90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/*=============================================================================
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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) 2012 Lina Kulakova
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Copyright (C) 2013 Mike Hansen
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******************************************************************************/
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#ifdef T
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#include "templates.h"
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#include <math.h>
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void
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TEMPLATE(T, poly_factor_kaltofen_shoup) (TEMPLATE(T, poly_factor_t) res,
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const TEMPLATE(T, poly_t) poly,
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const TEMPLATE(T, ctx_t) ctx)
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{
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TEMPLATE(T, poly_t) v;
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TEMPLATE(T, poly_factor_t) sq_free, dist_deg;
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slong i, j, k, l, res_num, dist_deg_num;
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slong *degs;
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if (!
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(degs =
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flint_malloc(TEMPLATE(T, poly_degree) (poly, ctx) * sizeof(slong))))
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{
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TEMPLATE_PRINTF("Exception (%s_poly_factor_kaltofen_shoup): \n", T);
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flint_printf("Not enough memory.\n");
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abort();
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}
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TEMPLATE(T, poly_init) (v, ctx);
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TEMPLATE(T, poly_make_monic) (v, poly, ctx);
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/* compute squarefree factorisation */
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TEMPLATE(T, poly_factor_init) (sq_free, ctx);
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TEMPLATE(T, poly_factor_squarefree) (sq_free, v, ctx);
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/* compute distinct-degree factorisation */
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TEMPLATE(T, poly_factor_init) (dist_deg, ctx);
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for (i = 0; i < sq_free->num; i++)
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{
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dist_deg_num = dist_deg->num;
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TEMPLATE(T, poly_factor_distinct_deg) (dist_deg, sq_free->poly + i,
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°s, ctx);
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/* compute equal-degree factorisation */
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for (j = dist_deg_num, l = 0; j < dist_deg->num; j++, l++)
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{
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res_num = res->num;
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TEMPLATE(T, poly_factor_equal_deg) (res, dist_deg->poly + j,
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degs[l], ctx);
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for (k = res_num; k < res->num; k++)
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res->exp[k] = TEMPLATE(T, poly_remove) (v, res->poly + k, ctx);
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}
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}
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flint_free(degs);
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TEMPLATE(T, poly_clear) (v, ctx);
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TEMPLATE(T, poly_factor_clear) (dist_deg, ctx);
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TEMPLATE(T, poly_factor_clear) (sq_free, ctx);
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}
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#endif
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