pnx/dlight
Archived
1
0
Fork 0
Code Activity

hash.c: refactor out common hash table code

Browse source 
both dlhist.c and proc-cache.c uses similar hash table code.
factor this out into a helper interface.
This commit is contained in:
Henrik Hautakoski 2012-04-11 21:09:28 +02:00
parent c1198121bb
commit 5193e8453c
2 changed files with 191 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

53
hash.h Normal file
View file

@ -0,0 +1,53 @@
/* hash.h
*
* Copyright (C) 2011-2012 Henrik Hautakoski <henrik@fiktivkod.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#ifndef HASH_H
#define HASH_H
#include <stddef.h>
struct hash_entry {
unsigned hash;
};
struct hash_table {
struct hash_entry **ptr;
unsigned size;
unsigned count;
};
#define HASH_TABLE_INIT { NULL, 0, 0 }
#define hash_entry(t, i) \
((void*) *((char**) (t)->ptr + (i)))
/* general hash functions */
unsigned hash_sdbm(const char *s);
void hash_init(struct hash_table *table);
void hash_free(struct hash_table *table);
void* hash_lookup(const struct hash_table *t, unsigned hash);
void* hash_insert(struct hash_table *t, unsigned hash, void *ptr);
void* hash_remove(struct hash_table *t, unsigned hash);
#endif /* HASH_H */