{

bool endOfFileSeen = false;

quint32 currentOffset = 0;

quint32 currentAddress = 0;

QByteArray currentBytes;

QFile file(fileName);

if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {

qDebug() << "Failed to open" << fileName;

return false;

}

while (!file.atEnd()) {

QByteArray line = file.readLine();

if (line.size() == 0) {

continue;

}

if (endOfFileSeen) {

qDebug() << "End-of-file record found in the middle of the file";

return false;

}

if (line[0] != ':') {

qDebug() << "Invalid line start:" << line;

return false;

}

// The starting colon will be ignored by fromHex()

QByteArray binaryLine = QByteArray::fromHex(line);

if (binaryLine.size() < 5) {

qDebug() << "Line too short:" << line;

return false;

}

quint8 dataLength = quint8(binaryLine[0]);

quint32 address = (quint32(binaryLine[1] & 0xFF) << 8) | quint32(binaryLine[2] & 0xFF);

quint8 recordType = quint8(binaryLine[3]);

if (binaryLine.size() < 5 + dataLength) {

qDebug() << "Missing data in line:" << line;

return false;

}

quint8 checksum = 0;

for (int i = 0; i < binaryLine.size() - 1; i++) {

checksum += binaryLine[i];

}

quint8 embeddedChecksum = quint8(binaryLine[4 + dataLength]);

if (quint8(checksum + embeddedChecksum) != 0) {

qDebug() << "Invalid checksum in line:" << line;

return false;

};

QByteArray data = binaryLine.mid(4, dataLength);

switch (recordType) {

case RecordType_Data:

address |= currentOffset;

if (address == currentAddress + quint32(currentBytes.size())) {

currentBytes.append(data);

} else {

if (currentBytes.size() > 0) {

output.insert(currentAddress, currentBytes);

}

currentBytes = data;

currentAddress = address;

}

break;

case RecordType_EndOfFile:

endOfFileSeen = true;

break;

case RecordType_ExtendedSegmentAddress:

if (dataLength != 2) {

qDebug() << "Invalid data length for extended segment address:" << dataLength;

return false;

}

currentOffset = ((quint32(data[0] & 0xFF) << 8) | quint32(data[1] & 0xFF)) << 4;

break;

case RecordType_StartSegmentAddress:

// Start address is not used

break;

case RecordType_ExtenededLinearAddress:

if (dataLength != 2) {

qDebug() << "Invalid data length for extended linear address:" << dataLength;

return false;

}

currentOffset = ((quint32(data[0] & 0xFF) << 8) | quint32(data[1] & 0xFF)) << 16;

break;

case RecordType_StartLinearAddress:

// Start address is not used

break;

default:

qDebug() << "Unknown record type:" << line;

return false;

}

}

if (!endOfFileSeen) {

qDebug() << "File truncated";

return false;

}

if (currentBytes.size() > 0) {

output.insert(currentAddress, currentBytes);

}

return true;