/*************************************************************************

 *

 * $Id: trionan.h,v 1.9 2005/03/27 18:52:45 breese Exp $

 *

 * Copyright (C) 2001 Bjorn Reese <breese@users.sourceforge.net>

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED

 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF

 * MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND

 * CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.

 *

 ************************************************************************/

#ifndef TRIO_TRIONAN_H

#define TRIO_TRIONAN_H

#include "triodef.h"

#ifdef __cplusplus

extern "C"

{

#endif

#if !defined(TRIO_PUBLIC_NAN)

#if !defined(TRIO_PUBLIC)

#define TRIO_PUBLIC

#endif

#define TRIO_PUBLIC_NAN TRIO_PUBLIC

#endif

	enum

	{

		TRIO_FP_INFINITE,

		TRIO_FP_NAN,

		TRIO_FP_NORMAL,

		TRIO_FP_SUBNORMAL,

		TRIO_FP_ZERO

	};

	/*************************************************************************

	 * Dependencies

	 */

#if defined(TRIO_EMBED_NAN)

	/*

	 * The application that trionan is embedded in must define which functions

	 * it uses.

	 *

	 * The following resolves internal dependencies.

	 */

#if defined(TRIO_FUNC_ISNAN) || defined(TRIO_FUNC_ISINF)

#if !defined(TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT)

#define TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT

#endif

#endif

#if defined(TRIO_FUNC_NAN)

#if !defined(TRIO_FUNC_PINF)

#define TRIO_FUNC_PINF

#endif

#endif

#if defined(TRIO_FUNC_NINF)

#if !defined(TRIO_FUNC_PINF)

#define TRIO_FUNC_PINF

#endif

#endif

#else

/*

 * When trionan is not embedded all all functions are defined.

 */

#define TRIO_FUNC_NAN

#define TRIO_FUNC_PINF

#define TRIO_FUNC_NINF

#define TRIO_FUNC_NZERO

#define TRIO_FUNC_ISNAN

#define TRIO_FUNC_ISINF

#define TRIO_FUNC_ISFINITE

#define TRIO_FUNC_SIGNBIT

#define TRIO_FUNC_FPCLASSIFY

#define TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT

#endif

/*************************************************************************

 * Functions

 */

/*

 * Return NaN (Not-a-Number).

 */

#if defined(TRIO_FUNC_NAN)

	TRIO_PUBLIC_NAN double trio_nan TRIO_PROTO((void));

#endif

/*

 * Return positive infinity.

 */

#if defined(TRIO_FUNC_PINF)

	TRIO_PUBLIC_NAN double trio_pinf TRIO_PROTO((void));

#endif

/*

 * Return negative infinity.

 */

#if defined(TRIO_FUNC_NINF)

	TRIO_PUBLIC_NAN double trio_ninf TRIO_PROTO((void));

#endif

/*

 * Return negative zero.

 */

#if defined(TRIO_FUNC_NZERO)

	TRIO_PUBLIC_NAN double trio_nzero TRIO_PROTO((TRIO_NOARGS));

#endif

/*

 * If number is a NaN return non-zero, otherwise return zero.

 */

#if defined(TRIO_FUNC_ISNAN)

	TRIO_PUBLIC_NAN int trio_isnan TRIO_PROTO((double number));

#endif

/*

 * If number is positive infinity return 1, if number is negative

 * infinity return -1, otherwise return 0.

 */

#if defined(TRIO_FUNC_ISINF)

	TRIO_PUBLIC_NAN int trio_isinf TRIO_PROTO((double number));

#endif

/*

 * If number is finite return non-zero, otherwise return zero.

 */

#if defined(TRIO_FUNC_ISFINITE)

	TRIO_PUBLIC_NAN int trio_isfinite TRIO_PROTO((double number));

#endif

#if defined(TRIO_FUNC_SIGNBIT)

	TRIO_PUBLIC_NAN int trio_signbit TRIO_PROTO((double number));

#endif

#if defined(TRIO_FUNC_FPCLASSIFY)

	TRIO_PUBLIC_NAN int trio_fpclassify TRIO_PROTO((double number));

#endif

#if defined(TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT)

	TRIO_PUBLIC_NAN int trio_fpclassify_and_signbit TRIO_PROTO((double number, int* is_negative));

#endif

#ifdef __cplusplus

}

#endif

#endif /* TRIO_TRIONAN_H */