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This commit is contained in:
Igor Pavlov
2014-11-23 00:00:00 +00:00
committed by Kornel Lesiński
parent 83f8ddcc5b
commit f08f4dcc3c
1158 changed files with 76451 additions and 35082 deletions
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26
CPP/7zip/Compress/RangeCoder.h Executable file → Normal file
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@@ -1,5 +1,5 @@
// Compress/RangeCoder.h
// 2009-05-30 : Igor Pavlov : Public domain
// 2013-01-10 : Igor Pavlov : Public domain
#ifndef __COMPRESS_RANGE_CODER_H
#define __COMPRESS_RANGE_CODER_H
@@ -10,7 +10,7 @@
namespace NCompress {
namespace NRangeCoder {
const int kNumTopBits = 24;
const unsigned kNumTopBits = 24;
const UInt32 kTopValue = (1 << kNumTopBits);
class CEncoder
@@ -21,7 +21,7 @@ public:
UInt64 Low;
UInt32 Range;
COutBuffer Stream;
bool Create(UInt32 bufferSize) { return Stream.Create(bufferSize); }
bool Create(UInt32 bufSize) { return Stream.Create(bufSize); }
void SetStream(ISequentialOutStream *stream) { Stream.SetStream(stream); }
void Init()
@@ -36,14 +36,12 @@ public:
void FlushData()
{
// Low += 1;
for(int i = 0; i < 5; i++)
for (int i = 0; i < 5; i++)
ShiftLow();
}
HRESULT FlushStream() { return Stream.Flush(); }
void ReleaseStream() { Stream.ReleaseStream(); }
void Encode(UInt32 start, UInt32 size, UInt32 total)
{
Low += start * (Range /= total);
@@ -57,7 +55,7 @@ public:
void ShiftLow()
{
if ((UInt32)Low < (UInt32)0xFF000000 || (int)(Low >> 32) != 0)
if ((UInt32)Low < (UInt32)0xFF000000 || (unsigned)(Low >> 32) != 0)
{
Byte temp = _cache;
do
@@ -65,7 +63,7 @@ public:
Stream.WriteByte((Byte)(temp + (Byte)(Low >> 32)));
temp = 0xFF;
}
while(--_cacheSize != 0);
while (--_cacheSize != 0);
_cache = (Byte)((UInt32)Low >> 24);
}
_cacheSize++;
@@ -103,7 +101,7 @@ public:
}
}
UInt64 GetProcessedSize() { return Stream.GetProcessedSize() + _cacheSize + 4; }
UInt64 GetProcessedSize() { return Stream.GetProcessedSize() + _cacheSize + 4; }
};
class CDecoder
@@ -112,7 +110,7 @@ public:
CInBuffer Stream;
UInt32 Range;
UInt32 Code;
bool Create(UInt32 bufferSize) { return Stream.Create(bufferSize); }
bool Create(UInt32 bufSize) { return Stream.Create(bufSize); }
void Normalize()
{
@@ -129,15 +127,13 @@ public:
Stream.Init();
Code = 0;
Range = 0xFFFFFFFF;
for(int i = 0; i < 5; i++)
for (int i = 0; i < 5; i++)
Code = (Code << 8) | Stream.ReadByte();
}
void ReleaseStream() { Stream.ReleaseStream(); }
UInt32 GetThreshold(UInt32 total)
{
return (Code) / ( Range /= total);
return (Code) / (Range /= total);
}
void Decode(UInt32 start, UInt32 size)
@@ -197,7 +193,7 @@ public:
return symbol;
}
UInt64 GetProcessedSize() {return Stream.GetProcessedSize(); }
UInt64 GetProcessedSize() { return Stream.GetProcessedSize(); }
};
}}