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/*
* barrier -- mouse and keyboard sharing utility
* Copyright (C) 2012-2016 Symless Ltd.
* Copyright (C) 2002 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file LICENSE that should have accompanied this file.
*
* This package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "base/EventTypes.h"
#include "common/stdlist.h"
#include "common/stdvector.h"
//! FIFO of bytes
/*!
This class maintains a FIFO (first-in, last-out) buffer of bytes.
*/
class StreamBuffer {
public:
StreamBuffer();
~StreamBuffer();
//! @name manipulators
//@{
//! Read data without removing from buffer
/*!
Return a pointer to memory with the next \c n bytes in the buffer
(which must be <= getSize()). The caller must not modify the returned
memory nor delete it.
*/
const void* peek(UInt32 n);
//! Discard data
/*!
Discards the next \c n bytes. If \c n >= getSize() then the buffer
is cleared.
*/
void pop(UInt32 n);
//! Write data to buffer
/*!
Appends \c n bytes from \c data to the buffer.
*/
void write(const void* data, UInt32 n);
//@}
//! @name accessors
//@{
//! Get size of buffer
/*!
Returns the number of bytes in the buffer.
*/
UInt32 getSize() const;
//@}
private:
static const UInt32 kChunkSize;
typedef std::vector<UInt8> Chunk;
typedef std::list<Chunk> ChunkList;
ChunkList m_chunks;
UInt32 m_size;
UInt32 m_headUsed;
};
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