gsasl  1.10.0
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mbtowc-impl.h
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1 /* Convert multibyte character to wide character.
2  Copyright (C) 2011-2021 Free Software Foundation, Inc.
3  Written by Bruno Haible <bruno@clisp.org>, 2011.
4 
5  This program is free software: you can redistribute it and/or modify
6  it under the terms of the GNU General Public License as published by
7  the Free Software Foundation; either version 3 of the License, or
8  (at your option) any later version.
9 
10  This program 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
13  GNU General Public License for more details.
14 
15  You should have received a copy of the GNU General Public License
16  along with this program. If not, see <https://www.gnu.org/licenses/>. */
17 
18 /* We don't need a static internal state, because the encoding is not state
19  dependent, and when mbrtowc returns (size_t)(-2). we throw the result
20  away. */
21 
22 int
23 mbtowc (wchar_t *pwc, const char *s, size_t n)
24 {
25  if (s == NULL)
26  return 0;
27  else
28  {
29  mbstate_t state;
30  wchar_t wc;
31  size_t result;
32 
33  memset (&state, 0, sizeof (mbstate_t));
34  result = mbrtowc (&wc, s, n, &state);
35  if (result == (size_t)-1 || result == (size_t)-2)
36  {
37  errno = EILSEQ;
38  return -1;
39  }
40  if (pwc != NULL)
41  *pwc = wc;
42  return (wc == 0 ? 0 : result);
43  }
44 }
#define EILSEQ
Definition: errno.in.h:274
#define NULL
Definition: stddef.in.h:72
#define mbstate_t
Definition: wchar.in.h:143
int mbtowc(wchar_t *pwc, const char *s, size_t n)
Definition: mbtowc-impl.h:23