mirror of
https://github.com/libretro/snes9x.git
synced 2024-12-13 11:38:28 +00:00
91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
/*
|
|
Copyright (C) 2002 Andrea Mazzoleni ( http://advancemame.sf.net )
|
|
Copyright (C) 2001-4 Igor Pavlov ( http://www.7-zip.org )
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License version 2.1 as published by the Free Software Foundation.
|
|
|
|
This library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef __STREAM_WINDOWOUT_H
|
|
#define __STREAM_WINDOWOUT_H
|
|
|
|
#include "iiostrm.h"
|
|
|
|
namespace NStream {
|
|
namespace NWindow {
|
|
|
|
// m_KeepSizeBefore: how mach BYTEs must be in buffer before m_Pos;
|
|
// m_KeepSizeAfter: how mach BYTEs must be in buffer after m_Pos;
|
|
// m_KeepSizeReserv: how mach BYTEs must be in buffer for Moving Reserv;
|
|
// must be >= aKeepSizeAfter; // test it
|
|
|
|
class COut
|
|
{
|
|
BYTE *m_Buffer;
|
|
UINT32 m_Pos;
|
|
UINT32 m_PosLimit;
|
|
UINT32 m_KeepSizeBefore;
|
|
UINT32 m_KeepSizeAfter;
|
|
UINT32 m_KeepSizeReserv;
|
|
UINT32 m_StreamPos;
|
|
|
|
UINT32 m_WindowSize;
|
|
UINT32 m_MoveFrom;
|
|
|
|
ISequentialOutStream *m_Stream;
|
|
|
|
virtual void MoveBlockBackward();
|
|
public:
|
|
COut(): m_Buffer(0), m_Stream(0) {}
|
|
virtual ~COut();
|
|
void Create(UINT32 aKeepSizeBefore,
|
|
UINT32 aKeepSizeAfter, UINT32 aKeepSizeReserv = (1<<17));
|
|
void SetWindowSize(UINT32 aWindowSize);
|
|
|
|
void Init(ISequentialOutStream *aStream, bool aSolid = false);
|
|
HRESULT Flush();
|
|
|
|
UINT32 GetCurPos() const { return m_Pos; }
|
|
const BYTE *GetPointerToCurrentPos() const { return m_Buffer + m_Pos;};
|
|
|
|
void CopyBackBlock(UINT32 aDistance, UINT32 aLen)
|
|
{
|
|
if (m_Pos >= m_PosLimit)
|
|
MoveBlockBackward();
|
|
BYTE *p = m_Buffer + m_Pos;
|
|
aDistance++;
|
|
BYTE *p2 = p - aDistance;
|
|
for(UINT32 i = 0; i < aLen; i++)
|
|
p[i] = p2[i];
|
|
m_Pos += aLen;
|
|
}
|
|
|
|
void PutOneByte(BYTE aByte)
|
|
{
|
|
if (m_Pos >= m_PosLimit)
|
|
MoveBlockBackward();
|
|
m_Buffer[m_Pos++] = aByte;
|
|
}
|
|
|
|
BYTE GetOneByte(UINT32 anIndex) const
|
|
{
|
|
return m_Buffer[m_Pos + anIndex];
|
|
}
|
|
|
|
BYTE *GetBuffer() const { return m_Buffer; }
|
|
};
|
|
|
|
}}
|
|
|
|
#endif
|