){
    /* Opening a db handle. Fourth parameter is passed 0. */
    void *pArg = sqlite3GlobalConfig.pSqllogArg;
    sqlite3GlobalConfig.xSqllog(pArg, db, zFilename, 0);
  }
#endif
#if defined(SQLITE_HAS_CODEC)
  if( rc==SQLITE_OK ) sqlite3CodecQueryParameters(db, 0, zOpen);














#endif
  sqlite3_free(zOpen);
  return rc & 0xff;
}


/*
** Open a new database handle.
*/
SQLITE_API int sqlite3_open(
  const char *zFilename, 
  sqlite3 **ppDb 
................................................................................
    **
    ** Similar padding is added in the fts3DoclistOrMerge() function.
    */
    pTS->aaOutput[0] = sqlite3_malloc(nDoclist + FTS3_VARINT_MAX + 1);
    pTS->anOutput[0] = nDoclist;
    if( pTS->aaOutput[0] ){
      memcpy(pTS->aaOutput[0], aDoclist, nDoclist);
      memset(&pTS->aaOutput[0][nDoclist], 0, FTS3_VARINT_MAX);
    }else{
      return SQLITE_NOMEM;
    }
  }else{
    char *aMerge = aDoclist;
    int nMerge = nDoclist;
    int iOut;
................................................................................
  if( isScan ) pCsr->filter.flags |= FTS3_SEGMENT_SCAN;

  if( iEq>=0 || iGe>=0 ){
    const unsigned char *zStr = sqlite3_value_text(apVal[0]);
    assert( (iEq==0 && iGe==-1) || (iEq==-1 && iGe==0) );
    if( zStr ){
      pCsr->filter.zTerm = sqlite3_mprintf("%s", zStr);

      if( pCsr->filter.zTerm==0 ) return SQLITE_NOMEM;
      pCsr->filter.nTerm = (int)strlen(pCsr->filter.zTerm);
    }
  }

  if( iLe>=0 ){
    pCsr->zStop = sqlite3_mprintf("%s", sqlite3_value_text(apVal[iLe]));

    if( pCsr->zStop==0 ) return SQLITE_NOMEM;
    pCsr->nStop = (int)strlen(pCsr->zStop);
  }
  
  if( iLangid>=0 ){
    iLangVal = sqlite3_value_int(apVal[iLangid]);

    /* If the user specified a negative value for the languageid, use zero
    ** instead. This works, as the "languageid=?" constraint will also
................................................................................
  pPhrase->nToken = pExpr->pPhrase->nToken;
  rc = sqlite3Fts3EvalPhrasePoslist(p->pCsr, pExpr, p->iCol, &pCsr);
  assert( rc==SQLITE_OK || pCsr==0 );
  if( pCsr ){
    int iFirst = 0;
    pPhrase->pList = pCsr;
    fts3GetDeltaPosition(&pCsr, &iFirst);
    if( iFirst<0 ){
      rc = FTS_CORRUPT_VTAB;
    }else{
      pPhrase->pHead = pCsr;
      pPhrase->pTail = pCsr;
      pPhrase->iHead = iFirst;
      pPhrase->iTail = iFirst;
    }
  }else{
    assert( rc!=SQLITE_OK || (
       pPhrase->pList==0 && pPhrase->pHead==0 && pPhrase->pTail==0 
    ));
  }

  return rc;
................................................................................
      for(ii=0; rc==SQLITE_OK && ii<nInst; ii++){
        int ip, ic, io;
        int iAdj;
        int nScore;
        int jj;

        rc = pApi->xInst(pFts, ii, &ip, &ic, &io);
        if( ic!=i ) continue;
        if( io>nDocsize ) rc = FTS5_CORRUPT;
        if( rc!=SQLITE_OK ) continue;
        memset(aSeen, 0, nPhrase);
        rc = fts5SnippetScore(pApi, pFts, nDocsize, aSeen, i,
            io, nToken, &nScore, &iAdj
        );
        if( rc==SQLITE_OK && nScore>nBestScore ){
          nBestScore = nScore;
          iBestCol = i;
................................................................................
*/
static void fts5SegIterLoadTerm(Fts5Index *p, Fts5SegIter *pIter, int nKeep){
  u8 *a = pIter->pLeaf->p;        /* Buffer to read data from */
  int iOff = pIter->iLeafOffset;  /* Offset to read at */
  int nNew;                       /* Bytes of new data */

  iOff += fts5GetVarint32(&a[iOff], nNew);
  if( iOff+nNew>pIter->pLeaf->szLeaf || nKeep>pIter->term.n || nNew==0 ){
    p->rc = FTS5_CORRUPT;
    return;
  }
  pIter->term.n = nKeep;
  fts5BufferAppendBlob(&p->rc, &pIter->term, nNew, &a[iOff]);
  assert( pIter->term.n<=pIter->term.nSpace );
  iOff += nNew;
................................................................................
        }
      }
    }while( 1 );
  }

 search_success:
  pIter->iLeafOffset = iOff + nNew;
  if( pIter->iLeafOffset>n || nNew<1 ){
    p->rc = FTS5_CORRUPT;
    return;
  }
  pIter->iTermLeafOffset = pIter->iLeafOffset;
  pIter->iTermLeafPgno = pIter->iLeafPgno;

  fts5BufferSet(&p->rc, &pIter->term, nKeep, pTerm);
................................................................................
*/
static void fts5SegiterPoslist(
  Fts5Index *p,
  Fts5SegIter *pSeg,
  Fts5Colset *pColset,
  Fts5Buffer *pBuf
){
  if( 0==fts5BufferGrow(&p->rc, pBuf, pSeg->nPos+FTS5_DATA_ZERO_PADDING) ){
    memset(&pBuf->p[pBuf->n+pSeg->nPos], 0, FTS5_DATA_ZERO_PADDING);
    if( pColset==0 ){
      fts5ChunkIterate(p, pSeg, (void*)pBuf, fts5PoslistCallback);
    }else{
      if( p->pConfig->eDetail==FTS5_DETAIL_FULL ){
        PoslistCallbackCtx sCtx;
        sCtx.pBuf = pBuf;
        sCtx.pColset = pColset;
................................................................................
      int iOff = pSeg->iTermLeafOffset;     /* Offset on new first leaf page */
      i64 iLeafRowid;
      Fts5Data *pData;
      int iId = pSeg->pSeg->iSegid;
      u8 aHdr[4] = {0x00, 0x00, 0x00, 0x00};

      iLeafRowid = FTS5_SEGMENT_ROWID(iId, pSeg->iTermLeafPgno);
      pData = fts5LeafRead(p, iLeafRowid);
      if( pData ){
        if( iOff>pData->szLeaf ){
          /* This can occur if the pages that the segments occupy overlap - if
          ** a single page has been assigned to more than one segment. In
          ** this case a prior iteration of this loop may have corrupted the
          ** segment currently being trimmed.  */
          p->rc = FTS5_CORRUPT;
................................................................................
          iRowid += iDelta;
          
          if( writer.bFirstRowidInPage ){
            fts5PutU16(&pBuf->p[0], (u16)pBuf->n);   /* first rowid on page */
            pBuf->n += sqlite3Fts5PutVarint(&pBuf->p[pBuf->n], iRowid);
            writer.bFirstRowidInPage = 0;
            fts5WriteDlidxAppend(p, &writer, iRowid);
            if( p->rc!=SQLITE_OK ) break;
          }else{
            pBuf->n += sqlite3Fts5PutVarint(&pBuf->p[pBuf->n], iDelta);
          }
          assert( pBuf->n<=pBuf->nSpace );

          if( eDetail==FTS5_DETAIL_NONE ){
            if( iOff<nDoclist && pDoclist[iOff]==0 ){
................................................................................
static void fts5AppendPoslist(
  Fts5Index *p,
  i64 iDelta,
  Fts5Iter *pMulti,
  Fts5Buffer *pBuf
){
  int nData = pMulti->base.nData;
  int nByte = nData + 9 + 9 + FTS5_DATA_ZERO_PADDING;
  assert( nData>0 );
  if( p->rc==SQLITE_OK && 0==fts5BufferGrow(&p->rc, pBuf, nByte) ){
    fts5BufferSafeAppendVarint(pBuf, iDelta);
    fts5BufferSafeAppendVarint(pBuf, nData*2);
    fts5BufferSafeAppendBlob(pBuf, pMulti->base.pData, nData);
    memset(&pBuf->p[pBuf->n], 0, FTS5_DATA_ZERO_PADDING);
  }
}


static void fts5DoclistIterNext(Fts5DoclistIter *pIter){
  u8 *p = pIter->aPoslist + pIter->nSize + pIter->nPoslist;

................................................................................
            if( iPos1<iPos2 ){
              if( iPos1!=iPrev ){
                sqlite3Fts5PoslistSafeAppend(&tmp, &iPrev, iPos1);
              }
              sqlite3Fts5PoslistNext64(a1, i1.nPoslist, &iOff1, &iPos1);
              if( iPos1<0 ) break;
            }else{
              assert_nc( iPos2!=iPrev );
              sqlite3Fts5PoslistSafeAppend(&tmp, &iPrev, iPos2);
              sqlite3Fts5PoslistNext64(a2, i2.nPoslist, &iOff2, &iPos2);
              if( iPos2<0 ) break;
            }
          }
        }

................................................................................
      goto decode_out;
    }
    fts5DecodePoslist(&rc, &s, &a[4], iOff-4);

    /* Decode any more doclist data that appears on the page before the
    ** first term. */
    nDoclist = (iTermOff ? iTermOff : szLeaf) - iOff;
    if( nDoclist+iOff>n ){
      rc = FTS5_CORRUPT;
      goto decode_out;
    }
    fts5DecodeDoclist(&rc, &s, &a[iOff], nDoclist);

    while( iPgidxOff<n && rc==SQLITE_OK ){
      int bFirst = (iPgidxOff==szLeaf);     /* True for first term on page */
      int nByte;                            /* Bytes of data */
      int iEnd;
      
................................................................................
      assert( iSavepoint>=0 );
      assert( iSavepoint<=p->ts.iSavepoint );
      p->ts.iSavepoint = iSavepoint-1;
      break;

    case FTS5_ROLLBACKTO:
      assert( p->ts.eState==1 );
      assert( iSavepoint>=-1 );
      assert( iSavepoint<=p->ts.iSavepoint );
      p->ts.iSavepoint = iSavepoint;
      break;
  }
}
#else
# define fts5CheckTransactionState(x,y,z)
................................................................................
  Fts5Context *pCtx, 
  int iCol, 
  const char **pz, 
  int *pn
){
  int rc = SQLITE_OK;
  Fts5Cursor *pCsr = (Fts5Cursor*)pCtx;
  if( fts5IsContentless((Fts5FullTable*)(pCsr->base.pVtab)) 
   || pCsr->ePlan==FTS5_PLAN_SPECIAL 
  ){
    *pz = 0;
    *pn = 0;
  }else{
    rc = fts5SeekCursor(pCsr, 0);
    if( rc==SQLITE_OK ){
      *pz = (const char*)sqlite3_column_text(pCsr->pStmt, iCol+1);
      *pn = sqlite3_column_bytes(pCsr->pStmt, iCol+1);
................................................................................
static void fts5SourceIdFunc(
  sqlite3_context *pCtx,          /* Function call context */
  int nArg,                       /* Number of args */
  sqlite3_value **apUnused        /* Function arguments */
){
  assert( nArg==0 );
  UNUSED_PARAM2(nArg, apUnused);
  sqlite3_result_text(pCtx, "fts5: 2019-02-08 13:17:39 0eca3dd3d38b31c92b49ca2d311128b74584714d9e7de895b1a6286ef959a1dd", -1, SQLITE_TRANSIENT);
}

/*
** Return true if zName is the extension on one of the shadow tables used
** by this module.
*/
static int fts5ShadowName(const char *zName){
................................................................................
    if( sqlite3Fts5IterEof(pCsr->pIter) ){
      pCsr->bEof = 1;
    }else{
      const char *zTerm;
      int nTerm;

      zTerm = sqlite3Fts5IterTerm(pCsr->pIter, &nTerm);
      assert( nTerm>=0 );
      if( pCsr->nLeTerm>=0 ){
        int nCmp = MIN(nTerm, pCsr->nLeTerm);
        int bCmp = memcmp(pCsr->zLeTerm, zTerm, nCmp);
        if( bCmp<0 || (bCmp==0 && pCsr->nLeTerm<nTerm) ){
          pCsr->bEof = 1;
          return SQLITE_OK;
        }
................................................................................
#endif
  return rc;
}
#endif /* SQLITE_CORE */
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_STMTVTAB) */

/************** End of stmt.c ************************************************/
#if __LINE__!=221843
#undef SQLITE_SOURCE_ID
#define SQLITE_SOURCE_ID      "2019-02-08 13:17:39 0eca3dd3d38b31c92b49ca2d311128b74584714d9e7de895b1a6286ef959alt2"
#endif
/* Return the source-id for this library */
SQLITE_API const char *sqlite3_sourceid(void){ return SQLITE_SOURCE_ID; }
/************************** End of sqlite3.c ******************************/

** been edited in any way since it was last checked in, then the last
** four hexadecimal digits of the hash may be modified.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.27.0"
#define SQLITE_VERSION_NUMBER 3027000
#define SQLITE_SOURCE_ID      "2019-01-27 02:45:32 9cf8ebd141aa2eb661d457624c76433bd9e4abfdef04aa52e28bc169172calt1"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
** than the configured sorter-reference size threshold - then a reference
** is stored in each sorted record and the required column values loaded
** from the database as records are returned in sorted order. The default
** value for this option is to never use this optimization. Specifying a 
** negative value for this option restores the default behaviour.
** This option is only available if SQLite is compiled with the
** [SQLITE_ENABLE_SORTER_REFERENCES] compile-time option.











** </dl>
*/
#define SQLITE_CONFIG_SINGLETHREAD  1  /* nil */
#define SQLITE_CONFIG_MULTITHREAD   2  /* nil */
#define SQLITE_CONFIG_SERIALIZED    3  /* nil */
#define SQLITE_CONFIG_MALLOC        4  /* sqlite3_mem_methods* */
#define SQLITE_CONFIG_GETMALLOC     5  /* sqlite3_mem_methods* */
................................................................................
#define SQLITE_CONFIG_MMAP_SIZE    22  /* sqlite3_int64, sqlite3_int64 */
#define SQLITE_CONFIG_WIN32_HEAPSIZE      23  /* int nByte */
#define SQLITE_CONFIG_PCACHE_HDRSZ        24  /* int *psz */
#define SQLITE_CONFIG_PMASZ               25  /* unsigned int szPma */
#define SQLITE_CONFIG_STMTJRNL_SPILL      26  /* int nByte */
#define SQLITE_CONFIG_SMALL_MALLOC        27  /* boolean */
#define SQLITE_CONFIG_SORTERREF_SIZE      28  /* int nByte */


/*
** CAPI3REF: Database Connection Configuration Options
**
** These constants are the available integer configuration options that
** can be passed as the second argument to the [sqlite3_db_config()] interface.
**
................................................................................
** zero is returned.
** 
** If F is a NULL pointer, then sqlite3_uri_parameter(F,P) returns NULL and
** sqlite3_uri_boolean(F,P,B) returns B.  If F is not a NULL pointer and
** is not a database file pathname pointer that SQLite passed into the xOpen
** VFS method, then the behavior of this routine is undefined and probably
** undesirable.


*/
SQLITE_API const char *sqlite3_uri_parameter(const char *zFilename, const char *zParam);
SQLITE_API int sqlite3_uri_boolean(const char *zFile, const char *zParam, int bDefault);
SQLITE_API sqlite3_int64 sqlite3_uri_int64(const char*, const char*, sqlite3_int64);


/*

** been edited in any way since it was last checked in, then the last
** four hexadecimal digits of the hash may be modified.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.27.1"
#define SQLITE_VERSION_NUMBER 3027001
#define SQLITE_SOURCE_ID      "2019-02-08 13:17:39 0eca3dd3d38b31c92b49ca2d311128b74584714d9e7de895b1a6286ef959a1dd"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
** than the configured sorter-reference size threshold - then a reference
** is stored in each sorted record and the required column values loaded
** from the database as records are returned in sorted order. The default
** value for this option is to never use this optimization. Specifying a 
** negative value for this option restores the default behaviour.
** This option is only available if SQLite is compiled with the
** [SQLITE_ENABLE_SORTER_REFERENCES] compile-time option.
**
** [[SQLITE_CONFIG_MEMDB_MAXSIZE]]
** <dt>SQLITE_CONFIG_MEMDB_MAXSIZE
** <dd>The SQLITE_CONFIG_MEMDB_MAXSIZE option accepts a single parameter
** [sqlite3_int64] parameter which is the default maximum size for an in-memory
** database created using [sqlite3_deserialize()].  This default maximum
** size can be adjusted up or down for individual databases using the
** [SQLITE_FCNTL_SIZE_LIMIT] [sqlite3_file_control|file-control].  If this
** configuration setting is never used, then the default maximum is determined
** by the [SQLITE_MEMDB_DEFAULT_MAXSIZE] compile-time option.  If that
** compile-time option is not set, then the default maximum is 1073741824.
** </dl>
*/
#define SQLITE_CONFIG_SINGLETHREAD  1  /* nil */
#define SQLITE_CONFIG_MULTITHREAD   2  /* nil */
#define SQLITE_CONFIG_SERIALIZED    3  /* nil */
#define SQLITE_CONFIG_MALLOC        4  /* sqlite3_mem_methods* */
#define SQLITE_CONFIG_GETMALLOC     5  /* sqlite3_mem_methods* */
................................................................................
#define SQLITE_CONFIG_MMAP_SIZE    22  /* sqlite3_int64, sqlite3_int64 */
#define SQLITE_CONFIG_WIN32_HEAPSIZE      23  /* int nByte */
#define SQLITE_CONFIG_PCACHE_HDRSZ        24  /* int *psz */
#define SQLITE_CONFIG_PMASZ               25  /* unsigned int szPma */
#define SQLITE_CONFIG_STMTJRNL_SPILL      26  /* int nByte */
#define SQLITE_CONFIG_SMALL_MALLOC        27  /* boolean */
#define SQLITE_CONFIG_SORTERREF_SIZE      28  /* int nByte */
#define SQLITE_CONFIG_MEMDB_MAXSIZE       29  /* sqlite3_int64 */

/*
** CAPI3REF: Database Connection Configuration Options
**
** These constants are the available integer configuration options that
** can be passed as the second argument to the [sqlite3_db_config()] interface.
**
................................................................................
** zero is returned.
** 
** If F is a NULL pointer, then sqlite3_uri_parameter(F,P) returns NULL and
** sqlite3_uri_boolean(F,P,B) returns B.  If F is not a NULL pointer and
** is not a database file pathname pointer that SQLite passed into the xOpen
** VFS method, then the behavior of this routine is undefined and probably
** undesirable.
**
** See the [URI filename] documentation for additional information.
*/
SQLITE_API const char *sqlite3_uri_parameter(const char *zFilename, const char *zParam);
SQLITE_API int sqlite3_uri_boolean(const char *zFile, const char *zParam, int bDefault);
SQLITE_API sqlite3_int64 sqlite3_uri_int64(const char*, const char*, sqlite3_int64);


/*

** header template lacks a <body> tag, then all of the following is
** prepended.
*/
static char zDfltHeader[] = 
@ <html>
@ <head>
@ <base href="$baseurl/$current_page" />
@ <meta http-equiv="Content-Security-Policy" \
@  content="default-src 'self' data: ; \
@  script-src 'self' 'nonce-$<nonce>' ;\
@  style-src 'self' 'unsafe-inline'" />
@ <meta name="viewport" content="width=device-width, initial-scale=1.0">
@ <title>$<project_name>: $<title></title>
@ <link rel="alternate" type="application/rss+xml" title="RSS Feed" \
@  href="$home/timeline.rss" />
@ <link rel="stylesheet" href="$stylesheet_url" type="text/css" \
@  media="screen" />
@ </head>
................................................................................
@ <body>
;

/*
** Initialize all the default TH1 variables
*/
static void style_init_th1_vars(const char *zTitle){












  Th_Store("nonce", style_nonce());
  Th_Store("project_name", db_get("project-name","Unnamed Fossil Project"));
  Th_Store("project_description", db_get("project-description",""));
  if( zTitle ) Th_Store("title", zTitle);
  Th_Store("baseurl", g.zBaseURL);
  Th_Store("secureurl", fossil_wants_https(1)? g.zHttpsURL: g.zBaseURL);
  Th_Store("home", g.zTop);
  Th_Store("index_page", db_get("index-page","/home"));
................................................................................
void webpage_error(const char *zFormat, ...){
  int i;
  int showAll;
  char *zErr = 0;
  int isAuth = 0;
  char zCap[100];
  static const char *const azCgiVars[] = {
    "COMSPEC", "DOCUMENT_ROOT", "GATEWAY_INTERFACE",
    "HTTP_ACCEPT", "HTTP_ACCEPT_CHARSET", "HTTP_ACCEPT_ENCODING",
    "HTTP_ACCEPT_LANGUAGE", "HTTP_AUTHENICATION",
    "HTTP_CONNECTION", "HTTP_HOST",
    "HTTP_IF_NONE_MATCH", "HTTP_IF_MODIFIED_SINCE",
    "HTTP_USER_AGENT", "HTTP_REFERER", "PATH_INFO", "PATH_TRANSLATED",
    "QUERY_STRING", "REMOTE_ADDR", "REMOTE_PORT",
    "REMOTE_USER", "REQUEST_METHOD",
    "REQUEST_URI", "SCRIPT_FILENAME", "SCRIPT_NAME", "SERVER_PROTOCOL",
    "HOME", "FOSSIL_HOME", "USERNAME", "USER", "FOSSIL_USER",
    "SQLITE_TMPDIR", "TMPDIR",
    "TEMP", "TMP", "FOSSIL_VFS",
    "FOSSIL_FORCE_TICKET_MODERATION", "FOSSIL_FORCE_WIKI_MODERATION",
    "FOSSIL_TCL_PATH", "TH1_DELETE_INTERP", "TH1_ENABLE_DOCS",
    "TH1_ENABLE_HOOKS", "TH1_ENABLE_TCL", "REMOTE_HOST"
  };

  login_check_credentials();
  if( g.perm.Admin || g.perm.Setup  || db_get_boolean("test_env_enable",0) ){
    isAuth = 1;
  }
  for(i=0; i<count(azCgiVars); i++) (void)P(azCgiVars[i]);

** header template lacks a <body> tag, then all of the following is
** prepended.
*/
static char zDfltHeader[] = 
@ <html>
@ <head>
@ <base href="$baseurl/$current_page" />
@ <meta http-equiv="Content-Security-Policy" content="$default_csp" />



@ <meta name="viewport" content="width=device-width, initial-scale=1.0">
@ <title>$<project_name>: $<title></title>
@ <link rel="alternate" type="application/rss+xml" title="RSS Feed" \
@  href="$home/timeline.rss" />
@ <link rel="stylesheet" href="$stylesheet_url" type="text/css" \
@  media="screen" />
@ </head>
................................................................................
@ <body>
;

/*
** Initialize all the default TH1 variables
*/
static void style_init_th1_vars(const char *zTitle){
  const char *zNonce = style_nonce();
  /*
  ** Do not overwrite the TH1 variable "default_csp" if it exists, as this
  ** allows it to be properly overridden via the TH1 setup script (i.e. it
  ** is evaluated before the header is rendered).
  */
  char *zDfltCsp = sqlite3_mprintf("default-src 'self' data: ; "
                                   "script-src 'self' 'nonce-%s' ; "
                                   "style-src 'self' 'unsafe-inline'",
                                   zNonce);
  Th_MaybeStore("default_csp", zDfltCsp);
  sqlite3_free(zDfltCsp);
  Th_Store("nonce", zNonce);
  Th_Store("project_name", db_get("project-name","Unnamed Fossil Project"));
  Th_Store("project_description", db_get("project-description",""));
  if( zTitle ) Th_Store("title", zTitle);
  Th_Store("baseurl", g.zBaseURL);
  Th_Store("secureurl", fossil_wants_https(1)? g.zHttpsURL: g.zBaseURL);
  Th_Store("home", g.zTop);
  Th_Store("index_page", db_get("index-page","/home"));
................................................................................
void webpage_error(const char *zFormat, ...){
  int i;
  int showAll;
  char *zErr = 0;
  int isAuth = 0;
  char zCap[100];
  static const char *const azCgiVars[] = {
    "COMSPEC", "DOCUMENT_ROOT", "GATEWAY_INTERFACE", "SCGI",
    "HTTP_ACCEPT", "HTTP_ACCEPT_CHARSET", "HTTP_ACCEPT_ENCODING",
    "HTTP_ACCEPT_LANGUAGE", "HTTP_AUTHENICATION",
    "HTTP_CONNECTION", "HTTP_HOST",
    "HTTP_IF_NONE_MATCH", "HTTP_IF_MODIFIED_SINCE",
    "HTTP_USER_AGENT", "HTTP_REFERER", "PATH_INFO", "PATH_TRANSLATED",
    "QUERY_STRING", "REMOTE_ADDR", "REMOTE_PORT",
    "REMOTE_USER", "REQUEST_METHOD",
    "REQUEST_URI", "SCRIPT_FILENAME", "SCRIPT_NAME", "SERVER_PROTOCOL",
    "HOME", "FOSSIL_HOME", "USERNAME", "USER", "FOSSIL_USER",
    "SQLITE_TMPDIR", "TMPDIR",
    "TEMP", "TMP", "FOSSIL_VFS",
    "FOSSIL_FORCE_TICKET_MODERATION", "FOSSIL_FORCE_WIKI_MODERATION",
    "FOSSIL_TCL_PATH", "TH1_DELETE_INTERP", "TH1_ENABLE_DOCS",
    "TH1_ENABLE_HOOKS", "TH1_ENABLE_TCL", "REMOTE_HOST",
  };

  login_check_credentials();
  if( g.perm.Admin || g.perm.Setup  || db_get_boolean("test_env_enable",0) ){
    isAuth = 1;
  }
  for(i=0; i<count(azCgiVars); i++) (void)P(azCgiVars[i]);

    fossil_print("%s", blob_str(&ctrl));
    blob_reset(&ctrl);
  }else{
    nrid = content_put(&ctrl);
    manifest_crosslink(nrid, &ctrl, MC_PERMIT_HOOKS);
  }
  assert( blob_is_reset(&ctrl) );

  manifest_to_disk(rid);

}

/*
** COMMAND: tag
**
** Usage: %fossil tag SUBCOMMAND ...
**
................................................................................
  int i;
  Blob value;
  char *zUuid;
  int dryRun = 0;
  const char *zDateOvrd;  /* The change time on the control artifact */
  const char *zUserOvrd;  /* The user name on the control artifact */

  db_must_be_within_tree();
  if( find_option("dryrun","n",0)!=0 ) dryRun = TAG_ADD_DRYRUN;
  zDateOvrd = find_option("date-override",0,1);
  zUserOvrd = find_option("user-override",0,1);

  verify_all_options();
  if( g.argc<4 ){
    usage("[OPTIONS] CHECK-IN PARENT ...");
  }
  rid = name_to_typed_rid(g.argv[2], "ci");
  blob_init(&value, 0, 0);
  for(i=3; i<g.argc; i++){

    fossil_print("%s", blob_str(&ctrl));
    blob_reset(&ctrl);
  }else{
    nrid = content_put(&ctrl);
    manifest_crosslink(nrid, &ctrl, MC_PERMIT_HOOKS);
  }
  assert( blob_is_reset(&ctrl) );
  if( g.localOpen ){
    manifest_to_disk(rid);
  }
}

/*
** COMMAND: tag
**
** Usage: %fossil tag SUBCOMMAND ...
**
................................................................................
  int i;
  Blob value;
  char *zUuid;
  int dryRun = 0;
  const char *zDateOvrd;  /* The change time on the control artifact */
  const char *zUserOvrd;  /* The user name on the control artifact */


  if( find_option("dryrun","n",0)!=0 ) dryRun = TAG_ADD_DRYRUN;
  zDateOvrd = find_option("date-override",0,1);
  zUserOvrd = find_option("user-override",0,1);
  db_find_and_open_repository(0, 0);
  verify_all_options();
  if( g.argc<4 ){
    usage("[OPTIONS] CHECK-IN PARENT ...");
  }
  rid = name_to_typed_rid(g.argv[2], "ci");
  blob_init(&value, 0, 0);
  for(i=3; i<g.argc; i++){

      manifest_destroy(pManifest);
      return rid;
    }
  }
  Th_SetResult(interp, "file name not found in manifest", -1);
  return 0;
}





















/*
** TH1 command: puts STRING
** TH1 command: html STRING
**
** Output STRING escaped for HTML (puts) or unchanged (html).
*/
................................................................................
    {"hasfeature",    hasfeatureCmd,        0},
    {"html",          putsCmd,              (void*)&aFlags[0]},
    {"htmlize",       htmlizeCmd,           0},
    {"http",          httpCmd,              0},
    {"insertCsrf",    insertCsrfCmd,        0},
    {"linecount",     linecntCmd,           0},
    {"markdown",      markdownCmd,          0},

    {"puts",          putsCmd,              (void*)&aFlags[1]},
    {"query",         queryCmd,             0},
    {"randhex",       randhexCmd,           0},
    {"redirect",      redirectCmd,          0},
    {"regexp",        regexpCmd,            0},
    {"reinitialize",  reinitializeCmd,      0},
    {"render",        renderCmd,            0},
................................................................................
      Th_Trace("th1-setup {%h} => %h<br />\n", g.th1Setup,
               Th_ReturnCodeName(rc, 0));
    }
  }
  g.th1Flags &= ~TH_INIT_MASK;
  g.th1Flags |= (flags & TH_INIT_MASK);
}















/*
** Store a string value in a variable in the interpreter.
*/
void Th_Store(const char *zName, const char *zValue){
  Th_FossilInit(TH_INIT_DEFAULT);
  if( zValue ){

      manifest_destroy(pManifest);
      return rid;
    }
  }
  Th_SetResult(interp, "file name not found in manifest", -1);
  return 0;
}

/*
** TH1 command: nonce
**
** Returns the value of the cryptographic nonce for the request being
** processed.
*/
static int nonceCmd(
  Th_Interp *interp,
  void *pConvert,
  int argc,
  const char **argv,
  int *argl
){
  if( argc!=1 ){
    return Th_WrongNumArgs(interp, "nonce");
  }
  Th_SetResult(interp, style_nonce(), -1);
  return TH_OK;
}

/*
** TH1 command: puts STRING
** TH1 command: html STRING
**
** Output STRING escaped for HTML (puts) or unchanged (html).
*/
................................................................................
    {"hasfeature",    hasfeatureCmd,        0},
    {"html",          putsCmd,              (void*)&aFlags[0]},
    {"htmlize",       htmlizeCmd,           0},
    {"http",          httpCmd,              0},
    {"insertCsrf",    insertCsrfCmd,        0},
    {"linecount",     linecntCmd,           0},
    {"markdown",      markdownCmd,          0},
    {"nonce",         nonceCmd,             0},
    {"puts",          putsCmd,              (void*)&aFlags[1]},
    {"query",         queryCmd,             0},
    {"randhex",       randhexCmd,           0},
    {"redirect",      redirectCmd,          0},
    {"regexp",        regexpCmd,            0},
    {"reinitialize",  reinitializeCmd,      0},
    {"render",        renderCmd,            0},
................................................................................
      Th_Trace("th1-setup {%h} => %h<br />\n", g.th1Setup,
               Th_ReturnCodeName(rc, 0));
    }
  }
  g.th1Flags &= ~TH_INIT_MASK;
  g.th1Flags |= (flags & TH_INIT_MASK);
}

/*
** Store a string value in a variable in the interpreter if the variable
** does not already exist.
*/
void Th_MaybeStore(const char *zName, const char *zValue){
  Th_FossilInit(TH_INIT_DEFAULT);
  if( zValue && !Th_ExistsVar(g.interp, zName, -1) ){
    if( g.thTrace ){
      Th_Trace("maybe_set %h {%h}<br />\n", zName, zValue);
    }
    Th_SetVar(g.interp, zName, -1, zValue, strlen(zValue));
  }
}

/*
** Store a string value in a variable in the interpreter.
*/
void Th_Store(const char *zName, const char *zValue){
  Th_FossilInit(TH_INIT_DEFAULT);
  if( zValue ){

#      define _WIN32_WINNT 0x0502 /* SetDllDirectory, Windows XP SP2 */
#    endif
#    include <windows.h>
#    ifndef TCL_DIRECTORY_SEP
#      define TCL_DIRECTORY_SEP '\\'
#    endif
#    ifndef TCL_LIBRARY_NAME
#      define TCL_LIBRARY_NAME "tcl86.dll\0"
#    endif
#    ifndef TCL_MINOR_OFFSET
#      define TCL_MINOR_OFFSET (4)
#    endif
#    ifndef dlopen
#      define dlopen(a,b) (void *)LoadLibrary((a))
#    endif
................................................................................
#  else
#    include <dlfcn.h>
#    ifndef TCL_DIRECTORY_SEP
#      define TCL_DIRECTORY_SEP '/'
#    endif
#    if defined(__CYGWIN__)
#      ifndef TCL_LIBRARY_NAME
#        define TCL_LIBRARY_NAME "libtcl8.6.dll\0"
#      endif
#      ifndef TCL_MINOR_OFFSET
#        define TCL_MINOR_OFFSET (8)
#      endif
#    elif defined(__APPLE__)
#      ifndef TCL_LIBRARY_NAME
#        define TCL_LIBRARY_NAME "libtcl8.6.dylib\0"
#      endif
#      ifndef TCL_MINOR_OFFSET
#        define TCL_MINOR_OFFSET (8)
#      endif
#    elif defined(__FreeBSD__)
#      ifndef TCL_LIBRARY_NAME
#        define TCL_LIBRARY_NAME "libtcl86.so\0"
#      endif
#      ifndef TCL_MINOR_OFFSET
#        define TCL_MINOR_OFFSET (7)
#      endif
#    else
#      ifndef TCL_LIBRARY_NAME
#        define TCL_LIBRARY_NAME "libtcl8.6.so\0"
#      endif
#      ifndef TCL_MINOR_OFFSET
#        define TCL_MINOR_OFFSET (8)
#      endif
#    endif /* defined(__CYGWIN__) */
#  endif /* defined(_WIN32) */
#  ifndef TCL_FINDEXECUTABLE_NAME
................................................................................
  Tcl_IncrRefCount(objPtr);
  resultObjPtr = Tcl_SetVar2Ex(pInterp, "argv0", NULL, objPtr,
      TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG);
  Tcl_DecrRefCount(objPtr); objPtr = 0;
  if( !resultObjPtr ){
    return TCL_ERROR;
  }
  objPtr = Tcl_NewIntObj(argc - 1);
  Tcl_IncrRefCount(objPtr);
  resultObjPtr = Tcl_SetVar2Ex(pInterp, "argc", NULL, objPtr,
      TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG);
  Tcl_DecrRefCount(objPtr); objPtr = 0;
  if( !resultObjPtr ){
    return TCL_ERROR;
  }
................................................................................
  tclContext->useTip285 = canUseTip285();
  /* Add the TH1 integration commands to Tcl. */
  Tcl_CallWhenDeleted(tclInterp, Th1DeleteProc, interp);
  Tcl_CreateObjCommand(tclInterp, "th1Eval", Th1EvalObjCmd, interp, NULL);
  Tcl_CreateObjCommand(tclInterp, "th1Expr", Th1ExprObjCmd, interp, NULL);
  /* If necessary, evaluate the custom Tcl setup script. */
  setup = tclContext->setup;
  if( setup && Tcl_Eval(tclInterp, setup)!=TCL_OK ){
    Th_ErrorMessage(interp,
        "Tcl setup script error:", Tcl_GetStringResult(tclInterp), -1);
    Tcl_DeleteInterp(tclInterp);
    tclContext->interp = tclInterp = 0;
    return TH_ERROR;
  }
  return TH_OK;

#      define _WIN32_WINNT 0x0502 /* SetDllDirectory, Windows XP SP2 */
#    endif
#    include <windows.h>
#    ifndef TCL_DIRECTORY_SEP
#      define TCL_DIRECTORY_SEP '\\'
#    endif
#    ifndef TCL_LIBRARY_NAME
#      define TCL_LIBRARY_NAME "tcl87.dll\0"
#    endif
#    ifndef TCL_MINOR_OFFSET
#      define TCL_MINOR_OFFSET (4)
#    endif
#    ifndef dlopen
#      define dlopen(a,b) (void *)LoadLibrary((a))
#    endif
................................................................................
#  else
#    include <dlfcn.h>
#    ifndef TCL_DIRECTORY_SEP
#      define TCL_DIRECTORY_SEP '/'
#    endif
#    if defined(__CYGWIN__)
#      ifndef TCL_LIBRARY_NAME
#        define TCL_LIBRARY_NAME "libtcl8.7.dll\0"
#      endif
#      ifndef TCL_MINOR_OFFSET
#        define TCL_MINOR_OFFSET (8)
#      endif
#    elif defined(__APPLE__)
#      ifndef TCL_LIBRARY_NAME
#        define TCL_LIBRARY_NAME "libtcl8.7.dylib\0"
#      endif
#      ifndef TCL_MINOR_OFFSET
#        define TCL_MINOR_OFFSET (8)
#      endif
#    elif defined(__FreeBSD__)
#      ifndef TCL_LIBRARY_NAME
#        define TCL_LIBRARY_NAME "libtcl87.so\0"
#      endif
#      ifndef TCL_MINOR_OFFSET
#        define TCL_MINOR_OFFSET (7)
#      endif
#    else
#      ifndef TCL_LIBRARY_NAME
#        define TCL_LIBRARY_NAME "libtcl8.7.so\0"
#      endif
#      ifndef TCL_MINOR_OFFSET
#        define TCL_MINOR_OFFSET (8)
#      endif
#    endif /* defined(__CYGWIN__) */
#  endif /* defined(_WIN32) */
#  ifndef TCL_FINDEXECUTABLE_NAME
................................................................................
  Tcl_IncrRefCount(objPtr);
  resultObjPtr = Tcl_SetVar2Ex(pInterp, "argv0", NULL, objPtr,
      TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG);
  Tcl_DecrRefCount(objPtr); objPtr = 0;
  if( !resultObjPtr ){
    return TCL_ERROR;
  }
  objPtr = Tcl_NewWideIntObj(argc - 1);
  Tcl_IncrRefCount(objPtr);
  resultObjPtr = Tcl_SetVar2Ex(pInterp, "argc", NULL, objPtr,
      TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG);
  Tcl_DecrRefCount(objPtr); objPtr = 0;
  if( !resultObjPtr ){
    return TCL_ERROR;
  }
................................................................................
  tclContext->useTip285 = canUseTip285();
  /* Add the TH1 integration commands to Tcl. */
  Tcl_CallWhenDeleted(tclInterp, Th1DeleteProc, interp);
  Tcl_CreateObjCommand(tclInterp, "th1Eval", Th1EvalObjCmd, interp, NULL);
  Tcl_CreateObjCommand(tclInterp, "th1Expr", Th1ExprObjCmd, interp, NULL);
  /* If necessary, evaluate the custom Tcl setup script. */
  setup = tclContext->setup;
  if( setup && Tcl_EvalEx(tclInterp, setup, -1, 0)!=TCL_OK ){
    Th_ErrorMessage(interp,
        "Tcl setup script error:", Tcl_GetStringResult(tclInterp), -1);
    Tcl_DeleteInterp(tclInterp);
    tclContext->interp = tclInterp = 0;
    return TH_ERROR;
  }
  return TH_OK;

    blob_reset(&html);
    @ <br />
    @ <input type="submit" name="edit-markup" value="Markup Editor"
    @  onclick='return confirm("Switching to markup-mode\nwill erase your WYSIWYG\nedits. Continue?")' />
  }
  login_insert_csrf_secret();
  if( havePreview ){
    if( zBody[0] ){
      @ <input type="submit" name="submit" value="Apply These Changes" />
    }else{
      @ <input type="submit" name="submit" value="Delete This Wiki Page" />
    }
  }
  @ <input type="hidden" name="name" value="%h(zPageName)" />
  @ <input type="submit" name="cancel" value="Cancel"

    blob_reset(&html);
    @ <br />
    @ <input type="submit" name="edit-markup" value="Markup Editor"
    @  onclick='return confirm("Switching to markup-mode\nwill erase your WYSIWYG\nedits. Continue?")' />
  }
  login_insert_csrf_secret();
  if( havePreview ){
    if( isWysiwyg || zBody[0] ){
      @ <input type="submit" name="submit" value="Apply These Changes" />
    }else{
      @ <input type="submit" name="submit" value="Delete This Wiki Page" />
    }
  }
  @ <input type="hidden" name="name" value="%h(zPageName)" />
  @ <input type="submit" name="cancel" value="Cancel"

fossil test-th-eval "info commands"
set sorted_result [lsort $RESULT]
protOut "Sorted: $sorted_result"
set base_commands {anoncap anycap array artifact break breakpoint catch\
      cgiHeaderLine checkout combobox continue date decorate dir enable_output \
      encode64 error expr for getParameter glob_match globalState hascap \
      hasfeature html htmlize http httpize if info insertCsrf lindex linecount \
      list llength lsearch markdown proc puts query randhex redirect regexp\
      reinitialize rename render repository return searchable set\
      setParameter setting stime string styleFooter styleHeader styleScript\
      tclReady trace unset unversioned uplevel upvar utime verifyCsrf wiki}
set tcl_commands {tclEval tclExpr tclInvoke tclIsSafe tclMakeSafe}
if {$th1Tcl} {
  test th1-info-commands-1 {$sorted_result eq [lsort "$base_commands $tcl_commands"]}
} else {
  test th1-info-commands-1 {$sorted_result eq [lsort "$base_commands"]}
}


###############################################################################

fossil test-th-eval "info vars"

if {$th1Hooks} {
  test th1-info-vars-1 {[lsort $RESULT] eq \

fossil test-th-eval "info commands"
set sorted_result [lsort $RESULT]
protOut "Sorted: $sorted_result"
set base_commands {anoncap anycap array artifact break breakpoint catch\
      cgiHeaderLine checkout combobox continue date decorate dir enable_output \
      encode64 error expr for getParameter glob_match globalState hascap \
      hasfeature html htmlize http httpize if info insertCsrf lindex linecount \
      list llength lsearch markdown nonce proc puts query randhex redirect\
      regexp reinitialize rename render repository return searchable set\
      setParameter setting stime string styleFooter styleHeader styleScript\
      tclReady trace unset unversioned uplevel upvar utime verifyCsrf wiki}
set tcl_commands {tclEval tclExpr tclInvoke tclIsSafe tclMakeSafe}
if {$th1Tcl} {
  test th1-info-commands-1 {$sorted_result eq [lsort "$base_commands $tcl_commands"]}
} else {
  test th1-info-commands-1 {$sorted_result eq [lsort "$base_commands"]}
}


###############################################################################

fossil test-th-eval "info vars"

if {$th1Hooks} {
  test th1-info-vars-1 {[lsort $RESULT] eq \

<title>Change Log</title>






<a name='v2_8'></a>
<h2>Changes for Version 2.8 (pending)</h2>

  *  Show cherry-pick merges as dotted lines on the timeline graph.
     &rarr; The "fossil rebuild" command must be run to create and
     populate the new "cherrypick" table in the repository in order 
     for this feature to operate.
  *  Add the ability to associate branches, check-ins, and tags with
     specially-named Wiki pages. This gives the ability to better
................................................................................
     list page is now broken out into a separate source file (repolist.c).
  *  Allow users with Forum Supervisor permission ('6') to add Forum
     Write Trusted permission ('4') to users as they are approving a
     forum post by that user.
  *  When running a bisect, report the number of check-ins still in
     the search range and the estimated number of bisect steps remaining.
     Do this at each step of the bisect.


  *  Make the chronological forum display feature available to all users,
     and make it the default format on mobile devices.
  *  Break out Wiki setup into a separate /setup_wiki page, accessible
     on the standard menus through Admin/Wiki.
  *  Add "Next" and "Previous" buttons on the /wdiff page, allowing
     the user to step through the versions of a wiki page.
  *  Improve the display of the /whistory page.
................................................................................
  *  "Compress" the built-in javascript by omitting comments and
     leading and trailing whitespace.
  *  Detect when the repository used by a checkout is swapped out for
     a clone that uses different RID values, and make appropriate adjustments
     to the checkout database to avoid any problems.
  *  Add the backoffice-disable setting to completely disable the
     backoffice feature.
  *  Update the built-in SQLite to version 3.27.0 alpha.
  *  Various other small enhancements to webpages and documentation.


<a name='v2_7'></a>
<h2>Changes for Version 2.7 (2018-09-22)</h2>

  *  Add the [./alerts.md|email alerts] feature for commits, ticket

<title>Change Log</title>

<a name='v2_9'></a>
<h2>Changes for Version 2.9 (pending)</h2>

  *  Improved handling of relative hyperlinks on the /artifact page

<a name='v2_8'></a>
<h2>Changes for Version 2.8 (2019-02-20)</h2>

  *  Show cherry-pick merges as dotted lines on the timeline graph.
     &rarr; The "fossil rebuild" command must be run to create and
     populate the new "cherrypick" table in the repository in order 
     for this feature to operate.
  *  Add the ability to associate branches, check-ins, and tags with
     specially-named Wiki pages. This gives the ability to better
................................................................................
     list page is now broken out into a separate source file (repolist.c).
  *  Allow users with Forum Supervisor permission ('6') to add Forum
     Write Trusted permission ('4') to users as they are approving a
     forum post by that user.
  *  When running a bisect, report the number of check-ins still in
     the search range and the estimated number of bisect steps remaining.
     Do this at each step of the bisect.
  *  Provide a permanent link to a bisect timeline using the bid= query
     parameter.
  *  Make the chronological forum display feature available to all users,
     and make it the default format on mobile devices.
  *  Break out Wiki setup into a separate /setup_wiki page, accessible
     on the standard menus through Admin/Wiki.
  *  Add "Next" and "Previous" buttons on the /wdiff page, allowing
     the user to step through the versions of a wiki page.
  *  Improve the display of the /whistory page.
................................................................................
  *  "Compress" the built-in javascript by omitting comments and
     leading and trailing whitespace.
  *  Detect when the repository used by a checkout is swapped out for
     a clone that uses different RID values, and make appropriate adjustments
     to the checkout database to avoid any problems.
  *  Add the backoffice-disable setting to completely disable the
     backoffice feature.
  *  Update the built-in SQLite to version 3.27.1.
  *  Various other small enhancements to webpages and documentation.


<a name='v2_7'></a>
<h2>Changes for Version 2.7 (2018-09-22)</h2>

  *  Add the [./alerts.md|email alerts] feature for commits, ticket

       specified by the Admin/Configuration setup page.

   *   **current_page** - The name of the page currently being processed,
       without the leading "/" and without query parameters.
       Examples:  "timeline", "doc/trunk/README.txt", "wiki".

   *   **csrf_token** - A token used to prevent cross-site request forgery.







   *   **release_version** - The release version of Fossil.  Ex: "1.31"

   *   **manifest_version** - A prefix on the check-in hash of the
       specific version of fossil that is running.  Ex: "\[47bb6432a1\]"

   *   **manifest_date** - The date of the source-code check-in for the

       specified by the Admin/Configuration setup page.

   *   **current_page** - The name of the page currently being processed,
       without the leading "/" and without query parameters.
       Examples:  "timeline", "doc/trunk/README.txt", "wiki".

   *   **csrf_token** - A token used to prevent cross-site request forgery.

   *   **default_csp** - The content to be used within the default header
       for the "Content-Security-Policy" meta tag.

   *   **nonce** - The value of the cryptographic nonce for the request
       being processed.

   *   **release_version** - The release version of Fossil.  Ex: "1.31"

   *   **manifest_version** - A prefix on the check-in hash of the
       specific version of fossil that is running.  Ex: "\[47bb6432a1\]"

   *   **manifest_date** - The date of the source-code check-in for the

Fossil itself has built-in support for TLS on the client side only. That
is to say, you can build it against [https://www.openssl.org/|the
OpenSSL library], which will allow it to clone and sync with a remote
Fossil repository via <tt>https</tt> URIs.


<h3 id="openssl-bin">Building Against a Binary Version of OpenSSL</h3>

The <tt>configure</tt> script will attempt to find OpenSSL on your




system automatically. If it can't find the files it needs, the most
common solution is to install the OpenSSL development package on your
system via your OS's package manager. Examples:

  *  <b>RHEL & Fedora</b>: <tt>sudo yum install openssl-devel</tt>
  *  <b>Debian & Ubuntu</b>: <tt>sudo apt install libssl-dev</tt>
  *  <b>FreeBSD</b>: <tt>su -c 'pkg install openssl'</tt>
  *  <b>macOS</b>: <tt>sudo brew install openssl</tt>
  *  <b>Cygwin</b>: Install <tt>openssl-devel</tt> via Cygwin's
     <tt>setup-*.exe</tt> program
................................................................................
use [https://brew.sh|Homebrew] on macOS to install OpenSSL as above.
Fossil's build system will seek it out and use it automatically.


<h3 id="openssl-src">Building Against a Non-Platform Version of
OpenSSL</h3>

The Fossil build system can also use OpenSSL when installed in
nonstandard locations.



If you've installed OpenSSL via a method that Fossil's build system
cannot find on its own, you can clue it in by passing the
<tt>--with-openssl</tt> option to the <tt>configure</tt> script. Type
<tt>./configure --help</tt> for details.

It is possible for the Fossil build system to find a functioning version
of OpenSSL which is nevertheless unsuitable. One common case is that
your OS is sufficiently outdated that the platform version of OpenSSL
can no longer communicate with remote systems adhering to the latest
advice on secure communications. Your local OpenSSL might not support

any of the [https://en.wikipedia.org/wiki/Cipher_suite|cipher suites]
the remote Fossil repository's HTTPS proxy is willing to offer, for
example, so that even though both sides are speaking a variant of
TLS/SSL, they can't come to an agreement on the cryptography.



In such cases, you may want to link Fossil to a version of OpenSSL built
from source. The easiest way to do that is:




<pre>
    cd compat             # relative to the Fossil source tree root
    tar xf /path/to/openssl-*.tar.gz
    ln -fs openssl-x.y.z openssl

    ./config              # or, e.g. ./Configure darwin64-x86_64-cc
    make -j11
    cd ../..
    ./configure --with-openssl=tree
    make -j11
</pre>

Fossil itself has built-in support for TLS on the client side only. That
is to say, you can build it against [https://www.openssl.org/|the
OpenSSL library], which will allow it to clone and sync with a remote
Fossil repository via <tt>https</tt> URIs.


<h3 id="openssl-bin">Building Against OpenSSL Automatically</h3>

The <tt>configure</tt> script will attempt to find OpenSSL on your
system automatically. It first tries asking the <tt>pkg-config</tt>
system where the OpenSSL development files are, and if that fails, it
falls back to looking through a list of likely directories.

If it can't find the files it needs, the most common solution is to
install the OpenSSL development package on your system via your OS's
package manager. Examples:

  *  <b>RHEL & Fedora</b>: <tt>sudo yum install openssl-devel</tt>
  *  <b>Debian & Ubuntu</b>: <tt>sudo apt install libssl-dev</tt>
  *  <b>FreeBSD</b>: <tt>su -c 'pkg install openssl'</tt>
  *  <b>macOS</b>: <tt>sudo brew install openssl</tt>
  *  <b>Cygwin</b>: Install <tt>openssl-devel</tt> via Cygwin's
     <tt>setup-*.exe</tt> program
................................................................................
use [https://brew.sh|Homebrew] on macOS to install OpenSSL as above.
Fossil's build system will seek it out and use it automatically.


<h3 id="openssl-src">Building Against a Non-Platform Version of
OpenSSL</h3>

The Fossil build system has a few other methods for finding OpenSSL when
the automatic methods fail or when you'd prefer that Fossil use a
different version of OpenSSL than the one Fossil's build system picks on
its own.



A good reason to do this is when the Fossil build system finds a



functioning version of OpenSSL which is nevertheless unsuitable. One
common case is that your OS is sufficiently outdated that the platform
version of OpenSSL can no longer communicate with remote systems
adhering to the latest advice on secure communications. An old OpenSSL
might not support any of the
[https://en.wikipedia.org/wiki/Cipher_suite|cipher suites] the remote
Fossil repository's HTTPS proxy is willing to offer, for example, so
that even though both sides are speaking a variant of TLS/SSL, the peers
cannot come to an agreement on the cryptography.

If you've installed the OpenSSL development files somewhere that
Fossil's build system cannot find on its own, you can clue it in by
passing the <tt>--with-openssl</tt> option to the <tt>configure</tt>
script. Type <tt>./configure --help</tt> for details.

Another option is to download the source code to OpenSSL and build
Fossil against that private version of OpenSSL:

<pre>
    cd compat             # relative to the Fossil source tree root
    tar xf /path/to/openssl-*.tar.gz
    ln -fs openssl-x.y.z openssl
    cd openssl
    ./config              # or, e.g. ./Configure darwin64-x86_64-cc
    make -j11
    cd ../..
    ./configure --with-openssl=tree
    make -j11
</pre>

  *  html
  *  htmlize
  *  http
  *  httpize
  *  insertCsrf
  *  linecount
  *  markdown

  *  puts
  *  query
  *  randhex
  *  redirect
  *  regexp
  *  reinitialize
  *  render
................................................................................

  *  markdown STRING

Renders the input string as markdown.  The result is a two-element list.
The first element contains the body, rendered as HTML.  The second element
is the text-only title string.








<a name="puts"></a>TH1 puts Command
-----------------------------------

  *  puts STRING

Outputs the STRING unchanged.

  *  html
  *  htmlize
  *  http
  *  httpize
  *  insertCsrf
  *  linecount
  *  markdown
  *  nonce
  *  puts
  *  query
  *  randhex
  *  redirect
  *  regexp
  *  reinitialize
  *  render
................................................................................

  *  markdown STRING

Renders the input string as markdown.  The result is a two-element list.
The first element contains the body, rendered as HTML.  The second element
is the text-only title string.

<a name="nonce"></a>TH1 nonce Command
-------------------------------------

  *  nonce

Returns the value of the cryptographic nonce for the request being processed.

<a name="puts"></a>TH1 puts Command
-----------------------------------

  *  puts STRING

Outputs the STRING unchanged.