Function ReadAllKeys

cpp/src/arrow/flight/sql/odbc/odbc_impl/config/configuration.cc:84–118

}

std::vector<std::string> ReadAllKeys(const std::string& dsn) {
  CONVERT_SQLWCHAR_STR(wdsn, dsn);

  std::vector<SQLWCHAR> buf(BUFFER_SIZE);

  int ret = SQLGetPrivateProfileString(reinterpret_cast<LPCWSTR>(wdsn.c_str()), NULL,
                                       reinterpret_cast<LPCWSTR>(L""), buf.data(),
                                       static_cast<int>(buf.size()), ODBC_INI);

  if (ret > BUFFER_SIZE) {
    // If there wasn't enough space, try again with the right size buffer.
    buf.resize(ret + 1);
    ret = SQLGetPrivateProfileString(reinterpret_cast<LPCWSTR>(wdsn.c_str()), NULL,
                                     reinterpret_cast<LPCWSTR>(L""), buf.data(),
                                     static_cast<int>(buf.size()), ODBC_INI);
  }

  // When you pass NULL to SQLGetPrivateProfileString it gives back a \0 delimited list of
  // all the keys. The below loop simply tokenizes all the keys and places them into a
  // vector.
  std::vector<std::string> keys;
  SQLWCHAR* begin = buf.data();
  while (begin && *begin != '\0') {
    SQLWCHAR* cur;
    for (cur = begin; *cur != '\0'; ++cur) {
    }

    std::string key("");
    SQLINTEGER key_len = static_cast<SQLINTEGER>(cur - begin);
    SetAttributeSQLWCHAR(begin, key_len * GetSqlWCharSize(), key);
    keys.emplace_back(key);
    begin = ++cur;
  }
  return keys;
}
}  // namespace

Configuration::Configuration() {