/*
* Convert a windows error to human readable string
* uses retval as errorcode, or, if 0, use GetLastError()
*/
const char *WindowsErrorString(void)
{
static char err_string[256] = { 0 };
DWORD size;
DWORD errcode, format_error;
errcode = GetLastError();
static_sprintf(err_string, "[0x%08lX] ", errcode);
size = FormatMessageU(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, HRESULT_CODE(errcode),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), &err_string[strlen(err_string)],
sizeof(err_string) - (DWORD)strlen(err_string), NULL);
if (size == 0) {
format_error = GetLastError();
if ((format_error) && (format_error != 0x13D)) // 0x13D, decode error, is returned for unknown codes
static_sprintf(err_string, "Windows error code 0x%08lX (FormatMessage error code 0x%08lX)",
errcode, format_error);
else
static_sprintf(err_string, "Unknown error 0x%08lX", errcode);
}
SetLastError(errcode); // Make sure we don't change the errorcode on exit
return err_string;
}
std::string FormattedMessageLoader::GetFormattedMessage(
IErrorReporter& reporter,
DWORD messageId)
{
this->RequireValid();
return FormatMessageU(reporter, this->hModule, messageId, nullptr);
}
std::string FormattedMessageLoader::GetFormattedMessage(
IErrorReporter& reporter,
DWORD messageId,
std::vector<std::wstring> const& arguments)
{
this->RequireValid();
std::vector<DWORD_PTR> argumentPtrs;
argumentPtrs.reserve(arguments.size());
std::transform(arguments.cbegin(), arguments.cend(), std::back_inserter(argumentPtrs),
[](std::wstring const& str) { return reinterpret_cast<DWORD_PTR>(str.c_str()); });
auto argPtr = reinterpret_cast<va_list*>(argumentPtrs.data());
if (arguments.empty())
{
argPtr = nullptr;
}
return FormatMessageU(reporter, this->hModule, messageId, argPtr);
}
