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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: */
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