/*

 * common.h: 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 <stdio.h>

#include <stdarg.h>

#include <float.h>

#include <pthread.h>

#ifdef PYRIT_DOUBLE

# define Float double

# define Eps DBL_EPSILON

# define Inf DBL_MAX

#else

# define Float float

# define Eps 1e-6

# define Inf FLT_MAX

#endif

/* verbosity level:

0: only errors (E)

1: major status messages (*)

2: minor status, progress (-)

3: debug messages (D)

4: thread debug

default = 2

*/

extern int pyrit_verbosity;

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

{

	static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

	if (pyrit_verbosity >= vlevel)

	{

		if (pyrit_verbosity >= 4)

			pthread_mutex_lock(&mutex);

		va_list ap;

		va_start(ap, format);

		vprintf(format, ap);

		va_end(ap);

		fflush(stdout);

		if (pyrit_verbosity >= 4)

			pthread_mutex_unlock(&mutex);

	}

}

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<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;

	}

}

#endif