150 lines
4.1 KiB
C
150 lines
4.1 KiB
C
/* Test mpz_abs, mpz_add, mpz_cmp, mpz_cmp_ui, mpz_fdiv_qr, mpz_fdiv_q,
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mpz_fdiv_r, mpz_mul.
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Copyright 1993, 1994, 1996, 2000, 2001 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 dump_abort _PROTO ((mpz_t, mpz_t));
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void debug_mp _PROTO ((mpz_t, int));
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int
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main (int argc, char **argv)
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{
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mpz_t dividend, divisor;
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mpz_t quotient, remainder;
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mpz_t quotient2, remainder2;
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mpz_t temp;
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mp_size_t dividend_size, divisor_size;
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int i;
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int reps = 200;
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gmp_randstate_ptr rands;
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mpz_t bs;
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unsigned long bsi, size_range;
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tests_start ();
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rands = RANDS;
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mpz_init (bs);
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if (argc == 2)
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reps = atoi (argv[1]);
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mpz_init (dividend);
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mpz_init (divisor);
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mpz_init (quotient);
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mpz_init (remainder);
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mpz_init (quotient2);
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mpz_init (remainder2);
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mpz_init (temp);
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for (i = 0; i < reps; i++)
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{
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mpz_urandomb (bs, rands, 32);
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size_range = mpz_get_ui (bs) % 16 + 2; /* 0..131071 bit operands */
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do
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{
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mpz_urandomb (bs, rands, size_range);
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divisor_size = mpz_get_ui (bs);
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mpz_rrandomb (divisor, rands, divisor_size);
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}
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while (mpz_sgn (divisor) == 0);
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mpz_urandomb (bs, rands, size_range);
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dividend_size = mpz_get_ui (bs) + divisor_size;
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mpz_rrandomb (dividend, rands, dividend_size);
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mpz_urandomb (bs, rands, 2);
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bsi = mpz_get_ui (bs);
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if ((bsi & 1) != 0)
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mpz_neg (dividend, dividend);
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if ((bsi & 2) != 0)
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mpz_neg (divisor, divisor);
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/* printf ("%ld %ld\n", SIZ (dividend), SIZ (divisor)); */
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mpz_fdiv_qr (quotient, remainder, dividend, divisor);
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mpz_fdiv_q (quotient2, dividend, divisor);
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mpz_fdiv_r (remainder2, dividend, divisor);
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/* First determine that the quotients and remainders computed
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with different functions are equal. */
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if (mpz_cmp (quotient, quotient2) != 0)
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dump_abort (dividend, divisor);
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if (mpz_cmp (remainder, remainder2) != 0)
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dump_abort (dividend, divisor);
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/* Check if the sign of the quotient is correct. */
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if (mpz_cmp_ui (quotient, 0) != 0)
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if ((mpz_cmp_ui (quotient, 0) < 0)
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!= ((mpz_cmp_ui (dividend, 0) ^ mpz_cmp_ui (divisor, 0)) < 0))
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dump_abort (dividend, divisor);
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/* Check if the remainder has the same sign as the divisor
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(quotient rounded towards minus infinity). */
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if (mpz_cmp_ui (remainder, 0) != 0)
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if ((mpz_cmp_ui (remainder, 0) < 0) != (mpz_cmp_ui (divisor, 0) < 0))
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dump_abort (dividend, divisor);
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mpz_mul (temp, quotient, divisor);
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mpz_add (temp, temp, remainder);
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if (mpz_cmp (temp, dividend) != 0)
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dump_abort (dividend, divisor);
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mpz_abs (temp, divisor);
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mpz_abs (remainder, remainder);
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if (mpz_cmp (remainder, temp) >= 0)
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dump_abort (dividend, divisor);
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}
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mpz_clear (bs);
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mpz_clear (dividend);
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mpz_clear (divisor);
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mpz_clear (quotient);
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mpz_clear (remainder);
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mpz_clear (quotient2);
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mpz_clear (remainder2);
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mpz_clear (temp);
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tests_end ();
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exit (0);
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}
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void
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dump_abort (mpz_t dividend, mpz_t divisor)
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{
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fprintf (stderr, "ERROR\n");
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fprintf (stderr, "dividend = "); debug_mp (dividend, -16);
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fprintf (stderr, "divisor = "); debug_mp (divisor, -16);
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abort();
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}
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void
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debug_mp (mpz_t x, int base)
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{
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mpz_out_str (stderr, base, x); fputc ('\n', stderr);
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}
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