vorbis-tools-1.2.0/intl/explodename.c

   1 /* Copyright (C) 1995-1998, 2000-2001, 2003, 2005 Free Software Foundation, Inc.
   2    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
   3
   4    This program is free software; you can redistribute it and/or modify it
   5    under the terms of the GNU Library General Public License as published
   6    by the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with this program; if not, write to the Free Software
  16    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17    USA.  */
  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 /* Split a locale name NAME into a leading language part and all the
  41    rest.  Return a pointer to the first character after the language,
  42    i.e. to the first byte of the rest.  */
  43 static char *_nl_find_language (const char *name);
  44
  45 static char *
  46 _nl_find_language (const char *name)
  47 {
  48   while (name[0] != '\0' && name[0] != '_' && name[0] != '@' && name[0] != '.')
  49     ++name;
  50
  51   return (char *) name;
  52 }
  53
  54
  55 int
  56 _nl_explode_name (char *name,
  57                   const char **language, const char **modifier,
  58                   const char **territory, const char **codeset,
  59                   const char **normalized_codeset)
  60 {
  61   char *cp;
  62   int mask;
  63
  64   *modifier = NULL;
  65   *territory = NULL;
  66   *codeset = NULL;
  67   *normalized_codeset = NULL;
  68
  69   /* Now we determine the single parts of the locale name.  First
  70      look for the language.  Termination symbols are `_', '.', and `@'.  */
  71   mask = 0;
  72   *language = cp = name;
  73   cp = _nl_find_language (*language);
  74
  75   if (*language == cp)
  76     /* This does not make sense: language has to be specified.  Use
  77        this entry as it is without exploding.  Perhaps it is an alias.  */
  78     cp = strchr (*language, '\0');
  79   else
  80     {
  81       if (cp[0] == '_')
  82         {
  83           /* Next is the territory.  */
  84           cp[0] = '\0';
  85           *territory = ++cp;
  86
  87           while (cp[0] != '\0' && cp[0] != '.' && cp[0] != '@')
  88             ++cp;
  89
  90           mask |= XPG_TERRITORY;
  91         }
  92
  93       if (cp[0] == '.')
  94         {
  95           /* Next is the codeset.  */
  96           cp[0] = '\0';
  97           *codeset = ++cp;
  98
  99           while (cp[0] != '\0' && cp[0] != '@')
 100             ++cp;
 101
 102           mask |= XPG_CODESET;
 103
 104           if (*codeset != cp && (*codeset)[0] != '\0')
 105             {
 106               *normalized_codeset = _nl_normalize_codeset (*codeset,
 107                                                            cp - *codeset);
 108               if (strcmp (*codeset, *normalized_codeset) == 0)
 109                 free ((char *) *normalized_codeset);
 110               else
 111                 mask |= XPG_NORM_CODESET;
 112             }
 113         }
 114     }
 115
 116   if (cp[0] == '@')
 117     {
 118       /* Next is the modifier.  */
 119       cp[0] = '\0';
 120       *modifier = ++cp;
 121
 122       if (cp[0] != '\0')
 123         mask |= XPG_MODIFIER;
 124     }
 125
 126   if (*territory != NULL && (*territory)[0] == '\0')
 127     mask &= ~XPG_TERRITORY;
 128
 129   if (*codeset != NULL && (*codeset)[0] == '\0')
 130     mask &= ~XPG_CODESET;
 131
 132   return mask;
 133 }