haiku/headers/private/kernel/khash.h

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/*
** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
** Distributed under the terms of the NewOS License.
*/
#ifndef _KERNEL_KHASH_H
#define _KERNEL_KHASH_H
#include <pools.h>
typedef struct hash_entry hash_entry;
typedef struct new_hash_table new_hash_table;
typedef struct hash_index hash_index;
struct hash_entry {
hash_entry *next;
int hash;
const void *key;
ssize_t klen;
const void *val;
};
struct hash_index {
new_hash_table *nh;
hash_entry *this_idx;
hash_entry *next;
int index;
};
struct new_hash_table {
hash_entry **array;
hash_index iterator;
int count;
int max;
struct pool_ctl *pool;
};
new_hash_table *hash_make(void);
void *hash_get(new_hash_table *, const void *, ssize_t);
void hash_set(new_hash_table *, const void *, ssize_t , const void *);
struct hash_iterator {
void *ptr;
int bucket;
};
void *hash_init(unsigned int table_size, int next_ptr_offset,
int compare_func(void *a, const void *key),
unsigned int hash_func(void *a, const void *key, unsigned int range));
int hash_uninit(void *_hash_table);
int hash_insert(void *_hash_table, void *_elem);
int hash_remove(void *_hash_table, void *_elem);
void *hash_find(void *_hash_table, void *e);
void *hash_lookup(void *_hash_table, const void *key);
struct hash_iterator *hash_open(void *_hash_table, struct hash_iterator *i);
void hash_close(void *_hash_table, struct hash_iterator *i, bool free_iterator);
void *hash_next(void *_hash_table, struct hash_iterator *i);
void hash_rewind(void *_hash_table, struct hash_iterator *i);
/* function ptrs must look like this:
// hash function should calculate hash on either e or key,
// depending on which one is not NULL
unsigned int hash_func(void *e, const void *key, unsigned int range);
// compare function should compare the element with
// the key, returning 0 if equal, other if not
// NOTE: compare func can be null, in which case the hash
// code will compare the key pointer with the target
int compare_func(void *e, const void *key);
*/
unsigned int hash_hash_str( const char *str );
#endif