Function ParseKeySlice

src/io/coding.cc:12–35

namespace io {

bool ParseKeySlice(const leveldb::Slice& key, int64_t* timestamp, UserKeyType* type,
                   leveldb::Slice* short_key, leveldb::Slice* time_key) {
  if (key.size() < sizeof(UserKeyType)) {
    return false;
  } else if (time_key) {
    *time_key = leveldb::Slice(key.data(), key.size() - sizeof(UserKeyType));
  }

  if (key.size() < sizeof(uint64_t)) {
    return false;
  }

  if (short_key) {
    *short_key = leveldb::Slice(key.data(), key.size() - sizeof(uint64_t));
  }
  uint64_t num = DecodeFixed64(key.data() + key.size() - sizeof(uint64_t));
  if (type) {
    *type = static_cast<UserKeyType>(num & 0xff);
  }
  if (timestamp) {
    *timestamp = static_cast<int64_t>(num >> sizeof(UserKeyType));
  }
  return true;
}

void PackUserKey(const std::string& key, int64_t timestamp, UserKeyType type,
                 std::string* packed_key) {