1 files changed, 72 insertions, 0 deletions
diff --git a/libtiled/compression.h b/libtiled/compression.h
new file mode 100644
index 0000000..04071ee
--- /dev/null
+++ b/libtiled/compression.h
@@ -0,0 +1,72 @@
+/*
+ * compression.h
+ * Copyright 2008, Thorbjørn Lindeijer <thorbjorn@lindeijer.nl>
+ *
+ * This file is part of libtiled.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice,
+ *       this list of conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef COMPRESSION_H
+#define COMPRESSION_H
+
+#include "tiled_global.h"
+
+class QByteArray;
+
+namespace Tiled {
+
+enum CompressionMethod {
+    Gzip,
+    Zlib
+};
+
+/**
+ * Decompresses either zlib or gzip compressed memory. Returns a null
+ * QByteArray if decompressing failed.
+ *
+ * Needed because qUncompress does not support gzip compressed data. Also,
+ * this method does not need the expected size to be prepended to the data,
+ * but it can be passed as optional parameter.
+ *
+ * @param data         the compressed data
+ * @param expectedSize the expected size of the uncompressed data in bytes
+ * @return the uncompressed data, or a null QByteArray if decompressing failed
+ */
+QByteArray TILEDSHARED_EXPORT decompress(const QByteArray &data,
+                                         int expectedSize = 1024);
+
+/**
+ * Compresses the give data in either gzip or zlib format. Returns a null
+ * QByteArray if compression failed.
+ *
+ * Needed because qCompress does not support gzip compression.
+ *
+ * @param data the uncompressed data
+ * @return the compressed data, or a null QByteArray if compression failed
+ */
+QByteArray TILEDSHARED_EXPORT compress(const QByteArray &data,
+                                       CompressionMethod method = Zlib);
+
+} // namespace Tiled
+
+#endif // COMPRESSION_H