Ondřej Surý
f59fd49fd8
As the names suggest the original isc_hash64 function returns 64-bit long hash values and the isc_hash32() returns 32-bit values.
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/*
|
|
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*
|
|
* See the COPYRIGHT file distributed with this work for additional
|
|
* information regarding copyright ownership.
|
|
*/
|
|
|
|
#ifndef ISC_HASH_H
|
|
#define ISC_HASH_H 1
|
|
|
|
#include <inttypes.h>
|
|
#include <stdbool.h>
|
|
|
|
#include "isc/lang.h"
|
|
#include "isc/types.h"
|
|
|
|
/***
|
|
*** Functions
|
|
***/
|
|
ISC_LANG_BEGINDECLS
|
|
|
|
const void *
|
|
isc_hash_get_initializer(void);
|
|
|
|
void
|
|
isc_hash_set_initializer(const void *initializer);
|
|
|
|
#define isc_hash_function isc_hash64
|
|
|
|
uint32_t
|
|
isc_hash32(const void *data, const size_t length, const bool case_sensitive);
|
|
uint64_t
|
|
isc_hash64(const void *data, const size_t length, const bool case_sensitive);
|
|
/*!<
|
|
* \brief Calculate a hash over data.
|
|
*
|
|
* This hash function is useful for hashtables. The hash function is
|
|
* opaque and not important to the caller. The returned hash values are
|
|
* non-deterministic and will have different mapping every time a
|
|
* process using this library is run, but will have uniform
|
|
* distribution.
|
|
*
|
|
* isc_hash_32/64() calculates the hash from start to end over the
|
|
* input data.
|
|
*
|
|
* 'data' is the data to be hashed.
|
|
*
|
|
* 'length' is the size of the data to be hashed.
|
|
*
|
|
* 'case_sensitive' specifies whether the hash key should be treated as
|
|
* case_sensitive values. It should typically be false if the hash key
|
|
* is a DNS name.
|
|
*
|
|
* Returns:
|
|
* \li 32 or 64-bit hash value
|
|
*/
|
|
|
|
ISC_LANG_ENDDECLS
|
|
|
|
#endif /* ISC_HASH_H */
|