base_case_matrix.hpp

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// Software License for MTL
// 
// Copyright (c) 2007 The Trustees of Indiana University. All rights reserved.
// Authors: Peter Gottschling and Andrew Lumsdaine
// 
// This file is part of the Matrix Template Library
// 
// See also license.mtl.txt in the distribution.

#ifndef MTL_BASE_CASE_MATRIX_INCLUDE
#define MTL_BASE_CASE_MATRIX_INCLUDE

#include <boost/static_assert.hpp>

#include <boost/numeric/meta_math/is_power_of_2.hpp>
#include <boost/numeric/meta_math/log_2.hpp>
#include <boost/numeric/mtl/recursion/base_case_test.hpp>
#include <boost/numeric/mtl/recursion/bit_masking.hpp>

namespace mtl { namespace recursion {

template <typename Matrix, typename BaseCaseTest>
struct base_case_matrix
{
    typedef Matrix type;
};

template <typename Elt, unsigned long Mask, typename Parameters, typename BaseCaseTest>
struct base_case_matrix<morton_dense<Elt, Mask, Parameters>, BaseCaseTest>
{
    BOOST_STATIC_ASSERT(meta_math::is_power_of_2<BaseCaseTest::base_case_size>::value);
    static const unsigned long base_case_bits= meta_math::log_2<BaseCaseTest::base_case_size>::value;

    typedef typename boost::mpl::if_<
	is_k_power_base_case_row_major<base_case_bits, Mask>
      , dense2D<Elt, matrix::parameters<row_major> >
      , typename boost::mpl::if_<
	    is_k_power_base_case_col_major<base_case_bits, Mask>
	  , dense2D<Elt, matrix::parameters<col_major> >
          , morton_dense<Elt, Mask, Parameters>
        >::type
    >::type type;
};


}} // namespace mtl::recursion

#endif // MTL_BASE_CASE_MATRIX_INCLUDE