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/* Copyright (c) 2011 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef VLAN_BITMAP_H
#define VLAN_BITMAP_H 1
#include <stdbool.h>
#include <stdint.h>
#include "bitmap.h"
/* A "VLAN bitmap" is a 4096-bit bitmap that represents a set. A 1-bit
* indicates that the respective VLAN is a member of the set, a 0-bit indicates
* that it is not. There is one wrinkle: NULL is a valid value that indicates
* either that all VLANs are or are not members, depending on the vlan_bitmap.
*
* This is empirically a useful data structure. */
unsigned long *vlan_bitmap_from_array(const int64_t *vlans, size_t n_vlans);
int vlan_bitmap_from_array__(const int64_t *vlans, size_t n_vlans,
unsigned long int *b);
bool vlan_bitmap_equal(const unsigned long *a, const unsigned long *b);
/* Returns a new copy of 'vlans'. */
static inline unsigned long *
vlan_bitmap_clone(const unsigned long *vlans)
{
return vlans ? bitmap_clone(vlans, 4096) : NULL;
}
#endif /* lib/vlan-bitmap.h */
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