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/* Convert string to 32-bit wide string.
Copyright (C) 2020-2021 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2020.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 3 of the
License, or (at your option) any later version.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <uchar.h>
#include <wchar.h>
#if (HAVE_WORKING_MBRTOC32 && !defined __GLIBC__) || _GL_LARGE_CHAR32_T
/* The char32_t encoding of a multibyte character may be different than its
wchar_t encoding, or char32_t is wider than wchar_t. */
/* For Cygwin >= 1.7 it would be possible to speed this up a bit by cutting
the source into chunks, calling mbsnrtowcs on a chunk, then u16_to_u32 on
the result, then proceed with the next chunk, and so on.
But speed is not critical here so far. */
/* Reuse the implementation of mbsnrtowcs with a different parameterization. */
# include <errno.h>
# include <limits.h>
# include <stdlib.h>
# include "minmax.h"
# include "strnlen1.h"
extern mbstate_t _gl_mbsrtoc32s_state;
# define FUNC mbsnrtoc32s
# define DCHAR_T char32_t
# define INTERNAL_STATE _gl_mbsrtoc32s_state
# define MBRTOWC mbrtoc32
# include "mbsnrtowcs-impl.h"
#else
/* char32_t and wchar_t are equivalent. */
# include "verify.h"
verify (sizeof (char32_t) == sizeof (wchar_t));
size_t
mbsnrtoc32s (char32_t *dest, const char **srcp, size_t srclen, size_t len,
mbstate_t *ps)
{
return mbsnrtowcs ((wchar_t *) dest, srcp, srclen, len, ps);
}
#endif
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