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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_TOOLS_ZCODEC_HXX
+#define INCLUDED_TOOLS_ZCODEC_HXX
+
+#include <tools/toolsdllapi.h>
+
+#define ZCODEC_NO_COMPRESSION 0
+#define ZCODEC_DEFAULT_COMPRESSION 6
+
+class SvStream;
+
+// The overall client call protocol is one of:
+// * BeginCompression, Compress, EndCompression
+// * BeginCompression, Decompress, EndCompression
+// * BeginCompression, Write*, EndCompression
+// * BeginCompression, Read*, EndCompression
+// * BeginCompression, ReadAsynchron*, EndCompression
+class SAL_WARN_UNUSED TOOLS_DLLPUBLIC ZCodec
+{
+ enum State { STATE_INIT, STATE_DECOMPRESS, STATE_COMPRESS };
+ State meState;
+ bool mbStatus;
+ bool mbFinish;
+ sal_uInt8* mpInBuf;
+ size_t mnInBufSize;
+ size_t mnInToRead;
+ SvStream* mpOStm;
+ sal_uInt8* mpOutBuf;
+ size_t mnOutBufSize;
+
+ int mnCompressLevel;
+ bool mbGzLib;
+ void* mpsC_Stream;
+
+ void InitCompress();
+ void InitDecompress(SvStream & inStream);
+ void ImplWriteBack();
+
+public:
+ ZCodec( size_t nInBufSize = 32768, size_t nOutBufSize = 32768 );
+ ~ZCodec();
+
+ void BeginCompression( int nCompressLevel = ZCODEC_DEFAULT_COMPRESSION, bool gzLib = false );
+ long EndCompression();
+
+ void Compress( SvStream& rIStm, SvStream& rOStm );
+ long Decompress( SvStream& rIStm, SvStream& rOStm );
+ bool AttemptDecompression( SvStream& rIStm, SvStream& rOStm );
+
+ void Write( SvStream& rOStm, const sal_uInt8* pData, sal_uInt32 nSize );
+ long Read( SvStream& rIStm, sal_uInt8* pData, sal_uInt32 nSize );
+ long ReadAsynchron( SvStream& rIStm, sal_uInt8* pData, sal_uInt32 nSize );
+
+ void SetBreak( size_t );
+ size_t GetBreak() const;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */