//------------------------------------------------------------------------------
// Read a record
//------------------------------------------------------------------------------
const DataRecordHandle* NetInput::readRecordImp()
{
// First pass? Does the file need to be opened?
if (firstPassFlg) {
if ( !networkInitialized ) {
initNetworks();
}
firstPassFlg = false;
}
DataRecordHandle* handle = 0;
// When the file is open and ready ...
if ( networkInitialized && netHandler->isConnected() ) {
// ---
// Try to read a message into 'ibuf'
// ---
unsigned int n = 0;
n = netHandler->recvData( ibuf, MAX_INPUT_BUFFER_SIZE );
// ---
// If we've successfully read a message from the network
// then parse it as a DataRecord and put it into a Handle.
// ---
if (n > 0) {
// Parse the data record
std::string wireFormat(ibuf, n);
Pb::DataRecord* dataRecord = new Pb::DataRecord();
bool ok = dataRecord->ParseFromString(wireFormat);
if (ok) {
// Create a handle for the data record (it now has ownership)
handle = new DataRecordHandle(dataRecord);
}
else if (isMessageEnabled(MSG_ERROR | MSG_WARNING)) {
std::cerr << "NetInput::readRecord() -- ParseFromString() error" << std::endl;
delete dataRecord;
dataRecord = 0;
}
}
}
return handle;
}
//------------------------------------------------------------------------------
// Close the data file
//------------------------------------------------------------------------------
void FileWriter::closeFile()
{
if (isOpen()) {
// ---
// Write the EOD message, if it hasn't already been.
if (!eodFlag) {
eodFlag = true;
// write something to signify don't read any more (e.g., last message)
Pb::DataRecord* lastMsg = new Pb::DataRecord();
// This will be the token representing the last message, but it can be
// anything that is not one of the other event messages
lastMsg->set_id(REID_END_OF_DATA);
// Time is also required, although not used:
Pb::Time* time = lastMsg->mutable_time();
time->set_exec_time(0);
time->set_sim_time(0);
time->set_utc_time(0);
// get a handle
DataRecordHandle* handle = new DataRecordHandle(lastMsg);
// write the message
processRecordImp(handle);
handle->unref();
handle = nullptr;
}
// now close the file
sout->close();
fileOpened = false;
fileFailed = false;
}
}
//------------------------------------------------------------------------------
// Read a record
//------------------------------------------------------------------------------
const DataRecordHandle* FileReader::readRecordImp()
{
DataRecordHandle* handle = nullptr;
// First pass? Does the file need to be opened?
if (firstPassFlg) {
if ( !isOpen() && !isFailed() ) {
openFile();
}
firstPassFlg = false;
}
// When the file is open and ready ...
if ( isOpen() && !isFailed() && !sin->eof() ) {
// Number of bytes in the next serialized DataRecord
unsigned int n = 0;
// ---
// Read the size of the next serialized DataRecord
// ---
char nbuff[8];
sin->read(nbuff, 4);
// Check for error or eof
if ( sin->eof() || sin->fail() ) {
fileFailed = sin->fail();
if (fileFailed && isMessageEnabled(MSG_ERROR | MSG_WARNING)) {
std::cerr << "FileReader::readRecord() -- error reading data record size" << std::endl;
}
}
// Ok then get the size of the message from the buffer
else {
nbuff[4] = '\0';
n = std::atoi(nbuff);
}
// ---
// Read the serialized DataRecord from the file, parse it as a DataRecord
// and put it into a Handle.
// ---
if (n > 0) {
// Read message into ibuf
sin->read(ibuf, n);
// Check for error or eof
if ( sin->eof() || sin->fail() ) {
if (isMessageEnabled(MSG_ERROR | MSG_WARNING)) {
std::cerr << "FileReader::readRecord() -- error reading data record" << std::endl;
}
fileFailed = true;
}
// Ok, create the DataRecord with handle
else {
// Parse the DataRecord
std::string wireFormat(ibuf, n);
Pb::DataRecord* dataRecord = new Pb::DataRecord();
bool ok = dataRecord->ParseFromString(wireFormat);
// Create a handle for the DataRecord (it now has ownership)
if (ok) {
handle = new DataRecordHandle(dataRecord);
}
// parsing error
else if (isMessageEnabled(MSG_ERROR | MSG_WARNING)) {
std::cerr << "FileReader::readRecord() -- ParseFromString() error" << std::endl;
delete dataRecord;
dataRecord = nullptr;
}
}
}
}
return handle;
}
