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/*
* IS-IS Rout(e)ing protocol - isis_flags.c
* Routines for manipulation of SSN and SRM flags
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public Licenseas 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 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.
*/
#include <zebra.h>
#include "log.h"
#include "linklist.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_flags.h"
void
flags_initialize (struct flags *flags)
{
flags->maxindex = 0;
flags->free_idcs = NULL;
}
long int
flags_get_index (struct flags *flags)
{
struct listnode *node;
long int index;
if (flags->free_idcs == NULL || flags->free_idcs->count == 0)
{
index = flags->maxindex++;
}
else
{
node = listhead (flags->free_idcs);
index = (long int) listgetdata (node);
listnode_delete (flags->free_idcs, (void *) index);
index--;
}
return index;
}
void
flags_free_index (struct flags *flags, long int index)
{
if (index + 1 == flags->maxindex)
{
flags->maxindex--;
return;
}
if (flags->free_idcs == NULL)
{
flags->free_idcs = list_new ();
}
listnode_add (flags->free_idcs, (void *) (index + 1));
return;
}
int
flags_any_set (u_int32_t * flags)
{
u_int32_t zero[ISIS_MAX_CIRCUITS];
memset (zero, 0x00, ISIS_MAX_CIRCUITS * 4);
return bcmp (flags, zero, ISIS_MAX_CIRCUITS * 4);
}
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