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sortix--sortix/libc/locale/setlocale.cpp
Jonas 'Sortie' Termansen 3361620d83 Thread-secure setlocale(3).
2014-07-08 17:41:52 +02:00

66 lines
2.1 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 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/>.
locale/setlocale.cpp
Set program locale.
*******************************************************************************/
#define __SORTIX_STDLIB_REDIRECTS 0
#include <errno.h>
#include <locale.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
static pthread_mutex_t locale_lock = PTHREAD_MUTEX_INITIALIZER;
static char* current_locales[LC_NUM_CATEGORIES] = { NULL };
extern "C" const char* sortix_setlocale(int category, const char* locale)
{
if ( category < 0 || LC_ALL < category )
return errno = EINVAL, (const char*) NULL;
char* new_strings[LC_NUM_CATEGORIES];
int from = category != LC_ALL ? category : 0;
int to = category != LC_ALL ? category : LC_NUM_CATEGORIES - 1;
if ( !locale )
return current_locales[to] ? current_locales[to] : "C";
for ( int i = from; i <= to; i++ )
{
if ( !(new_strings[i] = strdup(locale)) )
{
for ( int n = from; n < i; n++ )
free(new_strings[n]);
return NULL;
}
}
pthread_mutex_lock(&locale_lock);
for ( int i = from; i <= to; i++ )
{
free(current_locales[i]);
current_locales[i] = new_strings[i];
}
pthread_mutex_unlock(&locale_lock);
return locale;
}
extern "C" char* setlocale(int category, const char* locale)
{
return (char*) sortix_setlocale(category, locale);
}