Function Uint64ToString

src/leveldb/util/string_ext.cc:125–135

char* StringAsArray(std::string* str) { return str->empty() ? NULL : &*str->begin(); }

std::string Uint64ToString(uint64_t i, int base) {
  std::stringstream ss;
  if (base == 16) {
    ss << std::hex << std::setfill('0') << std::setw(16) << i;
  } else if (base == 8) {
    ss << std::oct << std::setfill('0') << std::setw(8) << i;
  } else {
    ss << i;
  }
  return ss.str();
}

uint64_t StringToUint64(const std::string& int_str, int base) {
  uint64_t value;