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      1 /* Copyright (C) 1995-1998, 2000-2001, 2003, 2005 Free Software Foundation, Inc.
      2    Contributed by Ulrich Drepper <drepper (at) 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 }
    134