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/* Copyright (C) 1995-1998, 2000, 2001 Free Software Foundation, Inc.

   Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,

   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;

}