1 files changed, 96 insertions, 0 deletions
diff --git a/package/source/zipapi/CRC32.cxx b/package/source/zipapi/CRC32.cxx
new file mode 100644
index 000000000000..2ee6b1feea1a
--- /dev/null
+++ b/package/source/zipapi/CRC32.cxx
@@ -0,0 +1,96 @@
+/*************************************************************************
+ *
+ * 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.
+ *
+ ************************************************************************/
+
+// MARKER(update_precomp.py): autogen include statement, do not remove
+#include "precompiled_package.hxx"
+#include <CRC32.hxx>
+#ifndef _ZLIB_H
+#ifdef SYSTEM_ZLIB
+#include <zlib.h>
+#else
+#include <external/zlib/zlib.h>
+#endif
+#endif
+#include <PackageConstants.hxx>
+#include <com/sun/star/io/XInputStream.hpp>
+
+using namespace rtl;
+using namespace com::sun::star::uno;
+using namespace com::sun::star::io;
+
+/** A class to compute the CRC32 value of a data stream
+ */
+
+CRC32::CRC32()
+: nCRC(0)
+{
+}
+CRC32::~CRC32()
+{
+}
+void SAL_CALL CRC32::reset()
+    throw(RuntimeException)
+{
+    nCRC=0;
+}
+sal_Int32 SAL_CALL CRC32::getValue()
+    throw(RuntimeException)
+{
+    return nCRC & 0xFFFFFFFFL;
+}
+/** Update CRC32 with specified sequence of bytes
+ */
+void SAL_CALL CRC32::updateSegment(const Sequence< sal_Int8 > &b,
+                                    sal_Int32 off,
+                                    sal_Int32 len)
+        throw(RuntimeException)
+{
+    nCRC = crc32(nCRC, (const unsigned char*)b.getConstArray()+off, len );
+}
+/** Update CRC32 with specified sequence of bytes
+ */
+void SAL_CALL CRC32::update(const Sequence< sal_Int8 > &b)
+        throw(RuntimeException)
+{
+    nCRC = crc32(nCRC, (const unsigned char*)b.getConstArray(),b.getLength());
+}
+
+sal_Int32 SAL_CALL CRC32::updateStream( Reference < XInputStream > & xStream )
+    throw ( RuntimeException )
+{
+    sal_Int32 nLength, nTotal = 0;
+    Sequence < sal_Int8 > aSeq ( n_ConstBufferSize );
+    do
+    {
+        nLength = xStream->readBytes ( aSeq, n_ConstBufferSize );
+        updateSegment ( aSeq, 0, nLength );
+        nTotal += nLength;
+    }
+    while ( nLength == n_ConstBufferSize );
+
+    return nTotal;
+}