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#include "dle.h"
/* Those nifty DLE-sequences */
#define DLE 0x10
#define ETX 0x03
#define DC4 0x14
size_t dle_decode(uint8_t* s, size_t ls, uint8_t* d, size_t *ld, void (*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)
dle_func(s[ns], user);
}
*dle_flag = 0;
} else {
if (s[ns] == DLE)
*dle_flag = 1;
else
d[nd++] = s[ns];
}
}
*ld = nd;
return ns;
}
size_t dle_encode(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)
d[nd++] = DLE;
d[nd++] = s[ns];
}
*ld = nd;
return ns;
}
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