Method OpenKey

Source/cmWindowsRegistry.cxx:139–177

};

KeyHandler KeyHandler::OpenKey(cm::string_view rootKey, cm::string_view subKey,
                               View view)
{
  if (view == View::Reg64 && !Is64BitWindows()) {
    throw registry_error("No 64bit registry on Windows32.");
  }

  HKEY hRootKey;
  if (rootKey == "HKCU"_s || rootKey == "HKEY_CURRENT_USER"_s) {
    hRootKey = HKEY_CURRENT_USER;
  } else if (rootKey == "HKLM"_s || rootKey == "HKEY_LOCAL_MACHINE"_s) {
    hRootKey = HKEY_LOCAL_MACHINE;
  } else if (rootKey == "HKCR"_s || rootKey == "HKEY_CLASSES_ROOT"_s) {
    hRootKey = HKEY_CLASSES_ROOT;
  } else if (rootKey == "HKCC"_s || rootKey == "HKEY_CURRENT_CONFIG"_s) {
    hRootKey = HKEY_CURRENT_CONFIG;
  } else if (rootKey == "HKU"_s || rootKey == "HKEY_USERS"_s) {
    hRootKey = HKEY_USERS;
  } else {
    throw registry_error(cmStrCat(rootKey, ": invalid root key."));
  }
  // Update path format
  auto key = ToWide(subKey);
  std::replace(key.begin(), key.end(), L'/', L'\\');

  REGSAM options = KEY_READ;
  if (Is64BitWindows()) {
    options |= view == View::Reg64 ? KEY_WOW64_64KEY : KEY_WOW64_32KEY;
  }

  HKEY hKey;
  LSTATUS status;
  if ((status = RegOpenKeyExW(hRootKey, key.c_str(), 0, options, &hKey)) !=
      ERROR_SUCCESS) {
    throw registry_error(FormatSystemError(status));
  }

  return KeyHandler(hKey);
}

KeyHandler KeyHandler::OpenKey(cm::string_view key, View view)
{