int ucs2_utf8(wchar_t in, unsigned char* out) {
    if (in < 0x80) {
        out[0] = in;
        out[1] = 0;
        return 0;
    }
    else if (in < 0x800) {
        out[0] = 0xC0 | ((in & 0x07C0) >> 6);
        out[1] = 0x80 |  (in & 0x003F);
        out[2] = 0;
        return 0;
    }
    else if (in < 0x10000) {
        out[0] = 0xE0 | ((in & 0xF000) >> 12);
        out[1] = 0x80 | ((in & 0x0FC0) >> 6);
        out[2] = 0x80 |  (in & 0x003F);
        out[3] = 0;
        return 0;
    }
    return -1;
}