82 lines
2.2 KiB
C
82 lines
2.2 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.h"
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void
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_fmpq_randtest(fmpz_t num, fmpz_t den, flint_rand_t state, mp_bitcnt_t bits)
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{
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mp_limb_t x = n_randlimb(state);
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fmpz_randtest(num, state, bits);
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fmpz_randtest_not_zero(den, state, bits);
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switch (x % 16)
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{
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case 0:
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fmpz_set_si(num, 1);
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break;
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case 1:
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fmpz_set_si(num, -1);
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break;
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case 2:
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fmpz_set_si(num, 2);
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break;
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case 3:
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fmpz_set_si(num, -2);
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break;
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}
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switch ((x / 16) % 16)
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{
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case 0:
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fmpz_set_si(den, 1);
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break;
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case 2:
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fmpz_set_si(den, 2);
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break;
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}
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_fmpq_canonicalise(num, den);
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}
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void fmpq_randtest(fmpq_t res, flint_rand_t state, mp_bitcnt_t bits)
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{
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_fmpq_randtest(fmpq_numref(res), fmpq_denref(res), state, bits);
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}
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void fmpq_randtest_not_zero(fmpq_t f, flint_rand_t state, mp_bitcnt_t bits)
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{
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if (bits == 0)
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{
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flint_printf("Exception (fmpq_randtest_not_zero). bits == 0.\n");
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abort();
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}
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do {
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fmpq_randtest(f, state, bits);
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} while (fmpq_is_zero(f));
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}
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