| /* Test mpz_abs, mpz_add, mpz_cmp, mpz_cmp_ui, mpz_tdiv_qr, mpz_tdiv_q, |
| mpz_tdiv_r, mpz_mul. |
| |
| Copyright 1991, 1993, 1994, 1996, 1997, 2000, 2001 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 dump_abort __GMP_PROTO ((mpz_t, mpz_t)); |
| void debug_mp __GMP_PROTO ((mpz_t, int)); |
| |
| int |
| main (int argc, char **argv) |
| { |
| mpz_t dividend, divisor; |
| mpz_t quotient, remainder; |
| mpz_t quotient2, remainder2; |
| mpz_t temp; |
| mp_size_t dividend_size, divisor_size; |
| int i; |
| int reps = 1000; |
| gmp_randstate_ptr rands; |
| mpz_t bs; |
| unsigned long bsi, size_range; |
| |
| tests_start (); |
| rands = RANDS; |
| |
| mpz_init (bs); |
| |
| if (argc == 2) |
| reps = atoi (argv[1]); |
| |
| mpz_init (dividend); |
| mpz_init (divisor); |
| mpz_init (quotient); |
| mpz_init (remainder); |
| mpz_init (quotient2); |
| mpz_init (remainder2); |
| mpz_init (temp); |
| |
| for (i = 0; i < reps; i++) |
| { |
| mpz_urandomb (bs, rands, 32); |
| size_range = mpz_get_ui (bs) % 16 + 2; /* 0..131071 bit operands */ |
| |
| do |
| { |
| mpz_urandomb (bs, rands, size_range); |
| divisor_size = mpz_get_ui (bs); |
| mpz_rrandomb (divisor, rands, divisor_size); |
| } |
| while (mpz_sgn (divisor) == 0); |
| |
| mpz_urandomb (bs, rands, size_range); |
| dividend_size = mpz_get_ui (bs) + divisor_size; |
| mpz_rrandomb (dividend, rands, dividend_size); |
| |
| mpz_urandomb (bs, rands, 2); |
| bsi = mpz_get_ui (bs); |
| if ((bsi & 1) != 0) |
| mpz_neg (dividend, dividend); |
| if ((bsi & 2) != 0) |
| mpz_neg (divisor, divisor); |
| |
| /* printf ("%ld %ld\n", SIZ (dividend), SIZ (divisor)); */ |
| |
| mpz_tdiv_qr (quotient, remainder, dividend, divisor); |
| mpz_tdiv_q (quotient2, dividend, divisor); |
| mpz_tdiv_r (remainder2, dividend, divisor); |
| |
| /* First determine that the quotients and remainders computed |
| with different functions are equal. */ |
| if (mpz_cmp (quotient, quotient2) != 0) |
| dump_abort (dividend, divisor); |
| if (mpz_cmp (remainder, remainder2) != 0) |
| dump_abort (dividend, divisor); |
| |
| /* Check if the sign of the quotient is correct. */ |
| if (mpz_cmp_ui (quotient, 0) != 0) |
| if ((mpz_cmp_ui (quotient, 0) < 0) |
| != ((mpz_cmp_ui (dividend, 0) ^ mpz_cmp_ui (divisor, 0)) < 0)) |
| dump_abort (dividend, divisor); |
| |
| /* Check if the remainder has the same sign as the dividend |
| (quotient rounded towards 0). */ |
| if (mpz_cmp_ui (remainder, 0) != 0) |
| if ((mpz_cmp_ui (remainder, 0) < 0) != (mpz_cmp_ui (dividend, 0) < 0)) |
| dump_abort (dividend, divisor); |
| |
| mpz_mul (temp, quotient, divisor); |
| mpz_add (temp, temp, remainder); |
| if (mpz_cmp (temp, dividend) != 0) |
| dump_abort (dividend, divisor); |
| |
| mpz_abs (temp, divisor); |
| mpz_abs (remainder, remainder); |
| if (mpz_cmp (remainder, temp) >= 0) |
| dump_abort (dividend, divisor); |
| } |
| |
| mpz_clear (bs); |
| mpz_clear (dividend); |
| mpz_clear (divisor); |
| mpz_clear (quotient); |
| mpz_clear (remainder); |
| mpz_clear (quotient2); |
| mpz_clear (remainder2); |
| mpz_clear (temp); |
| |
| tests_end (); |
| exit (0); |
| } |
| |
| void |
| dump_abort (mpz_t dividend, mpz_t divisor) |
| { |
| fprintf (stderr, "ERROR\n"); |
| fprintf (stderr, "dividend = "); debug_mp (dividend, -16); |
| fprintf (stderr, "divisor = "); debug_mp (divisor, -16); |
| abort(); |
| } |
| |
| void |
| debug_mp (mpz_t x, int base) |
| { |
| mpz_out_str (stderr, base, x); fputc ('\n', stderr); |
| } |