1 files changed, 162 insertions, 0 deletions
diff --git a/include/svl/sharedstring.hxx b/include/svl/sharedstring.hxx
new file mode 100644
index 0000000000..09261dd5ad
--- /dev/null
+++ b/include/svl/sharedstring.hxx
@@ -0,0 +1,162 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_SVL_SHAREDSTRING_HXX
+#define INCLUDED_SVL_SHAREDSTRING_HXX
+
+#include <svl/svldllapi.h>
+#include <rtl/ustring.hxx>
+
+#include <utility>
+
+namespace svl {
+
+class SVL_DLLPUBLIC SharedString
+{
+    rtl_uString* mpData = nullptr;
+    rtl_uString* mpDataIgnoreCase = nullptr;
+public:
+
+    static const SharedString & getEmptyString();
+    static const OUString EMPTY_STRING;
+
+    SharedString() = default;
+    SharedString( rtl_uString* pData, rtl_uString* pDataIgnoreCase );
+    explicit SharedString( const OUString& rStr );
+    SharedString( const SharedString& r );
+    SharedString(SharedString&& r) noexcept;
+    ~SharedString();
+
+    SharedString& operator= ( const SharedString& r );
+    SharedString& operator=(SharedString&& r) noexcept;
+
+    bool operator== ( const SharedString& r ) const;
+    bool operator!= ( const SharedString& r ) const;
+
+    const OUString & getString() const;
+    const OUString & getIgnoreCaseString() const;
+
+    rtl_uString* getData();
+    const rtl_uString* getData() const;
+
+    rtl_uString* getDataIgnoreCase();
+    const rtl_uString* getDataIgnoreCase() const;
+
+    bool isValid() const;
+    bool isEmpty() const;
+
+    sal_Int32 getLength() const;
+};
+
+inline SharedString::SharedString( rtl_uString* pData, rtl_uString* pDataIgnoreCase ) :
+    mpData(pData), mpDataIgnoreCase(pDataIgnoreCase)
+{
+    if (mpData)
+        rtl_uString_acquire(mpData);
+    if (mpDataIgnoreCase)
+        rtl_uString_acquire(mpDataIgnoreCase);
+}
+
+inline SharedString::SharedString( const OUString& rStr ) : mpData(rStr.pData)
+{
+    rtl_uString_acquire(mpData);
+}
+
+inline SharedString::SharedString( const SharedString& r ) : mpData(r.mpData), mpDataIgnoreCase(r.mpDataIgnoreCase)
+{
+    if (mpData)
+        rtl_uString_acquire(mpData);
+    if (mpDataIgnoreCase)
+        rtl_uString_acquire(mpDataIgnoreCase);
+}
+
+inline SharedString::SharedString(SharedString&& r) noexcept
+    : mpData(std::exchange(r.mpData, nullptr))
+    , mpDataIgnoreCase(std::exchange(r.mpDataIgnoreCase, nullptr))
+{
+}
+
+inline SharedString::~SharedString()
+{
+    if (mpData)
+        rtl_uString_release(mpData);
+    if (mpDataIgnoreCase)
+        rtl_uString_release(mpDataIgnoreCase);
+}
+
+inline SharedString& SharedString::operator=(SharedString&& r) noexcept
+{
+    // Having this inline helps Calc's mdds::multi_type_vector to do some operations
+    // much faster.
+    if (mpData)
+        rtl_uString_release(mpData);
+    if (mpDataIgnoreCase)
+        rtl_uString_release(mpDataIgnoreCase);
+
+    mpData = std::exchange(r.mpData, nullptr);
+    mpDataIgnoreCase = std::exchange(r.mpDataIgnoreCase, nullptr);
+
+    return *this;
+}
+
+inline bool SharedString::operator!= ( const SharedString& r ) const
+{
+    return !operator== (r);
+}
+
+inline const OUString & SharedString::getString() const
+{
+    return mpData ? OUString::unacquired(&mpData) : EMPTY_STRING;
+}
+
+inline const OUString & SharedString::getIgnoreCaseString() const
+{
+    return mpDataIgnoreCase ? OUString::unacquired(&mpDataIgnoreCase) : EMPTY_STRING;
+}
+
+inline rtl_uString* SharedString::getData()
+{
+    return mpData;
+}
+
+inline const rtl_uString* SharedString::getData() const
+{
+    return mpData;
+}
+
+inline rtl_uString* SharedString::getDataIgnoreCase()
+{
+    return mpDataIgnoreCase;
+}
+
+inline const rtl_uString* SharedString::getDataIgnoreCase() const
+{
+    return mpDataIgnoreCase;
+}
+
+inline bool SharedString::isValid() const
+{
+    return mpData != nullptr;
+}
+
+inline bool SharedString::isEmpty() const
+{
+    return mpData == nullptr || mpData->length == 0;
+}
+
+inline sal_Int32 SharedString::getLength() const
+{
+    return mpData ? mpData->length : 0;
+}
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */