Initial version

src/gzip.cpp

@@ -0,0 +1,35 @@
+#include <QtEndian>
+#include <QDebug>
+#include <zlib.h>
+#include "gzip.h"
+
+
+QByteArray Gzip::uncompress(const QByteArray &data)
+{
+	QByteArray uba;
+	z_stream stream;
+
+	quint32 *size = (quint32*)(data.constData() + data.size() - sizeof(quint32));
+	uba.resize(qFromLittleEndian(*size));
+
+	stream.zalloc = Z_NULL;
+	stream.zfree = Z_NULL;
+	stream.opaque = Z_NULL;
+
+	stream.next_in  = (Bytef*)data.constData();
+	stream.avail_in = data.size();
+	stream.next_out = (Bytef*)uba.data();
+	stream.avail_out = uba.size();
+
+	if (inflateInit2(&stream, MAX_WBITS + 16) != Z_OK)
+		return uba;
+
+	if (inflate(&stream, Z_NO_FLUSH) != Z_STREAM_END) {
+		qCritical() << "Invalid gzip data";
+		uba = QByteArray();
+	}
+
+	inflateEnd(&stream);
+
+	return uba;
+}