1 files changed, 92 insertions, 0 deletions
diff --git a/lyt/common.cpp b/lyt/common.cpp
new file mode 100644
index 0000000..f23e68a
--- /dev/null
+++ b/lyt/common.cpp
@@ -0,0 +1,92 @@
+#include "common.h"
+
+QByteArray PadByteArray(QByteArray original, int newLength, char padWith) {
+	QByteArray newArray = original;
+
+	if (original.length() > newLength) {
+		// the original array is longer than the length desired, so truncate it
+		newArray.truncate(newLength);
+
+	} else if (original.length() < newLength) {
+		// the original array is shorter, so pad it
+		int oldLength = original.length();
+		newArray.resize(newLength);
+
+		for (int i = oldLength; i < newLength; i++) {
+			newArray[i] = '\0';
+		}
+	}
+
+	return newArray;
+}
+
+QStringList ReadStringList(QDataStream &in) {
+	QStringList output;
+
+	quint16 count;
+	in >> (quint16&)count;
+	in.skipRawData(2); // padding
+
+	QVector<quint32> stringOffsets(count);
+
+	// save the initial offset so we can get the strings later
+	// string offsets are based on the first offset entry (after the count)
+	// NOT on the section offset
+	qint64 savedPos = in.device()->pos();
+
+	for (int i = 0; i < count; i++) {
+		quint32 offset;
+		in >> (quint32&)offset;
+		in.skipRawData(4); // unused?
+
+		stringOffsets[i] = offset;
+	}
+
+	// ok, now we can get the strings
+	for (int i = 0; i < count; i++) {
+		in.device()->seek(savedPos + stringOffsets[i]);
+
+		// how fun: no length is stored for each string, they're just zero
+		// terminated. so let's try to figure it out!
+		int stringLength = 0;
+		char check;
+
+		in >> (quint8&)check;
+		while (check != 0) {
+			stringLength += 1;
+			in >> (quint8&)check;
+		}
+
+		// now read the string
+		char *buffer = new char[stringLength];
+
+		in.device()->seek(savedPos + stringOffsets[i]);
+		in.readRawData(buffer, stringLength);
+
+		output.append(QString::fromAscii(buffer, stringLength));
+
+		delete[] buffer;
+
+
+		qDebug() << "Read string:" << output.last();
+	}
+
+	return output;
+}
+
+QString ReadFixedLengthASCII(QDataStream &in, int length) {
+	QByteArray readStr(length, '\0');
+	in.readRawData(readStr.data(), readStr.length());
+
+	QString str = QString::fromAscii(readStr.data(), readStr.length());
+	if (str.contains(QChar('\0')))
+		str.truncate(str.indexOf(QChar('\0')));
+
+	return str;
+}
+
+void WriteFixedLengthASCII(QDataStream &out, QString str, int length) {
+	QByteArray paddedStr = PadByteArray(str.toAscii(), length);
+	out.writeRawData(paddedStr.constData(), paddedStr.length());
+}
+