1/* Get descriptor for character set conversion.
2 Copyright (C) 1997-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <alloca.h>
20#include <errno.h>
21#include <iconv.h>
22#include <stdbool.h>
23#include <stdlib.h>
24#include <string.h>
25
26#include <gconv_int.h>
27#include "gconv_charset.h"
28
29
30iconv_t
31iconv_open (const char *tocode, const char *fromcode)
32{
33 __gconv_t cd;
34 struct gconv_spec conv_spec;
35
36 if (__gconv_create_spec (&conv_spec, fromcode, tocode) == NULL)
37 return (iconv_t) -1;
38
39 int res = __gconv_open (&conv_spec, &cd, 0);
40
41 __gconv_destroy_spec (&conv_spec);
42
43 if (__builtin_expect (res, __GCONV_OK) != __GCONV_OK)
44 {
45 /* We must set the error number according to the specs. */
46 if (res == __GCONV_NOCONV || res == __GCONV_NODB)
47 __set_errno (EINVAL);
48
49 cd = (iconv_t) -1;
50 }
51
52 return (iconv_t) cd;
53}
54