1 files changed, 137 insertions, 0 deletions
diff --git a/shell/source/win32/shlxthandler/ooofilt/stream_helper.cxx b/shell/source/win32/shlxthandler/ooofilt/stream_helper.cxx
new file mode 100644
index 000000000..76578ba70
--- /dev/null
+++ b/shell/source/win32/shlxthandler/ooofilt/stream_helper.cxx
@@ -0,0 +1,137 @@
+/* -*- 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 .
+ */
+
+
+#if !defined WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+
+#include <stdio.h>
+#include <objidl.h>
+#include <stream_helper.hxx>
+
+BufferStream::BufferStream(IStream *str) :
+    stream(str)
+{
+    // These next few lines work around the "Seek pointer" bug found on Vista.
+    char cBuf[20];
+    unsigned long nCount;
+    ULARGE_INTEGER nNewPosition;
+    LARGE_INTEGER nMove;
+    nMove.QuadPart = 0;
+    stream->Seek( nMove, STREAM_SEEK_SET, &nNewPosition );
+    stream->Read( cBuf, 20, &nCount );
+}
+
+BufferStream::~BufferStream()
+{
+}
+
+unsigned long BufferStream::sread (unsigned char *buf, unsigned long size)
+{
+    unsigned long newsize;
+    HRESULT hr;
+
+    hr = stream->Read (buf, size, &newsize);
+    if (hr == S_OK)
+        return newsize;
+    else
+        return static_cast<unsigned long>(0);
+}
+
+long BufferStream::stell ()
+{
+    HRESULT hr;
+    LARGE_INTEGER Move;
+    ULARGE_INTEGER NewPosition;
+    Move.QuadPart = 0;
+    NewPosition.QuadPart = 0;
+
+    hr = stream->Seek (Move, STREAM_SEEK_CUR, &NewPosition);
+    if (hr == S_OK)
+        return static_cast<long>(NewPosition.QuadPart);
+    else
+        return -1;
+}
+
+long BufferStream::sseek (long offset, int origin)
+{
+    HRESULT hr;
+    LARGE_INTEGER Move;
+    DWORD dwOrigin;
+    Move.QuadPart = static_cast<__int64>(offset);
+
+    switch (origin)
+    {
+    case SEEK_CUR:
+        dwOrigin = STREAM_SEEK_CUR;
+        break;
+    case SEEK_END:
+        dwOrigin = STREAM_SEEK_END;
+        break;
+    case SEEK_SET:
+        dwOrigin = STREAM_SEEK_SET;
+        break;
+    default:
+        return -1;
+    }
+
+    hr = stream->Seek (Move, dwOrigin, nullptr);
+    if (hr == S_OK)
+        return 0;
+    else
+        return -1;
+}
+
+FileStream::FileStream(const Filepath_char_t *filename) :
+    file(nullptr)
+{
+    // fdo#67534: avoid locking to not interfere with soffice opening the file
+    file = _wfsopen(filename, L"rb", _SH_DENYNO);
+}
+
+FileStream::~FileStream()
+{
+    if (file)
+        fclose(file);
+}
+
+unsigned long FileStream::sread (unsigned char *buf, unsigned long size)
+{
+    if (file)
+        return static_cast<unsigned long>(fread(buf, 1, size, file));
+    return 0;
+}
+
+long FileStream::stell ()
+{
+    if (file)
+        return ftell(file);
+    return -1;
+}
+
+long FileStream::sseek (long offset, int origin)
+{
+    if (file)
+        return fseek(file, offset, origin);
+    return -1;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */