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sortix--sortix/libc/mbstowcs.cpp
Jonas 'Sortie' Termansen 9e242e9cd7 Add mbstowcs(3).
2013-12-17 14:30:31 +01:00

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1.6 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013.
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/>.
mbstowcs.cpp
Convert a multibyte string to a wide-character string.
*******************************************************************************/
#include <stdlib.h>
#include <wchar.h>
extern "C" size_t mbstowcs(wchar_t* dst, const char* src, size_t n)
{
// Reset the secret conversion state variable in mbsrtowcs that is used when
// ps is NULL by successfully converting the empty string. As always, this
// is not multithread secure. For some reason, the standards don't mandate
// that the conversion state is reset when mbsrtowcs is called with ps=NULL,
// which arguably is a feature - but this function is supposed to do it.
const char* empty_string = "";
mbsrtowcs(NULL, &empty_string, 0, NULL);
return mbsrtowcs(dst, &src, n, NULL);
}