Function msGetEncodedString

mapstring.c:1658–1716

** Simple charset converter. Converts string from specified encoding to UTF-8. ** The return value must be freed by the caller. */

** The return value must be freed by the caller.
*/
char *msGetEncodedString(const char *string, const char *encoding)
{
#ifdef USE_ICONV
  iconv_t cd = NULL;
  const char *inp;
  char *outp, *out = NULL;
  size_t len, bufsize, bufleft, iconv_status;

#ifdef USE_FRIBIDI
  if(fribidi_parse_charset ((char*)encoding))
    return msGetFriBidiEncodedString(string, encoding);
#endif 
  len = strlen(string);

  if (len == 0 || (encoding && strcasecmp(encoding, "UTF-8")==0))
      return msStrdup(string);    /* Nothing to do: string already in UTF-8 */

  cd = iconv_open("UTF-8", encoding);
  if(cd == (iconv_t)-1) {
    msSetError(MS_IDENTERR, "Encoding not supported by libiconv (%s).", 
               "msGetEncodedString()", encoding);
    return NULL;
  }

  bufsize = len * 6 + 1; /* Each UTF-8 char can be up to 6 bytes */
  inp = string;
  out = (char*) malloc(bufsize);
  if(out == NULL){
    msSetError(MS_MEMERR, NULL, "msGetEncodedString()");
    iconv_close(cd);
    return NULL;
  }
  strlcpy(out, string, bufsize);
  outp = out;

  bufleft = bufsize;
  iconv_status = -1;

  while (len > 0){
    iconv_status = iconv(cd, (char**)&inp, &len, &outp, &bufleft);
    if(iconv_status == -1){
      msFree(out);
      iconv_close(cd);
      return msStrdup(string);
    }
  }
  out[bufsize - bufleft] = '\0';
  
  iconv_close(cd);

  return out;
#else
  if (*string == '\0' || (encoding && strcasecmp(encoding, "UTF-8")==0))
      return msStrdup(string);    /* Nothing to do: string already in UTF-8 */

  msSetError(MS_MISCERR, "Not implemeted since Iconv is not enabled.", "msGetEncodedString()");
  return NULL;
#endif