t-powm.c
上传用户:qaz666999
上传日期:2022-08-06
资源大小:2570k
文件大小:4k
- /* Test mpz_powm, mpz_mul, mpz_mod, mpz_mod_ui, mpz_div_ui.
- Copyright 1991, 1993, 1994, 1996, 1999, 2000, 2001, 2009 Free Software
- Foundation, Inc.
- This file is part of the GNU MP Library.
- The GNU MP Library is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 3 of the License, or (at your
- option) any later version.
- The GNU MP Library is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
- #include <stdio.h>
- #include <stdlib.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- #include "tests.h"
- void debug_mp __GMP_PROTO ((mpz_t, int));
- int
- main (int argc, char **argv)
- {
- mpz_t base, exp, mod;
- mpz_t r1, r2, t1, exp2, base2;
- mp_size_t base_size, exp_size, mod_size;
- int i;
- int reps = 1000;
- gmp_randstate_ptr rands;
- mpz_t bs;
- unsigned long bsi, size_range;
- tests_start ();
- TESTS_REPS (reps, argv, argc);
- rands = RANDS;
- mpz_init (bs);
- mpz_init (base);
- mpz_init (exp);
- mpz_init (mod);
- mpz_init (r1);
- mpz_init (r2);
- mpz_init (t1);
- mpz_init (exp2);
- mpz_init (base2);
- for (i = 0; i < reps; i++)
- {
- mpz_urandomb (bs, rands, 32);
- size_range = mpz_get_ui (bs) % 13 + 2;
- do /* Loop until mathematically well-defined. */
- {
- mpz_urandomb (bs, rands, size_range);
- base_size = mpz_get_ui (bs);
- mpz_rrandomb (base, rands, base_size);
- mpz_urandomb (bs, rands, 7L);
- exp_size = mpz_get_ui (bs);
- mpz_rrandomb (exp, rands, exp_size);
- }
- while (mpz_cmp_ui (base, 0) == 0 && mpz_cmp_ui (exp, 0) == 0);
- do
- {
- mpz_urandomb (bs, rands, size_range);
- mod_size = mpz_get_ui (bs);
- mpz_rrandomb (mod, rands, mod_size);
- }
- while (mpz_cmp_ui (mod, 0) == 0);
- mpz_urandomb (bs, rands, 2);
- bsi = mpz_get_ui (bs);
- if ((bsi & 1) != 0)
- mpz_neg (base, base);
- /* printf ("%ld %ld %ldn", SIZ (base), SIZ (exp), SIZ (mod)); */
- mpz_set_ui (r2, 1);
- mpz_mod (base2, base, mod);
- mpz_set (exp2, exp);
- mpz_mod (r2, r2, mod);
- for (;;)
- {
- if (mpz_tstbit (exp2, 0))
- {
- mpz_mul (r2, r2, base2);
- mpz_mod (r2, r2, mod);
- }
- if (mpz_cmp_ui (exp2, 1) <= 0)
- break;
- mpz_mul (base2, base2, base2);
- mpz_mod (base2, base2, mod);
- mpz_tdiv_q_2exp (exp2, exp2, 1);
- }
- mpz_powm (r1, base, exp, mod);
- MPZ_CHECK_FORMAT (r1);
- if (mpz_cmp (r1, r2) != 0)
- {
- fprintf (stderr, "nIncorrect results in test %d for operands:n", i);
- debug_mp (base, -16);
- debug_mp (exp, -16);
- debug_mp (mod, -16);
- fprintf (stderr, "mpz_powm result:n");
- debug_mp (r1, -16);
- fprintf (stderr, "reference result:n");
- debug_mp (r2, -16);
- abort ();
- }
- if (mpz_tdiv_ui (mod, 2) == 0)
- continue;
- mpz_powm_sec (r1, base, exp, mod);
- MPZ_CHECK_FORMAT (r1);
- if (mpz_cmp (r1, r2) != 0)
- {
- fprintf (stderr, "nIncorrect results in test %d for operands:n", i);
- debug_mp (base, -16);
- debug_mp (exp, -16);
- debug_mp (mod, -16);
- fprintf (stderr, "mpz_powm_sec result:n");
- debug_mp (r1, -16);
- fprintf (stderr, "reference result:n");
- debug_mp (r2, -16);
- abort ();
- }
- }
- mpz_clear (bs);
- mpz_clear (base);
- mpz_clear (exp);
- mpz_clear (mod);
- mpz_clear (r1);
- mpz_clear (r2);
- mpz_clear (t1);
- mpz_clear (exp2);
- mpz_clear (base2);
- tests_end ();
- exit (0);
- }
- void
- debug_mp (mpz_t x, int base)
- {
- mpz_out_str (stderr, base, x); fputc ('n', stderr);
- }