File: multi_dim.hpp

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#ifndef MULTI_DIM_HPP
#define MULTI_DIM_HPP

#include <boost/array.hpp>
#include <vector>
#include <cassert>
#include <stdexcept>

namespace multi_dim{
  using boost::array;
  using std::vector;
  using std::range_error;

  template<typename ElementType_, std::size_t SIZE1_, std::size_t SIZE2_>
  class Array2D{
    
  private:
    typedef array<ElementType_, SIZE1_ * SIZE2_> Container_;

  public:
    typedef typename Container_::value_type      value_type;
    typedef typename Container_::reference       reference;
    typedef typename Container_::const_reference const_reference;
    typedef typename Container_::size_type       size_type;

  public:
    reference at(const size_type i, const size_type j)
    {
      rangeCheck_(i, j);
      return buffer_[i * SIZE2_ + j];
    }

    const_reference at(const size_type i, const size_type j) const
    {
      rangeCheck_(i, j);
      return buffer_[i * SIZE2_ + j];
    }

    inline reference operator()(const size_type i, const size_type j)
    {
      return buffer_[i * SIZE2_ + j];
    }

    inline const_reference operator()(const size_type i, const size_type j) const
    {
      return buffer_[i * SIZE2_ + j];
    }

    size_type size1() const
    {
      return SIZE1_;
    }
    size_type size2() const
    {
      return SIZE2_;
    }

  private:
    void rangeCheck_(const size_type i, const size_type j) const
    {
      if((i >= SIZE1_) || (j >= SIZE2_))
	throw range_error();
    }
      

  private:
    Container_ buffer_;
  };

  template<typename ElementType_>
  class Matrix{
  private:
    typedef std::vector<ElementType_>   Container_;
  public:
    typedef typename Container_::value_type              value_type;
    typedef typename Container_::reference               reference;
    typedef typename Container_::const_reference         const_reference;
    typedef typename Container_::size_type               size_type;


  public:
    Matrix(const size_type nrows, const size_type ncols)
      : buffer_(nrows * ncols), size1_(nrows), size2_(ncols)
    {}


#if MATRIX_RESIZABLE
    
    Matrix()
      : buffer_(), size1_(0), size2_(0)
    {}

    void clear()
    {
      size1_ = 0;
      size2_ = 0;
      buffer_.clear();
    }

    void resize(const size_type nrows, const size_type ncols)
    {
      size1_ = nrows;
      size2_ = ncols;
      buffer_.resize(nrows * ncols);
    }
#endif // MATRIX_RESIZABLE

    reference at(const size_type i, const size_type j)
    {
      rangeCheck_(i, j);
      return buffer_[i * size2_ + j];
    }
    
    const_reference at(const size_type i, const size_type j) const
    {
      rangeCheck_(i, j);
      return buffer_[i * size2_ + j];
    }

    inline reference operator()(const size_type i, const size_type j)
    {
      return buffer_[i * size2_ + j];
    }
    
    inline const_reference operator()(const size_type i, const size_type j) const
    {
      return buffer_[i * size2_ + j];
    }

    size_type size1() const
    {
      return size1_;
    }
    
    size_type size2() const
    {
      return size2_;
    }

  private:
    void rangeCheck_(const size_type i, const size_type j) const
    {
      if((i >= size1_) || (j >= size2_))
	throw range_error();
    }
      

      
  private:
    Container_ buffer_;
    size_type size1_, size2_;
  };

}

#endif