locale/nl_langinfo.c

   1 /* User interface for extracting locale-dependent parameters.
   2    Copyright (C) 1995, 1996, 1997, 1999, 2000 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <langinfo.h>
  21 #include <errno.h>
  22 #include <stddef.h>
  23 #include "localeinfo.h"
  24
  25
  26 /* Return a string with the data for locale-dependent parameter ITEM.  */
  27
  28 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
  29 char *
  30 __nl_langinfo_l (item, l)
  31      nl_item item;
  32      __locale_t l;
  33 #else
  34 char *
  35 nl_langinfo (item)
  36      nl_item item;
  37 #endif
  38 {
  39   int category = _NL_ITEM_CATEGORY (item);
  40   unsigned int index = _NL_ITEM_INDEX (item);
  41   const struct locale_data *data;
  42
  43   if (category < 0 || category == LC_ALL || category >= __LC_LAST)
  44     /* Bogus category: bogus item.  */
  45     return (char *) "";
  46
  47 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
  48   data = l->__locales[category];
  49 #else
  50   data = *_nl_current[category];
  51 #endif
  52
  53   if (index >= data->nstrings)
  54     /* Bogus index for this category: bogus item.  */
  55     return (char *) "";
  56
  57   /* Return the string for the specified item.  */
  58   return (char *) data->values[index].string;
  59 }