130 lines
3.0 KiB
C
130 lines
3.0 KiB
C
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/* Test mpf_set_q.
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Copyright 2004 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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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 "gmp-impl.h"
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#include "tests.h"
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void
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check_one (mpf_ptr got, mpq_srcptr q)
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{
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mpf_t n, d;
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mpf_set_q (got, q);
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PTR(n) = PTR(&q->_mp_num);
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SIZ(n) = SIZ(&q->_mp_num);
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EXP(n) = ABSIZ(&q->_mp_num);
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PTR(d) = PTR(&q->_mp_den);
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SIZ(d) = SIZ(&q->_mp_den);
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EXP(d) = ABSIZ(&q->_mp_den);
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if (! refmpf_validate_division ("mpf_set_q", got, n, d))
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{
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mp_trace_base = -16;
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mpq_trace (" q", q);
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abort ();
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}
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}
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void
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check_rand (void)
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{
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unsigned long min_prec = __GMPF_BITS_TO_PREC (1);
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gmp_randstate_ptr rands = RANDS;
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unsigned long prec;
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mpf_t got;
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mpq_t q;
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int i;
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mpf_init (got);
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mpq_init (q);
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for (i = 0; i < 400; i++)
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{
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/* result precision */
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prec = min_prec + gmp_urandomm_ui (rands, 20L);
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refmpf_set_prec_limbs (got, prec);
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/* num */
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prec = gmp_urandomm_ui (rands, 20L * GMP_NUMB_BITS);
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mpz_rrandomb (mpq_numref(q), rands, prec);
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/* possibly negative num */
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if (gmp_urandomb_ui (rands, 1L))
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mpz_neg (mpq_numref(q), mpq_numref(q));
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/* den, non-zero */
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do {
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prec = gmp_urandomm_ui (rands, 20L * GMP_NUMB_BITS);
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mpz_rrandomb (mpq_denref(q), rands, prec);
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} while (mpz_sgn (mpq_denref(q)) <= 0);
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check_one (got, q);
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}
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mpf_clear (got);
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mpq_clear (q);
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}
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void
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check_various (void)
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{
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mpf_t got;
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mpq_t q;
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mpf_init (got);
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mpq_init (q);
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/* 1/1 == 1 */
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mpf_set_prec (got, 20L);
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mpq_set_ui (q, 1L, 1L);
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mpf_set_q (got, q);
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MPF_CHECK_FORMAT (got);
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ASSERT_ALWAYS (mpf_cmp_ui (got, 1L) == 0);
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/* 1/(2^n+1), a case where truncating the divisor would be wrong */
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mpf_set_prec (got, 500L);
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mpq_set_ui (q, 1L, 1L);
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mpz_mul_2exp (mpq_denref(q), mpq_denref(q), 800L);
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mpz_add_ui (mpq_denref(q), mpq_denref(q), 1L);
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check_one (got, q);
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mpf_clear (got);
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mpq_clear (q);
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}
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int
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main (void)
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{
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tests_start ();
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check_various ();
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check_rand ();
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tests_end ();
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exit (0);
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}
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