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

 *

 * $Id$

 *

 * 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_NAN_H

#define TRIO_NAN_H

#include "triodef.h"

#ifdef __cplusplus

extern "C" {

#endif

enum {

  TRIO_FP_INFINITE,

  TRIO_FP_NAN,

  TRIO_FP_NORMAL,

  TRIO_FP_SUBNORMAL,

  TRIO_FP_ZERO

};

/*

 * Return NaN (Not-a-Number).

 */

TRIO_PUBLIC double trio_nan TRIO_PROTO((void));

/*

 * Return positive infinity.

 */

TRIO_PUBLIC double trio_pinf TRIO_PROTO((void));

/*

 * Return negative infinity.

 */

TRIO_PUBLIC double trio_ninf TRIO_PROTO((void));

/*

 * Return negative zero.

 */

TRIO_PUBLIC double trio_nzero TRIO_PROTO((TRIO_NOARGS));

/*

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

 */

TRIO_PUBLIC int trio_isnan TRIO_PROTO((double number));

/*

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

 * infinity return -1, otherwise return 0.

 */

TRIO_PUBLIC int trio_isinf TRIO_PROTO((double number));

/*

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

 */

#if 0

	/* Temporary fix - these 2 routines not used in libxml */

TRIO_PUBLIC int trio_isfinite TRIO_PROTO((double number));

TRIO_PUBLIC int trio_fpclassify TRIO_PROTO((double number));

#endif

TRIO_PUBLIC int trio_signbit TRIO_PROTO((double number));

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

#ifdef __cplusplus

}

#endif

#endif /* TRIO_NAN_H */