1 files changed, 148 insertions, 0 deletions
diff --git a/package/source/zipapi/Deflater.cxx b/package/source/zipapi/Deflater.cxx
new file mode 100644
index 000000000..5c0fd7012
--- /dev/null
+++ b/package/source/zipapi/Deflater.cxx
@@ -0,0 +1,148 @@
+/* -*- 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 .
+ */
+
+#include <package/Deflater.hxx>
+#include <zlib.h>
+#include <com/sun/star/packages/zip/ZipConstants.hpp>
+#include <osl/diagnose.h>
+#include <string.h>
+
+using namespace com::sun::star::packages::zip::ZipConstants;
+using namespace com::sun::star;
+using namespace ZipUtils;
+
+/** Provides general purpose compression using the ZLIB compression
+ * library.
+ */
+
+Deflater::~Deflater()
+{
+    end();
+}
+void Deflater::init (sal_Int32 nLevelArg, bool bNowrap)
+{
+    pStream.reset(new z_stream);
+    /* Memset it to 0...sets zalloc/zfree/opaque to NULL */
+    memset (pStream.get(), 0, sizeof(*pStream));
+
+    switch (deflateInit2(pStream.get(), nLevelArg, Z_DEFLATED, bNowrap? -MAX_WBITS : MAX_WBITS,
+                DEF_MEM_LEVEL, DEFAULT_STRATEGY))
+    {
+        case Z_OK:
+            break;
+        case Z_MEM_ERROR:
+            pStream.reset();
+            break;
+        case Z_STREAM_ERROR:
+            pStream.reset();
+            break;
+        default:
+             break;
+    }
+}
+
+Deflater::Deflater(sal_Int32 nSetLevel, bool bNowrap)
+: bFinish(false)
+, bFinished(false)
+, nOffset(0)
+, nLength(0)
+{
+    init(nSetLevel, bNowrap);
+}
+
+sal_Int32 Deflater::doDeflateBytes (uno::Sequence < sal_Int8 > &rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength)
+{
+    sal_Int32 nResult;
+    pStream->next_in   = reinterpret_cast<const unsigned char*>( sInBuffer.getConstArray() + nOffset );
+    pStream->next_out  = reinterpret_cast<unsigned char*>(rBuffer.getArray())+nNewOffset;
+    pStream->avail_in  = nLength;
+    pStream->avail_out = nNewLength;
+
+#if !defined Z_PREFIX
+    nResult = deflate(pStream.get(), bFinish ? Z_FINISH : Z_NO_FLUSH);
+#else
+    nResult = z_deflate(pStream.get(), bFinish ? Z_FINISH : Z_NO_FLUSH);
+#endif
+    switch (nResult)
+    {
+        case Z_STREAM_END:
+            bFinished = true;
+            [[fallthrough]];
+        case Z_OK:
+            nOffset += nLength - pStream->avail_in;
+            nLength = pStream->avail_in;
+            return nNewLength - pStream->avail_out;
+        default:
+            return 0;
+    }
+}
+
+void Deflater::setInputSegment( const uno::Sequence< sal_Int8 >& rBuffer )
+{
+    sInBuffer = rBuffer;
+    nOffset = 0;
+    nLength = rBuffer.getLength();
+}
+
+bool Deflater::needsInput() const
+{
+    return nLength <=0;
+}
+void Deflater::finish(  )
+{
+    bFinish = true;
+}
+sal_Int32 Deflater::doDeflateSegment( uno::Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewLength )
+{
+    OSL_ASSERT( !(nNewLength < 0 || nNewLength > rBuffer.getLength()));
+    return doDeflateBytes(rBuffer, /*nNewOffset*/0, nNewLength);
+}
+sal_Int64 Deflater::getTotalIn() const
+{
+    return pStream->total_in; // FIXME64: zlib doesn't look 64bit clean here
+}
+sal_Int64 Deflater::getTotalOut() const
+{
+    return pStream->total_out; // FIXME64: zlib doesn't look 64bit clean here
+}
+void Deflater::reset(  )
+{
+#if !defined Z_PREFIX
+    deflateReset(pStream.get());
+#else
+    z_deflateReset(pStream.get());
+#endif
+    bFinish = false;
+    bFinished = false;
+    nOffset = nLength = 0;
+}
+void Deflater::end(  )
+{
+    if (pStream)
+    {
+#if !defined Z_PREFIX
+        deflateEnd(pStream.get());
+#else
+        z_deflateEnd(pStream.get());
+#endif
+        pStream.reset();
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */