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Add wcstombs(3).

This commit is contained in:
Jonas 'Sortie' Termansen 2013-03-24 01:39:43 +01:00
parent 8e0d659cec
commit cab4293090
3 changed files with 41 additions and 2 deletions
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1
libc/Makefile
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@ -145,6 +145,7 @@ wcsrchr.o \
wcsrtombs.o \
wcsspn.o \
wcstok.o \
wcstombs.o \
wctomb.o \
wctype.o \

4
libc/include/stdlib.h
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@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
This file is part of the Sortix C Library.
@ -100,6 +100,7 @@ unsigned long long strtoull(const char* restrict, char** restrict, int);
long long strtoll(const char* restrict, char** restrict, int);
int system(const char*);
int unsetenv(const char*);
size_t wcstombs(char* restrict, const wchar_t *restrict, size_t);
int wctomb(char*, wchar_t);
#if defined(_SORTIX_SOURCE) || defined(_WANT_SORTIX_ENV)
@ -149,7 +150,6 @@ double strtod(const char* restrict, char** restrict);
float strtof(const char* restrict, char** restrict);
long double strtold(const char* restrict, char** restrict);
int unlockpt(int);
size_t wcstombs(char* restrict, const wchar_t *restrict, size_t);
#if __POSIX_OBSOLETE <= 200801
int rand_r(unsigned *);

38
libc/wcstombs.cpp Normal file
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@ -0,0 +1,38 @@
/*******************************************************************************
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/>.
wcstombs.cpp
Convert a wide-character string to multibyte string.
*******************************************************************************/
#include <stdlib.h>
#include <wchar.h>
extern "C" size_t wcstombs(char* dst, const wchar_t* src, size_t n)
{
// Reset the secret conversion state variable in wcsrtombs 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 wcsrtombs is called with ps=NULL,
// which arguably is a feature - but this function is supposed to do it.
const wchar_t* empty_string = L"";
wcsrtombs(NULL, &empty_string, 0, NULL);
return wcsrtombs(dst, &src, n, NULL);
}