libcoap 4.3.2rc2

coap_hashkey_internal.h
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1/*
2 * coap_hashkey.h -- definition of hash key type and helper functions
3 *
4 * Copyright (C) 2010-2011 Olaf Bergmann <bergmann@tzi.org>
5 *
6 * SPDX-License-Identifier: BSD-2-Clause
7 *
8 * This file is part of the CoAP library libcoap. Please see README for terms
9 * of use.
10 */
11
17#ifndef COAP_HASHKEY_INTERNAL_H_
18#define COAP_HASHKEY_INTERNAL_H_
19
20#include "libcoap.h"
21#include "coap_uthash_internal.h"
22#include "coap_str.h"
23
24 typedef unsigned char coap_key_t[4];
25
26#ifndef coap_hash
36 void coap_hash_impl(const unsigned char *s, size_t len, coap_key_t h);
37
38#define coap_hash(String,Length,Result) \
39 coap_hash_impl((String),(Length),(Result))
40
41/* This is used to control the pre-set hash-keys for resources. */
42#define COAP_DEFAULT_HASH
43#else
44#undef COAP_DEFAULT_HASH
45#endif /* coap_hash */
46
55#define coap_str_hash(Str,H) { \
56 assert(Str); \
57 memset((H), 0, sizeof(coap_key_t)); \
58 coap_hash((Str)->s, (Str)->length, (H)); \
59 }
60
61#endif /* COAP_HASHKEY_INTERNAL_H_ */
coap_key_t
unsigned char coap_key_t[4]
Definition: coap_hashkey_internal.h:24
coap_hash_impl
void coap_hash_impl(const unsigned char *s, size_t len, coap_key_t h)
Calculates a fast hash over the given string s of length len and stores the result into h.
Definition: coap_hashkey.c:19
coap_str.h
Strings to be used in the CoAP library.
libcoap.h
Platform specific header file for CoAP stack.