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/* Copyright (c) 1997-2024
Ewgenij Gawrilow, Michael Joswig, and the polymake team
Technische Universität Berlin, Germany
https://polymake.org
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version: http://www.gnu.org/licenses/gpl.txt.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
--------------------------------------------------------------------------------
*/
#pragma once
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wshadow"
#pragma clang diagnostic ignored "-Wconversion"
#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"
#elif defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wshadow"
#pragma GCC diagnostic ignored "-Wconversion"
#pragma GCC diagnostic ignored "-Wzero-as-null-pointer-constant"
#endif
#include <flint/fmpz.h>
#include <flint/fmpz_mat.h>
#if defined(__clang__)
#pragma clang diagnostic pop
#elif defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
#include "polymake/Integer.h"
#include "polymake/SparseMatrix.h"
namespace polymake {
namespace common {
namespace flint {
template <typename MatrixType>
void matrix_to_fmpzmat(fmpz_mat_t& fmat, const GenericMatrix<MatrixType>& m)
{
auto intmat = convert_to<Integer>(m);
fmpz_mat_init(fmat,intmat.rows(),intmat.cols());
for (auto r = entire<indexed>(rows(intmat)); !r.at_end(); ++r)
for (auto e = entire<indexed>(*r); !e.at_end(); ++e)
fmpz_set_mpz(fmpz_mat_entry(fmat, r.index(), e.index()), e->get_rep());
}
inline SparseMatrix<Integer> matrix_from_fmpzmat(const fmpz_mat_t& fmat)
{
SparseMatrix<Integer> smat(fmat->r,fmat->c);
for (int i = 0; i < fmat->r; i++)
for (int j = 0; j < fmat->c; j++)
if (!fmpz_is_zero(fmpz_mat_entry(fmat, i,j))) {
mpz_t tmp;
mpz_init(tmp);
fmpz_get_mpz(tmp, fmpz_mat_entry(fmat, i, j));
smat(i,j) = Integer(std::move(tmp));
}
return smat;
}
}
template <typename MatrixType>
SparseMatrix<Integer> smith_normal_form_flint(const GenericMatrix<MatrixType>& m) {
fmpz_mat_t in, res;
fmpz_mat_init(res,m.rows(),m.cols());
flint::matrix_to_fmpzmat(in, m);
fmpz_mat_snf(res, in);
fmpz_mat_clear(in);
SparseMatrix<Integer> sparseres(flint::matrix_from_fmpzmat(res));
fmpz_mat_clear(res);
return sparseres;
}
} }
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