1/* Conversion from UTF-16/UTF-32 to legacy encodings.
2   Copyright (C) 2002, 2006-2007, 2009-2010 Free Software Foundation, Inc.
3
4   This program is free software: you can redistribute it and/or modify it
5   under the terms of the GNU Lesser General Public License as published
6   by the Free Software Foundation; either version 3 of the License, or
7   (at your option) any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public License
15   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
16
17char *
18FUNC (const UNIT *string,
19      const char *tocode,
20      enum iconv_ilseq_handler handler)
21{
22#if HAVE_UTF_NAME
23  char *result = NULL;
24  size_t length = 0;
25
26  if (mem_iconveha ((const char *) string, (U_STRLEN (string) + 1) * sizeof (UNIT),
27                    UTF_NAME, tocode,
28                    handler == iconveh_question_mark, handler,
29                    NULL, &result, &length) < 0)
30    return NULL;
31  /* Verify the result has exactly one NUL byte, at the end.  */
32  if (!(length > 0 && result[length-1] == '\0' && strlen (result) == length-1))
33    {
34      free (result);
35      errno = EILSEQ;
36      return NULL;
37    }
38  return result;
39#else
40  uint8_t tmpbuf[4096];
41  size_t tmpbufsize = SIZEOF (tmpbuf);
42  uint8_t *utf8_string;
43  char *result;
44
45  utf8_string = U_TO_U8 (string, U_STRLEN (string) + 1, tmpbuf, &tmpbufsize);
46  if (utf8_string == NULL)
47    return NULL;
48  result = u8_strconv_to_encoding (utf8_string, tocode, handler);
49  if (result == NULL)
50    {
51      if (utf8_string != tmpbuf)
52        {
53          int saved_errno = errno;
54          free (utf8_string);
55          errno = saved_errno;
56        }
57      return NULL;
58    }
59  if (utf8_string != tmpbuf)
60    free (utf8_string);
61  return result;
62#endif
63}
64