libcoap
4.2.1
coap_hashkey.c
Go to the documentation of this file.
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/* coap_hashkey.c -- definition of hash key type and helper functions
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*
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* Copyright (C) 2010,2011 Olaf Bergmann <bergmann@tzi.org>
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*
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* This file is part of the CoAP library libcoap. Please see
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* README for terms of use.
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*/
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#include "
coap_internal.h
"
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void
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coap_hash_impl
(
const
unsigned
char
*s,
unsigned
int
len,
coap_key_t
h) {
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size_t
j;
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while
(len--) {
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j =
sizeof
(
coap_key_t
)-1;
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while
(j) {
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h[j] = ((h[j] << 7) | (h[j-1] >> 1)) + h[j];
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--j;
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}
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h[0] = (h[0] << 7) + h[0] + *s++;
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}
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}
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coap_key_t
unsigned char coap_key_t[4]
Definition:
coap_hashkey.h:22
coap_hash_impl
void coap_hash_impl(const unsigned char *s, unsigned int 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:12
coap_internal.h
Pulls together all the internal only header files.
src
coap_hashkey.c
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