void SystemException::createMessage(const TCHAR *userMessage, int errcode)
{
_ASSERT(!(userMessage == 0 && errcode == ERROR_SUCCESS));
bool formatMessageOk = true;
TCHAR buffer[1024 * 10] = {0};
if (FormatMessage(
FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
errcode,
MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT),
(LPTSTR)&buffer[0],
sizeof(buffer),
NULL) == 0) {
formatMessageOk = false;
}
StringStorage windowsErrorDescription(buffer);
const TCHAR badCharacters[] = { 10, 13, _T('\n'), _T('\t') };
windowsErrorDescription.removeChars(badCharacters, sizeof(badCharacters) / sizeof(TCHAR));
if (windowsErrorDescription.endsWith(_T('.'))) {
windowsErrorDescription.truncate(1);
}
if (formatMessageOk) {
m_systemMessage.format(_T("%s (error code %d)"),
windowsErrorDescription.getString(),
errcode);
} else {
m_systemMessage.format(_T("Error code %d"), errcode);
}
if (errcode != 0) {
if (userMessage == 0) {
m_message = m_systemMessage;
} else {
m_message.format(_T("%s (system error: %s)"),
userMessage,
m_systemMessage.getString());
}
} else {
m_message = userMessage;
m_systemMessage = userMessage;
}
}
void SystemException::createMessage(const TCHAR *userMessage, int errcode)
{
if (userMessage == 0 && errcode == ERROR_SUCCESS) {
userMessage = _T("Thrown a system exception but the program")
_T(" cannot identify the corresponding system error.");
}
// Get description of windows specific error.
bool formatMessageOk = true;
TCHAR buffer[1024 * 10] = {0};
if (FormatMessage(
FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
errcode,
MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT),
(LPTSTR)&buffer[0],
sizeof(buffer),
NULL) == 0) {
formatMessageOk = false;
}
StringStorage windowsErrorDescription(buffer);
// Remove bad characters.
const TCHAR badCharacters[] = { 10, 13, _T('\n'), _T('\t') };
windowsErrorDescription.removeChars(badCharacters, sizeof(badCharacters) / sizeof(TCHAR));
if (windowsErrorDescription.endsWith(_T('.'))) {
windowsErrorDescription.truncate(1);
}
// Create system error part of message.
if (formatMessageOk) {
m_systemMessage.format(_T("%s (error code %d)"),
windowsErrorDescription.getString(),
errcode);
} else {
m_systemMessage.format(_T("Error code %d"), errcode);
}
// Use user message if specified.
if (errcode != 0) {
if (userMessage == 0) {
m_message = m_systemMessage;
} else {
m_message.format(_T("%s (system error: %s)"),
userMessage,
m_systemMessage.getString());
}
} else {
m_message = userMessage;
m_systemMessage = userMessage;
}
}
