Annotation of OpenXM_contrib/gmp/tests/mpz/t-cdiv_ui.c, Revision 1.1
1.1 ! ohara 1: /* Test mpz_abs, mpz_add, mpz_cmp, mpz_cmp_ui, mpz_cdiv_qr_ui, mpz_cdiv_q_ui,
! 2: mpz_cdiv_r_ui, , mpz_cdiv_ui, mpz_mul_ui.
! 3:
! 4: Copyright 1993, 1994, 1996, 2000, 2001, 2002 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 Lesser General Public License as published by
! 10: the Free Software Foundation; either version 2.1 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 Lesser General Public
! 16: License for more details.
! 17:
! 18: You should have received a copy of the GNU Lesser 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 <stdlib.h>
! 25:
! 26: #include "gmp.h"
! 27: #include "gmp-impl.h"
! 28: #include "tests.h"
! 29:
! 30: void dump_abort _PROTO ((char *, mpz_t, unsigned long));
! 31: void debug_mp _PROTO ((mpz_t, int));
! 32:
! 33: int
! 34: main (int argc, char **argv)
! 35: {
! 36: mpz_t dividend;
! 37: mpz_t quotient, remainder;
! 38: mpz_t quotient2, remainder2;
! 39: mpz_t temp;
! 40: mp_size_t dividend_size;
! 41: unsigned long divisor;
! 42: int i;
! 43: int reps = 10000;
! 44: gmp_randstate_ptr rands;
! 45: mpz_t bs;
! 46: unsigned long bsi, size_range;
! 47: unsigned long r_rq, r_q, r_r, r;
! 48:
! 49: tests_start ();
! 50: rands = RANDS;
! 51:
! 52: mpz_init (bs);
! 53:
! 54: if (argc == 2)
! 55: reps = atoi (argv[1]);
! 56:
! 57: mpz_init (dividend);
! 58: mpz_init (quotient);
! 59: mpz_init (remainder);
! 60: mpz_init (quotient2);
! 61: mpz_init (remainder2);
! 62: mpz_init (temp);
! 63:
! 64: for (i = 0; i < reps; i++)
! 65: {
! 66: mpz_urandomb (bs, rands, 32);
! 67: size_range = mpz_get_ui (bs) % 10 + 2; /* 0..2047 bit operands */
! 68:
! 69: do
! 70: {
! 71: mpz_rrandomb (bs, rands, 64);
! 72: divisor = mpz_get_ui (bs);
! 73: }
! 74: while (divisor == 0);
! 75:
! 76: mpz_urandomb (bs, rands, size_range);
! 77: dividend_size = mpz_get_ui (bs);
! 78: mpz_rrandomb (dividend, rands, dividend_size);
! 79:
! 80: mpz_urandomb (bs, rands, 2);
! 81: bsi = mpz_get_ui (bs);
! 82: if ((bsi & 1) != 0)
! 83: mpz_neg (dividend, dividend);
! 84:
! 85: /* printf ("%ld\n", SIZ (dividend)); */
! 86:
! 87: r_rq = mpz_cdiv_qr_ui (quotient, remainder, dividend, divisor);
! 88: r_q = mpz_cdiv_q_ui (quotient2, dividend, divisor);
! 89: r_r = mpz_cdiv_r_ui (remainder2, dividend, divisor);
! 90: r = mpz_cdiv_ui (dividend, divisor);
! 91:
! 92: /* First determine that the quotients and remainders computed
! 93: with different functions are equal. */
! 94: if (mpz_cmp (quotient, quotient2) != 0)
! 95: dump_abort ("quotients from mpz_cdiv_qr_ui and mpz_cdiv_q_ui differ",
! 96: dividend, divisor);
! 97: if (mpz_cmp (remainder, remainder2) != 0)
! 98: dump_abort ("remainders from mpz_cdiv_qr_ui and mpz_cdiv_r_ui differ",
! 99: dividend, divisor);
! 100:
! 101: /* Check if the sign of the quotient is correct. */
! 102: if (mpz_cmp_ui (quotient, 0) != 0)
! 103: if ((mpz_cmp_ui (quotient, 0) < 0)
! 104: != (mpz_cmp_ui (dividend, 0) < 0))
! 105: dump_abort ("quotient sign wrong", dividend, divisor);
! 106:
! 107: /* Check if the remainder has the opposite sign as the (positive) divisor
! 108: (quotient rounded towards minus infinity). */
! 109: if (mpz_cmp_ui (remainder, 0) != 0)
! 110: if (mpz_cmp_ui (remainder, 0) > 0)
! 111: dump_abort ("remainder sign wrong", dividend, divisor);
! 112:
! 113: mpz_mul_ui (temp, quotient, divisor);
! 114: mpz_add (temp, temp, remainder);
! 115: if (mpz_cmp (temp, dividend) != 0)
! 116: dump_abort ("n mod d != n - [n/d]*d", dividend, divisor);
! 117:
! 118: mpz_abs (remainder, remainder);
! 119: if (mpz_cmp_ui (remainder, divisor) >= 0)
! 120: dump_abort ("remainder greater than divisor", dividend, divisor);
! 121:
! 122: if (mpz_cmp_ui (remainder, r_rq) != 0)
! 123: dump_abort ("remainder returned from mpz_cdiv_qr_ui is wrong",
! 124: dividend, divisor);
! 125: if (mpz_cmp_ui (remainder, r_q) != 0)
! 126: dump_abort ("remainder returned from mpz_cdiv_q_ui is wrong",
! 127: dividend, divisor);
! 128: if (mpz_cmp_ui (remainder, r_r) != 0)
! 129: dump_abort ("remainder returned from mpz_cdiv_r_ui is wrong",
! 130: dividend, divisor);
! 131: if (mpz_cmp_ui (remainder, r) != 0)
! 132: dump_abort ("remainder returned from mpz_cdiv_ui is wrong",
! 133: dividend, divisor);
! 134: }
! 135:
! 136: mpz_clear (bs);
! 137: mpz_clear (dividend);
! 138: mpz_clear (quotient);
! 139: mpz_clear (remainder);
! 140: mpz_clear (quotient2);
! 141: mpz_clear (remainder2);
! 142: mpz_clear (temp);
! 143:
! 144: tests_end ();
! 145: exit (0);
! 146: }
! 147:
! 148: void
! 149: dump_abort (char *str, mpz_t dividend, unsigned long divisor)
! 150: {
! 151: fprintf (stderr, "ERROR: %s\n", str);
! 152: fprintf (stderr, "dividend = "); debug_mp (dividend, -16);
! 153: fprintf (stderr, "divisor = %lX\n", divisor);
! 154: abort();
! 155: }
! 156:
! 157: void
! 158: debug_mp (mpz_t x, int base)
! 159: {
! 160: mpz_out_str (stderr, base, x); fputc ('\n', stderr);
! 161: }
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