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/* Test mpf_set_q.
Copyright 2004 Free Software Foundation, Inc.
This file is part of the GNU MP Library test suite.
The GNU MP Library test suite is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
The GNU MP Library test suite is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
Public License for more details.
You should have received a copy of the GNU General Public License along with
the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp-impl.h"
#include "tests.h"
void
check_one (mpf_ptr got, mpq_srcptr q)
{
mpf_t n, d;
mpf_set_q (got, q);
PTR(n) = PTR(&q->_mp_num);
SIZ(n) = SIZ(&q->_mp_num);
EXP(n) = ABSIZ(&q->_mp_num);
PTR(d) = PTR(&q->_mp_den);
SIZ(d) = SIZ(&q->_mp_den);
EXP(d) = ABSIZ(&q->_mp_den);
if (! refmpf_validate_division ("mpf_set_q", got, n, d))
{
mp_trace_base = -16;
mpq_trace (" q", q);
abort ();
}
}
void
check_rand (void)
{
unsigned long min_prec = __GMPF_BITS_TO_PREC (1);
gmp_randstate_ptr rands = RANDS;
unsigned long prec;
mpf_t got;
mpq_t q;
int i;
mpf_init (got);
mpq_init (q);
for (i = 0; i < 400; i++)
{
/* result precision */
prec = min_prec + gmp_urandomm_ui (rands, 20L);
refmpf_set_prec_limbs (got, prec);
/* num */
prec = gmp_urandomm_ui (rands, 20L * GMP_NUMB_BITS);
mpz_rrandomb (mpq_numref(q), rands, prec);
/* possibly negative num */
if (gmp_urandomb_ui (rands, 1L))
mpz_neg (mpq_numref(q), mpq_numref(q));
/* den, non-zero */
do {
prec = gmp_urandomm_ui (rands, 20L * GMP_NUMB_BITS);
mpz_rrandomb (mpq_denref(q), rands, prec);
} while (mpz_sgn (mpq_denref(q)) <= 0);
check_one (got, q);
}
mpf_clear (got);
mpq_clear (q);
}
void
check_various (void)
{
mpf_t got;
mpq_t q;
mpf_init (got);
mpq_init (q);
/* 1/1 == 1 */
mpf_set_prec (got, 20L);
mpq_set_ui (q, 1L, 1L);
mpf_set_q (got, q);
MPF_CHECK_FORMAT (got);
ASSERT_ALWAYS (mpf_cmp_ui (got, 1L) == 0);
/* 1/(2^n+1), a case where truncating the divisor would be wrong */
mpf_set_prec (got, 500L);
mpq_set_ui (q, 1L, 1L);
mpz_mul_2exp (mpq_denref(q), mpq_denref(q), 800L);
mpz_add_ui (mpq_denref(q), mpq_denref(q), 1L);
check_one (got, q);
mpf_clear (got);
mpq_clear (q);
}
int
main (void)
{
tests_start ();
check_various ();
check_rand ();
tests_end ();
exit (0);
}
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