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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.org
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "charConv.h"
#include "utf8.h"
#include "utils.h"
#include "path.h"
#include "os_compat.h"
#include "../config.h"
#ifdef HAVE_ICONV
#include <iconv.h>
static iconv_t char_conv_iconv;
#endif
static char *char_conv_to;
static char *char_conv_from;
static int8_t char_conv_same;
static int8_t char_conv_use_iconv;
/* 1 is to use latin1ToUtf8
0 is not to use latin1/utf8 converter
-1 is to use utf8ToLatin1*/
static int8_t char_conv_latin1ToUtf8;
#define BUFFER_SIZE MPD_PATH_MAX
static void closeCharSetConversion(void);
int setCharSetConversion(const char *to, const char *from)
{
if (char_conv_to && char_conv_from) {
if (char_conv_latin1ToUtf8 &&
!strcmp(from, char_conv_to) &&
!strcmp(to, char_conv_from)) {
char *swap = char_conv_from;
char_conv_from = char_conv_to;
char_conv_to = swap;
char_conv_latin1ToUtf8 *= -1;
return 0;
} else if (!strcmp(to, char_conv_to) &&
!strcmp(from,char_conv_from)) {
return 0;
}
}
closeCharSetConversion();
if (0 == strcmp(to, from)) {
char_conv_same = 1;
char_conv_to = xstrdup(to);
char_conv_from = xstrdup(from);
return 0;
}
if (strcmp(to, "UTF-8") == 0 && strcmp(from, "ISO-8859-1") == 0) {
char_conv_latin1ToUtf8 = 1;
} else if (strcmp(to, "ISO-8859-1") == 0 && strcmp(from, "UTF-8") == 0) {
char_conv_latin1ToUtf8 = -1;
}
if (char_conv_latin1ToUtf8 != 0) {
char_conv_to = xstrdup(to);
char_conv_from = xstrdup(from);
return 0;
}
#ifdef HAVE_ICONV
if ((char_conv_iconv = iconv_open(to, from)) == (iconv_t) (-1))
return -1;
char_conv_to = xstrdup(to);
char_conv_from = xstrdup(from);
char_conv_use_iconv = 1;
return 0;
#else
return -1;
#endif
}
#ifdef HAVE_ICONV
static inline size_t deconst_iconv(iconv_t cd,
const char **inbuf, size_t *inbytesleft,
char **outbuf, size_t *outbytesleft)
{
union {
const char **a;
char **b;
} deconst;
deconst.a = inbuf;
return iconv(cd, deconst.b, inbytesleft, outbuf, outbytesleft);
}
#endif
char *char_conv_str(char *dest, const char *string)
{
if (!char_conv_to)
return NULL;
if (char_conv_same)
return strcpy(dest, string);
#ifdef HAVE_ICONV
if (char_conv_use_iconv) {
/* not optimized: */
char buffer[BUFFER_SIZE];
size_t inleft = strlen(string);
size_t outleft;
size_t retlen = 0;
size_t err;
char *bufferPtr;
dest[0] = '\0';
while (inleft) {
bufferPtr = buffer;
outleft = BUFFER_SIZE;
err =
deconst_iconv(char_conv_iconv, &string, &inleft,
&bufferPtr, &outleft);
if (outleft == BUFFER_SIZE
|| (err == (size_t)-1L && errno != E2BIG)) {
return NULL;
}
memcpy(dest + retlen, buffer, BUFFER_SIZE - outleft);
retlen += BUFFER_SIZE - outleft;
dest[retlen] = '\0';
}
return dest;
}
#endif
switch (char_conv_latin1ToUtf8) {
case 1:
return latin1_to_utf8(dest, string);
case -1:
return utf8_to_latin1(dest, string);
}
return NULL;
}
static void closeCharSetConversion(void)
{
if (char_conv_to) {
#ifdef HAVE_ICONV
if (char_conv_use_iconv)
iconv_close(char_conv_iconv);
#endif
free(char_conv_to);
free(char_conv_from);
char_conv_to = NULL;
char_conv_from = NULL;
char_conv_same = 0;
char_conv_latin1ToUtf8 = 0;
char_conv_use_iconv = 0;
}
}
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