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Annotation of OpenXM_contrib/gmp/mpz/tests/t-gcd2.c, Revision 1.1.1.1

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 128
                     32: #endif
                     33:
                     34: main (argc, argv)
                     35:      int argc;
                     36:      char **argv;
                     37: {
                     38:   mpz_t op1, op2, x;
                     39:   mpz_t refgcd, gcd, s, t;
                     40:   mpz_t temp1, temp2;
                     41:   mp_size_t op1_size, op2_size, x_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 (x);
                     51:   mpz_init (refgcd);
                     52:   mpz_init (gcd);
                     53:   mpz_init (temp1);
                     54:   mpz_init (temp2);
                     55:   mpz_init (s);
                     56:   mpz_init (t);
                     57:
                     58:   for (i = 0; i < reps; i++)
                     59:     {
                     60:       op1_size = urandom () % SIZE - SIZE/2;
                     61:       op2_size = urandom () % SIZE - SIZE/2;
                     62:       x_size = urandom () % SIZE/2;
                     63:
                     64:       mpz_random2 (op1, op1_size);
                     65:       mpz_random2 (op2, op2_size);
                     66:       mpz_random2 (x, x_size);
                     67:       mpz_mul (op1, op1, x);
                     68:       mpz_mul (op2, op2, x);
                     69:
                     70:       mpz_refgcd (refgcd, op1, op2);
                     71:
                     72:       mpz_gcd (gcd, op1, op2);
                     73:       if (mpz_cmp (refgcd, gcd))
                     74:        dump_abort (op1, op2);
                     75:
                     76:       mpz_gcdext (gcd, s, t, op1, op2);
                     77:       if (mpz_cmp (refgcd, gcd))
                     78:        dump_abort (op1, op2);
                     79:
                     80:       mpz_mul (temp1, s, op1);
                     81:       mpz_mul (temp2, t, op2);
                     82:       mpz_add (gcd, temp1, temp2);
                     83:       if (mpz_cmp (refgcd, gcd))
                     84:        dump_abort (op1, op2);
                     85:     }
                     86:
                     87:   exit (0);
                     88: }
                     89:
                     90: void
                     91: mpz_refgcd (g, x, y)
                     92:      mpz_t g;
                     93:      mpz_t x, y;
                     94: {
                     95:   mpz_t xx, yy;
                     96:
                     97:   mpz_init (xx);
                     98:   mpz_init (yy);
                     99:
                    100:   mpz_abs (xx, x);
                    101:   mpz_abs (yy, y);
                    102:
                    103:   for (;;)
                    104:     {
                    105:       if (mpz_cmp_ui (yy, 0) == 0)
                    106:        {
                    107:          mpz_set (g, xx);
                    108:          break;
                    109:        }
                    110:       mpz_tdiv_r (xx, xx, yy);
                    111:       if (mpz_cmp_ui (xx, 0) == 0)
                    112:        {
                    113:          mpz_set (g, yy);
                    114:          break;
                    115:        }
                    116:       mpz_tdiv_r (yy, yy, xx);
                    117:     }
                    118:
                    119:   mpz_clear (xx);
                    120:   mpz_clear (yy);
                    121: }
                    122:
                    123: dump_abort (op1, op2)
                    124:      mpz_t op1, op2;
                    125: {
                    126:   fprintf (stderr, "ERROR\n");
                    127:   fprintf (stderr, "op1 = "); debug_mp (op1, -16);
                    128:   fprintf (stderr, "op2 = "); debug_mp (op2, -16);
                    129:   abort();
                    130: }
                    131:
                    132: void
                    133: debug_mp (x, base)
                    134:      mpz_t x;
                    135: {
                    136:   mpz_out_str (stderr, base, x); fputc ('\n', stderr);
                    137: }