/**

 * @file  common.h

 * @brief Common functions and definitions

 *

 * This file is part of Pyrit Ray Tracer.

 *

 * Copyright 2006, 2007, 2008  Radek Brich

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#ifndef COMMON_H

#define COMMON_H

#include "config.h"

#include <stdio.h>

#include <math.h>

#include <float.h>

#include <pthread.h>

#include <string>

using namespace std;

#ifdef PYRIT_DOUBLE

# define Float double

# define Eps DBL_EPSILON

# define Inf DBL_MAX

# define PI M_PI

#else

# define Float float

# define Eps 2e-6f

# define Inf FLT_MAX

# define PI (float)M_PI

#endif

// enable M_* constants in MSVC

#define _USE_MATH_DEFINES

#ifdef MSVC

#define NORETURN __declspec(noreturn)

#else

#define NORETURN __attribute__((noreturn))

#endif

/**

 * verbosity level

 *

 * - 0: only errors and warnings (E, W)

 * - 1: major status messages (*)

 * - 2: minor status, progress (-)

 * - 3: debug messages (D)

 * - 4: thread debug

 *

 * default is 2

 */

extern int pyrit_verbosity;

/**

 * print status or debugging message

 * @param[in] vlevel    verbosity level of the message

 * @see pyrit_verbosity

 */

void dbgmsg(const int vlevel, const char *format, ...);

/** template for minimum of three numbers */

template<typename Type> const Type &min3(const Type &a, const Type &b, const Type &c)

{

	if (a <= b)

	{

		if (a <= c)

			return a;

		else

			return c;

	}

	else

	{

		if (b <= c)

			return b;

		else

			return c;

	}

}

/** template for maximum of three numbers */

template<typename Type> const Type &max3(const Type &a, const Type &b, const Type &c)

{

	if (a >= b)

	{

		if (a >= c)

			return a;

		else

			return c;

	}

	else

	{

		if (b >= c)

			return b;

		else

			return c;

	}

}

/** trim whitespace from beginning and end of string */

inline void trim(string& s)

{

	const char *ws = " \n";

	string::size_type pos = s.find_last_not_of(ws);

	if (pos != string::npos)

	{

		s.erase(pos + 1);

		pos = s.find_first_not_of(ws);

		if (pos != string::npos)

			s.erase(0, pos);

	}

	else

		s.erase(s.begin(), s.end());

}

#endif