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https://github.com/openvswitch/ovs
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e0edde6fee
Replaced all instances of Nicira Networks(, Inc) to Nicira, Inc. Feature #10593 Signed-off-by: Raju Subramanian <rsubramanian@nicira.com> Signed-off-by: Ben Pfaff <blp@nicira.com>
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* Copyright (c) 2011 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "vlan-bitmap.h"
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/* Allocates and returns a new 4096-bit bitmap that has 1-bit in positions in
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* the 'n_vlans' bits indicated in 'vlans' and 0-bits everywhere else. Returns
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* a null pointer if there are no (valid) VLANs in 'vlans'. */
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unsigned long *
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vlan_bitmap_from_array(const int64_t *vlans, size_t n_vlans)
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{
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unsigned long *b;
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if (!n_vlans) {
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return NULL;
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}
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b = bitmap_allocate(4096);
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if (!vlan_bitmap_from_array__(vlans, n_vlans, b)) {
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free(b);
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return NULL;
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}
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return b;
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}
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/* Adds to 4096-bit VLAN bitmap 'b' a 1-bit in each position in the 'n_vlans'
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* bits indicated in 'vlans'. Returns the number of 1-bits added to 'b'. */
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int
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vlan_bitmap_from_array__(const int64_t *vlans, size_t n_vlans,
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unsigned long int *b)
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{
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size_t i;
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int n;
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n = 0;
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for (i = 0; i < n_vlans; i++) {
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int64_t vlan = vlans[i];
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if (vlan >= 0 && vlan < 4096 && !bitmap_is_set(b, vlan)) {
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bitmap_set1(b, vlan);
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n++;
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}
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}
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return n;
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}
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/* Returns true if 'a' and 'b' are the same: either both null or both the same
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* 4096-bit bitmap.
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*
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* (We assume that a nonnull bitmap is not all 0-bits.) */
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bool
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vlan_bitmap_equal(const unsigned long *a, const unsigned long *b)
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{
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return (!a && !b) || (a && b && bitmap_equal(a, b, 4096));
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}
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