5193e8453c
both dlhist.c and proc-cache.c uses similar hash table code. factor this out into a helper interface.
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/* hash.h
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*
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* Copyright (C) 2011-2012 Henrik Hautakoski <henrik@fiktivkod.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef HASH_H
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#define HASH_H
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#include <stddef.h>
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struct hash_entry {
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unsigned hash;
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};
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struct hash_table {
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struct hash_entry **ptr;
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unsigned size;
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unsigned count;
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};
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#define HASH_TABLE_INIT { NULL, 0, 0 }
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#define hash_entry(t, i) \
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((void*) *((char**) (t)->ptr + (i)))
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/* general hash functions */
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unsigned hash_sdbm(const char *s);
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void hash_init(struct hash_table *table);
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void hash_free(struct hash_table *table);
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void* hash_lookup(const struct hash_table *t, unsigned hash);
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void* hash_insert(struct hash_table *t, unsigned hash, void *ptr);
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void* hash_remove(struct hash_table *t, unsigned hash);
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#endif /* HASH_H */
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