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/* Handle list of needed message catalogs

   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.

   Written 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 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 General Public License for more details.

   You should have received a copy of the GNU 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 <ctype.h>

#include <errno.h>

#include <stdio.h>

#include <sys/types.h>

#if defined STDC_HEADERS || defined _LIBC

# include <stdlib.h>

#else

# ifdef HAVE_MALLOC_H

#  include <malloc.h>

# else

void free ();

# endif

#endif

#if defined HAVE_STRING_H || defined _LIBC

# include <string.h>

#else

# include <strings.h>

# ifndef memcpy

#  define memcpy(Dst, Src, Num) bcopy (Src, Dst, Num)

# endif

#endif

#if !HAVE_STRCHR && !defined _LIBC

# ifndef strchr

#  define strchr index

# endif

#endif

#if defined HAVE_UNISTD_H || defined _LIBC

# include <unistd.h>

#endif

#include "gettext.h"

#include "gettextP.h"

#ifdef _LIBC

# include <libintl.h>

#else

# include "libgettext.h"

#endif

/* @@ end of prolog @@ */

/* List of already loaded domains.  */

static struct loaded_l10nfile *_nl_loaded_domains;

/* Return a data structure describing the message catalog described by

   the DOMAINNAME and CATEGORY parameters with respect to the currently

   established bindings.  */

struct loaded_l10nfile *

_nl_find_domain (dirname, locale, domainname)

     const char *dirname;

     char *locale;

     const char *domainname;

{

  struct loaded_l10nfile *retval;

  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;

  const char *alias_value;

  int mask;

  /* LOCALE can consist of up to four recognized parts for the XPG syntax:

                language[_territory[.codeset]][@modifier]

     and six parts for the CEN syntax:

        language[_territory][+audience][+special][,[sponsor][_revision]]

     Beside the first all of them are allowed to be missing.  If the

     full specified locale is not found, the less specific one are

     looked for.  The various part will be stripped of according to

     the following order:

                (1) revision

                (2) sponsor

                (3) special

                (4) codeset

                (5) normalized codeset

                (6) territory

                (7) audience/modifier

   */

  /* If we have already tested for this locale entry there has to

     be one data set in the list of loaded domains.  */

  retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,

                               strlen (dirname) + 1, 0, locale, NULL, NULL,

                               NULL, NULL, NULL, NULL, NULL, domainname, 0);

  if (retval != NULL)

    {

      /* We know something about this locale.  */

      int cnt;

      if (retval->decided == 0)

        _nl_load_domain (retval);

      if (retval->data != NULL)

        return retval;

      for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)

        {

          if (retval->successor[cnt]->decided == 0)

            _nl_load_domain (retval->successor[cnt]);

          if (retval->successor[cnt]->data != NULL)

            break;

        }

      return cnt >= 0 ? retval : NULL;

      /* NOTREACHED */

    }

  /* See whether the locale value is an alias.  If yes its value

     *overwrites* the alias name.  No test for the original value is

     done.  */

  alias_value = _nl_expand_alias (locale);

  if (alias_value != NULL)

    {

      size_t len = strlen (alias_value) + 1;

      locale = (char *) malloc (len);

      if (locale == NULL)

        return NULL;

      memcpy (locale, alias_value, len);

    }

  /* 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 = _nl_explode_name (locale, &language, &modifier, &territory,

                           &codeset, &normalized_codeset, &special,

                           &sponsor, &revision);

  /* Create all possible locale entries which might be interested in

     generalization.  */

  retval = _nl_make_l10nflist (&_nl_loaded_domains, dirname,

                               strlen (dirname) + 1, mask, language, territory,

                               codeset, normalized_codeset, modifier, special,

                               sponsor, revision, domainname, 1);

  if (retval == NULL)

    /* This means we are out of core.  */

    return NULL;

  if (retval->decided == 0)

    _nl_load_domain (retval);

  if (retval->data == NULL)

    {

      int cnt;

      for (cnt = 0; retval->successor[cnt] != NULL; ++cnt)

        {

          if (retval->successor[cnt]->decided == 0)

            _nl_load_domain (retval->successor[cnt]);

          if (retval->successor[cnt]->data != NULL)

            break;

        }

    }

  /* The room for an alias was dynamically allocated.  Free it now.  */

  if (alias_value != NULL)

    free (locale);

  return retval;

}