68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* Convert unibyte character to 32-bit wide character.
|
|
Copyright (C) 2020-2024 Free Software Foundation, Inc.
|
|
|
|
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 2.1 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/>. */
|
|
|
|
/* Written by Bruno Haible <bruno@clisp.org>, 2020. */
|
|
|
|
#include <config.h>
|
|
|
|
#define IN_BTOC32
|
|
/* Specification. */
|
|
#include <uchar.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <wchar.h>
|
|
|
|
#if GL_CHAR32_T_IS_UNICODE
|
|
# include "lc-charset-unicode.h"
|
|
#endif
|
|
|
|
#if _GL_WCHAR_T_IS_UCS4
|
|
_GL_EXTERN_INLINE
|
|
#endif
|
|
wint_t
|
|
btoc32 (int c)
|
|
{
|
|
#if HAVE_WORKING_MBRTOC32 && HAVE_WORKING_C32RTOMB && !_GL_WCHAR_T_IS_UCS4
|
|
/* The char32_t encoding of a multibyte character may be different than its
|
|
wchar_t encoding. */
|
|
if (c != EOF)
|
|
{
|
|
mbstate_t state;
|
|
char s[1];
|
|
char32_t wc;
|
|
|
|
mbszero (&state);
|
|
s[0] = (unsigned char) c;
|
|
if (mbrtoc32 (&wc, s, 1, &state) <= 1)
|
|
return wc;
|
|
}
|
|
return WEOF;
|
|
#else
|
|
/* In all known locale encodings, unibyte characters correspond only to
|
|
characters in the BMP. */
|
|
wint_t wc = btowc (c);
|
|
# if GL_CHAR32_T_IS_UNICODE && GL_CHAR32_T_VS_WCHAR_T_NEEDS_CONVERSION
|
|
if (wc != WEOF && wc != 0)
|
|
{
|
|
wc = locale_encoding_to_unicode (wc);
|
|
if (wc == 0)
|
|
return WEOF;
|
|
}
|
|
# endif
|
|
return wc;
|
|
#endif
|
|
}
|