malloc-h: New module.
[gnulib.git] / lib / mbsnrtoc32s.c
blobc0f6e1fb8df1083efded87602a1fe615e7866906
1 /* Convert string to 32-bit wide string.
2 Copyright (C) 2020 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2020.
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.
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.
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/>. */
18 #include <config.h>
20 /* Specification. */
21 #include <uchar.h>
23 #include <wchar.h>
25 #if (HAVE_WORKING_MBRTOC32 && !defined __GLIBC__) || _GL_LARGE_CHAR32_T
26 /* The char32_t encoding of a multibyte character may be different than its
27 wchar_t encoding, or char32_t is wider than wchar_t. */
29 /* For Cygwin >= 1.7 it would be possible to speed this up a bit by cutting
30 the source into chunks, calling mbsnrtowcs on a chunk, then u16_to_u32 on
31 the result, then proceed with the next chunk, and so on.
32 But speed is not critical here so far. */
34 /* Reuse the implementation of mbsnrtowcs with a different parameterization. */
36 # include <errno.h>
37 # include <limits.h>
38 # include <stdlib.h>
40 # include "minmax.h"
41 # include "strnlen1.h"
43 extern mbstate_t _gl_mbsrtoc32s_state;
45 # define FUNC mbsnrtoc32s
46 # define DCHAR_T char32_t
47 # define INTERNAL_STATE _gl_mbsrtoc32s_state
48 # define MBRTOWC mbrtoc32
49 # include "mbsnrtowcs-impl.h"
51 #else
52 /* char32_t and wchar_t are equivalent. */
54 # include "verify.h"
56 verify (sizeof (char32_t) == sizeof (wchar_t));
58 size_t
59 mbsnrtoc32s (char32_t *dest, const char **srcp, size_t srclen, size_t len,
60 mbstate_t *ps)
62 return mbsnrtowcs ((wchar_t *) dest, srcp, srclen, len, ps);
65 #endif