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https://github.com/vale981/arb
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71 lines
2 KiB
C
71 lines
2 KiB
C
/*=============================================================================
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This file is part of ARB.
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ARB 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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ARB 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 ARB; 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) 2016 Arb authors
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******************************************************************************/
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#include "bool_mat.h"
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void
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bool_mat_mul(bool_mat_t C, const bool_mat_t A, const bool_mat_t B)
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{
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slong ar, ac, br, bc, i, j, k;
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ar = bool_mat_nrows(A);
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ac = bool_mat_ncols(A);
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br = bool_mat_nrows(B);
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bc = bool_mat_ncols(B);
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if (ac != br || ar != bool_mat_nrows(C) || bc != bool_mat_ncols(C))
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{
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flint_printf("bool_mat_mul: incompatible dimensions\n");
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abort();
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}
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if (br == 0)
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{
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bool_mat_zero(C);
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return;
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}
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if (A == C || B == C)
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{
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bool_mat_t T;
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bool_mat_init(T, ar, bc);
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bool_mat_mul(T, A, B);
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bool_mat_swap(T, C);
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bool_mat_clear(T);
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return;
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}
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for (i = 0; i < ar; i++)
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{
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for (j = 0; j < bc; j++)
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{
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int any = 0;
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for (k = 0; k < br && !any; k++)
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any |= (bool_mat_get_entry(A, i, k) &
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bool_mat_get_entry(B, k, j));
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bool_mat_set_entry(C, i, j, any);
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}
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}
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}
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