sparse.cpp

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#include <sparse.hpp>
 
#include <ladel_global.h> // ladel_sparse_free etc.
 
#include <algorithm> // copy_n
#include <cassert>
 
namespace qpalm {
 
ladel_sparse_matrix eigen_to_ladel(sparse_mat_t &mat, ladel_int symmetry) {
    ladel_sparse_matrix res{};
    res.nzmax    = mat.nonZeros();
    res.nrow     = mat.rows();
    res.ncol     = mat.cols();
    res.p        = mat.outerIndexPtr(); // column pointers
    res.i        = mat.innerIndexPtr(); // row indices
    res.x        = mat.valuePtr();
    res.nz       = mat.innerNonZeroPtr();
    res.values   = TRUE;
    res.symmetry = symmetry;
    return res;
}
 
namespace alloc {
void ladel_sparse_matrix_deleter::operator()(ladel_sparse_matrix *M) const {
    ::ladel_sparse_free(M);
}
} // namespace alloc
 
ladel_sparse_matrix_ptr eigen_to_ladel_copy(const sparse_mat_t &mat) {
    ladel_int nz = mat.innerNonZeroPtr() == nullptr ? FALSE : TRUE;
    auto res     = ::ladel_sparse_alloc(mat.rows(), mat.cols(), mat.nonZeros(),
                                        UNSYMMETRIC, TRUE, nz);
    assert(mat.outerSize() + 1 <= res->ncol + 1);
    std::copy_n(mat.outerIndexPtr(), mat.outerSize() + 1, res->p);
    assert(mat.nonZeros() <= res->nzmax);
    std::copy_n(mat.innerIndexPtr(), mat.nonZeros(), res->i);
    assert(mat.nonZeros() <= res->nzmax);
    std::copy_n(mat.valuePtr(), mat.nonZeros(), res->x);
    if (mat.innerNonZeroPtr() != nullptr) {
        assert(mat.outerSize() <= res->ncol);
        std::copy_n(mat.innerNonZeroPtr(), mat.outerSize(), res->nz);
    }
    return ladel_sparse_matrix_ptr{res};
}
 
} // namespace qpalm