View of xos/usr/lib/libc/locale.c

/* Copyright (C) 2008  Emmanuel Varoquaux
 
   This file is part of XOS.
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
 
   This program 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 General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
#include <locale.h>
 
#include <string.h>
 
#define LOCALENAME_MAX 255
 
struct locale_struct {
  char name[LOCALENAME_MAX + 1];
};
 
static struct locale_struct __locale_C = {
  .name = "C"
};
 
static struct locale_struct *__current_locale[] = {
  &__locale_C, /* LC_CTYPE */
  &__locale_C, /* LC_NUMERIC */
  &__locale_C, /* LC_TIME */
  &__locale_C, /* LC_COLLATE */
  &__locale_C, /* LC_MONETARY */
  &__locale_C  /* LC_ALL */
};
 
static const size_t __category_count = sizeof __current_locale / sizeof __current_locale[0];
 
static struct locale_struct *__get_locale(const char *name)
{
  if (!strcmp(name, "C"))
    return &__locale_C;
  else if (!strcmp(name, "POSIX"))
    return &__locale_C;
  else
    return NULL;
}
 
char __attribute__ ((weak, visibility ("default"))) *setlocale(int category, const char *locale)
{
  struct locale_struct *_locale;
 
  if (category < 0 || (size_t)category >= __category_count)
    return NULL;
  if (locale) {
    if (!(_locale = __get_locale(locale)))
      return NULL;
    __current_locale[category] = _locale;
  }
  return __current_locale[category]->name;
}