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sortix--sortix/libc/stdlib/mbtowc.cpp
2014-11-24 17:41:26 +01:00

43 lines
1.5 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2014.
This file is part of the Sortix C Library.
The Sortix C Library 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.
The Sortix C Library 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 the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
stdlib/mbtowc.cpp
Convert a multibyte sequence to a wide character.
*******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
// TODO: This function is unpure and should be removed.
extern "C" int mbtowc(wchar_t* pwc, const char* s, size_t n)
{
static mbstate_t ps;
size_t result = mbrtowc(pwc, s, n, &ps);
if ( !s )
memset(&ps, 0, sizeof(ps));
if ( result == (size_t) -1 )
return memset(&ps, 0, sizeof(ps)), -1;
// TODO: Should ps be cleared to zero in this case?
if ( result == (size_t) -2 )
return -1;
return (int) result;
}