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Annotation of OpenXM_contrib/gmp/tests/mpz/t-fdiv.c, Revision 1.1

1.1     ! ohara       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 1993, 1994, 1996, 2000, 2001 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 ((mpz_t, mpz_t));
        !            31: void debug_mp _PROTO ((mpz_t, int));
        !            32:
        !            33: int
        !            34: main (int argc, char **argv)
        !            35: {
        !            36:   mpz_t dividend, divisor;
        !            37:   mpz_t quotient, remainder;
        !            38:   mpz_t quotient2, remainder2;
        !            39:   mpz_t temp;
        !            40:   mp_size_t dividend_size, divisor_size;
        !            41:   int i;
        !            42:   int reps = 200;
        !            43:   gmp_randstate_ptr rands;
        !            44:   mpz_t bs;
        !            45:   unsigned long bsi, size_range;
        !            46:
        !            47:   tests_start ();
        !            48:   rands = RANDS;
        !            49:
        !            50:   mpz_init (bs);
        !            51:
        !            52:   if (argc == 2)
        !            53:      reps = atoi (argv[1]);
        !            54:
        !            55:   mpz_init (dividend);
        !            56:   mpz_init (divisor);
        !            57:   mpz_init (quotient);
        !            58:   mpz_init (remainder);
        !            59:   mpz_init (quotient2);
        !            60:   mpz_init (remainder2);
        !            61:   mpz_init (temp);
        !            62:
        !            63:   for (i = 0; i < reps; i++)
        !            64:     {
        !            65:       mpz_urandomb (bs, rands, 32);
        !            66:       size_range = mpz_get_ui (bs) % 16 + 2; /* 0..131071 bit operands */
        !            67:
        !            68:       do
        !            69:        {
        !            70:          mpz_urandomb (bs, rands, size_range);
        !            71:          divisor_size = mpz_get_ui (bs);
        !            72:          mpz_rrandomb (divisor, rands, divisor_size);
        !            73:        }
        !            74:       while (mpz_sgn (divisor) == 0);
        !            75:
        !            76:       mpz_urandomb (bs, rands, size_range);
        !            77:       dividend_size = mpz_get_ui (bs) + divisor_size;
        !            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:       if ((bsi & 2) != 0)
        !            85:        mpz_neg (divisor, divisor);
        !            86:
        !            87:       /* printf ("%ld %ld\n", SIZ (dividend), SIZ (divisor)); */
        !            88:
        !            89:       mpz_fdiv_qr (quotient, remainder, dividend, divisor);
        !            90:       mpz_fdiv_q (quotient2, dividend, divisor);
        !            91:       mpz_fdiv_r (remainder2, dividend, divisor);
        !            92:
        !            93:       /* First determine that the quotients and remainders computed
        !            94:         with different functions are equal.  */
        !            95:       if (mpz_cmp (quotient, quotient2) != 0)
        !            96:        dump_abort (dividend, divisor);
        !            97:       if (mpz_cmp (remainder, remainder2) != 0)
        !            98:        dump_abort (dividend, divisor);
        !            99:
        !           100:       /* Check if the sign of the quotient is correct.  */
        !           101:       if (mpz_cmp_ui (quotient, 0) != 0)
        !           102:        if ((mpz_cmp_ui (quotient, 0) < 0)
        !           103:            != ((mpz_cmp_ui (dividend, 0) ^ mpz_cmp_ui (divisor, 0)) < 0))
        !           104:        dump_abort (dividend, divisor);
        !           105:
        !           106:       /* Check if the remainder has the same sign as the divisor
        !           107:         (quotient rounded towards minus infinity).  */
        !           108:       if (mpz_cmp_ui (remainder, 0) != 0)
        !           109:        if ((mpz_cmp_ui (remainder, 0) < 0) != (mpz_cmp_ui (divisor, 0) < 0))
        !           110:          dump_abort (dividend, divisor);
        !           111:
        !           112:       mpz_mul (temp, quotient, divisor);
        !           113:       mpz_add (temp, temp, remainder);
        !           114:       if (mpz_cmp (temp, dividend) != 0)
        !           115:        dump_abort (dividend, divisor);
        !           116:
        !           117:       mpz_abs (temp, divisor);
        !           118:       mpz_abs (remainder, remainder);
        !           119:       if (mpz_cmp (remainder, temp) >= 0)
        !           120:        dump_abort (dividend, divisor);
        !           121:     }
        !           122:
        !           123:   mpz_clear (bs);
        !           124:   mpz_clear (dividend);
        !           125:   mpz_clear (divisor);
        !           126:   mpz_clear (quotient);
        !           127:   mpz_clear (remainder);
        !           128:   mpz_clear (quotient2);
        !           129:   mpz_clear (remainder2);
        !           130:   mpz_clear (temp);
        !           131:
        !           132:   tests_end ();
        !           133:   exit (0);
        !           134: }
        !           135:
        !           136: void
        !           137: dump_abort (mpz_t dividend, mpz_t divisor)
        !           138: {
        !           139:   fprintf (stderr, "ERROR\n");
        !           140:   fprintf (stderr, "dividend = "); debug_mp (dividend, -16);
        !           141:   fprintf (stderr, "divisor  = "); debug_mp (divisor, -16);
        !           142:   abort();
        !           143: }
        !           144:
        !           145: void
        !           146: debug_mp (mpz_t x, int base)
        !           147: {
        !           148:   mpz_out_str (stderr, base, x); fputc ('\n', stderr);
        !           149: }