-
Notifications
You must be signed in to change notification settings - Fork 20
/
compat.c
47 lines (44 loc) · 941 Bytes
/
compat.c
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
/* Carsten Kunze, 2016 */
#include <string.h>
#ifndef HAVE_STRLCPY
size_t
strlcpy(char *dst, const char *src, size_t dstsize) {
size_t srcsize;
/* Not conform to strlcpy, but avoids to access illegal memory in case
* of unterminated strings */
for (srcsize = 0; srcsize < dstsize; srcsize++)
if (!src[srcsize])
break;
if (dstsize > srcsize)
dstsize = srcsize;
else if (dstsize)
dstsize--;
if (dstsize)
/* assumes non-overlapping buffers */
memcpy(dst, src, dstsize);
dst[dstsize] = 0;
return srcsize;
}
#endif
#ifndef HAVE_STRLCAT
size_t
strlcat(char *dst, const char *src, size_t dstsize) {
size_t ld, ls;
for (ld = 0; ld < dstsize - 1; ld++)
if (!dst[ld])
break;
dst += ld;
dstsize -= ld;
for (ls = 0; ls < dstsize; ls++)
if (!src[ls])
break;
if (dstsize > ls)
dstsize = ls;
else if (dstsize)
dstsize--;
if (dstsize)
memcpy(dst, src, dstsize);
dst[dstsize] = 0;
return ld + ls;
}
#endif