/*      $NetBSD: explodename.c,v 1.1.1.1 2016/01/10 21:36:17 christos Exp $     */

/* Copyright (C) 1995-1998, 2000, 2001 Free Software Foundation, Inc.
  Contributed by Ulrich Drepper <[email protected]>, 1995.

  This program is free software; you can redistribute it and/or modify it
  under the terms of the GNU Library General Public License as published
  by the Free Software Foundation; either version 2, or (at your option)
  any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Library General Public License for more details.

  You should have received a copy of the GNU Library General Public
  License along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  USA.  */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <stdlib.h>
#include <string.h>
#include <sys/types.h>

#include "loadinfo.h"

/* On some strange systems still no definition of NULL is found.  Sigh!  */
#ifndef NULL
# if defined __STDC__ && __STDC__
#  define NULL ((void *) 0)
# else
#  define NULL 0
# endif
#endif

/* @@ end of prolog @@ */

char *
_nl_find_language (name)
    const char *name;
{
 while (name[0] != '\0' && name[0] != '_' && name[0] != '@'
        && name[0] != '+' && name[0] != ',')
   ++name;

 return (char *) name;
}


int
_nl_explode_name (name, language, modifier, territory, codeset,
                 normalized_codeset, special, sponsor, revision)
    char *name;
    const char **language;
    const char **modifier;
    const char **territory;
    const char **codeset;
    const char **normalized_codeset;
    const char **special;
    const char **sponsor;
    const char **revision;
{
 enum { undecided, xpg, cen } syntax;
 char *cp;
 int mask;

 *modifier = NULL;
 *territory = NULL;
 *codeset = NULL;
 *normalized_codeset = NULL;
 *special = NULL;
 *sponsor = NULL;
 *revision = NULL;

 /* Now we determine the single parts of the locale name.  First
    look for the language.  Termination symbols are `_' and `@' if
    we use XPG4 style, and `_', `+', and `,' if we use CEN syntax.  */
 mask = 0;
 syntax = undecided;
 *language = cp = name;
 cp = _nl_find_language (*language);

 if (*language == cp)
   /* This does not make sense: language has to be specified.  Use
      this entry as it is without exploding.  Perhaps it is an alias.  */
   cp = strchr (*language, '\0');
 else if (cp[0] == '_')
   {
     /* Next is the territory.  */
     cp[0] = '\0';
     *territory = ++cp;

     while (cp[0] != '\0' && cp[0] != '.' && cp[0] != '@'
            && cp[0] != '+' && cp[0] != ',' && cp[0] != '_')
       ++cp;

     mask |= TERRITORY;

     if (cp[0] == '.')
       {
         /* Next is the codeset.  */
         syntax = xpg;
         cp[0] = '\0';
         *codeset = ++cp;

         while (cp[0] != '\0' && cp[0] != '@')
           ++cp;

         mask |= XPG_CODESET;

         if (*codeset != cp && (*codeset)[0] != '\0')
           {
             *normalized_codeset = _nl_normalize_codeset (*codeset,
                                                          cp - *codeset);
             if (strcmp (*codeset, *normalized_codeset) == 0)
               free ((char *) *normalized_codeset);
             else
               mask |= XPG_NORM_CODESET;
           }
       }
   }

 if (cp[0] == '@' || (syntax != xpg && cp[0] == '+'))
   {
     /* Next is the modifier.  */
     syntax = cp[0] == '@' ? xpg : cen;
     cp[0] = '\0';
     *modifier = ++cp;

     while (syntax == cen && cp[0] != '\0' && cp[0] != '+'
            && cp[0] != ',' && cp[0] != '_')
       ++cp;

     mask |= XPG_MODIFIER | CEN_AUDIENCE;
   }

 if (syntax != xpg && (cp[0] == '+' || cp[0] == ',' || cp[0] == '_'))
   {
     syntax = cen;

     if (cp[0] == '+')
       {
         /* Next is special application (CEN syntax).  */
         cp[0] = '\0';
         *special = ++cp;

         while (cp[0] != '\0' && cp[0] != ',' && cp[0] != '_')
           ++cp;

         mask |= CEN_SPECIAL;
       }

     if (cp[0] == ',')
       {
         /* Next is sponsor (CEN syntax).  */
         cp[0] = '\0';
         *sponsor = ++cp;

         while (cp[0] != '\0' && cp[0] != '_')
           ++cp;

         mask |= CEN_SPONSOR;
       }

     if (cp[0] == '_')
       {
         /* Next is revision (CEN syntax).  */
         cp[0] = '\0';
         *revision = ++cp;

         mask |= CEN_REVISION;
       }
   }

 /* For CEN syntax values it might be important to have the
    separator character in the file name, not for XPG syntax.  */
 if (syntax == xpg)
   {
     if (*territory != NULL && (*territory)[0] == '\0')
       mask &= ~TERRITORY;

     if (*codeset != NULL && (*codeset)[0] == '\0')
       mask &= ~XPG_CODESET;

     if (*modifier != NULL && (*modifier)[0] == '\0')
       mask &= ~XPG_MODIFIER;
   }

 return mask;
}