1/* Get descriptor for character set conversion.
2 Copyright (C) 1997-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <alloca.h>
21#include <errno.h>
22#include <iconv.h>
23#include <stdbool.h>
24#include <stdlib.h>
25#include <string.h>
26
27#include <gconv_int.h>
28#include "gconv_charset.h"
29
30
31iconv_t
32iconv_open (const char *tocode, const char *fromcode)
33{
34 __gconv_t cd;
35 struct gconv_spec conv_spec;
36
37 if (__gconv_create_spec (&conv_spec, fromcode, tocode) == NULL)
38 return (iconv_t) -1;
39
40 int res = __gconv_open (&conv_spec, &cd, 0);
41
42 gconv_destroy_spec (&conv_spec);
43
44 if (__builtin_expect (res, __GCONV_OK) != __GCONV_OK)
45 {
46 /* We must set the error number according to the specs. */
47 if (res == __GCONV_NOCONV || res == __GCONV_NODB)
48 __set_errno (EINVAL);
49
50 cd = (iconv_t) -1;
51 }
52
53 return (iconv_t) cd;
54}
55