1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
#include <stdlib.h>
#include <stdio.h>
#include "utils.h"
static void
make_random_region (pixman_region32_t *region)
{
int n_boxes;
pixman_region32_init (region);
n_boxes = prng_rand_n (64);
while (n_boxes--)
{
int32_t x, y;
uint32_t w, h;
x = (int32_t)prng_rand() >> 2;
y = (int32_t)prng_rand() >> 2;
w = prng_rand() >> 2;
h = prng_rand() >> 2;
pixman_region32_union_rect (region, region, x, y, w, h);
}
}
static void
print_box (pixman_box32_t *box)
{
printf (" %d %d %d %d\n", box->x1, box->y1, box->x2, box->y2);
}
static int32_t
random_coord (pixman_region32_t *region, pixman_bool_t x)
{
pixman_box32_t *b, *bb;
int n_boxes;
int begin, end;
if (prng_rand_n (14))
{
bb = pixman_region32_rectangles (region, &n_boxes);
if (n_boxes == 0)
goto use_extent;
b = bb + prng_rand_n (n_boxes);
}
else
{
use_extent:
b = pixman_region32_extents (region);
n_boxes = 1;
}
if (x)
{
begin = b->x1;
end = b->x2;
}
else
{
begin = b->y1;
end = b->y2;
}
switch (prng_rand_n (5))
{
case 0:
return begin - prng_rand();
case 1:
return end + prng_rand ();
case 2:
return end;
case 3:
return begin;
default:
return (end - begin) / 2 + begin;
}
return 0;
}
static uint32_t
compute_crc32_u32 (uint32_t crc32, uint32_t v)
{
if (!is_little_endian())
{
v = ((v & 0xff000000) >> 24) |
((v & 0x00ff0000) >> 8) |
((v & 0x0000ff00) << 8) |
((v & 0x000000ff) << 24);
}
return compute_crc32 (crc32, &v, sizeof (int32_t));
}
static uint32_t
crc32_box32 (uint32_t crc32, pixman_box32_t *box)
{
crc32 = compute_crc32_u32 (crc32, box->x1);
crc32 = compute_crc32_u32 (crc32, box->y1);
crc32 = compute_crc32_u32 (crc32, box->x2);
crc32 = compute_crc32_u32 (crc32, box->y2);
return crc32;
}
static uint32_t
test_region_contains_rectangle (int i, int verbose)
{
pixman_box32_t box;
pixman_box32_t rbox = { 0, 0, 0, 0 };
pixman_region32_t region;
uint32_t r, r1, r2, r3, r4, crc32;
prng_srand (i);
make_random_region (®ion);
box.x1 = random_coord (®ion, TRUE);
box.x2 = box.x1 + prng_rand ();
box.y1 = random_coord (®ion, FALSE);
box.y2 = box.y1 + prng_rand ();
if (verbose)
{
int n_rects;
pixman_box32_t *boxes;
boxes = pixman_region32_rectangles (®ion, &n_rects);
printf ("region:\n");
while (n_rects--)
print_box (boxes++);
printf ("box:\n");
print_box (&box);
}
crc32 = 0;
r1 = pixman_region32_contains_point (®ion, box.x1, box.y1, &rbox);
crc32 = crc32_box32 (crc32, &rbox);
r2 = pixman_region32_contains_point (®ion, box.x1, box.y2, &rbox);
crc32 = crc32_box32 (crc32, &rbox);
r3 = pixman_region32_contains_point (®ion, box.x2, box.y1, &rbox);
crc32 = crc32_box32 (crc32, &rbox);
r4 = pixman_region32_contains_point (®ion, box.x2, box.y2, &rbox);
crc32 = crc32_box32 (crc32, &rbox);
r = pixman_region32_contains_rectangle (®ion, &box);
r = (i << 8) | (r << 4) | (r1 << 3) | (r2 << 2) | (r3 << 1) | (r4 << 0);
crc32 = compute_crc32_u32 (crc32, r);
if (verbose)
printf ("results: %d %d %d %d %d\n", (r & 0xf0) >> 4, r1, r2, r3, r4);
pixman_region32_fini (®ion);
return crc32;
}
int
main (int argc, const char *argv[])
{
return fuzzer_test_main ("region_contains",
1000000,
0x548E0F3F,
test_region_contains_rectangle,
argc, argv);
}
|
