encode.c
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/* encode.c -- encoding and decoding of CoAP data types
*
* Copyright (C) 2010,2011 Olaf Bergmann <bergmann@tzi.org>
*
* This file is part of the CoAP library libcoap. Please see
* README for terms of use.
*/
#ifndef NDEBUG
# include <stdio.h>
#endif
#include "coap_config.h"
#include "encode.h"
/* Carsten suggested this when fls() is not available: */
int coap_fls(unsigned int i) {
int n;
for (n = 0; i; n++)
i >>= 1;
return n;
}
unsigned int
coap_decode_var_bytes(unsigned char *buf,unsigned int len) {
unsigned int i, n = 0;
for (i = 0; i < len; ++i)
n = (n << 8) + buf[i];
return n;
}
unsigned int
coap_encode_var_bytes(unsigned char *buf, unsigned int val) {
unsigned int n, i;
for (n = 0, i = val; i && n < sizeof(val); ++n)
i >>= 8;
i = n;
while (i--) {
buf[i] = val & 0xff;
val >>= 8;
}
return n;
}
encode.h
coap_fls
int coap_fls(unsigned int i)
Definition: encode.c:17
coap_encode_var_bytes
unsigned int coap_encode_var_bytes(unsigned char *buf, unsigned int val)
Encodes multiple-length byte sequences.
Definition: encode.c:34
coap_decode_var_bytes
unsigned int coap_decode_var_bytes(unsigned char *buf, unsigned int len)
Decodes multiple-length byte sequences.
Definition: encode.c:25