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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; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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(uint32_t *flags)
{
uint32_t zero[ISIS_MAX_CIRCUITS];
memset(zero, 0x00, ISIS_MAX_CIRCUITS * 4);
return bcmp(flags, zero, ISIS_MAX_CIRCUITS * 4);
}
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