nathan@25: /*
nathan@25:  * MP3/MPlayer plugin to VDR (C++)
nathan@25:  *
nathan@25:  * (C) 2001-2009 Stefan Huelswitt <s.huelswitt@gmx.de>
nathan@25:  *
nathan@25:  * This code is free software; you can redistribute it and/or
nathan@25:  * modify it under the terms of the GNU General Public License
nathan@25:  * as published by the Free Software Foundation; either version 2
nathan@25:  * of the License, or (at your option) any later version.
nathan@25:  *
nathan@25:  * This code is distributed in the hope that it will be useful,
nathan@25:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nathan@25:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nathan@25:  * GNU General Public License for more details.
nathan@25:  *
nathan@25:  * You should have received a copy of the GNU General Public License
nathan@25:  * along with this program; if not, write to the Free Software
nathan@25:  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
nathan@25:  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
nathan@25:  */
nathan@25: 
nathan@25: #include <stdlib.h>
nathan@25: #include <string.h>
nathan@25: 
nathan@25: #if APIVERSNUM < 10503
nathan@25: 
nathan@25: #include <errno.h>
nathan@25: #include <vdr/tools.h>
nathan@25: #include "common.h"
nathan@25: 
nathan@25: // --- cCharSetConv ----------------------------------------------------------
nathan@25: 
nathan@25: char *cCharSetConv::systemCharacterTable = NULL;
nathan@25: 
nathan@25: cCharSetConv::cCharSetConv(const char *FromCode, const char *ToCode)
nathan@25: {
nathan@25:   if (!FromCode)
nathan@25:      FromCode = systemCharacterTable;
nathan@25:   if (!ToCode)
nathan@25:      ToCode = "UTF-8";
nathan@25:   cd = (FromCode && ToCode) ? iconv_open(ToCode, FromCode) : (iconv_t)-1;
nathan@25:   result = NULL;
nathan@25:   length = 0;
nathan@25: }
nathan@25: 
nathan@25: cCharSetConv::~cCharSetConv()
nathan@25: {
nathan@25:   free(result);
nathan@25:   iconv_close(cd);
nathan@25: }
nathan@25: 
nathan@25: void cCharSetConv::SetSystemCharacterTableX(const char *CharacterTable)
nathan@25: {
nathan@25:   free(systemCharacterTable);
nathan@25:   systemCharacterTable = NULL;
nathan@25:   if (!strcasestr(CharacterTable, "UTF-8")) {
nathan@25:      systemCharacterTable = strdup(CharacterTable);
nathan@25:      }
nathan@25: }
nathan@25: 
nathan@25: const char *cCharSetConv::Convert(const char *From, char *To, size_t ToLength)
nathan@25: {
nathan@25:   if (cd != (iconv_t)-1 && From && *From) {
nathan@25:      char *FromPtr = (char *)From;
nathan@25:      size_t FromLength = strlen(From);
nathan@25:      char *ToPtr = To;
nathan@25:      if (!ToPtr) {
nathan@25:         length = max(length, FromLength * 2); // some reserve to avoid later reallocations
nathan@25:         result = (char *)realloc(result, length);
nathan@25:         ToPtr = result;
nathan@25:         ToLength = length;
nathan@25:         }
nathan@25:      else if (!ToLength)
nathan@25:         return From; // can't convert into a zero sized buffer
nathan@25:      ToLength--; // save space for terminating 0
nathan@25:      char *Converted = ToPtr;
nathan@25:      while (FromLength > 0) {
nathan@25:            if (iconv(cd, &FromPtr, &FromLength, &ToPtr, &ToLength) == size_t(-1)) {
nathan@25:               if (errno == E2BIG || errno == EILSEQ && ToLength < 1) {
nathan@25:                  if (To)
nathan@25:                     break; // caller provided a fixed size buffer, but it was too small
nathan@25:                  // The result buffer is too small, so increase it:
nathan@25:                  size_t d = ToPtr - result;
nathan@25:                  size_t r = length / 2;
nathan@25:                  length += r;
nathan@25:                  Converted = result = (char *)realloc(result, length);
nathan@25:                  ToLength += r;
nathan@25:                  ToPtr = result + d;
nathan@25:                  }
nathan@25:               if (errno == EILSEQ) {
nathan@25:                  // A character can't be converted, so mark it with '?' and proceed:
nathan@25:                  FromPtr++;
nathan@25:                  FromLength--;
nathan@25:                  *ToPtr++ = '?';
nathan@25:                  ToLength--;
nathan@25:                  }
nathan@25:               else if (errno != E2BIG)
nathan@25:                  return From; // unknown error, return original string
nathan@25:               }
nathan@25:            }
nathan@25:      *ToPtr = 0;
nathan@25:      return Converted;
nathan@25:      }
nathan@25:   return From;
nathan@25: }
nathan@25: 
nathan@25: #endif