127 lines
3.4 KiB
C
127 lines
3.4 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) 2010 William Hart
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Copyright (C) 2010 Sebastian Pancratz
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******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <gmp.h>
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#include "flint.h"
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#include "fmpz.h"
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#include "fmpz_vec.h"
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#include "fmpq_poly.h"
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#include "ulong_extras.h"
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void fmpq_poly_randtest(fmpq_poly_t poly, flint_rand_t state,
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slong len, mp_bitcnt_t bits)
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{
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ulong m;
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m = n_randlimb(state);
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fmpq_poly_fit_length(poly, len);
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_fmpq_poly_set_length(poly, len);
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if (m & UWORD(1))
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{
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_fmpz_vec_randtest(poly->coeffs, state, len, bits);
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}
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else
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{
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fmpz_t x;
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fmpz_init(x);
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fmpz_randtest(x, state, bits / 2);
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_fmpz_vec_randtest(poly->coeffs, state, len, (bits + 1) / 2);
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_fmpz_vec_scalar_mul_fmpz(poly->coeffs, poly->coeffs, len, x);
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fmpz_clear(x);
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}
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if (m & UWORD(2))
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{
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fmpz_randtest_not_zero(poly->den, state, FLINT_MAX(bits, 1));
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fmpz_abs(poly->den, poly->den);
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fmpq_poly_canonicalise(poly);
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}
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else
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{
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fmpz_one(poly->den);
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_fmpq_poly_normalise(poly);
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}
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}
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void fmpq_poly_randtest_unsigned(fmpq_poly_t poly, flint_rand_t state,
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slong len, mp_bitcnt_t bits)
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{
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ulong m;
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m = n_randlimb(state);
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fmpq_poly_fit_length(poly, len);
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_fmpq_poly_set_length(poly, len);
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if (m & UWORD(1))
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{
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_fmpz_vec_randtest_unsigned(poly->coeffs, state, len, bits);
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}
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else
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{
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fmpz_t x;
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fmpz_init(x);
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fmpz_randtest_unsigned(x, state, bits / 2);
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_fmpz_vec_randtest_unsigned(poly->coeffs, state, len, (bits + 1) / 2);
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_fmpz_vec_scalar_mul_fmpz(poly->coeffs, poly->coeffs, len, x);
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fmpz_clear(x);
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}
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if (m & UWORD(2))
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{
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fmpz_randtest_not_zero(poly->den, state, FLINT_MAX(bits, 1));
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fmpz_abs(poly->den, poly->den);
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fmpq_poly_canonicalise(poly);
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}
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else
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{
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fmpz_one(poly->den);
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_fmpq_poly_normalise(poly);
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}
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}
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void fmpq_poly_randtest_not_zero(fmpq_poly_t f, flint_rand_t state,
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slong len, mp_bitcnt_t bits)
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{
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if ((bits == 0) | (len == 0))
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{
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flint_printf("Exception (fmpq_poly_randtest_not_zeo). bits == 0.\n");
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abort();
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}
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fmpq_poly_randtest(f, state, len, bits);
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if (f->length == 0)
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fmpq_poly_set_ui(f, 1);
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}
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