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Annotation of OpenXM_contrib/gmp/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: }