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99 lines
2.9 KiB
99 lines
2.9 KiB
/*
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* Copyright © 2009 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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*
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*/
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#ifndef RAVI_SET_H
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#define RAVI_SET_H
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#include <inttypes.h>
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#include <stdbool.h>
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struct set_entry {
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uint32_t hash;
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const void *key;
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};
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struct set {
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struct set_entry *table;
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uint32_t (*hash_function)(const void *key);
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int (*key_equals_function)(const void *a, const void *b);
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uint32_t size;
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uint32_t rehash;
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uint32_t max_entries;
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uint32_t size_index;
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uint32_t entries;
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uint32_t deleted_entries;
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};
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struct set *
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set_create(uint32_t (*hash_function)(const void *key),
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int (*key_equals_function)(const void *a,
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const void *b));
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void
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set_destroy(struct set *set,
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void (*delete_function)(struct set_entry *entry));
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struct set_entry *
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set_add(struct set *set, const void *key);
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bool
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set_contains(struct set *set, const void *key);
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void
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set_remove(struct set *set, const void *key);
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struct set_entry *
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set_search(struct set *set, const void *key);
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void
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set_remove_entry(struct set *set, struct set_entry *entry);
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struct set_entry *
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set_next_entry(struct set *set, struct set_entry *entry);
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struct set_entry *
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set_random_entry(struct set *set,
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int (*predicate)(struct set_entry *entry));
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/**
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* This foreach function is safe against deletion (which just replaces
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* an entry's data with the deleted marker), but not against insertion
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* (which may rehash the table, making entry a dangling pointer).
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*/
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#define set_foreach(ht, entry) \
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for (entry = set_next_entry(ht, NULL); \
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entry != NULL; \
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entry = set_next_entry(ht, entry))
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/* Alternate interfaces to reduce repeated calls to hash function. */
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struct set_entry *
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set_search_pre_hashed(struct set *set, uint32_t hash, const void *key);
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struct set_entry *
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set_add_pre_hashed(struct set *set, uint32_t hash, const void *key);
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#endif
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