1/* Test mpz_cmp and mpz_cmpabs.
2
3Copyright 2001 Free Software Foundation, Inc.
4
5This file is part of the GNU MP Library.
6
7The GNU MP Library is free software; you can redistribute it and/or modify
8it under the terms of the GNU Lesser General Public License as published by
9the Free Software Foundation; either version 3 of the License, or (at your
10option) any later version.
11
12The GNU MP Library is distributed in the hope that it will be useful, but
13WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
15License for more details.
16
17You should have received a copy of the GNU Lesser General Public License
18along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
19
20#include <stdio.h>
21#include <stdlib.h>
22#include "gmp.h"
23#include "gmp-impl.h"
24#include "tests.h"
25
26
27/* Nothing sophisticated here, just exercise some combinations of sizes and
28   signs.  */
29
30
31void
32check_one (mpz_ptr x, mpz_ptr y, int want_cmp, int want_cmpabs)
33{
34  int  got;
35
36  got = mpz_cmp (x, y);
37  if ((   got <  0) != (want_cmp <  0)
38      || (got == 0) != (want_cmp == 0)
39      || (got >  0) != (want_cmp >  0))
40    {
41      printf ("mpz_cmp got %d want %d\n", got, want_cmp);
42      mpz_trace ("x", x);
43      mpz_trace ("y", y);
44      abort ();
45    }
46
47  got = mpz_cmpabs (x, y);
48  if ((   got <  0) != (want_cmpabs <  0)
49      || (got == 0) != (want_cmpabs == 0)
50      || (got >  0) != (want_cmpabs >  0))
51    {
52      printf ("mpz_cmpabs got %d want %d\n", got, want_cmpabs);
53      mpz_trace ("x", x);
54      mpz_trace ("y", y);
55      abort ();
56    }
57}
58
59
60void
61check_all (mpz_ptr x, mpz_ptr y, int want_cmp, int want_cmpabs)
62{
63  check_one (x, y,  want_cmp,  want_cmpabs);
64  check_one (y, x, -want_cmp, -want_cmpabs);
65
66  mpz_neg (x, x);
67  mpz_neg (y, y);
68  want_cmp = -want_cmp;
69
70  check_one (x, y,  want_cmp,  want_cmpabs);
71  check_one (y, x, -want_cmp, -want_cmpabs);
72}
73
74
75#define SET1(z,size, n) \
76  SIZ(z) = size; PTR(z)[0] = n
77
78#define SET2(z,size, n1,n0) \
79  SIZ(z) = size; PTR(z)[1] = n1; PTR(z)[0] = n0
80
81#define SET4(z,size, n3,n2,n1,n0) \
82  SIZ(z) = size; PTR(z)[3] = n3; PTR(z)[2] = n2; PTR(z)[1] = n1; PTR(z)[0] = n0
83
84void
85check_various (void)
86{
87  mpz_t  x, y;
88
89  mpz_init (x);
90  mpz_init (y);
91
92  mpz_realloc (x, (mp_size_t) 20);
93  mpz_realloc (y, (mp_size_t) 20);
94
95  /* 0 cmp 0, junk in low limbs */
96  SET1 (x,0, 123);
97  SET1 (y,0, 456);
98  check_all (x, y, 0, 0);
99
100
101  /* 123 cmp 0 */
102  SET1 (x,1, 123);
103  SET1 (y,0, 456);
104  check_all (x, y, 1, 1);
105
106  /* 123:456 cmp 0 */
107  SET2 (x,2, 456,123);
108  SET1 (y,0, 9999);
109  check_all (x, y, 1, 1);
110
111
112  /* 123 cmp 123 */
113  SET1(x,1, 123);
114  SET1(y,1, 123);
115  check_all (x, y, 0, 0);
116
117  /* -123 cmp 123 */
118  SET1(x,-1, 123);
119  SET1(y,1,  123);
120  check_all (x, y, -1, 0);
121
122
123  /* 123 cmp 456 */
124  SET1(x,1, 123);
125  SET1(y,1, 456);
126  check_all (x, y, -1, -1);
127
128  /* -123 cmp 456 */
129  SET1(x,-1, 123);
130  SET1(y,1,  456);
131  check_all (x, y, -1, -1);
132
133  /* 123 cmp -456 */
134  SET1(x,1,  123);
135  SET1(y,-1, 456);
136  check_all (x, y, 1, -1);
137
138
139  /* 1:0 cmp 1:0 */
140  SET2 (x,2, 1,0);
141  SET2 (y,2, 1,0);
142  check_all (x, y, 0, 0);
143
144  /* -1:0 cmp 1:0 */
145  SET2 (x,-2, 1,0);
146  SET2 (y,2,  1,0);
147  check_all (x, y, -1, 0);
148
149
150  /* 2:0 cmp 1:0 */
151  SET2 (x,2, 2,0);
152  SET2 (y,2, 1,0);
153  check_all (x, y, 1, 1);
154
155
156  /* 4:3:2:1 cmp 2:1 */
157  SET4 (x,4, 4,3,2,1);
158  SET2 (y,2, 2,1);
159  check_all (x, y, 1, 1);
160
161  /* -4:3:2:1 cmp 2:1 */
162  SET4 (x,-4, 4,3,2,1);
163  SET2 (y,2,  2,1);
164  check_all (x, y, -1, 1);
165
166
167  mpz_clear (x);
168  mpz_clear (y);
169}
170
171
172int
173main (void)
174{
175  tests_start ();
176  mp_trace_base = -16;
177
178  check_various ();
179
180  tests_end ();
181  exit (0);
182}
183