locale/nl_langinfo.c

   1 /* User interface for extracting locale-dependent parameters.
   2    Copyright (C) 1995,96,97,99,2000,01,02 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <langinfo.h>
  21 #include <locale.h>
  22 #include <errno.h>
  23 #include <stddef.h>
  24 #include "localeinfo.h"
  25
  26
  27 /* Return a string with the data for locale-dependent parameter ITEM.  */
  28
  29 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
  30 char *
  31 __nl_langinfo_l (item, l)
  32      nl_item item;
  33      __locale_t l;
  34 #else
  35 char *
  36 nl_langinfo (item)
  37      nl_item item;
  38 #endif
  39 {
  40   int category = _NL_ITEM_CATEGORY (item);
  41   unsigned int index = _NL_ITEM_INDEX (item);
  42   const struct locale_data *data;
  43
  44   if (category < 0 || category == LC_ALL || category >= __LC_LAST)
  45     /* Bogus category: bogus item.  */
  46     return (char *) "";
  47
  48 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
  49   data = l->__locales[category];
  50 #elif defined NL_CURRENT_INDIRECT
  51   /* Make direct reference to every _nl_current_CATEGORY symbol,
  52      since we know only at runtime which categories are used.  */
  53   switch (category)
  54     {
  55 # define DEFINE_CATEGORY(category, category_name, items, a) \
  56       case category: data = *_nl_current_##category; break;
  57 # include "categories.def"
  58 # undef DEFINE_CATEGORY
  59     default:                    /* Should be impossible.  */
  60       return (char *) "";
  61     }
  62 #else
  63   data = _NL_CURRENT_DATA (category);
  64 #endif
  65
  66   if (index >= data->nstrings)
  67     /* Bogus index for this category: bogus item.  */
  68     return (char *) "";
  69
  70   /* Return the string for the specified item.  */
  71   return (char *) data->values[index].string;
  72 }
  73 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
  74 weak_alias (__nl_langinfo_l, nl_langinfo_l)
  75 #else
  76 libc_hidden_def (nl_langinfo)
  77 #endif