/****************************************************************************
 *
 *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
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 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name PX4 nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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 ****************************************************************************/

/**
 * @file Blockparam.cpp
 *
 * Controller library code
 */

#include <math.h>
#include <stdio.h>
#include <string.h>

#include "BlockParam.hpp"

namespace control
{

BlockParamBase::BlockParamBase(Block *parent, const char *name, bool parent_prefix) :
	_handle(PARAM_INVALID)
{
	char fullname[blockNameLengthMax];

	if (parent == NULL) {
		strncpy(fullname, name, blockNameLengthMax);

	} else {
		char parentName[blockNameLengthMax];
		parent->getName(parentName, blockNameLengthMax);

		if (!strcmp(name, "")) {
			strncpy(fullname, parentName, blockNameLengthMax);

		} else if (parent_prefix) {
			snprintf(fullname, blockNameLengthMax, "%s_%s", parentName, name);
		} else {
			strncpy(fullname, name, blockNameLengthMax);
		}

		parent->getParams().add(this);
	}

	_handle = param_find(fullname);

	if (_handle == PARAM_INVALID)
		printf("error finding param: %s\n", fullname);
};

template <class T>
BlockParam<T>::BlockParam(Block *block, const char *name,
		bool parent_prefix) :
	BlockParamBase(block, name, parent_prefix),
	_val() {
	update();
}

template <class T>
T BlockParam<T>::get() { return _val; }

template <class T>
void BlockParam<T>::set(T val) { _val = val; }

template <class T>
void BlockParam<T>::update() {
	if (_handle != PARAM_INVALID) param_get(_handle, &_val);
}

template <class T>
BlockParam<T>::~BlockParam() {};

template class __EXPORT BlockParam<float>;
template class __EXPORT BlockParam<int>;

} // namespace control