69 lines
2.1 KiB
C
69 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, 2012 Sebastian Pancratz
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Copyright (C) 2012 Andres Goens
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Copyright (C) 2013 Mike Hansen
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******************************************************************************/
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#include "fq_nmod.h"
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void fq_nmod_randtest(fq_nmod_t rop, flint_rand_t state, const fq_nmod_ctx_t ctx)
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{
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const slong d = fq_nmod_ctx_degree(ctx);
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slong i, sparse;
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nmod_poly_fit_length(rop, d);
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if (n_randint(state, 2))
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{
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for (i = 0; i < d; i++)
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rop->coeffs[i] = n_randint(state, ctx->mod.n);
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}
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else
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{
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sparse = 1 + n_randint(state, FLINT_MAX(2, d));
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for (i = 0; i < d; i++)
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if (n_randint(state, sparse))
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rop->coeffs[i] = WORD(0);
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else
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rop->coeffs[i] = n_randint(state, ctx->mod.n);
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}
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_nmod_poly_set_length(rop, d);
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_nmod_poly_normalise(rop);
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}
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void fq_nmod_randtest_not_zero(fq_nmod_t rop, flint_rand_t state, const fq_nmod_ctx_t ctx)
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{
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slong i;
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fq_nmod_randtest(rop, state, ctx);
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for (i = 0; fq_nmod_is_zero(rop, ctx) && (i < 10); i++)
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fq_nmod_randtest(rop, state, ctx);
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if (fq_nmod_is_zero(rop, ctx))
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fq_nmod_one(rop, ctx);
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}
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