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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_BSTREAM_HXX
#define CSV_BSTREAM_HXX
#include <string.h>
#include <cosv/string.hxx>
namespace csv
{
enum seek_dir
{
beg = 0,
cur = 1,
end = 2
};
class bistream
{
public:
// LIFECYCLE
virtual ~bistream() {}
// OPERATIONS
/// @return Number of actually read bytes.
uintt read(
void * out_pDest,
uintt i_nNrofBytes);
// INQUIRY
/** @return True, if already one try to read had failed.
There is no guarantee, that it returns true, if end of data
is just reached.
Though it will return false, if there is still somemething
to read.
*/
bool eod() const;
private:
virtual uintt do_read(
void * out_pDest,
uintt i_nNrofBytes) = 0;
virtual bool inq_eod() const = 0;
};
class bostream
{
public:
// LIFECYCLE
virtual ~bostream() {}
// OPERATIONS
/// @return Number of actually written bytes.
uintt write(
const void * i_pSrc,
uintt i_nNrofBytes);
/// @return Number of actually written bytes.
uintt write(
const char * i_pSrc );
/// @return Number of actually written bytes.
uintt write(
const String & i_pSrc );
private:
virtual uintt do_write(
const void * i_pSrc,
uintt i_nNrofBytes) = 0;
};
class bstream : public bistream,
public bostream
{
public:
uintt seek(
intt i_nDistanceFromBegin,
seek_dir i_eStartPoint = ::csv::beg );
uintt position() const;
private:
virtual uintt do_seek(
intt i_nDistance,
seek_dir i_eStartPoint = ::csv::beg ) = 0;
virtual uintt inq_position() const = 0;
};
// IMPLEMENTATION
inline uintt
bistream::read( void * o_pDest,
uintt i_nNrofBytes)
{ return do_read(o_pDest, i_nNrofBytes); }
inline bool
bistream::eod() const
{ return inq_eod(); }
inline uintt
bostream::write( const void * i_pSrc,
uintt i_nNrofBytes)
{ return do_write( i_pSrc, i_nNrofBytes ); }
inline uintt
bostream::write( const char * i_sSrc )
{ return write( i_sSrc, strlen(i_sSrc) ); }
inline uintt
bostream::write( const String & i_sSrc )
{ return write( i_sSrc.c_str(), i_sSrc.length() ); }
inline uintt
bstream::seek( intt i_nDistance,
seek_dir i_eStartPoint )
{ return do_seek( i_nDistance, i_eStartPoint ); }
inline uintt
bstream::position() const
{ return inq_position(); }
} // namespace csv
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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