blob: d634138e412ba80b5fb55947ced19e0fe28d0b38 (
plain)
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
|
#include <limits.h>
#include <string.h>
#if ULONG_MAX != 18446744073709551615UL && ULONG_MAX != 4294967295UL
# error need sizeof(long) == 4 or sizeof(long) == 8
#endif
void* memset(void* m, int ch, size_t s)
{
size_t i;
char* mem = (char*)m;
long* lmem;
if(s < sizeof(long))
{
for(i = 0; i < s; i++)
mem[i] = ch;
return m;
}
long l = ch & 0xFF;
l = l | (l << 8);
l = l | (l << 16);
#if ULONG_MAX == 18446744073709551615UL
l = l | (l << 32);
#endif
while((long)mem & (sizeof(long)-1))
*mem++ = ch, s--;
lmem = (long*)mem;
for(i = 0; i+7 < s/sizeof(long); i += 8)
{
lmem[i+0] = l;
lmem[i+1] = l;
lmem[i+2] = l;
lmem[i+3] = l;
lmem[i+4] = l;
lmem[i+5] = l;
lmem[i+6] = l;
lmem[i+7] = l;
}
lmem += i;
s -= i*sizeof(long);
for(i = 0; i < s/sizeof(long); i++)
lmem[i] = l;
lmem += i;
s -= i*sizeof(long);
mem = (char*)lmem;
for(i = 0; i < s; i++)
mem[i] = ch;
return m;
}
|