121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/* Test mpz_abs, mpz_add, mpz_cmp, mpz_cmp_ui, mpz_div, mpz_divmod, mpz_mod,
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mpz_mul.
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Copyright (C) 1991, 1993 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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The GNU MP Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with the GNU MP Library; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "urandom.h"
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void debug_mp ();
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#ifndef SIZE
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#define SIZE 8
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#endif
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main (argc, argv)
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int argc;
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char **argv;
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{
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MP_INT dividend, divisor;
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MP_INT quotient, remainder;
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MP_INT quotient2, remainder2;
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MP_INT temp;
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mp_size dividend_size, divisor_size;
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int i;
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int reps = 100000;
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if (argc == 2)
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reps = atoi (argv[1]);
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mpz_init (÷nd);
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mpz_init (&divisor);
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mpz_init ("ient);
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mpz_init (&remainder);
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mpz_init ("ient2);
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mpz_init (&remainder2);
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mpz_init (&temp);
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for (i = 0; i < reps; i++)
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{
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base_size = urandom () % SIZE - SIZE/2;
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mpz_random2 (&base, base_size);
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divisor_size = urandom () % SIZE - SIZE/2;
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mpz_random2 (&divisor, divisor_size);
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if (mpz_cmp_ui (&divisor, 0) == 0)
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continue;
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exp_size = urandom () % SIZE/2;
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mpz_random2 (&exp, exp_size);
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mpz_powm (&result1, &base, &exp, &divisor);
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mpz_div ("ient2, ÷nd, &divisor);
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mpz_mod (&remainder2, ÷nd, &divisor);
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/* First determine that the quotients and remainders computed
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with different functions are equal. */
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if (mpz_cmp ("ient, "ient2) != 0)
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dump_abort (÷nd, &divisor);
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if (mpz_cmp (&remainder, &remainder2) != 0)
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dump_abort (÷nd, &divisor);
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/* Check if the sign of the quotient is correct. */
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if (mpz_cmp_ui ("ient, 0) != 0)
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if ((mpz_cmp_ui ("ient, 0) < 0)
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!= ((mpz_cmp_ui (÷nd, 0) ^ mpz_cmp_ui (&divisor, 0)) < 0))
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dump_abort (÷nd, &divisor);
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/* Check if the remainder has the same sign as the dividend
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(quotient rounded towards 0). */
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if (mpz_cmp_ui (&remainder, 0) != 0)
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if ((mpz_cmp_ui (&remainder, 0) < 0) != (mpz_cmp_ui (÷nd, 0) < 0))
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dump_abort (÷nd, &divisor);
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mpz_mul (&temp, "ient, &divisor);
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mpz_add (&temp, &temp, &remainder);
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if (mpz_cmp (&temp, ÷nd) != 0)
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dump_abort (÷nd, &divisor);
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mpz_abs (&temp, &divisor);
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mpz_abs (&remainder, &remainder);
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if (mpz_cmp (&remainder, &temp) >= 0)
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dump_abort (÷nd, &divisor);
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}
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exit (0);
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}
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dump_abort (dividend, divisor)
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MP_INT *dividend, *divisor;
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{
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fprintf (stderr, "ERROR\n");
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fprintf (stderr, "dividend = "); debug_mp (dividend, -16);
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fprintf (stderr, "divisor = "); debug_mp (divisor, -16);
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abort();
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}
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void
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debug_mp (x, base)
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MP_INT *x;
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{
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mpz_out_str (stderr, base, x); fputc ('\n', stderr);
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}
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