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Sourcecode: acl version File versions

acl_init.c

/*
  File: acl_init.c

  Copyright (C) 1999, 2000
  Andreas Gruenbacher, <a.gruenbacher@computer.org>

  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 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
  Library General Public License for more details.

  You should have received a copy of the GNU Library 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 "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);
}


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