68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
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/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2011 Fredrik Johansson
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******************************************************************************/
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#include "fmpq_mat.h"
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void fmpq_mat_mul_cleared(fmpq_mat_t C, const fmpq_mat_t A, const fmpq_mat_t B)
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{
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slong i, j;
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fmpz_mat_t Aclear;
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fmpz_mat_t Bclear;
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fmpz_mat_t Cclear;
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fmpz * Aden;
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fmpz * Bden;
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fmpz_mat_init(Aclear, A->r, A->c);
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fmpz_mat_init(Bclear, B->r, B->c);
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fmpz_mat_init(Cclear, A->r, B->c);
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Aden = _fmpz_vec_init(A->r);
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Bden = _fmpz_vec_init(B->c);
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fmpq_mat_get_fmpz_mat_rowwise(Aclear, Aden, A);
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fmpq_mat_get_fmpz_mat_colwise(Bclear, Bden, B);
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fmpz_mat_mul(Cclear, Aclear, Bclear);
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for (i = 0; i < C->r; i++)
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{
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for (j = 0; j < C->c; j++)
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{
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fmpz_set(fmpq_mat_entry_num(C, i, j), fmpz_mat_entry(Cclear, i, j));
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fmpz_mul(fmpq_mat_entry_den(C, i, j), Aden + i, Bden + j);
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fmpq_canonicalise(fmpq_mat_entry(C, i, j));
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}
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}
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fmpz_mat_clear(Aclear);
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fmpz_mat_clear(Bclear);
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fmpz_mat_clear(Cclear);
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_fmpz_vec_clear(Aden, A->r);
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_fmpz_vec_clear(Bden, B->c);
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}
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