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40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
#ifndef EL__UTIL_HASH_H
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#define EL__UTIL_HASH_H
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#include "util/lists.h"
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/** This should be hopefully always 32bit at least. I'm not sure what will
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* happen when this will be of other length, but it should still work ok.
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* --pasky */
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typedef unsigned long hash_value_T;
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typedef hash_value_T (* hash_func_T)(unsigned char *key, unsigned int keylen, hash_value_T magic);
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struct hash_item {
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LIST_HEAD(struct hash_item);
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unsigned char *key;
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unsigned int keylen;
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void *value;
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};
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struct hash {
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unsigned int width; /**< Number of bits - hash array must be 2^width long. */
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hash_func_T func;
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struct list_head hash[1]; /**< Must be at end ! */
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};
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struct hash *init_hash8(void);
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void free_hash(struct hash **hashp);
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struct hash_item *add_hash_item(struct hash *hash, unsigned char *key, unsigned int keylen, void *value);
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struct hash_item *get_hash_item(struct hash *hash, unsigned char *key, unsigned int keylen);
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void del_hash_item(struct hash *hash, struct hash_item *item);
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/** @relates hash */
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#define foreach_hash_item(item, hash_table, iterator) \
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for (iterator = 0; iterator < (1 << (hash_table).width); iterator++) \
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foreach (item, (hash_table).hash[iterator])
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#endif
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