3e22dfa5eb
Change-Id: I5ff214bf1ec9031e30344bc125bc99916fd11bfb Reviewed-on: https://gerrit.libreoffice.org/28897 Reviewed-by: Eike Rathke <erack@redhat.com> Tested-by: Eike Rathke <erack@redhat.com>
72 lines
2.4 KiB
C++
72 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_SC_INC_MATH_HXX
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#define INCLUDED_SC_INC_MATH_HXX
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#include <formula/errorcodes.hxx>
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namespace sc {
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/** Return fNumerator/fDenominator if fDenominator!=0 else #DIV/0! error coded
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into double.
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*/
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inline double div( const double& fNumerator, const double& fDenominator )
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{
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return (fDenominator != 0.0) ? (fNumerator / fDenominator) :
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CreateDoubleError( FormulaError::DivisionByZero);
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}
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/** Return fNumerator/fDenominator if fDenominator!=0 else +-Infinity if
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fNumerator!=0 or NaN if fNumerator==0.
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This allows to build/run with -fsanitize=float-divide-by-zero and have a
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defined behavior for the otherwise undefined division by zero case ("If the
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second operand of / or % is zero the behavior is undefined."
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([expr.mul]/4)).
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The Calc interpreter gracefully handles Infinity or NaN double values
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encountered as interim or final results, using this function we can ensure
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defined behavior where desired.
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Use where the double coded error creating div() is not wanted.
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*/
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inline double divide( const double& fNumerator, const double& fDenominator )
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{
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if (fDenominator == 0.0)
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{
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double fVal;
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if (rtl::math::isFinite( fNumerator) && fNumerator != 0.0)
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{
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rtl::math::setInf( &fVal, rtl::math::isSignBitSet( fNumerator));
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}
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else
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{
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rtl::math::setNan( &fVal);
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}
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return fVal;
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}
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return fNumerator / fDenominator;
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}
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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