| 22 | } |
| 23 | |
| 24 | bool hex_decode(const char *str, size_t slen, void *buf, size_t bufsize) |
| 25 | { |
| 26 | unsigned char v1, v2; |
| 27 | unsigned char *p = buf; |
| 28 | |
| 29 | while (slen > 1) { |
| 30 | if (!char_to_hex(&v1, str[0]) || !char_to_hex(&v2, str[1])) |
| 31 | return false; |
| 32 | if (!bufsize) |
| 33 | return false; |
| 34 | *(p++) = (v1 << 4) | v2; |
| 35 | str += 2; |
| 36 | slen -= 2; |
| 37 | bufsize--; |
| 38 | } |
| 39 | return slen == 0 && bufsize == 0; |
| 40 | } |
| 41 | |
| 42 | static char hexchar(unsigned int val) |
| 43 | { |