56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/* apk_hash.h - Alpine Package Keeper (APK)
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*
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* Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
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* Copyright (C) 2008 Timo Teräs <timo.teras@iki.fi>
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation. See http://www.gnu.org/ for details.
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*/
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#ifndef APK_HASH_H
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#define APK_HASH_H
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#include <malloc.h>
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#include "apk_defines.h"
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typedef void *apk_hash_item;
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typedef const void *apk_hash_key;
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typedef unsigned long (*apk_hash_f)(apk_hash_key);
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typedef int (*apk_hash_compare_f)(apk_hash_key, apk_hash_key);
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typedef void (*apk_hash_delete_f)(apk_hash_item);
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typedef int (*apk_hash_enumerator_f)(apk_hash_item, void *ctx);
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struct apk_hash_ops {
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ptrdiff_t node_offset;
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apk_hash_key (*get_key)(apk_hash_item item);
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unsigned long (*hash_key)(apk_hash_key key);
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int (*compare)(apk_hash_key key, apk_hash_key item);
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void (*delete_item)(apk_hash_item item);
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};
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typedef struct hlist_node apk_hash_node;
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APK_ARRAY(apk_hash_array, struct hlist_head);
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struct apk_hash {
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const struct apk_hash_ops *ops;
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struct apk_hash_array *buckets;
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int num_items;
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};
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unsigned long apk_hash_string(const char *string);
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unsigned long apk_hash_csum(const void *);
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void apk_hash_init(struct apk_hash *h, const struct apk_hash_ops *ops,
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int num_buckets);
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void apk_hash_free(struct apk_hash *h);
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int apk_hash_foreach(struct apk_hash *h, apk_hash_enumerator_f e, void *ctx);
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apk_hash_item apk_hash_get(struct apk_hash *h, apk_hash_key key);
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void apk_hash_insert(struct apk_hash *h, apk_hash_item item);
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void apk_hash_delete(struct apk_hash *h, apk_hash_key key);
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#endif
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