Branch data     Line data    Source code

       1                 :            : /* Copyright (c) 2011 Nicira, Inc.
       2                 :            :  *
       3                 :            :  * Licensed under the Apache License, Version 2.0 (the "License");
       4                 :            :  * you may not use this file except in compliance with the License.
       5                 :            :  * You may obtain a copy of the License at:
       6                 :            :  *
       7                 :            :  *     http://www.apache.org/licenses/LICENSE-2.0
       8                 :            :  *
       9                 :            :  * Unless required by applicable law or agreed to in writing, software
      10                 :            :  * distributed under the License is distributed on an "AS IS" BASIS,
      11                 :            :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12                 :            :  * See the License for the specific language governing permissions and
      13                 :            :  * limitations under the License.
      14                 :            :  */
      15                 :            : 
      16                 :            : #ifndef VLAN_BITMAP_H
      17                 :            : #define VLAN_BITMAP_H 1
      18                 :            : 
      19                 :            : #include <stdbool.h>
      20                 :            : #include <stdint.h>
      21                 :            : #include "bitmap.h"
      22                 :            : 
      23                 :            : /* A "VLAN bitmap" is a 4096-bit bitmap that represents a set.  A 1-bit
      24                 :            :  * indicates that the respective VLAN is a member of the set, a 0-bit indicates
      25                 :            :  * that it is not.  There is one wrinkle: NULL is a valid value that indicates
      26                 :            :  * either that all VLANs are or are not members, depending on the vlan_bitmap.
      27                 :            :  *
      28                 :            :  * This is empirically a useful data structure. */
      29                 :            : 
      30                 :            : unsigned long *vlan_bitmap_from_array(const int64_t *vlans, size_t n_vlans);
      31                 :            : int vlan_bitmap_from_array__(const int64_t *vlans, size_t n_vlans,
      32                 :            :                              unsigned long int *b);
      33                 :            : 
      34                 :            : bool vlan_bitmap_equal(const unsigned long *a, const unsigned long *b);
      35                 :            : 
      36                 :            : /* Returns a new copy of 'vlans'. */
      37                 :            : static inline unsigned long *
      38                 :         25 : vlan_bitmap_clone(const unsigned long *vlans)
      39                 :            : {
      40         [ +  + ]:         25 :     return vlans ? bitmap_clone(vlans, 4096) : NULL;
      41                 :            : }
      42                 :            : 
      43                 :            : #endif /* lib/vlan-bitmap.h */