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Add mblen(3).

This commit is contained in:
Jonas 'Sortie' Termansen 2013-04-22 10:16:09 +02:00
parent bf66d5bb76
commit ee4acf731c
3 changed files with 45 additions and 1 deletions
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1
libc/Makefile
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@ -78,6 +78,7 @@ ldiv.o \
lldiv.o \
localtime.o \
localtime_r.o \
mblen.o \
mbrlen.o \
mbrtowc.o \
mbsrtowcs.o \

2
libc/include/stdlib.h
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@ -81,6 +81,7 @@ ldiv_t ldiv(long, long);
long long llabs(long long);
lldiv_t lldiv(long long, long long);
void* malloc(size_t);
int mblen(const char*, size_t);
size_t mbstowcs(wchar_t* __restrict, const char* __restrict, size_t);
int mbtowc(wchar_t *__restrict, const char* __restrict, size_t);
#if !defined(_SORTIX_SOURCE)
@ -132,7 +133,6 @@ long jrand48(unsigned short [3]);
char* l64a(long);
void lcong48(unsigned short [7]);
long lrand48(void);
int mblen(const char*, size_t);
char* mkdtemp(char*);
int mkstemp(char*);
long mrand48(void);

43
libc/mblen.cpp Normal file
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@ -0,0 +1,43 @@
/*******************************************************************************
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;
}