Function SqlWcharToString

cpp/src/arrow/flight/sql/odbc/odbc_impl/encoding_utils.h:97–111

\brief Convert buffer of SqlWchar to standard string \param[in] wchar_msg SqlWchar to convert \param[in] msg_len Number of characters in wchar_msg \return wchar_msg in std::string format

/// \param[in] msg_len Number of characters in wchar_msg
/// \return wchar_msg in std::string format
inline std::string SqlWcharToString(SQLWCHAR* wchar_msg, SQLINTEGER msg_len = SQL_NTS) {
  if (msg_len == 0 || !wchar_msg || wchar_msg[0] == 0) {
    return std::string();
  }

  thread_local std::vector<uint8_t> utf8_str;

  if (msg_len == SQL_NTS) {
    arrow::flight::sql::odbc::WcsToUtf8((void*)wchar_msg, &utf8_str);
  } else {
    arrow::flight::sql::odbc::WcsToUtf8((void*)wchar_msg, msg_len, &utf8_str);
  }

  return std::string(utf8_str.begin(), utf8_str.end());
}

/// \brief Convert vector of SqlWchar to standard string
/// \param[in] wchar_vec SqlWchar vector to convert