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
|
typedef char padding[16];
struct {
padding p1;
char v;
padding p2;
} padding_char;
struct {
padding p1;
short v;
padding p2;
} padding_short;
struct {
padding p1;
int v;
padding p2;
} padding_int;
struct {
padding p1;
long v;
padding p2;
} padding_long;
struct {
padding p1;
long long v;
padding p2;
} padding_long_long;
struct {
padding p1;
float v;
padding p2;
} padding_float;
struct {
padding p1;
double v;
padding p2;
} padding_double;
struct {
padding p1;
long double v;
padding p2;
} padding_long_double;
static void
fill (void *buf, long sizeof_buf)
{
char *p = buf;
int i;
for (i = 0; i < sizeof_buf; i++)
p[i] = "The quick brown dingo jumped over the layzy dog."[i];
}
void
fill_structs (void)
{
fill (&padding_char.p1, sizeof (padding));
fill (&padding_char.v, sizeof (padding_char.v));
fill (&padding_char.p2, sizeof (padding));
fill (&padding_short.p1, sizeof (padding));
fill (&padding_short.v, sizeof (padding_short.v));
fill (&padding_short.p2, sizeof (padding));
fill (&padding_int.p1, sizeof (padding));
fill (&padding_int.v, sizeof (padding_int.v));
fill (&padding_int.p2, sizeof (padding));
fill (&padding_long.p1, sizeof (padding));
fill (&padding_long.v, sizeof (padding_long.v));
fill (&padding_long.p2, sizeof (padding));
fill (&padding_long_long.p1, sizeof (padding));
fill (&padding_long_long.v, sizeof (padding_long_long.v));
fill (&padding_long_long.p2, sizeof (padding));
fill (&padding_float.p1, sizeof (padding));
fill (&padding_float.v, sizeof (padding_float.v));
fill (&padding_float.p2, sizeof (padding));
fill (&padding_double.p1, sizeof (padding));
fill (&padding_double.v, sizeof (padding_double.v));
fill (&padding_double.p2, sizeof (padding));
fill (&padding_long_double.p1, sizeof (padding));
fill (&padding_long_double.v, sizeof (padding_long_double.v));
fill (&padding_long_double.p2, sizeof (padding));
}
int
main ()
{
int size, value;
fill_structs ();
size = (int) sizeof (char);
size = (int) sizeof (short);
size = (int) sizeof (int);
size = (int) sizeof (long);
size = (int) sizeof (long long);
size = (int) sizeof (void*);
size = (int) sizeof (void (*)(void));
size = (int) sizeof (float);
size = (int) sizeof (double);
size = (int) sizeof (long double);
/* Signed char? */
value = '\377';
value = (int) (char) -1;
value = (int) (signed char) -1;
value = (int) (unsigned char) -1;
return 0;
}
|
GitWeb