libreoffice/sc/source/core/tool/subtotal.cxx

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#include "subtotal.hxx"
#include "interpre.hxx"

// -----------------------------------------------------------------------

sal_Bool SubTotal::SafePlus(double& fVal1, double fVal2)
{
    sal_Bool bOk = sal_True;
    SAL_MATH_FPEXCEPTIONS_OFF();
    fVal1 += fVal2;
    if (!::rtl::math::isFinite(fVal1))
    {
        bOk = false;
        if (fVal2 > 0.0)
            fVal1 = DBL_MAX;
        else
            fVal1 = -DBL_MAX;
    }
    return bOk;
}


sal_Bool SubTotal::SafeMult(double& fVal1, double fVal2)
{
    sal_Bool bOk = sal_True;
    SAL_MATH_FPEXCEPTIONS_OFF();
    fVal1 *= fVal2;
    if (!::rtl::math::isFinite(fVal1))
    {
        bOk = false;
        fVal1 = DBL_MAX;
    }
    return bOk;
}


sal_Bool SubTotal::SafeDiv(double& fVal1, double fVal2)
{
    sal_Bool bOk = sal_True;
    SAL_MATH_FPEXCEPTIONS_OFF();
    fVal1 /= fVal2;
    if (!::rtl::math::isFinite(fVal1))
    {
        bOk = false;
        fVal1 = DBL_MAX;
    }
    return bOk;
}

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