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/*
Copyright (c) 2006,8 Joey Schulze <joey@infodrom.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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <locale.h>
#include <langinfo.h>
#include <string.h>
#include <iconv.h>
#include <errno.h>
char *charset = NULL;
/*
* Determine the output character set
*/
void set_charset()
{
setlocale (LC_CTYPE, "");
charset = strdup (nl_langinfo(CODESET));
}
/*
* Convert a word from an arbitrary charset into the output character set
*
* No conversion is performed when both charsets are equal
*/
char *convert_word(const char *encoding, char *inbuf, char *outbuf, size_t outbytesleft)
{
iconv_t cd;
char *inptr, *outptr;
size_t inbytesleft;
size_t nconv;
size_t outsize;
if (!charset || !strcasecmp (encoding, charset)) {
memmove (outbuf, inbuf, strlen(inbuf)<outbytesleft?strlen(inbuf)+1:outbytesleft);
outbuf[outbytesleft-1] = '\0';
return outbuf;
}
outsize = outbytesleft;
cd = iconv_open (charset, encoding);
inbytesleft = strlen (inbuf)+1;
inptr = inbuf;
outptr = outbuf;
while (1) {
nconv = iconv (cd, &inptr, &inbytesleft, &outptr, &outbytesleft);
if (nconv != -1)
break;
if (errno == EILSEQ && outsize-outbytesleft >= 0 && outbytesleft > 1) {
outbuf[outsize-outbytesleft] = '?';
outbuf[outsize-outbytesleft+1] = '\0';
outbytesleft--;
inbytesleft--;
outptr++;
inptr++;
} else
break;
}
iconv_close(cd);
if (nconv == -1 && outsize-outbytesleft >= 0)
outbuf[outsize-outbytesleft] = '\0';
return outbuf;
}
/*
* Needs to be called with LANG=de_DE.ISO-8859-1
void test_charset()
{
char outbuf[100];
size_t size = 99;
memset (outbuf, 0, sizeof (outbuf));
printf ("%s\n", convert_word ("UTF-8", "für ein", outbuf, size));
printf ("%s\n", outbuf);
if (!strcmp(outbuf, "fr ein"))
printf ("charset.c: test passed\n");
else
printf ("charset.c: test failed\n");
}
*/
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