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