/** Message related functions.
 *
 * @author Steffen Vogel <post@steffenvogel.de>
 * @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
 * @license Apache 2.0
 *********************************************************************************/

#pragma once

#include<villas/signal_list.hpp>

namespace villas {

/* Forward declarataions */
struct List;

namespace node {

/* Forward declaration */
struct Message;
struct Sample;

/** Convert msg from network to host byteorder */
void msg_ntoh(struct Message *m);

/** Convert msg from host to network byteorder */
void msg_hton(struct Message *m);

/** Convert msg header from network to host byteorder */
void msg_hdr_hton(struct Message *m);

/** Convert msg header from host to network byteorder */
void msg_hdr_ntoh(struct Message *m);

/** Check the consistency of a message.
 *
 * The functions checks the header fields of a message.
 *
 * @param m A pointer to the message
 * @retval 0 The message header is valid.
 * @retval <0 The message header is invalid.
 */
int msg_verify(const struct Message *m);

/** Copy fields from \p msg into \p smp. */
int msg_to_sample(const struct Message *msg, struct Sample *smp, const SignalList::Ptr sigs, uint8_t *source_index);

/** Copy fields form \p smp into \p msg. */
int msg_from_sample(struct Message *msg, const struct Sample *smp, const SignalList::Ptr sigs, uint8_t source_index);

} // namespace node
} // namespace villas