t-cmp.c
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上传日期:2022-08-06
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- /* Test mpz_cmp and mpz_cmpabs.
- Copyright 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"
- /* Nothing sophisticated here, just exercise some combinations of sizes and
- signs. */
- void
- check_one (mpz_ptr x, mpz_ptr y, int want_cmp, int want_cmpabs)
- {
- int got;
- got = mpz_cmp (x, y);
- if (( got < 0) != (want_cmp < 0)
- || (got == 0) != (want_cmp == 0)
- || (got > 0) != (want_cmp > 0))
- {
- printf ("mpz_cmp got %d want %dn", got, want_cmp);
- mpz_trace ("x", x);
- mpz_trace ("y", y);
- abort ();
- }
- got = mpz_cmpabs (x, y);
- if (( got < 0) != (want_cmpabs < 0)
- || (got == 0) != (want_cmpabs == 0)
- || (got > 0) != (want_cmpabs > 0))
- {
- printf ("mpz_cmpabs got %d want %dn", got, want_cmpabs);
- mpz_trace ("x", x);
- mpz_trace ("y", y);
- abort ();
- }
- }
- void
- check_all (mpz_ptr x, mpz_ptr y, int want_cmp, int want_cmpabs)
- {
- check_one (x, y, want_cmp, want_cmpabs);
- check_one (y, x, -want_cmp, -want_cmpabs);
- mpz_neg (x, x);
- mpz_neg (y, y);
- want_cmp = -want_cmp;
- check_one (x, y, want_cmp, want_cmpabs);
- check_one (y, x, -want_cmp, -want_cmpabs);
- }
- #define SET1(z,size, n)
- SIZ(z) = size; PTR(z)[0] = n
- #define SET2(z,size, n1,n0)
- SIZ(z) = size; PTR(z)[1] = n1; PTR(z)[0] = n0
- #define SET4(z,size, n3,n2,n1,n0)
- SIZ(z) = size; PTR(z)[3] = n3; PTR(z)[2] = n2; PTR(z)[1] = n1; PTR(z)[0] = n0
- void
- check_various (void)
- {
- mpz_t x, y;
- mpz_init (x);
- mpz_init (y);
- mpz_realloc (x, (mp_size_t) 20);
- mpz_realloc (y, (mp_size_t) 20);
- /* 0 cmp 0, junk in low limbs */
- SET1 (x,0, 123);
- SET1 (y,0, 456);
- check_all (x, y, 0, 0);
- /* 123 cmp 0 */
- SET1 (x,1, 123);
- SET1 (y,0, 456);
- check_all (x, y, 1, 1);
- /* 123:456 cmp 0 */
- SET2 (x,2, 456,123);
- SET1 (y,0, 9999);
- check_all (x, y, 1, 1);
- /* 123 cmp 123 */
- SET1(x,1, 123);
- SET1(y,1, 123);
- check_all (x, y, 0, 0);
- /* -123 cmp 123 */
- SET1(x,-1, 123);
- SET1(y,1, 123);
- check_all (x, y, -1, 0);
- /* 123 cmp 456 */
- SET1(x,1, 123);
- SET1(y,1, 456);
- check_all (x, y, -1, -1);
- /* -123 cmp 456 */
- SET1(x,-1, 123);
- SET1(y,1, 456);
- check_all (x, y, -1, -1);
- /* 123 cmp -456 */
- SET1(x,1, 123);
- SET1(y,-1, 456);
- check_all (x, y, 1, -1);
- /* 1:0 cmp 1:0 */
- SET2 (x,2, 1,0);
- SET2 (y,2, 1,0);
- check_all (x, y, 0, 0);
- /* -1:0 cmp 1:0 */
- SET2 (x,-2, 1,0);
- SET2 (y,2, 1,0);
- check_all (x, y, -1, 0);
- /* 2:0 cmp 1:0 */
- SET2 (x,2, 2,0);
- SET2 (y,2, 1,0);
- check_all (x, y, 1, 1);
- /* 4:3:2:1 cmp 2:1 */
- SET4 (x,4, 4,3,2,1);
- SET2 (y,2, 2,1);
- check_all (x, y, 1, 1);
- /* -4:3:2:1 cmp 2:1 */
- SET4 (x,-4, 4,3,2,1);
- SET2 (y,2, 2,1);
- check_all (x, y, -1, 1);
- mpz_clear (x);
- mpz_clear (y);
- }
- int
- main (void)
- {
- tests_start ();
- mp_trace_base = -16;
- check_various ();
- tests_end ();
- exit (0);
- }