locale/nl_langinfo_l.c

   1 /* User interface for extracting locale-dependent parameters.
   2    Copyright (C) 1995-2014 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <langinfo.h>
  20 #include <locale.h>
  21 #include <errno.h>
  22 #include <stddef.h>
  23 #include <stdlib.h>
  24 #include "localeinfo.h"
  25
  26
  27 /* Return a string with the data for locale-dependent parameter ITEM.  */
  28
  29 char *
  30 __nl_langinfo_l (item, l)
  31      nl_item item;
  32      __locale_t l;
  33 {
  34   int category = _NL_ITEM_CATEGORY (item);
  35   unsigned int index = _NL_ITEM_INDEX (item);
  36   const struct __locale_data *data;
  37
  38   if (category < 0 || category == LC_ALL || category >= __LC_LAST)
  39     /* Bogus category: bogus item.  */
  40     return (char *) "";
  41
  42   /* Special case value for NL_LOCALE_NAME (category).
  43      This is not a real item index in the string table.  */
  44   if (index == _NL_ITEM_INDEX (_NL_LOCALE_NAME (category)))
  45     return (char *) l->__names[category];
  46
  47 #if defined NL_CURRENT_INDIRECT
  48   /* Make direct reference to every _nl_current_CATEGORY symbol,
  49      since we know only at runtime which categories are used.  */
  50   switch (category)
  51     {
  52 # define DEFINE_CATEGORY(category, category_name, items, a) \
  53       case category: data = *_nl_current_##category; break;
  54 # include "categories.def"
  55 # undef DEFINE_CATEGORY
  56     default:                   /* Should be impossible.  */
  57       abort();
  58     }
  59 #else
  60   data = l->__locales[category];
  61 #endif
  62
  63   if (index >= data->nstrings)
  64     /* Bogus index for this category: bogus item.  */
  65     return (char *) "";
  66
  67   /* Return the string for the specified item.  */
  68   return (char *) data->values[index].string;
  69 }
  70 libc_hidden_def (__nl_langinfo_l)
  71 weak_alias (__nl_langinfo_l, nl_langinfo_l)