locale/nl_langinfo.c

   1 /* User interface for extracting locale-dependent parameters.
   2    Copyright (C) 1995,96,97,99,2000,2001,2002,2005
   3         Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <langinfo.h>
  22 #include <locale.h>
  23 #include <errno.h>
  24 #include <stddef.h>
  25 #include "localeinfo.h"
  26
  27
  28 /* Return a string with the data for locale-dependent parameter ITEM.  */
  29
  30 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
  31 char *
  32 __nl_langinfo_l (item, l)
  33      nl_item item;
  34      __locale_t l;
  35 #else
  36 char *
  37 nl_langinfo (item)
  38      nl_item item;
  39 #endif
  40 {
  41   int category = _NL_ITEM_CATEGORY (item);
  42   unsigned int index = _NL_ITEM_INDEX (item);
  43   const struct locale_data *data;
  44
  45   if (category < 0 || category == LC_ALL || category >= __LC_LAST)
  46     /* Bogus category: bogus item.  */
  47     return (char *) "";
  48
  49   /* Special case value for NL_LOCALE_NAME (category).
  50      This is not a real item index in the string table.  */
  51   if (index == _NL_ITEM_INDEX (_NL_LOCALE_NAME (category)))
  52     {
  53 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
  54 # define THISLOCALE l
  55 #else
  56 # define THISLOCALE _NL_CURRENT_LOCALE
  57 #endif
  58       return (char *) THISLOCALE->__names[category];
  59     }
  60
  61 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
  62   data = l->__locales[category];
  63 #elif defined NL_CURRENT_INDIRECT
  64   /* Make direct reference to every _nl_current_CATEGORY symbol,
  65      since we know only at runtime which categories are used.  */
  66   switch (category)
  67     {
  68 # define DEFINE_CATEGORY(category, category_name, items, a) \
  69       case category: data = *_nl_current_##category; break;
  70 # include "categories.def"
  71 # undef DEFINE_CATEGORY
  72     default:                    /* Should be impossible.  */
  73       return (char *) "";
  74     }
  75 #else
  76   data = _NL_CURRENT_DATA (category);
  77 #endif
  78
  79   if (index >= data->nstrings)
  80     /* Bogus index for this category: bogus item.  */
  81     return (char *) "";
  82
  83   /* Return the string for the specified item.  */
  84   return (char *) data->values[index].string;
  85 }
  86 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
  87 weak_alias (__nl_langinfo_l, nl_langinfo_l)
  88 #else
  89 libc_hidden_def (nl_langinfo)
  90 #endif