90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
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/*
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*
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* Copyright (C) 2015, OFFIS e.V.
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* All rights reserved. See COPYRIGHT file for details.
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*
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* This software and supporting documentation were developed by
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*
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* OFFIS e.V.
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* R&D Division Health
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* Escherweg 2
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* D-26121 Oldenburg, Germany
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*
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*
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* Module: ofstd
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*
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* Author: Jan Schlamelcher
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*
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* Purpose: Platform independent definition of basic functions declared
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* in <math.h> resp. <cmath>.
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*
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*/
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#ifndef OFMATH_H
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#define OFMATH_H
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#include "dcmtk/config/osconfig.h"
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#include "dcmtk/ofstd/oftypes.h" /* for OFBool */
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#include "dcmtk/ofstd/oftraits.h" /* for OFenable_if, ... */
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class DCMTK_OFSTD_EXPORT OFMath
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{
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public:
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#ifndef DOXYGEN
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static OFBool (isnan) (float f);
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static OFBool (isnan) (double d);
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template<typename Integer>
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static inline OFTypename OFenable_if<OFis_integral<Integer>::value,OFBool>::type
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(isnan) ( const Integer i ) { return (isnan) ( OFstatic_cast( double, i ) ); }
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static OFBool (isinf) (float f);
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static OFBool (isinf) (double d);
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template<typename Integer>
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static inline OFTypename OFenable_if<OFis_integral<Integer>::value,OFBool>::type
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(isinf) ( const Integer i ) { return (isinf) ( OFstatic_cast( double, i ) ); }
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#else
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/** Determines if the given floating point number is a not-a-number (NaN) value.
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* @param f the floating point value to inspect.
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* @return OFTrue if f is a NaN, OFFalse otherwise.
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*/
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static OFBool isnan( float f );
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/** Determines if the given floating point number is a not-a-number (NaN) value.
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* @param d the floating point value to inspect.
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* @return OFTrue if d is a NaN, OFFalse otherwise.
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*/
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static OFBool isnan( double d );
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/** Casts the argument to double and calls OFMath::isnan(double) on the result.
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* @param i an integer, i.e. <kbd>OFis_integral<Integer>::value</kbd> equals <kbd>OFTrue</kbd>.
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* @return OFMath::isnan(OFstatic_cast(double,i)).
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*/
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template<typename Integer>
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static OFBool isnan( Integer i );
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/** Determines if the given floating point number is a positive or negative infinity.
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* @param f the floating point value to inspect.
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* @return OFTrue if f is infinite, OFFalse otherwise.
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*/
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static OFBool isinf( float f );
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/** Determines if the given floating point number is a positive or negative infinity.
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* @param d the floating point value to inspect.
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* @return OFTrue if d is infinite, OFFalse otherwise.
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*/
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static OFBool isinf( double d );
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/** Casts the argument to double and calls OFMath::isinf(double) on the result.
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* @param i an integer, i.e. <kbd>OFis_integral<Integer>::value</kbd> equals <kbd>OFTrue</kbd>.
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* @return OFMath::isinf(OFstatic_cast(double,i)).
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*/
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template<typename Integer>
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static OFBool isinf( Integer i );
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#endif
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};
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#endif // OFMATH_H
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