encode.h
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/*
* encode.h -- encoding and decoding of CoAP data types
*
* Copyright (C) 2010-2012 Olaf Bergmann <bergmann@tzi.org>
*
* This file is part of the CoAP library libcoap. Please see README for terms
* of use.
*/
#ifndef COAP_ENCODE_H_
#define COAP_ENCODE_H_
#if (BSD >= 199103) || defined(WITH_CONTIKI) || defined(_WIN32)
# include <string.h>
#else
# include <strings.h>
#endif
#include <stdint.h>
#define Nn 8 /* duplicate definition of N if built on sky motes */
#define ENCODE_HEADER_SIZE 4
#define HIBIT (1 << (Nn - 1))
#define EMASK ((1 << ENCODE_HEADER_SIZE) - 1)
#define MMASK ((1 << Nn) - 1 - EMASK)
#define MAX_VALUE ( (1 << Nn) - (1 << ENCODE_HEADER_SIZE) ) * (1 << ((1 << ENCODE_HEADER_SIZE) - 1))
#define COAP_PSEUDOFP_DECODE_8_4(r) (r < HIBIT ? r : (r & MMASK) << (r & EMASK))
#ifndef HAVE_FLS
/* include this only if fls() is not available */
extern int coap_fls(unsigned int i);
#else
#define coap_fls(i) fls(i)
#endif
#ifndef HAVE_FLSLL
/* include this only if flsll() is not available */
extern int coap_flsll(long long i);
#else
#define coap_flsll(i) flsll(i)
#endif
/* ls and s must be integer variables */
#define COAP_PSEUDOFP_ENCODE_8_4_DOWN(v,ls) (v < HIBIT ? v : (ls = coap_fls(v) - Nn, (v >> ls) & MMASK) + ls)
#define COAP_PSEUDOFP_ENCODE_8_4_UP(v,ls,s) (v < HIBIT ? v : (ls = coap_fls(v) - Nn, (s = (((v + ((1<<ENCODE_HEADER_SIZE<<ls)-1)) >> ls) & MMASK)), s == 0 ? HIBIT + ls + 1 : s + ls))
unsigned int coap_decode_var_bytes(const uint8_t *buf, unsigned int length);
uint64_t coap_decode_var_bytes8(const uint8_t *buf, unsigned int length);
unsigned int coap_encode_var_safe(uint8_t *buf,
size_t length,
unsigned int value);
unsigned int coap_encode_var_safe8(uint8_t *buf,
size_t length,
uint64_t value);
COAP_STATIC_INLINE COAP_DEPRECATED int
coap_encode_var_bytes(uint8_t *buf, unsigned int value
) {
return (int)coap_encode_var_safe(buf, sizeof(value), value);
}
#endif /* COAP_ENCODE_H_ */
coap_encode_var_safe
unsigned int coap_encode_var_safe(uint8_t *buf, size_t length, unsigned int value)
Encodes multiple-length byte sequences.
Definition: encode.c:38
coap_flsll
int coap_flsll(long long i)
Definition: encode.c:19
coap_fls
int coap_fls(unsigned int i)
Definition: encode.c:13
coap_encode_var_bytes
COAP_STATIC_INLINE COAP_DEPRECATED int coap_encode_var_bytes(uint8_t *buf, unsigned int value)
Definition: encode.h:118
coap_decode_var_bytes
unsigned int coap_decode_var_bytes(const uint8_t *buf, unsigned int length)
Decodes multiple-length byte sequences.
Definition: encode.c:29
coap_decode_var_bytes8
uint64_t coap_decode_var_bytes8(const uint8_t *buf, unsigned int length)
Decodes multiple-length byte sequences.
Definition: encode.c:58
coap_encode_var_safe8
unsigned int coap_encode_var_safe8(uint8_t *buf, size_t length, uint64_t value)
Encodes multiple-length byte sequences.
Definition: encode.c:68
COAP_DEPRECATED
#define COAP_DEPRECATED
Definition: libcoap.h:46
COAP_STATIC_INLINE
#define COAP_STATIC_INLINE
Definition: libcoap.h:38
uint8_t
unsigned char uint8_t
Definition: uthash.h:79