1 files changed, 137 insertions, 0 deletions
diff --git a/include/cosv/openclose.hxx b/include/cosv/openclose.hxx
new file mode 100644
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+++ b/include/cosv/openclose.hxx
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+/* -*- 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 CSV_OPENCLOSE_HXX
+#define CSV_OPENCLOSE_HXX
+
+
+namespace csv
+{
+
+// Open modes for storages:
+enum E_RWMode
+{
+    rwDefault   = 0x0000,       //  Keep old settings. If there are none, set default.
+    rwRead      = 0x0001,       //  Reads only
+    rwWrite     = 0x0002,       //  Writes only
+    rwReadWrite = 0x0003        //  Reads and writes.
+};
+
+enum E_OpenMode
+{
+    omCreateIfNecessary     = 0x0000,   // Creates a new file only, if file does not exist.
+    omCreateNot             = 0x0010,   // Open fails, if file does not exist.
+    omCreate                = 0x0020    // Existing file will be deleted.
+};
+enum E_ShareMode
+{
+    shmShareNot     = 0x0000,       // Allow others nothing
+    shmShareRead    = 0x0004,       // Allow others to read
+    shmShareAll     = 0x000C        // Allow others to read and write
+};
+
+/** Constants for filemode combinations
+    These combinations are the only ones, guaranteed to be supported.
+*/
+const UINT32    CFM_RW      = rwReadWrite;
+const UINT32    CFM_CREATE  =
+    static_cast< UINT32 >(rwReadWrite) | static_cast< UINT32 >(omCreate);
+const UINT32    CFM_READ    =
+    static_cast< UINT32 >(rwRead) | static_cast< UINT32 >(omCreateNot) |
+    static_cast< UINT32 >(shmShareRead);
+
+
+
+class OpenClose
+{
+  public:
+    virtual ~OpenClose() {}
+
+    bool                open(
+                            UINT32          in_nOpenModeInfo = 0 ); /// Combination of values of E_RWMode and E_ShareMode und E_OpenMode. 0 := Keep existing mode.
+    void                close();
+
+    bool                is_open() const;
+
+  private:
+    virtual bool        do_open(
+                            UINT32          in_nOpenModeInfo ) = 0;
+    virtual void        do_close() = 0;
+    virtual bool        inq_is_open() const = 0;
+};
+
+
+
+class OpenCloseGuard
+{
+  public:
+                        OpenCloseGuard(
+                            OpenClose &         i_rOpenClose,
+                            UINT32              i_nOpenModeInfo = 0 );
+                        ~OpenCloseGuard();
+                        operator bool() const;
+
+  private:
+    // Forbidden:
+                        OpenCloseGuard(OpenCloseGuard&);
+    OpenCloseGuard &    operator=(OpenCloseGuard&);
+
+    // DATA
+    OpenClose &         rOpenClose;
+};
+
+
+// IMPLEMENTATION
+
+inline bool
+OpenClose::open( UINT32 i_nOpenModeInfo )
+    { return do_open(i_nOpenModeInfo); }
+inline void
+OpenClose::close()
+    { do_close(); }
+inline bool
+OpenClose::is_open() const
+    { return inq_is_open(); }
+
+inline
+OpenCloseGuard::OpenCloseGuard( OpenClose & i_rOpenClose,
+                                UINT32      i_nOpenModeInfo )
+    :   rOpenClose(i_rOpenClose)
+    { rOpenClose.open(i_nOpenModeInfo); }
+inline
+OpenCloseGuard::~OpenCloseGuard()
+    { if (rOpenClose.is_open()) rOpenClose.close(); }
+inline
+OpenCloseGuard::operator bool() const
+    { return rOpenClose.is_open(); }
+
+
+
+
+}   // namespace csv
+
+
+
+
+
+
+#endif
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */