cpu_format_csr.hpp

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#ifndef SPLA_CPU_FORMAT_CSR_HPP
#define SPLA_CPU_FORMAT_CSR_HPP
 
#include <cpu/cpu_formats.hpp>
 
namespace spla {
 
    template<typename T>
    void cpu_csr_resize(const uint n_rows,
                        const uint n_values,
                        CpuCsr<T>& storage) {
        storage.Ap.resize(n_rows + 1);
        storage.Aj.resize(n_values);
        storage.Ax.resize(n_values);
        storage.values = n_values;
    }
 
    template<typename T>
    void cpu_csr_to_dok(uint             n_rows,
                        const CpuCsr<T>& in,
                        CpuDok<T>&       out) {
        auto& Ap = in.Ap;
        auto& Aj = in.Aj;
        auto& Ax = in.Ax;
 
        assert(out.Ax.empty());
 
        for (uint i = 0; i < n_rows; i++) {
            for (uint j = Ap[i]; j < Ap[i + 1]; j++) {
                out.Ax.insert(robin_hood::pair<std::pair<uint, uint>, T>(std::pair<uint, uint>(i, Aj[j]), Ax[j]));
            }
        }
    }
 
    template<typename T>
    void cpu_csr_to_coo(uint             n_rows,
                        const CpuCsr<T>& in,
                        CpuCoo<T>&       out) {
        auto& Ap = in.Ap;
        auto& Aj = in.Aj;
        auto& Ax = in.Ax;
 
        auto& Ri = out.Ai;
        auto& Rj = out.Aj;
        auto& Rx = out.Ax;
 
        assert(Ri.size() == in.values);
        assert(Rj.size() == in.values);
        assert(Rx.size() == in.values);
 
        for (uint i = 0; i < n_rows; i++) {
            for (uint j = Ap[i]; j < Ap[i + 1]; j++) {
                Ri[j] = i;
                Rj[j] = Aj[j];
                Rx[j] = Ax[j];
            }
        }
    }
 
}// namespace spla
 
#endif//SPLA_CPU_FORMAT_CSR_HPP