intl/explodename.c

   1 /* Copyright (C) 1995-1998, 2000-2001, 2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  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 char *
  41 _nl_find_language (const char *name)
  42 {
  43   while (name[0] != '\0' && name[0] != '_' && name[0] != '@'
  44          && name[0] != '+' && name[0] != ',')
  45     ++name;
  46
  47   return (char *) name;
  48 }
  49
  50
  51 int
  52 _nl_explode_name (char *name,
  53                   const char **language, const char **modifier,
  54                   const char **territory, const char **codeset,
  55                   const char **normalized_codeset, const char **special,
  56                   const char **sponsor, const char **revision)
  57 {
  58   enum { undecided, xpg, cen } syntax;
  59   char *cp;
  60   int mask;
  61
  62   *modifier = NULL;
  63   *territory = NULL;
  64   *codeset = NULL;
  65   *normalized_codeset = NULL;
  66   *special = NULL;
  67   *sponsor = NULL;
  68   *revision = NULL;
  69
  70   /* Now we determine the single parts of the locale name.  First
  71      look for the language.  Termination symbols are `_' and `@' if
  72      we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
  73   mask = 0;
  74   syntax = undecided;
  75   *language = cp = name;
  76   cp = _nl_find_language (*language);
  77
  78   if (*language == cp)
  79     /* This does not make sense: language has to be specified.  Use
  80        this entry as it is without exploding.  Perhaps it is an alias.  */
  81     cp = strchr (*language, '\0');
  82   else 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[0] != '+' && cp[0] != ',' && cp[0] != '_')
  90         ++cp;
  91
  92       mask |= TERRITORY;
  93
  94       if (cp[0] == '.')
  95         {
  96           /* Next is the codeset.  */
  97           syntax = xpg;
  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 (strcmp (*codeset, *normalized_codeset) == 0)
 111                 free ((char *) *normalized_codeset);
 112               else
 113                 mask |= XPG_NORM_CODESET;
 114             }
 115         }
 116     }
 117
 118   if (cp[0] == '@' || (syntax != xpg && cp[0] == '+'))
 119     {
 120       /* Next is the modifier.  */
 121       syntax = cp[0] == '@' ? xpg : cen;
 122       cp[0] = '\0';
 123       *modifier = ++cp;
 124
 125       while (syntax == cen && cp[0] != '\0' && cp[0] != '+'
 126              && cp[0] != ',' && cp[0] != '_')
 127         ++cp;
 128
 129       mask |= XPG_MODIFIER | CEN_AUDIENCE;
 130     }
 131
 132   if (syntax != xpg && (cp[0] == '+' || cp[0] == ',' || cp[0] == '_'))
 133     {
 134       syntax = cen;
 135
 136       if (cp[0] == '+')
 137         {
 138           /* Next is special application (CEN syntax).  */
 139           cp[0] = '\0';
 140           *special = ++cp;
 141
 142           while (cp[0] != '\0' && cp[0] != ',' && cp[0] != '_')
 143             ++cp;
 144
 145           mask |= CEN_SPECIAL;
 146         }
 147
 148       if (cp[0] == ',')
 149         {
 150           /* Next is sponsor (CEN syntax).  */
 151           cp[0] = '\0';
 152           *sponsor = ++cp;
 153
 154           while (cp[0] != '\0' && cp[0] != '_')
 155             ++cp;
 156
 157           mask |= CEN_SPONSOR;
 158         }
 159
 160       if (cp[0] == '_')
 161         {
 162           /* Next is revision (CEN syntax).  */
 163           cp[0] = '\0';
 164           *revision = ++cp;
 165
 166           mask |= CEN_REVISION;
 167         }
 168     }
 169
 170   /* For CEN syntax values it might be important to have the
 171      separator character in the file name, not for XPG syntax.  */
 172   if (syntax == xpg)
 173     {
 174       if (*territory != NULL && (*territory)[0] == '\0')
 175         mask &= ~TERRITORY;
 176
 177       if (*codeset != NULL && (*codeset)[0] == '\0')
 178         mask &= ~XPG_CODESET;
 179
 180       if (*modifier != NULL && (*modifier)[0] == '\0')
 181         mask &= ~XPG_MODIFIER;
 182     }
 183
 184   return mask;
 185 }