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/*
* Copyright (c) 2012, Michael Lehn, Klaus Pototzky
*
* 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.
*/
#ifndef FLENS_STORAGE_BANDSTORAGE_CONSTBANDSTORAGEVIEW_TCC
#define FLENS_STORAGE_BANDSTORAGE_CONSTBANDSTORAGEVIEW_TCC 1
#include <flens/storage/bandstorage/constbandstorageview.h>
#include <flens/typedefs.h>
#include <ulmblas/cxxblas.h>
namespace flens {
template <typename T, StorageOrder Order, typename I, typename A>
ConstBandStorageView<T, Order, I, A>::ConstBandStorageView(
IndexType numRows, IndexType numCols,
IndexType numSubDiags,
IndexType numSuperDiags,
const ElementType *data,
IndexType leadingDimension,
IndexType firstIndex,
const Allocator &allocator)
: data_(data), allocator_(allocator), numRows_(numRows), numCols_(numCols),
numSubDiags_(numSubDiags), numSuperDiags_(numSuperDiags),
firstIndex_(firstIndex),
leadingDimension_(leadingDimension)
{
ASSERT(numRows_>=0);
ASSERT(numCols_>=0);
ASSERT(numSubDiags_>=0);
ASSERT(numSuperDiags_>=0);
}
template <typename T, StorageOrder Order, typename I, typename A>
ConstBandStorageView<T, Order, I, A>::ConstBandStorageView(
const ConstBandStorageView &rhs)
: data_(rhs.data_),
allocator_(rhs.allocator_),
numRows_(rhs.numRows()), numCols_(rhs.numCols()),
numSubDiags_(rhs.numSubDiags()), numSuperDiags_(rhs.numSuperDiags()),
firstIndex_(rhs.firstIndex()),leadingDimension_(rhs.leadingDimension())
{
}
template <typename T, StorageOrder Order, typename I, typename A>
template <typename RHS>
ConstBandStorageView<T, Order, I, A>::ConstBandStorageView(const RHS &rhs)
: data_(rhs.data()),
allocator_(rhs.allocator()),
numRows_(rhs.numRows()), numCols_(rhs.numCols()),
numSubDiags_(rhs.numSubDiags()), numSuperDiags_(rhs.numSuperDiags()),
firstIndex_(rhs.firstIndex()),
leadingDimension_(rhs.leadingDimension())
{
// changeIndexBase(rhs.firstIndex());
}
template <typename T, StorageOrder Order, typename I, typename A>
ConstBandStorageView<T, Order, I, A>::~ConstBandStorageView()
{
}
//-- operators -----------------------------------------------------------------
template <typename T, StorageOrder Order, typename I, typename A>
const typename ConstBandStorageView<T, Order, I, A>::ElementType &
ConstBandStorageView<T, Order, I, A>::operator()(IndexType row,
IndexType col) const
{
ASSERT(row>=firstIndex_);
ASSERT(row<firstIndex_+numRows_);
ASSERT(col>=firstIndex_);
ASSERT(col<firstIndex_+numCols_);
ASSERT(max(firstIndex_,col-numSuperDiags_) <= row);
ASSERT(row <= min(numRows_+firstIndex_-1,col+numSubDiags_));
if (Order == ColMajor) {
const IndexType i = numSuperDiags_+row-col;
const IndexType j = col-firstIndex_;
const IndexType storageNumRows = numSubDiags_+numSuperDiags_+1;
return data_[j*leadingDimension_+i];
}
const IndexType i = numSubDiags_+col-row;
const IndexType j = row-firstIndex_;
const IndexType storageNumRows = numSubDiags_+numSuperDiags_+1;
return data_[j*leadingDimension_+i];
}
//-- methods -------------------------------------------------------------------
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::firstRow() const
{
return firstIndex_;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::firstCol() const
{
return firstIndex_;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::lastRow() const
{
return firstIndex_+numRows_-1;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::lastCol() const
{
return firstIndex_+numCols_-1;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::firstIndex() const
{
return firstIndex_;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::lastIndex() const
{
return firstIndex_+numCols_-1;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::numRows() const
{
return numRows_;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::numCols() const
{
return numCols_;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::numSubDiags() const
{
return numSubDiags_;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::numSuperDiags() const
{
return numSuperDiags_;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::dim() const
{
ASSERT(numCols_ == numRows_);
return numCols_;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::leadingDimension() const
{
return leadingDimension_;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::strideRow() const
{
return (Order==ColMajor) ? 1
: leadingDimension()-1;
}
template <typename T, StorageOrder Order, typename I, typename A>
typename ConstBandStorageView<T, Order, I, A>::IndexType
ConstBandStorageView<T, Order, I, A>::strideCol() const
{
return (Order==ColMajor) ? leadingDimension()-1
: 1;
}
template <typename T, StorageOrder Order, typename I, typename A>
const typename ConstBandStorageView<T, Order, I, A>::ElementType *
ConstBandStorageView<T, Order, I, A>::data() const
{
return data_;
}
template <typename T, StorageOrder Order, typename I, typename A>
const typename ConstBandStorageView<T, Order, I, A>::Allocator &
ConstBandStorageView<T, Order, I, A>::allocator() const
{
return allocator_;
}
template <typename T, StorageOrder Order, typename I, typename A>
void
ConstBandStorageView<T, Order, I, A>::changeIndexBase(IndexType firstIndex)
{
firstIndex_ = firstIndex;
}
// view of fullstorage scheme as an array
template <typename T, StorageOrder Order, typename I, typename A>
const typename ConstBandStorageView<T, Order, I, A>::ConstArrayView
ConstBandStorageView<T, Order, I, A>::arrayView(IndexType firstViewIndex) const
{
if (Order==RowMajor) {
return ConstArrayView(leadingDimension_*numRows_,
data_,
IndexType(1),
firstViewIndex,
allocator());
}
return ConstArrayView(leadingDimension_*numRows_,
data_,
IndexType(1),
firstViewIndex,
allocator());
}
// View a diagonal
template <typename T, StorageOrder Order, typename I, typename A>
const typename ConstBandStorageView<T, Order, I, A>::ConstArrayView
ConstBandStorageView<T, Order, I, A>::viewDiag(IndexType diag,
IndexType firstViewIndex) const
{
ASSERT( diag <= numSuperDiags_);
ASSERT(-diag <= numSubDiags_);
using std::min;
const IndexType i = (diag < 0) ? -diag+firstViewIndex: firstViewIndex;
const IndexType j = (diag > 0) ? diag+firstViewIndex: firstViewIndex;
const IndexType length = (diag<=0) ? min(numCols_, numRows_+diag)
: min(numCols_-diag, numRows_);
return ConstArrayView(length-firstViewIndex+firstIndex_,
&(operator()(i, j)),
leadingDimension_,
firstIndex_, allocator_);
}
template <typename T, StorageOrder Order, typename I, typename A>
const typename ConstBandStorageView<T, Order, I, A>::ConstView
ConstBandStorageView<T, Order, I, A>::viewDiags(IndexType fromDiag,
IndexType toDiag) const
{
ASSERT(fromDiag<=toDiag);
IndexType numRows = numRows_;
IndexType numCols = numCols_;
if (fromDiag>0) {
numCols = numCols_ - fromDiag;
if (numRows_<numCols_) {
if (numCols_-numRows_ < fromDiag) {
numRows = numCols_ - fromDiag;
}
} else {
numRows = numCols_ - fromDiag;
}
}
if (toDiag<0) {
numRows = numRows_ + toDiag;
if (numCols_<numRows_) {
if (numRows_-numCols_ < -toDiag) {
numCols = numRows_ + toDiag;
}
} else {
numCols = numRows_ + toDiag;
}
}
const IndexType i = firstIndex_ - ((toDiag<0) ? toDiag : 0);
const IndexType j = firstIndex_ + ((fromDiag>0) ? fromDiag : 0);
if (Order == RowMajor ) {
if (toDiag < 0) {
return ConstView(numRows, numCols, -fromDiag+toDiag, 0,
&(operator()(i,j)) + fromDiag-toDiag ,
leadingDimension_,
firstIndex_, allocator_);
}
if (fromDiag > 0) {
return ConstView(numRows, numCols, 0, toDiag-fromDiag,
&(operator()(i,j)),
leadingDimension_,
firstIndex_, allocator_);
}
return ConstView(numRows, numCols, -fromDiag, toDiag,
data_ + numSubDiags_+fromDiag,
leadingDimension_,
firstIndex_, allocator_);
}
if (toDiag < 0) {
return ConstView(numRows, numCols, -fromDiag+toDiag, 0,
&(operator()(i,j)),
leadingDimension_,
firstIndex_, allocator_);
}
if (fromDiag > 0) {
return ConstView(numRows, numCols, 0, toDiag-fromDiag,
&(operator()(i,j)) + fromDiag-toDiag,
leadingDimension_,
firstIndex_, allocator_);
}
return ConstView(numRows_, numCols_, -fromDiag, toDiag,
data_ + (numSuperDiags_-toDiag),
leadingDimension_,
firstIndex_, allocator_);
}
// view of single row
template <typename T, StorageOrder Order, typename I, typename A>
const typename ConstBandStorageView<T, Order, I, A>::ConstArrayView
ConstBandStorageView<T, Order, I, A>::viewRow(IndexType row,
IndexType firstViewIndex) const
{
# ifndef NDEBUG
// prevent an out-of-bound assertion in case a view is empty anyway
if (numCols()==0) {
return ConstArrayView(numCols(), 0, strideCol(),
firstViewIndex, allocator());
}
# endif
ASSERT(row>=firstRow());
ASSERT(row<=lastRow());
IndexType length = 1
+ min(row-1,numSubDiags())
+ min(numRows()-row,numSuperDiags());
return ConstArrayView(length,
&(operator()(row,
firstCol()+max(0,row-1-numSubDiags()))),
strideCol(),
firstViewIndex,
allocator());
}
template <typename T, StorageOrder Order, typename I, typename A>
const typename ConstBandStorageView<T, Order, I, A>::ConstArrayView
ConstBandStorageView<T, Order, I, A>::viewRow(IndexType row,
IndexType firstCol,
IndexType lastCol,
IndexType stride,
IndexType firstViewIndex) const
{
const IndexType length = (lastCol-firstCol)/stride+1;
# ifndef NDEBUG
// prevent an out-of-bound assertion in case a view is empty anyway
if (length==0) {
return ConstArrayView(length, 0, strideCol()*stride,
firstViewIndex, allocator());
}
# endif
ASSERT(row>=firstRow());
ASSERT(row<=lastRow());
return ConstArrayView(length,
&(operator()(row, firstCol)),
strideCol()*stride,
firstViewIndex,
allocator());
}
// view of single row
template <typename T, StorageOrder Order, typename I, typename A>
const typename ConstBandStorageView<T, Order, I, A>::ConstArrayView
ConstBandStorageView<T, Order, I, A>::viewCol(IndexType col,
IndexType firstViewIndex) const
{
# ifndef NDEBUG
// prevent an out-of-bound assertion in case a view is empty anyway
if (numRows()==0) {
return ArrayView(numRows(), 0, strideRow(),
firstViewIndex, allocator());
}
# endif
ASSERT(col>=firstCol());
ASSERT(col<=lastCol());
IndexType length = 1
+ min(col-1, numSuperDiags())
+ min(numCols()-col, numSubDiags());
return ArrayView(length,
&(operator()(firstRow()+max(0,col-1-numSuperDiags()),
col)),
strideRow(),
firstViewIndex,
allocator());
}
template <typename T, StorageOrder Order, typename I, typename A>
const typename ConstBandStorageView<T, Order, I, A>::ConstArrayView
ConstBandStorageView<T, Order, I, A>::viewCol(IndexType firstRow,
IndexType lastRow,
IndexType stride, IndexType col,
IndexType firstViewIndex) const
{
const IndexType length = (lastRow-firstRow)/stride+1;
# ifndef NDEBUG
// prevent an out-of-bound assertion in case a view is empty anyway
if (length==0) {
return ConstArrayView(length, 0, strideRow()*stride,
firstViewIndex, allocator());
}
# endif
ASSERT(col>=firstCol());
ASSERT(col<=lastCol());
return ConstArrayView(length,
&(operator()(firstRow, col)),
strideRow()*stride,
firstViewIndex,
allocator());
}
} // namespace flens
#endif // FLENS_STORAGE_BANDSTORAGE_CONSTBANDSTORAGEVIEW_TCC
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