184 lines
3.6 KiB
C
184 lines
3.6 KiB
C
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/*************************************************************************
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*
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* $Id: trionan.h,v 1.9 2005/03/27 18:52:45 breese Exp $
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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_TRIONAN_H
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#define TRIO_TRIONAN_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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#if !defined(TRIO_PUBLIC_NAN)
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# if !defined(TRIO_PUBLIC)
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# define TRIO_PUBLIC
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# endif
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# define TRIO_PUBLIC_NAN TRIO_PUBLIC
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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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* Dependencies
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*/
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#if defined(TRIO_EMBED_NAN)
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/*
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* The application that trionan is embedded in must define which functions
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* it uses.
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*
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* The following resolves internal dependencies.
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*/
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# if defined(TRIO_FUNC_ISNAN) \
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|| defined(TRIO_FUNC_ISINF)
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# if !defined(TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT)
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# define TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT
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# endif
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# endif
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# if defined(TRIO_FUNC_NAN)
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# if !defined(TRIO_FUNC_PINF)
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# define TRIO_FUNC_PINF
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# endif
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# endif
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# if defined(TRIO_FUNC_NINF)
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# if !defined(TRIO_FUNC_PINF)
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# define TRIO_FUNC_PINF
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# endif
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# endif
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#else
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/*
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* When trionan is not embedded all all functions are defined.
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*/
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# define TRIO_FUNC_NAN
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# define TRIO_FUNC_PINF
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# define TRIO_FUNC_NINF
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# define TRIO_FUNC_NZERO
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# define TRIO_FUNC_ISNAN
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# define TRIO_FUNC_ISINF
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# define TRIO_FUNC_ISFINITE
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# define TRIO_FUNC_SIGNBIT
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# define TRIO_FUNC_FPCLASSIFY
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# define TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT
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#endif
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/*************************************************************************
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* Functions
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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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#if defined(TRIO_FUNC_NAN)
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TRIO_PUBLIC_NAN double
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trio_nan
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TRIO_PROTO((void));
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#endif
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/*
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* Return positive infinity.
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*/
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#if defined(TRIO_FUNC_PINF)
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TRIO_PUBLIC_NAN double
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trio_pinf
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TRIO_PROTO((void));
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#endif
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/*
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* Return negative infinity.
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*/
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#if defined(TRIO_FUNC_NINF)
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TRIO_PUBLIC_NAN double
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trio_ninf
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TRIO_PROTO((void));
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#endif
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/*
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* Return negative zero.
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*/
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#if defined(TRIO_FUNC_NZERO)
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TRIO_PUBLIC_NAN double
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trio_nzero
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TRIO_PROTO((TRIO_NOARGS));
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#endif
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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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#if defined(TRIO_FUNC_ISNAN)
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TRIO_PUBLIC_NAN int
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trio_isnan
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TRIO_PROTO((double number));
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#endif
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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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#if defined(TRIO_FUNC_ISINF)
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TRIO_PUBLIC_NAN int
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trio_isinf
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TRIO_PROTO((double number));
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#endif
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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 defined(TRIO_FUNC_ISFINITE)
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TRIO_PUBLIC_NAN int
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trio_isfinite
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TRIO_PROTO((double number));
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#endif
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#if defined(TRIO_FUNC_SIGNBIT)
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TRIO_PUBLIC_NAN int
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trio_signbit
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TRIO_PROTO((double number));
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#endif
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#if defined(TRIO_FUNC_FPCLASSIFY)
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TRIO_PUBLIC_NAN int
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trio_fpclassify
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TRIO_PROTO((double number));
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#endif
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#if defined(TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT)
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TRIO_PUBLIC_NAN int
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trio_fpclassify_and_signbit
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TRIO_PROTO((double number, int *is_negative));
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* TRIO_TRIONAN_H */
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