Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 183 insertions, 0 deletions

diff --git a/include/systools/win32/comtools.hxx b/include/systools/win32/comtools.hxx
new file mode 100644
index 000000000..8f7ce87e7
--- /dev/null
+++ b/include/systools/win32/comtools.hxx
@@ -0,0 +1,183 @@
+/* -*- 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_SYSTOOLS_WIN32_COMTOOLS_HXX
+#define INCLUDED_SYSTOOLS_WIN32_COMTOOLS_HXX
+
+#include <string>
+#include <stdexcept>
+#include <objbase.h>
+
+namespace sal
+{
+namespace systools
+{
+    typedef int HRESULT;
+
+    /* Simple exception class for propagating COM errors */
+    class ComError : public std::runtime_error
+    {
+    public:
+        ComError(const std::string& message, HRESULT hr) :
+            std::runtime_error(message),
+            hr_(hr)
+        {}
+
+        HRESULT GetHresult() const
+        {
+            return hr_;
+        }
+
+    private:
+        HRESULT hr_;
+    };
+
+    /* A simple COM smart pointer template */
+    template <typename T>
+    class COMReference
+    {
+    public:
+        COMReference() :
+            com_ptr_(NULL)
+        {
+        }
+
+        explicit COMReference(T* comptr) :
+            com_ptr_(comptr)
+        {
+            addRef();
+        }
+
+        /* Explicitly controllable whether AddRef will be called or not */
+        COMReference(T* comptr, bool bAddRef) :
+            com_ptr_(comptr)
+        {
+            if (bAddRef)
+                addRef();
+        }
+
+        COMReference(const COMReference<T>& other) :
+            com_ptr_(other.com_ptr_)
+        {
+            addRef();
+        }
+
+        COMReference<T>& operator=(const COMReference<T>& other)
+        {
+            if (other.com_ptr_)
+                other.com_ptr_->AddRef();
+            release();
+            com_ptr_ = other.com_ptr_;
+            return *this;
+        }
+
+        COMReference<T>& operator=(T* comptr)
+        {
+            release();
+            com_ptr_ = comptr;
+            addRef();
+            return *this;
+        }
+
+        ~COMReference()
+        {
+            release();
+        }
+
+        template<typename InterfaceType>
+        COMReference<InterfaceType> QueryInterface(REFIID iid)
+        {
+            COMReference<InterfaceType> ip;
+            HRESULT hr = E_FAIL;
+            if (com_ptr_)
+                hr = com_ptr_->QueryInterface(iid, reinterpret_cast<LPVOID*>(&ip));
+
+            if (FAILED(hr))
+                throw ComError("QueryInterface failed: Interface not supported!", hr);
+
+            return ip;
+        }
+
+        T* operator->() const
+        {
+            return com_ptr_;
+        }
+
+        T& operator*() const
+        {
+            return *com_ptr_;
+        }
+
+        /* Necessary for assigning com_ptr_ from functions like
+           CoCreateInstance which require a 'void**' */
+        T** operator&()
+        {
+            release();
+            com_ptr_ = NULL;
+            return &com_ptr_;
+        }
+
+        T* get() const
+        {
+            return com_ptr_;
+        }
+
+        COMReference<T>& clear()
+        {
+            release();
+            com_ptr_ = NULL;
+            return *this;
+        }
+
+        bool is() const
+        {
+            return (com_ptr_ != NULL);
+        }
+
+    private:
+        ULONG addRef()
+        {
+            ULONG cnt = 0;
+            if (com_ptr_)
+                cnt = com_ptr_->AddRef();
+            return cnt;
+        }
+
+        ULONG release()
+        {
+            ULONG cnt = 0;
+            if (com_ptr_)
+                cnt = com_ptr_->Release();
+            return cnt;
+        }
+
+    private:
+        T* com_ptr_;
+    };
+
+} // systools
+} // sal
+
+/* Typedefs for some popular COM interfaces */
+typedef sal::systools::COMReference<IDataObject> IDataObjectPtr;
+typedef sal::systools::COMReference<IStream> IStreamPtr;
+
+#endif // INCLUDED_SYSTOOLS_WIN32_COMTOOLS_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */