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sortix--sortix/libc/mblen.cpp
Jonas 'Sortie' Termansen ee4acf731c Add mblen(3).
2013-12-17 14:30:33 +01:00

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1.4 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/>.
mblen.cpp
Determine number of bytes in next multibyte character.
*******************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
extern "C" int mblen(const char* s, size_t n)
{
static mbstate_t ps;
if ( !s )
{
memset(&ps, 0, sizeof(ps));
return 0; // TODO: Give the correct return value depending on ps.
}
size_t ret = mbrlen(s, n, &ps);
if ( ret == (size_t) -2 )
return -1;
if ( ret == (size_t) -1 )
return -1;
return (int) ret;
}