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/*
* Copyright (C) 2001 Peter Harris <peter.harris@hummingbird.com>
* Copyright (C) 2001 Edmund Grimley Evans <edmundo@rano.org>
*
* Buffer overflow checking added: Josh Coalson, 9/9/2007
*
* Win32 part rewritten: lvqcl, 2/2/2016
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* Convert a string between UTF-8 and the locale's charset.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include "share/alloc.h"
#include "share/utf8.h"
#ifdef _WIN32
#include <windows.h>
int utf8_encode(const char *from, char **to)
{
wchar_t *unicode = NULL;
char *utf8 = NULL;
int ret = -1;
do {
int len;
len = MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, from, -1, NULL, 0);
if(len == 0) break;
unicode = (wchar_t*) safe_malloc_mul_2op_((size_t)len, sizeof(wchar_t));
if(unicode == NULL) break;
len = MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, from, -1, unicode, len);
if(len == 0) break;
len = WideCharToMultiByte(CP_UTF8, 0, unicode, -1, NULL, 0, NULL, NULL);
if(len == 0) break;
utf8 = (char*) safe_malloc_mul_2op_((size_t)len, sizeof(char));
if(utf8 == NULL) break;
len = WideCharToMultiByte(CP_UTF8, 0, unicode, -1, utf8, len, NULL, NULL);
if(len == 0) break;
ret = 0;
} while(0);
free(unicode);
if(ret == 0) {
*to = utf8;
} else {
free(utf8);
*to = NULL;
}
return ret;
}
int utf8_decode(const char *from, char **to)
{
wchar_t *unicode = NULL;
char *acp = NULL;
int ret = -1;
do {
int len;
len = MultiByteToWideChar(CP_UTF8, 0, from, -1, NULL, 0);
if(len == 0) break;
unicode = (wchar_t*) safe_malloc_mul_2op_((size_t)len, sizeof(wchar_t));
if(unicode == NULL) break;
len = MultiByteToWideChar(CP_UTF8, 0, from, -1, unicode, len);
if(len == 0) break;
len = WideCharToMultiByte(CP_ACP, WC_COMPOSITECHECK, unicode, -1, NULL, 0, NULL, NULL);
if(len == 0) break;
acp = (char*) safe_malloc_mul_2op_((size_t)len, sizeof(char));
if(acp == NULL) break;
len = WideCharToMultiByte(CP_ACP, WC_COMPOSITECHECK, unicode, -1, acp, len, NULL, NULL);
if(len == 0) break;
ret = 0;
} while(0);
free(unicode);
if(ret == 0) {
*to = acp;
} else {
free(acp);
*to = NULL;
}
return ret;
}
#else /* End win32. Rest is for real operating systems */
#ifdef HAVE_LANGINFO_CODESET
#include <langinfo.h>
#endif
#include <string.h>
#include "share/safe_str.h"
#include "iconvert.h"
#include "charset.h"
static const char *current_charset(void)
{
const char *c = 0;
#ifdef HAVE_LANGINFO_CODESET
c = nl_langinfo(CODESET);
#endif
if (!c)
c = getenv("CHARSET");
return c? c : "US-ASCII";
}
static int convert_buffer(const char *fromcode, const char *tocode,
const char *from, size_t fromlen,
char **to, size_t *tolen)
{
int ret = -1;
#ifdef HAVE_ICONV
ret = iconvert(fromcode, tocode, from, fromlen, to, tolen);
if (ret != -1)
return ret;
#endif
#ifndef HAVE_ICONV /* should be ifdef USE_CHARSET_CONVERT */
ret = charset_convert(fromcode, tocode, from, fromlen, to, tolen);
if (ret != -1)
return ret;
#endif
return ret;
}
static int convert_string(const char *fromcode, const char *tocode,
const char *from, char **to, char replace)
{
int ret;
size_t fromlen;
char *s;
fromlen = strlen(from);
ret = convert_buffer(fromcode, tocode, from, fromlen, to, 0);
if (ret == -2)
return -1;
if (ret != -1)
return ret;
s = safe_malloc_add_2op_(fromlen, /*+*/1);
if (!s)
return -1;
safe_strncpy(s, from, fromlen + 1);
*to = s;
for (; *s; s++)
if (*s & ~0x7f)
*s = replace;
return 3;
}
int utf8_encode(const char *from, char **to)
{
return convert_string(current_charset(), "UTF-8", from, to, '#');
}
int utf8_decode(const char *from, char **to)
{
return convert_string("UTF-8", current_charset(), from, to, '?');
}
#endif
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