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/*************************************************************************
*
* $Id: trionan.h 2026 2003-08-06 04:43:55Z wbrack $
*
* 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 */
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