sdnv.h

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/**
 * \addtogroup agent
 * @{
 */

/**
 * \defgroup sdnv SDNV Functions
 *
 * @{
 */

/**
 * \file 
 * \brief Headerfile for sdnv functions
 * \author Georg von Zengen <vonzeng@ibr.cs.tu-bs.de>
 */

#ifndef __SDNV_H__
#define __SDNV_H__

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

#include "contiki.h"

typedef uint8_t * sdnv_t;

/**
 * \brief encodes an uint32 value in sdnv
 * \param val value to be encoded
 * \param bp pointer to sdnv
 * \param len size of sdnv
 * \return length of sndv
 */
int sdnv_encode(uint32_t val, uint8_t * bp, size_t len);

/** 
 * \brief calculates the length needed to encode an uint32 value in sdnv
 * \param val value to be encoded
 * \return length of sndv
 */
size_t sdnv_encoding_len(uint32_t val);

/**
 * \brief decodes a sdnv to an uint32 value
 * \param bp pointer to sdnv
 * \param len length of sdnv
 * \param val pointer to uint32 value
 * \return length of sndv
 */
int sdnv_decode(const uint8_t * bp, size_t len, uint32_t * val);

/**
 * \brief calculates the length of a sdnv
 * \param bp pointer to sdnv
 * \return length of sndv
 */
size_t sdnv_len(const uint8_t * bp);

#define sdnv_decode2(a,b) sdnv_decode(a,sdnv_len(a),b)

#endif
/** @} */
/** @} */