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/* Conversion to UTF-16/UTF-32 from legacy encodings.
Copyright (C) 2002, 2006-2007, 2009-2015 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify it
under the terms of 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.
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/>. */
UNIT *
FUNC (const char *fromcode,
enum iconv_ilseq_handler handler,
const char *src, size_t srclen,
size_t *offsets,
UNIT *resultbuf, size_t *lengthp)
{
#if HAVE_UTF_NAME
char *result = (char *) resultbuf;
size_t length = *lengthp * sizeof (UNIT);
if (mem_iconveha (src, srclen, fromcode, UTF_NAME, true, handler,
offsets, &result, &length) < 0)
return NULL;
if (offsets != NULL)
{
/* Convert 'char *' offsets to 'UNIT *' offsets. */
size_t *offsets_end = offsets + srclen;
size_t *o;
for (o = offsets; o < offsets_end; o++)
if (*o != (size_t)(-1))
*o = *o / sizeof (UNIT);
}
if ((length % sizeof (UNIT)) != 0)
abort ();
*lengthp = length / sizeof (UNIT);
return (UNIT *) result;
#else
uint8_t *utf8_string;
size_t utf8_length;
UNIT *result;
utf8_string =
u8_conv_from_encoding (fromcode, handler, src, srclen, offsets,
NULL, &utf8_length);
if (utf8_string == NULL)
return NULL;
result = U8_TO_U (utf8_string, utf8_length, resultbuf, lengthp);
if (result == NULL)
{
int saved_errno = errno;
free (utf8_string);
errno = saved_errno;
return NULL;
}
if (offsets != NULL)
{
size_t length = *lengthp;
size_t *offsets_end = offsets + srclen;
size_t *o;
size_t off8 = 0; /* offset into utf8_string */
size_t offunit = 0; /* offset into result */
for (o = offsets; o < offsets_end; o++)
if (*o != (size_t)(-1))
{
while (off8 < *o)
{
int count8 = u8_mblen (utf8_string + off8, utf8_length - off8);
int countunit = U_MBLEN (result + offunit, length - offunit);
if (count8 < 0 || countunit < 0)
abort ();
off8 += count8;
offunit += countunit;
}
if (*o != off8)
abort ();
*o = offunit;
}
}
free (utf8_string);
return result;
#endif
}
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