Fossil with Commonmark

      for( zTok = strtok_r(zBuf, ",\"",&zPos);
           zTok && fossil_stricmp(zTok,zETag);
           zTok =  strtok_r(0, ",\"",&zPos)){}
      fossil_free(zBuf);
      if(zTok) return 1;
    }
  }

  return 0;
}
#endif

/*
** Do a normal HTTP reply
*/

/*
** Add a query parameter.  The zName portion is fixed but a copy
** must be made of zValue.
*/
void cgi_setenv(const char *zName, const char *zValue){
  cgi_set_parameter_nocopy(zName, mprintf("%s",zValue));
}


/*
** Add a list of query parameters or cookies to the parameter set.
**
** Each parameter is of the form NAME=VALUE.  Both the NAME and the
** VALUE may be url-encoded ("+" for space, "%HH" for other special
** characters).  But this routine assumes that NAME contains no

*/
static void add_param_list(char *z, int terminator){
  while( *z ){
    char *zName;
    char *zValue;
    while( fossil_isspace(*z) ){ z++; }
    zName = z;
    zValue = 0;
    while( *z ){
      if( *z==terminator ){
        *z++ = 0; break;
      }
      if( !zValue && (*z=='=') ){
        *z = 0;

        zValue = z+1;



      }
      z++;
    }
    if( zValue ){
      dehttpize(zValue);
    }else{

      zValue = zName;
    }
    if( fossil_islower(zName[0]) ){
      cgi_set_parameter_nocopy(zName, zValue);
    }
#ifdef FOSSIL_ENABLE_JSON
    json_setenv( zName, cson_value_new_string(zValue,strlen(zValue)) );
#endif /* FOSSIL_ENABLE_JSON */

      *pnContent = i;
      i += nBoundry;
      break;
    }
  }
  *pz = &z[i];
  get_line_from_string(pz, pLen);
  return z;
}

/*
** Tokenize a line of text into as many as nArg tokens.  Make
** azArg[] point to the start of each token.
**
** Tokens consist of space or semi-colon delimited words or

          char *z = azArg[++i];
          if( zName && z && fossil_islower(zName[0]) ){
            cgi_set_parameter_nocopy(mprintf("%s:mimetype",zName), z);
          }
        }
      }
    }
  }
}


#ifdef FOSSIL_ENABLE_JSON
/*
** Internal helper for cson_data_source_FILE_n().
*/

  cgi_destination(CGI_BODY);

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

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

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

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

      g.json.isJsonMode = 1;
      cgi_parse_POST_JSON(g.httpIn, (unsigned int)len);
      /* FIXMEs:

      - See if fossil really needs g.cgiIn to be set for this purpose
      (i don't think it does). If it does then fill g.cgiIn and
      refactor to parse the JSON from there.

      - After parsing POST JSON, copy the "first layer" of keys/values
      to cgi_setenv(), honoring the upper-case distinction used
      in add_param_list(). However...

      - If we do that then we might get a disconnect in precedence of
      GET/POST arguments. i prefer for GET entries to take precedence
      over like-named POST entries, but in order for that to happen we

  }
  cgi_setenv("REQUEST_URI", zToken);
  for(i=0; zToken[i] && zToken[i]!='?'; i++){}
  if( zToken[i] ) zToken[i++] = 0;
  cgi_setenv("PATH_INFO", zToken);
  cgi_setenv("QUERY_STRING", &zToken[i]);
  if( zIpAddr==0 &&
        getpeername(fileno(g.httpIn), (struct sockaddr*)&remoteName,
                                &size)>=0
  ){
    zIpAddr = inet_ntoa(remoteName.sin_addr);
  }
  if( zIpAddr ){
    cgi_setenv("REMOTE_ADDR", zIpAddr);
    g.zIpAddr = mprintf("%s", zIpAddr);
  }

  /* Get all the optional fields that follow the first line.
  */
  while( fgets(zLine,sizeof(zLine),g.httpIn) ){
    char *zFieldName;
    char *zVal;

    cgi_trace(zLine);

    }
  }
  cgi_init();
  cgi_trace(0);
}

#if INTERFACE
/*
** Bitmap values for the flags parameter to cgi_http_server().
*/
#define HTTP_SERVER_LOCALHOST      0x0001     /* Bind to 127.0.0.1 only */

#endif /* INTERFACE */

/*

      }
    }
    /* Bury dead children */
    while( waitpid(0, 0, WNOHANG)>0 ){
      nchildren--;
    }
  }
  /* NOT REACHED */
  fossil_exit(1);
#endif
  /* NOT REACHED */
  return 0;
}

  }else if( p->tm_mon>11 ){
    p->tm_year += p->tm_mon/12;
    p->tm_mon %= 12;
  }
  isLeapYr = p->tm_year%4==0 && (p->tm_year%100!=0 || (p->tm_year+300)%400==0);
  p->tm_yday = priorDays[p->tm_mon] + p->tm_mday - 1;
  if( isLeapYr && p->tm_mon>1 ) p->tm_yday++;
  nDay = (p->tm_year-70)*365 + (p->tm_year-69)/4 -p->tm_year/100 +
         (p->tm_year+300)/400 + p->tm_yday;
  t = ((nDay*24 + p->tm_hour)*60 + p->tm_min)*60 + p->tm_sec;
  return t;
}

/*
** Check the objectTime against the If-Modified-Since request header. If the

      @ <div>
    }
    blob_init(&comment, pEvent->zComment, -1);
    wiki_convert(&comment, 0, WIKI_INLINE);
    blob_reset(&comment);
    @ </div>
    @ </blockquote><hr />
  }

  wiki_convert(&tail, 0, 0);
  style_footer();
  manifest_destroy(pEvent);
}

/*

    int nEventId = strlen(zEventId);
    if( nEventId!=40 || !validate16(zEventId, 40) ){
      fossil_redirect_home();
      return;
    }
  }
  zTag = mprintf("event-%s", zEventId);
  rid = db_int(0,
    "SELECT rid FROM tagxref"
    " WHERE tagid=(SELECT tagid FROM tag WHERE tagname=%Q)"
    " ORDER BY mtime DESC", zTag
  );
  free(zTag);

  /* Need both check-in and wiki-write or wiki-create privileges in order

      Blob tags, one;
      int i, j;
      Stmt q;
      char *zBlob;

      /* Load the tags string into a blob */
      blob_zero(&tags);
      blob_append(&tags, zTags, -1);

      /* Collapse all sequences of whitespace and "," characters into
      ** a single space character */
      zBlob = blob_str(&tags);
      for(i=j=0; zBlob[i]; i++, j++){
        if( fossil_isspace(zBlob[i]) || zBlob[i]==',' ){
          while( fossil_isspace(zBlob[i+1]) ){ i++; }

      /* Extract the tags in sorted order and make an entry in the
      ** artifact for each. */
      db_prepare(&q, "SELECT x FROM newtags ORDER BY x");
      while( db_step(&q)==SQLITE_ROW ){
        blob_appendf(&event, "T +sym-%F *\n", db_column_text(&q, 0));
      }
      db_finalize(&q);
    }
    if( g.zLogin ){
      blob_appendf(&event, "U %F\n", g.zLogin);
    }
    blob_appendf(&event, "W %d\n%s\n", strlen(zBody), zBody);
    md5sum_blob(&event, &cksum);
    blob_appendf(&event, "Z %b\n", &cksum);
    blob_reset(&cksum);

  @ <tr><td align="right" valign="top"><b>Event&nbsp;Time:</b></td>
  @ <td valign="top">
  @   <input type="text" name="t" size="25" value="%h(zETime)" />
  @ </td></tr>

  @ <tr><td align="right" valign="top"><b>Timeline&nbsp;Comment:</b></td>
  @ <td valign="top">
  @ <textarea name="c" class="eventedit" cols="80"
  @  rows="3" wrap="virtual">%h(zComment)</textarea>
  @ </td></tr>

  @ <tr><td align="right" valign="top"><b>Background&nbsp;Color:</b></td>
  @ <td valign="top">
  render_color_chooser(0, zClr, 0, "clr", "cclr");
  @ </td></tr>

  @ <tr><td align="right" valign="top"><b>Tags:</b></td>
  @ <td valign="top">
  @   <input type="text" name="g" size="40" value="%h(zTags)" />
  @ </td></tr>

  @ <tr><td align="right" valign="top"><b>Page&nbsp;Content:</b></td>
  @ <td valign="top">
  @ <textarea name="w" class="eventedit" cols="80"
  @  rows="%d(n)" wrap="virtual">%h(zBody)</textarea>
  @ </td></tr>

  @ <tr><td colspan="2">
  @ <input type="submit" name="preview" value="Preview Your Changes" />
  @ <input type="submit" name="submit" value="Apply These Changes" />
  @ <input type="submit" name="cancel" value="Cancel" />
  @ </td></tr></table>
  @ </div></form>
  style_footer();
}

    }
    if( diffFlags ){
      @ <pre style="white-space:pre;">
      append_diff(zOld, zNew, diffFlags, pRe);
      @ </pre>
    }else if( zOld && zNew && fossil_strcmp(zOld,zNew)!=0 ){
      @ &nbsp;&nbsp;
      @ %z(href("%R/fdiff?v1=%S&v2=%S&sbs=1",zOld,zNew))[diff]</a>
    }
    @ </p>
  }
}

/*
** Construct an appropriate diffFlag for text_diff() based on query

  int verboseFlag;     /* True to show diffs */
  int sideBySide;      /* True for side-by-side diffs */
  u64 diffFlags;       /* Flag parameter for text_diff() */
  const char *zName;   /* Name of the checkin to be displayed */
  const char *zUuid;   /* UUID of zName */
  const char *zParent; /* UUID of the parent checkin (if any) */
  const char *zRe;     /* regex parameter */
  const char *zSbs;
  ReCompiled *pRe = 0; /* regex */

  login_check_credentials();
  if( !g.perm.Read ){ login_needed(); return; }
  zName = P("name");
  rid = name_to_rid_www("name");
  if( rid==0 ){

     "SELECT uuid, datetime(mtime, 'localtime'), user, comment,"
     "       datetime(omtime, 'localtime'), mtime"
     "  FROM blob, event"
     " WHERE blob.rid=%d"
     "   AND event.objid=%d",
     rid, rid
  );
  zSbs = P("sbs"); /* Note that "sbs=1" is the default value */
  sideBySide = (zSbs==0) || ((*zSbs!=0) && !is_false(zSbs));
  if( db_step(&q)==SQLITE_ROW ){
    const char *zUuid = db_column_text(&q, 0);
    char *zTitle = mprintf("Check-in [%.10s]", zUuid);
    char *zEUser, *zEComment;
    const char *zUser;
    const char *zComment;
    const char *zDate;

  Manifest *pFrom, *pTo;
  ManifestFile *pFileFrom, *pFileTo;
  const char *zBranch;
  const char *zFrom;
  const char *zTo;
  const char *zRe;
  const char *zVerbose;
  const char *zSbs;
  ReCompiled *pRe = 0;

  login_check_credentials();
  if( !g.perm.Read ){ login_needed(); return; }
  login_anonymous_available();

  zRe = P("regex");
  if( zRe ) re_compile(&pRe, zRe, 0);
  zBranch = P("branch");
  if( zBranch && zBranch[0] ){
    cgi_replace_parameter("from", mprintf("root:%s", zBranch));
    cgi_replace_parameter("to", zBranch);
  }
  pTo = vdiff_parse_manifest("to", &ridTo);
  if( pTo==0 ) return;
  pFrom = vdiff_parse_manifest("from", &ridFrom);
  if( pFrom==0 ) return;
  zSbs = P("sbs"); /* Note that "sbs=1" is the default value */
  sideBySide = (zSbs==0) || ((*zSbs!=0) && !is_false(zSbs));
  zVerbose = P("v");
  if( !zVerbose ){
    zVerbose = P("verbose");
  }
  if( !zVerbose ){
    zVerbose = P("detail"); /* deprecated */
  }
  verboseFlag = (zVerbose!=0) && (*zVerbose!=0) && !is_false(zVerbose);
  if( !verboseFlag && sideBySide ) verboseFlag = 1;
  zFrom = P("from");
  zTo = P("to");
  if( !sideBySide ){
    style_submenu_element("Side-by-side Diff", "sbsdiff",
                          "%R/vdiff?from=%T&to=%T&sbs=1",
                          zFrom, zTo);
  }
  if( sideBySide || !verboseFlag ) {
    style_submenu_element("Unified Diff", "udiff",
                          "%R/vdiff?from=%T&to=%T%s&sbs=0&v",
                          zFrom, zTo);
  }
  style_submenu_element("Invert", "invert",
                        "%R/vdiff?from=%T&to=%T&sbs=%d%s", zTo, zFrom,
                        sideBySide, (verboseFlag && !sideBySide)?"&v":"");
  style_header("Check-in Differences");
  @ <h2>Difference From:</h2><blockquote>
  checkin_description(ridFrom);
  @ </blockquote><h2>To:</h2><blockquote>
  checkin_description(ridTo);
  @ </blockquote>
  if( pRe ){

void diff_page(void){
  int v1, v2;
  int isPatch;
  int sideBySide;
  Blob c1, c2, diff, *pOut;
  char *zV1;
  char *zV2;
  const char *zRe, *zSbs;
  ReCompiled *pRe = 0;
  u64 diffFlags;
  const char *zStyle = "sbsdiff";

  login_check_credentials();
  if( !g.perm.Read ){ login_needed(); return; }
  v1 = name_to_rid_www("v1");
  v2 = name_to_rid_www("v2");
  if( v1==0 || v2==0 ) fossil_redirect_home();
  zSbs = P("sbs"); /* Note that "sbs=1" is the default value */
  sideBySide = (zSbs==0) || ((*zSbs!=0) && !is_false(zSbs));
  zV1 = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", v1);
  zV2 = db_text(0, "SELECT uuid FROM blob WHERE rid=%d", v2);
  isPatch = P("patch")!=0;
  if( isPatch ){
    pOut = cgi_output_blob();
    cgi_set_content_type("text/plain");
    diffFlags = 4;