/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 1999-2002, 2004-2007, 2009-2012, 2014 Free Software
   Foundation, Inc.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 3 of the License, or (at your option) any later version.

   This library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General
   Public License along with this library.  If not, see
   <http://www.gnu.org/licenses/>. */

#include <config.h>
#include <stdlib.h>
#include <mailutils/types.h>
#include <mailutils/message.h>
#include <mailutils/errno.h>
#include <mailutils/sys/message.h>

int
mu_message_get_part (mu_message_t msg, size_t part, mu_message_t *pmsg)
{
  if (msg == NULL || pmsg == NULL)
    return EINVAL;

  /* Overload.  */
  if (msg->_get_part)
    return msg->_get_part (msg, part, pmsg);

  if (msg->mime == NULL)
    {
      int status = mu_mime_create (&msg->mime, msg, 0);
      if (status != 0)
	return status;
    }
  return mu_mime_get_part (msg->mime, part, pmsg);
}

int
mu_message_set_get_part (mu_message_t msg, int (*_get_part)
		      (mu_message_t, size_t, mu_message_t *),
		      void *owner)
{
  if (msg == NULL)
    return EINVAL;
  if (msg->owner != owner)
    return EACCES;
  msg->_get_part = _get_part;
  return 0;
}