Stride.h

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//          Copyright Iowa State University 2009-2010.
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file LICENSE_1_0.txt or copy at
//          http://www.boost.org/LICENSE_1_0.txt)

#pragma once
#ifndef INCLUDED_Stride_h_GUID_eaa50b9c_e526_4656_89dc_99008d82447d
#define INCLUDED_Stride_h_GUID_eaa50b9c_e526_4656_89dc_99008d82447d

// Local includes
// - none

// Library includes
// - none

// Standard includes
// - none

namespace util {


    class Stride {
        public:
            Stride(const unsigned int n) :
                _stride(n),
                _step(0) { }

            void advance() {
                _step = (_step + 1) % _stride;
            }

            Stride operator++() {
                Stride temp = *this;
                advance();
                return temp;
            }

            Stride & operator++(int) {
                advance();
                return *this;
            }

            operator bool() const {
                return _step == 0;
            }

        private:
            unsigned int _stride;
            unsigned int _step;
    };


} // end of util namespace

#endif // INCLUDED_Stride_h_GUID_eaa50b9c_e526_4656_89dc_99008d82447d