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This commit is contained in:
Igor Pavlov
2005-05-30 00:00:00 +00:00
committed by Kornel Lesiński
parent 8c1b5c7b7e
commit 3c510ba80b
926 changed files with 40559 additions and 23519 deletions
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47
7zip/Common/MSBFEncoder.h
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@@ -1,13 +1,11 @@
// Stream/MSBFEncoder.h
// the Most Significant Bit of byte is First
#pragma once
#ifndef __STREAM_MSBFENCODER_H
#define __STREAM_MSBFENCODER_H
#include "Common/Defs.h"
#include "Interface/IInOutStreams.h"
#include "../IStream.h"
#include "OutBuffer.h"
namespace NStream {
namespace NMSBF {
@@ -16,12 +14,15 @@ template<class TOutByte>
class CEncoder
{
TOutByte m_Stream;
UINT32 m_BitPos;
BYTE m_CurByte;
int m_BitPos;
Byte m_CurByte;
public:
void Init(ISequentialOutStream *aStream)
bool Create(UInt32 bufferSize) { return m_Stream.Create(bufferSize); }
void SetStream(ISequentialOutStream *outStream) { m_Stream.SetStream(outStream);}
void ReleaseStream() { m_Stream.ReleaseStream(); }
void Init()
{
m_Stream.Init(aStream);
m_Stream.Init();
m_BitPos = 8;
m_CurByte = 0;
}
@@ -32,26 +33,19 @@ public:
return m_Stream.Flush();
}
void ReleaseStream()
void WriteBits(UInt32 value, int numBits)
{
m_Stream.ReleaseStream();
}
void WriteBits(UINT32 aValue, UINT32 aNumBits)
{
while(aNumBits > 0)
while(numBits > 0)
{
UINT32 aNumNewBits = MyMin(aNumBits, m_BitPos);
aNumBits -= aNumNewBits;
int numNewBits = MyMin(numBits, m_BitPos);
numBits -= numNewBits;
m_CurByte <<= numNewBits;
UInt32 newBits = value >> numBits;
m_CurByte |= Byte(newBits);
value -= (newBits << numBits);
m_CurByte <<= aNumNewBits;
UINT32 aNewBits = aValue >> aNumBits;
m_CurByte |= BYTE(aNewBits);
aValue -= (aNewBits << aNumBits);
m_BitPos -= aNumNewBits;
m_BitPos -= numNewBits;
if (m_BitPos == 0)
{
@@ -60,11 +54,10 @@ public:
}
}
}
UINT64 GetProcessedSize() const {
return m_Stream.GetProcessedSize() + (8 - m_BitPos + 7) /8; }
UInt64 GetProcessedSize() const {
return m_Stream.GetProcessedSize() + (8 - m_BitPos + 7) / 8; }
};
}}
#endif