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/*
 *   Copyright (c) 2011, Michael Lehn
 *
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *   1) Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *   2) Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in
 *      the documentation and/or other materials provided with the
 *      distribution.
 *   3) Neither the name of the FLENS development group nor the names of
 *      its contributors may be used to endorse or promote products derived
 *      from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/* Based on
 *
      SUBROUTINE DLAQR4( WANTT, WANTZ, N, ILO, IHI, H, LDH, WR, WI,
     $                   ILOZ, IHIZ, Z, LDZ, WORK, LWORK, INFO )
 *
 *  -- LAPACK auxiliary routine (version 3.2) --
 *     Univ. of Tennessee, Univ. of California Berkeley,
 *     Univ. of Colorado Denver and NAG Ltd..
 *     November 2006
 */

#ifndef FLENS_LAPACK_LA_LAQR4_H
#define FLENS_LAPACK_LA_LAQR4_H 1

#include <flens/matrixtypes/matrixtypes.h>
#include <flens/vectortypes/vectortypes.h>

namespace flens { namespace lapack {

//== laqr4 =====================================================================
template <typename IndexType, typename MH>
    IndexType
    laqr4_wsq(bool                  wantT,
              bool                  wantZ,
              IndexType             iLo,
              IndexType             iHi,
              const GeMatrix<MH>    &H);

template <typename IndexType, typename MH, typename VWR, typename VWI,
          typename MZ, typename VWORK>
    IndexType
    laqr4(bool                      wantT,
          bool                      wantZ,
          IndexType                 iLo,
          IndexType                 iHi,
          GeMatrix<MH>              &H,
          DenseVector<VWR>          &wr,
          DenseVector<VWI>          &wi,
          IndexType                 iLoZ,
          IndexType                 iHiZ,
          GeMatrix<MZ>              &Z,
          DenseVector<VWORK>        &work);

//-- forwarding ----------------------------------------------------------------
template <typename IndexType, typename MH>
    IndexType
    laqr4_wsq(bool                  wantT,
              bool                  wantZ,
              IndexType             iLo,
              IndexType             iHi,
              const MH              &&H);

template <typename IndexType, typename MH, typename VWR, typename VWI,
          typename MZ, typename VWORK>
    IndexType
    laqr4(bool                      wantT,
          bool                      wantZ,
          IndexType                 iLo,
          IndexType                 iHi,
          MH                        &&H,
          VWR                       &&wr,
          VWI                       &&wi,
          IndexType                 iLoZ,
          IndexType                 iHiZ,
          MZ                        &&Z,
          VWORK                     &&work);

} } // namespace lapack, flens

#endif // FLENS_LAPACK_LA_LAQR4_H