blob: 1cf9fa7441db51d0c7f36c2033e6d6d52b910d92 (
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
|
#include <assert.h>
#include "dle.h"
size_t dle_decode(const uint8_t* s, size_t ls, uint8_t* d, size_t *ld, int (*dle_func) (uint8_t c, void *user), void *user, int *dle_flag) {
size_t ns, nd;
assert(s && ls && d && ld && *ld && dle_flag);
for (ns = nd = 0; ns < ls && nd < *ld; ns++) {
if (*dle_flag) {
if (s[ns] == DLE)
d[nd++] = DLE;
else {
if (dle_func)
if (dle_func(s[ns], user) < 0) {
ns++;
break;
}
}
*dle_flag = 0;
} else {
if (s[ns] == DLE)
*dle_flag = 1;
else
d[nd++] = s[ns];
}
}
*ld = nd;
return ns;
}
size_t dle_encode(const uint8_t* s, size_t ls, uint8_t* d, size_t *ld) {
size_t ns, nd;
for (ns = nd = 0; ns < ls && nd < *ld; ns++) {
if (s[ns] == DLE) {
if (nd+1 >= *ld)
break;
d[nd++] = DLE;
}
d[nd++] = s[ns];
}
*ld = nd;
return ns;
}
|