convert.c

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/*
     This file is part of libextractor.
     (C) 2004 Vidyut Samanta and Christian Grothoff

     libextractor is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published
     by the Free Software Foundation; either version 2, or (at your
     option) any later version.

     libextractor is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     General Public License for more details.

     You should have received a copy of the GNU General Public License
     along with libextractor; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
 */

#include "platform.h"
#include "extractor.h"
#include "convert.h"

/**
 * Convert the len characters long character sequence
 * given in input that is in the given charset
 * to UTF-8.
 * @return the converted string (0-terminated),
 *  if conversion fails, a copy of the orignal
 *  string is returned.
 */
char *
EXTRACTOR_common_convert_to_utf8 (const char *input, size_t len, const char *charset)
{
  size_t tmpSize;
  size_t finSize;
  char *tmp;
  char *ret;
  char *itmp;
  const char *i;
  iconv_t cd;

  i = input;
  cd = iconv_open ("UTF-8", charset);
  if (cd == (iconv_t) - 1)
    return strdup (i);
  tmpSize = 3 * len + 4;
  tmp = malloc (tmpSize);
  itmp = tmp;
  finSize = tmpSize;
  if (iconv (cd, (char **) &input, &len, &itmp, &finSize) == (size_t) - 1)
    {
      iconv_close (cd);
      free (tmp);
      return strdup (i);
    }
  ret = malloc (tmpSize - finSize + 1);
  memcpy (ret, tmp, tmpSize - finSize);
  ret[tmpSize - finSize] = '\0';
  free (tmp);
  iconv_close (cd);
  return ret;
}

/* end of convert.c */

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