// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2012 Chen-Pang He <jdh8@ms63.hinet.net>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

#ifndef EIGEN_GENERAL_RANK1UPDATE_H
#define EIGEN_GENERAL_RANK1UPDATE_H

namespace internal {

/* Optimized matrix += alpha * uv' */
template<typename Scalar, typename Index, bool ConjRhs>
struct general_rank1_update
{
  static void run(Index rows, Index cols, Scalar* mat, Index stride, const Scalar* u, const Scalar* v, Scalar alpha)
  {
    typedef Matrix<Scalar,Dynamic,1> PlainVector;
    internal::conj_if<ConjRhs> cj;
    for (Index i=0; i<cols; ++i)
      Map<PlainVector>(mat+stride*i,rows) += alpha * cj(v[i]) * Map<const PlainVector>(u,rows);
  }
};

} // end namespace internal

#endif // EIGEN_GENERAL_RANK1UPDATE_H