lib/skiplist.h

   1 /* Copyright (C) 2016 Hewlett Packard Enterprise Development LP
   2  * All Rights Reserved.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License"); you may
   5  * not use this file except in compliance with the License. You may obtain
   6  * a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  13  * License for the specific language governing permissions and limitations
  14  * under the License.
  15  */
  16
  17 #ifndef LIB_SKIPLIST_H_
  18 #define LIB_SKIPLIST_H_
  19
  20 #include <stdbool.h>
  21 #include <stdint.h>
  22 #include <stdlib.h>
  23
  24 typedef int (skiplist_comparator)(const void *a, const void *b,
  25                                   const void *conf);
  26
  27 struct skiplist_node;
  28
  29 struct skiplist;
  30
  31 #define SKIPLIST_FOR_EACH (SKIPLIST_NODE, SKIPLIST) \
  32     for (SKIPLIST_NODE = skiplist_first(SKIPLIST); \
  33          SKIPLIST_NODE; \
  34          SKIPLIST_NODE = skiplist_next(SKIPLIST_NODE))
  35
  36 struct skiplist *skiplist_create(skiplist_comparator *object_comparator,
  37                                  void *configuration);
  38 void skiplist_insert(struct skiplist *sl, const void *object);
  39 void *skiplist_delete(struct skiplist *sl, const void *object);
  40 struct skiplist_node *skiplist_find(struct skiplist *sl, const void *value);
  41 void *skiplist_get_data(struct skiplist_node *node);
  42 uint32_t skiplist_get_size(struct skiplist *sl);
  43 struct skiplist_node *skiplist_forward_to(struct skiplist *sl,
  44                                           const void *value);
  45 struct skiplist_node *skiplist_first(struct skiplist *sl);
  46 struct skiplist_node *skiplist_next(struct skiplist_node *node);
  47 void skiplist_destroy(struct skiplist *sl, void (*func)(void *));
  48
  49 #endif /* LIB_SKIPLIST_H_ */