static int
parse_hex_string(const char *src, uint8_t *dst, uint32_t *size)
{
- char *c = NULL;
- uint32_t i, len;
- char tmp[3];
+ uint32_t left = *size;
+ const uint8_t *head = dst;
/* Check input parameters */
if ((src == NULL) ||
return -1;
/* Convert chars to bytes */
- for (i = 0, len = 0; i < *size; i += 2) {
- snprintf(tmp, 3, "%s", src + i);
- dst[len++] = strtoul(tmp, &c, 16);
- if (*c != 0) {
- len--;
- dst[len] = 0;
- *size = len;
+ while (left) {
+ char tmp[3], *end = tmp;
+ uint32_t read_lim = left & 1 ? 1 : 2;
+
+ snprintf(tmp, read_lim + 1, "%s", src);
+ *dst = strtoul(tmp, &end, 16);
+ if (*end) {
+ *dst = 0;
+ *size = (uint32_t)(dst - head);
return -1;
}
+ left -= read_lim;
+ src += read_lim;
+ dst++;
}
- dst[len] = 0;
- *size = len;
-
+ *dst = 0;
+ *size = (uint32_t)(dst - head);
return 0;
}