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/*
* Copyright 2008-2009 NVIDIA Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*! \file linear_operator.h
* \brief Abstract interface for iterative solvers
*/
#pragma once
#include <cusp/detail/config.h>
#include <cusp/format.h>
#include <cusp/blas.h>
#include <cusp/exception.h>
#include <cusp/detail/matrix_base.h>
namespace cusp
{
template <typename ValueType, typename MemorySpace, typename IndexType=int>
class linear_operator : public cusp::detail::matrix_base<IndexType,ValueType,MemorySpace,cusp::unknown_format>
{
typedef cusp::detail::matrix_base<IndexType,ValueType,MemorySpace,cusp::unknown_format> Parent;
public:
linear_operator()
: Parent() {}
linear_operator(IndexType num_rows, IndexType num_cols)
: Parent(num_rows, num_cols) {}
linear_operator(IndexType num_rows, IndexType num_cols, IndexType num_entries)
: Parent(num_rows, num_cols, num_entries) {}
}; // linear_operator
template <typename ValueType, typename MemorySpace, typename IndexType=int>
class identity_operator : public linear_operator<ValueType,MemorySpace,IndexType>
{
typedef linear_operator<ValueType,MemorySpace> Parent;
public:
identity_operator()
: Parent() {}
identity_operator(IndexType num_rows, IndexType num_cols)
: Parent(num_rows, num_cols) {}
template <typename VectorType1,
typename VectorType2>
void operator()(const VectorType1& x, VectorType2& y) const
{
cusp::blas::copy(x, y);
}
}; // identity_operator
} // end namespace cusp
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