/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: FNumericFunctions.cxx,v $
 *
 *  $Revision: 1.6 $
 *
 *  last change: $Author: hr $ $Date: 2006-06-20 01:25:40 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Sun Microsystems, Inc.
 *    901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    This library is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *    Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *    MA  02111-1307  USA
 *
 ************************************************************************/

#include <cmath>
#include "file/FNumericFunctions.hxx"
#include <rtl/math.hxx>

using namespace connectivity;
using namespace connectivity::file;
//------------------------------------------------------------------
ORowSetValue OOp_Abs::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    double nVal(lhs);
    if ( nVal < 0 )
        nVal *= -1.0;
    return fabs(nVal);
}
//------------------------------------------------------------------
ORowSetValue OOp_Sign::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    sal_Int32 nRet = 0;
    double nVal(lhs);
    if ( nVal < 0 )
        nRet = -1;
    else if ( nVal > 0 )
        nRet = 1;

    return nRet;
}
//------------------------------------------------------------------
ORowSetValue OOp_Mod::operate(const ORowSetValue& lhs,const ORowSetValue& rhs) const
{
    if ( lhs.isNull() || rhs.isNull() )
        return ORowSetValue();

    return fmod((double)lhs,(double)rhs);
}
//------------------------------------------------------------------
ORowSetValue OOp_Floor::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    return floor((double)lhs);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Ceiling::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    double nVal(lhs);
    return ceil(nVal);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Round::operate(const ::std::vector<ORowSetValue>& lhs) const
{
    if ( lhs.empty() || lhs.size() > 2 )
        return ORowSetValue();

    size_t nSize = lhs.size();
    double nVal = lhs[nSize-1];

    sal_Int32 nDec = 0;
    if ( nSize == 2 && !lhs[0].isNull() )
        nDec = lhs[0];
    return ::rtl::math::round(nVal,nDec);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Exp::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    double nVal(lhs);
    return exp(nVal);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Ln::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() || static_cast<double>(lhs) < 0.0 )
        return lhs;

    double nVal(lhs);
    nVal = log(nVal);
    if ( rtl::math::isNan(nVal) )
        return ORowSetValue();
    return nVal;
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Log::operate(const ::std::vector<ORowSetValue>& lhs) const
{
    if ( lhs.empty() || lhs.size() > 2 )
        return ORowSetValue();
    size_t nSize = lhs.size();
    double nVal = log( (double)lhs[nSize-1] );


    if ( nSize == 2 && !lhs[0].isNull() )
        nVal /= log((double)lhs[0]);

    if ( rtl::math::isNan(nVal) )
        return ORowSetValue();
    return nVal;
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Log10::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() || static_cast<double>(lhs) < 0.0 )
        return lhs;

    double nVal = log((double)lhs);
    if ( rtl::math::isNan(nVal) )
        return ORowSetValue();
    nVal /= log(10.0);
    return nVal;
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Pow::operate(const ORowSetValue& lhs,const ORowSetValue& rhs) const
{
    if ( lhs.isNull() || rhs.isNull() )
        return lhs;

    return pow((double)lhs,(double)rhs);
}
//------------------------------------------------------------------
ORowSetValue OOp_Sqrt::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    double nVal = sqrt((double)lhs);
    if ( rtl::math::isNan(nVal) )
        return ORowSetValue();
    return nVal;
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Pi::operate(const ::std::vector<ORowSetValue>& /*lhs*/) const
{
    return 3.141592653589793116;
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Cos::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    return cos((double)lhs);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Sin::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    return sin((double)lhs);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Tan::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    return tan((double)lhs);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_ACos::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    return acos((double)lhs);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_ASin::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    return asin((double)lhs);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_ATan::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    return atan((double)lhs);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_ATan2::operate(const ORowSetValue& lhs,const ORowSetValue& rhs) const
{
    if ( lhs.isNull() || rhs.isNull() )
        return lhs;

    return atan2((double)lhs,(double)rhs);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Degrees::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    double nLhs = lhs;
    return nLhs*180*(1.0/3.141592653589793116);
}
// -----------------------------------------------------------------------------
ORowSetValue OOp_Radians::operate(const ORowSetValue& lhs) const
{
    if ( lhs.isNull() )
        return lhs;

    double nLhs = lhs;
    return nLhs*3.141592653589793116*(1.0/180.0);
}
// -----------------------------------------------------------------------------