74 static std::string Key(uint64_t k) {  in Key()  argument
77     ret.append(reinterpret_cast<char*>(&k), sizeof(k));  in Key()
79     char buf[sizeof(k)];  in Key()
80     buf[0] = k & 0xff;  in Key()
81     buf[1] = (k >> 8) & 0xff;  in Key()
82     buf[2] = (k >> 16) & 0xff;  in Key()
83     buf[3] = (k >> 24) & 0xff;  in Key()
84     buf[4] = (k >> 32) & 0xff;  in Key()
85     buf[5] = (k >> 40) & 0xff;  in Key()
86     buf[6] = (k >> 48) & 0xff;  in Key()
87     buf[7] = (k >> 56) & 0xff;  in Key()
88     ret.append(buf, sizeof(k));  in Key()