intl/explodename.c

   1 /* Copyright (C) 1995-1998, 2000, 2001, 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   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 #ifdef HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <sys/types.h>
  27
  28 #include "loadinfo.h"
  29
  30 /* On some strange systems still no definition of NULL is found.  Sigh!  */
  31 #ifndef NULL
  32 # if defined __STDC__ && __STDC__
  33 #  define NULL ((void *) 0)
  34 # else
  35 #  define NULL 0
  36 # endif
  37 #endif
  38
  39 /* @@ end of prolog @@ */
  40
  41 char *
  42 _nl_find_language (name)
  43      const char *name;
  44 {
  45   while (name[0] != '\0' && name[0] != '_' && name[0] != '@' && name[0] != '.')
  46     ++name;
  47
  48   return (char *) name;
  49 }
  50
  51
  52 int
  53 _nl_explode_name (name, language, modifier, territory, codeset,
  54                   normalized_codeset)
  55      char *name;
  56      const char **language;
  57      const char **modifier;
  58      const char **territory;
  59      const char **codeset;
  60      const char **normalized_codeset;
  61 {
  62   char *cp;
  63   int mask;
  64
  65   *modifier = NULL;
  66   *territory = NULL;
  67   *codeset = NULL;
  68   *normalized_codeset = NULL;
  69
  70   /* Now we determine the single parts of the locale name.  First
  71      look for the language.  Termination symbols are `_', '.', and `@'.  */
  72   mask = 0;
  73   *language = cp = name;
  74   cp = _nl_find_language (*language);
  75
  76   if (*language == cp)
  77     /* This does not make sense: language has to be specified.  Use
  78        this entry as it is without exploding.  Perhaps it is an alias.  */
  79     cp = strchr (*language, '\0');
  80   else if (cp[0] != '@')
  81     {
  82       if (cp[0] == '_')
  83         {
  84           /* Next is the territory.  */
  85           cp[0] = '\0';
  86           *territory = ++cp;
  87
  88           while (cp[0] != '\0' && cp[0] != '.' && cp[0] != '@')
  89             ++cp;
  90
  91           mask |= XPG_TERRITORY;
  92         }
  93
  94       if (cp[0] == '.')
  95         {
  96           /* Next is the codeset.  */
  97           cp[0] = '\0';
  98           *codeset = ++cp;
  99
 100           while (cp[0] != '\0' && cp[0] != '@')
 101             ++cp;
 102
 103           mask |= XPG_CODESET;
 104
 105           if (*codeset != cp && (*codeset)[0] != '\0')
 106             {
 107               *normalized_codeset = _nl_normalize_codeset (*codeset,
 108                                                            cp - *codeset);
 109               if (strcmp (*codeset, *normalized_codeset) == 0)
 110                 free ((char *) *normalized_codeset);
 111               else
 112                 mask |= XPG_NORM_CODESET;
 113             }
 114         }
 115     }
 116
 117   if (cp[0] == '@')
 118     {
 119       /* Next is the modifier.  */
 120       cp[0] = '\0';
 121       *modifier = ++cp;
 122
 123       if (cp[0] != '\0')
 124         mask |= XPG_MODIFIER;
 125     }
 126
 127   if (*territory != NULL && (*territory)[0] == '\0')
 128     mask &= ~XPG_TERRITORY;
 129
 130   if (*codeset != NULL && (*codeset)[0] == '\0')
 131     mask &= ~XPG_CODESET;
 132
 133   return mask;
 134 }