1 files changed, 138 insertions, 0 deletions
diff --git a/connectivity/source/drivers/mysqlc/mysqlc_subcomponent.hxx b/connectivity/source/drivers/mysqlc/mysqlc_subcomponent.hxx
new file mode 100644
index 000000000..edba70a93
--- /dev/null
+++ b/connectivity/source/drivers/mysqlc/mysqlc_subcomponent.hxx
@@ -0,0 +1,138 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <cppuhelper/propshlp.hxx>
+#include <osl/diagnose.h>
+#include <osl/mutex.hxx>
+
+namespace cppu
+{
+class IPropertyArrayHelper;
+}
+namespace com::sun::star::lang
+{
+class XComponent;
+}
+
+namespace connectivity::mysqlc
+{
+/// @throws css::lang::DisposedException
+void checkDisposed(bool _bThrow);
+
+template <class TYPE> class OPropertyArrayUsageHelper
+{
+protected:
+    static sal_Int32 s_nRefCount;
+    static ::cppu::IPropertyArrayHelper* s_pProps;
+    static ::osl::Mutex s_aMutex;
+
+public:
+    OPropertyArrayUsageHelper();
+    virtual ~OPropertyArrayUsageHelper();
+
+    /** call this in the getInfoHelper method of your derived class. The method returns the array helper of the
+                class, which is created if necessary.
+            */
+    ::cppu::IPropertyArrayHelper* getArrayHelper();
+
+protected:
+    /** used to implement the creation of the array helper which is shared amongst all instances of the class.
+                This method needs to be implemented in derived classes.
+                <BR>
+                The method gets called with s_aMutex acquired.
+                @return                         a pointer to the newly created array helper. Must not be NULL.
+            */
+    virtual ::cppu::IPropertyArrayHelper* createArrayHelper() const = 0;
+};
+
+template <class TYPE> sal_Int32 OPropertyArrayUsageHelper<TYPE>::s_nRefCount = 0;
+
+template <class TYPE>
+::cppu::IPropertyArrayHelper* OPropertyArrayUsageHelper<TYPE>::s_pProps = nullptr;
+
+template <class TYPE>::osl::Mutex OPropertyArrayUsageHelper<TYPE>::s_aMutex;
+
+template <class TYPE> OPropertyArrayUsageHelper<TYPE>::OPropertyArrayUsageHelper()
+{
+    ::osl::MutexGuard aGuard(s_aMutex);
+    ++s_nRefCount;
+}
+
+template <class TYPE> OPropertyArrayUsageHelper<TYPE>::~OPropertyArrayUsageHelper()
+{
+    ::osl::MutexGuard aGuard(s_aMutex);
+    OSL_ENSURE(s_nRefCount > 0, "OPropertyArrayUsageHelper::~OPropertyArrayUsageHelper : "
+                                "suspicious call : have a refcount of 0 !");
+    if (!--s_nRefCount)
+    {
+        delete s_pProps;
+        s_pProps = nullptr;
+    }
+}
+
+template <class TYPE>::cppu::IPropertyArrayHelper* OPropertyArrayUsageHelper<TYPE>::getArrayHelper()
+{
+    OSL_ENSURE(
+        s_nRefCount,
+        "OPropertyArrayUsageHelper::getArrayHelper : suspicious call : have a refcount of 0 !");
+    if (!s_pProps)
+    {
+        ::osl::MutexGuard aGuard(s_aMutex);
+        if (!s_pProps)
+        {
+            s_pProps = createArrayHelper();
+            OSL_ENSURE(s_pProps, "OPropertyArrayUsageHelper::getArrayHelper : createArrayHelper "
+                                 "returned nonsense !");
+        }
+    }
+    return s_pProps;
+}
+
+namespace internal
+{
+template <class T> void implCopySequence(const T* _pSource, T*& _pDest, sal_Int32 _nSourceLen)
+{
+    for (sal_Int32 i = 0; i < _nSourceLen; ++i, ++_pSource, ++_pDest)
+        *_pDest = *_pSource;
+}
+}
+
+/// concat two sequences
+template <class T>
+css::uno::Sequence<T> concatSequences(const css::uno::Sequence<T>& _rLeft,
+                                      const css::uno::Sequence<T>& _rRight)
+{
+    sal_Int32 nLeft(_rLeft.getLength()), nRight(_rRight.getLength());
+    const T* pLeft = _rLeft.getConstArray();
+    const T* pRight = _rRight.getConstArray();
+
+    sal_Int32 nReturnLen(nLeft + nRight);
+    css::uno::Sequence<T> aReturn(nReturnLen);
+    T* pReturn = aReturn.getArray();
+
+    internal::implCopySequence(pLeft, pReturn, nLeft);
+    internal::implCopySequence(pRight, pReturn, nRight);
+
+    return aReturn;
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */