/*

  File: acl_init.c

  Copyright (C) 1999, 2000

  Andreas Gruenbacher, <a.gruenbacher@bestbits.at>

  This program 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 2.1 of the License, 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

  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, write to the Free Software

  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

*/

#include "config.h"

#include "libacl.h"

acl_obj *

__acl_init_obj(int count)

{

	acl_obj *acl_obj_p = new_obj_p(acl);

	if (!acl_obj_p)

		return NULL;

	acl_obj_p->aused = 0;

	acl_obj_p->aprev = acl_obj_p->anext = (acl_entry_obj *)acl_obj_p;

	acl_obj_p->acurr = (acl_entry_obj *)acl_obj_p;

	/* aprealloc points to an array of pre-allocated ACL entries.

	   Entries between [aprealloc, aprealloc_end) are still available.

	   Pre-allocated entries are consumed from the last entry to the

	   first and aprealloc_end decremented. After all pre-allocated

	   entries are consumed, further entries are malloc'ed.

	   aprealloc == aprealloc_end is true when no more pre-allocated	

	   entries are available. */

	if (count > 0)

		acl_obj_p->aprealloc = (acl_entry_obj *)

			malloc(count * sizeof(acl_entry_obj));

	else

		acl_obj_p->aprealloc = NULL;

	if (acl_obj_p->aprealloc != NULL)

		acl_obj_p->aprealloc_end = acl_obj_p->aprealloc + count;

	else

		acl_obj_p->aprealloc_end = NULL;

	return acl_obj_p;

}

/* 23.4.20 */

acl_t

acl_init(int count)

{

	acl_obj *obj;

	if (count < 0) {

		errno = EINVAL;

		return NULL;

	}

	obj = __acl_init_obj(count);

	return int2ext(obj);

}