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71 lines
1.9 KiB
71 lines
1.9 KiB
/*
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* GmmxxAdapter.h
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*
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* Created on: 24.12.2012
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* Author: Christian Dehnert
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*/
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#ifndef STORM_ADAPTERS_GMMXXADAPTER_H_
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#define STORM_ADAPTERS_GMMXXADAPTER_H_
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#include <new>
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#include <utility>
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#include "gmm/gmm_matrix.h"
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#include "src/storage/SparseMatrix.h"
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#include "src/utility/ConversionHelper.h"
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#include "log4cplus/logger.h"
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#include "log4cplus/loggingmacros.h"
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extern log4cplus::Logger logger;
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namespace storm {
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namespace adapters {
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class GmmxxAdapter {
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public:
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/*!
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* Converts a sparse matrix into a sparse matrix in the gmm++ format.
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* @return A pointer to a row-major sparse matrix in gmm++ format.
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*/
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template<class T>
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static std::unique_ptr<gmm::csr_matrix<T>> toGmmxxSparseMatrix(storm::storage::SparseMatrix<T> const& matrix) {
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uint_fast64_t realNonZeros = matrix.getEntryCount();
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LOG4CPLUS_DEBUG(logger, "Converting matrix with " << realNonZeros << " non-zeros to gmm++ format.");
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// Prepare the resulting matrix.
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std::unique_ptr<gmm::csr_matrix<T>> result(new gmm::csr_matrix<T>(matrix.getRowCount(), matrix.getColumnCount()));
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// Copy Row Indications
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std::copy(matrix.rowIndications.begin(), matrix.rowIndications.end(), result->jc.begin());
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// Copy columns and values.
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std::vector<T> values;
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values.reserve(matrix.getEntryCount());
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// To match the correct vector type for gmm, we create the vector with the exact same type.
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decltype(result->ir) columns;
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columns.reserve(matrix.getEntryCount());
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for (auto const& entry : matrix) {
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columns.emplace_back(entry.getColumn());
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values.emplace_back(entry.getValue());
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}
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std::swap(result->ir, columns);
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std::swap(result->pr, values);
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LOG4CPLUS_DEBUG(logger, "Done converting matrix to gmm++ format.");
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return result;
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}
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};
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} //namespace adapters
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} //namespace storm
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#endif /* STORM_ADAPTERS_GMMXXADAPTER_H_ */
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