/usr/include/hmat/compression.hpp is in libhmat-oss-dev 1.2.0-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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HMat-OSS (HMatrix library, open source software)
Copyright (C) 2014-2015 Airbus Group SAS
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
http://github.com/jeromerobert/hmat-oss
*/
#ifndef _COMPRESSION_HPP
#define _COMPRESSION_HPP
/* Implementation of the algorithms of blocks compression */
#include "data_types.hpp"
/** Choice of the compression method.
*/
#include "assembly.hpp"
namespace hmat {
enum CompressionMethod {
Svd, AcaFull, AcaPartial, AcaPlus, NoCompression
};
class IndexSet;
/** Compress a FullMatrix into an RkMatrix.
The compression uses the reduced SVD, and the accurarcy is
controlled by \a RkMatrix::approx.
\param m The matrix to compress. It is modified but not detroyed by the function.
\param rows The block rows
\param cols The block colums
\return A RkMatrix approximationg the argument \a m.
*/
template<typename T>
RkMatrix<T>* compressMatrix(FullMatrix<T>* m, const IndexSet* rows,
const IndexSet* cols);
/** Compress a block into an RkMatrix.
\param method The compression method
\param f The assembly functions used to compute block elements
\param rows The block rows
\param cols The block colums
\return A RkMatrix representation of the rows x cols block.
*/
template<typename T>
RkMatrix<typename Types<T>::dp>*
compress(CompressionMethod method, const Function<T>& f,
const ClusterData* rows, const ClusterData* cols,
const AllocationObserver & = AllocationObserver());
} // end namespace hmat
#endif
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