Function HexEncode

util/string/hex.cpp:20–30

                                     "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff");

char* HexEncode(const void* in, size_t len, char* out) {
    const unsigned char* b = (const unsigned char*)in;
    const unsigned char* e = b + len;

    while (b != e) {
        *out++ = DigitToChar(*b / 16);
        *out++ = DigitToChar(*b++ % 16);
    }

    return out;
}

void* HexDecode(const void* in, size_t len, void* ptr) {
    const char* b = (const char*)in;