mapfile.c

/******************************************************************************
 * $id: mapfile.c 7854 2008-08-14 19:22:48Z dmorissette $
 *
 * Project:  MapServer
 * Purpose:  High level Map file parsing code.
 * Author:   Steve Lime and the MapServer team.
 *
 ******************************************************************************
 * Copyright (c) 1996-2005 Regents of the University of Minnesota.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies of this Software or works derived from this Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ****************************************************************************/

#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include <stdarg.h>
#include <assert.h>
#include <ctype.h>
#include <float.h>

#include "mapserver.h"
#include "mapfile.h"
#include "mapthread.h"
#include "maptime.h"

#ifdef USE_GDAL
#  include "cpl_conv.h"
#  include "gdal.h"
#endif



extern int msyylex(void);
extern void msyyrestart(FILE *);
extern int msyylex_destroy(void);

extern double msyynumber;
extern int msyylineno;
extern FILE *msyyin;

extern int msyysource;
extern int msyystate;
extern char *msyystring;
extern char *msyybasepath;
extern int msyyreturncomments;
extern char *msyystring_buffer;
extern int msyystring_icase;

extern int loadSymbol(symbolObj *s, char *symbolpath); /* in mapsymbol.c */
extern void writeSymbol(symbolObj *s, FILE *stream); /* in mapsymbol.c */
static int loadGrid( layerObj *pLayer );
static int loadStyle(styleObj *style);
static void writeStyle(FILE* stream, int indent, styleObj *style);
static int resolveSymbolNames(mapObj *map);
static int loadExpression(expressionObj *exp);
static void writeExpression(FILE *stream, int indent, const char *name, expressionObj *exp);


/*
** Symbol to string static arrays needed for writing map files.
** Must be kept in sync with enumerations and defines found in mapserver.h.
*/
/* static char *msUnits[9]={"INCHES", "FEET", "MILES", "METERS", "KILOMETERS", "DD", "PIXELS", "PERCENTAGES", "NAUTICALMILES"}; */
/* static char *msLayerTypes[10]={"POINT", "LINE", "POLYGON", "RASTER", "ANNOTATION", "QUERY", "CIRCLE", "TILEINDEX","CHART"}; */
char *msPositionsText[MS_POSITIONS_LENGTH] = {"UL", "LR", "UR", "LL", "CR", "CL", "UC", "LC", "CC", "AUTO", "XY", "FOLLOW"}; /* msLabelPositions[] also used in mapsymbols.c (not static) */
/* static char *msBitmapFontSizes[5]={"TINY", "SMALL", "MEDIUM", "LARGE", "GIANT"}; */
/* static char *msQueryMapStyles[4]={"NORMAL", "HILITE", "SELECTED", "INVERTED"}; */
/* static char *msStatus[4]={"OFF", "ON", "DEFAULT", "EMBED"}; */
/* static char *msOnOff[2]={"OFF", "ON"}; */
/* static char *msTrueFalse[2]={"FALSE", "TRUE"}; */
/* static char *msYesNo[2]={"NO", "YES"}; */
/* static char *msJoinType[2]={"ONE-TO-ONE", "ONE-TO-MANY"}; */
/* static char *msAlignValue[3]={"LEFT","CENTER","RIGHT"}; */

/*
** Validates a string (value) against a series of patterns. We support up to four to allow cascading from classObj to
** layerObj to webObj plus a legacy pattern like TEMPLATEPATTERN.
*/
int msValidateParameter(const char *value, const char *pattern1, const char *pattern2, const char *pattern3, const char *pattern4)
{
  if(msEvalRegex(pattern1, value) == MS_TRUE) return MS_SUCCESS;
  if(msEvalRegex(pattern2, value) == MS_TRUE) return MS_SUCCESS;
  if(msEvalRegex(pattern3, value) == MS_TRUE) return MS_SUCCESS;
  if(msEvalRegex(pattern4, value) == MS_TRUE) return MS_SUCCESS;

  return(MS_FAILURE);
}

int msEvalRegex(const char *e, const char *s)
{
  ms_regex_t re;

  if(!e || !s) return(MS_FALSE);

  if(ms_regcomp(&re, e, MS_REG_EXTENDED|MS_REG_NOSUB) != 0) {
    msSetError(MS_REGEXERR, "Failed to compile expression (%s).", "msEvalRegex()", e);
    return(MS_FALSE);
  }

  if(ms_regexec(&re, s, 0, NULL, 0) != 0) { /* no match */
    ms_regfree(&re);
    return(MS_FALSE);
  }
  ms_regfree(&re);

  return(MS_TRUE);
}

#ifdef USE_MSFREE
void msFree(void *p)
{
  if(p) free(p);
}
#endif

/*
** Free memory allocated for a character array
*/
void msFreeCharArray(char **array, int num_items)
{
  int i;
  if(!array) return;
  for(i=0; i<num_items; i++)
    msFree(array[i]);
  msFree(array);
}

/*
** Checks symbol from lexer against variable length list of
** legal symbols.
*/
int getSymbol(int n, ...)
{
  int symbol;
  va_list argp;
  int i=0;

  symbol = msyylex();

  va_start(argp, n);
  while(i<n) { /* check each symbol in the list */
    if(symbol == va_arg(argp, int)) {
      va_end(argp);
      return(symbol);
    }
    i++;
  }

  va_end(argp);

  msSetError(MS_SYMERR, "Parsing error near (%s):(line %d)", "getSymbol()", msyystring_buffer, msyylineno);
  return(-1);
}

/*
** Same as getSymbol, except no error message is set on failure
*/
int getSymbol2(int n, ...)
{
  int symbol;
  va_list argp;
  int i=0;

  symbol = msyylex();

  va_start(argp, n);
  while(i<n) { /* check each symbol in the list */
    if(symbol == va_arg(argp, int)) {
      va_end(argp);
      return(symbol);
    }
    i++;
  }

  va_end(argp);
  return(-1);
}

/*
** Get a string or symbol as a string.   Operates like getString(), but also
** supports symbols.
*/
static char *getToken(void)
{
  msyylex();
  return msStrdup(msyystring_buffer);
}

/*
** Load a string from the map file. A "string" is defined in lexer.l.
*/
int getString(char **s)
{
  /* if (*s)
    msSetError(MS_SYMERR, "Duplicate item (%s):(line %d)", "getString()", msyystring_buffer, msyylineno);
    return(MS_FAILURE);
  } else */
  if(msyylex() == MS_STRING) {
    if(*s) free(*s); /* avoid leak */
    *s = msStrdup(msyystring_buffer);
    return(MS_SUCCESS);
  }

  msSetError(MS_SYMERR, "Parsing error near (%s):(line %d)", "getString()", msyystring_buffer, msyylineno);
  return(MS_FAILURE);
}

/*
** Load a floating point number from the map file. (see lexer.l)
*/
int getDouble(double *d)
{
  if(msyylex() == MS_NUMBER) {
    *d = msyynumber;
    return(0); /* success */
  }

  msSetError(MS_SYMERR, "Parsing error near (%s):(line %d)", "getDouble()", msyystring_buffer, msyylineno);
  return(-1);
}

/*
** Load a integer from the map file. (see lexer.l)
*/
int getInteger(int *i)
{
  if(msyylex() == MS_NUMBER) {
    *i = (int)msyynumber;
    return(0); /* success */
  }

  msSetError(MS_SYMERR, "Parsing error near (%s):(line %d)", "getInteger()", msyystring_buffer, msyylineno);
  return(-1);
}

int getCharacter(char *c)
{
  if(msyylex() == MS_STRING) {
    *c = msyystring_buffer[0];
    return(0);
  }

  msSetError(MS_SYMERR, "Parsing error near (%s):(line %d)", "getCharacter()", msyystring_buffer, msyylineno);
  return(-1);
}

/*
** Try to load as an integer, then try as a named symbol.
** Part of work on bug 490.
*/
int getIntegerOrSymbol(int *i, int n, ...)
{
  int symbol;
  va_list argp;
  int j=0;

  symbol = msyylex();

  if (symbol == MS_NUMBER) {
    *i = (int)msyynumber;
    return MS_SUCCESS; /* success */
  }

  va_start(argp, n);
  while (j<n) { /* check each symbol in the list */
    if(symbol == va_arg(argp, int)) {
      va_end(argp);
      *i = symbol;
      return MS_SUCCESS;
    }
    j++;
  }
  va_end(argp);

  msSetError(MS_SYMERR, "Parsing error near (%s):(line %d)",
             "getIntegerOrSymbol()", msyystring_buffer, msyylineno);
  return(-1);
}


/*
** msBuildPluginLibraryPath
**
** This function builds a path to be used dynamically to load plugin library.
*/
int msBuildPluginLibraryPath(char **dest, const char *lib_str, mapObj *map)
{
  char szLibPath[MS_MAXPATHLEN] = { '\0' };
  char szLibPathExt[MS_MAXPATHLEN] = { '\0' };
  const char *plugin_dir = NULL;
  
  if (map)
    plugin_dir = msLookupHashTable(&(map->configoptions), "MS_PLUGIN_DIR");

  /* do nothing on windows, filename without .dll will be loaded by default*/
#if !defined(_WIN32)
  if (lib_str) {
    size_t len = strlen(lib_str);
    if (3 < len && strcmp(lib_str + len-3, ".so")) {
      strlcpy(szLibPathExt, lib_str, MS_MAXPATHLEN);
      strlcat(szLibPathExt, ".so", MS_MAXPATHLEN);
      lib_str = szLibPathExt;
    }
  }
#endif /* !defined(_WIN32) */
  if (NULL == msBuildPath(szLibPath, plugin_dir, lib_str)) {
    return MS_FAILURE;
  }
  *dest = msStrdup(szLibPath);

  return MS_SUCCESS;
}

/*
** Returns the index of specified symbol or -1 if not found.
**
** If try_addimage_if_notfound==MS_TRUE then msAddImageSymbol() will be called
** to try to allocate the symbol as an image symbol.
*/
int msGetSymbolIndex(symbolSetObj *symbols, char *name, int try_addimage_if_notfound)
{
  int i;

  if(!symbols || !name) return(-1);

  /* symbol 0 has no name */
  for(i=1; i<symbols->numsymbols; i++) {
    if(symbols->symbol[i]->name)
      if(strcasecmp(symbols->symbol[i]->name, name) == 0) return(i);
  }

  if (try_addimage_if_notfound)
    return(msAddImageSymbol(symbols, name)); /* make sure it's not a filename */

  return(-1);
}

/*
** Return the index number for a given layer based on its name.
*/
int msGetLayerIndex(mapObj *map, const char *name)
{
  int i;

  if(!name) return(-1);

  for(i=0; i<map->numlayers; i++) {
    if(!GET_LAYER(map, i)->name) /* skip it */
      continue;
    if(strcmp(name, GET_LAYER(map, i)->name) == 0)
      return(i);
  }
  return(-1);
}

static
int msGetClassIndex(layerObj *layer, const char *name)
{
  int i;

  if(!name) return(-1);

  for(i=0; i<layer->numclasses; i++) {
    if(!layer->class[i]->name) /* skip it */
      continue;
    if(strcmp(name, layer->class[i]->name) == 0)
      return(i);
  }
  return(-1);
}

int loadColor(colorObj *color, attributeBindingObj *binding)
{
  int symbol;
  char hex[2];

  if(binding) {
    if((symbol = getSymbol(3, MS_NUMBER, MS_BINDING, MS_STRING)) == -1) return MS_FAILURE;
  } else {
    if((symbol = getSymbol(2, MS_NUMBER, MS_STRING)) == -1) return MS_FAILURE;
  }

  color->alpha=255;
  if(symbol == MS_NUMBER) {
    color->red = (int) msyynumber;
    if(getInteger(&(color->green)) == -1) return MS_FAILURE;
    if(getInteger(&(color->blue)) == -1) return MS_FAILURE;
  } else if(symbol == MS_STRING) {
    int len = strlen(msyystring_buffer);
    if(msyystring_buffer[0] == '#' && (len == 7 || len == 9)) { /* got a hex color w/optional alpha */
      hex[0] = msyystring_buffer[1];
      hex[1] = msyystring_buffer[2];
      color->red = msHexToInt(hex);
      hex[0] = msyystring_buffer[3];
      hex[1] = msyystring_buffer[4];
      color->green = msHexToInt(hex);
      hex[0] = msyystring_buffer[5];
      hex[1] = msyystring_buffer[6];
      color->blue = msHexToInt(hex);
      if(len == 9) {
        hex[0] = msyystring_buffer[7];
        hex[1] = msyystring_buffer[8];
        color->alpha = msHexToInt(hex);
      }
    } else {
      /* TODO: consider named colors here */
      msSetError(MS_SYMERR, "Invalid hex color (%s):(line %d)", "loadColor()", msyystring_buffer, msyylineno);
      return MS_FAILURE;
    }
  } else {
    binding->item = msStrdup(msyystring_buffer);
    binding->index = -1;
  }

  return MS_SUCCESS;
}

#if ALPHACOLOR_ENABLED
int loadColorWithAlpha(colorObj *color)
{
  char hex[2];

  if(getInteger(&(color->red)) == -1) {
    if(msyystring_buffer[0] == '#' && strlen(msyystring_buffer) == 7) { /* got a hex color */
      hex[0] = msyystring_buffer[1];
      hex[1] = msyystring_buffer[2];
      color->red = msHexToInt(hex);
      hex[0] = msyystring_buffer[3];
      hex[1] = msyystring_buffer[4];
      color->green = msHexToInt(hex);
      hex[0] = msyystring_buffer[5];
      hex[1] = msyystring_buffer[6];
      color->blue = msHexToInt(hex);
      color->alpha = 0;

      return(MS_SUCCESS);
    } else if(msyystring_buffer[0] == '#' && strlen(msyystring_buffer) == 9) { /* got a hex color with alpha */
      hex[0] = msyystring_buffer[1];
      hex[1] = msyystring_buffer[2];
      color->red = msHexToInt(hex);
      hex[0] = msyystring_buffer[3];
      hex[1] = msyystring_buffer[4];
      color->green = msHexToInt(hex);
      hex[0] = msyystring_buffer[5];
      hex[1] = msyystring_buffer[6];
      color->blue = msHexToInt(hex);
      hex[0] = msyystring_buffer[7];
      hex[1] = msyystring_buffer[8];
      color->alpha = msHexToInt(hex);
      return(MS_SUCCESS);
    }
    return(MS_FAILURE);
  }
  if(getInteger(&(color->green)) == -1) return(MS_FAILURE);
  if(getInteger(&(color->blue)) == -1) return(MS_FAILURE);
  if(getInteger(&(color->alpha)) == -1) return(MS_FAILURE);

  return(MS_SUCCESS);
}
#endif

/*
** Helper functions for writing mapfiles.
*/
static void writeLineFeed(FILE *stream)
{
  msIO_fprintf(stream, "\n");
}

static void writeIndent(FILE *stream, int indent)
{
  const char *str="  "; /* change this string to define the indent */
  int i;
  for(i=0; i<indent; i++) msIO_fprintf(stream, "%s", str);
}

static void writeBlockBegin(FILE *stream, int indent, const char *name)
{
  writeIndent(stream, indent);
  msIO_fprintf(stream, "%s\n", name);
}

static void writeBlockEnd(FILE *stream, int indent, const char *name)
{
  writeIndent(stream, indent);
  msIO_fprintf(stream, "END # %s\n", name);
}

static void writeKeyword(FILE *stream, int indent, const char *name, int value, int size, ...)
{
  va_list argp;
  int i, j=0;
  const char *s;

  va_start(argp, size);
  while (j<size) { /* check each value/keyword mapping in the list, values with no match are ignored */
    i = va_arg(argp, int);
    s = va_arg(argp, const char *);
    if(value == i) {
      writeIndent(stream, ++indent);
      msIO_fprintf(stream, "%s %s\n", name, s);
      va_end(argp);
      return;
    }
    j++;
  }
  va_end(argp);
}

static void writeDimension(FILE *stream, int indent, const char *name, double x, double y, char *bind_x, char *bind_y)
{
  writeIndent(stream, ++indent);
  if(bind_x) msIO_fprintf(stream, "%s [%s] ", name, bind_x);
  else msIO_fprintf(stream, "%s %.15g ", name, x);
  if(bind_y) msIO_fprintf(stream, "[%s]\n", bind_y);
  else msIO_fprintf(stream, "%.15g\n", y);
}

static void writeDoubleRange(FILE *stream, int indent, const char *name, double x, double y)
{
  writeIndent(stream, ++indent);
  msIO_fprintf(stream, "%s %f %f\n", name, x, y);
}

static void writeExtent(FILE *stream, int indent, const char *name, rectObj extent)
{
  if(!MS_VALID_EXTENT(extent)) return;
  writeIndent(stream, ++indent);
  msIO_fprintf(stream, "%s %.15g %.15g %.15g %.15g\n", name, extent.minx, extent.miny, extent.maxx, extent.maxy);
}

static void writeNumber(FILE *stream, int indent, const char *name, double defaultNumber, double number)
{
  if(number == defaultNumber) return; /* don't output default */
  writeIndent(stream, ++indent);
  msIO_fprintf(stream, "%s %.15g\n", name, number);
}

static void writeCharacter(FILE *stream, int indent, const char *name, const char defaultCharacter, char character)
{
  if(defaultCharacter == character) return;
  writeIndent(stream, ++indent);
  msIO_fprintf(stream, "%s '%c'\n", name, character);
}

static void writeStringElement(FILE *stream, char *string)
{
    char *string_escaped;

    if(strchr(string,'\\')) {
      string_escaped = msStrdup(string);
      string_escaped = msReplaceSubstring(string_escaped,"\\","\\\\");
    } else {
      string_escaped = string;
    }
    if ( (strchr(string_escaped, '\'') == NULL) && (strchr(string_escaped, '\"') == NULL))
      msIO_fprintf(stream, "\"%s\"", string_escaped);
    else if ( (strchr(string_escaped, '\"') != NULL) && (strchr(string_escaped, '\'') == NULL))
      msIO_fprintf(stream, "'%s'", string_escaped);
    else if ( (strchr(string_escaped, '\'') != NULL) && (strchr(string_escaped, '\"') == NULL))
      msIO_fprintf(stream, "\"%s\"", string_escaped);
    else {
      char *string_tmp = msStringEscape(string_escaped);
      msIO_fprintf(stream, "\"%s\"", string_tmp);
      if(string_escaped!=string_tmp) free(string_tmp);
    }
    if(string_escaped!=string) free(string_escaped);
}

static void writeString(FILE *stream, int indent, const char *name, const char *defaultString, char *string)
{
  if(!string) return;
  if(defaultString && strcmp(string, defaultString) == 0) return;
  writeIndent(stream, ++indent);
  if(name) msIO_fprintf(stream, "%s ", name);
  writeStringElement(stream, string);
  writeLineFeed(stream);
}

static void writeNumberOrString(FILE *stream, int indent, const char *name, double defaultNumber, double number, char *string)
{
  if(string)
    writeString(stream, indent, name, NULL, string);
  else
    writeNumber(stream, indent, name, defaultNumber, number);
}

static void writeNumberOrKeyword(FILE *stream, int indent, const char *name, double defaultNumber, double number, int value, int size, ...)
{
  va_list argp;
  int i, j=0;
  const char *s;

  va_start(argp, size);
  while (j<size) { /* check each value/keyword mapping in the list */
    i = va_arg(argp, int);
    s = va_arg(argp, const char *);
    if(value == i) {
      writeIndent(stream, ++indent);
      msIO_fprintf(stream, "%s %s\n", name, s);
      va_end(argp);
      return;
    }
    j++;
  }
  va_end(argp);

  writeNumber(stream, indent, name, defaultNumber, number);
}

static void writeNameValuePair(FILE *stream, int indent, const char *name, const char *value)
{
  if(!name || !value) return;
  writeIndent(stream, ++indent);

  writeStringElement(stream, (char*)name);
  msIO_fprintf(stream,"\t");
  writeStringElement(stream, (char*)value);
  writeLineFeed(stream);
}

static void writeAttributeBinding(FILE *stream, int indent, const char *name, attributeBindingObj *binding)
{
  if(!binding || !binding->item) return;
  writeIndent(stream, ++indent);
  msIO_fprintf(stream, "%s [%s]\n", name, binding->item);
}

static void writeColor(FILE *stream, int indent, const char *name, colorObj *defaultColor, colorObj *color)
{
  if (!defaultColor && !MS_VALID_COLOR(*color)) return;
  else if(defaultColor && MS_COMPARE_COLOR(*defaultColor, *color)) return; /* if defaultColor has the same value than the color, return.*/

  writeIndent(stream, ++indent);
#if ALPHACOLOR_ENABLED
  msIO_fprintf(stream, "%s %d %d %d\n", name, color->red, color->green, color->blue, color->alpha);
#else
  if(color->alpha != 255) {
    char buffer[9];
    sprintf(buffer, "%02x", color->red);
    sprintf(buffer+2, "%02x", color->green);
    sprintf(buffer+4, "%02x", color->blue);
    sprintf(buffer+6, "%02x", color->alpha);
    *(buffer+8) = 0;
    msIO_fprintf(stream, "%s \"#%s\"\n", name, buffer);
  } else {
    msIO_fprintf(stream, "%s %d %d %d\n", name, color->red, color->green, color->blue);
  }
#endif
}

/* todo: deal with alpha's... */
static void writeColorRange(FILE *stream, int indent, const char *name, colorObj *mincolor, colorObj *maxcolor)
{
  if(!MS_VALID_COLOR(*mincolor) || !MS_VALID_COLOR(*maxcolor)) return;
  writeIndent(stream, ++indent);
  msIO_fprintf(stream, "%s %d %d %d  %d %d %d\n", name, mincolor->red, mincolor->green, mincolor->blue, maxcolor->red, maxcolor->green, maxcolor->blue);
}

/*
** Initialize, load and free a single join
*/
void initJoin(joinObj *join)
{
  join->numitems = 0;

  join->name = NULL; /* unique join name, used for variable substitution */

  join->items = NULL; /* array to hold item names for the joined table */
  join->values = NULL; /* arrays of strings to holds one record worth of data */

  join->table = NULL;

  join->joininfo = NULL;

  join->from = NULL; /* join items */
  join->to = NULL;

  join->header = NULL;
  join->template = NULL; /* only html type templates are supported */
  join->footer = NULL;

  join->type = MS_JOIN_ONE_TO_ONE;

  join->connection = NULL;
  join->connectiontype = MS_DB_XBASE;
}

void freeJoin(joinObj *join)
{
  msFree(join->name);
  msFree(join->table);
  msFree(join->from);
  msFree(join->to);

  msFree(join->header);
  msFree(join->template);
  msFree(join->footer);

  msFreeCharArray(join->items, join->numitems); /* these may have been free'd elsewhere */
  msFreeCharArray(join->values, join->numitems);
  join->numitems = 0;

  msJoinClose(join);
  msFree(join->connection);
}

int loadJoin(joinObj *join)
{
  int nTmp;
  initJoin(join);

  for(;;) {
    switch(msyylex()) {
      case(CONNECTION):
        if(getString(&join->connection) == MS_FAILURE) return(-1);
        break;
      case(CONNECTIONTYPE):
        if((nTmp = getSymbol(5, MS_DB_XBASE, MS_DB_MYSQL, MS_DB_ORACLE, MS_DB_POSTGRES, MS_DB_CSV)) == -1) return(-1);
        join->connectiontype = nTmp;
        break;
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadJoin()");
        return(-1);
      case(END):
        if((join->from == NULL) || (join->to == NULL) || (join->table == NULL)) {
          msSetError(MS_EOFERR, "Join must define table, name, from and to properties.", "loadJoin()");
          return(-1);
        }
        if((join->type == MS_MULTIPLE) && ((join->template == NULL) || (join->name == NULL))) {
          msSetError(MS_EOFERR, "One-to-many joins must define template and name properties.", "loadJoin()");
          return(-1);
        }
        return(0);
      case(FOOTER):
        if(getString(&join->footer) == MS_FAILURE) return(-1);
        break;
      case(FROM):
        if(getString(&join->from) == MS_FAILURE) return(-1);
        break;
      case(HEADER):
        if(getString(&join->header) == MS_FAILURE) return(-1);
        break;
      case(JOIN):
        break; /* for string loads */
      case(NAME):
        if(getString(&join->name) == MS_FAILURE) return(-1);
        break;
      case(TABLE):
        if(getString(&join->table) == MS_FAILURE) return(-1);
        break;
      case(TEMPLATE):
        if(getString(&join->template) == MS_FAILURE) return(-1);
        break;
      case(TO):
        if(getString(&join->to) == MS_FAILURE) return(-1);
        break;
      case(TYPE):
        if((nTmp = getSymbol(2, MS_JOIN_ONE_TO_ONE, MS_JOIN_ONE_TO_MANY)) == -1) return(-1);
        join->type = nTmp;
        break;
      default:
        msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadJoin()", msyystring_buffer, msyylineno);
        return(-1);
    }
  } /* next token */
}

static void writeScaleToken(FILE *stream, int indent, scaleTokenObj *token) {
  int i;
  indent++;
  writeBlockBegin(stream,indent,"SCALETOKEN");
  writeString(stream, indent, "NAME", NULL, token->name);
  indent++;
  writeBlockBegin(stream,indent,"VALUES");
  for(i=0;i<token->n_entries;i++) {
    char minscale[32];
    sprintf(minscale,"%g",token->tokens[i].minscale);
    writeNameValuePair(stream, indent, minscale, token->tokens[i].value);
  }
  writeBlockEnd(stream,indent,"VALUES");
  indent--;
  writeBlockEnd(stream,indent,"SCALETOKEN");
}

static void writeJoin(FILE *stream, int indent, joinObj *join)
{
  indent++;
  writeBlockBegin(stream, indent, "JOIN");
  writeString(stream, indent, "FOOTER", NULL, join->footer);
  writeString(stream, indent, "FROM", NULL, join->from);
  writeString(stream, indent, "HEADER", NULL, join->header);
  writeString(stream, indent, "NAME", NULL, join->name);
  writeString(stream, indent, "TABLE", NULL, join->table);
  writeString(stream, indent, "TEMPLATE", NULL, join->template);
  writeString(stream, indent, "TO", NULL, join->to);
  writeKeyword(stream, indent, "CONNECTIONTYPE", join->connectiontype, 3, MS_DB_CSV, "CSV", MS_DB_POSTGRES, "POSTRESQL", MS_DB_MYSQL, "MYSQL");
  writeKeyword(stream, indent, "TYPE", join->type, 1, MS_JOIN_ONE_TO_MANY, "ONE-TO-MANY");
  writeBlockEnd(stream, indent, "JOIN");
}

/* inserts a feature at the end of the list, can create a new list */
featureListNodeObjPtr insertFeatureList(featureListNodeObjPtr *list, shapeObj *shape)
{
  featureListNodeObjPtr node;

  node = (featureListNodeObjPtr) msSmallMalloc(sizeof(featureListNodeObj));

  msInitShape(&(node->shape));
  if(msCopyShape(shape, &(node->shape)) == -1) {
    msFree(node);
    return(NULL);
  }

  /* AJS - alans@wunderground.com O(n^2) -> O(n) conversion, keep a pointer to the end */

  /* set the tailifhead to NULL, since it is only set for the head of the list */
  node->tailifhead = NULL;
  node->next = NULL;

  /* if we are at the head of the list, we need to set the list to node, before pointing tailifhead somewhere  */
  if(*list == NULL) {
    *list=node;
  } else {
    if((*list)->tailifhead!=NULL) /* this should never be NULL, but just in case */
      (*list)->tailifhead->next=node; /* put the node at the end of the list */
  }

  /* repoint the head of the list to the end  - our new element
     this causes a loop if we are at the head, be careful not to
     walk in a loop */
  (*list)->tailifhead = node;

  return(node); /* a pointer to last object in the list */
}

void freeFeatureList(featureListNodeObjPtr list)
{
  featureListNodeObjPtr listNext = NULL;
  while (list!=NULL) {
    listNext = list->next;
    msFreeShape(&(list->shape));
    msFree(list);
    list = listNext;
  }
}

/* lineObj = multipointObj */
static int loadFeaturePoints(lineObj *points)
{
  int buffer_size=0;

  points->point = (pointObj *)malloc(sizeof(pointObj)*MS_FEATUREINITSIZE);
  MS_CHECK_ALLOC(points->point, sizeof(pointObj)*MS_FEATUREINITSIZE, MS_FAILURE);
  points->numpoints = 0;
  buffer_size = MS_FEATUREINITSIZE;

  for(;;) {
    switch(msyylex()) {
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadFeaturePoints()");
        return(MS_FAILURE);
      case(END):
        return(MS_SUCCESS);
      case(MS_NUMBER):
        if(points->numpoints == buffer_size) { /* just add it to the end */
          points->point = (pointObj *) realloc(points->point, sizeof(pointObj)*(buffer_size+MS_FEATUREINCREMENT));
          MS_CHECK_ALLOC(points->point, sizeof(pointObj)*(buffer_size+MS_FEATUREINCREMENT), MS_FAILURE);
          buffer_size+=MS_FEATUREINCREMENT;
        }

        points->point[points->numpoints].x = atof(msyystring_buffer);
        if(getDouble(&(points->point[points->numpoints].y)) == -1) return(MS_FAILURE);

        points->numpoints++;
        break;
      default:
        msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadFeaturePoints()",  msyystring_buffer, msyylineno );
        return(MS_FAILURE);
    }
  }
}

static int loadFeature(layerObj *player, int type)
{
  int status=MS_SUCCESS;
  featureListNodeObjPtr *list = &(player->features);
  multipointObj points= {0,NULL};
  shapeObj *shape=NULL;

  shape = (shapeObj *) malloc(sizeof(shapeObj));
  MS_CHECK_ALLOC(shape, sizeof(shapeObj), MS_FAILURE);

  msInitShape(shape);
  shape->type = type;

  for(;;) {
    switch(msyylex()) {
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadFeature()");
        msFreeShape(shape); /* clean up */
        msFree(shape);
        return(MS_FAILURE);
      case(END):
        if(player->features != NULL && player->features->tailifhead != NULL)
          shape->index = player->features->tailifhead->shape.index + 1;
        else
          shape->index = 0;
        if(insertFeatureList(list, shape) == NULL)
          status = MS_FAILURE;

        msFreeShape(shape); /* clean up */
        msFree(shape);

        return(status);
      case(FEATURE):
        break; /* for string loads */
      case(POINTS):
        if(loadFeaturePoints(&points) == MS_FAILURE) {
          msFreeShape(shape); /* clean up */
          msFree(shape);
          return(MS_FAILURE);
        }
        status = msAddLine(shape, &points);

        msFree(points.point); /* clean up */
        points.numpoints = 0;

        if(status == MS_FAILURE) {
          msFreeShape(shape); /* clean up */
          msFree(shape);
          return(MS_FAILURE);
        }
        break;
      case(ITEMS): {
        char *string=NULL;
        if(getString(&string) == MS_FAILURE) {
          msFreeShape(shape); /* clean up */
          msFree(shape);
          return(MS_FAILURE);
        }
        if (string) {
          if(shape->values) msFreeCharArray(shape->values, shape->numvalues);
          shape->values = msStringSplitComplex(string, ";", &shape->numvalues,MS_ALLOWEMPTYTOKENS);
          msFree(string); /* clean up */
        }
        break;
      }
      case(TEXT):
        if(getString(&shape->text) == MS_FAILURE) {
          msFreeShape(shape); /* clean up */
          msFree(shape);
          return(MS_FAILURE);
        }
        break;
      case(WKT): {
        char *string=NULL;

        /* todo, what do we do with multiple WKT property occurances? */

        msFreeShape(shape);
        msFree(shape);
        if(getString(&string) == MS_FAILURE) return(MS_FAILURE);
        
        if((shape = msShapeFromWKT(string)) == NULL)
          status = MS_FAILURE;

        msFree(string); /* clean up */

        if(status == MS_FAILURE) {
          msFreeShape(shape); /* clean up */
          msFree(shape);
          return(MS_FAILURE);
        }
        break;
      }
      default:
        msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadfeature()", msyystring_buffer, msyylineno);
        msFreeShape(shape); /* clean up */
        msFree(shape);
        return(MS_FAILURE);
    }
  } /* next token */
}

static void writeFeature(FILE *stream, int indent, shapeObj *feature)
{
  int i,j;

  indent++;
  writeBlockBegin(stream, indent, "FEATURE");

  indent++;
  for(i=0; i<feature->numlines; i++) {
    writeBlockBegin(stream, indent, "POINTS");
    for(j=0; j<feature->line[i].numpoints; j++) {
      writeIndent(stream, indent);
      msIO_fprintf(stream, "%.15g %.15g\n", feature->line[i].point[j].x, feature->line[i].point[j].y);
    }
    writeBlockEnd(stream, indent, "POINTS");
  }
  indent--;

  if (feature->numvalues) {
    writeIndent(stream, indent);
    msIO_fprintf(stream, "ITEMS \"");
    for (i=0; i<feature->numvalues; i++) {
      if (i == 0)
        msIO_fprintf(stream, "%s", feature->values[i]);
      else
        msIO_fprintf(stream, ";%s", feature->values[i]);
    }
    msIO_fprintf(stream, "\"\n");
  }

  writeString(stream, indent, "TEXT", NULL, feature->text);
  writeBlockEnd(stream, indent, "FEATURE");
}

void initGrid( graticuleObj *pGraticule )
{
  memset( pGraticule, 0, sizeof( graticuleObj ) );
}

void freeGrid( graticuleObj *pGraticule )
{
  msFree(pGraticule->labelformat);
  msFree(pGraticule->pboundingpoints);
  msFree(pGraticule->pboundinglines);
}

static int loadGrid( layerObj *pLayer )
{
  for(;;) {
    switch(msyylex()) {
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadGrid()");
        return(-1);
      case(END):
        return(0);
      case(GRID):
        break; /* for string loads */
      case( LABELFORMAT ):
        if(getString(&(pLayer->grid->labelformat)) == MS_FAILURE) {
          if(strcasecmp(msyystring_buffer, "DD") == 0) /* DD triggers a symbol to be returned instead of a string so check for this special case */
            pLayer->grid->labelformat = msStrdup("DD");
          else
            return(-1);
        }
        break;
      case( MINARCS ):
        if(getDouble(&(pLayer->grid->minarcs)) == -1)
          return(-1);
        break;
      case( MAXARCS ):
        if(getDouble(&(pLayer->grid->maxarcs)) == -1)
          return(-1);
        break;
      case( MININTERVAL ):
        if(getDouble(&(pLayer->grid->minincrement)) == -1)
          return(-1);
        break;
      case( MAXINTERVAL ):
        if(getDouble(&(pLayer->grid->maxincrement)) == -1)
          return(-1);
        break;
      case( MINSUBDIVIDE ):
        if(getDouble(&(pLayer->grid->minsubdivides)) == -1)
          return(-1);
        break;
      case( MAXSUBDIVIDE ):
        if(getDouble(&(pLayer->grid->maxsubdivides)) == -1)
          return(-1);
        break;
      default:
        msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadGrid()", msyystring_buffer, msyylineno);
        return(-1);
    }
  }
}

static void writeGrid(FILE *stream, int indent, graticuleObj *pGraticule)
{
  if(!pGraticule) return;

  indent++;
  writeBlockBegin(stream, indent, "GRID");
  writeString(stream, indent, "LABELFORMAT", NULL, pGraticule->labelformat);
  writeNumber(stream, indent, "MAXARCS", 0, pGraticule->maxarcs);
  writeNumber(stream, indent, "MAXSUBDIVIDE", 0, pGraticule->maxsubdivides);
  writeNumber(stream, indent, "MAXINTERVAL", 0, pGraticule->maxincrement);
  writeNumber(stream, indent, "MINARCS", 0, pGraticule->minarcs);
  writeNumber(stream, indent, "MININTERVAL", 0, pGraticule->minincrement);
  writeNumber(stream, indent, "MINSUBDIVIDE", 0, pGraticule->minsubdivides);
  writeBlockEnd(stream, indent, "GRID");
}

/*
** Initialize, load and free a projectionObj structure
*/
int msInitProjection(projectionObj *p)
{
  p->gt.need_geotransform = MS_FALSE;
  p->numargs = 0;
  p->args = NULL;
  p->wellknownprojection = wkp_none;
#ifdef USE_PROJ
  p->proj = NULL;
  p->args = (char **)malloc(MS_MAXPROJARGS*sizeof(char *));
  MS_CHECK_ALLOC(p->args, MS_MAXPROJARGS*sizeof(char *), -1);
#if PJ_VERSION >= 480
  p->proj_ctx = NULL;
#endif
#endif
  return(0);
}

void msFreeProjection(projectionObj *p)
{
#ifdef USE_PROJ
  if(p->proj) {
    pj_free(p->proj);
    p->proj = NULL;
  }
#if PJ_VERSION >= 480
  if(p->proj_ctx) {
    pj_ctx_free(p->proj_ctx);
    p->proj_ctx = NULL;
  }
#endif

  msFreeCharArray(p->args, p->numargs);
  p->args = NULL;
  p->numargs = 0;
#endif
}

/*
** Handle OGC WMS/WFS AUTO projection in the format:
**    "AUTO:proj_id,units_id,lon0,lat0"
*/
#ifdef USE_PROJ
static int _msProcessAutoProjection(projectionObj *p)
{
  char **args;
  int numargs, nProjId, nUnitsId, nZone;
  double dLat0, dLon0;
  const char *pszUnits = "m";
  char szProjBuf[512]="";

  /* WMS/WFS AUTO projection: "AUTO:proj_id,units_id,lon0,lat0" */
  args = msStringSplit(p->args[0], ',', &numargs);
  if (numargs != 4 ||
      (strncasecmp(args[0], "AUTO:", 5) != 0 &&
       strncasecmp(args[0], "AUTO2:", 6) != 0)) {
    msSetError(MS_PROJERR,
               "WMS/WFS AUTO/AUTO2 PROJECTION must be in the format "
               "'AUTO:proj_id,units_id,lon0,lat0' or 'AUTO2:crs_id,factor,lon0,lat0'(got '%s').\n",
               "_msProcessAutoProjection()", p->args[0]);
    return -1;
  }

  if (strncasecmp(args[0], "AUTO:", 5)==0)
    nProjId = atoi(args[0]+5);
  else
    nProjId = atoi(args[0]+6);

  nUnitsId = atoi(args[1]);
  dLon0 = atof(args[2]);
  dLat0 = atof(args[3]);


  /*There is no unit parameter for AUTO2. The 2nd parameter is
   factor. Set the units to always be meter*/
  if (strncasecmp(args[0], "AUTO2:", 6) == 0)
    nUnitsId = 9001;

  msFreeCharArray(args, numargs);

  /* Handle EPSG Units.  Only meters for now. */
  switch(nUnitsId) {
    case 9001:  /* Meters */
      pszUnits = "m";
      break;
    default:
      msSetError(MS_PROJERR,
                 "WMS/WFS AUTO PROJECTION: EPSG Units %d not supported.\n",
                 "_msProcessAutoProjection()", nUnitsId);
      return -1;
  }

  /* Build PROJ4 definition.
   * This is based on the definitions found in annex E of the WMS 1.1.1
   * spec and online at http://www.digitalearth.org/wmt/auto.html
   * The conversion from the original WKT definitions to PROJ4 format was
   * done using the MapScript setWKTProjection() function (based on OGR).
   */
  switch(nProjId) {
    case 42001: /** WGS 84 / Auto UTM **/
      nZone = (int) floor( (dLon0 + 180.0) / 6.0 ) + 1;
      sprintf( szProjBuf,
               "+proj=tmerc+lat_0=0+lon_0=%.16g+k=0.999600+x_0=500000"
               "+y_0=%.16g+ellps=WGS84+datum=WGS84+units=%s",
               -183.0 + nZone * 6.0,
               (dLat0 >= 0.0) ? 0.0 : 10000000.0,
               pszUnits);
      break;
    case 42002: /** WGS 84 / Auto Tr. Mercator **/
      sprintf( szProjBuf,
               "+proj=tmerc+lat_0=0+lon_0=%.16g+k=0.999600+x_0=500000"
               "+y_0=%.16g+ellps=WGS84+datum=WGS84+units=%s",
               dLon0,
               (dLat0 >= 0.0) ? 0.0 : 10000000.0,
               pszUnits);
      break;
    case 42003: /** WGS 84 / Auto Orthographic **/
      sprintf( szProjBuf,
               "+proj=ortho+lon_0=%.16g+lat_0=%.16g+x_0=0+y_0=0"
               "+ellps=WGS84+datum=WGS84+units=%s",
               dLon0, dLat0, pszUnits );
      break;
    case 42004: /** WGS 84 / Auto Equirectangular **/
      /* Note that we have to pass lon_0 as lon_ts for this one to */
      /* work.  Either a PROJ4 bug or a PROJ4 documentation issue. */
      sprintf( szProjBuf,
               "+proj=eqc+lon_ts=%.16g+lat_ts=%.16g+x_0=0+y_0=0"
               "+ellps=WGS84+datum=WGS84+units=%s",
               dLon0, dLat0, pszUnits);
      break;
    case 42005: /** WGS 84 / Auto Mollweide **/
      sprintf( szProjBuf,
               "+proj=moll+lon_0=%.16g+x_0=0+y_0=0+ellps=WGS84"
               "+datum=WGS84+units=%s",
               dLon0, pszUnits);
      break;
    default:
      msSetError(MS_PROJERR,
                 "WMS/WFS AUTO PROJECTION %d not supported.\n",
                 "_msProcessAutoProjection()", nProjId);
      return -1;
  }

  /* msDebug("%s = %s\n", p->args[0], szProjBuf); */

  /* OK, pass the definition to pj_init() */
  args = msStringSplit(szProjBuf, '+', &numargs);

  msAcquireLock( TLOCK_PROJ );
  if( !(p->proj = pj_init(numargs, args)) ) {
    int *pj_errno_ref = pj_get_errno_ref();
    msReleaseLock( TLOCK_PROJ );
    msSetError(MS_PROJERR, "proj error \"%s\" for \"%s\"",
               "msProcessProjection()", pj_strerrno(*pj_errno_ref), szProjBuf) ;
    return(-1);
  }

  msReleaseLock( TLOCK_PROJ );

  msFreeCharArray(args, numargs);

  return(0);
}
#endif /* USE_PROJ */

int msProcessProjection(projectionObj *p)
{
#ifdef USE_PROJ
  assert( p->proj == NULL );

  if( strcasecmp(p->args[0],"GEOGRAPHIC") == 0 ) {
    msSetError(MS_PROJERR,
               "PROJECTION 'GEOGRAPHIC' no longer supported.\n"
               "Provide explicit definition.\n"
               "ie. proj=latlong\n"
               "    ellps=clrk66\n",
               "msProcessProjection()");
    return(-1);
  }

  if (strcasecmp(p->args[0], "AUTO") == 0) {
    p->proj = NULL;
    return 0;
  }

  if (strncasecmp(p->args[0], "AUTO:", 5) == 0 ||
      strncasecmp(p->args[0], "AUTO2:", 6) == 0) {
    /* WMS/WFS AUTO projection: "AUTO:proj_id,units_id,lon0,lat0" */
    /*WMS 1.3.0: AUTO2:auto_crs_id,factor,lon0,lat0*/
    return _msProcessAutoProjection(p);
  }
  msAcquireLock( TLOCK_PROJ );
#if PJ_VERSION < 480
  if( !(p->proj = pj_init(p->numargs, p->args)) ) {
#else
  p->proj_ctx = pj_ctx_alloc();
  if( !(p->proj=pj_init_ctx(p->proj_ctx, p->numargs, p->args)) ) {
#endif

    int *pj_errno_ref = pj_get_errno_ref();
    msReleaseLock( TLOCK_PROJ );
    if(p->numargs>1) {
      msSetError(MS_PROJERR, "proj error \"%s\" for \"%s:%s\"",
                 "msProcessProjection()", pj_strerrno(*pj_errno_ref), p->args[0],p->args[1]) ;
    } else {
      msSetError(MS_PROJERR, "proj error \"%s\" for \"%s\"",
                 "msProcessProjection()", pj_strerrno(*pj_errno_ref), p->args[0]) ;
    }
    return(-1);
  }

  msReleaseLock( TLOCK_PROJ );

#ifdef USE_PROJ_FASTPATHS
  if(strcasestr(p->args[0],"epsg:4326")) {
    p->wellknownprojection = wkp_lonlat;
  } else if(strcasestr(p->args[0],"epsg:3857")) {
    p->wellknownprojection = wkp_gmerc;
  } else {
    p->wellknownprojection = wkp_none;
  }
#endif


  return(0);
#else
  msSetError(MS_PROJERR, "Projection support is not available.",
             "msProcessProjection()");
  return(-1);
#endif
}

static int loadProjection(projectionObj *p)
{
#ifdef USE_PROJ
  int i=0;
#endif

  p->gt.need_geotransform = MS_FALSE;

#ifdef USE_PROJ

  if ( p->proj != NULL ) {
    msSetError(MS_MISCERR, "Projection is already initialized. Multiple projection definitions are not allowed in this object. (line %d)",
               "loadProjection()", msyylineno);
    return(-1);
  }

  for(;;) {
    switch(msyylex()) {
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadProjection()");
        return(-1);
      case(END):
        if( i == 1 && strstr(p->args[0],"+") != NULL ) {
          char *one_line_def = p->args[0];
          int result;

          p->args[0] = NULL;
          result = msLoadProjectionString( p, one_line_def );
          free( one_line_def );
          return result;
        } else {
          p->numargs = i;
          if(p->numargs != 0)
            return msProcessProjection(p);
          else
            return 0;
        }
        break;
      case(MS_STRING):
      case(MS_AUTO):
        p->args[i] = msStrdup(msyystring_buffer);
        p->automatic = MS_TRUE;
        i++;
        break;
      default:
        msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadProjection()",
                   msyystring_buffer, msyylineno);
        return(-1);
    }
  } /* next token */
#else
  msSetError(MS_PROJERR, "Projection support is not available.", "loadProjection()");
  return(-1);
#endif
}


/************************************************************************/
/*                     msLoadProjectionStringEPSGLike                   */
/************************************************************************/

static int msLoadProjectionStringEPSGLike(projectionObj *p, const char *value,
                                          const char* pszPrefix,
                                          int bFollowEPSGAxisOrder)
{
    size_t buffer_size = 0;
    char *init_string =  NULL;
    const char *code;
    const char *next_sep;
    size_t prefix_len;

    prefix_len = strlen(pszPrefix);
    if( strncasecmp(value, pszPrefix, prefix_len) != 0 )
        return -1;

    code = value + prefix_len;
    next_sep = strchr(code, pszPrefix[prefix_len-1]);
    if( next_sep != NULL )
        code = next_sep + 1;

    buffer_size = 10 + strlen(code) + 1;
    init_string = (char*)msSmallMalloc(buffer_size);

    /* translate into PROJ.4 format. */
    snprintf( init_string, buffer_size, "init=epsg:%s", code );

    p->args = (char**)msSmallMalloc(sizeof(char*) * 2);
    p->args[0] = init_string;
    p->numargs = 1;

    if( bFollowEPSGAxisOrder && msIsAxisInverted(atoi(code))) {
      p->args[1] = msStrdup("+epsgaxis=ne");
      p->numargs = 2;
    }

    return 0;
}

/************************************************************************/
/*                     msLoadProjectionStringCRSLike                    */
/************************************************************************/

static int msLoadProjectionStringCRSLike(projectionObj *p, const char *value,
                                         const char* pszPrefix)
{
    char init_string[100];
    const char *id;
    const char *next_sep;
    size_t prefix_len;

    prefix_len = strlen(pszPrefix);
    if( strncasecmp(value, pszPrefix, prefix_len) != 0 )
        return -1;

    id = value + prefix_len;
    next_sep = strchr(id, pszPrefix[prefix_len-1]);
    if( next_sep != NULL )
        id = next_sep + 1;

    init_string[0] = '\0';

    if( strcasecmp(id,"84") == 0 || strcasecmp(id,"CRS84") == 0 )
      strncpy( init_string, "init=epsg:4326", sizeof(init_string) );
    else if( strcasecmp(id,"83") == 0 || strcasecmp(id,"CRS83") == 0 )
      strncpy( init_string, "init=epsg:4269", sizeof(init_string) );
    else if( strcasecmp(id,"27") == 0 || strcasecmp(id,"CRS27") == 0 )
      strncpy( init_string, "init=epsg:4267", sizeof(init_string) );
    else {
      msSetError( MS_PROJERR,
                  "Unrecognised OGC CRS def '%s'.",
                  "msLoadProjectionString()",
                  value );
      return -1;
    }

    p->args = (char**)msSmallMalloc(sizeof(char*) * 2);
    p->args[0] = msStrdup(init_string);
    p->numargs = 1;

    return 0;
}

/************************************************************************/
/*                         msLoadProjectionStringEPSG                   */
/*                                                                      */
/*      Checks for EPSG type projection and set the axes for a          */
/*      certain code ranges.                                            */
/*      Use for now in WMS 1.3.0 and WFS >= 1.1.0                       */
/************************************************************************/
int msLoadProjectionStringEPSG(projectionObj *p, const char *value)
{
#ifdef USE_PROJ
  assert(p);
  msFreeProjection(p);

  p->gt.need_geotransform = MS_FALSE;
#ifdef USE_PROJ_FASTPATHS
  if(strcasestr(value,"epsg:4326")) {
    p->wellknownprojection = wkp_lonlat;
  } else if(strcasestr(value,"epsg:3857")) {
    p->wellknownprojection = wkp_gmerc;
  } else {
    p->wellknownprojection = wkp_none;
  }
#endif

  if( msLoadProjectionStringEPSGLike(p, value, "EPSG:", MS_TRUE) == 0 )
  {
    return msProcessProjection( p );
  }

  return msLoadProjectionString(p, value);

#else
  msSetError(MS_PROJERR, "Projection support is not available.",
             "msLoadProjectionStringEPSG()");
  return(-1);
#endif
}

int msLoadProjectionString(projectionObj *p, const char *value)
{
  assert(p);
  p->gt.need_geotransform = MS_FALSE;

#ifdef USE_PROJ
  msFreeProjection(p);


  /*
   * Handle new style definitions, the same as they would be given to
   * the proj program.
   * eg.
   *    "+proj=utm +zone=11 +ellps=WGS84"
   */
  if( value[0] == '+' ) {
    char  *trimmed;
    int i, i_out=0;

    trimmed = msStrdup(value+1);
    for( i = 1; value[i] != '\0'; i++ ) {
      if( !isspace( value[i] ) )
        trimmed[i_out++] = value[i];
    }
    trimmed[i_out] = '\0';

    p->args = msStringSplit(trimmed,'+', &p->numargs);
    free( trimmed );
  } else if (strncasecmp(value, "AUTO:", 5) == 0 ||
             strncasecmp(value, "AUTO2:", 6) == 0) {
    /* WMS/WFS AUTO projection: "AUTO:proj_id,units_id,lon0,lat0" */
    /* WMS 1.3.0 projection: "AUTO2:auto_crs_id,factor,lon0,lat0"*/
    /* Keep the projection defn into a single token for writeProjection() */
    /* to work fine. */
    p->args = (char**)msSmallMalloc(sizeof(char*));
    p->args[0] = msStrdup(value);
    p->numargs = 1;
  } else if (msLoadProjectionStringEPSGLike(p, value, "EPSG:", MS_FALSE) == 0 ) {
   /* Assume lon/lat ordering. Use msLoadProjectionStringEPSG() if wanting to follow EPSG axis */
  } else if (msLoadProjectionStringEPSGLike(p, value, "urn:ogc:def:crs:EPSG:", MS_TRUE) == 0 ) {
  } else if (msLoadProjectionStringEPSGLike(p, value, "urn:EPSG:geographicCRS:", MS_TRUE) == 0 ) {
  } else if (msLoadProjectionStringEPSGLike(p, value, "urn:x-ogc:def:crs:EPSG:", MS_TRUE) == 0 ) {
    /*this case is to account for OGC CITE tests where x-ogc was used
      before the ogc name became an official NID. Note also we also account
      for the fact that a space for the version of the espg is not used with CITE tests.
      (Syntax used could be urn:ogc:def:objectType:authority:code)*/
  } else if (msLoadProjectionStringCRSLike(p, value, "urn:ogc:def:crs:OGC:") == 0 ) {
  } else if (msLoadProjectionStringEPSGLike(p, value, "http://www.opengis.net/def/crs/EPSG/", MS_TRUE) == 0 ) {
    /* URI projection support */
  } else if (msLoadProjectionStringCRSLike(p, value, "http://www.opengis.net/def/crs/OGC/") == 0 ) {
    /* Mandatory support for this URI format specified in WFS1.1 (also in 1.0?) */
  } else if (msLoadProjectionStringEPSGLike(p, value, "http://www.opengis.net/gml/srs/epsg.xml#", MS_FALSE) == 0 ) {
    /* We assume always lon/lat ordering, as that is what GeoServer does... */
  } else if (msLoadProjectionStringCRSLike(p, value, "CRS:") == 0 ) {
  }
  /*
   * Handle old style comma delimited.  eg. "proj=utm,zone=11,ellps=WGS84".
   */
  else {
    p->args = msStringSplit(value,',', &p->numargs);
  }

  return msProcessProjection( p );
#else
  msSetError(MS_PROJERR, "Projection support is not available.",
             "msLoadProjectionString()");
  return(-1);
#endif
}

static void writeProjection(FILE *stream, int indent, projectionObj *p)
{
#ifdef USE_PROJ
  int i;

  if(!p || p->numargs <= 0) return;
  indent++;
  writeBlockBegin(stream, indent, "PROJECTION");
  for(i=0; i<p->numargs; i++)
    writeString(stream, indent, NULL, NULL, p->args[i]);
  writeBlockEnd(stream, indent, "PROJECTION");
#endif
}

void initLeader(labelLeaderObj *leader)
{
  leader->gridstep = 5;
  leader->maxdistance = 0;

  /* Set maxstyles = 0, styles[] will be allocated as needed on first call
   * to msGrowLabelLeaderStyles()
   */
  leader->numstyles = leader->maxstyles = 0;
  leader->styles = NULL;
}

/*
** Initialize, load and free a labelObj structure
*/
void initLabel(labelObj *label)
{
  int i;

  MS_REFCNT_INIT(label);

  label->align = MS_ALIGN_DEFAULT;
  MS_INIT_COLOR(label->color, 0,0,0,255);
  MS_INIT_COLOR(label->outlinecolor, -1,-1,-1,255); /* don't use it */
  label->outlinewidth=1;

  MS_INIT_COLOR(label->shadowcolor, -1,-1,-1,255); /* don't use it */
  label->shadowsizex = label->shadowsizey = 1;

  label->font = NULL;
  label->size = MS_MEDIUM;

  label->position = MS_CC;
  label->angle = 0;
  label->anglemode = MS_NONE;
  label->minsize = MS_MINFONTSIZE;
  label->maxsize = MS_MAXFONTSIZE;
  label->buffer = 0;
  label->offsetx = label->offsety = 0;
  label->minscaledenom=-1;
  label->maxscaledenom=-1;
  label->minfeaturesize = -1; /* no limit */
  label->autominfeaturesize = MS_FALSE;
  label->mindistance = -1; /* no limit */
  label->repeatdistance = 0; /* no repeat */
  label->maxoverlapangle = 22.5; /* default max overlap angle */
  label->partials = MS_FALSE;
  label->wrap = '\0';
  label->maxlength = 0;
  label->minlength = 0;
  label->space_size_10=0.0;

  label->encoding = NULL;

  label->force = MS_OFF;
  label->priority = MS_DEFAULT_LABEL_PRIORITY;

  /* Set maxstyles = 0, styles[] will be allocated as needed on first call
   * to msGrowLabelStyles()
   */
  label->numstyles = label->maxstyles = 0;
  label->styles = NULL;

  label->numbindings = 0;
  for(i=0; i<MS_LABEL_BINDING_LENGTH; i++) {
    label->bindings[i].item = NULL;
    label->bindings[i].index = -1;
  }

  msInitExpression(&(label->expression));
  msInitExpression(&(label->text));

  label->leader = NULL;

  return;
}

int freeLabelLeader(labelLeaderObj *leader)
{
  int i;
  for(i=0; i<leader->numstyles; i++) {
    msFree(leader->styles[i]);
  }
  msFree(leader->styles);

  return MS_SUCCESS;
}
int freeLabel(labelObj *label)
{
  int i;

  if( MS_REFCNT_DECR_IS_NOT_ZERO(label) ) {
    return MS_FAILURE;
  }

  msFree(label->font);
  msFree(label->encoding);

  for(i=0; i<label->numstyles; i++) { /* each style */
    if(label->styles[i]!=NULL) {
      if(freeStyle(label->styles[i]) == MS_SUCCESS) {
        msFree(label->styles[i]);
      }
    }
  }
  msFree(label->styles);

  for(i=0; i<MS_LABEL_BINDING_LENGTH; i++)
    msFree(label->bindings[i].item);

  msFreeExpression(&(label->expression));
  msFreeExpression(&(label->text));

  if(label->leader) {
    freeLabelLeader(label->leader);
    msFree(label->leader);
    label->leader = NULL;
  }

  return MS_SUCCESS;
}

static int loadLeader(labelLeaderObj *leader)
{
  for(;;) {
    switch(msyylex()) {
      case(END):
        return(0);
        break;
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadLeader()");
        return(-1);
      case GRIDSTEP:
        if(getInteger(&(leader->gridstep)) == -1) return(-1);
        break;
      case MAXDISTANCE:
        if(getInteger(&(leader->maxdistance)) == -1) return(-1);
        break;
      case STYLE:
        if(msGrowLeaderStyles(leader) == NULL)
          return(-1);
        initStyle(leader->styles[leader->numstyles]);
        if(loadStyle(leader->styles[leader->numstyles]) != MS_SUCCESS) return(-1);
        leader->numstyles++;
        break;
      default:
        if(strlen(msyystring_buffer) > 0) {
          msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadLeader()", msyystring_buffer, msyylineno);
          return(-1);
        } else {
          return(0); /* end of a string, not an error */
        }
    }
  }
}

static int loadLabel(labelObj *label)
{
  int symbol;

  for(;;) {
    switch(msyylex()) {
      case(ANGLE):
        if((symbol = getSymbol(5, MS_NUMBER,MS_AUTO,MS_AUTO2,MS_FOLLOW,MS_BINDING)) == -1)
          return(-1);

        if(symbol == MS_NUMBER)
          label->angle = msyynumber;
        else if(symbol == MS_BINDING) {
          if (label->bindings[MS_LABEL_BINDING_ANGLE].item != NULL)
            msFree(label->bindings[MS_LABEL_BINDING_ANGLE].item);
          label->bindings[MS_LABEL_BINDING_ANGLE].item = msStrdup(msyystring_buffer);
          label->numbindings++;
        } else {
          label->anglemode = symbol;
        }
        break;
      case(ALIGN):
        if((label->align = getSymbol(3, MS_ALIGN_LEFT,MS_ALIGN_CENTER,MS_ALIGN_RIGHT)) == -1) return(-1);
        break;
      case(ANTIALIAS): /*ignore*/
        msyylex();
        break;
      case(BUFFER):
        if(getInteger(&(label->buffer)) == -1) return(-1);
        break;
      case(COLOR):
        if(loadColor(&(label->color), &(label->bindings[MS_LABEL_BINDING_COLOR])) != MS_SUCCESS) return(-1);
        if(label->bindings[MS_LABEL_BINDING_COLOR].item) label->numbindings++;
        break;
      case(ENCODING):
        if((getString(&label->encoding)) == MS_FAILURE) return(-1);
        break;
      case(END):
        return(0);
        break;
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadLabel()");
        freeLabel(label);       /* free any structures allocated before EOF */
        return(-1);
      case(EXPRESSION):
        if(loadExpression(&(label->expression)) == -1) return(-1); /* loadExpression() cleans up previously allocated expression */
        if(msyysource == MS_URL_TOKENS) {
          msSetError(MS_MISCERR, "URL-based EXPRESSION configuration not supported." , "loadLabel()");
          msFreeExpression(&(label->expression));
          return(-1);
        }
        break;
      case(FONT):
        if((symbol = getSymbol(2, MS_STRING, MS_BINDING)) == -1)
          return(-1);

        if(symbol == MS_STRING) {
          if (label->font != NULL)
            msFree(label->font);
          label->font = msStrdup(msyystring_buffer);
        } else {
          if (label->bindings[MS_LABEL_BINDING_FONT].item != NULL)
            msFree(label->bindings[MS_LABEL_BINDING_FONT].item);
          label->bindings[MS_LABEL_BINDING_FONT].item = msStrdup(msyystring_buffer);
          label->numbindings++;
        }
        break;
      case(FORCE):
        switch(msyylex()) {
          case MS_ON:
            label->force = MS_ON;
            break;
          case MS_OFF:
            label->force = MS_OFF;
            break;
          case GROUP:
            label->force = MS_LABEL_FORCE_GROUP;
            break;
          default:
            msSetError(MS_MISCERR, "Invalid FORCE, must be ON,OFF,or GROUP" , "loadLabel()");
            return(-1);
        }
        break;
      case(LABEL):
        break; /* for string loads */
      case(LEADER):
        msSetError(MS_MISCERR, "LABEL LEADER not implemented. LEADER goes at the CLASS level." , "loadLabel()");
        return(-1);
        label->leader = msSmallMalloc(sizeof(labelLeaderObj));
        if(loadLeader(label->leader) == -1) return(-1);
        break;
      case(MAXSIZE):
        if(getInteger(&(label->maxsize)) == -1) return(-1);
        break;
      case(MAXSCALEDENOM):
        if(getDouble(&(label->maxscaledenom)) == -1) return(-1);
        break;
      case(MAXLENGTH):
        if(getInteger(&(label->maxlength)) == -1) return(-1);
        break;
      case(MINLENGTH):
        if(getInteger(&(label->minlength)) == -1) return(-1);
        break;
      case(MINDISTANCE):
        if(getInteger(&(label->mindistance)) == -1) return(-1);
        break;
      case(REPEATDISTANCE):
        if(getInteger(&(label->repeatdistance)) == -1) return(-1);
        break;
      case(MAXOVERLAPANGLE):
        if(getDouble(&(label->maxoverlapangle)) == -1) return(-1);
        break;
      case(MINFEATURESIZE):
        if((symbol = getSymbol(2, MS_NUMBER,MS_AUTO)) == -1)  return(-1);
        if(symbol == MS_NUMBER)
          label->minfeaturesize = (int)msyynumber;
        else
          label->autominfeaturesize = MS_TRUE;
        break;
      case(MINSCALEDENOM):
        if(getDouble(&(label->minscaledenom)) == -1) return(-1);
        break;
      case(MINSIZE):
        if(getInteger(&(label->minsize)) == -1) return(-1);
        break;
      case(OFFSET):
        if(getInteger(&(label->offsetx)) == -1) return(-1);
        if(getInteger(&(label->offsety)) == -1) return(-1);
        break;
      case(OUTLINECOLOR):
        if(loadColor(&(label->outlinecolor), &(label->bindings[MS_LABEL_BINDING_OUTLINECOLOR])) != MS_SUCCESS) return(-1);
        if(label->bindings[MS_LABEL_BINDING_OUTLINECOLOR].item) label->numbindings++;
        break;
      case(OUTLINEWIDTH):
        if(getInteger(&(label->outlinewidth)) == -1) return(-1);
        break;
      case(PARTIALS):
        if((label->partials = getSymbol(2, MS_TRUE,MS_FALSE)) == -1) return(-1);
        break;
      case(POSITION):
        if((label->position = getSymbol(11, MS_UL,MS_UC,MS_UR,MS_CL,MS_CC,MS_CR,MS_LL,MS_LC,MS_LR,MS_AUTO,MS_BINDING)) == -1)
          return(-1);
        if(label->position == MS_BINDING) {
          if(label->bindings[MS_LABEL_BINDING_POSITION].item != NULL)
            msFree(label->bindings[MS_LABEL_BINDING_POSITION].item);
          label->bindings[MS_LABEL_BINDING_POSITION].item = msStrdup(msyystring_buffer);
          label->numbindings++;
        }
        break;
      case(PRIORITY):
        if((symbol = getSymbol(2, MS_NUMBER,MS_BINDING)) == -1) return(-1);
        if(symbol == MS_NUMBER) {
          label->priority = (int) msyynumber;
          if(label->priority < 1 || label->priority > MS_MAX_LABEL_PRIORITY) {
            msSetError(MS_MISCERR, "Invalid PRIORITY, must be an integer between 1 and %d." , "loadLabel()", MS_MAX_LABEL_PRIORITY);
            return(-1);
          }
        } else {
          if (label->bindings[MS_LABEL_BINDING_PRIORITY].item != NULL)
            msFree(label->bindings[MS_LABEL_BINDING_PRIORITY].item);
          label->bindings[MS_LABEL_BINDING_PRIORITY].item = msStrdup(msyystring_buffer);
          label->numbindings++;
        }
        break;
      case(SHADOWCOLOR):
        if(loadColor(&(label->shadowcolor), NULL) != MS_SUCCESS) return(-1);
        break;
      case(SHADOWSIZE):
        /* if(getInteger(&(label->shadowsizex)) == -1) return(-1); */
        if((symbol = getSymbol(2, MS_NUMBER,MS_BINDING)) == -1) return(-1);
        if(symbol == MS_NUMBER) {
          label->shadowsizex = (int) msyynumber;
        } else {
          if (label->bindings[MS_LABEL_BINDING_SHADOWSIZEX].item != NULL)
            msFree(label->bindings[MS_LABEL_BINDING_SHADOWSIZEX].item);
          label->bindings[MS_LABEL_BINDING_SHADOWSIZEX].item = msStrdup(msyystring_buffer);
          label->numbindings++;
        }

        /* if(getInteger(&(label->shadowsizey)) == -1) return(-1); */
        if((symbol = getSymbol(2, MS_NUMBER,MS_BINDING)) == -1) return(-1);
        if(symbol == MS_NUMBER) {
          label->shadowsizey = (int) msyynumber;
        } else {
          if (label->bindings[MS_LABEL_BINDING_SHADOWSIZEY].item != NULL)
            msFree(label->bindings[MS_LABEL_BINDING_SHADOWSIZEY].item);
          label->bindings[MS_LABEL_BINDING_SHADOWSIZEY].item = msStrdup(msyystring_buffer);
          label->numbindings++;
        }
        break;
      case(SIZE):
        if(label->bindings[MS_LABEL_BINDING_SIZE].item) {
          msFree(label->bindings[MS_LABEL_BINDING_SIZE].item);
          label->bindings[MS_LABEL_BINDING_SIZE].item = NULL;
          label->numbindings--;
        }

        if((symbol = getSymbol(7, MS_NUMBER,MS_BINDING,MS_TINY,MS_SMALL,MS_MEDIUM,MS_LARGE,MS_GIANT)) == -1)
          return(-1);

        if(symbol == MS_NUMBER) {
          label->size = (double) msyynumber;
        } else if(symbol == MS_BINDING) {
          label->bindings[MS_LABEL_BINDING_SIZE].item = msStrdup(msyystring_buffer);
          label->numbindings++;
        } else
          label->size = symbol;
        break;
      case(STYLE):
        if(msGrowLabelStyles(label) == NULL)
          return(-1);
        initStyle(label->styles[label->numstyles]);
        if(loadStyle(label->styles[label->numstyles]) != MS_SUCCESS) return(-1);
        if(label->styles[label->numstyles]->_geomtransform.type == MS_GEOMTRANSFORM_NONE)
          label->styles[label->numstyles]->_geomtransform.type = MS_GEOMTRANSFORM_LABELPOINT; /* set a default, a marker? */
        label->numstyles++;
        break;
      case(TEXT):
        if(loadExpression(&(label->text)) == -1) return(-1); /* loadExpression() cleans up previously allocated expression */
        if(msyysource == MS_URL_TOKENS) {
          msSetError(MS_MISCERR, "URL-based TEXT configuration not supported for labels." , "loadLabel()");
          msFreeExpression(&(label->text));
          return(-1);
        }
        if((label->text.type != MS_STRING) && (label->text.type != MS_EXPRESSION)) {
          msSetError(MS_MISCERR, "Text expressions support constant or tagged replacement strings." , "loadLabel()");
          return(-1);
        }
        break;
      case(TYPE):
        if(getSymbol(2, MS_TRUETYPE,MS_BITMAP) == -1) return(-1); /* ignore TYPE */
        break;
      case(WRAP):
        if(getCharacter(&(label->wrap)) == -1) return(-1);
        break;
      default:
        if(strlen(msyystring_buffer) > 0) {
          msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadLabel()", msyystring_buffer, msyylineno);
          return(-1);
        } else {
          return(0); /* end of a string, not an error */
        }
    }
  } /* next token */
}

int msUpdateLabelFromString(labelObj *label, char *string, int url_string)
{
  if(!label || !string) return MS_FAILURE;

  msAcquireLock( TLOCK_PARSER );
  
  if(url_string)
    msyystate = MS_TOKENIZE_URL_STRING;
  else
    msyystate = MS_TOKENIZE_STRING;

  msyystring = string;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyylineno = 1; /* start at line 1 */

  if(loadLabel(label) == -1) {
    msReleaseLock( TLOCK_PARSER );
    return MS_FAILURE; /* parse error */;
  }
  msReleaseLock( TLOCK_PARSER );

  msyylex_destroy();
  return MS_SUCCESS;
}

static void writeLeader(FILE *stream, int indent, labelLeaderObj *leader)
{
  int i;
  if(leader->maxdistance == 0 && leader->numstyles == 0) {
    return;
  }
  indent++;
  writeBlockBegin(stream, indent, "LEADER");
  writeNumber(stream, indent, "MAXDISTANCE", 0, leader->maxdistance);
  writeNumber(stream, indent, "GRIDSTEP", 5, leader->gridstep);
  for(i=0; i<leader->numstyles; i++)
    writeStyle(stream, indent, leader->styles[i]);

  writeBlockEnd(stream, indent, "LEADER");
}

static void writeLabel(FILE *stream, int indent, labelObj *label)
{
  int i;
  colorObj c;

  if(label->size == -1) return; /* there is no default label anymore */

  indent++;
  writeBlockBegin(stream, indent, "LABEL");

  if(label->numbindings > 0 && label->bindings[MS_LABEL_BINDING_ANGLE].item)
    writeAttributeBinding(stream, indent, "ANGLE", &(label->bindings[MS_LABEL_BINDING_ANGLE]));
  else writeNumberOrKeyword(stream, indent, "ANGLE", 0, label->angle, label->anglemode, 3, MS_FOLLOW, "FOLLOW", MS_AUTO, "AUTO", MS_AUTO2, "AUTO2");

  writeExpression(stream, indent, "EXPRESSION", &(label->expression));

  if(label->numbindings > 0 && label->bindings[MS_LABEL_BINDING_FONT].item)
    writeAttributeBinding(stream, indent, "FONT", &(label->bindings[MS_LABEL_BINDING_FONT]));
  else writeString(stream, indent, "FONT", NULL, label->font);

  writeNumber(stream, indent, "MAXSIZE",  MS_MAXFONTSIZE, label->maxsize);
  writeNumber(stream, indent, "MINSIZE",  MS_MINFONTSIZE, label->minsize);

  if(label->numbindings > 0 && label->bindings[MS_LABEL_BINDING_SIZE].item)
    writeAttributeBinding(stream, indent, "SIZE", &(label->bindings[MS_LABEL_BINDING_SIZE]));
  else writeNumber(stream, indent, "SIZE", -1, label->size);

  writeKeyword(stream, indent, "ALIGN", label->align, 3, MS_ALIGN_LEFT, "LEFT", MS_ALIGN_CENTER, "CENTER", MS_ALIGN_RIGHT, "RIGHT");
  writeNumber(stream, indent, "BUFFER", 0, label->buffer);

  if(label->numbindings > 0 && label->bindings[MS_LABEL_BINDING_COLOR].item)
    writeAttributeBinding(stream, indent, "COLOR", &(label->bindings[MS_LABEL_BINDING_COLOR]));
  else {
    MS_INIT_COLOR(c,0,0,0,255);
    writeColor(stream, indent, "COLOR", &c, &(label->color));
  }

  writeString(stream, indent, "ENCODING", NULL, label->encoding);
  if(label->leader)
    writeLeader(stream,indent,label->leader);
  writeKeyword(stream, indent, "FORCE", label->force, 2, MS_TRUE, "TRUE", MS_LABEL_FORCE_GROUP, "GROUP");
  writeNumber(stream, indent, "MAXLENGTH", 0, label->maxlength);
  writeNumber(stream, indent, "MAXSCALEDENOM", -1, label->maxscaledenom);
  writeNumber(stream, indent, "MINDISTANCE", -1, label->mindistance);
  writeNumberOrKeyword(stream, indent, "MINFEATURESIZE", -1, label->minfeaturesize, 1, label->autominfeaturesize, MS_TRUE, "AUTO");
  writeNumber(stream, indent, "MINLENGTH", 0, label->minlength);
  writeNumber(stream, indent, "MINSCALEDENOM", -1, label->minscaledenom);
  writeDimension(stream, indent, "OFFSET",  label->offsetx, label->offsety, NULL, NULL);

  if(label->numbindings > 0 && label->bindings[MS_LABEL_BINDING_OUTLINECOLOR].item)
    writeAttributeBinding(stream, indent, "OUTLINECOLOR", &(label->bindings[MS_LABEL_BINDING_OUTLINECOLOR]));
  else  writeColor(stream, indent, "OUTLINECOLOR", NULL, &(label->outlinecolor));

  writeNumber(stream, indent, "OUTLINEWIDTH", 1, label->outlinewidth);
  writeKeyword(stream, indent, "PARTIALS", label->partials, 1, MS_TRUE, "TRUE");

  if(label->numbindings > 0 && label->bindings[MS_LABEL_BINDING_POSITION].item)
    writeAttributeBinding(stream, indent, "POSITION", &(label->bindings[MS_LABEL_BINDING_POSITION]));
  else writeKeyword(stream, indent, "POSITION", label->position, 10, MS_UL, "UL", MS_UC, "UC", MS_UR, "UR", MS_CL, "CL", MS_CC, "CC", MS_CR, "CR", MS_LL, "LL", MS_LC, "LC", MS_LR, "LR", MS_AUTO, "AUTO");

  if(label->numbindings > 0 && label->bindings[MS_LABEL_BINDING_PRIORITY].item)
    writeAttributeBinding(stream, indent, "PRIORITY", &(label->bindings[MS_LABEL_BINDING_PRIORITY]));
  else writeNumber(stream, indent, "PRIORITY", MS_DEFAULT_LABEL_PRIORITY, label->priority);

  writeNumber(stream, indent, "REPEATDISTANCE", 0, label->repeatdistance);
  writeColor(stream, indent, "SHADOWCOLOR", NULL, &(label->shadowcolor));
  writeDimension(stream, indent, "SHADOWSIZE", label->shadowsizex, label->shadowsizey, label->bindings[MS_LABEL_BINDING_SHADOWSIZEX].item, label->bindings[MS_LABEL_BINDING_SHADOWSIZEY].item);

  writeNumber(stream, indent, "MAXOVERLAPANGLE", 22.5, label->maxoverlapangle);
  for(i=0; i<label->numstyles; i++)
    writeStyle(stream, indent, label->styles[i]);

  writeExpression(stream, indent, "TEXT", &(label->text));

  writeCharacter(stream, indent, "WRAP", '\0', label->wrap);
  writeBlockEnd(stream, indent, "LABEL");
}

char* msWriteLabelToString(labelObj *label)
{
  msIOContext  context;
  msIOBuffer buffer;

  context.label = NULL;
  context.write_channel = MS_TRUE;
  context.readWriteFunc = msIO_bufferWrite;
  context.cbData = &buffer;
  buffer.data = NULL;
  buffer.data_len = 0;
  buffer.data_offset = 0;

  msIO_installHandlers( NULL, &context, NULL );

  writeLabel(stdout, -1, label);
  msIO_bufferWrite( &buffer, "", 1 );

  msIO_installHandlers( NULL, NULL, NULL );

  return (char*)buffer.data;
}

void msInitExpression(expressionObj *exp)
{
  exp->type = MS_STRING;
  exp->string = NULL;
  exp->native_string = NULL;
  exp->compiled = MS_FALSE;
  exp->flags = 0;
  exp->tokens = exp->curtoken = NULL;
}

void msFreeExpressionTokens(expressionObj *exp)
{
  tokenListNodeObjPtr node = NULL;
  tokenListNodeObjPtr nextNode = NULL;

  if(!exp) return;

  if(exp->tokens) {
    node = exp->tokens;
    while (node != NULL) {
      nextNode = node->next;

      msFree(node->tokensrc); /* not set very often */

      switch(node->token) {
        case MS_TOKEN_BINDING_DOUBLE:
        case MS_TOKEN_BINDING_INTEGER:
        case MS_TOKEN_BINDING_STRING:
        case MS_TOKEN_BINDING_TIME:
          msFree(node->tokenval.bindval.item);
          break;
        case MS_TOKEN_LITERAL_TIME:
          /* anything to do? */
          break;
        case MS_TOKEN_LITERAL_STRING:
          msFree(node->tokenval.strval);
          break;
        case MS_TOKEN_LITERAL_SHAPE:
          msFreeShape(node->tokenval.shpval);
          free(node->tokenval.shpval);
          break;
      }

      msFree(node);
      node = nextNode;
    }
    exp->tokens = exp->curtoken = NULL;
  }
}

void msFreeExpression(expressionObj *exp)
{
  if(!exp) return;
  msFree(exp->string);
  msFree(exp->native_string);
  if((exp->type == MS_REGEX) && exp->compiled) ms_regfree(&(exp->regex));
  msFreeExpressionTokens(exp);
  msInitExpression(exp); /* re-initialize */
}

int loadExpression(expressionObj *exp)
{
  /* TODO: should we fall msFreeExpression if exp->string != NULL? We do some checking to avoid a leak but is it enough... */ 

  msyystring_icase = MS_TRUE;
  if((exp->type = getSymbol(6, MS_STRING,MS_EXPRESSION,MS_REGEX,MS_ISTRING,MS_IREGEX,MS_LIST)) == -1) return(-1);
  if (exp->string != NULL) {
    msFree(exp->string);
    msFree(exp->native_string);
  }
  exp->string = msStrdup(msyystring_buffer);

  if(exp->type == MS_ISTRING) {
    exp->flags = exp->flags | MS_EXP_INSENSITIVE;
    exp->type = MS_STRING;
  } else if(exp->type == MS_IREGEX) {
    exp->flags = exp->flags | MS_EXP_INSENSITIVE;
    exp->type = MS_REGEX;
  }

  return(0);
}

/* ---------------------------------------------------------------------------
   msLoadExpressionString and loadExpressionString

   msLoadExpressionString wraps call to loadExpressionString with mutex
   acquisition and release.  This function should be used everywhere outside
   the mapfile loading phase of an application.  loadExpressionString does
   not check for a mutex!  It should be used only within code that has
   properly acquired a mutex.

   See bug 339 for more details -- SG.
   ------------------------------------------------------------------------ */

int msLoadExpressionString(expressionObj *exp, char *value)
{
  int retval = MS_FAILURE;

  msAcquireLock( TLOCK_PARSER );
  retval = loadExpressionString( exp, value );
  msReleaseLock( TLOCK_PARSER );

  return retval;
}

int loadExpressionString(expressionObj *exp, char *value)
{
  msyystate = MS_TOKENIZE_STRING;
  msyystring = value;
  msyylex(); /* sets things up but processes no tokens */

  msFreeExpression(exp); /* we're totally replacing the old expression so free (which re-inits) to start over */

  msyystring_icase = MS_TRUE;
  if((exp->type = getSymbol2(5, MS_EXPRESSION,MS_REGEX,MS_IREGEX,MS_ISTRING,MS_LIST)) != -1) {
    exp->string = msStrdup(msyystring_buffer);

    if(exp->type == MS_ISTRING) {
      exp->type = MS_STRING;
      exp->flags = exp->flags | MS_EXP_INSENSITIVE;
    } else if(exp->type == MS_IREGEX) {
      exp->type = MS_REGEX;
      exp->flags = exp->flags | MS_EXP_INSENSITIVE;
    }
  } else {
    /* failure above is not an error since we'll consider anything not matching (like an unquoted number) as a STRING) */
    exp->type = MS_STRING;
    if((strlen(value) - strlen(msyystring_buffer)) == 2)
      exp->string = msStrdup(msyystring_buffer); /* value was quoted */
    else
      exp->string = msStrdup(value); /* use the whole value */
  }

  return(0);
}

/* msGetExpressionString()
 *
 * Returns the string representation of this expression, including delimiters
 * and any flags (e.g. i = case-insensitive).
 *
 * Returns a newly allocated buffer that should be freed by the caller or NULL.
 */
char *msGetExpressionString(expressionObj *exp)
{
  if(exp->string) {
    char *exprstring;
    size_t buffer_size;
    const char *case_insensitive = "";

    if(exp->flags & MS_EXP_INSENSITIVE)
      case_insensitive = "i";

    /* Alloc buffer big enough for string + 2 delimiters + 'i' + \0 */
    buffer_size = strlen(exp->string)+4;
    exprstring = (char*)msSmallMalloc(buffer_size);

    switch(exp->type) {
      case(MS_REGEX):
        snprintf(exprstring, buffer_size, "/%s/%s", exp->string, case_insensitive);
        return exprstring;
      case(MS_STRING):
        snprintf(exprstring, buffer_size, "\"%s\"%s", exp->string, case_insensitive);
        return exprstring;
      case(MS_EXPRESSION):
        snprintf(exprstring, buffer_size, "(%s)", exp->string);
        return exprstring;
      case(MS_LIST):
        snprintf(exprstring, buffer_size, "{%s}", exp->string);
        return exprstring;
      default:
        /* We should never get to here really! */
        free(exprstring);
        return NULL;
    }
  }
  return NULL;
}

static void writeExpression(FILE *stream, int indent, const char *name, expressionObj *exp)
{
  if(!exp || !exp->string) return;

  writeIndent(stream, ++indent);
  switch(exp->type) {
    case(MS_LIST):
      fprintf(stream, "%s {%s}", name, exp->string);
      break;
    case(MS_REGEX):
      msIO_fprintf(stream, "%s /%s/", name, exp->string);
      break;
    case(MS_STRING):
      msIO_fprintf(stream, "%s ", name);
      writeStringElement(stream, exp->string);
      break;
    case(MS_EXPRESSION):
      msIO_fprintf(stream, "%s (%s)", name, exp->string);
      break;
  }
  if((exp->type == MS_STRING || exp->type == MS_REGEX) && (exp->flags & MS_EXP_INSENSITIVE))
    msIO_fprintf(stream, "i");
  writeLineFeed(stream);
}

int loadHashTable(hashTableObj *ptable)
{
  char *key=NULL, *data=NULL;
  assert(ptable);

  for(;;) {
    switch(msyylex()) {
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadHashTable()");
        return(MS_FAILURE);
      case(END):
        return(MS_SUCCESS);
      case(MS_STRING):
        key = msStrdup(msyystring_buffer); /* the key is *always* a string */
        if(getString(&data) == MS_FAILURE) return(MS_FAILURE);
        msInsertHashTable(ptable, key, data);

        free(key);
        free(data);
        data=NULL;
        break;
      default:
        msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadHashTable()", msyystring_buffer, msyylineno );
        return(MS_FAILURE);
    }
  }

  return(MS_SUCCESS);
}

static void writeHashTable(FILE *stream, int indent, const char *title, hashTableObj *table)
{
  struct hashObj *tp;
  int i;

  if(!table) return;
  if(msHashIsEmpty(table)) return;

  indent++;
  writeBlockBegin(stream, indent, title);
  for (i=0; i<MS_HASHSIZE; i++) {
    if (table->items[i] != NULL) {
      for (tp=table->items[i]; tp!=NULL; tp=tp->next)
        writeNameValuePair(stream, indent, tp->key, tp->data);
    }
  }
  writeBlockEnd(stream, indent, title);
}

static void writeHashTableInline(FILE *stream, int indent, char *name, hashTableObj* table)
{
  struct hashObj *tp = NULL;
  int i;

  if(!table) return;
  if(msHashIsEmpty(table)) return;

  ++indent;
  for (i=0; i<MS_HASHSIZE; ++i) {
    if (table->items[i] != NULL) {
      for (tp=table->items[i]; tp!=NULL; tp=tp->next) {
        writeIndent(stream, indent);
        msIO_fprintf(stream, "%s ", name);
        writeStringElement(stream, tp->key);
        msIO_fprintf(stream," ");
        writeStringElement(stream, tp->data);
        writeLineFeed(stream);
      }
    }
  }
}

/*
** Initialize, load and free a cluster object
*/
void initCluster(clusterObj *cluster)
{
  cluster->maxdistance = 10;
  cluster->buffer = 0;
  cluster->region = NULL;
  msInitExpression(&(cluster->group));
  msInitExpression(&(cluster->filter));
}

void freeCluster(clusterObj *cluster)
{
  msFree(cluster->region);
  msFreeExpression(&(cluster->group));
  msFreeExpression(&(cluster->filter));
}

int loadCluster(clusterObj *cluster)
{
  for(;;) {
    switch(msyylex()) {
      case(CLUSTER):
        break; /* for string loads */
      case(MAXDISTANCE):
        if(getDouble(&(cluster->maxdistance)) == -1) return(-1);
        break;
      case(BUFFER):
        if(getDouble(&(cluster->buffer)) == -1) return(-1);
        break;
      case(REGION):
        if(getString(&cluster->region) == MS_FAILURE) return(-1);
        break;
      case(END):
        return(0);
        break;
      case(GROUP):
        if(loadExpression(&(cluster->group)) == -1) return(-1);
        break;
      case(FILTER):
        if(loadExpression(&(cluster->filter)) == -1) return(-1);
        break;
      default:
        if(strlen(msyystring_buffer) > 0) {
          msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadCluster()", msyystring_buffer, msyylineno);
          return(-1);
        } else {
          return(0); /* end of a string, not an error */
        }

    }
  }
  return(MS_SUCCESS);
}

int msUpdateClusterFromString(clusterObj *cluster, char *string)
{
  if(!cluster || !string) return MS_FAILURE;

  msAcquireLock( TLOCK_PARSER );

  msyystate = MS_TOKENIZE_STRING;
  msyystring = string;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyylineno = 1; /* start at line 1 */

  if(loadCluster(cluster) == -1) {
    msReleaseLock( TLOCK_PARSER );
    return MS_FAILURE; /* parse error */;
  }
  msReleaseLock( TLOCK_PARSER );

  msyylex_destroy();
  return MS_SUCCESS;
}

static void writeCluster(FILE *stream, int indent, clusterObj *cluster)
{

  if (cluster->maxdistance == 10 &&
      cluster->buffer == 0.0 &&
      cluster->region == NULL &&
      cluster->group.string == NULL &&
      cluster->filter.string == NULL)
    return;  /* Nothing to write */

  indent++;
  writeBlockBegin(stream, indent, "CLUSTER");
  writeNumber(stream, indent, "MAXDISTANCE", 10, cluster->maxdistance);
  writeNumber(stream, indent, "BUFFER", 0, cluster->buffer);
  writeString(stream, indent, "REGION", NULL, cluster->region);
  writeExpression(stream, indent, "GROUP", &(cluster->group));
  writeExpression(stream, indent, "FILTER", &(cluster->filter));
  writeBlockEnd(stream, indent, "CLUSTER");
}

char* msWriteClusterToString(clusterObj *cluster)
{
  msIOContext  context;
  msIOBuffer buffer;

  context.label = NULL;
  context.write_channel = MS_TRUE;
  context.readWriteFunc = msIO_bufferWrite;
  context.cbData = &buffer;
  buffer.data = NULL;
  buffer.data_len = 0;
  buffer.data_offset = 0;

  msIO_installHandlers( NULL, &context, NULL );

  writeCluster(stdout, -1, cluster);
  msIO_bufferWrite( &buffer, "", 1 );

  msIO_installHandlers( NULL, NULL, NULL );

  return (char*)buffer.data;
}

/*
** Initialize, load and free a single style
*/
int initStyle(styleObj *style)
{
  int i;
  MS_REFCNT_INIT(style);
  MS_INIT_COLOR(style->color, -1,-1,-1,255); /* must explictly set colors */
  MS_INIT_COLOR(style->backgroundcolor, -1,-1,-1,255);
  MS_INIT_COLOR(style->outlinecolor, -1,-1,-1,255);
  /* New Color Range fields*/
  MS_INIT_COLOR(style->mincolor, -1,-1,-1,255);
  MS_INIT_COLOR(style->maxcolor, -1,-1,-1,255);
  style->minvalue = 0.0;
  style->maxvalue = 1.0;
  style->rangeitem = NULL;
  /* End Color Range fields*/
  style->symbol = 0; /* there is always a default symbol*/
  style->symbolname = NULL;
  style->size = -1; /* in SIZEUNITS (layerObj) */
  style->minsize = MS_MINSYMBOLSIZE;
  style->maxsize = MS_MAXSYMBOLSIZE;
  style->width = 1; /* in pixels */
  style->outlinewidth = 0; /* in pixels */
  style->minwidth = MS_MINSYMBOLWIDTH;
  style->maxwidth = MS_MAXSYMBOLWIDTH;
  style->minscaledenom=style->maxscaledenom = -1.0;
  style->offsetx = style->offsety = 0; /* no offset */
  style->polaroffsetpixel = style->polaroffsetangle = 0; /* no polar offset */
  style->angle = 0;
  style->autoangle= MS_FALSE;
  style->opacity = 100; /* fully opaque */

  msInitExpression(&(style->_geomtransform));
  style->_geomtransform.type = MS_GEOMTRANSFORM_NONE;

  style->patternlength = 0; /* solid line */
  style->gap = 0;
  style->initialgap = -1;
  style->position = MS_CC;
  style->linecap = MS_CJC_DEFAULT_CAPS;
  style->linejoin = MS_CJC_DEFAULT_JOINS;
  style->linejoinmaxsize = MS_CJC_DEFAULT_JOIN_MAXSIZE;

  style->numbindings = 0;
  for(i=0; i<MS_STYLE_BINDING_LENGTH; i++) {
    style->bindings[i].item = NULL;
    style->bindings[i].index = -1;
  }

  return MS_SUCCESS;
}

int loadStyle(styleObj *style)
{
  int symbol;

  for(;;) {
    switch(msyylex()) {
        /* New Color Range fields*/
      case (COLORRANGE):
        /*These are both in one line now*/
        if(loadColor(&(style->mincolor), NULL) != MS_SUCCESS) return(MS_FAILURE);
        if(loadColor(&(style->maxcolor), NULL) != MS_SUCCESS) return(MS_FAILURE);
        break;
      case(DATARANGE):
        /*These are both in one line now*/
        if(getDouble(&(style->minvalue)) == -1) return(-1);
        if(getDouble(&(style->maxvalue)) == -1) return(-1);
        break;
      case(RANGEITEM):
        if(getString(&style->rangeitem) == MS_FAILURE) return(-1);
        break;
        /* End Range fields*/
      case(ANGLE):
        if((symbol = getSymbol(3, MS_NUMBER,MS_BINDING,MS_AUTO)) == -1) return(MS_FAILURE);

        if(symbol == MS_NUMBER)
          style->angle = (double) msyynumber;
        else if(symbol==MS_BINDING) {
          if (style->bindings[MS_STYLE_BINDING_ANGLE].item != NULL)
            msFree(style->bindings[MS_STYLE_BINDING_ANGLE].item);
          style->bindings[MS_STYLE_BINDING_ANGLE].item = msStrdup(msyystring_buffer);
          style->numbindings++;
        } else {
          style->autoangle=MS_TRUE;
        }
        break;
      case(ANTIALIAS): /*ignore*/
        msyylex();
        break;
      case(BACKGROUNDCOLOR):
        if(loadColor(&(style->backgroundcolor), NULL) != MS_SUCCESS) return(MS_FAILURE);
        break;
      case(COLOR):
        if(loadColor(&(style->color), &(style->bindings[MS_STYLE_BINDING_COLOR])) != MS_SUCCESS) return(MS_FAILURE);
        if(style->bindings[MS_STYLE_BINDING_COLOR].item) style->numbindings++;
        break;
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadStyle()");
        return(MS_FAILURE); /* missing END (probably) */
      case(END): {
        int alpha;

        /* apply opacity as the alpha channel color(s) */
        if(style->opacity < 100) {
          alpha = MS_NINT(style->opacity*2.55);

          style->color.alpha = alpha;
          style->outlinecolor.alpha = alpha;
          style->backgroundcolor.alpha = alpha;

          style->mincolor.alpha = alpha;
          style->maxcolor.alpha = alpha;
        }

        return(MS_SUCCESS);
      }
      break;
      case(GAP):
        if((getDouble(&style->gap)) == -1) return(MS_FAILURE);
        break;
      case(INITIALGAP):
        if((getDouble(&style->initialgap)) == -1) return(MS_FAILURE);
        if(style->initialgap < 0) {
          msSetError(MS_MISCERR, "INITIALGAP requires a positive values", "loadStyle()");
          return(MS_FAILURE);
        }
        break;
      case(MAXSCALEDENOM):
        if(getDouble(&(style->maxscaledenom)) == -1) return(MS_FAILURE);
        break;
      case(MINSCALEDENOM):
        if(getDouble(&(style->minscaledenom)) == -1) return(MS_FAILURE);
        break;
      case(GEOMTRANSFORM): {
        int s;
        if((s = getSymbol(2, MS_STRING, MS_EXPRESSION)) == -1) return(MS_FAILURE);
        if(s == MS_STRING)
          msStyleSetGeomTransform(style, msyystring_buffer);
        else {
          /* handle expression case here for the moment */
          msFree(style->_geomtransform.string);
          style->_geomtransform.string = msStrdup(msyystring_buffer);
          style->_geomtransform.type = MS_GEOMTRANSFORM_EXPRESSION;
        }
      }
      break;
      case(LINECAP):
        if((style->linecap = getSymbol(4,MS_CJC_BUTT, MS_CJC_ROUND, MS_CJC_SQUARE, MS_CJC_TRIANGLE)) == -1) return(MS_FAILURE);
        break;
      case(LINEJOIN):
        if((style->linejoin = getSymbol(4,MS_CJC_NONE, MS_CJC_ROUND, MS_CJC_MITER, MS_CJC_BEVEL)) == -1) return(MS_FAILURE);
        break;
      case(LINEJOINMAXSIZE):
        if((getDouble(&style->linejoinmaxsize)) == -1) return(MS_FAILURE);
        break;
      case(MAXSIZE):
        if(getDouble(&(style->maxsize)) == -1) return(MS_FAILURE);
        break;
      case(MINSIZE):
        if(getDouble(&(style->minsize)) == -1) return(MS_FAILURE);
        break;
      case(MAXWIDTH):
        if(getDouble(&(style->maxwidth)) == -1) return(MS_FAILURE);
        break;
      case(MINWIDTH):
        if(getDouble(&(style->minwidth)) == -1) return(MS_FAILURE);
        break;
      case(OFFSET):
        if((symbol = getSymbol(2, MS_NUMBER,MS_BINDING)) == -1) return(MS_FAILURE);
        if(symbol == MS_NUMBER)
          style->offsetx = (double) msyynumber;
        else {
          if (style->bindings[MS_STYLE_BINDING_OFFSET_X].item != NULL)
            msFree(style->bindings[MS_STYLE_BINDING_OFFSET_X].item);
          style->bindings[MS_STYLE_BINDING_OFFSET_X].item = msStrdup(msyystring_buffer);
          style->numbindings++;
        }

        if((symbol = getSymbol(2, MS_NUMBER,MS_BINDING)) == -1) return(MS_FAILURE);
        if(symbol == MS_NUMBER)
          style->offsety = (double) msyynumber;
        else {
          if (style->bindings[MS_STYLE_BINDING_OFFSET_Y].item != NULL)
            msFree(style->bindings[MS_STYLE_BINDING_OFFSET_Y].item);
          style->bindings[MS_STYLE_BINDING_OFFSET_Y].item = msStrdup(msyystring_buffer);
          style->numbindings++;
        }
        break;
      case(OPACITY):
        if((symbol = getSymbol(2, MS_NUMBER,MS_BINDING)) == -1) return(MS_FAILURE);
        if(symbol == MS_NUMBER)
          style->opacity = MS_MAX(MS_MIN((int) msyynumber, 100), 0); /* force opacity to between 0 and 100 */
        else {
          if (style->bindings[MS_STYLE_BINDING_OPACITY].item != NULL)
            msFree(style->bindings[MS_STYLE_BINDING_OPACITY].item);
          style->bindings[MS_STYLE_BINDING_OPACITY].item = msStrdup(msyystring_buffer);
          style->numbindings++;
        }
        break;
      case(OUTLINECOLOR):
        if(loadColor(&(style->outlinecolor), &(style->bindings[MS_STYLE_BINDING_OUTLINECOLOR])) != MS_SUCCESS) return(MS_FAILURE);
        if(style->bindings[MS_STYLE_BINDING_OUTLINECOLOR].item) style->numbindings++;
        break;
      case(PATTERN): {
        int done = MS_FALSE;
        for(;;) { /* read till the next END */
          switch(msyylex()) {
            case(END):
              if(style->patternlength < 2) {
                msSetError(MS_SYMERR, "Not enough pattern elements. A minimum of 2 are required", "loadStyle()");
                return(MS_FAILURE);
              }
              done = MS_TRUE;
              break;
            case(MS_NUMBER): /* read the pattern values */
              if(style->patternlength == MS_MAXPATTERNLENGTH) {
                msSetError(MS_SYMERR, "Pattern too long.", "loadStyle()");
                return(-1);
              }
              style->pattern[style->patternlength] = atof(msyystring_buffer);
              style->patternlength++;
              break;
            default:
              msSetError(MS_TYPEERR, "Parsing error near (%s):(line %d)", "loadStyle()", msyystring_buffer, msyylineno);
              return(-1);
          }
          if(done == MS_TRUE)
            break;
        }
        break;
      }
      case(POSITION):
        /* if((s->position = getSymbol(3, MS_UC,MS_CC,MS_LC)) == -1)  */
        /* return(-1); */
        if((style->position = getSymbol(9, MS_UL,MS_UC,MS_UR,MS_CL,MS_CC,MS_CR,MS_LL,MS_LC,MS_LR)) == -1)
          return(-1);
        break;
      case(OUTLINEWIDTH):
        if((symbol = getSymbol(2, MS_NUMBER,MS_BINDING)) == -1) return(MS_FAILURE);
        if(symbol == MS_NUMBER) {
          style->outlinewidth = (double) msyynumber;
          if(style->outlinewidth < 0) {
            msSetError(MS_MISCERR, "Invalid OUTLINEWIDTH, must be greater than 0" , "loadStyle()");
            return(MS_FAILURE);
          }
        } else {
          if (style->bindings[MS_STYLE_BINDING_OUTLINEWIDTH].item != NULL)
            msFree(style->bindings[MS_STYLE_BINDING_OUTLINEWIDTH].item);
          style->bindings[MS_STYLE_BINDING_OUTLINEWIDTH].item = msStrdup(msyystring_buffer);
          style->numbindings++;
        }
        break;
      case(SIZE):
        if((symbol = getSymbol(2, MS_NUMBER,MS_BINDING)) == -1) return(MS_FAILURE);
        if(symbol == MS_NUMBER)
          style->size = (double) msyynumber;
        else {
          if (style->bindings[MS_STYLE_BINDING_SIZE].item != NULL)
            msFree(style->bindings[MS_STYLE_BINDING_SIZE].item);
          style->bindings[MS_STYLE_BINDING_SIZE].item = msStrdup(msyystring_buffer);
          style->numbindings++;
        }
        break;
      case(STYLE):
        break; /* for string loads */
      case(SYMBOL):
        if((symbol = getSymbol(3, MS_NUMBER,MS_STRING,MS_BINDING)) == -1) return(MS_FAILURE);
        if(symbol == MS_NUMBER) {
          if (style->symbolname != NULL) {
            msFree(style->symbolname);
            style->symbolname = NULL;
          }
          style->symbol = (int) msyynumber;
        } else if(symbol == MS_STRING) {
          if (style->symbolname != NULL)
            msFree(style->symbolname);
          style->symbolname = msStrdup(msyystring_buffer);
        } else {
          if (style->bindings[MS_STYLE_BINDING_SYMBOL].item != NULL)
            msFree(style->bindings[MS_STYLE_BINDING_SYMBOL].item);
          style->bindings[MS_STYLE_BINDING_SYMBOL].item = msStrdup(msyystring_buffer);
          style->numbindings++;
        }
        break;
      case(WIDTH):
        if((symbol = getSymbol(2, MS_NUMBER,MS_BINDING)) == -1) return(MS_FAILURE);
        if(symbol == MS_NUMBER)
          style->width = (double) msyynumber;
        else {
          if (style->bindings[MS_STYLE_BINDING_WIDTH].item != NULL)
            msFree(style->bindings[MS_STYLE_BINDING_WIDTH].item);
          style->bindings[MS_STYLE_BINDING_WIDTH].item = msStrdup(msyystring_buffer);
          style->numbindings++;
        }
        break;
      case(POLAROFFSET):
        if((symbol = getSymbol(2, MS_NUMBER,MS_BINDING)) == -1) return(MS_FAILURE);
        if(symbol == MS_NUMBER)
          style->polaroffsetpixel = (double) msyynumber;
        else {
          if (style->bindings[MS_STYLE_BINDING_POLAROFFSET_PIXEL].item != NULL)
            msFree(style->bindings[MS_STYLE_BINDING_POLAROFFSET_PIXEL].item);
          style->bindings[MS_STYLE_BINDING_POLAROFFSET_PIXEL].item = msStrdup(msyystring_buffer);
          style->numbindings++;
        }

        if((symbol = getSymbol(2, MS_NUMBER,MS_BINDING)) == -1) return(MS_FAILURE);
        if(symbol == MS_NUMBER)
          style->polaroffsetangle = (double) msyynumber;
        else {
          if (style->bindings[MS_STYLE_BINDING_POLAROFFSET_ANGLE].item != NULL)
            msFree(style->bindings[MS_STYLE_BINDING_POLAROFFSET_ANGLE].item);
          style->bindings[MS_STYLE_BINDING_POLAROFFSET_ANGLE].item = msStrdup(msyystring_buffer);
          style->numbindings++;
        }
        break;
      default:
        if(strlen(msyystring_buffer) > 0) {
          msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadStyle()", msyystring_buffer, msyylineno);
          return(MS_FAILURE);
        } else {
          return(MS_SUCCESS); /* end of a string, not an error */
        }
    }
  }
}

int msUpdateStyleFromString(styleObj *style, char *string, int url_string)
{
  if(!style || !string) return MS_FAILURE;

  msAcquireLock( TLOCK_PARSER );

  if(url_string)
    msyystate = MS_TOKENIZE_URL_STRING;
  else
    msyystate = MS_TOKENIZE_STRING;
  msyystring = string;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyylineno = 1; /* start at line 1 */

  if(loadStyle(style) == -1) {
    msReleaseLock( TLOCK_PARSER );
    return MS_FAILURE; /* parse error */;
  }
  msReleaseLock( TLOCK_PARSER );

  msyylex_destroy();
  return MS_SUCCESS;
}

int freeStyle(styleObj *style)
{
  int i;

  if( MS_REFCNT_DECR_IS_NOT_ZERO(style) ) {
    return MS_FAILURE;
  }

  msFree(style->symbolname);
  msFreeExpression(&style->_geomtransform);
  msFree(style->rangeitem);

  for(i=0; i<MS_STYLE_BINDING_LENGTH; i++)
    msFree(style->bindings[i].item);

  return MS_SUCCESS;
}

void writeStyle(FILE *stream, int indent, styleObj *style)
{

  indent++;
  writeBlockBegin(stream, indent, "STYLE");

  if(style->numbindings > 0 && style->bindings[MS_STYLE_BINDING_ANGLE].item)
    writeAttributeBinding(stream, indent, "ANGLE", &(style->bindings[MS_STYLE_BINDING_ANGLE]));
  else writeNumberOrKeyword(stream, indent, "ANGLE", 0, style->angle, style->autoangle, 1, MS_TRUE, "AUTO");

  writeColor(stream, indent, "BACKGROUNDCOLOR", NULL, &(style->backgroundcolor));

  if(style->numbindings > 0 && style->bindings[MS_STYLE_BINDING_COLOR].item)
    writeAttributeBinding(stream, indent, "COLOR", &(style->bindings[MS_STYLE_BINDING_COLOR]));
  else writeColor(stream, indent, "COLOR", NULL, &(style->color));

  writeNumber(stream, indent, "GAP", 0, style->gap);
  writeNumber(stream, indent, "INITIALGAP", -1, style->initialgap);

  if(style->_geomtransform.type == MS_GEOMTRANSFORM_EXPRESSION) {
    writeIndent(stream, indent + 1);
    msIO_fprintf(stream, "GEOMTRANSFORM (%s)\n", style->_geomtransform.string);
  }
  else if(style->_geomtransform.type != MS_GEOMTRANSFORM_NONE) {
    writeKeyword(stream, indent, "GEOMTRANSFORM", style->_geomtransform.type, 7,
                 MS_GEOMTRANSFORM_BBOX, "\"bbox\"",
                 MS_GEOMTRANSFORM_END, "\"end\"",
                 MS_GEOMTRANSFORM_LABELPOINT, "\"labelpnt\"",
                 MS_GEOMTRANSFORM_LABELPOLY, "\"labelpoly\"",
                 MS_GEOMTRANSFORM_LABELCENTER, "\"labelcenter\"",
                 MS_GEOMTRANSFORM_START, "\"start\"",
                 MS_GEOMTRANSFORM_VERTICES, "\"vertices\"",
                 MS_GEOMTRANSFORM_CENTROID, "\"centroid\""
                );
  }

  if(style->linecap != MS_CJC_DEFAULT_CAPS) {
    writeKeyword(stream,indent,"LINECAP",(int)style->linecap,5,
                 MS_CJC_NONE,"NONE",
                 MS_CJC_ROUND, "ROUND",
                 MS_CJC_SQUARE, "SQUARE",
                 MS_CJC_BUTT, "BUTT",
                 MS_CJC_TRIANGLE, "TRIANGLE");
  }
  if(style->linejoin != MS_CJC_DEFAULT_JOINS) {
    writeKeyword(stream,indent,"LINEJOIN",(int)style->linejoin,5,
                 MS_CJC_NONE,"NONE",
                 MS_CJC_ROUND, "ROUND",
                 MS_CJC_BEVEL, "BEVEL",
                 MS_CJC_MITER, "MITER");
  }
  writeNumber(stream, indent, "LINEJOINMAXSIZE", MS_CJC_DEFAULT_JOIN_MAXSIZE , style->linejoinmaxsize);


  writeNumber(stream, indent, "MAXSCALEDENOM", -1, style->maxscaledenom);
  writeNumber(stream, indent, "MAXSIZE", MS_MAXSYMBOLSIZE, style->maxsize);
  writeNumber(stream, indent, "MAXWIDTH", MS_MAXSYMBOLWIDTH, style->maxwidth);
  writeNumber(stream, indent, "MINSCALEDENOM", -1, style->minscaledenom);
  writeNumber(stream, indent, "MINSIZE", MS_MINSYMBOLSIZE, style->minsize);
  writeNumber(stream, indent, "MINWIDTH", MS_MINSYMBOLWIDTH, style->minwidth);
  if((style->numbindings > 0 && (style->bindings[MS_STYLE_BINDING_OFFSET_X].item||style->bindings[MS_STYLE_BINDING_OFFSET_Y].item))||style->offsetx!=0||style->offsety!=0)
    writeDimension(stream, indent, "OFFSET", style->offsetx, style->offsety, style->bindings[MS_STYLE_BINDING_OFFSET_X].item, style->bindings[MS_STYLE_BINDING_OFFSET_Y].item);
  if((style->numbindings > 0 && (style->bindings[MS_STYLE_BINDING_POLAROFFSET_PIXEL].item||style->bindings[MS_STYLE_BINDING_POLAROFFSET_ANGLE].item))||style->polaroffsetangle!=0||style->polaroffsetpixel!=0)
    writeDimension(stream, indent, "POLAROFFSET", style->polaroffsetpixel, style->polaroffsetangle,
                 style->bindings[MS_STYLE_BINDING_POLAROFFSET_PIXEL].item, style->bindings[MS_STYLE_BINDING_POLAROFFSET_ANGLE].item);

  if(style->numbindings > 0 && style->bindings[MS_STYLE_BINDING_OPACITY].item)
    writeAttributeBinding(stream, indent, "OPACITY", &(style->bindings[MS_STYLE_BINDING_OPACITY]));
  else writeNumber(stream, indent, "OPACITY", 100, style->opacity);

  if(style->numbindings > 0 && style->bindings[MS_STYLE_BINDING_OUTLINECOLOR].item)
    writeAttributeBinding(stream, indent, "OUTLINECOLOR", &(style->bindings[MS_STYLE_BINDING_OUTLINECOLOR]));
  else  writeColor(stream, indent, "OUTLINECOLOR", NULL, &(style->outlinecolor));

  if(style->numbindings > 0 && style->bindings[MS_STYLE_BINDING_OUTLINEWIDTH].item)
    writeAttributeBinding(stream, indent, "OUTLINEWIDTH", &(style->bindings[MS_STYLE_BINDING_OUTLINEWIDTH]));
  else writeNumber(stream, indent, "OUTLINEWIDTH", 0, style->outlinewidth);

  /* PATTERN */
  if(style->patternlength != 0) {
    int i;
    indent++;
    writeBlockBegin(stream,indent,"PATTERN");
    writeIndent(stream, indent);
    for(i=0; i<style->patternlength; i++)
      msIO_fprintf(stream, " %.2f", style->pattern[i]);
    msIO_fprintf(stream,"\n");
    writeBlockEnd(stream,indent,"PATTERN");
    indent--;
  }

  if(style->position != MS_CC) {
    writeKeyword(stream, indent, "POSITION", style->position, 9,
                 MS_UL, "UL", MS_UC, "UC", MS_UR, "UR", MS_CL, "CL",
                 MS_CC, "CC", MS_CR, "CR", MS_LL, "LL", MS_LC, "LC",
                 MS_LR, "LR");
  }

  if(style->numbindings > 0 && style->bindings[MS_STYLE_BINDING_SIZE].item)
    writeAttributeBinding(stream, indent, "SIZE", &(style->bindings[MS_STYLE_BINDING_SIZE]));
  else writeNumber(stream, indent, "SIZE", -1, style->size);

  if(style->numbindings > 0 && style->bindings[MS_STYLE_BINDING_SYMBOL].item)
    writeAttributeBinding(stream, indent, "SYMBOL", &(style->bindings[MS_STYLE_BINDING_SYMBOL]));
  else writeNumberOrString(stream, indent, "SYMBOL", 0, style->symbol, style->symbolname);

  if(style->numbindings > 0 && style->bindings[MS_STYLE_BINDING_WIDTH].item)
    writeAttributeBinding(stream, indent, "WIDTH", &(style->bindings[MS_STYLE_BINDING_WIDTH]));
  else writeNumber(stream, indent, "WIDTH", 1, style->width);

  if(style->rangeitem) {
    writeString(stream, indent, "RANGEITEM", NULL, style->rangeitem);
    writeColorRange(stream, indent, "COLORRANGE", &(style->mincolor), &(style->maxcolor));
    writeDoubleRange(stream, indent, "DATARANGE", style->minvalue, style->maxvalue);
  }

  writeBlockEnd(stream, indent, "STYLE");
}

char* msWriteStyleToString(styleObj *style)
{
  msIOContext  context;
  msIOBuffer buffer;

  context.label = NULL;
  context.write_channel = MS_TRUE;
  context.readWriteFunc = msIO_bufferWrite;
  context.cbData = &buffer;
  buffer.data = NULL;
  buffer.data_len = 0;
  buffer.data_offset = 0;

  msIO_installHandlers( NULL, &context, NULL );

  writeStyle(stdout, -1, style);
  msIO_bufferWrite( &buffer, "", 1 );

  msIO_installHandlers( NULL, NULL, NULL );

  return (char*)buffer.data;
}

/*
** Initialize, load and free a single class
*/
int initClass(classObj *class)
{
  class->status = MS_ON;
  class->debug = MS_OFF;
  MS_REFCNT_INIT(class);

  msInitExpression(&(class->expression));
  class->name = NULL;
  class->title = NULL;
  msInitExpression(&(class->text));

  class->template = NULL;

  initHashTable(&(class->metadata));
  initHashTable(&(class->validation));

  class->maxscaledenom = class->minscaledenom = -1.0;
  class->minfeaturesize = -1; /* no limit */

  /* Set maxstyles = 0, styles[] will be allocated as needed on first call
   * to msGrowClassStyles()
   */
  class->numstyles = class->maxstyles = 0;
  class->styles = NULL;

  class->numlabels = class->maxlabels = 0;
  class->labels = NULL;

  class->keyimage = NULL;

  class->group = NULL;

  class->leader = NULL;

  return(0);
}

int freeClass(classObj *class)
{
  int i;

  if( MS_REFCNT_DECR_IS_NOT_ZERO(class) ) {
    return MS_FAILURE;
  }

  msFreeExpression(&(class->expression));
  msFreeExpression(&(class->text));
  msFree(class->name);
  msFree(class->title);
  msFree(class->template);
  msFree(class->group);

  if (&(class->metadata)) msFreeHashItems(&(class->metadata));
  if (&(class->validation)) msFreeHashItems(&(class->validation));

  for(i=0; i<class->numstyles; i++) { /* each style */
    if(class->styles[i]!=NULL) {
      if(freeStyle(class->styles[i]) == MS_SUCCESS) {
        msFree(class->styles[i]);
      }
    }
  }
  msFree(class->styles);

  for(i=0; i<class->numlabels; i++) { /* each label */
    if(class->labels[i]!=NULL) {
      if(freeLabel(class->labels[i]) == MS_SUCCESS) {
        msFree(class->labels[i]);
      }
    }
  }
  msFree(class->labels);

  msFree(class->keyimage);

  if(class->leader) {
    freeLabelLeader(class->leader);
    msFree(class->leader);
    class->leader = NULL;
  }

  return MS_SUCCESS;
}

/*
** Ensure there is at least one free entry in the sttyles array of this
** classObj. Grow the allocated styles array if necessary and allocate
** a new style for styles[numstyles] if there is not already one,
** setting its contents to all zero bytes (i.e. does not call initStyle()
** on it).
**
** This function is safe to use for the initial allocation of the styles[]
** array as well (i.e. when maxstyles==0 and styles==NULL)
**
** Returns a reference to the new styleObj on success, NULL on error.
*/
styleObj *msGrowClassStyles( classObj *class )
{
  /* Do we need to increase the size of styles[] by  MS_STYLE_ALLOCSIZE?
   */
  if (class->numstyles == class->maxstyles) {
    styleObj **newStylePtr;
    int i, newsize;

    newsize = class->maxstyles + MS_STYLE_ALLOCSIZE;

    /* Alloc/realloc styles */
    newStylePtr = (styleObj**)realloc(class->styles, newsize*sizeof(styleObj*));
    MS_CHECK_ALLOC(newStylePtr, newsize*sizeof(styleObj*), NULL);

    class->styles = newStylePtr;
    class->maxstyles = newsize;
    for(i=class->numstyles; i<class->maxstyles; i++) {
      class->styles[i] = NULL;
    }
  }

  if (class->styles[class->numstyles]==NULL) {
    class->styles[class->numstyles]=(styleObj*)calloc(1,sizeof(styleObj));
    MS_CHECK_ALLOC(class->styles[class->numstyles], sizeof(styleObj), NULL);
  }

  return class->styles[class->numstyles];
}

/* exactly the same as for a classObj */
styleObj *msGrowLabelStyles( labelObj *label )
{
  /* Do we need to increase the size of styles[] by  MS_STYLE_ALLOCSIZE?
   */
  if (label->numstyles == label->maxstyles) {
    styleObj **newStylePtr;
    int i, newsize;

    newsize = label->maxstyles + MS_STYLE_ALLOCSIZE;

    /* Alloc/realloc styles */
    newStylePtr = (styleObj**)realloc(label->styles, newsize*sizeof(styleObj*));
    MS_CHECK_ALLOC(newStylePtr, newsize*sizeof(styleObj*), NULL);

    label->styles = newStylePtr;
    label->maxstyles = newsize;
    for(i=label->numstyles; i<label->maxstyles; i++) {
      label->styles[i] = NULL;
    }
  }

  if (label->styles[label->numstyles]==NULL) {
    label->styles[label->numstyles]=(styleObj*)calloc(1,sizeof(styleObj));
    MS_CHECK_ALLOC(label->styles[label->numstyles], sizeof(styleObj), NULL);
  }

  return label->styles[label->numstyles];
}

/* exactly the same as for a labelLeaderObj, needs refactoring */
styleObj *msGrowLeaderStyles( labelLeaderObj *leader )
{
  /* Do we need to increase the size of styles[] by  MS_STYLE_ALLOCSIZE?
   */
  if (leader->numstyles == leader->maxstyles) {
    styleObj **newStylePtr;
    int i, newsize;

    newsize = leader->maxstyles + MS_STYLE_ALLOCSIZE;

    /* Alloc/realloc styles */
    newStylePtr = (styleObj**)realloc(leader->styles,
                                      newsize*sizeof(styleObj*));
    MS_CHECK_ALLOC(newStylePtr, newsize*sizeof(styleObj*), NULL);

    leader->styles = newStylePtr;
    leader->maxstyles = newsize;
    for(i=leader->numstyles; i<leader->maxstyles; i++) {
      leader->styles[i] = NULL;
    }
  }

  if (leader->styles[leader->numstyles]==NULL) {
    leader->styles[leader->numstyles]=(styleObj*)calloc(1,sizeof(styleObj));
    MS_CHECK_ALLOC(leader->styles[leader->numstyles], sizeof(styleObj), NULL);
  }

  return leader->styles[leader->numstyles];
}

/* msMaybeAllocateClassStyle()
**
** Ensure that requested style index exists and has been initialized.
**
** Returns MS_SUCCESS/MS_FAILURE.
*/
int msMaybeAllocateClassStyle(classObj* c, int idx)
{
  if (c==NULL) return MS_FAILURE;

  if ( idx < 0 ) {
    msSetError(MS_MISCERR, "Invalid style index: %d", "msMaybeAllocateClassStyle()", idx);
    return MS_FAILURE;
  }

  /* Alloc empty styles as needed up to idx.
   * Nothing to do if requested style already exists
   */
  while(c->numstyles <= idx) {
    if (msGrowClassStyles(c) == NULL)
      return MS_FAILURE;

    if ( initStyle(c->styles[c->numstyles]) == MS_FAILURE ) {
      msSetError(MS_MISCERR, "Failed to init new styleObj",
                 "msMaybeAllocateClassStyle()");
      return(MS_FAILURE);
    }
    c->numstyles++;
  }
  return MS_SUCCESS;
}



/*
 * Reset style info in the class to defaults
 * the only members we don't touch are name, expression, and join/query stuff
 * This is used with STYLEITEM before overwriting the contents of a class.
 */
void resetClassStyle(classObj *class)
{
  int i;

  /* reset labels */
  for(i=0; i<class->numlabels; i++) {
    if(class->labels[i] != NULL) {
      if(freeLabel(class->labels[i]) == MS_SUCCESS ) {
        msFree(class->labels[i]);
      }
      class->labels[i] = NULL;
    }
  }
  class->numlabels = 0;

  msFreeExpression(&(class->text));
  msInitExpression(&(class->text));

  /* reset styles */
  for(i=0; i<class->numstyles; i++) {
    if(class->styles[i] != NULL) {
      if( freeStyle(class->styles[i]) == MS_SUCCESS ) {
        msFree(class->styles[i]);
      }
      class->styles[i] = NULL;
    }
  }
  class->numstyles = 0;

  class->layer = NULL;
}

labelObj *msGrowClassLabels( classObj *class )
{

  /* Do we need to increase the size of labels[] by MS_LABEL_ALLOCSIZE?
   */
  if (class->numlabels == class->maxlabels) {
    labelObj **newLabelPtr;
    int i, newsize;

    newsize = class->maxlabels + MS_LABEL_ALLOCSIZE;

    /* Alloc/realloc labels */
    newLabelPtr = (labelObj**)realloc(class->labels, newsize*sizeof(labelObj*));
    MS_CHECK_ALLOC(newLabelPtr, newsize*sizeof(labelObj*), NULL);

    class->labels = newLabelPtr;
    class->maxlabels = newsize;
    for(i=class->numlabels; i<class->maxlabels; i++) {
      class->labels[i] = NULL;
    }
  }

  if (class->labels[class->numlabels]==NULL) {
    class->labels[class->numlabels]=(labelObj*)calloc(1,sizeof(labelObj));
    MS_CHECK_ALLOC(class->labels[class->numlabels], sizeof(labelObj), NULL);
  }

  return class->labels[class->numlabels];
}

int loadClass(classObj *class, layerObj *layer)
{
  int state;
  mapObj *map=NULL;

  class->layer = (layerObj *) layer;
  if(layer && layer->map) map = layer->map;

  for(;;) {
    switch(msyylex()) {
      case(CLASS):
        break; /* for string loads */
      case(DEBUG):
        if((class->debug = getSymbol(3, MS_ON,MS_OFF, MS_NUMBER)) == -1) return(-1);
        if(class->debug == MS_NUMBER) class->debug = (int) msyynumber;
        break;
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadClass()");
        return(-1);
      case(END):
        return(0);
        break;
      case(EXPRESSION):
        if(loadExpression(&(class->expression)) == -1) return(-1); /* loadExpression() cleans up previously allocated expression */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(class->expression.string, msLookupHashTable(&(class->validation), "expression"), msLookupHashTable(&(layer->validation), "expression"), msLookupHashTable(&(map->web.validation), "expression"), NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based EXPRESSION configuration failed pattern validation." , "loadClass()");
            msFreeExpression(&(class->expression));
            return(-1);
          }
        }
        break;
      case(GROUP):
        if(getString(&class->group) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(class->group, msLookupHashTable(&(class->validation), "group"), msLookupHashTable(&(layer->validation), "group"), msLookupHashTable(&(map->web.validation), "group"), NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based GROUP configuration failed pattern validation." , "loadClass()");
            msFree(class->group);
            class->group=NULL;
            return(-1);
          }
        }
        break;
      case(KEYIMAGE):
        if(getString(&class->keyimage) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(class->keyimage, msLookupHashTable(&(class->validation), "keyimage"), msLookupHashTable(&(layer->validation), "keyimage"), msLookupHashTable(&(map->web.validation), "keyimage"), NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based KEYIMAGE configuration failed pattern validation." , "loadClass()");
            msFree(class->keyimage);
            class->keyimage=NULL;
            return(-1);
          }
        }
        break;
      case(LABEL):
        if(msGrowClassLabels(class) == NULL) return(-1);
        initLabel(class->labels[class->numlabels]);
        class->labels[class->numlabels]->size = MS_MEDIUM; /* only set a default if the LABEL section is present */
        if(loadLabel(class->labels[class->numlabels]) == -1) {
          msFree(class->labels[class->numlabels]);
          return(-1);
        }
        class->numlabels++;
        break;
      case(LEADER):
        if(!class->leader) {
          class->leader = msSmallMalloc(sizeof(labelLeaderObj));
          initLeader(class->leader);
        }
        if(loadLeader(class->leader) == -1) return(-1);
        break;
      case(MAXSCALE):
      case(MAXSCALEDENOM):
        if(getDouble(&(class->maxscaledenom)) == -1) return(-1);
        break;
      case(METADATA):
        if(loadHashTable(&(class->metadata)) != MS_SUCCESS) return(-1);
        break;
      case(MINSCALE):
      case(MINSCALEDENOM):
        if(getDouble(&(class->minscaledenom)) == -1) return(-1);
        break;
      case(MINFEATURESIZE):
        if(getInteger(&(class->minfeaturesize)) == -1) return(-1);
        break;
      case(NAME):
        if(getString(&class->name) == MS_FAILURE) return(-1);
        break;
      case(STATUS):
        if((class->status = getSymbol(2, MS_ON,MS_OFF)) == -1) return(-1);
        break;
      case(STYLE):
        if(msGrowClassStyles(class) == NULL)
          return(-1);
        initStyle(class->styles[class->numstyles]);
        if(loadStyle(class->styles[class->numstyles]) != MS_SUCCESS) return(-1);
        class->numstyles++;
        break;
      case(TEMPLATE):
        if(getString(&class->template) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(class->template, msLookupHashTable(&(class->validation), "template"), msLookupHashTable(&(layer->validation), "template"), msLookupHashTable(&(map->web.validation), "template"), map->templatepattern) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based TEMPLATE configuration failed pattern validation." , "loadClass()");
            msFree(class->template);
            class->template=NULL;
            return(-1);
          }
        }
        break;
      case(TEXT):
        if(loadExpression(&(class->text)) == -1) return(-1); /* loadExpression() cleans up previously allocated expression */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(class->text.string, msLookupHashTable(&(class->validation), "text"), msLookupHashTable(&(layer->validation), "text"), msLookupHashTable(&(map->web.validation), "text"), NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based TEXT configuration failed pattern validation." , "loadClass()");
            msFreeExpression(&(class->text));
            return(-1);
          }
        }
        if((class->text.type != MS_STRING) && (class->text.type != MS_EXPRESSION)) {
          msSetError(MS_MISCERR, "Text expressions support constant or tagged replacement strings." , "loadClass()");
          return(-1);
        }
        break;
      case(TITLE):
        if(getString(&class->title) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(class->title, msLookupHashTable(&(class->validation), "title"), msLookupHashTable(&(layer->validation), "title"), msLookupHashTable(&(map->web.validation), "title"), NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based TITLE configuration failed pattern validation." , "loadClass()");
            msFree(class->title);
            class->title=NULL;
            return(-1);
          }
        }
        break;

        /*
        ** for backwards compatability, these are shortcuts for style 0
        */
      case(BACKGROUNDCOLOR):
        if (msMaybeAllocateClassStyle(class, 0)) return MS_FAILURE;
        if(loadColor(&(class->styles[0]->backgroundcolor), NULL) != MS_SUCCESS) return(-1);
        break;
      case(COLOR):
        if (msMaybeAllocateClassStyle(class, 0)) return MS_FAILURE;
        if(loadColor(&(class->styles[0]->color), NULL) != MS_SUCCESS) return(-1);
        class->numstyles = 1; /* must *always* set a color or outlinecolor */
        break;
      case(MAXSIZE):
        if (msMaybeAllocateClassStyle(class, 0)) return MS_FAILURE;
        if(getDouble(&(class->styles[0]->maxsize)) == -1) return(-1);
        break;
      case(MINSIZE):
        if (msMaybeAllocateClassStyle(class, 0)) return MS_FAILURE;
        if(getDouble(&(class->styles[0]->minsize)) == -1) return(-1);
        break;
      case(OUTLINECOLOR):
        if (msMaybeAllocateClassStyle(class, 0)) return MS_FAILURE;
        if(loadColor(&(class->styles[0]->outlinecolor), NULL) != MS_SUCCESS) return(-1);
        class->numstyles = 1; /* must *always* set a color, symbol or outlinecolor */
        break;
      case(SIZE):
        if (msMaybeAllocateClassStyle(class, 0)) return MS_FAILURE;
        if(getDouble(&(class->styles[0]->size)) == -1) return(-1);
        break;
      case(SYMBOL):
        if (msMaybeAllocateClassStyle(class, 0)) return MS_FAILURE;
        if((state = getSymbol(2, MS_NUMBER,MS_STRING)) == -1) return(-1);
        if(state == MS_NUMBER)
          class->styles[0]->symbol = (int) msyynumber;
        else {
          if (class->styles[0]->symbolname != NULL)
            msFree(class->styles[0]->symbolname);
          class->styles[0]->symbolname = msStrdup(msyystring_buffer);
          class->numstyles = 1;
        }
        break;

        /*
        ** for backwards compatability, these are shortcuts for style 1
        */
      case(OVERLAYBACKGROUNDCOLOR):
        if (msMaybeAllocateClassStyle(class, 1)) return MS_FAILURE;
        if(loadColor(&(class->styles[1]->backgroundcolor), NULL) != MS_SUCCESS) return(-1);
        break;
      case(OVERLAYCOLOR):
        if (msMaybeAllocateClassStyle(class, 1)) return MS_FAILURE;
        if(loadColor(&(class->styles[1]->color), NULL) != MS_SUCCESS) return(-1);
        class->numstyles = 2; /* must *always* set a color, symbol or outlinecolor */
        break;
      case(OVERLAYMAXSIZE):
        if (msMaybeAllocateClassStyle(class, 1)) return MS_FAILURE;
        if(getDouble(&(class->styles[1]->maxsize)) == -1) return(-1);
        break;
      case(OVERLAYMINSIZE):
        if (msMaybeAllocateClassStyle(class, 1)) return MS_FAILURE;
        if(getDouble(&(class->styles[1]->minsize)) == -1) return(-1);
        break;
      case(OVERLAYOUTLINECOLOR):
        if (msMaybeAllocateClassStyle(class, 1)) return MS_FAILURE;
        if(loadColor(&(class->styles[1]->outlinecolor), NULL) != MS_SUCCESS) return(-1);
        class->numstyles = 2; /* must *always* set a color, symbol or outlinecolor */
        break;
      case(OVERLAYSIZE):
        if (msMaybeAllocateClassStyle(class, 1)) return MS_FAILURE;
        if(getDouble(&(class->styles[1]->size)) == -1) return(-1);
        break;
      case(OVERLAYSYMBOL):
        if (msMaybeAllocateClassStyle(class, 1)) return MS_FAILURE;
        if((state = getSymbol(2, MS_NUMBER,MS_STRING)) == -1) return(-1);
        if(state == MS_NUMBER)
          class->styles[1]->symbol = (int) msyynumber;
        else  {
          if (class->styles[1]->symbolname != NULL)
            msFree(class->styles[1]->symbolname);
          class->styles[1]->symbolname = msStrdup(msyystring_buffer);
        }
        class->numstyles = 2;
        break;

      case(VALIDATION):
        if(loadHashTable(&(class->validation)) != MS_SUCCESS) return(-1);
        break;
      default:
        if(strlen(msyystring_buffer) > 0) {
          msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadClass()", msyystring_buffer, msyylineno);
          return(-1);
        } else {
          return(0); /* end of a string, not an error */
        }
    }
  }
}

static int classResolveSymbolNames(classObj *class)
{
  int i,j;

  /* step through styles and labels to resolve symbol names */
  /* class styles */
  for(i=0; i<class->numstyles; i++) {
    if(class->styles[i]->symbolname) {
      if((class->styles[i]->symbol =  msGetSymbolIndex(&(class->layer->map->symbolset), class->styles[i]->symbolname, MS_TRUE)) == -1) {
        msSetError(MS_MISCERR, "Undefined symbol \"%s\" in class, style %d of layer %s.", "classResolveSymbolNames()", class->styles[i]->symbolname, i, class->layer->name);
        return MS_FAILURE;
      }
    }
  }

  /* label styles */
  for(i=0; i<class->numlabels; i++) {
    for(j=0; j<class->labels[i]->numstyles; j++) {
      if(class->labels[i]->styles[j]->symbolname) {
        if((class->labels[i]->styles[j]->symbol =  msGetSymbolIndex(&(class->layer->map->symbolset), class->labels[i]->styles[j]->symbolname, MS_TRUE)) == -1) {
          msSetError(MS_MISCERR, "Undefined symbol \"%s\" in class, label style %d of layer %s.", "classResolveSymbolNames()", class->labels[i]->styles[j]->symbolname, j, class->layer->name);
          return MS_FAILURE;
        }
      }
    }
  }

  return MS_SUCCESS;
}

int msUpdateClassFromString(classObj *class, char *string, int url_string)
{
  if(!class || !string) return MS_FAILURE;

  msAcquireLock( TLOCK_PARSER );

  if(url_string)
    msyystate = MS_TOKENIZE_URL_STRING;
  else
    msyystate = MS_TOKENIZE_STRING;
  msyystring = string;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyylineno = 1; /* start at line 1 */

  if(loadClass(class, class->layer) == -1) {
    msReleaseLock( TLOCK_PARSER );
    return MS_FAILURE; /* parse error */;
  }
  msReleaseLock( TLOCK_PARSER );

  msyylex_destroy();

  if(classResolveSymbolNames(class) != MS_SUCCESS) return MS_FAILURE;

  return MS_SUCCESS;
}

static void writeClass(FILE *stream, int indent, classObj *class)
{
  int i;

  if(class->status == MS_DELETE) return;

  indent++;
  writeBlockBegin(stream, indent, "CLASS");
  writeString(stream, indent, "NAME", NULL, class->name);
  writeString(stream, indent, "GROUP", NULL, class->group);
  writeNumber(stream, indent, "DEBUG", 0, class->debug);
  writeExpression(stream, indent, "EXPRESSION", &(class->expression));
  writeString(stream, indent, "KEYIMAGE", NULL, class->keyimage);
  for(i=0; i<class->numlabels; i++) writeLabel(stream, indent, class->labels[i]);
  if(class->leader)
    writeLeader(stream,indent,class->leader);
  writeNumber(stream, indent, "MAXSCALEDENOM", -1, class->maxscaledenom);
  writeHashTable(stream, indent, "METADATA", &(class->metadata));
  writeNumber(stream, indent, "MINSCALEDENOM", -1, class->minscaledenom);
  writeNumber(stream, indent, "MINFEATURESIZE", -1, class->minfeaturesize);
  writeKeyword(stream, indent, "STATUS", class->status, 1, MS_OFF, "OFF");
  for(i=0; i<class->numstyles; i++) writeStyle(stream, indent, class->styles[i]);
  writeString(stream, indent, "TEMPLATE", NULL, class->template);
  writeExpression(stream, indent, "TEXT", &(class->text));
  writeString(stream, indent, "TITLE", NULL, class->title);
  writeHashTable(stream, indent, "VALIDATION", &(class->validation));
  writeBlockEnd(stream, indent, "CLASS");
}

char* msWriteClassToString(classObj *class)
{
  msIOContext  context;
  msIOBuffer buffer;

  context.label = NULL;
  context.write_channel = MS_TRUE;
  context.readWriteFunc = msIO_bufferWrite;
  context.cbData = &buffer;
  buffer.data = NULL;
  buffer.data_len = 0;
  buffer.data_offset = 0;

  msIO_installHandlers( NULL, &context, NULL );

  writeClass(stdout, -1, class);
  msIO_bufferWrite( &buffer, "", 1 );

  msIO_installHandlers( NULL, NULL, NULL );

  return (char*)buffer.data;
}

int initCompositingFilter(CompositingFilter *filter) {
  filter->filter = NULL;
  filter->next = NULL;
  return MS_SUCCESS;
}

void freeCompositingFilter(CompositingFilter *filter) {
  if(!filter) return;
  if(filter->next)
    freeCompositingFilter(filter->next);
  free(filter->filter);
  free(filter);
}

int initLayerCompositer(LayerCompositer *compositer) {
  compositer->comp_op = MS_COMPOP_SRC_OVER;
  compositer->opacity = 100;
  compositer->next = NULL;
  compositer->filter = NULL;
  return MS_SUCCESS;
}

void freeLayerCompositer(LayerCompositer *compositer) {
  if(!compositer) return;
  if(compositer->next)
    freeLayerCompositer(compositer->next);
  freeCompositingFilter(compositer->filter);
  free(compositer);
}

/*
** Initialize, load and free a single layer structure
*/
int initLayer(layerObj *layer, mapObj *map)
{
  if (layer==NULL) {
    msSetError(MS_MEMERR, "Layer is null", "initLayer()");
    return(-1);
  }
  layer->debug = (int)msGetGlobalDebugLevel();
  MS_REFCNT_INIT(layer);

  /* Set maxclasses = 0, class[] will be allocated as needed on first call
   * to msGrowLayerClasses()
   */
  layer->numclasses = 0;
  layer->maxclasses = 0;
  layer->class = NULL;

  layer->name = NULL;
  layer->group = NULL;
  layer->status = MS_OFF;
  layer->data = NULL;

  layer->map = map; /* point back to the encompassing structure */

  layer->type = -1;

  layer->toleranceunits = MS_PIXELS;
  layer->tolerance = -1; /* perhaps this should have a different value based on type */

  layer->symbolscaledenom = -1.0; /* -1 means nothing is set */
  layer->scalefactor = 1.0;
  layer->maxscaledenom = -1.0;
  layer->minscaledenom = -1.0;
  layer->minfeaturesize = -1; /* no limit */
  layer->maxgeowidth = -1.0;
  layer->mingeowidth = -1.0;

  layer->sizeunits = MS_PIXELS;

  layer->maxfeatures = -1; /* no quota */
  layer->startindex = -1; /*used for pagination*/

  layer->scaletokens = NULL;
  layer->numscaletokens = 0;

  layer->template = layer->header = layer->footer = NULL;

  layer->transform = MS_TRUE;

  layer->classitem = NULL;
  layer->classitemindex = -1;

  layer->units = MS_METERS;
  if(msInitProjection(&(layer->projection)) == -1) return(-1);
  layer->project = MS_TRUE;

  initCluster(&layer->cluster);

  MS_INIT_COLOR(layer->offsite, -1,-1,-1, 255);

  layer->labelcache = MS_ON;
  layer->postlabelcache = MS_FALSE;

  layer->labelitem = NULL;
  layer->labelitemindex = -1;

  layer->labelmaxscaledenom = -1;
  layer->labelminscaledenom = -1;

  layer->tileitem = msStrdup("location");
  layer->tileitemindex = -1;
  layer->tileindex = NULL;
  layer->tilesrs = NULL;

  layer->bandsitem = NULL;
  layer->bandsitemindex = -1;

  layer->currentfeature = layer->features = NULL;

  layer->connection = NULL;
  layer->plugin_library = NULL;
  layer->plugin_library_original = NULL;
  layer->connectiontype = MS_SHAPEFILE;
  layer->vtable = NULL;
  layer->classgroup = NULL;

  layer->layerinfo = NULL;
  layer->wfslayerinfo = NULL;

  layer->items = NULL;
  layer->iteminfo = NULL;
  layer->numitems = 0;

  layer->resultcache= NULL;

  msInitExpression(&(layer->filter));
  layer->filteritem = NULL;
  layer->filteritemindex = -1;

  layer->requires = layer->labelrequires = NULL;

  initHashTable(&(layer->metadata));
  initHashTable(&(layer->bindvals));
  initHashTable(&(layer->validation));

  layer->dump = MS_FALSE;

  layer->styleitem = NULL;
  layer->styleitemindex = -1;

  layer->numprocessing = 0;
  layer->processing = NULL;
  layer->numjoins = 0;
  layer->joins = (joinObj *) malloc(MS_MAXJOINS*sizeof(joinObj));
  MS_CHECK_ALLOC(layer->joins, MS_MAXJOINS*sizeof(joinObj), -1);

  layer->extent.minx = -1.0;
  layer->extent.miny = -1.0;
  layer->extent.maxx = -1.0;
  layer->extent.maxy = -1.0;

  layer->mask = NULL;
  layer->maskimage = NULL;
  layer->grid = NULL;

  msInitExpression(&(layer->_geomtransform));
  layer->_geomtransform.type = MS_GEOMTRANSFORM_NONE;

  msInitExpression(&(layer->utfdata));
  layer->utfitem = NULL;
  layer->utfitemindex = -1;
  
  layer->encoding = NULL;
  
  layer->sortBy.nProperties = 0;
  layer->sortBy.properties = NULL;
  layer->orig_st = NULL;

  layer->compositer = NULL;

  return(0);
}

int initScaleToken(scaleTokenObj* token) {
  token->n_entries = 0;
  token->name = NULL;
  token->tokens = NULL;
  return MS_SUCCESS;
}

int freeScaleTokenEntry( scaleTokenEntryObj *token) {
  msFree(token->value);
  return MS_SUCCESS;
}

int freeScaleToken(scaleTokenObj *scaletoken) {
  int i;
  msFree(scaletoken->name);
  for(i=0;i<scaletoken->n_entries;i++) {
    freeScaleTokenEntry(&scaletoken->tokens[i]);
  }
  msFree(scaletoken->tokens);
  return MS_SUCCESS;
}

int freeLayer(layerObj *layer)
{
  int i;
  if (!layer) return MS_FAILURE;
  if( MS_REFCNT_DECR_IS_NOT_ZERO(layer) ) {
    return MS_FAILURE;
  }

  if (layer->debug >= MS_DEBUGLEVEL_VVV)
    msDebug("freeLayer(): freeing layer at %p.\n",layer);

  if(msLayerIsOpen(layer))
    msLayerClose(layer);

  msFree(layer->name);
  msFree(layer->encoding);
  msFree(layer->group);
  msFree(layer->data);
  msFree(layer->classitem);
  msFree(layer->labelitem);
  msFree(layer->header);
  msFree(layer->footer);
  msFree(layer->template);
  msFree(layer->tileindex);
  msFree(layer->tileitem);
  msFree(layer->tilesrs);
  msFree(layer->bandsitem);
  msFree(layer->plugin_library);
  msFree(layer->plugin_library_original);
  msFree(layer->connection);
  msFree(layer->vtable);
  msFree(layer->classgroup);

  msFreeProjection(&(layer->projection));
  msFreeExpression(&layer->_geomtransform);
  
  freeCluster(&layer->cluster);

  for(i=0; i<layer->maxclasses; i++) {
    if (layer->class[i] != NULL) {
      layer->class[i]->layer=NULL;
      if ( freeClass(layer->class[i]) == MS_SUCCESS ) {
        msFree(layer->class[i]);
      }
    }
  }
  msFree(layer->class);

  if(layer->numscaletokens>0) {
    for(i=0;i<layer->numscaletokens;i++) {
      freeScaleToken(&layer->scaletokens[i]);
    }
    msFree(layer->scaletokens);
  }

  if(layer->features)
    freeFeatureList(layer->features);

  if(layer->resultcache) {
    cleanupResultCache(layer->resultcache);
    msFree(layer->resultcache);
  }

  msFree(layer->styleitem);

  msFree(layer->filteritem);
  msFreeExpression(&(layer->filter));

  msFree(layer->requires);
  msFree(layer->labelrequires);

  if(&(layer->metadata)) msFreeHashItems(&(layer->metadata));
  if(&(layer->validation)) msFreeHashItems(&(layer->validation));
  if(&(layer->bindvals))  msFreeHashItems(&layer->bindvals);

  if(layer->numprocessing > 0)
    msFreeCharArray(layer->processing, layer->numprocessing);

  for(i=0; i<layer->numjoins; i++) /* each join */
    freeJoin(&(layer->joins[i]));
  msFree(layer->joins);
  layer->numjoins = 0;

  layer->classgroup = NULL;

  msFree(layer->mask);
  if(layer->maskimage) {
    msFreeImage(layer->maskimage);
  }
  
  if(layer->compositer) {
    freeLayerCompositer(layer->compositer);    
  }

  if (layer->grid) {
    freeGrid(layer->grid);
    msFree(layer->grid);
  }

  msFreeExpression(&(layer->utfdata));
  msFree(layer->utfitem);
  
  for(i=0;i<layer->sortBy.nProperties;i++)
      msFree(layer->sortBy.properties[i].item);
  msFree(layer->sortBy.properties);

  return MS_SUCCESS;
}

/*
** Ensure there is at least one free entry in the class array of this
** layerObj. Grow the allocated class array if necessary and allocate
** a new class for class[numclasses] if there is not already one,
** setting its contents to all zero bytes (i.e. does not call initClass()
** on it).
**
** This function is safe to use for the initial allocation of the class[]
** array as well (i.e. when maxclasses==0 and class==NULL)
**
** Returns a reference to the new classObj on success, NULL on error.
*/
classObj *msGrowLayerClasses( layerObj *layer )
{
  /* Do we need to increase the size of class[] by  MS_CLASS_ALLOCSIZE?
   */
  if (layer->numclasses == layer->maxclasses) {
    classObj **newClassPtr;
    int i, newsize;

    newsize = layer->maxclasses + MS_CLASS_ALLOCSIZE;

    /* Alloc/realloc classes */
    newClassPtr = (classObj**)realloc(layer->class,
                                      newsize*sizeof(classObj*));
    MS_CHECK_ALLOC(newClassPtr, newsize*sizeof(classObj*), NULL);

    layer->class = newClassPtr;
    layer->maxclasses = newsize;
    for(i=layer->numclasses; i<layer->maxclasses; i++) {
      layer->class[i] = NULL;
    }
  }

  if (layer->class[layer->numclasses]==NULL) {
    layer->class[layer->numclasses]=(classObj*)calloc(1,sizeof(classObj));
    MS_CHECK_ALLOC(layer->class[layer->numclasses], sizeof(classObj), NULL);
  }

  return layer->class[layer->numclasses];
}

scaleTokenObj *msGrowLayerScaletokens( layerObj *layer )
{
  layer->scaletokens = msSmallRealloc(layer->scaletokens,(layer->numscaletokens+1)*sizeof(scaleTokenObj));
  memset(&layer->scaletokens[layer->numscaletokens],0,sizeof(scaleTokenObj));
  return &layer->scaletokens[layer->numscaletokens];
}

int loadScaletoken(scaleTokenObj *token, layerObj *layer) {
  for(;;) {
    int stop = 0;
    switch(msyylex()) {
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadScaletoken()");
        return(MS_FAILURE);
      case(NAME):
        if(getString(&token->name) == MS_FAILURE) return(MS_FAILURE);
        break;
      case(VALUES):
         for(;;) {
           if(stop) break;
           switch(msyylex()) {
             case(EOF):
               msSetError(MS_EOFERR, NULL, "loadScaletoken()");
               return(MS_FAILURE);
             case(END): 
               stop = 1;
               if(token->n_entries == 0) {
                 msSetError(MS_PARSEERR,"Scaletoken (line:%d) has no VALUES defined","loadScaleToken()",msyylineno);
                 return(MS_FAILURE);
               }
               token->tokens[token->n_entries-1].maxscale = DBL_MAX;
               break;
             case(MS_STRING):
               /* we have a key */
               token->tokens = msSmallRealloc(token->tokens,(token->n_entries+1)*sizeof(scaleTokenEntryObj));
               
               if(1 != sscanf(msyystring_buffer,"%lf",&token->tokens[token->n_entries].minscale)) {
                 msSetError(MS_PARSEERR, "failed to parse SCALETOKEN VALUE (%s):(line %d), expecting \"minscale\"", "loadScaletoken()",
                         msyystring_buffer,msyylineno);
                 return(MS_FAILURE);
               }
               if(token->n_entries == 0) {
                 /* check supplied value was 0*/
                 if(token->tokens[0].minscale != 0) {
                  msSetError(MS_PARSEERR, "First SCALETOKEN VALUE (%s):(line %d) must be zero, expecting \"0\"", "loadScaletoken()",
                         msyystring_buffer,msyylineno);
                  return(MS_FAILURE);
                 }
               } else {
                 /* set max scale of previous token */
                 token->tokens[token->n_entries-1].maxscale = token->tokens[token->n_entries].minscale;
               }
               token->tokens[token->n_entries].value = NULL;
               if(getString(&(token->tokens[token->n_entries].value)) == MS_FAILURE) return(MS_FAILURE);
               token->n_entries++;
               break;
             default:
               msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadScaletoken()",  msyystring_buffer, msyylineno );
               return(MS_FAILURE);
           }
         }
         break;
      case(END):
        if(!token->name || !*(token->name)) {
          msSetError(MS_PARSEERR,"ScaleToken missing mandatory NAME entry (line %d)","loadScaleToken()",msyylineno);
          return MS_FAILURE;
        }
        if(token->n_entries == 0) {
          msSetError(MS_PARSEERR,"ScaleToken missing at least one VALUES entry (line %d)","loadScaleToken()",msyylineno);
          return MS_FAILURE;
        }
        return MS_SUCCESS;
      default:
        msSetError(MS_IDENTERR, "Parsing error 2 near (%s):(line %d)", "loadScaletoken()",  msyystring_buffer, msyylineno );
        return(MS_FAILURE);
    }
  } /* next token*/
}

int loadLayerCompositer(LayerCompositer *compositer) {
  for(;;) {
    switch(msyylex()) {
      case COMPFILTER: {
        CompositingFilter **filter = &compositer->filter;
        while(*filter) {
          filter = &((*filter)->next);
        }
        *filter = msSmallMalloc(sizeof(CompositingFilter));
        initCompositingFilter(*filter);
        if(getString(&((*filter)->filter)) == MS_FAILURE) return(MS_FAILURE);
      }
        break;
      case COMPOP: {
        char *compop=NULL;
        if(getString(&compop) == MS_FAILURE) return(MS_FAILURE);
        else if(!strcmp(compop,"clear"))
          compositer->comp_op = MS_COMPOP_CLEAR;
        else if(!strcmp(compop,"color-burn"))
          compositer->comp_op = MS_COMPOP_COLOR_BURN;
        else if(!strcmp(compop,"color-dodge"))
          compositer->comp_op = MS_COMPOP_COLOR_DODGE;
        else if(!strcmp(compop,"contrast"))
          compositer->comp_op = MS_COMPOP_CONTRAST;
        else if(!strcmp(compop,"darken"))
          compositer->comp_op = MS_COMPOP_DARKEN;
        else if(!strcmp(compop,"difference"))
          compositer->comp_op = MS_COMPOP_DIFFERENCE;
        else if(!strcmp(compop,"dst"))
          compositer->comp_op = MS_COMPOP_DST;
        else if(!strcmp(compop,"dst-atop"))
          compositer->comp_op = MS_COMPOP_DST_ATOP;
        else if(!strcmp(compop,"dst-in"))
          compositer->comp_op = MS_COMPOP_DST_IN;
        else if(!strcmp(compop,"dst-out"))
          compositer->comp_op = MS_COMPOP_DST_OUT;
        else if(!strcmp(compop,"dst-over"))
          compositer->comp_op = MS_COMPOP_DST_OVER;
        else if(!strcmp(compop,"exclusion"))
          compositer->comp_op = MS_COMPOP_EXCLUSION;
        else if(!strcmp(compop,"hard-light"))
          compositer->comp_op = MS_COMPOP_HARD_LIGHT;
        else if(!strcmp(compop,"invert"))
          compositer->comp_op = MS_COMPOP_INVERT;
        else if(!strcmp(compop,"invert-rgb"))
          compositer->comp_op = MS_COMPOP_INVERT_RGB;
        else if(!strcmp(compop,"lighten"))
          compositer->comp_op = MS_COMPOP_LIGHTEN;
        else if(!strcmp(compop,"minus"))
          compositer->comp_op = MS_COMPOP_MINUS;
        else if(!strcmp(compop,"multiply"))
          compositer->comp_op = MS_COMPOP_MULTIPLY;
        else if(!strcmp(compop,"overlay"))
          compositer->comp_op = MS_COMPOP_OVERLAY;
        else if(!strcmp(compop,"plus"))
          compositer->comp_op = MS_COMPOP_PLUS;
        else if(!strcmp(compop,"screen"))
          compositer->comp_op = MS_COMPOP_SCREEN;
        else if(!strcmp(compop,"soft-light"))
          compositer->comp_op = MS_COMPOP_SOFT_LIGHT;
        else if(!strcmp(compop,"src"))
          compositer->comp_op = MS_COMPOP_SRC;
        else if(!strcmp(compop,"src-atop"))
          compositer->comp_op = MS_COMPOP_SRC_ATOP;
        else if(!strcmp(compop,"src-in"))
          compositer->comp_op = MS_COMPOP_SRC_IN;
        else if(!strcmp(compop,"src-out"))
          compositer->comp_op = MS_COMPOP_SRC_OUT;
        else if(!strcmp(compop,"src-over"))
          compositer->comp_op = MS_COMPOP_SRC_OVER;
        else if(!strcmp(compop,"xor"))
          compositer->comp_op = MS_COMPOP_XOR;
        else {
          msSetError(MS_PARSEERR,"Unknown COMPOP \"%s\"", "loadLayerCompositer()", compop);
          free(compop);
          if (compositer->filter) {
            msFree(compositer->filter->filter);
            msFree(compositer->filter);
            compositer->filter=NULL;
            }
          return MS_FAILURE;
        }
        free(compop);
      }
        break;
      case END:
        return MS_SUCCESS;
      case OPACITY:
        if (getInteger(&(compositer->opacity)) == -1) {
          if (compositer->filter) {
            msFree(compositer->filter->filter);
            msFree(compositer->filter);
            compositer->filter=NULL;
            }
          return MS_FAILURE;
          }
        if(compositer->opacity<0 || compositer->opacity>100) {
          if (compositer->filter) {
            msFree(compositer->filter->filter);
            msFree(compositer->filter);
            compositer->filter=NULL;
            }
          msSetError(MS_PARSEERR,"OPACITY must be between 0 and 100 (line %d)","loadLayerCompositer()",msyylineno);
          return MS_FAILURE;
        }
        break;
      default:
        if (compositer->filter) {
          msFree(compositer->filter->filter);
          msFree(compositer->filter);
          compositer->filter=NULL;
          }
        msSetError(MS_IDENTERR, "Parsing error 2 near (%s):(line %d)", "loadLayerCompositer()",  msyystring_buffer, msyylineno );
        return(MS_FAILURE);
    }
  }
}
int loadLayer(layerObj *layer, mapObj *map)
{
  int type;

  layer->map = (mapObj *)map;

  for(;;) {
    switch(msyylex()) {
      case(BINDVALS):
        if(loadHashTable(&(layer->bindvals)) != MS_SUCCESS) return(-1);
        break;
      case(CLASS):
        if (msGrowLayerClasses(layer) == NULL)
          return(-1);
        initClass(layer->class[layer->numclasses]);
        if(loadClass(layer->class[layer->numclasses], layer) == -1) return(-1);
        layer->numclasses++;
        break;
      case(CLUSTER):
        initCluster(&layer->cluster);
        if(loadCluster(&layer->cluster) == -1) return(-1);
        break;
      case(CLASSGROUP):
        if(getString(&layer->classgroup) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->classgroup, msLookupHashTable(&(layer->validation), "classgroup"), msLookupHashTable(&(map->web.validation), "classgroup"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based CLASSGROUP configuration failed pattern validation." , "loadLayer()");
            msFree(layer->classgroup);
            layer->classgroup=NULL;
            return(-1);
          }
        }
        break;
      case(CLASSITEM):
        if(getString(&layer->classitem) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->classitem, msLookupHashTable(&(layer->validation), "classitem"), msLookupHashTable(&(map->web.validation), "classitem"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based CLASSITEM configuration failed pattern validation." , "loadLayer()");
            msFree(layer->classitem);
            layer->classitem=NULL;
            return(-1);
          }
        }
        break;
      case(COMPOSITE): {
        LayerCompositer *compositer = msSmallMalloc(sizeof(LayerCompositer));
        initLayerCompositer(compositer);
        if(MS_FAILURE == loadLayerCompositer(compositer)) {
          msFree(compositer);
          return -1;
          }
        if(!layer->compositer) {
          layer->compositer = compositer;
        } else {
          LayerCompositer *lctmp = layer->compositer;
          while(lctmp->next) lctmp = lctmp->next;
          lctmp->next = compositer;
        }
        break;
      }
      case(CONNECTION):
        if(getString(&layer->connection) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->connection, msLookupHashTable(&(layer->validation), "connection"), msLookupHashTable(&(map->web.validation), "connection"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based CONNECTION configuration failed pattern validation." , "loadLayer()");
            msFree(layer->connection);
            layer->connection=NULL;
            return(-1);
          }
        }
        break;
      case(CONNECTIONTYPE):
        if((type = getSymbol(11, MS_OGR, MS_POSTGIS, MS_WMS, MS_ORACLESPATIAL, MS_WFS, MS_GRATICULE, MS_PLUGIN, MS_UNION, MS_UVRASTER, MS_CONTOUR, MS_KERNELDENSITY)) == -1) return(-1);
        layer->connectiontype = type;
        break;
      case(DATA):
        if(getString(&layer->data) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->data, msLookupHashTable(&(layer->validation), "data"), msLookupHashTable(&(map->web.validation), "data"), map->datapattern, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based DATA configuration failed pattern validation." , "loadLayer()");
            msFree(layer->data);
            layer->data=NULL;
            return(-1);
          }
        }
        break;
      case(DEBUG):
        if((layer->debug = getSymbol(3, MS_ON,MS_OFF, MS_NUMBER)) == -1) return(-1);
        if(layer->debug == MS_NUMBER) layer->debug = (int) msyynumber;
        break;
      case(DUMP):
        if((layer->dump = getSymbol(2, MS_TRUE,MS_FALSE)) == -1) return(-1);
        break;
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadLayer()");
        return(-1);
        break;
      case(ENCODING):
        if(getString(&layer->encoding) == MS_FAILURE) return(-1);
        break;
      case(END):
        if(layer->type == -1) {
          msSetError(MS_MISCERR, "Layer type not set.", "loadLayer()");
          return(-1);
        }

        return(0);
        break;
      case(EXTENT): {
        if(getDouble(&(layer->extent.minx)) == -1) return(-1);
        if(getDouble(&(layer->extent.miny)) == -1) return(-1);
        if(getDouble(&(layer->extent.maxx)) == -1) return(-1);
        if(getDouble(&(layer->extent.maxy)) == -1) return(-1);
        if (!MS_VALID_EXTENT(layer->extent)) {
          msSetError(MS_MISCERR, "Given layer extent is invalid. Check that it is in the form: minx, miny, maxx, maxy", "loadLayer()");
          return(-1);
        }
        break;
      }
      case(FEATURE):
        if(layer->type == -1) {
          msSetError(MS_MISCERR, "Layer type must be set before defining inline features.", "loadLayer()");
          return(-1);
        }

        if(layer->type == MS_LAYER_POLYGON)
          type = MS_SHAPE_POLYGON;
        else if(layer->type == MS_LAYER_LINE)
          type = MS_SHAPE_LINE;
        else
          type = MS_SHAPE_POINT;

        layer->connectiontype = MS_INLINE;

        if(loadFeature(layer, type) == MS_FAILURE) return(-1);
        break;
      case(FILTER):
        if(loadExpression(&(layer->filter)) == -1) return(-1); /* loadExpression() cleans up previously allocated expression */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->filter.string, msLookupHashTable(&(layer->validation), "filter"), msLookupHashTable(&(map->web.validation), "filter"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based FILTER configuration failed pattern validation." , "loadLayer()");
            msFreeExpression(&(layer->filter));
            return(-1);
          }
        }
        break;
      case(FILTERITEM):
        if(getString(&layer->filteritem) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->filteritem, msLookupHashTable(&(layer->validation), "filteritem"), msLookupHashTable(&(map->web.validation), "filteritem"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based FILTERITEM configuration failed pattern validation." , "loadLayer()");
            msFree(layer->filteritem);
            layer->filteritem=NULL;
            return(-1);
          }
        }
        break;
      case(FOOTER):
        if(getString(&layer->footer) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->footer, msLookupHashTable(&(layer->validation), "footer"), msLookupHashTable(&(map->web.validation), "footer"), map->templatepattern, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based FOOTER configuration failed pattern validation." , "loadLayer()");
            msFree(layer->footer);
            layer->footer=NULL;
            return(-1);
          }
        }
        break;
      case(GRID):
        layer->connectiontype = MS_GRATICULE;
        if (layer->grid) {
          freeGrid(layer->grid);
          msFree(layer->grid);
        }
        layer->grid = (void *) malloc(sizeof(graticuleObj));
        MS_CHECK_ALLOC(layer->grid, sizeof(graticuleObj), -1);

        initGrid(layer->grid);
        loadGrid(layer);
        break;
      case(GROUP):
        if(getString(&layer->group) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->group, msLookupHashTable(&(layer->validation), "group"), msLookupHashTable(&(map->web.validation), "group"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based GROUP configuration failed pattern validation." , "loadLayer()");
            msFree(layer->group);
            layer->group=NULL;
            return(-1);
          }
        }
        break;
      case(GEOMTRANSFORM): {
        int s;
        if((s = getSymbol(1, MS_EXPRESSION)) == -1) return(MS_FAILURE);
        /* handle expression case here for the moment */
        msFree(layer->_geomtransform.string);
        layer->_geomtransform.string = msStrdup(msyystring_buffer);
        layer->_geomtransform.type = MS_GEOMTRANSFORM_EXPRESSION;
      }
      break;
      case(HEADER):
        if(getString(&layer->header) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->header, msLookupHashTable(&(layer->validation), "header"), msLookupHashTable(&(map->web.validation), "header"), map->templatepattern, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based HEADER configuration failed pattern validation." , "loadLayer()");
            msFree(layer->header);
            layer->header=NULL;
            return(-1);
          }
        }
        break;
      case(JOIN):
        if(layer->numjoins == MS_MAXJOINS) { /* no room */
          msSetError(MS_IDENTERR, "Maximum number of joins reached.", "loadLayer()");
          return(-1);
        }

        if(loadJoin(&(layer->joins[layer->numjoins])) == -1) return(-1);
        layer->numjoins++;
        break;
      case(LABELCACHE):
        if((layer->labelcache = getSymbol(2, MS_ON, MS_OFF)) == -1) return(-1);
        break;
      case(LABELITEM):
        if(getString(&layer->labelitem) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->labelitem, msLookupHashTable(&(layer->validation), "labelitem"), msLookupHashTable(&(map->web.validation), "labelitem"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based LABELITEM configuration failed pattern validation." , "loadLayer()");
            msFree(layer->labelitem);
            layer->labelitem=NULL;
            return(-1);
          }
        }
        break;
      case(LABELMAXSCALE):
      case(LABELMAXSCALEDENOM):
        if(getDouble(&(layer->labelmaxscaledenom)) == -1) return(-1);
        break;
      case(LABELMINSCALE):
      case(LABELMINSCALEDENOM):
        if(getDouble(&(layer->labelminscaledenom)) == -1) return(-1);
        break;
      case(LABELREQUIRES):
        if(getString(&layer->labelrequires) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->labelrequires, msLookupHashTable(&(layer->validation), "labelrequires"), msLookupHashTable(&(map->web.validation), "labelrequires"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based LABELREQUIRES configuration failed pattern validation." , "loadLayer()");
            msFree(layer->labelrequires);
            layer->labelrequires=NULL;
            return(-1);
          }
        }
        break;
      case(LAYER):
        break; /* for string loads */
      case(MASK):
        if(getString(&layer->mask) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->mask, msLookupHashTable(&(layer->validation), "mask"), msLookupHashTable(&(map->web.validation), "mask"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based MASK configuration failed pattern validation." , "loadLayer()");
            msFree(layer->mask);
            layer->mask=NULL;
            return(-1);
          }
        }
        break;
      case(MAXFEATURES):
        if(getInteger(&(layer->maxfeatures)) == -1) return(-1);
        break;
      case(MAXSCALE):
      case(MAXSCALEDENOM):
        if(getDouble(&(layer->maxscaledenom)) == -1) return(-1);
        break;
      case(MAXGEOWIDTH):
        if(getDouble(&(layer->maxgeowidth)) == -1) return(-1);
        break;
      case(METADATA):
        if(loadHashTable(&(layer->metadata)) != MS_SUCCESS) return(-1);
        break;
      case(MINSCALE):
      case(MINSCALEDENOM):
        if(getDouble(&(layer->minscaledenom)) == -1) return(-1);
        break;
      case(MINGEOWIDTH):
        if(getDouble(&(layer->mingeowidth)) == -1) return(-1);
        break;
      case(MINFEATURESIZE):
        if(getInteger(&(layer->minfeaturesize)) == -1) return(-1);
        break;
      case(NAME):
        if(getString(&layer->name) == MS_FAILURE) return(-1);
        break;
      case(OFFSITE):
        if(loadColor(&(layer->offsite), NULL) != MS_SUCCESS) return(-1);
        break;
      case(OPACITY):
      case(TRANSPARENCY): /* keyword supported for mapfile backwards compatability */
      {
        int opacity;
        if (getInteger(&opacity) == -1) return(-1);
        if(opacity != 100) {
          if(layer->compositer) {
            msSetError(MS_PARSEERR, "Cannot use OPACITY and COMPOSITER simultaneously at the LAYER level (line %d)", "loadLayer()", msyylineno );
            return -1;
          }
          layer->compositer = msSmallMalloc(sizeof(LayerCompositer));
          initLayerCompositer(layer->compositer);
          layer->compositer->opacity = opacity;
        }
      }
        break;
      case(MS_PLUGIN): {
        int rv;
        if(getString(&layer->plugin_library_original) == MS_FAILURE) return(-1);
        rv = msBuildPluginLibraryPath(&layer->plugin_library,
                                      layer->plugin_library_original,
                                      map);
        if (rv == MS_FAILURE) return(-1);
      }
      break;
      case(PROCESSING): {
        /* NOTE: processing array maintained as size+1 with NULL terminator.
                 This ensure that CSL (GDAL string list) functions can be
                 used on the list for easy processing. */
        char *value=NULL;
        if(getString(&value) == MS_FAILURE) return(-1);
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(value, msLookupHashTable(&(layer->validation), "processing"), msLookupHashTable(&(map->web.validation), "processing"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based PROCESSING configuration failed pattern validation." , "loadLayer()");
            free(value);
            value=NULL;
            return(-1);
          }
        }
        msLayerAddProcessing( layer, value );
        free(value);
        value=NULL;
      }
      break;
      case(POSTLABELCACHE):
        if((layer->postlabelcache = getSymbol(2, MS_TRUE, MS_FALSE)) == -1) return(-1);
        if(layer->postlabelcache)
          layer->labelcache = MS_OFF;
        break;
      case(PROJECTION):
        if(loadProjection(&(layer->projection)) == -1) return(-1);
        layer->project = MS_TRUE;
        break;
      case(REQUIRES):
        if(getString(&layer->requires) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->requires, msLookupHashTable(&(layer->validation), "requires"), msLookupHashTable(&(map->web.validation), "requires"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based REQUIRES configuration failed pattern validation." , "loadLayer()");
            msFree(layer->requires);
            layer->requires=NULL;
            return(-1);
          }
        }
        break;
      case(SCALETOKEN):
        if (msGrowLayerScaletokens(layer) == NULL)
          return(-1);
        initScaleToken(&layer->scaletokens[layer->numscaletokens]);
        if(loadScaletoken(&layer->scaletokens[layer->numscaletokens], layer) == -1) return(-1);
        layer->numscaletokens++;
        break;
      case(SIZEUNITS):
        if((layer->sizeunits = getSymbol(8, MS_INCHES,MS_FEET,MS_MILES,MS_METERS,MS_KILOMETERS,MS_NAUTICALMILES,MS_DD,MS_PIXELS)) == -1) return(-1);
        break;
      case(STATUS):
        if((layer->status = getSymbol(3, MS_ON,MS_OFF,MS_DEFAULT)) == -1) return(-1);
        break;
      case(STYLEITEM):
        if(getString(&layer->styleitem) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->styleitem, msLookupHashTable(&(layer->validation), "styleitem"), msLookupHashTable(&(map->web.validation), "styleitem"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based STYLEITEM configuration failed pattern validation." , "loadLayer()");
            msFree(layer->styleitem);
            layer->styleitem=NULL;
            return(-1);
          }
        }
        break;
      case(SYMBOLSCALE):
      case(SYMBOLSCALEDENOM):
        if(getDouble(&(layer->symbolscaledenom)) == -1) return(-1);
        break;
      case(TEMPLATE):
        if(getString(&layer->template) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->template, msLookupHashTable(&(layer->validation), "template"), msLookupHashTable(&(map->web.validation), "template"), map->templatepattern, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based TEMPLATE configuration failed pattern validation." , "loadLayer()");
            msFree(layer->template);
            layer->template=NULL;
            return(-1);
          }
        }
        break;
      case(TILEINDEX):
        if(getString(&layer->tileindex) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->tileindex, msLookupHashTable(&(layer->validation), "tileindex"), msLookupHashTable(&(map->web.validation), "tileindex"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based TILEINDEX configuration failed pattern validation." , "loadLayer()");
            msFree(layer->tileindex);
            layer->tileindex=NULL;
            return(-1);
          }
        }
        break;
      case(TILEITEM):
        if(getString(&layer->tileitem) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->tileitem, msLookupHashTable(&(layer->validation), "tileitem"), msLookupHashTable(&(map->web.validation), "tileitem"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based TILEITEM configuration failed pattern validation." , "loadLayer()");
            msFree(layer->tileitem);
            layer->tileitem=NULL;
            return(-1);
          }
        }
        break;
      case(TILESRS):
        if(getString(&layer->tilesrs) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(layer->tilesrs, msLookupHashTable(&(layer->validation), "tilesrs"), msLookupHashTable(&(map->web.validation), "tilesrs"), NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based TILESRS configuration failed pattern validation." , "loadLayer()");
            msFree(layer->tilesrs);
            layer->tilesrs=NULL;
            return(-1);
          }
        }
        break;
      case(TOLERANCE):
        if(getDouble(&(layer->tolerance)) == -1) return(-1);
        break;
      case(TOLERANCEUNITS):
        if((layer->toleranceunits = getSymbol(8, MS_INCHES,MS_FEET,MS_MILES,MS_METERS,MS_KILOMETERS,MS_NAUTICALMILES,MS_DD,MS_PIXELS)) == -1) return(-1);
        break;
      case(TRANSFORM):
        if((layer->transform = getSymbol(11, MS_TRUE,MS_FALSE, MS_UL,MS_UC,MS_UR,MS_CL,MS_CC,MS_CR,MS_LL,MS_LC,MS_LR)) == -1) return(-1);
        break;
      case(TYPE):
        if((type = getSymbol(9, MS_LAYER_POINT,MS_LAYER_LINE,MS_LAYER_RASTER,MS_LAYER_POLYGON,MS_LAYER_ANNOTATION,MS_LAYER_QUERY,MS_LAYER_CIRCLE,MS_LAYER_CHART,TILEINDEX)) == -1) return(-1);
        if(type == TILEINDEX) type = MS_LAYER_TILEINDEX; /* TILEINDEX is also a parameter */
        if(type == MS_LAYER_ANNOTATION) {
          msSetError(MS_IDENTERR, "Annotation Layers have been removed. To obtain same functionality, use a layer with label->styles and no class->styles", "loadLayer()");
          return -1;
        }
        layer->type = type;
        break;
      case(UNITS):
        if((layer->units = getSymbol(9, MS_INCHES,MS_FEET,MS_MILES,MS_METERS,MS_KILOMETERS,MS_NAUTICALMILES,MS_DD,MS_PIXELS,MS_PERCENTAGES)) == -1) return(-1);
        break;
      case(UTFDATA):
        if(loadExpression(&(layer->utfdata)) == -1) return(-1); /* loadExpression() cleans up previously allocated expression */
        break;
      case(UTFITEM):
        if(getString(&layer->utfitem) == MS_FAILURE) return(-1); /* loadExpression() cleans up previously allocated expression */
        break;
      case(VALIDATION):
        if(loadHashTable(&(layer->validation)) != MS_SUCCESS) return(-1);
        break;
      default:
        if(strlen(msyystring_buffer) > 0) {
          msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadLayer()", msyystring_buffer, msyylineno);
          return(-1);
        } else {
          return(0); /* end of a string, not an error */
        }
    }
  } /* next token */
}

int msUpdateLayerFromString(layerObj *layer, char *string, int url_string)
{
  int i;

  if(!layer || !string) return MS_FAILURE;

  msAcquireLock( TLOCK_PARSER );

  if(url_string)
    msyystate = MS_TOKENIZE_URL_STRING;
  else
    msyystate = MS_TOKENIZE_STRING;
  msyystring = string;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyylineno = 1; /* start at line 1 */

  if(loadLayer(layer, layer->map) == -1) {
    msReleaseLock( TLOCK_PARSER );
    return MS_FAILURE; /* parse error */;
  }
  msReleaseLock( TLOCK_PARSER );

  msyylex_destroy();

  /* step through classes to resolve symbol names */
  for(i=0; i<layer->numclasses; i++) {
    if(classResolveSymbolNames(layer->class[i]) != MS_SUCCESS) return MS_FAILURE;
  }

  return MS_SUCCESS;
}

static void writeCompositingFilter(FILE *stream, int indent, CompositingFilter *filter) {
  while(filter) {
    writeString(stream, indent, "COMPFILTER", "", filter->filter);
    filter = filter->next;
  }
}

static void writeLayerCompositer(FILE *stream, int indent, LayerCompositer *compositor) {
  indent++;
  while(compositor) {
    writeBlockBegin(stream, indent, "COMPOSITE");
    writeCompositingFilter(stream, indent, compositor->filter);
    if(compositor->comp_op != MS_COMPOP_SRC_OVER) {
      switch(compositor->comp_op) {
        case MS_COMPOP_CLEAR:
          writeString(stream, indent, "COMPOP", NULL, "clear");
          break;
        case MS_COMPOP_COLOR_BURN:
          writeString(stream, indent, "COMPOP", NULL, "color-burn");
          break;
        case MS_COMPOP_COLOR_DODGE:
          writeString(stream, indent, "COMPOP", NULL, "color-dodge");
          break;
        case MS_COMPOP_CONTRAST:
          writeString(stream, indent, "COMPOP", NULL, "contrast");
          break;
        case MS_COMPOP_DARKEN:
          writeString(stream, indent, "COMPOP", NULL, "darken");
          break;
        case MS_COMPOP_DIFFERENCE:
          writeString(stream, indent, "COMPOP", NULL, "difference");
          break;
        case MS_COMPOP_DST:
          writeString(stream, indent, "COMPOP", NULL, "dst");
          break;
        case MS_COMPOP_DST_ATOP:
          writeString(stream, indent, "COMPOP", NULL, "dst-atop");
          break;
        case MS_COMPOP_DST_IN:
          writeString(stream, indent, "COMPOP", NULL, "dst-in");
          break;
        case MS_COMPOP_DST_OUT:
          writeString(stream, indent, "COMPOP", NULL, "dst-out");
          break;
        case MS_COMPOP_DST_OVER:
          writeString(stream, indent, "COMPOP", NULL, "dst-over");
          break;
        case MS_COMPOP_EXCLUSION:
          writeString(stream, indent, "COMPOP", NULL, "exclusion");
          break;
        case MS_COMPOP_HARD_LIGHT:
          writeString(stream, indent, "COMPOP", NULL, "hard-light");
          break;
        case MS_COMPOP_INVERT:
          writeString(stream, indent, "COMPOP", NULL, "invert");
          break;
        case MS_COMPOP_INVERT_RGB:
          writeString(stream, indent, "COMPOP", NULL, "invert-rgb");
          break;
        case MS_COMPOP_LIGHTEN:
          writeString(stream, indent, "COMPOP", NULL, "lighten");
          break;
        case MS_COMPOP_MINUS:
          writeString(stream, indent, "COMPOP", NULL, "minus");
          break;
        case MS_COMPOP_MULTIPLY:
          writeString(stream, indent, "COMPOP", NULL, "multiply");
          break;
        case MS_COMPOP_OVERLAY:
          writeString(stream, indent, "COMPOP", NULL, "overlay");
          break;
        case MS_COMPOP_PLUS:
          writeString(stream, indent, "COMPOP", NULL, "plus");
          break;
        case MS_COMPOP_SCREEN:
          writeString(stream, indent, "COMPOP", NULL, "screen");
          break;
        case MS_COMPOP_SOFT_LIGHT:
          writeString(stream, indent, "COMPOP", NULL, "soft-light");
          break;
        case MS_COMPOP_SRC:
          writeString(stream, indent, "COMPOP", NULL, "src");
          break;
        case MS_COMPOP_SRC_ATOP:
          writeString(stream, indent, "COMPOP", NULL, "src-atop");
          break;
        case MS_COMPOP_SRC_IN:
          writeString(stream, indent, "COMPOP", NULL, "src-in");
          break;
        case MS_COMPOP_SRC_OUT:
          writeString(stream, indent, "COMPOP", NULL, "src-out");
          break;
        case MS_COMPOP_SRC_OVER:
          writeString(stream, indent, "COMPOP", NULL, "src-over");
          break;
        case MS_COMPOP_XOR:
          writeString(stream, indent, "COMPOP", NULL, "xor");
          break;
      }
    }
    writeNumber(stream,indent,"OPACITY",100,compositor->opacity);
    writeBlockEnd(stream,indent,"COMPOSITE");
    compositor = compositor->next;
  }
}
static void writeLayer(FILE *stream, int indent, layerObj *layer)
{
  int i;
  featureListNodeObjPtr current=NULL;

  if(layer->status == MS_DELETE)
    return;

  indent++;
  writeBlockBegin(stream, indent, "LAYER");
  /* bindvals */
  /* class - see below */
  writeString(stream, indent, "CLASSGROUP", NULL, layer->classgroup);
  writeString(stream, indent, "CLASSITEM", NULL, layer->classitem);
  writeCluster(stream, indent, &(layer->cluster));
  writeLayerCompositer(stream, indent, layer->compositer);
  writeString(stream, indent, "CONNECTION", NULL, layer->connection);
  writeKeyword(stream, indent, "CONNECTIONTYPE", layer->connectiontype, 10, MS_OGR, "OGR", MS_POSTGIS, "POSTGIS", MS_WMS, "WMS", MS_ORACLESPATIAL, "ORACLESPATIAL", MS_WFS, "WFS", MS_PLUGIN, "PLUGIN", MS_UNION, "UNION", MS_UVRASTER, "UVRASTER", MS_CONTOUR, "CONTOUR", MS_KERNELDENSITY, "KERNELDENSITY");
  writeString(stream, indent, "DATA", NULL, layer->data);
  writeNumber(stream, indent, "DEBUG", 0, layer->debug); /* is this right? see loadLayer() */
  writeString(stream, indent, "ENCODING", NULL, layer->encoding);
  writeExtent(stream, indent, "EXTENT", layer->extent);
  writeExpression(stream, indent, "FILTER", &(layer->filter));
  writeString(stream, indent, "FILTERITEM", NULL, layer->filteritem);
  writeString(stream, indent, "FOOTER", NULL, layer->footer);
  writeString(stream, indent, "GROUP", NULL, layer->group);

  if(layer->_geomtransform.type == MS_GEOMTRANSFORM_EXPRESSION) {
    writeIndent(stream, indent + 1);
    fprintf(stream, "GEOMTRANSFORM (%s)\n", layer->_geomtransform.string);
  }
  
  writeString(stream, indent, "HEADER", NULL, layer->header);
  /* join - see below */
  writeKeyword(stream, indent, "LABELCACHE", layer->labelcache, 1, MS_OFF, "OFF");
  writeString(stream, indent, "LABELITEM", NULL, layer->labelitem);
  writeNumber(stream, indent, "LABELMAXSCALEDENOM", -1, layer->labelmaxscaledenom);
  writeNumber(stream, indent, "LABELMINSCALEDENOM", -1, layer->labelminscaledenom);
  writeString(stream, indent, "LABELREQUIRES", NULL, layer->labelrequires);
  writeNumber(stream, indent, "MAXFEATURES", -1, layer->maxfeatures);
  writeNumber(stream, indent, "MAXGEOWIDTH", -1, layer->maxgeowidth);
  writeNumber(stream, indent, "MAXSCALEDENOM", -1, layer->maxscaledenom);
  writeString(stream, indent, "MASK", NULL, layer->mask);
  writeHashTable(stream, indent, "METADATA", &(layer->metadata));
  writeNumber(stream, indent, "MINGEOWIDTH", -1, layer->mingeowidth);
  writeNumber(stream, indent, "MINSCALEDENOM", -1, layer->minscaledenom);
  writeNumber(stream, indent, "MINFEATURESIZE", -1, layer->minfeaturesize);
  writeString(stream, indent, "NAME", NULL, layer->name);
  writeColor(stream, indent, "OFFSITE", NULL, &(layer->offsite));
  writeString(stream, indent, "PLUGIN", NULL, layer->plugin_library_original);
  writeKeyword(stream, indent, "POSTLABELCACHE", layer->postlabelcache, 1, MS_TRUE, "TRUE");
  for(i=0; i<layer->numprocessing; i++)
    writeString(stream, indent, "PROCESSING", NULL, layer->processing[i]);
  writeProjection(stream, indent, &(layer->projection));
  writeString(stream, indent, "REQUIRES", NULL, layer->requires);
  writeKeyword(stream, indent, "SIZEUNITS", layer->sizeunits, 7, MS_INCHES, "INCHES", MS_FEET ,"FEET", MS_MILES, "MILES", MS_METERS, "METERS", MS_KILOMETERS, "KILOMETERS", MS_NAUTICALMILES, "NAUTICALMILES", MS_DD, "DD");
  writeKeyword(stream, indent, "STATUS", layer->status, 3, MS_ON, "ON", MS_OFF, "OFF", MS_DEFAULT, "DEFAULT");
  writeString(stream, indent, "STYLEITEM", NULL, layer->styleitem);
  writeNumber(stream, indent, "SYMBOLSCALEDENOM", -1, layer->symbolscaledenom);
  writeString(stream, indent, "TEMPLATE", NULL, layer->template);
  writeString(stream, indent, "TILEINDEX", NULL, layer->tileindex);
  writeString(stream, indent, "TILEITEM", NULL, layer->tileitem);
  writeString(stream, indent, "TILESRS", NULL, layer->tilesrs);
  writeNumber(stream, indent, "TOLERANCE", -1, layer->tolerance);
  writeKeyword(stream, indent, "TOLERANCEUNITS", layer->toleranceunits, 7, MS_INCHES, "INCHES", MS_FEET ,"FEET", MS_MILES, "MILES", MS_METERS, "METERS", MS_KILOMETERS, "KILOMETERS", MS_NAUTICALMILES, "NAUTICALMILES", MS_DD, "DD");
  writeKeyword(stream, indent, "TRANSFORM", layer->transform, 10, MS_FALSE, "FALSE", MS_UL, "UL", MS_UC, "UC", MS_UR, "UR", MS_CL, "CL", MS_CC, "CC", MS_CR, "CR", MS_LL, "LL", MS_LC, "LC", MS_LR, "LR");
  writeKeyword(stream, indent, "TYPE", layer->type, 9, MS_LAYER_POINT, "POINT", MS_LAYER_LINE, "LINE", MS_LAYER_POLYGON, "POLYGON", MS_LAYER_RASTER, "RASTER", MS_LAYER_ANNOTATION, "ANNOTATION", MS_LAYER_QUERY, "QUERY", MS_LAYER_CIRCLE, "CIRCLE", MS_LAYER_TILEINDEX, "TILEINDEX", MS_LAYER_CHART, "CHART");
  writeKeyword(stream, indent, "UNITS", layer->units, 9, MS_INCHES, "INCHES", MS_FEET ,"FEET", MS_MILES, "MILES", MS_METERS, "METERS", MS_KILOMETERS, "KILOMETERS", MS_NAUTICALMILES, "NAUTICALMILES", MS_DD, "DD", MS_PIXELS, "PIXELS", MS_PERCENTAGES, "PERCENTATGES");
  writeHashTable(stream, indent, "VALIDATION", &(layer->validation));

  /* write potentially multiply occuring objects last */
  for(i=0; i<layer->numscaletokens; i++)  writeScaleToken(stream, indent, &(layer->scaletokens[i]));
  for(i=0; i<layer->numjoins; i++)  writeJoin(stream, indent, &(layer->joins[i]));
  for(i=0; i<layer->numclasses; i++) writeClass(stream, indent, layer->class[i]);

  if( layer->grid &&  layer->connectiontype == MS_GRATICULE)
    writeGrid(stream, indent, layer->grid);
  else {
    current = layer->features;
    while(current != NULL) {
      writeFeature(stream, indent, &(current->shape));
      current = current->next;
    }
  }

  writeBlockEnd(stream, indent, "LAYER");
  writeLineFeed(stream);
}

char* msWriteLayerToString(layerObj *layer)
{
  msIOContext  context;
  msIOBuffer buffer;

  context.label = NULL;
  context.write_channel = MS_TRUE;
  context.readWriteFunc = msIO_bufferWrite;
  context.cbData = &buffer;
  buffer.data = NULL;
  buffer.data_len = 0;
  buffer.data_offset = 0;

  msIO_installHandlers( NULL, &context, NULL );

  writeLayer(stdout, -1, layer);
  msIO_bufferWrite( &buffer, "", 1 );

  msIO_installHandlers( NULL, NULL, NULL );

  return (char*)buffer.data;
}

/*
** Initialize, load and free a referenceMapObj structure
*/
void initReferenceMap(referenceMapObj *ref)
{
  ref->height = ref->width = 0;
  ref->extent.minx = ref->extent.miny = ref->extent.maxx = ref->extent.maxy = -1.0;
  ref->image = NULL;
  MS_INIT_COLOR(ref->color, 255, 0, 0, 255);
  MS_INIT_COLOR(ref->outlinecolor, 0, 0, 0, 255);
  ref->status = MS_OFF;
  ref->marker = 0;
  ref->markername = NULL;
  ref->markersize = 0;
  ref->minboxsize = 3;
  ref->maxboxsize = 0;
  ref->map = NULL;
}

void freeReferenceMap(referenceMapObj *ref)
{
  msFree(ref->image);
  msFree(ref->markername);
}

int loadReferenceMap(referenceMapObj *ref, mapObj *map)
{
  int state;

  ref->map = (mapObj *)map;

  for(;;) {
    switch(msyylex()) {
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadReferenceMap()");
        return(-1);
      case(END):
        if(!ref->image) {
          msSetError(MS_MISCERR, "No image defined for the reference map.", "loadReferenceMap()");
          return(-1);
        }
        if(ref->width == 0 || ref->height == 0) {
          msSetError(MS_MISCERR, "No image size defined for the reference map.", "loadReferenceMap()");
          return(-1);
        }
        return(0);
        break;
      case(COLOR):
        if(loadColor(&(ref->color), NULL) != MS_SUCCESS) return(-1);
        break;
      case(EXTENT):
        if(getDouble(&(ref->extent.minx)) == -1) return(-1);
        if(getDouble(&(ref->extent.miny)) == -1) return(-1);
        if(getDouble(&(ref->extent.maxx)) == -1) return(-1);
        if(getDouble(&(ref->extent.maxy)) == -1) return(-1);
        if (!MS_VALID_EXTENT(ref->extent)) {
          msSetError(MS_MISCERR, "Given reference extent is invalid. Check that it " \
                     "is in the form: minx, miny, maxx, maxy", "loadReferenceMap()");
          return(-1);
        }
        break;
      case(IMAGE):
        if(getString(&ref->image) == MS_FAILURE) return(-1);
        break;
      case(OUTLINECOLOR):
        if(loadColor(&(ref->outlinecolor), NULL) != MS_SUCCESS) return(-1);
        break;
      case(SIZE):
        if(getInteger(&(ref->width)) == -1) return(-1);
        if(getInteger(&(ref->height)) == -1) return(-1);
        break;
      case(STATUS):
        if((ref->status = getSymbol(2, MS_ON,MS_OFF)) == -1) return(-1);
        break;
      case(MARKER):
        if((state = getSymbol(2, MS_NUMBER,MS_STRING)) == -1) return(-1);

        if(state == MS_NUMBER)
          ref->marker = (int) msyynumber;
        else {
          if (ref->markername != NULL)
            msFree(ref->markername);
          ref->markername = msStrdup(msyystring_buffer);
        }
        break;
      case(MARKERSIZE):
        if(getInteger(&(ref->markersize)) == -1) return(-1);
        break;
      case(MINBOXSIZE):
        if(getInteger(&(ref->minboxsize)) == -1) return(-1);
        break;
      case(MAXBOXSIZE):
        if(getInteger(&(ref->maxboxsize)) == -1) return(-1);
        break;
      case(REFERENCE):
        break; /* for string loads */
      default:
        if(strlen(msyystring_buffer) > 0) {
          msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadReferenceMap()", msyystring_buffer, msyylineno);
          return(-1);
        } else {
          return(0); /* end of a string, not an error */
        }
    }
  } /* next token */
}

int msUpdateReferenceMapFromString(referenceMapObj *ref, char *string, int url_string)
{
  if(!ref || !string) return MS_FAILURE;

  msAcquireLock( TLOCK_PARSER );

  if(url_string)
    msyystate = MS_TOKENIZE_URL_STRING;
  else
    msyystate = MS_TOKENIZE_STRING;
  msyystring = string;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyylineno = 1; /* start at line 1 */

  if(loadReferenceMap(ref, ref->map) == -1) {
    msReleaseLock( TLOCK_PARSER );
    return MS_FAILURE; /* parse error */;
  }
  msReleaseLock( TLOCK_PARSER );

  msyylex_destroy();
  return MS_SUCCESS;
}

static void writeReferenceMap(FILE *stream, int indent, referenceMapObj *ref)
{
  colorObj c;

  if(!ref->image) return;

  indent++;
  writeBlockBegin(stream, indent, "REFERENCE");
  MS_INIT_COLOR(c,255,0,0,255);
  writeColor(stream, indent, "COLOR", &c, &(ref->color));
  writeExtent(stream, indent, "EXTENT", ref->extent);
  writeString(stream, indent, "IMAGE", NULL, ref->image);
  MS_INIT_COLOR(c,0,0,0,255);
  writeColor(stream, indent, "OUTLINECOLOR", &c, &(ref->outlinecolor));
  writeDimension(stream, indent, "SIZE", ref->width, ref->height, NULL, NULL);
  writeKeyword(stream, indent, "STATUS", ref->status, 2, MS_ON, "ON", MS_OFF, "OFF");
  writeNumberOrString(stream, indent, "MARKER", 0, ref->marker, ref->markername);
  writeNumber(stream, indent, "MARKERSIZE", -1, ref->markersize);
  writeNumber(stream, indent, "MAXBOXSIZE", -1, ref->maxboxsize);
  writeNumber(stream, indent, "MINBOXSIZE", -1, ref->minboxsize);
  writeBlockEnd(stream, indent, "REFERENCE");
  writeLineFeed(stream);
}

char* msWriteReferenceMapToString(referenceMapObj *ref)
{
  msIOContext  context;
  msIOBuffer buffer;

  context.label = NULL;
  context.write_channel = MS_TRUE;
  context.readWriteFunc = msIO_bufferWrite;
  context.cbData = &buffer;
  buffer.data = NULL;
  buffer.data_len = 0;
  buffer.data_offset = 0;

  msIO_installHandlers( NULL, &context, NULL );

  writeReferenceMap(stdout, -1, ref);
  msIO_bufferWrite( &buffer, "", 1 );

  msIO_installHandlers( NULL, NULL, NULL );

  return (char*)buffer.data;
}

#define MAX_FORMATOPTIONS 100

static int loadOutputFormat(mapObj *map)
{
  char *name = NULL;
  char *mimetype = NULL;
  char *driver = NULL;
  char *extension = NULL;
  int imagemode = MS_NOOVERRIDE;
  int transparent = MS_NOOVERRIDE;
  char *formatoptions[MAX_FORMATOPTIONS];
  int  numformatoptions = 0;
  char *value = NULL;

  for(;;) {
    switch(msyylex()) {
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadOutputFormat()");
        goto load_output_error;

      case(END): {
        outputFormatObj *format;

        if( driver == NULL ) {
          msSetError(MS_MISCERR,
                     "OUTPUTFORMAT clause lacks DRIVER keyword near (%s):(%d)",
                     "loadOutputFormat()",
                     msyystring_buffer, msyylineno );
          goto load_output_error;
        }

        format = msCreateDefaultOutputFormat( map, driver, name );
        if( format == NULL ) {
          msSetError(MS_MISCERR,
                     "OUTPUTFORMAT (%s) clause references driver (%s), but this driver isn't configured.",
                     "loadOutputFormat()", name, driver );
          goto load_output_error;
        }
        msFree( name );
        name = NULL;
        msFree( driver );
        driver = NULL;

        if( transparent != MS_NOOVERRIDE )
          format->transparent = transparent;
        if( extension != NULL ) {
          msFree( format->extension );
          format->extension = extension;
          extension = NULL;
        }
        if( mimetype != NULL ) {
          msFree( format->mimetype );
          format->mimetype = mimetype;
          mimetype = NULL;
        }
        if( imagemode != MS_NOOVERRIDE ) {
          if(format->renderer != MS_RENDER_WITH_AGG || imagemode != MS_IMAGEMODE_PC256) {
            /* don't force to PC256 with agg, this can happen when using mapfile defined GD
             * ouputformats that are now falling back to agg/png8
             */
            format->imagemode = imagemode;
          }

          if( transparent == MS_NOOVERRIDE ) {
            if( imagemode == MS_IMAGEMODE_RGB  )
              format->transparent = MS_FALSE;
            else if( imagemode == MS_IMAGEMODE_RGBA  )
              format->transparent = MS_TRUE;
          }
          if( format->imagemode == MS_IMAGEMODE_INT16
              || format->imagemode == MS_IMAGEMODE_FLOAT32
              || format->imagemode == MS_IMAGEMODE_BYTE )
            format->renderer = MS_RENDER_WITH_RAWDATA;
        }
        while(numformatoptions--) {
          char *key = strchr(formatoptions[numformatoptions],'=');
          if(!key || !*(key+1)) {
            msSetError(MS_MISCERR,"Failed to parse FORMATOPTION, expecting \"KEY=VALUE\" syntax.","loadOutputFormat()");
            goto load_output_error;
          }
          *key = 0;
          key++;
          msSetOutputFormatOption(format,formatoptions[numformatoptions],key);
          free(formatoptions[numformatoptions]);
        }

        format->inmapfile = MS_TRUE;

        msOutputFormatValidate( format, MS_FALSE );
        return(0);
      }
      case(NAME):
        msFree( name );
        if((name = getToken()) == NULL) 
          goto load_output_error;
        break;
      case(MIMETYPE):
        if(getString(&mimetype) == MS_FAILURE)
          goto load_output_error;
        break;
      case(DRIVER): {
        int s;
        if((s = getSymbol(2, MS_STRING, TEMPLATE)) == -1) /* allow the template to be quoted or not in the mapfile */
          goto load_output_error;
        free(driver);
        if(s == MS_STRING)
          driver = msStrdup(msyystring_buffer);
        else
          driver = msStrdup("TEMPLATE");
      }
      break;
      case(EXTENSION):
        if(getString(&extension) == MS_FAILURE)
          goto load_output_error;
        if( extension[0] == '.' ) {
          char *temp = msStrdup(extension+1);
          free( extension );
          extension = temp;
        }
        break;
      case(FORMATOPTION):
        if(getString(&value) == MS_FAILURE)
          goto load_output_error;
        if( numformatoptions < MAX_FORMATOPTIONS )
          formatoptions[numformatoptions++] = value;
        value=NULL;
        break;
      case(IMAGEMODE):
        value = getToken();
        if( strcasecmp(value,"PC256") == 0 )
          imagemode = MS_IMAGEMODE_PC256;
        else if( strcasecmp(value,"RGB") == 0 )
          imagemode = MS_IMAGEMODE_RGB;
        else if( strcasecmp(value,"RGBA") == 0)
          imagemode = MS_IMAGEMODE_RGBA;
        else if( strcasecmp(value,"INT16") == 0)
          imagemode = MS_IMAGEMODE_INT16;
        else if( strcasecmp(value,"FLOAT32") == 0)
          imagemode = MS_IMAGEMODE_FLOAT32;
        else if( strcasecmp(value,"BYTE") == 0)
          imagemode = MS_IMAGEMODE_BYTE;
        else if( strcasecmp(value,"FEATURE") == 0)
          imagemode = MS_IMAGEMODE_FEATURE;
        else {
          msSetError(MS_IDENTERR,
                     "Parsing error near (%s):(line %d), expected PC256, RGB, RGBA, FEATURE, BYTE, INT16, or FLOAT32 for IMAGEMODE.", "loadOutputFormat()",
                     msyystring_buffer, msyylineno);
          goto load_output_error;
        }
        free(value);
        value=NULL;
        break;
      case(TRANSPARENT):
        if((transparent = getSymbol(2, MS_ON,MS_OFF)) == -1)
          goto load_output_error;
        break;
      default:
        msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadOutputFormat()",
                   msyystring_buffer, msyylineno);
        goto load_output_error;
    }
  } /* next token */
load_output_error:
  msFree( driver );
  msFree( extension );
  msFree( mimetype );
  msFree( name );
  msFree( value );
  return -1;
}

/*
** utility function to write an output format structure to file
*/
static void writeOutputformatobject(FILE *stream, int indent, outputFormatObj *outputformat)
{
  int i = 0;
  if(!outputformat) return;

  indent++;
  writeBlockBegin(stream, indent, "OUTPUTFORMAT");
  writeString(stream, indent, "NAME", NULL, outputformat->name);
  writeString(stream, indent, "MIMETYPE", NULL, outputformat->mimetype);
  writeString(stream, indent, "DRIVER", NULL, outputformat->driver);
  writeString(stream, indent, "EXTENSION", NULL, outputformat->extension);
  writeKeyword(stream, indent, "IMAGEMODE", outputformat->imagemode, 7, MS_IMAGEMODE_PC256, "PC256", MS_IMAGEMODE_RGB, "RGB", MS_IMAGEMODE_RGBA, "RGBA", MS_IMAGEMODE_INT16, "INT16", MS_IMAGEMODE_FLOAT32, "FLOAT32", MS_IMAGEMODE_BYTE, "BYTE", MS_IMAGEMODE_FEATURE, "FEATURE");
  writeKeyword(stream, indent, "TRANSPARENT", outputformat->transparent, 2, MS_TRUE, "TRUE", MS_FALSE, "FALSE");
  for (i=0; i<outputformat->numformatoptions; i++)
    writeString(stream, indent, "FORMATOPTION", NULL, outputformat->formatoptions[i]);
  writeBlockEnd(stream, indent, "OUTPUTFORMAT");
  writeLineFeed(stream);
}


/*
** Write the output formats to file
*/
static void writeOutputformat(FILE *stream, int indent, mapObj *map)
{
  int i=0;
  if(!map->outputformat) return;

  writeOutputformatobject(stream, indent, map->outputformat);
  for(i=0; i<map->numoutputformats; i++) {
    if(map->outputformatlist[i]->inmapfile == MS_TRUE && strcmp(map->outputformatlist[i]->name, map->outputformat->name) != 0)
      writeOutputformatobject(stream, indent, map->outputformatlist[i]);
  }
}

/*
** Initialize, load and free a legendObj structure
*/
void initLegend(legendObj *legend)
{
  legend->height = legend->width = 0;
  MS_INIT_COLOR(legend->imagecolor, 255,255,255,255); /* white */
  MS_INIT_COLOR(legend->outlinecolor, -1,-1,-1,255);
  initLabel(&legend->label);
  legend->label.position = MS_XY; /* override */
  legend->keysizex = 20;
  legend->keysizey = 10;
  legend->keyspacingx = 5;
  legend->keyspacingy = 5;
  legend->status = MS_OFF;
  legend->transparent = MS_NOOVERRIDE;
  legend->interlace = MS_NOOVERRIDE;
  legend->position = MS_LL;
  legend->postlabelcache = MS_FALSE; /* draw with labels */
  legend->template = NULL;
  legend->map = NULL;
}

void freeLegend(legendObj *legend)
{
  if (legend->template)
    free(legend->template);
  freeLabel(&(legend->label));
}

int loadLegend(legendObj *legend, mapObj *map)
{
  legend->map = (mapObj *)map;

  for(;;) {
    switch(msyylex()) {
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadLegend()");
        return(-1);
      case(END):
        legend->label.position = MS_XY; /* overrides go here */
        return(0);
        break;
      case(IMAGECOLOR):
        if(loadColor(&(legend->imagecolor), NULL) != MS_SUCCESS) return(-1);
        break;
      case(INTERLACE):
        if((legend->interlace = getSymbol(2, MS_ON,MS_OFF)) == -1) return(-1);
        break;
      case(KEYSIZE):
        if(getInteger(&(legend->keysizex)) == -1) return(-1);
        if(getInteger(&(legend->keysizey)) == -1) return(-1);
        break;
      case(KEYSPACING):
        if(getInteger(&(legend->keyspacingx)) == -1) return(-1);
        if(getInteger(&(legend->keyspacingy)) == -1) return(-1);
        break;
      case(LABEL):
        if(loadLabel(&(legend->label)) == -1) return(-1);
        legend->label.angle = 0; /* force */
        break;
      case(LEGEND):
        break; /* for string loads */
      case(OUTLINECOLOR):
        if(loadColor(&(legend->outlinecolor), NULL) != MS_SUCCESS) return(-1);
        break;
      case(POSITION):
        if((legend->position = getSymbol(6, MS_UL,MS_UR,MS_LL,MS_LR,MS_UC,MS_LC)) == -1) return(-1);
        break;
      case(POSTLABELCACHE):
        if((legend->postlabelcache = getSymbol(2, MS_TRUE,MS_FALSE)) == -1) return(-1);
        break;
      case(STATUS):
        if((legend->status = getSymbol(3, MS_ON,MS_OFF,MS_EMBED)) == -1) return(-1);
        break;
      case(TRANSPARENT):
        if((legend->transparent = getSymbol(2, MS_ON,MS_OFF)) == -1) return(-1);
        break;
      case(TEMPLATE):
        if(getString(&legend->template) == MS_FAILURE) return(-1);
        break;
      default:
        if(strlen(msyystring_buffer) > 0) {
          msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadLegend()", msyystring_buffer, msyylineno);
          return(-1);
        } else {
          return(0); /* end of a string, not an error */
        }
    }
  } /* next token */
}

int msUpdateLegendFromString(legendObj *legend, char *string, int url_string)
{
  if(!legend || !string) return MS_FAILURE;

  msAcquireLock( TLOCK_PARSER );

  if(url_string)
    msyystate = MS_TOKENIZE_URL_STRING;
  else
    msyystate = MS_TOKENIZE_STRING;
  msyystring = string;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyylineno = 1; /* start at line 1 */

  if(loadLegend(legend, legend->map) == -1) {
    msReleaseLock( TLOCK_PARSER );
    return MS_FAILURE; /* parse error */;
  }
  msReleaseLock( TLOCK_PARSER );

  msyylex_destroy();
  return MS_SUCCESS;
}

static void writeLegend(FILE *stream, int indent, legendObj *legend)
{
  colorObj c;

  indent++;
  writeBlockBegin(stream, indent, "LEGEND");
  MS_INIT_COLOR(c,255,255,255,255);
  writeColor(stream, indent, "IMAGECOLOR", &c, &(legend->imagecolor));
  writeKeyword(stream, indent, "INTERLACE", legend->interlace, 2, MS_TRUE, "TRUE", MS_FALSE, "FALSE");
  writeDimension(stream, indent, "KEYSIZE", legend->keysizex, legend->keysizey, NULL, NULL);
  writeDimension(stream, indent, "KEYSPACING", legend->keyspacingx, legend->keyspacingy, NULL, NULL);
  writeLabel(stream, indent, &(legend->label));
  writeColor(stream, indent, "OUTLINECOLOR", NULL, &(legend->outlinecolor));
  if(legend->status == MS_EMBED) writeKeyword(stream, indent, "POSITION", legend->position, 6, MS_LL, "LL", MS_UL, "UL", MS_UR, "UR", MS_LR, "LR", MS_UC, "UC", MS_LC, "LC");
  writeKeyword(stream, indent, "POSTLABELCACHE", legend->postlabelcache, 1, MS_TRUE, "TRUE");
  writeKeyword(stream, indent, "STATUS", legend->status, 3, MS_ON, "ON", MS_OFF, "OFF", MS_EMBED, "EMBED");
  writeKeyword(stream, indent, "TRANSPARENT", legend->transparent, 2, MS_TRUE, "TRUE", MS_FALSE, "FALSE");
  writeString(stream, indent, "TEMPLATE", NULL, legend->template);
  writeBlockEnd(stream, indent, "LEGEND");
  writeLineFeed(stream);
}

char* msWriteLegendToString(legendObj *legend)
{
  msIOContext  context;
  msIOBuffer buffer;

  context.label = NULL;
  context.write_channel = MS_TRUE;
  context.readWriteFunc = msIO_bufferWrite;
  context.cbData = &buffer;
  buffer.data = NULL;
  buffer.data_len = 0;
  buffer.data_offset = 0;

  msIO_installHandlers( NULL, &context, NULL );

  writeLegend(stdout, -1, legend);
  msIO_bufferWrite( &buffer, "", 1 );

  msIO_installHandlers( NULL, NULL, NULL );

  return (char*)buffer.data;
}

/*
** Initialize, load and free a scalebarObj structure
*/
void initScalebar(scalebarObj *scalebar)
{
  MS_INIT_COLOR(scalebar->imagecolor, -1,-1,-1,255);
  scalebar->width = 200;
  scalebar->height = 3;
  scalebar->style = 0; /* only 2 styles at this point */
  scalebar->intervals = 4;
  initLabel(&scalebar->label);
  scalebar->label.position = MS_XY; /* override */
  MS_INIT_COLOR(scalebar->backgroundcolor, -1,-1,-1,255);  /* if not set, scalebar creation needs to set this to match the background color */
  MS_INIT_COLOR(scalebar->color, 0,0,0,255); /* default to black */
  MS_INIT_COLOR(scalebar->outlinecolor, -1,-1,-1,255);
  scalebar->units = MS_MILES;
  scalebar->status = MS_OFF;
  scalebar->position = MS_LL;
  scalebar->transparent = MS_NOOVERRIDE; /* no transparency */
  scalebar->interlace = MS_NOOVERRIDE;
  scalebar->postlabelcache = MS_FALSE; /* draw with labels */
  scalebar->align = MS_ALIGN_CENTER;
  scalebar->offsetx = 0;
  scalebar->offsety = 0;
}

void freeScalebar(scalebarObj *scalebar)
{
  freeLabel(&(scalebar->label));
}

int loadScalebar(scalebarObj *scalebar)
{
  for(;;) {
    switch(msyylex()) {
      case(ALIGN):
        if((scalebar->align = getSymbol(3, MS_ALIGN_LEFT,MS_ALIGN_CENTER,MS_ALIGN_RIGHT)) == -1) return(-1);
        break;
      case(BACKGROUNDCOLOR):
        if(loadColor(&(scalebar->backgroundcolor), NULL) != MS_SUCCESS) return(-1);
        break;
      case(COLOR):
        if(loadColor(&(scalebar->color), NULL) != MS_SUCCESS) return(-1);
        break;
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadScalebar()");
        return(-1);
      case(END):
        return(0);
        break;
      case(IMAGECOLOR):
        if(loadColor(&(scalebar->imagecolor), NULL) != MS_SUCCESS) return(-1);
        break;
      case(INTERLACE):
        if((scalebar->interlace = getSymbol(2, MS_ON,MS_OFF)) == -1) return(-1);
        break;
      case(INTERVALS):
        if(getInteger(&(scalebar->intervals)) == -1) return(-1);
        break;
      case(LABEL):
        if(loadLabel(&(scalebar->label)) == -1) return(-1);
        scalebar->label.angle = 0;
        break;
      case(OUTLINECOLOR):
        if(loadColor(&(scalebar->outlinecolor), NULL) != MS_SUCCESS) return(-1);
        break;
      case(POSITION):
        if((scalebar->position = getSymbol(6, MS_UL,MS_UR,MS_LL,MS_LR,MS_UC,MS_LC)) == -1)
          return(-1);
        break;
      case(POSTLABELCACHE):
        if((scalebar->postlabelcache = getSymbol(2, MS_TRUE,MS_FALSE)) == -1) return(-1);
        break;
      case(SCALEBAR):
        break; /* for string loads */
      case(SIZE):
        if(getInteger(&(scalebar->width)) == -1) return(-1);
        if(getInteger(&(scalebar->height)) == -1) return(-1);
        break;
      case(STATUS):
        if((scalebar->status = getSymbol(3, MS_ON,MS_OFF,MS_EMBED)) == -1) return(-1);
        break;
      case(STYLE):
        if(getInteger(&(scalebar->style)) == -1) return(-1);
        break;
      case(TRANSPARENT):
        if((scalebar->transparent = getSymbol(2, MS_ON,MS_OFF)) == -1) return(-1);
        break;
      case(UNITS):
        if((scalebar->units = getSymbol(6, MS_INCHES,MS_FEET,MS_MILES,MS_METERS,MS_KILOMETERS,MS_NAUTICALMILES)) == -1) return(-1);
        break;
      case(OFFSET):
        if(getInteger(&(scalebar->offsetx)) == -1) return(-1);
        if(getInteger(&(scalebar->offsety)) == -1) return(-1);
        break;
      default:
        if(strlen(msyystring_buffer) > 0) {
          msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadScalebar()", msyystring_buffer, msyylineno);
          return(-1);
        } else {
          return(0); /* end of a string, not an error */
        }
    }
  } /* next token */
}

int msUpdateScalebarFromString(scalebarObj *scalebar, char *string, int url_string)
{
  if(!scalebar || !string) return MS_FAILURE;

  msAcquireLock( TLOCK_PARSER );

  if(url_string)
    msyystate = MS_TOKENIZE_URL_STRING;
  else
    msyystate = MS_TOKENIZE_STRING;
  msyystring = string;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyylineno = 1; /* start at line 1 */

  if(loadScalebar(scalebar) == -1) {
    msReleaseLock( TLOCK_PARSER );
    return MS_FAILURE; /* parse error */;
  }
  msReleaseLock( TLOCK_PARSER );

  msyylex_destroy();
  return MS_SUCCESS;
}

static void writeScalebar(FILE *stream, int indent, scalebarObj *scalebar)
{
  colorObj c;

  indent++;
  writeBlockBegin(stream, indent, "SCALEBAR");
  writeKeyword(stream, indent, "ALIGN", scalebar->align, 2, MS_ALIGN_LEFT, "LEFT", MS_ALIGN_RIGHT, "RIGHT");
  writeColor(stream, indent, "BACKGROUNDCOLOR", NULL, &(scalebar->backgroundcolor));
  MS_INIT_COLOR(c,0,0,0,255);
  writeColor(stream, indent, "COLOR", &c, &(scalebar->color));
  writeColor(stream, indent, "IMAGECOLOR", NULL, &(scalebar->imagecolor));
  writeKeyword(stream, indent, "INTERLACE", scalebar->interlace, 2, MS_TRUE, "TRUE", MS_FALSE, "FALSE");
  writeNumber(stream, indent, "INTERVALS", -1, scalebar->intervals);
  writeLabel(stream, indent, &(scalebar->label));
  writeColor(stream, indent, "OUTLINECOLOR", NULL, &(scalebar->outlinecolor));
  if(scalebar->status == MS_EMBED) writeKeyword(stream, indent, "POSITION", scalebar->position, 6, MS_LL, "LL", MS_UL, "UL", MS_UR, "UR", MS_LR, "LR", MS_UC, "UC", MS_LC, "LC");
  writeKeyword(stream, indent, "POSTLABELCACHE", scalebar->postlabelcache, 1, MS_TRUE, "TRUE");
  writeDimension(stream, indent, "SIZE", scalebar->width, scalebar->height, NULL, NULL);
  writeKeyword(stream, indent, "STATUS", scalebar->status, 3, MS_ON, "ON", MS_OFF, "OFF", MS_EMBED, "EMBED");
  writeNumber(stream, indent, "STYLE", 0, scalebar->style);
  writeKeyword(stream, indent, "TRANSPARENT", scalebar->transparent, 2, MS_TRUE, "TRUE", MS_FALSE, "FALSE");
  writeKeyword(stream, indent, "UNITS", scalebar->units, 6, MS_INCHES, "INCHES", MS_FEET ,"FEET", MS_MILES, "MILES", MS_METERS, "METERS", MS_KILOMETERS, "KILOMETERS", MS_NAUTICALMILES, "NAUTICALMILES");
  writeBlockEnd(stream, indent, "SCALEBAR");
  writeLineFeed(stream);
}

char* msWriteScalebarToString(scalebarObj *scalebar)
{
  msIOContext  context;
  msIOBuffer buffer;

  context.label = NULL;
  context.write_channel = MS_TRUE;
  context.readWriteFunc = msIO_bufferWrite;
  context.cbData = &buffer;
  buffer.data = NULL;
  buffer.data_len = 0;
  buffer.data_offset = 0;

  msIO_installHandlers( NULL, &context, NULL );

  writeScalebar(stdout, -1, scalebar);
  msIO_bufferWrite( &buffer, "", 1 );

  msIO_installHandlers( NULL, NULL, NULL );

  return (char*)buffer.data;
}

/*
** Initialize a queryMapObj structure
*/
void initQueryMap(queryMapObj *querymap)
{
  querymap->width = querymap->height = -1;
  querymap->style = MS_HILITE;
  querymap->status = MS_OFF;
  MS_INIT_COLOR(querymap->color, 255,255,0,255); /* yellow */
}

int loadQueryMap(queryMapObj *querymap)
{
  for(;;) {
    switch(msyylex()) {
      case(QUERYMAP):
        break; /* for string loads */
      case(COLOR):
        if(loadColor(&(querymap->color), NULL) != MS_SUCCESS) return MS_FAILURE;
        break;
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadQueryMap()");
        return(-1);
      case(END):
        return(0);
        break;
      case(SIZE):
        if(getInteger(&(querymap->width)) == -1) return(-1);
        if(getInteger(&(querymap->height)) == -1) return(-1);
        break;
      case(STATUS):
        if((querymap->status = getSymbol(2, MS_ON,MS_OFF)) == -1) return(-1);
        break;
      case(STYLE):
      case(TYPE):
        if((querymap->style = getSymbol(3, MS_NORMAL,MS_HILITE,MS_SELECTED)) == -1) return(-1);
        break;
      default:
        if(strlen(msyystring_buffer) > 0) {
          msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadQueryMap()", msyystring_buffer, msyylineno);
          return(-1);
        } else {
          return(0); /* end of a string, not an error */
        }
    }
  }
}

int msUpdateQueryMapFromString(queryMapObj *querymap, char *string, int url_string)
{
  if(!querymap || !string) return MS_FAILURE;

  msAcquireLock( TLOCK_PARSER );

  if(url_string)
    msyystate = MS_TOKENIZE_URL_STRING;
  else
    msyystate = MS_TOKENIZE_STRING;
  msyystring = string;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyylineno = 1; /* start at line 1 */

  if(loadQueryMap(querymap) == -1) {
    msReleaseLock( TLOCK_PARSER );
    return MS_FAILURE; /* parse error */;
  }
  msReleaseLock( TLOCK_PARSER );

  msyylex_destroy();
  return MS_SUCCESS;
}

static void writeQueryMap(FILE *stream, int indent, queryMapObj *querymap)
{
  colorObj c;

  indent++;
  writeBlockBegin(stream, indent, "QUERYMAP");
  MS_INIT_COLOR(c,255,255,0,255);
  writeColor(stream, indent, "COLOR",  &c, &(querymap->color));
  writeDimension(stream, indent, "SIZE", querymap->width, querymap->height, NULL, NULL);
  writeKeyword(stream, indent, "STATUS", querymap->status, 2, MS_ON, "ON", MS_OFF, "OFF");
  writeKeyword(stream, indent, "STYLE", querymap->style, 3, MS_NORMAL, "NORMAL", MS_HILITE, "HILITE", MS_SELECTED, "SELECTED");
  writeBlockEnd(stream, indent, "QUERYMAP");
  writeLineFeed(stream);
}

char* msWriteQueryMapToString(queryMapObj *querymap)
{
  msIOContext  context;
  msIOBuffer buffer;

  context.label = NULL;
  context.write_channel = MS_TRUE;
  context.readWriteFunc = msIO_bufferWrite;
  context.cbData = &buffer;
  buffer.data = NULL;
  buffer.data_len = 0;
  buffer.data_offset = 0;

  msIO_installHandlers( NULL, &context, NULL );

  writeQueryMap(stdout, -1, querymap);
  msIO_bufferWrite( &buffer, "", 1 );

  msIO_installHandlers( NULL, NULL, NULL );

  return (char*)buffer.data;
}

/*
** Initialize a webObj structure
*/
void initWeb(webObj *web)
{
  web->extent.minx = web->extent.miny = web->extent.maxx = web->extent.maxy = -1.0;
  web->template = NULL;
  web->header = web->footer = NULL;
  web->error =  web->empty = NULL;
  web->mintemplate = web->maxtemplate = NULL;
  web->minscaledenom = web->maxscaledenom = -1;
  web->log = NULL;
  web->imagepath = msStrdup("");
  web->temppath = NULL;
  web->imageurl = msStrdup("");

  initHashTable(&(web->metadata));
  initHashTable(&(web->validation));

  web->map = NULL;
  web->queryformat = msStrdup("text/html");
  web->legendformat = msStrdup("text/html");
  web->browseformat = msStrdup("text/html");
}

void freeWeb(webObj *web)
{
  msFree(web->template);
  msFree(web->header);
  msFree(web->footer);
  msFree(web->error);
  msFree(web->empty);
  msFree(web->maxtemplate);
  msFree(web->mintemplate);
  msFree(web->log);
  msFree(web->imagepath);
  msFree(web->temppath);
  msFree(web->imageurl);
  msFree(web->queryformat);
  msFree(web->legendformat);
  msFree(web->browseformat);
  if(&(web->metadata)) msFreeHashItems(&(web->metadata));
  if(&(web->validation)) msFreeHashItems(&(web->validation));
}

static void writeWeb(FILE *stream, int indent, webObj *web)
{
  indent++;
  writeBlockBegin(stream, indent, "WEB");
  writeString(stream, indent, "BROWSEFORMAT", "text/html", web->browseformat);
  writeString(stream, indent, "EMPTY", NULL, web->empty);
  writeString(stream, indent, "ERROR", NULL, web->error);
  writeExtent(stream, indent, "EXTENT", web->extent);
  writeString(stream, indent, "FOOTER", NULL, web->footer);
  writeString(stream, indent, "HEADER", NULL, web->header);
  writeString(stream, indent, "IMAGEPATH", "", web->imagepath);
  writeString(stream, indent, "TEMPPATH", NULL, web->temppath);
  writeString(stream, indent, "IMAGEURL", "", web->imageurl);
  writeString(stream, indent, "LEGENDFORMAT", "text/html", web->legendformat);
  writeString(stream, indent, "LOG", NULL, web->log);
  writeNumber(stream, indent, "MAXSCALEDENOM", -1, web->maxscaledenom);
  writeString(stream, indent, "MAXTEMPLATE", NULL, web->maxtemplate);
  writeHashTable(stream, indent, "METADATA", &(web->metadata));
  writeNumber(stream, indent, "MINSCALEDENOM", -1, web->minscaledenom);
  writeString(stream, indent, "MINTEMPLATE", NULL, web->mintemplate);
  writeString(stream, indent, "QUERYFORMAT", "text/html", web->queryformat);
  writeString(stream, indent, "TEMPLATE", NULL, web->template);
  writeHashTable(stream, indent, "VALIDATION", &(web->validation));
  writeBlockEnd(stream, indent, "WEB");
  writeLineFeed(stream);
}

char* msWriteWebToString(webObj *web)
{
  msIOContext  context;
  msIOBuffer buffer;

  context.label = NULL;
  context.write_channel = MS_TRUE;
  context.readWriteFunc = msIO_bufferWrite;
  context.cbData = &buffer;
  buffer.data = NULL;
  buffer.data_len = 0;
  buffer.data_offset = 0;

  msIO_installHandlers( NULL, &context, NULL );

  writeWeb(stdout, -1, web);
  msIO_bufferWrite( &buffer, "", 1 );

  msIO_installHandlers( NULL, NULL, NULL );

  return (char*)buffer.data;
}

int loadWeb(webObj *web, mapObj *map)
{
  web->map = (mapObj *)map;

  for(;;) {
    switch(msyylex()) {
      case(BROWSEFORMAT): /* change to use validation in 6.0 */
        free(web->browseformat);
        web->browseformat = NULL; /* there is a default */
        if(getString(&web->browseformat) == MS_FAILURE) return(-1);
        break;
      case(EMPTY):
        if(getString(&web->empty) == MS_FAILURE) return(-1);
        break;
      case(WEB):
        break; /* for string loads */
      case(EOF):
        msSetError(MS_EOFERR, NULL, "loadWeb()");
        return(-1);
      case(END):
        return(0);
        break;
      case(ERROR):
        if(getString(&web->error) == MS_FAILURE) return(-1);
        break;
      case(EXTENT):
        if(getDouble(&(web->extent.minx)) == -1) return(-1);
        if(getDouble(&(web->extent.miny)) == -1) return(-1);
        if(getDouble(&(web->extent.maxx)) == -1) return(-1);
        if(getDouble(&(web->extent.maxy)) == -1) return(-1);
        if (!MS_VALID_EXTENT(web->extent)) {
          msSetError(MS_MISCERR, "Given web extent is invalid. Check that it is in the form: minx, miny, maxx, maxy", "loadWeb()");
          return(-1);
        }
        break;
      case(FOOTER):
        if(getString(&web->footer) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(web->footer, msLookupHashTable(&(web->validation), "footer"), map->templatepattern, NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based FOOTER configuration failed pattern validation." , "loadWeb()");
            msFree(web->footer);
            web->footer=NULL;
            return(-1);
          }
        }
        break;
      case(HEADER):
        if(getString(&web->header) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(web->header, msLookupHashTable(&(web->validation), "header"), map->templatepattern, NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based HEADER configuration failed pattern validation." , "loadWeb()");
            msFree(web->header);
            web->header=NULL;
            return(-1);
          }
        }
        break;
      case(IMAGEPATH):
        if(getString(&web->imagepath) == MS_FAILURE) return(-1);
        break;
      case(TEMPPATH):
        if(getString(&web->temppath) == MS_FAILURE) return(-1);
        break;
      case(IMAGEURL):
        if(getString(&web->imageurl) == MS_FAILURE) return(-1);
        break;
      case(LEGENDFORMAT): /* change to use validation in 6.0 */
        free(web->legendformat);
        web->legendformat = NULL; /* there is a default */
        if(getString(&web->legendformat) == MS_FAILURE) return(-1);
        break;
      case(LOG):
        if(getString(&web->log) == MS_FAILURE) return(-1);
        break;
      case(MAXSCALE):
      case(MAXSCALEDENOM):
        if(getDouble(&web->maxscaledenom) == -1) return(-1);
        break;
      case(MAXTEMPLATE):
        if(getString(&web->maxtemplate) == MS_FAILURE) return(-1);
        break;
      case(METADATA):
        if(loadHashTable(&(web->metadata)) != MS_SUCCESS) return(-1);
        break;
      case(MINSCALE):
      case(MINSCALEDENOM):
        if(getDouble(&web->minscaledenom) == -1) return(-1);
        break;
      case(MINTEMPLATE):
        if(getString(&web->mintemplate) == MS_FAILURE) return(-1);
        break;
      case(QUERYFORMAT): /* change to use validation in 6.0 */
        free(web->queryformat);
        web->queryformat = NULL; /* there is a default */
        if(getString(&web->queryformat) == MS_FAILURE) return(-1);
        break;
      case(TEMPLATE):
        if(getString(&web->template) == MS_FAILURE) return(-1); /* getString() cleans up previously allocated string */
        if(msyysource == MS_URL_TOKENS) {
          if(msValidateParameter(web->template, msLookupHashTable(&(web->validation), "template"), map->templatepattern, NULL, NULL) != MS_SUCCESS) {
            msSetError(MS_MISCERR, "URL-based TEMPLATE configuration failed pattern validation." , "loadWeb()");
            msFree(web->template);
            web->template=NULL;
            return(-1);
          }
        }
        break;
      case(VALIDATION):
        if(loadHashTable(&(web->validation)) != MS_SUCCESS) return(-1);
        break;
      default:
        if(strlen(msyystring_buffer) > 0) {
          msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "loadWeb()", msyystring_buffer, msyylineno);
          return(-1);
        } else {
          return(0); /* end of a string, not an error */
        }
    }
  }
}

int msUpdateWebFromString(webObj *web, char *string, int url_string)
{
  if(!web || !string) return MS_FAILURE;

  msAcquireLock( TLOCK_PARSER );

  if(url_string)
    msyystate = MS_TOKENIZE_URL_STRING;
  else
    msyystate = MS_TOKENIZE_STRING;
  msyystring = string;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyylineno = 1; /* start at line 1 */

  if(loadWeb(web, web->map) == -1) {
    msReleaseLock( TLOCK_PARSER );
    return MS_FAILURE; /* parse error */;
  }
  msReleaseLock( TLOCK_PARSER );

  msyylex_destroy();
  return MS_SUCCESS;
}

/*
** Initialize, load and free a mapObj structure
**
** This really belongs in mapobject.c, but currently it also depends on
** lots of other init methods in this file.
*/
int initMap(mapObj *map)
{
  int i=0;
  MS_REFCNT_INIT(map);

  map->debug = (int)msGetGlobalDebugLevel();

  /* Set maxlayers = 0, layers[] and layerorder[] will be allocated as needed,
   * on the first call to msGrowMapLayers()
   */
  map->numlayers = 0;
  map->maxlayers = 0;
  map->layers = NULL;
  map->layerorder = NULL; /* used to modify the order in which the layers are drawn */

  map->status = MS_ON;
  map->name = msStrdup("MS");
  map->extent.minx = map->extent.miny = map->extent.maxx = map->extent.maxy = -1.0;

  map->scaledenom = -1.0;
  map->resolution = MS_DEFAULT_RESOLUTION; /* pixels per inch */
  map->defresolution = MS_DEFAULT_RESOLUTION; /* pixels per inch */

  map->height = map->width = -1;
  map->maxsize = MS_MAXIMAGESIZE_DEFAULT;

  map->gt.need_geotransform = MS_FALSE;
  map->gt.rotation_angle = 0.0;

  map->units = MS_METERS;
  map->cellsize = 0;
  map->shapepath = NULL;
  map->mappath = NULL;

  MS_INIT_COLOR(map->imagecolor, 255,255,255,255); /* white */

  map->numoutputformats = 0;
  map->outputformatlist = NULL;
  map->outputformat = NULL;

  /* map->configoptions = msCreateHashTable();; */
  initHashTable(&(map->configoptions));

  map->imagetype = NULL;

  map->palette.numcolors = 0;

  map->transparent = MS_NOOVERRIDE;
  map->interlace = MS_NOOVERRIDE;
  map->imagequality = MS_NOOVERRIDE;

  for(i=0; i<MS_MAX_LABEL_PRIORITY; i++) {
    map->labelcache.slots[i].labels = NULL; /* cache is initialize at draw time */
    map->labelcache.slots[i].cachesize = 0;
    map->labelcache.slots[i].numlabels = 0;
    map->labelcache.slots[i].markers = NULL;
    map->labelcache.slots[i].markercachesize = 0;
    map->labelcache.slots[i].nummarkers = 0;
  }

  map->fontset.filename = NULL;
  map->fontset.numfonts = 0;

  /* map->fontset.fonts = NULL; */
  initHashTable(&(map->fontset.fonts));

  msInitSymbolSet(&map->symbolset);
  map->symbolset.fontset =  &(map->fontset);
  map->symbolset.map = map;

  initLegend(&map->legend);
  initScalebar(&map->scalebar);
  initWeb(&map->web);
  initReferenceMap(&map->reference);
  initQueryMap(&map->querymap);

#ifdef USE_PROJ
  if(msInitProjection(&(map->projection)) == -1)
    return(-1);
  if(msInitProjection(&(map->latlon)) == -1)
    return(-1);

  /* initialize a default "geographic" projection */
  map->latlon.numargs = 2;
  map->latlon.args[0] = msStrdup("proj=latlong");
  map->latlon.args[1] = msStrdup("ellps=WGS84"); /* probably want a different ellipsoid */
  if(msProcessProjection(&(map->latlon)) == -1) return(-1);
#endif

  map->templatepattern = map->datapattern = NULL;

  /* Encryption key information - see mapcrypto.c */
  map->encryption_key_loaded = MS_FALSE;

  msInitQuery(&(map->query));

#ifdef USE_V8_MAPSCRIPT
  map->v8context = NULL;
#endif

  return(0);
}

/*
** Ensure there is at least one free entry in the layers and layerorder
** arrays of this mapObj. Grow the allocated layers/layerorder arrays if
** necessary and allocate a new layer for layers[numlayers] if there is
** not already one, setting its contents to all zero bytes (i.e. does not
** call initLayer() on it).
**
** This function is safe to use for the initial allocation of the layers[]
** and layerorder[] arrays as well (i.e. when maxlayers==0 and layers==NULL)
**
** Returns a reference to the new layerObj on success, NULL on error.
*/
layerObj *msGrowMapLayers( mapObj *map )
{
  /* Do we need to increase the size of layers/layerorder by
   * MS_LAYER_ALLOCSIZE?
   */
  if (map->numlayers == map->maxlayers) {
    layerObj **newLayersPtr;
    int *newLayerorderPtr;
    int i, newsize;

    newsize = map->maxlayers + MS_LAYER_ALLOCSIZE;

    /* Alloc/realloc layers */
    newLayersPtr = (layerObj**)realloc(map->layers,
                                       newsize*sizeof(layerObj*));
    MS_CHECK_ALLOC(newLayersPtr, newsize*sizeof(layerObj*), NULL);

    map->layers = newLayersPtr;

    /* Alloc/realloc layerorder */
    newLayerorderPtr = (int *)realloc(map->layerorder,
                                      newsize*sizeof(int));
    MS_CHECK_ALLOC(newLayerorderPtr, newsize*sizeof(int), NULL);

    map->layerorder = newLayerorderPtr;

    map->maxlayers = newsize;
    for(i=map->numlayers; i<map->maxlayers; i++) {
      map->layers[i] = NULL;
      map->layerorder[i] = 0;
    }
  }

  if (map->layers[map->numlayers]==NULL) {
    map->layers[map->numlayers]=(layerObj*)calloc(1,sizeof(layerObj));
    MS_CHECK_ALLOC(map->layers[map->numlayers], sizeof(layerObj), NULL);
  }

  return map->layers[map->numlayers];
}


int msFreeLabelCacheSlot(labelCacheSlotObj *cacheslot)
{
  int i, j;

  /* free the labels */
  if (cacheslot->labels) {
    for(i=0; i<cacheslot->numlabels; i++) {

      for(j=0; j<cacheslot->labels[i].numtextsymbols; j++) {
        freeTextSymbol(cacheslot->labels[i].textsymbols[j]);
        free(cacheslot->labels[i].textsymbols[j]);
      }
      msFree(cacheslot->labels[i].textsymbols);

#ifdef include_deprecated
      for(j=0; j<cacheslot->labels[i].numstyles; j++) freeStyle(&(cacheslot->labels[i].styles[j]));
      msFree(cacheslot->labels[i].styles);
#endif
      if(cacheslot->labels[i].leaderline) {
        msFree(cacheslot->labels[i].leaderline->point);
        msFree(cacheslot->labels[i].leaderline);
        msFree(cacheslot->labels[i].leaderbbox);
      }
    }
  }
  msFree(cacheslot->labels);
  cacheslot->labels = NULL;
  cacheslot->cachesize = 0;
  cacheslot->numlabels = 0;

  msFree(cacheslot->markers);
  cacheslot->markers = NULL;
  cacheslot->markercachesize = 0;
  cacheslot->nummarkers = 0;

  return(MS_SUCCESS);
}

int msFreeLabelCache(labelCacheObj *cache)
{
  int p;

  for(p=0; p<MS_MAX_LABEL_PRIORITY; p++) {
    if (msFreeLabelCacheSlot(&(cache->slots[p])) != MS_SUCCESS)
      return MS_FAILURE;
  }

  cache->num_allocated_rendered_members = cache->num_rendered_members = 0;
  msFree(cache->rendered_text_symbols);

  return MS_SUCCESS;
}

int msInitLabelCacheSlot(labelCacheSlotObj *cacheslot)
{

  if(cacheslot->labels || cacheslot->markers)
    msFreeLabelCacheSlot(cacheslot);

  cacheslot->labels = (labelCacheMemberObj *)malloc(sizeof(labelCacheMemberObj)*MS_LABELCACHEINITSIZE);
  MS_CHECK_ALLOC(cacheslot->labels, sizeof(labelCacheMemberObj)*MS_LABELCACHEINITSIZE, MS_FAILURE);

  cacheslot->cachesize = MS_LABELCACHEINITSIZE;
  cacheslot->numlabels = 0;

  cacheslot->markers = (markerCacheMemberObj *)malloc(sizeof(markerCacheMemberObj)*MS_LABELCACHEINITSIZE);
  MS_CHECK_ALLOC(cacheslot->markers, sizeof(markerCacheMemberObj)*MS_LABELCACHEINITSIZE, MS_FAILURE);

  cacheslot->markercachesize = MS_LABELCACHEINITSIZE;
  cacheslot->nummarkers = 0;

  return(MS_SUCCESS);
}

int msInitLabelCache(labelCacheObj *cache)
{
  int p;

  for(p=0; p<MS_MAX_LABEL_PRIORITY; p++) {
    if (msInitLabelCacheSlot(&(cache->slots[p])) != MS_SUCCESS)
      return MS_FAILURE;
  }
  cache->gutter = 0;
  cache->num_allocated_rendered_members = cache->num_rendered_members = 0;
  cache->rendered_text_symbols = NULL;

  return MS_SUCCESS;
}

static void writeMap(FILE *stream, int indent, mapObj *map)
{
  int i;
  colorObj c;

  writeBlockBegin(stream, indent, "MAP");
  writeNumber(stream, indent, "ANGLE", 0, map->gt.rotation_angle);
  writeHashTableInline(stream, indent, "CONFIG", &(map->configoptions));
  writeString(stream, indent, "DATAPATTERN", NULL, map->datapattern); /* depricated */
  writeNumber(stream, indent, "DEBUG", 0, map->debug);
  writeNumber(stream, indent, "DEFRESOLUTION", 72.0, map->defresolution);
  writeExtent(stream, indent, "EXTENT", map->extent);
  writeString(stream, indent, "FONTSET", NULL, map->fontset.filename);
  MS_INIT_COLOR(c,255,255,255,255);
  writeColor(stream, indent, "IMAGECOLOR", &c, &(map->imagecolor));
  writeString(stream, indent, "IMAGETYPE", NULL, map->imagetype);
  writeKeyword(stream, indent, "INTERLACE", map->interlace, 2, MS_TRUE, "TRUE", MS_FALSE, "FALSE");
  writeNumber(stream, indent, "MAXSIZE", MS_MAXIMAGESIZE_DEFAULT, map->maxsize);
  writeString(stream, indent, "NAME", NULL, map->name);
  writeNumber(stream, indent, "RESOLUTION", 72.0, map->resolution);
  writeString(stream, indent, "SHAPEPATH", NULL, map->shapepath);
  writeDimension(stream, indent, "SIZE", map->width, map->height, NULL, NULL);
  writeKeyword(stream, indent, "STATUS", map->status, 2, MS_ON, "ON", MS_OFF, "OFF");
  writeString(stream, indent, "SYMBOLSET", NULL, map->symbolset.filename);
  writeString(stream, indent, "TEMPLATEPATTERN", NULL, map->templatepattern); /* depricated */
  writeKeyword(stream, indent, "TRANSPARENT", map->transparent, 2, MS_TRUE, "TRUE", MS_FALSE, "FALSE");
  writeKeyword(stream, indent, "UNITS", map->units, 7, MS_INCHES, "INCHES", MS_FEET ,"FEET", MS_MILES, "MILES", MS_METERS, "METERS", MS_KILOMETERS, "KILOMETERS", MS_NAUTICALMILES, "NAUTICALMILES", MS_DD, "DD");
  writeLineFeed(stream);

  writeOutputformat(stream, indent, map);

  /* write symbol with INLINE tag in mapfile */
  for(i=0; i<map->symbolset.numsymbols; i++) {
    if(map->symbolset.symbol[i]->inmapfile) writeSymbol(map->symbolset.symbol[i], stream);
  }

  writeProjection(stream, indent, &(map->projection));

  writeLegend(stream, indent, &(map->legend));
  writeQueryMap(stream, indent, &(map->querymap));
  writeReferenceMap(stream, indent, &(map->reference));
  writeScalebar(stream, indent, &(map->scalebar));
  writeWeb(stream, indent, &(map->web));

  for(i=0; i<map->numlayers; i++)
    writeLayer(stream, indent, GET_LAYER(map, map->layerorder[i]));

  writeBlockEnd(stream, indent, "MAP");
}

char* msWriteMapToString(mapObj *map)
{
  msIOContext  context;
  msIOBuffer buffer;

  context.label = NULL;
  context.write_channel = MS_TRUE;
  context.readWriteFunc = msIO_bufferWrite;
  context.cbData = &buffer;
  buffer.data = NULL;
  buffer.data_len = 0;
  buffer.data_offset = 0;

  msIO_installHandlers( NULL, &context, NULL );

  writeMap(stdout, 0, map);
  msIO_bufferWrite( &buffer, "", 1 );

  msIO_installHandlers( NULL, NULL, NULL );

  return (char*)buffer.data;
}

int msSaveMap(mapObj *map, char *filename)
{
  FILE *stream;
  char szPath[MS_MAXPATHLEN];
  
  if(!map) {
    msSetError(MS_MISCERR, "Map is undefined.", "msSaveMap()");
    return(-1);
  }

  if(!filename) {
    msSetError(MS_MISCERR, "Filename is undefined.", "msSaveMap()");
    return(-1);
  }

  stream = fopen(msBuildPath(szPath, map->mappath, filename), "w");
  if(!stream) {
    msSetError(MS_IOERR, "(%s)", "msSaveMap()", filename);
    return(-1);
  }

  writeMap(stream, 0, map);
  fclose(stream);

  return(0);
}

static int loadMapInternal(mapObj *map)
{
  int foundMapToken=MS_FALSE;
  int foundBomToken = MS_FALSE;
  int token;

  for(;;) {

    token = msyylex();

    if(!foundBomToken && token == BOM) {
      foundBomToken = MS_TRUE;
      if(!foundMapToken) {
        continue; /*skip a leading bom*/
      }
    }
    if(!foundMapToken && token != MAP) {
      msSetError(MS_IDENTERR, "First token must be MAP, this doesn't look like a mapfile.", "msLoadMap()");
      return(MS_FAILURE);
    }

    switch(token) {

      case(CONFIG): {
        char *key=NULL, *value=NULL;

        if( getString(&key) == MS_FAILURE )
          return MS_FAILURE;

        if( getString(&value) == MS_FAILURE ) {
          free(key);
          return MS_FAILURE;
        }

        if (msSetConfigOption( map, key, value ) == MS_FAILURE) {
          free(key);
          free(value);
          return MS_FAILURE;
        }

        free( key );
        free( value );
      }
      break;

      case(DATAPATTERN):
        if(getString(&map->datapattern) == MS_FAILURE) return MS_FAILURE;
        break;
      case(DEBUG):
        if((map->debug = getSymbol(3, MS_ON,MS_OFF, MS_NUMBER)) == -1) return MS_FAILURE;
        if(map->debug == MS_NUMBER) map->debug = (int) msyynumber;
        break;
      case(END):
        if(msyyin) {
          fclose(msyyin);
          msyyin = NULL;
        }

        /*** Make config options current ***/
        msApplyMapConfigOptions( map );

        /*** Compute rotated extent info if applicable ***/
        msMapComputeGeotransform( map );

        /*** OUTPUTFORMAT related setup ***/
        if( msPostMapParseOutputFormatSetup( map ) == MS_FAILURE )
          return MS_FAILURE;

        if(loadSymbolSet(&(map->symbolset), map) == -1) return MS_FAILURE;

        if (resolveSymbolNames(map) == MS_FAILURE) return MS_FAILURE;


        if(msLoadFontSet(&(map->fontset), map) == -1) return MS_FAILURE;

        return MS_SUCCESS;
        break;
      case(EOF):
        msSetError(MS_EOFERR, NULL, "msLoadMap()");
        return MS_FAILURE;
      case(EXTENT): {
        if(getDouble(&(map->extent.minx)) == -1) return MS_FAILURE;
        if(getDouble(&(map->extent.miny)) == -1) return MS_FAILURE;
        if(getDouble(&(map->extent.maxx)) == -1) return MS_FAILURE;
        if(getDouble(&(map->extent.maxy)) == -1) return MS_FAILURE;
        if (!MS_VALID_EXTENT(map->extent)) {
          msSetError(MS_MISCERR, "Given map extent is invalid. Check that it " \
                     "is in the form: minx, miny, maxx, maxy", "loadMapInternal()");
          return MS_FAILURE;
        }
      }
      break;
      case(ANGLE): {
        double rotation_angle;
        if(getDouble(&(rotation_angle)) == -1) return MS_FAILURE;
        msMapSetRotation( map, rotation_angle );
      }
      break;
      case(TEMPLATEPATTERN):
        if(getString(&map->templatepattern) == MS_FAILURE) return MS_FAILURE;
        break;
      case(FONTSET):
        if(getString(&map->fontset.filename) == MS_FAILURE) return MS_FAILURE;
        break;
      case(IMAGECOLOR):
        if(loadColor(&(map->imagecolor), NULL) != MS_SUCCESS) return MS_FAILURE;
        break;
      case(IMAGEQUALITY):
        if(getInteger(&(map->imagequality)) == -1) return MS_FAILURE;
        break;
      case(IMAGETYPE):
        map->imagetype = getToken();
        break;
      case(INTERLACE):
        if((map->interlace = getSymbol(2, MS_ON,MS_OFF)) == -1) return MS_FAILURE;
        break;
      case(LATLON):
        msFreeProjection(&map->latlon);
        if(loadProjection(&map->latlon) == -1) return MS_FAILURE;
        break;
      case(LAYER):
        if(msGrowMapLayers(map) == NULL)
          return MS_FAILURE;
        if(initLayer((GET_LAYER(map, map->numlayers)), map) == -1) return MS_FAILURE;
        if(loadLayer((GET_LAYER(map, map->numlayers)), map) == -1) return MS_FAILURE;
        GET_LAYER(map, map->numlayers)->index = map->numlayers; /* save the index */
        /* Update the layer order list with the layer's index. */
        map->layerorder[map->numlayers] = map->numlayers;
        map->numlayers++;
        break;
      case(OUTPUTFORMAT):
        if(loadOutputFormat(map) == -1) return MS_FAILURE;
        break;
      case(LEGEND):
        if(loadLegend(&(map->legend), map) == -1) return MS_FAILURE;
        break;
      case(MAP):
        foundMapToken = MS_TRUE;
        break;
      case(MAXSIZE):
        if(getInteger(&(map->maxsize)) == -1) return MS_FAILURE;
        break;
      case(NAME):
        free(map->name);
        map->name = NULL; /* erase default */
        if(getString(&map->name) == MS_FAILURE) return MS_FAILURE;
        break;
      case(PROJECTION):
        if(loadProjection(&map->projection) == -1) return MS_FAILURE;
        break;
      case(QUERYMAP):
        if(loadQueryMap(&(map->querymap)) == -1) return MS_FAILURE;
        break;
      case(REFERENCE):
        if(loadReferenceMap(&(map->reference), map) == -1) return MS_FAILURE;
        break;
      case(RESOLUTION):
        if(getDouble(&(map->resolution)) == -1) return MS_FAILURE;
        break;
      case(DEFRESOLUTION):
        if(getDouble(&(map->defresolution)) == -1) return MS_FAILURE;
        break;
      case(SCALE):
      case(SCALEDENOM):
        if(getDouble(&(map->scaledenom)) == -1) return MS_FAILURE;
        break;
      case(SCALEBAR):
        if(loadScalebar(&(map->scalebar)) == -1) return MS_FAILURE;
        break;
      case(SHAPEPATH):
        if(getString(&map->shapepath) == MS_FAILURE) return MS_FAILURE;
        break;
      case(SIZE):
        if(getInteger(&(map->width)) == -1) return MS_FAILURE;
        if(getInteger(&(map->height)) == -1) return MS_FAILURE;
        break;
      case(STATUS):
        if((map->status = getSymbol(2, MS_ON,MS_OFF)) == -1) return MS_FAILURE;
        break;
      case(SYMBOL):
        if(msGrowSymbolSet(&(map->symbolset)) == NULL)
          return MS_FAILURE;
        if((loadSymbol(map->symbolset.symbol[map->symbolset.numsymbols], map->mappath) == -1)) return MS_FAILURE;
        map->symbolset.symbol[map->symbolset.numsymbols]->inmapfile = MS_TRUE;
        map->symbolset.numsymbols++;
        break;
      case(SYMBOLSET):
        if(getString(&map->symbolset.filename) == MS_FAILURE) return MS_FAILURE;
        break;
      case(TRANSPARENT):
        if((map->transparent = getSymbol(2, MS_ON,MS_OFF)) == -1) return MS_FAILURE;
        break;
      case(UNITS):
        if((map->units = getSymbol(7, MS_INCHES,MS_FEET,MS_MILES,MS_METERS,MS_KILOMETERS,MS_NAUTICALMILES,MS_DD)) == -1) return MS_FAILURE;
        break;
      case(WEB):
        if(loadWeb(&(map->web), map) == -1) return MS_FAILURE;
        break;
      default:
        msSetError(MS_IDENTERR, "Parsing error near (%s):(line %d)", "msLoadMap()", msyystring_buffer, msyylineno);
        return MS_FAILURE;
    }
  } /* next token */
}

/*
** Sets up string-based mapfile loading and calls loadMapInternal to do the work.
*/
mapObj *msLoadMapFromString(char *buffer, char *new_mappath)
{
  mapObj *map;
  struct mstimeval starttime, endtime;
  char szPath[MS_MAXPATHLEN], szCWDPath[MS_MAXPATHLEN];
  char *mappath=NULL;
  int debuglevel;

  debuglevel = (int)msGetGlobalDebugLevel();

  if (debuglevel >= MS_DEBUGLEVEL_TUNING) {
    /* In debug mode, track time spent loading/parsing mapfile. */
    msGettimeofday(&starttime, NULL);
  }

  if(!buffer) {
    msSetError(MS_MISCERR, "No buffer to load.", "msLoadMapFromString()");
    return(NULL);
  }

  /*
  ** Allocate mapObj structure
  */
  map = (mapObj *)calloc(sizeof(mapObj),1);
  MS_CHECK_ALLOC(map, sizeof(mapObj), NULL);

  if(initMap(map) == -1) { /* initialize this map */
    msFree(map);
    return(NULL);
  }

  msAcquireLock( TLOCK_PARSER ); /* might need to move this lock a bit higher, yup (bug 2108) */

  msyystate = MS_TOKENIZE_STRING;
  msyystring = buffer;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyylineno = 1; /* start at line 1 (do lines mean anything here?) */

  /* If new_mappath is provided then use it, otherwise use the CWD */
  if(NULL == getcwd(szCWDPath, MS_MAXPATHLEN)) {
    msSetError(MS_MISCERR, "getcwd() returned a too long path", "msLoadMapFromString()");
    msFreeMap(map);
    msReleaseLock( TLOCK_PARSER );
  }
  if (new_mappath) {
    mappath = msStrdup(new_mappath);
    map->mappath = msStrdup(msBuildPath(szPath, szCWDPath, mappath));
  } else
    map->mappath = msStrdup(szCWDPath);

  msyybasepath = map->mappath; /* for INCLUDEs */

  if(loadMapInternal(map) != MS_SUCCESS) {
    msFreeMap(map);
    msReleaseLock( TLOCK_PARSER );
    if(mappath != NULL) free(mappath);
    return NULL;
  }

  if (mappath != NULL) free(mappath);
  msyylex_destroy();

  msReleaseLock( TLOCK_PARSER );

  if (debuglevel >= MS_DEBUGLEVEL_TUNING) {
    /* In debug mode, report time spent loading/parsing mapfile. */
    msGettimeofday(&endtime, NULL);
    msDebug("msLoadMap(): %.3fs\n",
            (endtime.tv_sec+endtime.tv_usec/1.0e6)-
            (starttime.tv_sec+starttime.tv_usec/1.0e6) );
  }

  if (resolveSymbolNames(map) == MS_FAILURE) return NULL;

  return map;
}

/*
** Sets up file-based mapfile loading and calls loadMapInternal to do the work.
*/
mapObj *msLoadMap(char *filename, char *new_mappath)
{
  mapObj *map;
  struct mstimeval starttime, endtime;
  char szPath[MS_MAXPATHLEN], szCWDPath[MS_MAXPATHLEN];
  int debuglevel;

  debuglevel = (int)msGetGlobalDebugLevel();

  if (debuglevel >= MS_DEBUGLEVEL_TUNING) {
    /* In debug mode, track time spent loading/parsing mapfile. */
    msGettimeofday(&starttime, NULL);
  }

  if(!filename) {
    msSetError(MS_MISCERR, "Filename is undefined.", "msLoadMap()");
    return(NULL);
  }

  if(getenv("MS_MAPFILE_PATTERN")) { /* user override */
    if(msEvalRegex(getenv("MS_MAPFILE_PATTERN"), filename) != MS_TRUE) {
      msSetError(MS_REGEXERR, "MS_MAPFILE_PATTERN validation failed." , "msLoadMap()");
      return(NULL);
    }
  } else { /* check the default */
    if(msEvalRegex(MS_DEFAULT_MAPFILE_PATTERN, filename) != MS_TRUE) {
      msSetError(MS_REGEXERR, "MS_DEFAULT_MAPFILE_PATTERN validation failed." , "msLoadMap()");
      return(NULL);
    }
  }

  /*
  ** Allocate mapObj structure
  */
  map = (mapObj *)calloc(sizeof(mapObj),1);
  MS_CHECK_ALLOC(map, sizeof(mapObj), NULL);

  if(initMap(map) == -1) { /* initialize this map */
    msFree(map);
    return(NULL);
  }

  msAcquireLock( TLOCK_PARSER );  /* Steve: might need to move this lock a bit higher; Umberto: done */

#ifdef USE_XMLMAPFILE
  /* If the mapfile is an xml mapfile, transform it */
  if ((getenv("MS_XMLMAPFILE_XSLT")) &&
      (msEvalRegex(MS_DEFAULT_XMLMAPFILE_PATTERN, filename) == MS_TRUE)) {

    msyyin = tmpfile();
    if (msyyin == NULL) {
      msSetError(MS_IOERR, "tmpfile() failed to create temporary file", "msLoadMap()");
      msReleaseLock( TLOCK_PARSER );
    }

    if (msTransformXmlMapfile(getenv("MS_XMLMAPFILE_XSLT"), filename, msyyin) != MS_SUCCESS) {
      fclose(msyyin);
      return NULL;
    }
    fseek ( msyyin , 0 , SEEK_SET );
  } else {
#endif
    if((msyyin = fopen(filename,"r")) == NULL) {
      msSetError(MS_IOERR, "(%s)", "msLoadMap()", filename);
      msReleaseLock( TLOCK_PARSER );
      return NULL;
    }
#ifdef USE_XMLMAPFILE
  }
#endif

  msyystate = MS_TOKENIZE_FILE;
  msyylex(); /* sets things up, but doesn't process any tokens */

  msyyrestart(msyyin); /* start at line begining, line 1 */
  msyylineno = 1;

  /* If new_mappath is provided then use it, otherwise use the location */
  /* of the mapfile as the default path */
  if(NULL == getcwd(szCWDPath, MS_MAXPATHLEN)) {
    msSetError(MS_MISCERR, "getcwd() returned a too long path", "msLoadMap()");
    msFreeMap(map);
    msReleaseLock( TLOCK_PARSER );
  }

  if (new_mappath)
    map->mappath = msStrdup(msBuildPath(szPath, szCWDPath, new_mappath));
  else {
    char *path = msGetPath(filename);
    map->mappath = msStrdup(msBuildPath(szPath, szCWDPath, path));
    free( path );
  }

  msyybasepath = map->mappath; /* for INCLUDEs */

  if(loadMapInternal(map) != MS_SUCCESS) {
    msFreeMap(map);
    msReleaseLock( TLOCK_PARSER );
    if( msyyin ) {
      fclose(msyyin);
      msyyin = NULL;
    }
    return NULL;
  }
  msReleaseLock( TLOCK_PARSER );

  if (debuglevel >= MS_DEBUGLEVEL_TUNING) {
    /* In debug mode, report time spent loading/parsing mapfile. */
    msGettimeofday(&endtime, NULL);
    msDebug("msLoadMap(): %.3fs\n",
            (endtime.tv_sec+endtime.tv_usec/1.0e6)-
            (starttime.tv_sec+starttime.tv_usec/1.0e6) );
  }

  return map;
}

/*
** Loads mapfile snippets via a URL (only via the CGI so don't worry about thread locks)
*/
int msUpdateMapFromURL(mapObj *map, char *variable, char *string)
{
  int i, j, k, s;
  errorObj *ms_error;

  /* make sure this configuration can be modified */
  if(msLookupHashTable(&(map->web.validation), "immutable"))
    return(MS_SUCCESS); /* fail silently */

  msyystate = MS_TOKENIZE_URL_VARIABLE; /* set lexer state and input to tokenize */
  msyystring = variable;
  msyylineno = 1;

  ms_error = msGetErrorObj();
  ms_error->code = MS_NOERR; /* init error code */

  switch(msyylex()) {
    case(MAP):
      switch(msyylex()) {
        case(CONFIG): {
          char *key=NULL, *value=NULL;
          if((getString(&key) != MS_FAILURE) && (getString(&value) != MS_FAILURE)) {
            msSetConfigOption( map, key, value );
            free( key );
            key=NULL;
            free( value );
            value=NULL;
          }
        }
        break;
        case(EXTENT):
          msyystate = MS_TOKENIZE_URL_STRING;
          msyystring = string;
          msyylex();

          if(getDouble(&(map->extent.minx)) == -1) break;
          if(getDouble(&(map->extent.miny)) == -1) break;
          if(getDouble(&(map->extent.maxx)) == -1) break;
          if(getDouble(&(map->extent.maxy)) == -1) break;
          if (!MS_VALID_EXTENT(map->extent)) {
            msSetError(MS_MISCERR, "Given map extent is invalid. Check that it is in the form: minx, miny, maxx, maxy", "msLoadMapParameterFromUrl()");
            break;
          }
          msMapComputeGeotransform( map );
          break;
        case(ANGLE): {
          double rotation_angle;
          msyystate = MS_TOKENIZE_URL_STRING;
          msyystring = string;
          msyylex();

          if(getDouble(&(rotation_angle)) == -1) break;
          msMapSetRotation( map, rotation_angle );
        }
        break;
        case(IMAGECOLOR):
          msyystate = MS_TOKENIZE_URL_STRING;
          msyystring = string;
          msyylex();

          if(loadColor(&(map->imagecolor), NULL) != MS_SUCCESS) break;
          break;
        case(IMAGETYPE):
          msyystate = MS_TOKENIZE_URL_STRING;
          msyystring = string;
          msyylex();

          /* TODO: should validate or does msPostMapParseOutputFormatSetup() do enough? */

          map->imagetype = getToken();
          msPostMapParseOutputFormatSetup( map );
          break;
        case(LAYER):
          if((s = getSymbol(2, MS_NUMBER, MS_STRING)) == -1) {
            return MS_FAILURE;
          }
          if(s == MS_STRING)
            i = msGetLayerIndex(map, msyystring_buffer);
          else
            i = (int) msyynumber;

          if(i>=map->numlayers || i<0) {
            msSetError(MS_MISCERR, "Layer to be modified not valid.", "msUpdateMapFromURL()");
            return MS_FAILURE;
          }

          /* make sure this layer can be modified */
          if(msLookupHashTable(&(GET_LAYER(map, i)->validation), "immutable"))
            return(MS_SUCCESS); /* fail silently */

          if(msyylex() == CLASS) {
            if((s = getSymbol(2, MS_NUMBER, MS_STRING)) == -1) return MS_FAILURE;
            if(s == MS_STRING)
              j = msGetClassIndex(GET_LAYER(map, i), msyystring_buffer);
            else
              j = (int) msyynumber;

            if(j>=GET_LAYER(map, i)->numclasses || j<0) {
              msSetError(MS_MISCERR, "Class to be modified not valid.", "msUpdateMapFromURL()");
              return MS_FAILURE;
            }

            /* make sure this class can be modified */
            if(msLookupHashTable(&(GET_LAYER(map, i)->class[j]->validation), "immutable"))
              return(MS_SUCCESS); /* fail silently */

            switch(msyylex()) {
              case STYLE:
                if(getInteger(&k) == -1) return MS_FAILURE;
                if(k>=GET_LAYER(map, i)->class[j]->numstyles || k<0) {
                  msSetError(MS_MISCERR, "Style to be modified not valid.", "msUpdateMapFromURL()");
                  return MS_FAILURE;
                }
                if(msUpdateStyleFromString((GET_LAYER(map, i))->class[j]->styles[k], string, MS_TRUE) != MS_SUCCESS) return MS_FAILURE;
                break;
              case LABEL:
                if(getInteger(&k) == -1) return MS_FAILURE;
                if(k>=GET_LAYER(map, i)->class[j]->numlabels || k<0) {
                  msSetError(MS_MISCERR, "Label to be modified not valid.", "msUpdateMapFromURL()");
                  return MS_FAILURE;
                }
                if(msUpdateLabelFromString((GET_LAYER(map, i))->class[j]->labels[k], string, MS_TRUE) != MS_SUCCESS) return MS_FAILURE;
                break;
              default:
                if(msUpdateClassFromString((GET_LAYER(map, i))->class[j], string, MS_TRUE) != MS_SUCCESS) return MS_FAILURE;
            }
          } else {
            if(msUpdateLayerFromString((GET_LAYER(map, i)), string, MS_TRUE) != MS_SUCCESS) return MS_FAILURE;
          }

          /* make sure any symbol names for this layer have been resolved (bug #2700) */
          for(j=0; j<GET_LAYER(map, i)->numclasses; j++) {
            for(k=0; k<GET_LAYER(map, i)->class[j]->numstyles; k++) {
              if(GET_LAYER(map, i)->class[j]->styles[k]->symbolname && GET_LAYER(map, i)->class[j]->styles[k]->symbol == 0) {
                if((GET_LAYER(map, i)->class[j]->styles[k]->symbol =  msGetSymbolIndex(&(map->symbolset), GET_LAYER(map, i)->class[j]->styles[k]->symbolname, MS_TRUE)) == -1) {
                  msSetError(MS_MISCERR, "Undefined symbol \"%s\" in class %d, style %d of layer %s.", "msUpdateMapFromURL()", GET_LAYER(map, i)->class[j]->styles[k]->symbolname, j, k, GET_LAYER(map, i)->name);
                  return MS_FAILURE;
                }
              }
              if(!MS_IS_VALID_ARRAY_INDEX(GET_LAYER(map, i)->class[j]->styles[k]->symbol, map->symbolset.numsymbols)) {
                msSetError(MS_MISCERR, "Invalid symbol index in class %d, style %d of layer %s.", "msUpdateMapFromURL()", j, k, GET_LAYER(map, i)->name);
                return MS_FAILURE;
              }
            }
          }

          break;
        case(LEGEND):
          if(msyylex() == LABEL) {
            return msUpdateLabelFromString(&map->legend.label, string, MS_TRUE);
          } else {
            return msUpdateLegendFromString(&(map->legend), string, MS_TRUE);
          }
        case(PROJECTION):
          msLoadProjectionString(&(map->projection), string);
          break;
        case(QUERYMAP):
          return msUpdateQueryMapFromString(&(map->querymap), string, MS_TRUE);
        case(REFERENCE):
          return msUpdateReferenceMapFromString(&(map->reference), string, MS_TRUE);
        case(RESOLUTION):
          msyystate = MS_TOKENIZE_URL_STRING;
          msyystring = string;
          msyylex();

          if(getDouble(&(map->resolution)) == -1) break;
          break;
        case(DEFRESOLUTION):
          msyystate = MS_TOKENIZE_URL_STRING;
          msyystring = string;
          msyylex();

          if(getDouble(&(map->defresolution)) == -1) break;
          break;
        case(SCALEBAR):
          return msUpdateScalebarFromString(&(map->scalebar), string, MS_TRUE);
        case(SIZE):
          msyystate = MS_TOKENIZE_URL_STRING;
          msyystring = string;
          msyylex();

          if(getInteger(&(map->width)) == -1) break;
          if(getInteger(&(map->height)) == -1) break;

          if(map->width > map->maxsize || map->height > map->maxsize || map->width < 0 || map->height < 0) {
            msSetError(MS_WEBERR, "Image size out of range.", "msUpdateMapFromURL()");
            break;
          }
          msMapComputeGeotransform( map );
          break;
        case(TRANSPARENT):
          msyystate = MS_TOKENIZE_URL_STRING;
          msyystring = string;
          msyylex();

          if((map->transparent = getSymbol(2, MS_ON,MS_OFF)) == -1) break;
          msPostMapParseOutputFormatSetup( map );
          break;
        case(UNITS):
          msyystate = MS_TOKENIZE_URL_STRING;
          msyystring = string;
          msyylex();

          if((map->units = getSymbol(7, MS_INCHES,MS_FEET,MS_MILES,MS_METERS,MS_KILOMETERS,MS_NAUTICALMILES,MS_DD)) == -1) break;
          break;
        case(WEB):
          return msUpdateWebFromString(&(map->web), string, MS_TRUE);
        default:
          break; /* malformed string */
      }
      break;
    default:
      break;
  }

  /* msyystate = 3; */ /* restore lexer state */
  /* msyylex(); */

  if(ms_error->code != MS_NOERR) return(MS_FAILURE);

  return(MS_SUCCESS);
}

static void hashTableSubstituteString(hashTableObj *hash, const char *from, const char *to) {
  const char *key, *val;
  char *new_val;
  key = msFirstKeyFromHashTable(hash);
  while(key != NULL) {
    val = msLookupHashTable(hash, key);
    if(strcasestr(val, from)) {
      new_val = msCaseReplaceSubstring(msStrdup(val), from, to);
      msInsertHashTable(hash, key, new_val);
      msFree(new_val);
    }
    key = msNextKeyFromHashTable(hash, key);
  }
}

static void classSubstituteString(classObj *class, const char *from, const char *to) {
  if(class->expression.string) class->expression.string = msCaseReplaceSubstring(class->expression.string, from, to);
  if(class->text.string) class->text.string = msCaseReplaceSubstring(class->text.string, from, to);
  if(class->title) class->title = msCaseReplaceSubstring(class->title, from, to);
}


static void layerSubstituteString(layerObj *layer, const char *from, const char *to)
{
  int c;
  if(layer->data) layer->data = msCaseReplaceSubstring(layer->data, from, to);
  if(layer->tileindex) layer->tileindex = msCaseReplaceSubstring(layer->tileindex, from, to);
  if(layer->connection) layer->connection = msCaseReplaceSubstring(layer->connection, from, to);
  if(layer->filter.string) layer->filter.string = msCaseReplaceSubstring(layer->filter.string, from, to);
  
  /* The bindvalues are most useful when able to substitute values from the URL */
  hashTableSubstituteString(&layer->bindvals, from, to);
  hashTableSubstituteString(&layer->metadata, from, to);
  msLayerSubstituteProcessing( layer, from, to );
  for(c=0; c<layer->numclasses;c++) {
    classSubstituteString(layer->class[c], from, to);
  }
}

static void mapSubstituteString(mapObj *map, const char *from, const char *to) {
  int l;
  for(l=0;l<map->numlayers; l++) {
    layerSubstituteString(GET_LAYER(map,l), from, to);
  }
  /* output formats (#3751) */
  for(l=0; l<map->numoutputformats; l++) {
    int o;
    for(o=0; o<map->outputformatlist[l]->numformatoptions; o++) {
      map->outputformatlist[l]->formatoptions[o] = msCaseReplaceSubstring(map->outputformatlist[l]->formatoptions[o], from, to);
    }
  }
  hashTableSubstituteString(&map->web.metadata, from, to);
}

static void applyOutputFormatDefaultSubstitutions(outputFormatObj *format, const char *option, hashTableObj *table)
{
  const char *filename;

  filename = msGetOutputFormatOption(format, option, NULL);
  if(filename && strlen(filename)>0) {
    char *tmpfilename = msStrdup(filename);
    const char *default_key = msFirstKeyFromHashTable(table);
    while(default_key) {
      if(!strncmp(default_key,"default_",8)) {
        char *new_filename = NULL;
        size_t buffer_size = (strlen(default_key)-5);
        char *tag = (char *)msSmallMalloc(buffer_size);
        snprintf(tag, buffer_size, "%%%s%%", &(default_key[8]));

        new_filename = msStrdup(tmpfilename);
        new_filename = msCaseReplaceSubstring(new_filename, tag, msLookupHashTable(table, default_key));
        free(tag);

        msSetOutputFormatOption(format, option, new_filename);
        free(new_filename);
      }
      default_key = msNextKeyFromHashTable(table, default_key);
    }
    msFree(tmpfilename);
  }
  return;
}

static void applyClassDefaultSubstitutions(classObj *class, hashTableObj *table)
{
  const char *default_key = msFirstKeyFromHashTable(table);
  while(default_key) {
    if(!strncmp(default_key,"default_",8)) {
      size_t buffer_size = (strlen(default_key)-5);
      char *tag = (char *)msSmallMalloc(buffer_size);
      snprintf(tag, buffer_size, "%%%s%%", &(default_key[8]));


      classSubstituteString(class, tag, msLookupHashTable(table, default_key));
      free(tag);
    }
    default_key = msNextKeyFromHashTable(table, default_key);
  }
  return;
}

static void applyLayerDefaultSubstitutions(layerObj *layer, hashTableObj *table)
{
  int i;
  const char *default_key = msFirstKeyFromHashTable(table);
  while(default_key) {
    if(!strncmp(default_key,"default_",8)) {
      size_t buffer_size = (strlen(default_key)-5);
      const char *to = msLookupHashTable(table, default_key);
      char *tag = (char *)msSmallMalloc(buffer_size);
      snprintf(tag, buffer_size, "%%%s%%", &(default_key[8]));

      for(i=0; i<layer->numclasses; i++) {
        classSubstituteString(layer->class[i], tag, to);
      }
      layerSubstituteString(layer, tag, to);
      free(tag);
    }
    default_key = msNextKeyFromHashTable(table, default_key);
  }
  return;
}

static void applyHashTableDefaultSubstitutions(hashTableObj *hashTab, hashTableObj *table)
{
	const char *default_key = msFirstKeyFromHashTable(table);
	while (default_key) {
		if (!strncmp(default_key, "default_", 8)) {
			size_t buffer_size = (strlen(default_key) - 5);
			const char *to = msLookupHashTable(table, default_key);
			char *tag = (char *)msSmallMalloc(buffer_size);
			snprintf(tag, buffer_size, "%%%s%%", &(default_key[8]));

			hashTableSubstituteString(hashTab, tag, to);
			free(tag);
		}
		default_key = msNextKeyFromHashTable(table, default_key);
	}
	return;
}

/*
** Loop through layer metadata for keys that have a default_%key% pattern to replace
** remaining %key% entries by their default value.
*/
void msApplyDefaultSubstitutions(mapObj *map)
{
  int i,j;

  /* output formats (#3751) */
  for(i=0; i<map->numoutputformats; i++) {
    applyOutputFormatDefaultSubstitutions(map->outputformatlist[i], "filename", &(map->web.validation));
    applyOutputFormatDefaultSubstitutions(map->outputformatlist[i], "JSONP", &(map->web.validation));
  }

  for(i=0; i<map->numlayers; i++) {
    layerObj *layer = GET_LAYER(map, i);

    for(j=0; j<layer->numclasses; j++) {    /* class settings take precedence...  */
      classObj *class = GET_CLASS(map, i, j);
      applyClassDefaultSubstitutions(class, &(class->validation));
    }

    applyLayerDefaultSubstitutions(layer, &(layer->validation)); /* ...then layer settings... */
    applyLayerDefaultSubstitutions(layer, &(map->web.validation)); /* ...and finally web settings */
  }
  applyHashTableDefaultSubstitutions(&map->web.metadata, &(map->web.validation));
}

char *_get_param_value(const char *key, char **names, char **values, int npairs) {

  if(getenv(key)) { /* envirronment override */
    return getenv(key);
  }
  while(npairs) {
    npairs--;
    if(strcasecmp(key, names[npairs]) == 0) {
      return values[npairs];
    }
  }
  return NULL;
}

void msApplySubstitutions(mapObj *map, char **names, char **values, int npairs)
{
  int l;
  const char *key, *value, *validation;
  char *tag;
  for(l=0; l<map->numlayers; l++) {
    int c;
    layerObj *lp = GET_LAYER(map,l);
    for(c=0; c<lp->numclasses; c++) {
      classObj *cp = lp->class[c];
      key = NULL;
      while( (key = msNextKeyFromHashTable(&cp->validation, key)) ) {
        value = _get_param_value(key,names,values,npairs);
        if(!value) continue; /*parameter was not in url*/
        validation = msLookupHashTable(&cp->validation, key);
        if(msEvalRegex(validation, value)) {
          /* we've found a substitution and it validates correctly, now let's apply it */
          tag = msSmallMalloc(strlen(key)+3);
          sprintf(tag,"%%%s%%",key);
          classSubstituteString(cp,tag,value);
          free(tag);
        } else {
          msSetError(MS_REGEXERR, "Parameter pattern validation failed." , "msApplySubstitutions()");
          if(map->debug || lp->debug) {
            msDebug("layer (%s), class %d: failed to validate (%s=%s) for regex (%s)\n", lp->name, c, key, value, validation);
          }
        }

      }
    }
    key = NULL;
    while( (key = msNextKeyFromHashTable(&lp->validation, key)) ) {
      value = _get_param_value(key,names,values,npairs);
      if(!value) continue; /*parameter was not in url*/
      validation = msLookupHashTable(&lp->validation, key);
      if(msEvalRegex(validation, value)) {
        /* we've found a substitution and it validates correctly, now let's apply it */
        tag = msSmallMalloc(strlen(key)+3);
        sprintf(tag,"%%%s%%",key);
        layerSubstituteString(lp,tag,value);
        free(tag);
      } else {
        msSetError(MS_REGEXERR, "Parameter pattern validation failed." , "msApplySubstitutions()");
        if(map->debug || lp->debug) {
          msDebug("layer (%s): failed to validate (%s=%s) for regex (%s)\n", lp->name, key, value, validation);
        }
      }

    }
  }
  key = NULL;
  while( (key = msNextKeyFromHashTable(&map->web.validation, key)) ) {
    value = _get_param_value(key,names,values,npairs);
    if(!value) continue; /*parameter was not in url*/
    validation = msLookupHashTable(&map->web.validation, key);
    if(msEvalRegex(validation, value)) {
      /* we've found a substitution and it validates correctly, now let's apply it */
      tag = msSmallMalloc(strlen(key)+3);
      sprintf(tag,"%%%s%%",key);
      mapSubstituteString(map,tag,value);
      free(tag);
    } else {
      msSetError(MS_REGEXERR, "Parameter pattern validation failed." , "msApplySubstitutions()");
      if(map->debug) {
        msDebug("failed to validate (%s=%s) for regex (%s)\n", key, value, validation);
      }
    }

  }
}

/*
** Returns an array with one entry per mapfile token.  Useful to manipulate
** mapfiles in MapScript.
**
** The returned array should be freed using msFreeCharArray().
*/
static char **tokenizeMapInternal(char *filename, int *ret_numtokens)
{
  char **tokens = NULL;
  int  numtokens=0, numtokens_allocated=0;
  size_t buffer_size = 0;

  *ret_numtokens = 0;

  if(!filename) {
    msSetError(MS_MISCERR, "Filename is undefined.", "msTokenizeMap()");
    return NULL;
  }

  /*
  ** Check map filename to make sure it's legal
  */
  if(getenv("MS_MAPFILE_PATTERN")) { /* user override */
    if(msEvalRegex(getenv("MS_MAPFILE_PATTERN"), filename) != MS_TRUE) {
      msSetError(MS_REGEXERR, "MS_MAPFILE_PATTERN validation failed." , "msLoadMap()");
      return(NULL);
    }
  } else { /* check the default */
    if(msEvalRegex(MS_DEFAULT_MAPFILE_PATTERN, filename) != MS_TRUE) {
      msSetError(MS_REGEXERR, "MS_DEFAULT_MAPFILE_PATTERN validation failed." , "msLoadMap()");
      return(NULL);
    }
  }

  if((msyyin = fopen(filename,"r")) == NULL) {
    msSetError(MS_IOERR, "(%s)", "msTokenizeMap()", filename);
    return NULL;
  }

  msyystate = MS_TOKENIZE_FILE; /* restore lexer state to INITIAL, and do return comments */
  msyylex();
  msyyreturncomments = 1; /* want all tokens, including comments */

  msyyrestart(msyyin); /* start at line begining, line 1 */
  msyylineno = 1;

  numtokens = 0;
  numtokens_allocated = 256;
  tokens = (char **) malloc(numtokens_allocated*sizeof(char*));
  if(tokens == NULL) {
    msSetError(MS_MEMERR, NULL, "msTokenizeMap()");
    fclose(msyyin);
    return NULL;
  }

  for(;;) {

    if(numtokens_allocated <= numtokens) {
      numtokens_allocated *= 2; /* double size of the array every time we reach the limit */
      tokens = (char **)realloc(tokens, numtokens_allocated*sizeof(char*));
      if(tokens == NULL) {
        msSetError(MS_MEMERR, "Realloc() error.", "msTokenizeMap()");
        fclose(msyyin);
        return NULL;
      }
    }

    switch(msyylex()) {
      case(EOF): /* This is the normal way out... cleanup and exit */
        fclose(msyyin);
        *ret_numtokens = numtokens;
        return(tokens);
        break;
      case(MS_STRING):
        buffer_size = strlen(msyystring_buffer)+2+1;
        tokens[numtokens] = (char*) msSmallMalloc(buffer_size);
        snprintf(tokens[numtokens], buffer_size, "\"%s\"", msyystring_buffer);
        break;
      case(MS_EXPRESSION):
        buffer_size = strlen(msyystring_buffer)+2+1;
        tokens[numtokens] = (char*) msSmallMalloc(buffer_size);
        snprintf(tokens[numtokens], buffer_size, "(%s)", msyystring_buffer);
        break;
      case(MS_REGEX):
        buffer_size = strlen(msyystring_buffer)+2+1;
        tokens[numtokens] = (char*) msSmallMalloc(buffer_size);
        snprintf(tokens[numtokens], buffer_size, "/%s/", msyystring_buffer);
        break;
      default:
        tokens[numtokens] = msStrdup(msyystring_buffer);
        break;
    }

    if(tokens[numtokens] == NULL) {
      int i;
      msSetError(MS_MEMERR, NULL, "msTokenizeMap()");
      fclose(msyyin);
      for(i=0; i<numtokens; i++)
        msFree(tokens[i]);
      msFree(tokens);
      return NULL;
    }

    numtokens++;
  }

  return NULL;   /* should never get here */
}

/*
** Wraps tokenizeMapInternal
*/
char **msTokenizeMap(char *filename, int *numtokens)
{
  char **tokens;

  msAcquireLock( TLOCK_PARSER );
  tokens = tokenizeMapInternal( filename, numtokens );
  msReleaseLock( TLOCK_PARSER );

  return tokens;
}

void msCloseConnections(mapObj *map)
{
  int i;
  layerObj *lp;

  for (i=0; i<map->numlayers; i++) {
    lp = (GET_LAYER(map, i));

    /* If the vtable is null, then the layer is never accessed or used -> skip it
     */
    if (lp->vtable) {
      lp->vtable->LayerCloseConnection(lp);
    }
  }
}

void initResultCache(resultCacheObj *resultcache)
{
  if (resultcache) {
    resultcache->results = NULL;
    resultcache->numresults = 0;
    resultcache->cachesize = 0;
    resultcache->bounds.minx = resultcache->bounds.miny = resultcache->bounds.maxx = resultcache->bounds.maxy = -1;
    resultcache->previousBounds = resultcache->bounds;
    resultcache->usegetshape = MS_FALSE;
  }
}

void cleanupResultCache(resultCacheObj *resultcache)
{
  if(resultcache) {
    if(resultcache->results)
    {
        int i;
        for( i = 0; i < resultcache->numresults; i++ )
        {
            if( resultcache->results[i].shape )
            {
                msFreeShape( resultcache->results[i].shape );
                msFree( resultcache->results[i].shape );
            }
        }
        free(resultcache->results);
    }
    resultcache->results = NULL;
    initResultCache(resultcache);
  }
}


static int resolveSymbolNames(mapObj* map)
{
  int i, j;

  /* step through layers and classes to resolve symbol names */
  for(i=0; i<map->numlayers; i++) {
    for(j=0; j<GET_LAYER(map, i)->numclasses; j++) {
      if(classResolveSymbolNames(GET_LAYER(map, i)->class[j]) != MS_SUCCESS) return MS_FAILURE;
    }
  }

  return MS_SUCCESS;
}