Annotation of OpenXM_contrib/gmp/mpz/tests/t-fdiv.c, Revision 1.1
1.1 ! maekawa 1: /* Test mpz_abs, mpz_add, mpz_cmp, mpz_cmp_ui, mpz_fdiv_qr, mpz_fdiv_q,
! 2: mpz_fdiv_r, mpz_mul.
! 3:
! 4: Copyright (C) 1993, 1994, 1996 Free Software Foundation, Inc.
! 5:
! 6: This file is part of the GNU MP Library.
! 7:
! 8: The GNU MP Library is free software; you can redistribute it and/or modify
! 9: it under the terms of the GNU Library General Public License as published by
! 10: the Free Software Foundation; either version 2 of the License, or (at your
! 11: option) any later version.
! 12:
! 13: The GNU MP Library is distributed in the hope that it will be useful, but
! 14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 15: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
! 16: License for more details.
! 17:
! 18: You should have received a copy of the GNU Library General Public License
! 19: along with the GNU MP Library; see the file COPYING.LIB. If not, write to
! 20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! 21: MA 02111-1307, USA. */
! 22:
! 23: #include <stdio.h>
! 24: #include "gmp.h"
! 25: #include "gmp-impl.h"
! 26: #include "urandom.h"
! 27:
! 28: void debug_mp ();
! 29:
! 30: #ifndef SIZE
! 31: #define SIZE 16
! 32: #endif
! 33:
! 34: main (argc, argv)
! 35: int argc;
! 36: char **argv;
! 37: {
! 38: mpz_t dividend, divisor;
! 39: mpz_t quotient, remainder;
! 40: mpz_t quotient2, remainder2;
! 41: mpz_t temp;
! 42: mp_size_t dividend_size, divisor_size;
! 43: int i;
! 44: int reps = 100000;
! 45:
! 46: if (argc == 2)
! 47: reps = atoi (argv[1]);
! 48:
! 49: mpz_init (dividend);
! 50: mpz_init (divisor);
! 51: mpz_init (quotient);
! 52: mpz_init (remainder);
! 53: mpz_init (quotient2);
! 54: mpz_init (remainder2);
! 55: mpz_init (temp);
! 56:
! 57: for (i = 0; i < reps; i++)
! 58: {
! 59: dividend_size = urandom () % SIZE - SIZE/2;
! 60: mpz_random2 (dividend, dividend_size);
! 61:
! 62: divisor_size = urandom () % SIZE - SIZE/2;
! 63: mpz_random2 (divisor, divisor_size);
! 64: if (mpz_cmp_ui (divisor, 0) == 0)
! 65: continue;
! 66:
! 67: mpz_fdiv_qr (quotient, remainder, dividend, divisor);
! 68: mpz_fdiv_q (quotient2, dividend, divisor);
! 69: mpz_fdiv_r (remainder2, dividend, divisor);
! 70:
! 71: /* First determine that the quotients and remainders computed
! 72: with different functions are equal. */
! 73: if (mpz_cmp (quotient, quotient2) != 0)
! 74: dump_abort (dividend, divisor);
! 75: if (mpz_cmp (remainder, remainder2) != 0)
! 76: dump_abort (dividend, divisor);
! 77:
! 78: /* Check if the sign of the quotient is correct. */
! 79: if (mpz_cmp_ui (quotient, 0) != 0)
! 80: if ((mpz_cmp_ui (quotient, 0) < 0)
! 81: != ((mpz_cmp_ui (dividend, 0) ^ mpz_cmp_ui (divisor, 0)) < 0))
! 82: dump_abort (dividend, divisor);
! 83:
! 84: /* Check if the remainder has the same sign as the divisor
! 85: (quotient rounded towards minus infinity). */
! 86: if (mpz_cmp_ui (remainder, 0) != 0)
! 87: if ((mpz_cmp_ui (remainder, 0) < 0) != (mpz_cmp_ui (divisor, 0) < 0))
! 88: dump_abort (dividend, divisor);
! 89:
! 90: mpz_mul (temp, quotient, divisor);
! 91: mpz_add (temp, temp, remainder);
! 92: if (mpz_cmp (temp, dividend) != 0)
! 93: dump_abort (dividend, divisor);
! 94:
! 95: mpz_abs (temp, divisor);
! 96: mpz_abs (remainder, remainder);
! 97: if (mpz_cmp (remainder, temp) >= 0)
! 98: dump_abort (dividend, divisor);
! 99: }
! 100:
! 101: exit (0);
! 102: }
! 103:
! 104: dump_abort (dividend, divisor)
! 105: mpz_t dividend, divisor;
! 106: {
! 107: fprintf (stderr, "ERROR\n");
! 108: fprintf (stderr, "dividend = "); debug_mp (dividend, -16);
! 109: fprintf (stderr, "divisor = "); debug_mp (divisor, -16);
! 110: abort();
! 111: }
! 112:
! 113: void
! 114: debug_mp (x, base)
! 115: mpz_t x;
! 116: {
! 117: mpz_out_str (stderr, base, x); fputc ('\n', stderr);
! 118: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>