4 * Implementation of ISO-C99 wctob() function, supporting it on legacy
5 * Windows versions, for which MSVCRT.DLL doesn't provide it, and also
6 * replacing the Microsoft implementation, on Windows versions with an
7 * MSVCRT.DLL, or MSVCRn.DLL which does.
12 * Written by Keith Marshall <keith@users.osdn.me>
13 * Copyright (C) 2020, MinGW.org Project
16 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation
19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20 * and/or sell copies of the Software, and to permit persons to whom the
21 * Software is furnished to do so, subject to the following conditions:
23 * The above copyright notice, this permission notice, and the following
24 * disclaimer shall be included in all copies or substantial portions of
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
28 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
30 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
31 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
32 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OF OR OTHER
33 * DEALINGS IN THE SOFTWARE.
40 int wctob( wint_t wc )
41 { /* Implementation of ISO-C99 wctob() function, in libmingwex.a;
42 * after first storing the effective codeset index, this performs
43 * a wchar_t to MBCS conversion on the given single wide character
44 * argument, capturing the conversion into a local buffer, checks
45 * that the result occupies exactly one byte, for which the byte
46 * value is coerced to int and returned; otherwise returns EOF.
48 (void)(__mingw_wctomb_codeset_init());
49 union { unsigned char u; char c; } retval;
50 return (__mingw_wctomb_convert( &retval.c, 1, &wc, 1 ) == 1)
51 ? (int)(retval.u) : EOF;
54 /* FIXME: these aliases are provided for link-compatibitity with
55 * libraries compiled against mingwrt-5.3.x; they may be removed
56 * from future versions of mingwrt.
58 int __msvcrt_wctob( wint_t )__attribute__((__weak__,__alias__("wctob")));
59 int __mingw_wctob( wint_t )__attribute__((__weak__,__alias__("wctob")));
61 /* $RCSfile$: end of file */