159 lines
3.5 KiB
C
159 lines
3.5 KiB
C
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/* plugin_common - Routines common to several plugins
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* Copyright (C) 2002-2009 Josh Coalson
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* Copyright (C) 2011-2016 Xiph.Org Foundation
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*
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* Only slightly modified charset.c from:
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* EasyTAG - Tag editor for MP3 and OGG files
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* Copyright (C) 1999-2001 H<EFBFBD>vard Kv<EFBFBD>len <havardk@xmms.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#ifdef HAVE_ICONV
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#include <iconv.h>
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#endif
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#ifdef HAVE_LANGINFO_CODESET
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#include <langinfo.h>
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#endif
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#include "charset.h"
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/*************
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* Functions *
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*************/
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char* FLAC_plugin__charset_get_current (void)
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{
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char *charset = getenv("CHARSET");
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#ifdef HAVE_LANGINFO_CODESET
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if (!charset)
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charset = nl_langinfo(CODESET);
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#endif
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if (!charset)
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charset = "ISO-8859-1";
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return charset;
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}
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#ifdef HAVE_ICONV
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char* FLAC_plugin__charset_convert_string (const char *string, char *from, char *to)
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{
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size_t outleft, outsize, length;
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iconv_t cd;
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char *out, *outptr;
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const char *input = string;
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if (!string)
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return NULL;
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length = strlen(string);
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if ((cd = iconv_open(to, from)) == (iconv_t)-1)
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{
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#ifndef NDEBUG
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fprintf(stderr, "convert_string(): Conversion not supported. Charsets: %s -> %s", from, to);
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#endif
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return strdup(string);
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}
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/* Due to a GLIBC bug, round outbuf_size up to a multiple of 4 */
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/* + 1 for nul in case len == 1 */
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outsize = ((length + 3) & ~3) + 1;
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if(outsize < length) /* overflow check */
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return NULL;
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out = malloc(outsize);
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outleft = outsize - 1;
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outptr = out;
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retry:
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if (iconv(cd, (char**)&input, &length, &outptr, &outleft) == (size_t)(-1))
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{
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int used;
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switch (errno)
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{
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case E2BIG:
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used = outptr - out;
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if((outsize - 1) * 2 + 1 <= outsize) { /* overflow check */
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free(out);
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return NULL;
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}
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outsize = (outsize - 1) * 2 + 1;
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out = realloc(out, outsize);
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outptr = out + used;
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outleft = outsize - 1 - used;
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goto retry;
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case EINVAL:
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break;
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case EILSEQ:
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/* Invalid sequence, try to get the rest of the string */
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input++;
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length = strlen(input);
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goto retry;
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default:
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#ifndef NDEBUG
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fprintf(stderr, "convert_string(): Conversion failed. Inputstring: %s; Error: %s", string, strerror(errno));
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#endif
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break;
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}
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}
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*outptr = '\0';
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iconv_close(cd);
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return out;
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}
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#else
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char* FLAC_plugin__charset_convert_string (const char *string, char *from, char *to)
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{
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(void)from, (void)to;
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if (!string)
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return NULL;
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return strdup(string);
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}
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#endif
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#ifdef HAVE_ICONV
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int FLAC_plugin__charset_test_conversion (char *from, char *to)
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{
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iconv_t cd;
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if ((cd=iconv_open(to,from)) == (iconv_t)-1)
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{
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/* Conversion not supported */
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return 0;
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}
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iconv_close(cd);
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return 1;
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}
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#else
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int FLAC_plugin__charset_test_conversion (char *from, char *to)
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{
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(void)from, (void)to;
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return 1;
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}
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#endif
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