intl/explodename.c

   1 /* Copyright (C) 1995-2002, 2003, 2006, 2007 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 # include <config.h>
  21 #endif
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <sys/types.h>
  26
  27 #include "loadinfo.h"
  28
  29 /* On some strange systems still no definition of NULL is found.  Sigh!  */
  30 #ifndef NULL
  31 # if defined __STDC__ && __STDC__
  32 #  define NULL ((void *) 0)
  33 # else
  34 #  define NULL 0
  35 # endif
  36 #endif
  37
  38 /* @@ end of prolog @@ */
  39
  40 static char *_nl_find_language PARAMS ((const char *name));
  41
  42 static char *
  43 _nl_find_language (name)
  44      const char *name;
  45 {
  46   while (name[0] != '\0' && name[0] != '_' && name[0] != '@' && name[0] != '.')
  47     ++name;
  48
  49   return (char *) name;
  50 }
  51
  52
  53 int
  54 _nl_explode_name (name, language, modifier, territory, codeset,
  55                   normalized_codeset)
  56      char *name;
  57      const char **language;
  58      const char **modifier;
  59      const char **territory;
  60      const char **codeset;
  61      const char **normalized_codeset;
  62 {
  63   char *cp;
  64   int mask;
  65
  66   *modifier = NULL;
  67   *territory = NULL;
  68   *codeset = NULL;
  69   *normalized_codeset = NULL;
  70
  71   /* Now we determine the single parts of the locale name.  First
  72      look for the language.  Termination symbols are `_', '.', and `@'.  */
  73   mask = 0;
  74   *language = cp = name;
  75   cp = _nl_find_language (*language);
  76
  77   if (*language == cp)
  78     /* This does not make sense: language has to be specified.  Use
  79        this entry as it is without exploding.  Perhaps it is an alias.  */
  80     cp = __rawmemchr (*language, '\0');
  81   else if (cp[0] != '@')
  82     {
  83       if (cp[0] == '_')
  84         {
  85           /* Next is the territory.  */
  86           cp[0] = '\0';
  87           *territory = ++cp;
  88
  89           while (cp[0] != '\0' && cp[0] != '.' && cp[0] != '@')
  90             ++cp;
  91
  92           mask |= XPG_TERRITORY;
  93         }
  94
  95       if (cp[0] == '.')
  96         {
  97           /* Next is the codeset.  */
  98           cp[0] = '\0';
  99           *codeset = ++cp;
 100
 101           while (cp[0] != '\0' && cp[0] != '@')
 102             ++cp;
 103
 104           mask |= XPG_CODESET;
 105
 106           if (*codeset != cp && (*codeset)[0] != '\0')
 107             {
 108               *normalized_codeset = _nl_normalize_codeset (*codeset,
 109                                                            cp - *codeset);
 110               if (*normalized_codeset == NULL)
 111                 return -1;
 112               else if (strcmp (*codeset, *normalized_codeset) == 0)
 113                 free ((char *) *normalized_codeset);
 114               else
 115                 mask |= XPG_NORM_CODESET;
 116             }
 117         }
 118     }
 119
 120   if (cp[0] == '@')
 121     {
 122       /* Next is the modifier.  */
 123       cp[0] = '\0';
 124       *modifier = ++cp;
 125
 126       if (cp[0] != '\0')
 127         mask |= XPG_MODIFIER;
 128     }
 129
 130   if (*territory != NULL && (*territory)[0] == '\0')
 131     mask &= ~XPG_TERRITORY;
 132
 133   if (*codeset != NULL && (*codeset)[0] == '\0')
 134     mask &= ~XPG_CODESET;
 135
 136   return mask;
 137 }