1 files changed, 79 insertions, 0 deletions
diff --git a/filter/source/graphicfilter/itiff/lzwdecom.hxx b/filter/source/graphicfilter/itiff/lzwdecom.hxx
new file mode 100644
index 000000000000..164812878865
--- /dev/null
+++ b/filter/source/graphicfilter/itiff/lzwdecom.hxx
@@ -0,0 +1,79 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef _LZWDECOM_HXX
+#define _LZWDECOM_HXX
+
+#include <tools/stream.hxx>
+
+struct LZWTableEntry {
+    USHORT nPrevCode;
+    USHORT nDataCount;
+    BYTE nData;
+};
+
+class LZWDecompressor {
+
+public:
+
+    LZWDecompressor();
+    ~LZWDecompressor();
+
+    void StartDecompression(SvStream & rIStream);
+
+    ULONG Decompress(BYTE * pTarget, ULONG nMaxCount);
+        // Liefert die Anzahl der geschriebenen Bytes, wenn < nMaxCount,
+        // sind keine weiteren Daten zu entpacken, oder es ist ein
+        // Fehler aufgetreten.
+
+private:
+
+    USHORT GetNextCode();
+    void AddToTable(USHORT nPrevCode, USHORT nCodeFirstData);
+    void DecompressSome();
+
+    SvStream * pIStream;
+
+    LZWTableEntry * pTable;
+    USHORT nTableSize;
+
+    BOOL bEOIFound, bInvert, bFirst;
+
+    USHORT nOldCode;
+
+    BYTE * pOutBuf;
+    BYTE * pOutBufData;
+    USHORT nOutBufDataLen;
+
+    BYTE nInputBitsBuf;
+    USHORT nInputBitsBufSize;
+};
+
+
+#endif
+
+