/* expand-group.c - expand GPG group definitions

 * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,

 *               2008, 2009, 2010 Free Software Foundation, Inc.

 *

 * This file is part of GnuPG.

 *

 * GnuPG 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 3 of the License, or

 * (at your option) any later version.

 *

 * GnuPG 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, see <https://www.gnu.org/licenses/>.

 */

#include <config.h>

#include "gpg.h"

#include "options.h"

#include "keydb.h"

int

expand_id (const char *id, strlist_t *into, unsigned int flags)

{

  struct groupitem *groups;

  int count=0;

  for (groups = opt.grouplist; groups; groups=groups->next)

    {

      /* need strcasecmp() here, as this should be localized */

      if (strcasecmp (groups->name,id) == 0)

   {

     strlist_t each,sl;

     /* This maintains the current utf8-ness */

     for (each = groups->values; each; each=each->next)

       {

         sl = add_to_strlist (into, each->d);

         sl->flags = flags;

         count++;

       }

     break;

   }

    }

  return count;

}

/* For simplicity, and to avoid potential loops, we only expand once -

 * you can't make an alias that points to an alias.  If PREPEND_INPUT

 * is true each item from INPUT is prepended to the new list; if it is

 * false the original item from INPUT is only added if no group

 * existed for it. */

strlist_t

expand_group (strlist_t input, int prepend_input)

{

  strlist_t output = NULL;

  strlist_t sl, rover;

  for (rover = input; rover; rover = rover->next)

    {

      if ((rover->flags & PK_LIST_FROM_FILE))

        continue;

      if (!expand_id (rover->d, &output, rover->flags))

        {

          /* Didn't find any groups, so use the existing string unless

           * we will anyway add it due to the prepend flag.  */

          if (!prepend_input)

            {

              sl = add_to_strlist (&output, rover->d);

              sl->flags = rover->flags;

            }

        }

      if (prepend_input)

        {

          sl = add_to_strlist (&output, rover->d);

          sl->flags = rover->flags;

        }

    }

  return output;

}