ATable.cpp

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// ------------------------------------------------------------------------
// $RCSfile: ATable.cpp,v $
// ------------------------------------------------------------------------
// $Revision: 1.3 $
// ------------------------------------------------------------------------
// Copyright: see Copyright.readme
// ------------------------------------------------------------------------
//
// Class: ATable
//   Expression class. Generates a list of values from a TABLE() function.
//
// ------------------------------------------------------------------------
//
// $Date: 2002/01/22 15:16:02 $
// $Author: jsberg $
//
// ------------------------------------------------------------------------
 
#include "Expressions/ATable.h"
 
#include <iostream>
 
// Class ATable
// ------------------------------------------------------------------------
 
namespace Expressions {
 
    ATable::ATable(const ATable& rhs)
        : OArray<double>(rhs),
          itsExpr(rhs.itsExpr),
          itsBegin(rhs.itsBegin),
          itsEnd(rhs.itsEnd),
          itsStep(rhs.itsEnd) {}
 
    ATable::ATable(int n1, int n2, int n3)
        : OArray<double>(), itsExpr(), itsBegin(n1), itsEnd(n2), itsStep(n3) {}
 
    ATable::~ATable() {}
 
    OArray<double>* ATable::clone() const { return new ATable(*this); }
 
    void ATable::defineExpression(PtrToScalar<double> expr) { itsExpr = expr; }
 
    std::vector<double> ATable::evaluate() const {
        std::vector<double> result(itsEnd, 0.0);
 
        for (itsHash = itsBegin; itsHash <= itsEnd; itsHash += itsStep) {
            result[itsHash - 1] = itsExpr->evaluate();
        }
 
        return result;
    }
 
    double ATable::getHash() const { return itsHash; }
 
    void ATable::print(std::ostream& os, int) const {
        os << "TABLE(" << itsBegin << ':' << itsEnd << ':' << itsStep << ',';
        itsExpr->print(os);
        os << ')';
        return;
    }
 
}  // namespace Expressions