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, 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 static char *_nl_find_language PARAMS ((const char *name));
  42
  43 static char *
  44 _nl_find_language (name)
  45      const char *name;
  46 {
  47   while (name[0] != '\0' && name[0] != '_' && name[0] != '@' && name[0] != '.')
  48     ++name;
  49
  50   return (char *) name;
  51 }
  52
  53
  54 int
  55 _nl_explode_name (name, language, modifier, territory, codeset,
  56                   normalized_codeset)
  57      char *name;
  58      const char **language;
  59      const char **modifier;
  60      const char **territory;
  61      const char **codeset;
  62      const char **normalized_codeset;
  63 {
  64   char *cp;
  65   int mask;
  66
  67   *modifier = NULL;
  68   *territory = NULL;
  69   *codeset = NULL;
  70   *normalized_codeset = NULL;
  71
  72   /* Now we determine the single parts of the locale name.  First
  73      look for the language.  Termination symbols are `_', '.', and `@'.  */
  74   mask = 0;
  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 = __rawmemchr (*language, '\0');
  82   else if (cp[0] != '@')
  83     {
  84       if (cp[0] == '_')
  85         {
  86           /* Next is the territory.  */
  87           cp[0] = '\0';
  88           *territory = ++cp;
  89
  90           while (cp[0] != '\0' && cp[0] != '.' && cp[0] != '@')
  91             ++cp;
  92
  93           mask |= XPG_TERRITORY;
  94         }
  95
  96       if (cp[0] == '.')
  97         {
  98           /* Next is the codeset.  */
  99           cp[0] = '\0';
 100           *codeset = ++cp;
 101
 102           while (cp[0] != '\0' && cp[0] != '@')
 103             ++cp;
 104
 105           mask |= XPG_CODESET;
 106
 107           if (*codeset != cp && (*codeset)[0] != '\0')
 108             {
 109               *normalized_codeset = _nl_normalize_codeset (*codeset,
 110                                                            cp - *codeset);
 111               if (*normalized_codeset == NULL)
 112                 return -1;
 113               else if (strcmp (*codeset, *normalized_codeset) == 0)
 114                 free ((char *) *normalized_codeset);
 115               else
 116                 mask |= XPG_NORM_CODESET;
 117             }
 118         }
 119     }
 120
 121   if (cp[0] == '@')
 122     {
 123       /* Next is the modifier.  */
 124       cp[0] = '\0';
 125       *modifier = ++cp;
 126
 127       if (cp[0] != '\0')
 128         mask |= XPG_MODIFIER;
 129     }
 130
 131   if (*territory != NULL && (*territory)[0] == '\0')
 132     mask &= ~XPG_TERRITORY;
 133
 134   if (*codeset != NULL && (*codeset)[0] == '\0')
 135     mask &= ~XPG_CODESET;
 136
 137   return mask;
 138 }