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
|
/* See LICENSE file for copyright and license details. */
#include "libsimple.h"
#ifndef TEST
void *
libsimple_rawmemrelem(const void *hay_, size_t hayn, const void *sub_, size_t subn)
{
switch (subn) {
case 0:
return (void *)hay_;
case 1:
{
uint8_t *hay = (void *)hay_;
uint8_t sub = *(uint8_t *)sub_;
for (hay += hayn; *--hay != sub;);
return hay;
}
case 2:
{
uint16_t *hay = (void *)hay_;
uint16_t sub = *(uint16_t *)sub_;
for (hay += hayn; *--hay != sub;);
return hay;
}
case 4:
{
uint32_t *hay = (void *)hay_;
uint32_t sub = *(uint32_t *)sub_;
for (hay += hayn; *--hay != sub;);
return hay;
}
case 8:
{
uint64_t *hay = (void *)hay_;
uint64_t sub = *(uint64_t *)sub_;
for (hay += hayn; *--hay != sub;);
return hay;
}
default:
{
char *hay = (void *)hay_;
const char *sub = sub_;
size_t i;
for (hay += hayn * subn;;) {
hay -= subn;
for (i = 0; i < subn; i++)
if (hay[i] != sub[i])
goto next;
return hay;
next:;
}
}
}
}
#else
#include "test.h"
int
main(void)
{
assert(!strcmpnul(libsimple_rawmemrelem("12345634", 8, "", 0), "12345634"));
assert(!strcmpnul(libsimple_rawmemrelem("12345634", 8, "3", 1), "34"));
assert(!strcmpnul(libsimple_rawmemrelem("13456342", 8, "3", 1), "342"));
assert(!strcmpnul(libsimple_rawmemrelem("12345634", 4, "34", 2), "34"));
assert(!strcmpnul(libsimple_rawmemrelem("abcd1234abcd1234", 4, "1234", 4), "1234"));
assert(!strcmpnul(libsimple_rawmemrelem("abcdefgh12345678abcdefgh12345678", 4, "12345678", 8), "12345678"));
assert(!strcmpnul(libsimple_rawmemrelem("abc123abc123", 4, "123", 3), "123"));
assert(!strcmpnul(libsimple_rawmemrelem("-aa--a-a", 4, "a-", 2), "a--a-a"));
assert(!strcmpnul(libsimple_rawmemrelem("--aa----a--a", 4, "a--", 3), "a----a--a"));
assert(!strcmpnul(libsimple_rawmemrelem("---aa------a---a", 4, "a---", 4), "a------a---a"));
assert(!strcmpnul(libsimple_rawmemrelem("-------aa--------------a-------a", 4, "a-------", 8), "a--------------a-------a"));
return 0;
}
#endif
|
