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/* Conversion from UTF-8 to legacy encodings.
Copyright (C) 2002, 2006-2007, 2009-2016 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or
modify it under the terms of either:
* the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your
option) any later version.
or
* 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.
or both in parallel, as here.
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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>. */
#include <config.h>
/* Specification. */
#include "uniconv.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "c-strcaseeq.h"
#include "striconveha.h"
#include "unistr.h"
char *
u8_conv_to_encoding (const char *tocode,
enum iconv_ilseq_handler handler,
const uint8_t *src, size_t srclen,
size_t *offsets,
char *resultbuf, size_t *lengthp)
{
if (STRCASEEQ (tocode, "UTF-8", 'U','T','F','-','8',0,0,0,0))
{
char *result;
/* Conversion from UTF-8 to UTF-8. No need to go through iconv(). */
if (u8_check (src, srclen))
{
errno = EILSEQ;
return NULL;
}
/* Memory allocation. */
if (resultbuf != NULL && *lengthp >= srclen)
result = resultbuf;
else
{
result = (char *) malloc (srclen > 0 ? srclen : 1);
if (result == NULL)
{
errno = ENOMEM;
return NULL;
}
}
memcpy (result, (const char *) src, srclen);
*lengthp = srclen;
return result;
}
else
{
char *result = resultbuf;
size_t length = *lengthp;
if (mem_iconveha ((const char *) src, srclen,
"UTF-8", tocode,
handler == iconveh_question_mark, handler,
offsets, &result, &length) < 0)
return NULL;
if (result == NULL) /* when (resultbuf == NULL && length == 0) */
{
result = (char *) malloc (1);
if (result == NULL)
{
errno = ENOMEM;
return NULL;
}
}
*lengthp = length;
return result;
}
}
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