/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

 Copyright (C) 2008 Andreas Gaida

 Copyright (C) 2008 Ralph Schreyer

 Copyright (C) 2008 Klaus Spanderen

 This file is part of QuantLib, a free-software/open-source library

 for financial quantitative analysts and developers - http://quantlib.org/

 QuantLib is free software: you can redistribute it and/or modify it

 under the terms of the QuantLib license.  You should have received a

 copy of the license along with this program; if not, please email

 <quantlib-dev@lists.sf.net>. The license is also available online at

 <https://www.quantlib.org/license.shtml>.

 This program 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 license for more details.

*/

/*! \file uniform1dmesher.hpp

    \brief One-dimensional simple uniform grid mesher

*/

#ifndef quantlib_fdm_uniform_1d_mesher_hpp

#define quantlib_fdm_uniform_1d_mesher_hpp

#include <ql/methods/finitedifferences/meshers/fdm1dmesher.hpp>

#include <ql/errors.hpp>

#include <ql/utilities/null.hpp>

namespace QuantLib {

    class Uniform1dMesher : public Fdm1dMesher {

      public:

        Uniform1dMesher(Real start, Real end, Size size)

        : Fdm1dMesher(size) {

            QL_REQUIRE(end > start, "end must be larger than start");

            const Real dx = (end-start)/(size-1);

            for (Size i=0; i < size-1; ++i) {

                locations_[i] = start + i*dx;

                dplus_[i] = dminus_[i+1] = dx;

            }

            locations_.back() = end;

            dplus_.back() = dminus_.front() = Null<Real>();

        }

    };

}

#endif