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85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/*************************************************************************
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*
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* $Id: trionan.h 2026 2003-08-06 04:43:55Z wbrack $
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*
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* Copyright (C) 2001 Bjorn Reese <breese@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND
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* CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.
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*
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************************************************************************/
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#ifndef TRIO_NAN_H
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#define TRIO_NAN_H
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#include "triodef.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum {
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TRIO_FP_INFINITE,
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TRIO_FP_NAN,
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TRIO_FP_NORMAL,
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TRIO_FP_SUBNORMAL,
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TRIO_FP_ZERO
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};
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/*
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* Return NaN (Not-a-Number).
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*/
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TRIO_PUBLIC double trio_nan TRIO_PROTO((void));
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/*
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* Return positive infinity.
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*/
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TRIO_PUBLIC double trio_pinf TRIO_PROTO((void));
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/*
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* Return negative infinity.
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*/
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TRIO_PUBLIC double trio_ninf TRIO_PROTO((void));
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/*
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* Return negative zero.
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*/
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TRIO_PUBLIC double trio_nzero TRIO_PROTO((TRIO_NOARGS));
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/*
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* If number is a NaN return non-zero, otherwise return zero.
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*/
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TRIO_PUBLIC int trio_isnan TRIO_PROTO((double number));
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/*
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* If number is positive infinity return 1, if number is negative
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* infinity return -1, otherwise return 0.
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*/
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TRIO_PUBLIC int trio_isinf TRIO_PROTO((double number));
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/*
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* If number is finite return non-zero, otherwise return zero.
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*/
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#if 0
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/* Temporary fix - these 2 routines not used in libxml */
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TRIO_PUBLIC int trio_isfinite TRIO_PROTO((double number));
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TRIO_PUBLIC int trio_fpclassify TRIO_PROTO((double number));
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#endif
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TRIO_PUBLIC int trio_signbit TRIO_PROTO((double number));
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TRIO_PUBLIC int trio_fpclassify_and_signbit TRIO_PROTO((double number, int *is_negative));
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#ifdef __cplusplus
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}
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#endif
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#endif /* TRIO_NAN_H */
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