Annotation of OpenXM/src/kan96xx/gmp-2.0.2/mpz/tests/t-gcd.c, Revision 1.1
1.1 ! maekawa 1: /* Test mpz_gcd, mpz_gcdext, mpz_mul, mpz_tdiv_r, mpz_add, mpz_cmp,
! 2: mpz_cmp_ui, mpz_init_set, mpz_set, mpz_clear.
! 3:
! 4: Copyright (C) 1991, 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 mpz_refgcd (), debug_mp ();
! 29:
! 30: #ifndef SIZE
! 31: #define SIZE 256 /* really needs to be this large to exercise corner cases! */
! 32: #endif
! 33:
! 34: main (argc, argv)
! 35: int argc;
! 36: char **argv;
! 37: {
! 38: mpz_t op1, op2;
! 39: mpz_t refgcd, gcd, s, t;
! 40: mpz_t temp1, temp2;
! 41: mp_size_t op1_size, op2_size;
! 42: int i;
! 43: int reps = 1000;
! 44:
! 45: if (argc == 2)
! 46: reps = atoi (argv[1]);
! 47:
! 48: mpz_init (op1);
! 49: mpz_init (op2);
! 50: mpz_init (refgcd);
! 51: mpz_init (gcd);
! 52: mpz_init (temp1);
! 53: mpz_init (temp2);
! 54: mpz_init (s);
! 55: mpz_init (t);
! 56:
! 57: for (i = 0; i < reps; i++)
! 58: {
! 59: op1_size = urandom () % SIZE - SIZE/2;
! 60: op2_size = urandom () % SIZE - SIZE/2;
! 61:
! 62: mpz_random2 (op1, op1_size);
! 63: mpz_random2 (op2, op2_size);
! 64:
! 65: mpz_refgcd (refgcd, op1, op2);
! 66:
! 67: mpz_gcd (gcd, op1, op2);
! 68: if (mpz_cmp (refgcd, gcd))
! 69: dump_abort (op1, op2);
! 70:
! 71: mpz_gcdext (gcd, s, t, op1, op2);
! 72: if (mpz_cmp (refgcd, gcd))
! 73: dump_abort (op1, op2);
! 74:
! 75: mpz_mul (temp1, s, op1);
! 76: mpz_mul (temp2, t, op2);
! 77: mpz_add (gcd, temp1, temp2);
! 78: if (mpz_cmp (refgcd, gcd))
! 79: dump_abort (op1, op2);
! 80: }
! 81:
! 82: exit (0);
! 83: }
! 84:
! 85: void
! 86: mpz_refgcd (g, x, y)
! 87: mpz_t g;
! 88: mpz_t x, y;
! 89: {
! 90: mpz_t xx, yy;
! 91:
! 92: mpz_init (xx);
! 93: mpz_init (yy);
! 94:
! 95: mpz_abs (xx, x);
! 96: mpz_abs (yy, y);
! 97:
! 98: for (;;)
! 99: {
! 100: if (mpz_cmp_ui (yy, 0) == 0)
! 101: {
! 102: mpz_set (g, xx);
! 103: break;
! 104: }
! 105: mpz_tdiv_r (xx, xx, yy);
! 106: if (mpz_cmp_ui (xx, 0) == 0)
! 107: {
! 108: mpz_set (g, yy);
! 109: break;
! 110: }
! 111: mpz_tdiv_r (yy, yy, xx);
! 112: }
! 113:
! 114: mpz_clear (xx);
! 115: mpz_clear (yy);
! 116: }
! 117:
! 118: dump_abort (op1, op2)
! 119: mpz_t op1, op2;
! 120: {
! 121: fprintf (stderr, "ERROR\n");
! 122: fprintf (stderr, "op1 = "); debug_mp (op1, -16);
! 123: fprintf (stderr, "op2 = "); debug_mp (op2, -16);
! 124: abort();
! 125: }
! 126:
! 127: void
! 128: debug_mp (x, base)
! 129: mpz_t x;
! 130: {
! 131: mpz_out_str (stderr, base, x); fputc ('\n', stderr);
! 132: }
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