Added 7-zip SDK to project
This commit is contained in:
parent
2d2c473c21
commit
a85b565ac9
|
|
@ -0,0 +1,55 @@
|
|||
// Common/CRC.cs
|
||||
|
||||
namespace SevenZip
|
||||
{
|
||||
class CRC
|
||||
{
|
||||
public static readonly uint[] Table;
|
||||
|
||||
static CRC()
|
||||
{
|
||||
Table = new uint[256];
|
||||
const uint kPoly = 0xEDB88320;
|
||||
for (uint i = 0; i < 256; i++)
|
||||
{
|
||||
uint r = i;
|
||||
for (int j = 0; j < 8; j++)
|
||||
if ((r & 1) != 0)
|
||||
r = (r >> 1) ^ kPoly;
|
||||
else
|
||||
r >>= 1;
|
||||
Table[i] = r;
|
||||
}
|
||||
}
|
||||
|
||||
uint _value = 0xFFFFFFFF;
|
||||
|
||||
public void Init() { _value = 0xFFFFFFFF; }
|
||||
|
||||
public void UpdateByte(byte b)
|
||||
{
|
||||
_value = Table[(((byte)(_value)) ^ b)] ^ (_value >> 8);
|
||||
}
|
||||
|
||||
public void Update(byte[] data, uint offset, uint size)
|
||||
{
|
||||
for (uint i = 0; i < size; i++)
|
||||
_value = Table[(((byte)(_value)) ^ data[offset + i])] ^ (_value >> 8);
|
||||
}
|
||||
|
||||
public uint GetDigest() { return _value ^ 0xFFFFFFFF; }
|
||||
|
||||
static uint CalculateDigest(byte[] data, uint offset, uint size)
|
||||
{
|
||||
CRC crc = new CRC();
|
||||
// crc.Init();
|
||||
crc.Update(data, offset, size);
|
||||
return crc.GetDigest();
|
||||
}
|
||||
|
||||
static bool VerifyDigest(uint digest, byte[] data, uint offset, uint size)
|
||||
{
|
||||
return (CalculateDigest(data, offset, size) == digest);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,274 @@
|
|||
// CommandLineParser.cs
|
||||
|
||||
using System;
|
||||
using System.Collections;
|
||||
|
||||
namespace SevenZip.CommandLineParser
|
||||
{
|
||||
public enum SwitchType
|
||||
{
|
||||
Simple,
|
||||
PostMinus,
|
||||
LimitedPostString,
|
||||
UnLimitedPostString,
|
||||
PostChar
|
||||
}
|
||||
|
||||
public class SwitchForm
|
||||
{
|
||||
public string IDString;
|
||||
public SwitchType Type;
|
||||
public bool Multi;
|
||||
public int MinLen;
|
||||
public int MaxLen;
|
||||
public string PostCharSet;
|
||||
|
||||
public SwitchForm(string idString, SwitchType type, bool multi,
|
||||
int minLen, int maxLen, string postCharSet)
|
||||
{
|
||||
IDString = idString;
|
||||
Type = type;
|
||||
Multi = multi;
|
||||
MinLen = minLen;
|
||||
MaxLen = maxLen;
|
||||
PostCharSet = postCharSet;
|
||||
}
|
||||
public SwitchForm(string idString, SwitchType type, bool multi, int minLen):
|
||||
this(idString, type, multi, minLen, 0, "")
|
||||
{
|
||||
}
|
||||
public SwitchForm(string idString, SwitchType type, bool multi):
|
||||
this(idString, type, multi, 0)
|
||||
{
|
||||
}
|
||||
}
|
||||
|
||||
public class SwitchResult
|
||||
{
|
||||
public bool ThereIs;
|
||||
public bool WithMinus;
|
||||
public ArrayList PostStrings = new ArrayList();
|
||||
public int PostCharIndex;
|
||||
public SwitchResult()
|
||||
{
|
||||
ThereIs = false;
|
||||
}
|
||||
}
|
||||
|
||||
public class Parser
|
||||
{
|
||||
public ArrayList NonSwitchStrings = new ArrayList();
|
||||
SwitchResult[] _switches;
|
||||
|
||||
public Parser(int numSwitches)
|
||||
{
|
||||
_switches = new SwitchResult[numSwitches];
|
||||
for (int i = 0; i < numSwitches; i++)
|
||||
_switches[i] = new SwitchResult();
|
||||
}
|
||||
|
||||
bool ParseString(string srcString, SwitchForm[] switchForms)
|
||||
{
|
||||
int len = srcString.Length;
|
||||
if (len == 0)
|
||||
return false;
|
||||
int pos = 0;
|
||||
if (!IsItSwitchChar(srcString[pos]))
|
||||
return false;
|
||||
while (pos < len)
|
||||
{
|
||||
if (IsItSwitchChar(srcString[pos]))
|
||||
pos++;
|
||||
const int kNoLen = -1;
|
||||
int matchedSwitchIndex = 0;
|
||||
int maxLen = kNoLen;
|
||||
for (int switchIndex = 0; switchIndex < _switches.Length; switchIndex++)
|
||||
{
|
||||
int switchLen = switchForms[switchIndex].IDString.Length;
|
||||
if (switchLen <= maxLen || pos + switchLen > len)
|
||||
continue;
|
||||
if (String.Compare(switchForms[switchIndex].IDString, 0,
|
||||
srcString, pos, switchLen, true) == 0)
|
||||
{
|
||||
matchedSwitchIndex = switchIndex;
|
||||
maxLen = switchLen;
|
||||
}
|
||||
}
|
||||
if (maxLen == kNoLen)
|
||||
throw new Exception("maxLen == kNoLen");
|
||||
SwitchResult matchedSwitch = _switches[matchedSwitchIndex];
|
||||
SwitchForm switchForm = switchForms[matchedSwitchIndex];
|
||||
if ((!switchForm.Multi) && matchedSwitch.ThereIs)
|
||||
throw new Exception("switch must be single");
|
||||
matchedSwitch.ThereIs = true;
|
||||
pos += maxLen;
|
||||
int tailSize = len - pos;
|
||||
SwitchType type = switchForm.Type;
|
||||
switch (type)
|
||||
{
|
||||
case SwitchType.PostMinus:
|
||||
{
|
||||
if (tailSize == 0)
|
||||
matchedSwitch.WithMinus = false;
|
||||
else
|
||||
{
|
||||
matchedSwitch.WithMinus = (srcString[pos] == kSwitchMinus);
|
||||
if (matchedSwitch.WithMinus)
|
||||
pos++;
|
||||
}
|
||||
break;
|
||||
}
|
||||
case SwitchType.PostChar:
|
||||
{
|
||||
if (tailSize < switchForm.MinLen)
|
||||
throw new Exception("switch is not full");
|
||||
string charSet = switchForm.PostCharSet;
|
||||
const int kEmptyCharValue = -1;
|
||||
if (tailSize == 0)
|
||||
matchedSwitch.PostCharIndex = kEmptyCharValue;
|
||||
else
|
||||
{
|
||||
int index = charSet.IndexOf(srcString[pos]);
|
||||
if (index < 0)
|
||||
matchedSwitch.PostCharIndex = kEmptyCharValue;
|
||||
else
|
||||
{
|
||||
matchedSwitch.PostCharIndex = index;
|
||||
pos++;
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
case SwitchType.LimitedPostString:
|
||||
case SwitchType.UnLimitedPostString:
|
||||
{
|
||||
int minLen = switchForm.MinLen;
|
||||
if (tailSize < minLen)
|
||||
throw new Exception("switch is not full");
|
||||
if (type == SwitchType.UnLimitedPostString)
|
||||
{
|
||||
matchedSwitch.PostStrings.Add(srcString.Substring(pos));
|
||||
return true;
|
||||
}
|
||||
String stringSwitch = srcString.Substring(pos, minLen);
|
||||
pos += minLen;
|
||||
for (int i = minLen; i < switchForm.MaxLen && pos < len; i++, pos++)
|
||||
{
|
||||
char c = srcString[pos];
|
||||
if (IsItSwitchChar(c))
|
||||
break;
|
||||
stringSwitch += c;
|
||||
}
|
||||
matchedSwitch.PostStrings.Add(stringSwitch);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
return true;
|
||||
|
||||
}
|
||||
|
||||
public void ParseStrings(SwitchForm[] switchForms, string[] commandStrings)
|
||||
{
|
||||
int numCommandStrings = commandStrings.Length;
|
||||
bool stopSwitch = false;
|
||||
for (int i = 0; i < numCommandStrings; i++)
|
||||
{
|
||||
string s = commandStrings[i];
|
||||
if (stopSwitch)
|
||||
NonSwitchStrings.Add(s);
|
||||
else
|
||||
if (s == kStopSwitchParsing)
|
||||
stopSwitch = true;
|
||||
else
|
||||
if (!ParseString(s, switchForms))
|
||||
NonSwitchStrings.Add(s);
|
||||
}
|
||||
}
|
||||
|
||||
public SwitchResult this[int index] { get { return _switches[index]; } }
|
||||
|
||||
public static int ParseCommand(CommandForm[] commandForms, string commandString,
|
||||
out string postString)
|
||||
{
|
||||
for (int i = 0; i < commandForms.Length; i++)
|
||||
{
|
||||
string id = commandForms[i].IDString;
|
||||
if (commandForms[i].PostStringMode)
|
||||
{
|
||||
if (commandString.IndexOf(id) == 0)
|
||||
{
|
||||
postString = commandString.Substring(id.Length);
|
||||
return i;
|
||||
}
|
||||
}
|
||||
else
|
||||
if (commandString == id)
|
||||
{
|
||||
postString = "";
|
||||
return i;
|
||||
}
|
||||
}
|
||||
postString = "";
|
||||
return -1;
|
||||
}
|
||||
|
||||
static bool ParseSubCharsCommand(int numForms, CommandSubCharsSet[] forms,
|
||||
string commandString, ArrayList indices)
|
||||
{
|
||||
indices.Clear();
|
||||
int numUsedChars = 0;
|
||||
for (int i = 0; i < numForms; i++)
|
||||
{
|
||||
CommandSubCharsSet charsSet = forms[i];
|
||||
int currentIndex = -1;
|
||||
int len = charsSet.Chars.Length;
|
||||
for (int j = 0; j < len; j++)
|
||||
{
|
||||
char c = charsSet.Chars[j];
|
||||
int newIndex = commandString.IndexOf(c);
|
||||
if (newIndex >= 0)
|
||||
{
|
||||
if (currentIndex >= 0)
|
||||
return false;
|
||||
if (commandString.IndexOf(c, newIndex + 1) >= 0)
|
||||
return false;
|
||||
currentIndex = j;
|
||||
numUsedChars++;
|
||||
}
|
||||
}
|
||||
if (currentIndex == -1 && !charsSet.EmptyAllowed)
|
||||
return false;
|
||||
indices.Add(currentIndex);
|
||||
}
|
||||
return (numUsedChars == commandString.Length);
|
||||
}
|
||||
const char kSwitchID1 = '-';
|
||||
const char kSwitchID2 = '/';
|
||||
|
||||
const char kSwitchMinus = '-';
|
||||
const string kStopSwitchParsing = "--";
|
||||
|
||||
static bool IsItSwitchChar(char c)
|
||||
{
|
||||
return (c == kSwitchID1 || c == kSwitchID2);
|
||||
}
|
||||
}
|
||||
|
||||
public class CommandForm
|
||||
{
|
||||
public string IDString = "";
|
||||
public bool PostStringMode = false;
|
||||
public CommandForm(string idString, bool postStringMode)
|
||||
{
|
||||
IDString = idString;
|
||||
PostStringMode = postStringMode;
|
||||
}
|
||||
}
|
||||
|
||||
class CommandSubCharsSet
|
||||
{
|
||||
public string Chars = "";
|
||||
public bool EmptyAllowed = false;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,157 @@
|
|||
// ICoder.h
|
||||
|
||||
using System;
|
||||
|
||||
namespace SevenZip
|
||||
{
|
||||
/// <summary>
|
||||
/// The exception that is thrown when an error in input stream occurs during decoding.
|
||||
/// </summary>
|
||||
class DataErrorException : ApplicationException
|
||||
{
|
||||
public DataErrorException(): base("Data Error") { }
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// The exception that is thrown when the value of an argument is outside the allowable range.
|
||||
/// </summary>
|
||||
class InvalidParamException : ApplicationException
|
||||
{
|
||||
public InvalidParamException(): base("Invalid Parameter") { }
|
||||
}
|
||||
|
||||
public interface ICodeProgress
|
||||
{
|
||||
/// <summary>
|
||||
/// Callback progress.
|
||||
/// </summary>
|
||||
/// <param name="inSize">
|
||||
/// input size. -1 if unknown.
|
||||
/// </param>
|
||||
/// <param name="outSize">
|
||||
/// output size. -1 if unknown.
|
||||
/// </param>
|
||||
void SetProgress(Int64 inSize, Int64 outSize);
|
||||
};
|
||||
|
||||
public interface ICoder
|
||||
{
|
||||
/// <summary>
|
||||
/// Codes streams.
|
||||
/// </summary>
|
||||
/// <param name="inStream">
|
||||
/// input Stream.
|
||||
/// </param>
|
||||
/// <param name="outStream">
|
||||
/// output Stream.
|
||||
/// </param>
|
||||
/// <param name="inSize">
|
||||
/// input Size. -1 if unknown.
|
||||
/// </param>
|
||||
/// <param name="outSize">
|
||||
/// output Size. -1 if unknown.
|
||||
/// </param>
|
||||
/// <param name="progress">
|
||||
/// callback progress reference.
|
||||
/// </param>
|
||||
/// <exception cref="SevenZip.DataErrorException">
|
||||
/// if input stream is not valid
|
||||
/// </exception>
|
||||
void Code(System.IO.Stream inStream, System.IO.Stream outStream,
|
||||
Int64 inSize, Int64 outSize, ICodeProgress progress);
|
||||
};
|
||||
|
||||
/*
|
||||
public interface ICoder2
|
||||
{
|
||||
void Code(ISequentialInStream []inStreams,
|
||||
const UInt64 []inSizes,
|
||||
ISequentialOutStream []outStreams,
|
||||
UInt64 []outSizes,
|
||||
ICodeProgress progress);
|
||||
};
|
||||
*/
|
||||
|
||||
/// <summary>
|
||||
/// Provides the fields that represent properties idenitifiers for compressing.
|
||||
/// </summary>
|
||||
public enum CoderPropID
|
||||
{
|
||||
/// <summary>
|
||||
/// Specifies default property.
|
||||
/// </summary>
|
||||
DefaultProp = 0,
|
||||
/// <summary>
|
||||
/// Specifies size of dictionary.
|
||||
/// </summary>
|
||||
DictionarySize,
|
||||
/// <summary>
|
||||
/// Specifies size of memory for PPM*.
|
||||
/// </summary>
|
||||
UsedMemorySize,
|
||||
/// <summary>
|
||||
/// Specifies order for PPM methods.
|
||||
/// </summary>
|
||||
Order,
|
||||
/// <summary>
|
||||
/// Specifies Block Size.
|
||||
/// </summary>
|
||||
BlockSize,
|
||||
/// <summary>
|
||||
/// Specifies number of postion state bits for LZMA (0 <= x <= 4).
|
||||
/// </summary>
|
||||
PosStateBits,
|
||||
/// <summary>
|
||||
/// Specifies number of literal context bits for LZMA (0 <= x <= 8).
|
||||
/// </summary>
|
||||
LitContextBits,
|
||||
/// <summary>
|
||||
/// Specifies number of literal position bits for LZMA (0 <= x <= 4).
|
||||
/// </summary>
|
||||
LitPosBits,
|
||||
/// <summary>
|
||||
/// Specifies number of fast bytes for LZ*.
|
||||
/// </summary>
|
||||
NumFastBytes,
|
||||
/// <summary>
|
||||
/// Specifies match finder. LZMA: "BT2", "BT4" or "BT4B".
|
||||
/// </summary>
|
||||
MatchFinder,
|
||||
/// <summary>
|
||||
/// Specifies the number of match finder cyckes.
|
||||
/// </summary>
|
||||
MatchFinderCycles,
|
||||
/// <summary>
|
||||
/// Specifies number of passes.
|
||||
/// </summary>
|
||||
NumPasses,
|
||||
/// <summary>
|
||||
/// Specifies number of algorithm.
|
||||
/// </summary>
|
||||
Algorithm,
|
||||
/// <summary>
|
||||
/// Specifies the number of threads.
|
||||
/// </summary>
|
||||
NumThreads,
|
||||
/// <summary>
|
||||
/// Specifies mode with end marker.
|
||||
/// </summary>
|
||||
EndMarker
|
||||
};
|
||||
|
||||
|
||||
public interface ISetCoderProperties
|
||||
{
|
||||
void SetCoderProperties(CoderPropID[] propIDs, object[] properties);
|
||||
};
|
||||
|
||||
public interface IWriteCoderProperties
|
||||
{
|
||||
void WriteCoderProperties(System.IO.Stream outStream);
|
||||
}
|
||||
|
||||
public interface ISetDecoderProperties
|
||||
{
|
||||
void SetDecoderProperties(byte[] properties);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,24 @@
|
|||
// IMatchFinder.cs
|
||||
|
||||
using System;
|
||||
|
||||
namespace SevenZip.Compression.LZ
|
||||
{
|
||||
interface IInWindowStream
|
||||
{
|
||||
void SetStream(System.IO.Stream inStream);
|
||||
void Init();
|
||||
void ReleaseStream();
|
||||
Byte GetIndexByte(Int32 index);
|
||||
UInt32 GetMatchLen(Int32 index, UInt32 distance, UInt32 limit);
|
||||
UInt32 GetNumAvailableBytes();
|
||||
}
|
||||
|
||||
interface IMatchFinder : IInWindowStream
|
||||
{
|
||||
void Create(UInt32 historySize, UInt32 keepAddBufferBefore,
|
||||
UInt32 matchMaxLen, UInt32 keepAddBufferAfter);
|
||||
UInt32 GetMatches(UInt32[] distances);
|
||||
void Skip(UInt32 num);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,72 @@
|
|||
// InBuffer.cs
|
||||
|
||||
namespace SevenZip.Buffer
|
||||
{
|
||||
public class InBuffer
|
||||
{
|
||||
byte[] m_Buffer;
|
||||
uint m_Pos;
|
||||
uint m_Limit;
|
||||
uint m_BufferSize;
|
||||
System.IO.Stream m_Stream;
|
||||
bool m_StreamWasExhausted;
|
||||
ulong m_ProcessedSize;
|
||||
|
||||
public InBuffer(uint bufferSize)
|
||||
{
|
||||
m_Buffer = new byte[bufferSize];
|
||||
m_BufferSize = bufferSize;
|
||||
}
|
||||
|
||||
public void Init(System.IO.Stream stream)
|
||||
{
|
||||
m_Stream = stream;
|
||||
m_ProcessedSize = 0;
|
||||
m_Limit = 0;
|
||||
m_Pos = 0;
|
||||
m_StreamWasExhausted = false;
|
||||
}
|
||||
|
||||
public bool ReadBlock()
|
||||
{
|
||||
if (m_StreamWasExhausted)
|
||||
return false;
|
||||
m_ProcessedSize += m_Pos;
|
||||
int aNumProcessedBytes = m_Stream.Read(m_Buffer, 0, (int)m_BufferSize);
|
||||
m_Pos = 0;
|
||||
m_Limit = (uint)aNumProcessedBytes;
|
||||
m_StreamWasExhausted = (aNumProcessedBytes == 0);
|
||||
return (!m_StreamWasExhausted);
|
||||
}
|
||||
|
||||
|
||||
public void ReleaseStream()
|
||||
{
|
||||
// m_Stream.Close();
|
||||
m_Stream = null;
|
||||
}
|
||||
|
||||
public bool ReadByte(byte b) // check it
|
||||
{
|
||||
if (m_Pos >= m_Limit)
|
||||
if (!ReadBlock())
|
||||
return false;
|
||||
b = m_Buffer[m_Pos++];
|
||||
return true;
|
||||
}
|
||||
|
||||
public byte ReadByte()
|
||||
{
|
||||
// return (byte)m_Stream.ReadByte();
|
||||
if (m_Pos >= m_Limit)
|
||||
if (!ReadBlock())
|
||||
return 0xFF;
|
||||
return m_Buffer[m_Pos++];
|
||||
}
|
||||
|
||||
public ulong GetProcessedSize()
|
||||
{
|
||||
return m_ProcessedSize + m_Pos;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,367 @@
|
|||
// LzBinTree.cs
|
||||
|
||||
using System;
|
||||
|
||||
namespace SevenZip.Compression.LZ
|
||||
{
|
||||
public class BinTree : InWindow, IMatchFinder
|
||||
{
|
||||
UInt32 _cyclicBufferPos;
|
||||
UInt32 _cyclicBufferSize = 0;
|
||||
UInt32 _matchMaxLen;
|
||||
|
||||
UInt32[] _son;
|
||||
UInt32[] _hash;
|
||||
|
||||
UInt32 _cutValue = 0xFF;
|
||||
UInt32 _hashMask;
|
||||
UInt32 _hashSizeSum = 0;
|
||||
|
||||
bool HASH_ARRAY = true;
|
||||
|
||||
const UInt32 kHash2Size = 1 << 10;
|
||||
const UInt32 kHash3Size = 1 << 16;
|
||||
const UInt32 kBT2HashSize = 1 << 16;
|
||||
const UInt32 kStartMaxLen = 1;
|
||||
const UInt32 kHash3Offset = kHash2Size;
|
||||
const UInt32 kEmptyHashValue = 0;
|
||||
const UInt32 kMaxValForNormalize = ((UInt32)1 << 31) - 1;
|
||||
|
||||
UInt32 kNumHashDirectBytes = 0;
|
||||
UInt32 kMinMatchCheck = 4;
|
||||
UInt32 kFixHashSize = kHash2Size + kHash3Size;
|
||||
|
||||
public void SetType(int numHashBytes)
|
||||
{
|
||||
HASH_ARRAY = (numHashBytes > 2);
|
||||
if (HASH_ARRAY)
|
||||
{
|
||||
kNumHashDirectBytes = 0;
|
||||
kMinMatchCheck = 4;
|
||||
kFixHashSize = kHash2Size + kHash3Size;
|
||||
}
|
||||
else
|
||||
{
|
||||
kNumHashDirectBytes = 2;
|
||||
kMinMatchCheck = 2 + 1;
|
||||
kFixHashSize = 0;
|
||||
}
|
||||
}
|
||||
|
||||
public new void SetStream(System.IO.Stream stream) { base.SetStream(stream); }
|
||||
public new void ReleaseStream() { base.ReleaseStream(); }
|
||||
|
||||
public new void Init()
|
||||
{
|
||||
base.Init();
|
||||
for (UInt32 i = 0; i < _hashSizeSum; i++)
|
||||
_hash[i] = kEmptyHashValue;
|
||||
_cyclicBufferPos = 0;
|
||||
ReduceOffsets(-1);
|
||||
}
|
||||
|
||||
public new void MovePos()
|
||||
{
|
||||
if (++_cyclicBufferPos >= _cyclicBufferSize)
|
||||
_cyclicBufferPos = 0;
|
||||
base.MovePos();
|
||||
if (_pos == kMaxValForNormalize)
|
||||
Normalize();
|
||||
}
|
||||
|
||||
public new Byte GetIndexByte(Int32 index) { return base.GetIndexByte(index); }
|
||||
|
||||
public new UInt32 GetMatchLen(Int32 index, UInt32 distance, UInt32 limit)
|
||||
{ return base.GetMatchLen(index, distance, limit); }
|
||||
|
||||
public new UInt32 GetNumAvailableBytes() { return base.GetNumAvailableBytes(); }
|
||||
|
||||
public void Create(UInt32 historySize, UInt32 keepAddBufferBefore,
|
||||
UInt32 matchMaxLen, UInt32 keepAddBufferAfter)
|
||||
{
|
||||
if (historySize > kMaxValForNormalize - 256)
|
||||
throw new Exception();
|
||||
_cutValue = 16 + (matchMaxLen >> 1);
|
||||
|
||||
UInt32 windowReservSize = (historySize + keepAddBufferBefore +
|
||||
matchMaxLen + keepAddBufferAfter) / 2 + 256;
|
||||
|
||||
base.Create(historySize + keepAddBufferBefore, matchMaxLen + keepAddBufferAfter, windowReservSize);
|
||||
|
||||
_matchMaxLen = matchMaxLen;
|
||||
|
||||
UInt32 cyclicBufferSize = historySize + 1;
|
||||
if (_cyclicBufferSize != cyclicBufferSize)
|
||||
_son = new UInt32[(_cyclicBufferSize = cyclicBufferSize) * 2];
|
||||
|
||||
UInt32 hs = kBT2HashSize;
|
||||
|
||||
if (HASH_ARRAY)
|
||||
{
|
||||
hs = historySize - 1;
|
||||
hs |= (hs >> 1);
|
||||
hs |= (hs >> 2);
|
||||
hs |= (hs >> 4);
|
||||
hs |= (hs >> 8);
|
||||
hs >>= 1;
|
||||
hs |= 0xFFFF;
|
||||
if (hs > (1 << 24))
|
||||
hs >>= 1;
|
||||
_hashMask = hs;
|
||||
hs++;
|
||||
hs += kFixHashSize;
|
||||
}
|
||||
if (hs != _hashSizeSum)
|
||||
_hash = new UInt32[_hashSizeSum = hs];
|
||||
}
|
||||
|
||||
public UInt32 GetMatches(UInt32[] distances)
|
||||
{
|
||||
UInt32 lenLimit;
|
||||
if (_pos + _matchMaxLen <= _streamPos)
|
||||
lenLimit = _matchMaxLen;
|
||||
else
|
||||
{
|
||||
lenLimit = _streamPos - _pos;
|
||||
if (lenLimit < kMinMatchCheck)
|
||||
{
|
||||
MovePos();
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
UInt32 offset = 0;
|
||||
UInt32 matchMinPos = (_pos > _cyclicBufferSize) ? (_pos - _cyclicBufferSize) : 0;
|
||||
UInt32 cur = _bufferOffset + _pos;
|
||||
UInt32 maxLen = kStartMaxLen; // to avoid items for len < hashSize;
|
||||
UInt32 hashValue, hash2Value = 0, hash3Value = 0;
|
||||
|
||||
if (HASH_ARRAY)
|
||||
{
|
||||
UInt32 temp = CRC.Table[_bufferBase[cur]] ^ _bufferBase[cur + 1];
|
||||
hash2Value = temp & (kHash2Size - 1);
|
||||
temp ^= ((UInt32)(_bufferBase[cur + 2]) << 8);
|
||||
hash3Value = temp & (kHash3Size - 1);
|
||||
hashValue = (temp ^ (CRC.Table[_bufferBase[cur + 3]] << 5)) & _hashMask;
|
||||
}
|
||||
else
|
||||
hashValue = _bufferBase[cur] ^ ((UInt32)(_bufferBase[cur + 1]) << 8);
|
||||
|
||||
UInt32 curMatch = _hash[kFixHashSize + hashValue];
|
||||
if (HASH_ARRAY)
|
||||
{
|
||||
UInt32 curMatch2 = _hash[hash2Value];
|
||||
UInt32 curMatch3 = _hash[kHash3Offset + hash3Value];
|
||||
_hash[hash2Value] = _pos;
|
||||
_hash[kHash3Offset + hash3Value] = _pos;
|
||||
if (curMatch2 > matchMinPos)
|
||||
if (_bufferBase[_bufferOffset + curMatch2] == _bufferBase[cur])
|
||||
{
|
||||
distances[offset++] = maxLen = 2;
|
||||
distances[offset++] = _pos - curMatch2 - 1;
|
||||
}
|
||||
if (curMatch3 > matchMinPos)
|
||||
if (_bufferBase[_bufferOffset + curMatch3] == _bufferBase[cur])
|
||||
{
|
||||
if (curMatch3 == curMatch2)
|
||||
offset -= 2;
|
||||
distances[offset++] = maxLen = 3;
|
||||
distances[offset++] = _pos - curMatch3 - 1;
|
||||
curMatch2 = curMatch3;
|
||||
}
|
||||
if (offset != 0 && curMatch2 == curMatch)
|
||||
{
|
||||
offset -= 2;
|
||||
maxLen = kStartMaxLen;
|
||||
}
|
||||
}
|
||||
|
||||
_hash[kFixHashSize + hashValue] = _pos;
|
||||
|
||||
UInt32 ptr0 = (_cyclicBufferPos << 1) + 1;
|
||||
UInt32 ptr1 = (_cyclicBufferPos << 1);
|
||||
|
||||
UInt32 len0, len1;
|
||||
len0 = len1 = kNumHashDirectBytes;
|
||||
|
||||
if (kNumHashDirectBytes != 0)
|
||||
{
|
||||
if (curMatch > matchMinPos)
|
||||
{
|
||||
if (_bufferBase[_bufferOffset + curMatch + kNumHashDirectBytes] !=
|
||||
_bufferBase[cur + kNumHashDirectBytes])
|
||||
{
|
||||
distances[offset++] = maxLen = kNumHashDirectBytes;
|
||||
distances[offset++] = _pos - curMatch - 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
UInt32 count = _cutValue;
|
||||
|
||||
while(true)
|
||||
{
|
||||
if(curMatch <= matchMinPos || count-- == 0)
|
||||
{
|
||||
_son[ptr0] = _son[ptr1] = kEmptyHashValue;
|
||||
break;
|
||||
}
|
||||
UInt32 delta = _pos - curMatch;
|
||||
UInt32 cyclicPos = ((delta <= _cyclicBufferPos) ?
|
||||
(_cyclicBufferPos - delta) :
|
||||
(_cyclicBufferPos - delta + _cyclicBufferSize)) << 1;
|
||||
|
||||
UInt32 pby1 = _bufferOffset + curMatch;
|
||||
UInt32 len = Math.Min(len0, len1);
|
||||
if (_bufferBase[pby1 + len] == _bufferBase[cur + len])
|
||||
{
|
||||
while(++len != lenLimit)
|
||||
if (_bufferBase[pby1 + len] != _bufferBase[cur + len])
|
||||
break;
|
||||
if (maxLen < len)
|
||||
{
|
||||
distances[offset++] = maxLen = len;
|
||||
distances[offset++] = delta - 1;
|
||||
if (len == lenLimit)
|
||||
{
|
||||
_son[ptr1] = _son[cyclicPos];
|
||||
_son[ptr0] = _son[cyclicPos + 1];
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (_bufferBase[pby1 + len] < _bufferBase[cur + len])
|
||||
{
|
||||
_son[ptr1] = curMatch;
|
||||
ptr1 = cyclicPos + 1;
|
||||
curMatch = _son[ptr1];
|
||||
len1 = len;
|
||||
}
|
||||
else
|
||||
{
|
||||
_son[ptr0] = curMatch;
|
||||
ptr0 = cyclicPos;
|
||||
curMatch = _son[ptr0];
|
||||
len0 = len;
|
||||
}
|
||||
}
|
||||
MovePos();
|
||||
return offset;
|
||||
}
|
||||
|
||||
public void Skip(UInt32 num)
|
||||
{
|
||||
do
|
||||
{
|
||||
UInt32 lenLimit;
|
||||
if (_pos + _matchMaxLen <= _streamPos)
|
||||
lenLimit = _matchMaxLen;
|
||||
else
|
||||
{
|
||||
lenLimit = _streamPos - _pos;
|
||||
if (lenLimit < kMinMatchCheck)
|
||||
{
|
||||
MovePos();
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
||||
UInt32 matchMinPos = (_pos > _cyclicBufferSize) ? (_pos - _cyclicBufferSize) : 0;
|
||||
UInt32 cur = _bufferOffset + _pos;
|
||||
|
||||
UInt32 hashValue;
|
||||
|
||||
if (HASH_ARRAY)
|
||||
{
|
||||
UInt32 temp = CRC.Table[_bufferBase[cur]] ^ _bufferBase[cur + 1];
|
||||
UInt32 hash2Value = temp & (kHash2Size - 1);
|
||||
_hash[hash2Value] = _pos;
|
||||
temp ^= ((UInt32)(_bufferBase[cur + 2]) << 8);
|
||||
UInt32 hash3Value = temp & (kHash3Size - 1);
|
||||
_hash[kHash3Offset + hash3Value] = _pos;
|
||||
hashValue = (temp ^ (CRC.Table[_bufferBase[cur + 3]] << 5)) & _hashMask;
|
||||
}
|
||||
else
|
||||
hashValue = _bufferBase[cur] ^ ((UInt32)(_bufferBase[cur + 1]) << 8);
|
||||
|
||||
UInt32 curMatch = _hash[kFixHashSize + hashValue];
|
||||
_hash[kFixHashSize + hashValue] = _pos;
|
||||
|
||||
UInt32 ptr0 = (_cyclicBufferPos << 1) + 1;
|
||||
UInt32 ptr1 = (_cyclicBufferPos << 1);
|
||||
|
||||
UInt32 len0, len1;
|
||||
len0 = len1 = kNumHashDirectBytes;
|
||||
|
||||
UInt32 count = _cutValue;
|
||||
while (true)
|
||||
{
|
||||
if (curMatch <= matchMinPos || count-- == 0)
|
||||
{
|
||||
_son[ptr0] = _son[ptr1] = kEmptyHashValue;
|
||||
break;
|
||||
}
|
||||
|
||||
UInt32 delta = _pos - curMatch;
|
||||
UInt32 cyclicPos = ((delta <= _cyclicBufferPos) ?
|
||||
(_cyclicBufferPos - delta) :
|
||||
(_cyclicBufferPos - delta + _cyclicBufferSize)) << 1;
|
||||
|
||||
UInt32 pby1 = _bufferOffset + curMatch;
|
||||
UInt32 len = Math.Min(len0, len1);
|
||||
if (_bufferBase[pby1 + len] == _bufferBase[cur + len])
|
||||
{
|
||||
while (++len != lenLimit)
|
||||
if (_bufferBase[pby1 + len] != _bufferBase[cur + len])
|
||||
break;
|
||||
if (len == lenLimit)
|
||||
{
|
||||
_son[ptr1] = _son[cyclicPos];
|
||||
_son[ptr0] = _son[cyclicPos + 1];
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (_bufferBase[pby1 + len] < _bufferBase[cur + len])
|
||||
{
|
||||
_son[ptr1] = curMatch;
|
||||
ptr1 = cyclicPos + 1;
|
||||
curMatch = _son[ptr1];
|
||||
len1 = len;
|
||||
}
|
||||
else
|
||||
{
|
||||
_son[ptr0] = curMatch;
|
||||
ptr0 = cyclicPos;
|
||||
curMatch = _son[ptr0];
|
||||
len0 = len;
|
||||
}
|
||||
}
|
||||
MovePos();
|
||||
}
|
||||
while (--num != 0);
|
||||
}
|
||||
|
||||
void NormalizeLinks(UInt32[] items, UInt32 numItems, UInt32 subValue)
|
||||
{
|
||||
for (UInt32 i = 0; i < numItems; i++)
|
||||
{
|
||||
UInt32 value = items[i];
|
||||
if (value <= subValue)
|
||||
value = kEmptyHashValue;
|
||||
else
|
||||
value -= subValue;
|
||||
items[i] = value;
|
||||
}
|
||||
}
|
||||
|
||||
void Normalize()
|
||||
{
|
||||
UInt32 subValue = _pos - _cyclicBufferSize;
|
||||
NormalizeLinks(_son, _cyclicBufferSize * 2, subValue);
|
||||
NormalizeLinks(_hash, _hashSizeSum, subValue);
|
||||
ReduceOffsets((Int32)subValue);
|
||||
}
|
||||
|
||||
public void SetCutValue(UInt32 cutValue) { _cutValue = cutValue; }
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,132 @@
|
|||
// LzInWindow.cs
|
||||
|
||||
using System;
|
||||
|
||||
namespace SevenZip.Compression.LZ
|
||||
{
|
||||
public class InWindow
|
||||
{
|
||||
public Byte[] _bufferBase = null; // pointer to buffer with data
|
||||
System.IO.Stream _stream;
|
||||
UInt32 _posLimit; // offset (from _buffer) of first byte when new block reading must be done
|
||||
bool _streamEndWasReached; // if (true) then _streamPos shows real end of stream
|
||||
|
||||
UInt32 _pointerToLastSafePosition;
|
||||
|
||||
public UInt32 _bufferOffset;
|
||||
|
||||
public UInt32 _blockSize; // Size of Allocated memory block
|
||||
public UInt32 _pos; // offset (from _buffer) of curent byte
|
||||
UInt32 _keepSizeBefore; // how many BYTEs must be kept in buffer before _pos
|
||||
UInt32 _keepSizeAfter; // how many BYTEs must be kept buffer after _pos
|
||||
public UInt32 _streamPos; // offset (from _buffer) of first not read byte from Stream
|
||||
|
||||
public void MoveBlock()
|
||||
{
|
||||
UInt32 offset = (UInt32)(_bufferOffset) + _pos - _keepSizeBefore;
|
||||
// we need one additional byte, since MovePos moves on 1 byte.
|
||||
if (offset > 0)
|
||||
offset--;
|
||||
|
||||
UInt32 numBytes = (UInt32)(_bufferOffset) + _streamPos - offset;
|
||||
|
||||
// check negative offset ????
|
||||
for (UInt32 i = 0; i < numBytes; i++)
|
||||
_bufferBase[i] = _bufferBase[offset + i];
|
||||
_bufferOffset -= offset;
|
||||
}
|
||||
|
||||
public virtual void ReadBlock()
|
||||
{
|
||||
if (_streamEndWasReached)
|
||||
return;
|
||||
while (true)
|
||||
{
|
||||
int size = (int)((0 - _bufferOffset) + _blockSize - _streamPos);
|
||||
if (size == 0)
|
||||
return;
|
||||
int numReadBytes = _stream.Read(_bufferBase, (int)(_bufferOffset + _streamPos), size);
|
||||
if (numReadBytes == 0)
|
||||
{
|
||||
_posLimit = _streamPos;
|
||||
UInt32 pointerToPostion = _bufferOffset + _posLimit;
|
||||
if (pointerToPostion > _pointerToLastSafePosition)
|
||||
_posLimit = (UInt32)(_pointerToLastSafePosition - _bufferOffset);
|
||||
|
||||
_streamEndWasReached = true;
|
||||
return;
|
||||
}
|
||||
_streamPos += (UInt32)numReadBytes;
|
||||
if (_streamPos >= _pos + _keepSizeAfter)
|
||||
_posLimit = _streamPos - _keepSizeAfter;
|
||||
}
|
||||
}
|
||||
|
||||
void Free() { _bufferBase = null; }
|
||||
|
||||
public void Create(UInt32 keepSizeBefore, UInt32 keepSizeAfter, UInt32 keepSizeReserv)
|
||||
{
|
||||
_keepSizeBefore = keepSizeBefore;
|
||||
_keepSizeAfter = keepSizeAfter;
|
||||
UInt32 blockSize = keepSizeBefore + keepSizeAfter + keepSizeReserv;
|
||||
if (_bufferBase == null || _blockSize != blockSize)
|
||||
{
|
||||
Free();
|
||||
_blockSize = blockSize;
|
||||
_bufferBase = new Byte[_blockSize];
|
||||
}
|
||||
_pointerToLastSafePosition = _blockSize - keepSizeAfter;
|
||||
}
|
||||
|
||||
public void SetStream(System.IO.Stream stream) { _stream = stream; }
|
||||
public void ReleaseStream() { _stream = null; }
|
||||
|
||||
public void Init()
|
||||
{
|
||||
_bufferOffset = 0;
|
||||
_pos = 0;
|
||||
_streamPos = 0;
|
||||
_streamEndWasReached = false;
|
||||
ReadBlock();
|
||||
}
|
||||
|
||||
public void MovePos()
|
||||
{
|
||||
_pos++;
|
||||
if (_pos > _posLimit)
|
||||
{
|
||||
UInt32 pointerToPostion = _bufferOffset + _pos;
|
||||
if (pointerToPostion > _pointerToLastSafePosition)
|
||||
MoveBlock();
|
||||
ReadBlock();
|
||||
}
|
||||
}
|
||||
|
||||
public Byte GetIndexByte(Int32 index) { return _bufferBase[_bufferOffset + _pos + index]; }
|
||||
|
||||
// index + limit have not to exceed _keepSizeAfter;
|
||||
public UInt32 GetMatchLen(Int32 index, UInt32 distance, UInt32 limit)
|
||||
{
|
||||
if (_streamEndWasReached)
|
||||
if ((_pos + index) + limit > _streamPos)
|
||||
limit = _streamPos - (UInt32)(_pos + index);
|
||||
distance++;
|
||||
// Byte *pby = _buffer + (size_t)_pos + index;
|
||||
UInt32 pby = _bufferOffset + _pos + (UInt32)index;
|
||||
|
||||
UInt32 i;
|
||||
for (i = 0; i < limit && _bufferBase[pby + i] == _bufferBase[pby + i - distance]; i++);
|
||||
return i;
|
||||
}
|
||||
|
||||
public UInt32 GetNumAvailableBytes() { return _streamPos - _pos; }
|
||||
|
||||
public void ReduceOffsets(Int32 subValue)
|
||||
{
|
||||
_bufferOffset += (UInt32)subValue;
|
||||
_posLimit -= (UInt32)subValue;
|
||||
_pos -= (UInt32)subValue;
|
||||
_streamPos -= (UInt32)subValue;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,110 @@
|
|||
// LzOutWindow.cs
|
||||
|
||||
namespace SevenZip.Compression.LZ
|
||||
{
|
||||
public class OutWindow
|
||||
{
|
||||
byte[] _buffer = null;
|
||||
uint _pos;
|
||||
uint _windowSize = 0;
|
||||
uint _streamPos;
|
||||
System.IO.Stream _stream;
|
||||
|
||||
public uint TrainSize = 0;
|
||||
|
||||
public void Create(uint windowSize)
|
||||
{
|
||||
if (_windowSize != windowSize)
|
||||
{
|
||||
// System.GC.Collect();
|
||||
_buffer = new byte[windowSize];
|
||||
}
|
||||
_windowSize = windowSize;
|
||||
_pos = 0;
|
||||
_streamPos = 0;
|
||||
}
|
||||
|
||||
public void Init(System.IO.Stream stream, bool solid)
|
||||
{
|
||||
ReleaseStream();
|
||||
_stream = stream;
|
||||
if (!solid)
|
||||
{
|
||||
_streamPos = 0;
|
||||
_pos = 0;
|
||||
TrainSize = 0;
|
||||
}
|
||||
}
|
||||
|
||||
public bool Train(System.IO.Stream stream)
|
||||
{
|
||||
long len = stream.Length;
|
||||
uint size = (len < _windowSize) ? (uint)len : _windowSize;
|
||||
TrainSize = size;
|
||||
stream.Position = len - size;
|
||||
_streamPos = _pos = 0;
|
||||
while (size > 0)
|
||||
{
|
||||
uint curSize = _windowSize - _pos;
|
||||
if (size < curSize)
|
||||
curSize = size;
|
||||
int numReadBytes = stream.Read(_buffer, (int)_pos, (int)curSize);
|
||||
if (numReadBytes == 0)
|
||||
return false;
|
||||
size -= (uint)numReadBytes;
|
||||
_pos += (uint)numReadBytes;
|
||||
_streamPos += (uint)numReadBytes;
|
||||
if (_pos == _windowSize)
|
||||
_streamPos = _pos = 0;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
public void ReleaseStream()
|
||||
{
|
||||
Flush();
|
||||
_stream = null;
|
||||
}
|
||||
|
||||
public void Flush()
|
||||
{
|
||||
uint size = _pos - _streamPos;
|
||||
if (size == 0)
|
||||
return;
|
||||
_stream.Write(_buffer, (int)_streamPos, (int)size);
|
||||
if (_pos >= _windowSize)
|
||||
_pos = 0;
|
||||
_streamPos = _pos;
|
||||
}
|
||||
|
||||
public void CopyBlock(uint distance, uint len)
|
||||
{
|
||||
uint pos = _pos - distance - 1;
|
||||
if (pos >= _windowSize)
|
||||
pos += _windowSize;
|
||||
for (; len > 0; len--)
|
||||
{
|
||||
if (pos >= _windowSize)
|
||||
pos = 0;
|
||||
_buffer[_pos++] = _buffer[pos++];
|
||||
if (_pos >= _windowSize)
|
||||
Flush();
|
||||
}
|
||||
}
|
||||
|
||||
public void PutByte(byte b)
|
||||
{
|
||||
_buffer[_pos++] = b;
|
||||
if (_pos >= _windowSize)
|
||||
Flush();
|
||||
}
|
||||
|
||||
public byte GetByte(uint distance)
|
||||
{
|
||||
uint pos = _pos - distance - 1;
|
||||
if (pos >= _windowSize)
|
||||
pos += _windowSize;
|
||||
return _buffer[pos];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,76 @@
|
|||
// LzmaBase.cs
|
||||
|
||||
namespace SevenZip.Compression.LZMA
|
||||
{
|
||||
internal abstract class Base
|
||||
{
|
||||
public const uint kNumRepDistances = 4;
|
||||
public const uint kNumStates = 12;
|
||||
|
||||
// static byte []kLiteralNextStates = {0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 4, 5};
|
||||
// static byte []kMatchNextStates = {7, 7, 7, 7, 7, 7, 7, 10, 10, 10, 10, 10};
|
||||
// static byte []kRepNextStates = {8, 8, 8, 8, 8, 8, 8, 11, 11, 11, 11, 11};
|
||||
// static byte []kShortRepNextStates = {9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11};
|
||||
|
||||
public struct State
|
||||
{
|
||||
public uint Index;
|
||||
public void Init() { Index = 0; }
|
||||
public void UpdateChar()
|
||||
{
|
||||
if (Index < 4) Index = 0;
|
||||
else if (Index < 10) Index -= 3;
|
||||
else Index -= 6;
|
||||
}
|
||||
public void UpdateMatch() { Index = (uint)(Index < 7 ? 7 : 10); }
|
||||
public void UpdateRep() { Index = (uint)(Index < 7 ? 8 : 11); }
|
||||
public void UpdateShortRep() { Index = (uint)(Index < 7 ? 9 : 11); }
|
||||
public bool IsCharState() { return Index < 7; }
|
||||
}
|
||||
|
||||
public const int kNumPosSlotBits = 6;
|
||||
public const int kDicLogSizeMin = 0;
|
||||
// public const int kDicLogSizeMax = 30;
|
||||
// public const uint kDistTableSizeMax = kDicLogSizeMax * 2;
|
||||
|
||||
public const int kNumLenToPosStatesBits = 2; // it's for speed optimization
|
||||
public const uint kNumLenToPosStates = 1 << kNumLenToPosStatesBits;
|
||||
|
||||
public const uint kMatchMinLen = 2;
|
||||
|
||||
public static uint GetLenToPosState(uint len)
|
||||
{
|
||||
len -= kMatchMinLen;
|
||||
if (len < kNumLenToPosStates)
|
||||
return len;
|
||||
return (uint)(kNumLenToPosStates - 1);
|
||||
}
|
||||
|
||||
public const int kNumAlignBits = 4;
|
||||
public const uint kAlignTableSize = 1 << kNumAlignBits;
|
||||
public const uint kAlignMask = (kAlignTableSize - 1);
|
||||
|
||||
public const uint kStartPosModelIndex = 4;
|
||||
public const uint kEndPosModelIndex = 14;
|
||||
public const uint kNumPosModels = kEndPosModelIndex - kStartPosModelIndex;
|
||||
|
||||
public const uint kNumFullDistances = 1 << ((int)kEndPosModelIndex / 2);
|
||||
|
||||
public const uint kNumLitPosStatesBitsEncodingMax = 4;
|
||||
public const uint kNumLitContextBitsMax = 8;
|
||||
|
||||
public const int kNumPosStatesBitsMax = 4;
|
||||
public const uint kNumPosStatesMax = (1 << kNumPosStatesBitsMax);
|
||||
public const int kNumPosStatesBitsEncodingMax = 4;
|
||||
public const uint kNumPosStatesEncodingMax = (1 << kNumPosStatesBitsEncodingMax);
|
||||
|
||||
public const int kNumLowLenBits = 3;
|
||||
public const int kNumMidLenBits = 3;
|
||||
public const int kNumHighLenBits = 8;
|
||||
public const uint kNumLowLenSymbols = 1 << kNumLowLenBits;
|
||||
public const uint kNumMidLenSymbols = 1 << kNumMidLenBits;
|
||||
public const uint kNumLenSymbols = kNumLowLenSymbols + kNumMidLenSymbols +
|
||||
(1 << kNumHighLenBits);
|
||||
public const uint kMatchMaxLen = kMatchMinLen + kNumLenSymbols - 1;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,398 @@
|
|||
// LzmaDecoder.cs
|
||||
|
||||
using System;
|
||||
|
||||
namespace SevenZip.Compression.LZMA
|
||||
{
|
||||
using RangeCoder;
|
||||
|
||||
public class Decoder : ICoder, ISetDecoderProperties // ,System.IO.Stream
|
||||
{
|
||||
class LenDecoder
|
||||
{
|
||||
BitDecoder m_Choice = new BitDecoder();
|
||||
BitDecoder m_Choice2 = new BitDecoder();
|
||||
BitTreeDecoder[] m_LowCoder = new BitTreeDecoder[Base.kNumPosStatesMax];
|
||||
BitTreeDecoder[] m_MidCoder = new BitTreeDecoder[Base.kNumPosStatesMax];
|
||||
BitTreeDecoder m_HighCoder = new BitTreeDecoder(Base.kNumHighLenBits);
|
||||
uint m_NumPosStates = 0;
|
||||
|
||||
public void Create(uint numPosStates)
|
||||
{
|
||||
for (uint posState = m_NumPosStates; posState < numPosStates; posState++)
|
||||
{
|
||||
m_LowCoder[posState] = new BitTreeDecoder(Base.kNumLowLenBits);
|
||||
m_MidCoder[posState] = new BitTreeDecoder(Base.kNumMidLenBits);
|
||||
}
|
||||
m_NumPosStates = numPosStates;
|
||||
}
|
||||
|
||||
public void Init()
|
||||
{
|
||||
m_Choice.Init();
|
||||
for (uint posState = 0; posState < m_NumPosStates; posState++)
|
||||
{
|
||||
m_LowCoder[posState].Init();
|
||||
m_MidCoder[posState].Init();
|
||||
}
|
||||
m_Choice2.Init();
|
||||
m_HighCoder.Init();
|
||||
}
|
||||
|
||||
public uint Decode(RangeCoder.Decoder rangeDecoder, uint posState)
|
||||
{
|
||||
if (m_Choice.Decode(rangeDecoder) == 0)
|
||||
return m_LowCoder[posState].Decode(rangeDecoder);
|
||||
else
|
||||
{
|
||||
uint symbol = Base.kNumLowLenSymbols;
|
||||
if (m_Choice2.Decode(rangeDecoder) == 0)
|
||||
symbol += m_MidCoder[posState].Decode(rangeDecoder);
|
||||
else
|
||||
{
|
||||
symbol += Base.kNumMidLenSymbols;
|
||||
symbol += m_HighCoder.Decode(rangeDecoder);
|
||||
}
|
||||
return symbol;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
class LiteralDecoder
|
||||
{
|
||||
struct Decoder2
|
||||
{
|
||||
BitDecoder[] m_Decoders;
|
||||
public void Create() { m_Decoders = new BitDecoder[0x300]; }
|
||||
public void Init() { for (int i = 0; i < 0x300; i++) m_Decoders[i].Init(); }
|
||||
|
||||
public byte DecodeNormal(RangeCoder.Decoder rangeDecoder)
|
||||
{
|
||||
uint symbol = 1;
|
||||
do
|
||||
symbol = (symbol << 1) | m_Decoders[symbol].Decode(rangeDecoder);
|
||||
while (symbol < 0x100);
|
||||
return (byte)symbol;
|
||||
}
|
||||
|
||||
public byte DecodeWithMatchByte(RangeCoder.Decoder rangeDecoder, byte matchByte)
|
||||
{
|
||||
uint symbol = 1;
|
||||
do
|
||||
{
|
||||
uint matchBit = (uint)(matchByte >> 7) & 1;
|
||||
matchByte <<= 1;
|
||||
uint bit = m_Decoders[((1 + matchBit) << 8) + symbol].Decode(rangeDecoder);
|
||||
symbol = (symbol << 1) | bit;
|
||||
if (matchBit != bit)
|
||||
{
|
||||
while (symbol < 0x100)
|
||||
symbol = (symbol << 1) | m_Decoders[symbol].Decode(rangeDecoder);
|
||||
break;
|
||||
}
|
||||
}
|
||||
while (symbol < 0x100);
|
||||
return (byte)symbol;
|
||||
}
|
||||
}
|
||||
|
||||
Decoder2[] m_Coders;
|
||||
int m_NumPrevBits;
|
||||
int m_NumPosBits;
|
||||
uint m_PosMask;
|
||||
|
||||
public void Create(int numPosBits, int numPrevBits)
|
||||
{
|
||||
if (m_Coders != null && m_NumPrevBits == numPrevBits &&
|
||||
m_NumPosBits == numPosBits)
|
||||
return;
|
||||
m_NumPosBits = numPosBits;
|
||||
m_PosMask = ((uint)1 << numPosBits) - 1;
|
||||
m_NumPrevBits = numPrevBits;
|
||||
uint numStates = (uint)1 << (m_NumPrevBits + m_NumPosBits);
|
||||
m_Coders = new Decoder2[numStates];
|
||||
for (uint i = 0; i < numStates; i++)
|
||||
m_Coders[i].Create();
|
||||
}
|
||||
|
||||
public void Init()
|
||||
{
|
||||
uint numStates = (uint)1 << (m_NumPrevBits + m_NumPosBits);
|
||||
for (uint i = 0; i < numStates; i++)
|
||||
m_Coders[i].Init();
|
||||
}
|
||||
|
||||
uint GetState(uint pos, byte prevByte)
|
||||
{ return ((pos & m_PosMask) << m_NumPrevBits) + (uint)(prevByte >> (8 - m_NumPrevBits)); }
|
||||
|
||||
public byte DecodeNormal(RangeCoder.Decoder rangeDecoder, uint pos, byte prevByte)
|
||||
{ return m_Coders[GetState(pos, prevByte)].DecodeNormal(rangeDecoder); }
|
||||
|
||||
public byte DecodeWithMatchByte(RangeCoder.Decoder rangeDecoder, uint pos, byte prevByte, byte matchByte)
|
||||
{ return m_Coders[GetState(pos, prevByte)].DecodeWithMatchByte(rangeDecoder, matchByte); }
|
||||
};
|
||||
|
||||
LZ.OutWindow m_OutWindow = new LZ.OutWindow();
|
||||
RangeCoder.Decoder m_RangeDecoder = new RangeCoder.Decoder();
|
||||
|
||||
BitDecoder[] m_IsMatchDecoders = new BitDecoder[Base.kNumStates << Base.kNumPosStatesBitsMax];
|
||||
BitDecoder[] m_IsRepDecoders = new BitDecoder[Base.kNumStates];
|
||||
BitDecoder[] m_IsRepG0Decoders = new BitDecoder[Base.kNumStates];
|
||||
BitDecoder[] m_IsRepG1Decoders = new BitDecoder[Base.kNumStates];
|
||||
BitDecoder[] m_IsRepG2Decoders = new BitDecoder[Base.kNumStates];
|
||||
BitDecoder[] m_IsRep0LongDecoders = new BitDecoder[Base.kNumStates << Base.kNumPosStatesBitsMax];
|
||||
|
||||
BitTreeDecoder[] m_PosSlotDecoder = new BitTreeDecoder[Base.kNumLenToPosStates];
|
||||
BitDecoder[] m_PosDecoders = new BitDecoder[Base.kNumFullDistances - Base.kEndPosModelIndex];
|
||||
|
||||
BitTreeDecoder m_PosAlignDecoder = new BitTreeDecoder(Base.kNumAlignBits);
|
||||
|
||||
LenDecoder m_LenDecoder = new LenDecoder();
|
||||
LenDecoder m_RepLenDecoder = new LenDecoder();
|
||||
|
||||
LiteralDecoder m_LiteralDecoder = new LiteralDecoder();
|
||||
|
||||
uint m_DictionarySize;
|
||||
uint m_DictionarySizeCheck;
|
||||
|
||||
uint m_PosStateMask;
|
||||
|
||||
public Decoder()
|
||||
{
|
||||
m_DictionarySize = 0xFFFFFFFF;
|
||||
for (int i = 0; i < Base.kNumLenToPosStates; i++)
|
||||
m_PosSlotDecoder[i] = new BitTreeDecoder(Base.kNumPosSlotBits);
|
||||
}
|
||||
|
||||
void SetDictionarySize(uint dictionarySize)
|
||||
{
|
||||
if (m_DictionarySize != dictionarySize)
|
||||
{
|
||||
m_DictionarySize = dictionarySize;
|
||||
m_DictionarySizeCheck = Math.Max(m_DictionarySize, 1);
|
||||
uint blockSize = Math.Max(m_DictionarySizeCheck, (1 << 12));
|
||||
m_OutWindow.Create(blockSize);
|
||||
}
|
||||
}
|
||||
|
||||
void SetLiteralProperties(int lp, int lc)
|
||||
{
|
||||
if (lp > 8)
|
||||
throw new InvalidParamException();
|
||||
if (lc > 8)
|
||||
throw new InvalidParamException();
|
||||
m_LiteralDecoder.Create(lp, lc);
|
||||
}
|
||||
|
||||
void SetPosBitsProperties(int pb)
|
||||
{
|
||||
if (pb > Base.kNumPosStatesBitsMax)
|
||||
throw new InvalidParamException();
|
||||
uint numPosStates = (uint)1 << pb;
|
||||
m_LenDecoder.Create(numPosStates);
|
||||
m_RepLenDecoder.Create(numPosStates);
|
||||
m_PosStateMask = numPosStates - 1;
|
||||
}
|
||||
|
||||
bool _solid = false;
|
||||
void Init(System.IO.Stream inStream, System.IO.Stream outStream)
|
||||
{
|
||||
m_RangeDecoder.Init(inStream);
|
||||
m_OutWindow.Init(outStream, _solid);
|
||||
|
||||
uint i;
|
||||
for (i = 0; i < Base.kNumStates; i++)
|
||||
{
|
||||
for (uint j = 0; j <= m_PosStateMask; j++)
|
||||
{
|
||||
uint index = (i << Base.kNumPosStatesBitsMax) + j;
|
||||
m_IsMatchDecoders[index].Init();
|
||||
m_IsRep0LongDecoders[index].Init();
|
||||
}
|
||||
m_IsRepDecoders[i].Init();
|
||||
m_IsRepG0Decoders[i].Init();
|
||||
m_IsRepG1Decoders[i].Init();
|
||||
m_IsRepG2Decoders[i].Init();
|
||||
}
|
||||
|
||||
m_LiteralDecoder.Init();
|
||||
for (i = 0; i < Base.kNumLenToPosStates; i++)
|
||||
m_PosSlotDecoder[i].Init();
|
||||
// m_PosSpecDecoder.Init();
|
||||
for (i = 0; i < Base.kNumFullDistances - Base.kEndPosModelIndex; i++)
|
||||
m_PosDecoders[i].Init();
|
||||
|
||||
m_LenDecoder.Init();
|
||||
m_RepLenDecoder.Init();
|
||||
m_PosAlignDecoder.Init();
|
||||
}
|
||||
|
||||
public void Code(System.IO.Stream inStream, System.IO.Stream outStream,
|
||||
Int64 inSize, Int64 outSize, ICodeProgress progress)
|
||||
{
|
||||
Init(inStream, outStream);
|
||||
|
||||
Base.State state = new Base.State();
|
||||
state.Init();
|
||||
uint rep0 = 0, rep1 = 0, rep2 = 0, rep3 = 0;
|
||||
|
||||
UInt64 nowPos64 = 0;
|
||||
UInt64 outSize64 = (UInt64)outSize;
|
||||
if (nowPos64 < outSize64)
|
||||
{
|
||||
if (m_IsMatchDecoders[state.Index << Base.kNumPosStatesBitsMax].Decode(m_RangeDecoder) != 0)
|
||||
throw new DataErrorException();
|
||||
state.UpdateChar();
|
||||
byte b = m_LiteralDecoder.DecodeNormal(m_RangeDecoder, 0, 0);
|
||||
m_OutWindow.PutByte(b);
|
||||
nowPos64++;
|
||||
}
|
||||
while (nowPos64 < outSize64)
|
||||
{
|
||||
// UInt64 next = Math.Min(nowPos64 + (1 << 18), outSize64);
|
||||
// while(nowPos64 < next)
|
||||
{
|
||||
uint posState = (uint)nowPos64 & m_PosStateMask;
|
||||
if (m_IsMatchDecoders[(state.Index << Base.kNumPosStatesBitsMax) + posState].Decode(m_RangeDecoder) == 0)
|
||||
{
|
||||
byte b;
|
||||
byte prevByte = m_OutWindow.GetByte(0);
|
||||
if (!state.IsCharState())
|
||||
b = m_LiteralDecoder.DecodeWithMatchByte(m_RangeDecoder,
|
||||
(uint)nowPos64, prevByte, m_OutWindow.GetByte(rep0));
|
||||
else
|
||||
b = m_LiteralDecoder.DecodeNormal(m_RangeDecoder, (uint)nowPos64, prevByte);
|
||||
m_OutWindow.PutByte(b);
|
||||
state.UpdateChar();
|
||||
nowPos64++;
|
||||
}
|
||||
else
|
||||
{
|
||||
uint len;
|
||||
if (m_IsRepDecoders[state.Index].Decode(m_RangeDecoder) == 1)
|
||||
{
|
||||
if (m_IsRepG0Decoders[state.Index].Decode(m_RangeDecoder) == 0)
|
||||
{
|
||||
if (m_IsRep0LongDecoders[(state.Index << Base.kNumPosStatesBitsMax) + posState].Decode(m_RangeDecoder) == 0)
|
||||
{
|
||||
state.UpdateShortRep();
|
||||
m_OutWindow.PutByte(m_OutWindow.GetByte(rep0));
|
||||
nowPos64++;
|
||||
continue;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
UInt32 distance;
|
||||
if (m_IsRepG1Decoders[state.Index].Decode(m_RangeDecoder) == 0)
|
||||
{
|
||||
distance = rep1;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (m_IsRepG2Decoders[state.Index].Decode(m_RangeDecoder) == 0)
|
||||
distance = rep2;
|
||||
else
|
||||
{
|
||||
distance = rep3;
|
||||
rep3 = rep2;
|
||||
}
|
||||
rep2 = rep1;
|
||||
}
|
||||
rep1 = rep0;
|
||||
rep0 = distance;
|
||||
}
|
||||
len = m_RepLenDecoder.Decode(m_RangeDecoder, posState) + Base.kMatchMinLen;
|
||||
state.UpdateRep();
|
||||
}
|
||||
else
|
||||
{
|
||||
rep3 = rep2;
|
||||
rep2 = rep1;
|
||||
rep1 = rep0;
|
||||
len = Base.kMatchMinLen + m_LenDecoder.Decode(m_RangeDecoder, posState);
|
||||
state.UpdateMatch();
|
||||
uint posSlot = m_PosSlotDecoder[Base.GetLenToPosState(len)].Decode(m_RangeDecoder);
|
||||
if (posSlot >= Base.kStartPosModelIndex)
|
||||
{
|
||||
int numDirectBits = (int)((posSlot >> 1) - 1);
|
||||
rep0 = ((2 | (posSlot & 1)) << numDirectBits);
|
||||
if (posSlot < Base.kEndPosModelIndex)
|
||||
rep0 += BitTreeDecoder.ReverseDecode(m_PosDecoders,
|
||||
rep0 - posSlot - 1, m_RangeDecoder, numDirectBits);
|
||||
else
|
||||
{
|
||||
rep0 += (m_RangeDecoder.DecodeDirectBits(
|
||||
numDirectBits - Base.kNumAlignBits) << Base.kNumAlignBits);
|
||||
rep0 += m_PosAlignDecoder.ReverseDecode(m_RangeDecoder);
|
||||
}
|
||||
}
|
||||
else
|
||||
rep0 = posSlot;
|
||||
}
|
||||
if (rep0 >= m_OutWindow.TrainSize + nowPos64 || rep0 >= m_DictionarySizeCheck)
|
||||
{
|
||||
if (rep0 == 0xFFFFFFFF)
|
||||
break;
|
||||
throw new DataErrorException();
|
||||
}
|
||||
m_OutWindow.CopyBlock(rep0, len);
|
||||
nowPos64 += len;
|
||||
}
|
||||
}
|
||||
}
|
||||
m_OutWindow.Flush();
|
||||
m_OutWindow.ReleaseStream();
|
||||
m_RangeDecoder.ReleaseStream();
|
||||
}
|
||||
|
||||
public void SetDecoderProperties(byte[] properties)
|
||||
{
|
||||
if (properties.Length < 5)
|
||||
throw new InvalidParamException();
|
||||
int lc = properties[0] % 9;
|
||||
int remainder = properties[0] / 9;
|
||||
int lp = remainder % 5;
|
||||
int pb = remainder / 5;
|
||||
if (pb > Base.kNumPosStatesBitsMax)
|
||||
throw new InvalidParamException();
|
||||
UInt32 dictionarySize = 0;
|
||||
for (int i = 0; i < 4; i++)
|
||||
dictionarySize += ((UInt32)(properties[1 + i])) << (i * 8);
|
||||
SetDictionarySize(dictionarySize);
|
||||
SetLiteralProperties(lp, lc);
|
||||
SetPosBitsProperties(pb);
|
||||
}
|
||||
|
||||
public bool Train(System.IO.Stream stream)
|
||||
{
|
||||
_solid = true;
|
||||
return m_OutWindow.Train(stream);
|
||||
}
|
||||
|
||||
/*
|
||||
public override bool CanRead { get { return true; }}
|
||||
public override bool CanWrite { get { return true; }}
|
||||
public override bool CanSeek { get { return true; }}
|
||||
public override long Length { get { return 0; }}
|
||||
public override long Position
|
||||
{
|
||||
get { return 0; }
|
||||
set { }
|
||||
}
|
||||
public override void Flush() { }
|
||||
public override int Read(byte[] buffer, int offset, int count)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
public override void Write(byte[] buffer, int offset, int count)
|
||||
{
|
||||
}
|
||||
public override long Seek(long offset, System.IO.SeekOrigin origin)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
public override void SetLength(long value) {}
|
||||
*/
|
||||
}
|
||||
}
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,47 @@
|
|||
// OutBuffer.cs
|
||||
|
||||
namespace SevenZip.Buffer
|
||||
{
|
||||
public class OutBuffer
|
||||
{
|
||||
byte[] m_Buffer;
|
||||
uint m_Pos;
|
||||
uint m_BufferSize;
|
||||
System.IO.Stream m_Stream;
|
||||
ulong m_ProcessedSize;
|
||||
|
||||
public OutBuffer(uint bufferSize)
|
||||
{
|
||||
m_Buffer = new byte[bufferSize];
|
||||
m_BufferSize = bufferSize;
|
||||
}
|
||||
|
||||
public void SetStream(System.IO.Stream stream) { m_Stream = stream; }
|
||||
public void FlushStream() { m_Stream.Flush(); }
|
||||
public void CloseStream() { m_Stream.Close(); }
|
||||
public void ReleaseStream() { m_Stream = null; }
|
||||
|
||||
public void Init()
|
||||
{
|
||||
m_ProcessedSize = 0;
|
||||
m_Pos = 0;
|
||||
}
|
||||
|
||||
public void WriteByte(byte b)
|
||||
{
|
||||
m_Buffer[m_Pos++] = b;
|
||||
if (m_Pos >= m_BufferSize)
|
||||
FlushData();
|
||||
}
|
||||
|
||||
public void FlushData()
|
||||
{
|
||||
if (m_Pos == 0)
|
||||
return;
|
||||
m_Stream.Write(m_Buffer, 0, (int)m_Pos);
|
||||
m_Pos = 0;
|
||||
}
|
||||
|
||||
public ulong GetProcessedSize() { return m_ProcessedSize + m_Pos; }
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,234 @@
|
|||
using System;
|
||||
|
||||
namespace SevenZip.Compression.RangeCoder
|
||||
{
|
||||
class Encoder
|
||||
{
|
||||
public const uint kTopValue = (1 << 24);
|
||||
|
||||
System.IO.Stream Stream;
|
||||
|
||||
public UInt64 Low;
|
||||
public uint Range;
|
||||
uint _cacheSize;
|
||||
byte _cache;
|
||||
|
||||
long StartPosition;
|
||||
|
||||
public void SetStream(System.IO.Stream stream)
|
||||
{
|
||||
Stream = stream;
|
||||
}
|
||||
|
||||
public void ReleaseStream()
|
||||
{
|
||||
Stream = null;
|
||||
}
|
||||
|
||||
public void Init()
|
||||
{
|
||||
StartPosition = Stream.Position;
|
||||
|
||||
Low = 0;
|
||||
Range = 0xFFFFFFFF;
|
||||
_cacheSize = 1;
|
||||
_cache = 0;
|
||||
}
|
||||
|
||||
public void FlushData()
|
||||
{
|
||||
for (int i = 0; i < 5; i++)
|
||||
ShiftLow();
|
||||
}
|
||||
|
||||
public void FlushStream()
|
||||
{
|
||||
Stream.Flush();
|
||||
}
|
||||
|
||||
public void CloseStream()
|
||||
{
|
||||
Stream.Close();
|
||||
}
|
||||
|
||||
public void Encode(uint start, uint size, uint total)
|
||||
{
|
||||
Low += start * (Range /= total);
|
||||
Range *= size;
|
||||
while (Range < kTopValue)
|
||||
{
|
||||
Range <<= 8;
|
||||
ShiftLow();
|
||||
}
|
||||
}
|
||||
|
||||
public void ShiftLow()
|
||||
{
|
||||
if ((uint)Low < (uint)0xFF000000 || (uint)(Low >> 32) == 1)
|
||||
{
|
||||
byte temp = _cache;
|
||||
do
|
||||
{
|
||||
Stream.WriteByte((byte)(temp + (Low >> 32)));
|
||||
temp = 0xFF;
|
||||
}
|
||||
while (--_cacheSize != 0);
|
||||
_cache = (byte)(((uint)Low) >> 24);
|
||||
}
|
||||
_cacheSize++;
|
||||
Low = ((uint)Low) << 8;
|
||||
}
|
||||
|
||||
public void EncodeDirectBits(uint v, int numTotalBits)
|
||||
{
|
||||
for (int i = numTotalBits - 1; i >= 0; i--)
|
||||
{
|
||||
Range >>= 1;
|
||||
if (((v >> i) & 1) == 1)
|
||||
Low += Range;
|
||||
if (Range < kTopValue)
|
||||
{
|
||||
Range <<= 8;
|
||||
ShiftLow();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public void EncodeBit(uint size0, int numTotalBits, uint symbol)
|
||||
{
|
||||
uint newBound = (Range >> numTotalBits) * size0;
|
||||
if (symbol == 0)
|
||||
Range = newBound;
|
||||
else
|
||||
{
|
||||
Low += newBound;
|
||||
Range -= newBound;
|
||||
}
|
||||
while (Range < kTopValue)
|
||||
{
|
||||
Range <<= 8;
|
||||
ShiftLow();
|
||||
}
|
||||
}
|
||||
|
||||
public long GetProcessedSizeAdd()
|
||||
{
|
||||
return _cacheSize +
|
||||
Stream.Position - StartPosition + 4;
|
||||
// (long)Stream.GetProcessedSize();
|
||||
}
|
||||
}
|
||||
|
||||
class Decoder
|
||||
{
|
||||
public const uint kTopValue = (1 << 24);
|
||||
public uint Range;
|
||||
public uint Code;
|
||||
// public Buffer.InBuffer Stream = new Buffer.InBuffer(1 << 16);
|
||||
public System.IO.Stream Stream;
|
||||
|
||||
public void Init(System.IO.Stream stream)
|
||||
{
|
||||
// Stream.Init(stream);
|
||||
Stream = stream;
|
||||
|
||||
Code = 0;
|
||||
Range = 0xFFFFFFFF;
|
||||
for (int i = 0; i < 5; i++)
|
||||
Code = (Code << 8) | (byte)Stream.ReadByte();
|
||||
}
|
||||
|
||||
public void ReleaseStream()
|
||||
{
|
||||
// Stream.ReleaseStream();
|
||||
Stream = null;
|
||||
}
|
||||
|
||||
public void CloseStream()
|
||||
{
|
||||
Stream.Close();
|
||||
}
|
||||
|
||||
public void Normalize()
|
||||
{
|
||||
while (Range < kTopValue)
|
||||
{
|
||||
Code = (Code << 8) | (byte)Stream.ReadByte();
|
||||
Range <<= 8;
|
||||
}
|
||||
}
|
||||
|
||||
public void Normalize2()
|
||||
{
|
||||
if (Range < kTopValue)
|
||||
{
|
||||
Code = (Code << 8) | (byte)Stream.ReadByte();
|
||||
Range <<= 8;
|
||||
}
|
||||
}
|
||||
|
||||
public uint GetThreshold(uint total)
|
||||
{
|
||||
return Code / (Range /= total);
|
||||
}
|
||||
|
||||
public void Decode(uint start, uint size, uint total)
|
||||
{
|
||||
Code -= start * Range;
|
||||
Range *= size;
|
||||
Normalize();
|
||||
}
|
||||
|
||||
public uint DecodeDirectBits(int numTotalBits)
|
||||
{
|
||||
uint range = Range;
|
||||
uint code = Code;
|
||||
uint result = 0;
|
||||
for (int i = numTotalBits; i > 0; i--)
|
||||
{
|
||||
range >>= 1;
|
||||
/*
|
||||
result <<= 1;
|
||||
if (code >= range)
|
||||
{
|
||||
code -= range;
|
||||
result |= 1;
|
||||
}
|
||||
*/
|
||||
uint t = (code - range) >> 31;
|
||||
code -= range & (t - 1);
|
||||
result = (result << 1) | (1 - t);
|
||||
|
||||
if (range < kTopValue)
|
||||
{
|
||||
code = (code << 8) | (byte)Stream.ReadByte();
|
||||
range <<= 8;
|
||||
}
|
||||
}
|
||||
Range = range;
|
||||
Code = code;
|
||||
return result;
|
||||
}
|
||||
|
||||
public uint DecodeBit(uint size0, int numTotalBits)
|
||||
{
|
||||
uint newBound = (Range >> numTotalBits) * size0;
|
||||
uint symbol;
|
||||
if (Code < newBound)
|
||||
{
|
||||
symbol = 0;
|
||||
Range = newBound;
|
||||
}
|
||||
else
|
||||
{
|
||||
symbol = 1;
|
||||
Code -= newBound;
|
||||
Range -= newBound;
|
||||
}
|
||||
Normalize();
|
||||
return symbol;
|
||||
}
|
||||
|
||||
// ulong GetProcessedSize() {return Stream.GetProcessedSize(); }
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,117 @@
|
|||
using System;
|
||||
|
||||
namespace SevenZip.Compression.RangeCoder
|
||||
{
|
||||
struct BitEncoder
|
||||
{
|
||||
public const int kNumBitModelTotalBits = 11;
|
||||
public const uint kBitModelTotal = (1 << kNumBitModelTotalBits);
|
||||
const int kNumMoveBits = 5;
|
||||
const int kNumMoveReducingBits = 2;
|
||||
public const int kNumBitPriceShiftBits = 6;
|
||||
|
||||
uint Prob;
|
||||
|
||||
public void Init() { Prob = kBitModelTotal >> 1; }
|
||||
|
||||
public void UpdateModel(uint symbol)
|
||||
{
|
||||
if (symbol == 0)
|
||||
Prob += (kBitModelTotal - Prob) >> kNumMoveBits;
|
||||
else
|
||||
Prob -= (Prob) >> kNumMoveBits;
|
||||
}
|
||||
|
||||
public void Encode(Encoder encoder, uint symbol)
|
||||
{
|
||||
// encoder.EncodeBit(Prob, kNumBitModelTotalBits, symbol);
|
||||
// UpdateModel(symbol);
|
||||
uint newBound = (encoder.Range >> kNumBitModelTotalBits) * Prob;
|
||||
if (symbol == 0)
|
||||
{
|
||||
encoder.Range = newBound;
|
||||
Prob += (kBitModelTotal - Prob) >> kNumMoveBits;
|
||||
}
|
||||
else
|
||||
{
|
||||
encoder.Low += newBound;
|
||||
encoder.Range -= newBound;
|
||||
Prob -= (Prob) >> kNumMoveBits;
|
||||
}
|
||||
if (encoder.Range < Encoder.kTopValue)
|
||||
{
|
||||
encoder.Range <<= 8;
|
||||
encoder.ShiftLow();
|
||||
}
|
||||
}
|
||||
|
||||
private static UInt32[] ProbPrices = new UInt32[kBitModelTotal >> kNumMoveReducingBits];
|
||||
|
||||
static BitEncoder()
|
||||
{
|
||||
const int kNumBits = (kNumBitModelTotalBits - kNumMoveReducingBits);
|
||||
for (int i = kNumBits - 1; i >= 0; i--)
|
||||
{
|
||||
UInt32 start = (UInt32)1 << (kNumBits - i - 1);
|
||||
UInt32 end = (UInt32)1 << (kNumBits - i);
|
||||
for (UInt32 j = start; j < end; j++)
|
||||
ProbPrices[j] = ((UInt32)i << kNumBitPriceShiftBits) +
|
||||
(((end - j) << kNumBitPriceShiftBits) >> (kNumBits - i - 1));
|
||||
}
|
||||
}
|
||||
|
||||
public uint GetPrice(uint symbol)
|
||||
{
|
||||
return ProbPrices[(((Prob - symbol) ^ ((-(int)symbol))) & (kBitModelTotal - 1)) >> kNumMoveReducingBits];
|
||||
}
|
||||
public uint GetPrice0() { return ProbPrices[Prob >> kNumMoveReducingBits]; }
|
||||
public uint GetPrice1() { return ProbPrices[(kBitModelTotal - Prob) >> kNumMoveReducingBits]; }
|
||||
}
|
||||
|
||||
struct BitDecoder
|
||||
{
|
||||
public const int kNumBitModelTotalBits = 11;
|
||||
public const uint kBitModelTotal = (1 << kNumBitModelTotalBits);
|
||||
const int kNumMoveBits = 5;
|
||||
|
||||
uint Prob;
|
||||
|
||||
public void UpdateModel(int numMoveBits, uint symbol)
|
||||
{
|
||||
if (symbol == 0)
|
||||
Prob += (kBitModelTotal - Prob) >> numMoveBits;
|
||||
else
|
||||
Prob -= (Prob) >> numMoveBits;
|
||||
}
|
||||
|
||||
public void Init() { Prob = kBitModelTotal >> 1; }
|
||||
|
||||
public uint Decode(RangeCoder.Decoder rangeDecoder)
|
||||
{
|
||||
uint newBound = (uint)(rangeDecoder.Range >> kNumBitModelTotalBits) * (uint)Prob;
|
||||
if (rangeDecoder.Code < newBound)
|
||||
{
|
||||
rangeDecoder.Range = newBound;
|
||||
Prob += (kBitModelTotal - Prob) >> kNumMoveBits;
|
||||
if (rangeDecoder.Range < Decoder.kTopValue)
|
||||
{
|
||||
rangeDecoder.Code = (rangeDecoder.Code << 8) | (byte)rangeDecoder.Stream.ReadByte();
|
||||
rangeDecoder.Range <<= 8;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
rangeDecoder.Range -= newBound;
|
||||
rangeDecoder.Code -= newBound;
|
||||
Prob -= (Prob) >> kNumMoveBits;
|
||||
if (rangeDecoder.Range < Decoder.kTopValue)
|
||||
{
|
||||
rangeDecoder.Code = (rangeDecoder.Code << 8) | (byte)rangeDecoder.Stream.ReadByte();
|
||||
rangeDecoder.Range <<= 8;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,157 @@
|
|||
using System;
|
||||
|
||||
namespace SevenZip.Compression.RangeCoder
|
||||
{
|
||||
struct BitTreeEncoder
|
||||
{
|
||||
BitEncoder[] Models;
|
||||
int NumBitLevels;
|
||||
|
||||
public BitTreeEncoder(int numBitLevels)
|
||||
{
|
||||
NumBitLevels = numBitLevels;
|
||||
Models = new BitEncoder[1 << numBitLevels];
|
||||
}
|
||||
|
||||
public void Init()
|
||||
{
|
||||
for (uint i = 1; i < (1 << NumBitLevels); i++)
|
||||
Models[i].Init();
|
||||
}
|
||||
|
||||
public void Encode(Encoder rangeEncoder, UInt32 symbol)
|
||||
{
|
||||
UInt32 m = 1;
|
||||
for (int bitIndex = NumBitLevels; bitIndex > 0; )
|
||||
{
|
||||
bitIndex--;
|
||||
UInt32 bit = (symbol >> bitIndex) & 1;
|
||||
Models[m].Encode(rangeEncoder, bit);
|
||||
m = (m << 1) | bit;
|
||||
}
|
||||
}
|
||||
|
||||
public void ReverseEncode(Encoder rangeEncoder, UInt32 symbol)
|
||||
{
|
||||
UInt32 m = 1;
|
||||
for (UInt32 i = 0; i < NumBitLevels; i++)
|
||||
{
|
||||
UInt32 bit = symbol & 1;
|
||||
Models[m].Encode(rangeEncoder, bit);
|
||||
m = (m << 1) | bit;
|
||||
symbol >>= 1;
|
||||
}
|
||||
}
|
||||
|
||||
public UInt32 GetPrice(UInt32 symbol)
|
||||
{
|
||||
UInt32 price = 0;
|
||||
UInt32 m = 1;
|
||||
for (int bitIndex = NumBitLevels; bitIndex > 0; )
|
||||
{
|
||||
bitIndex--;
|
||||
UInt32 bit = (symbol >> bitIndex) & 1;
|
||||
price += Models[m].GetPrice(bit);
|
||||
m = (m << 1) + bit;
|
||||
}
|
||||
return price;
|
||||
}
|
||||
|
||||
public UInt32 ReverseGetPrice(UInt32 symbol)
|
||||
{
|
||||
UInt32 price = 0;
|
||||
UInt32 m = 1;
|
||||
for (int i = NumBitLevels; i > 0; i--)
|
||||
{
|
||||
UInt32 bit = symbol & 1;
|
||||
symbol >>= 1;
|
||||
price += Models[m].GetPrice(bit);
|
||||
m = (m << 1) | bit;
|
||||
}
|
||||
return price;
|
||||
}
|
||||
|
||||
public static UInt32 ReverseGetPrice(BitEncoder[] Models, UInt32 startIndex,
|
||||
int NumBitLevels, UInt32 symbol)
|
||||
{
|
||||
UInt32 price = 0;
|
||||
UInt32 m = 1;
|
||||
for (int i = NumBitLevels; i > 0; i--)
|
||||
{
|
||||
UInt32 bit = symbol & 1;
|
||||
symbol >>= 1;
|
||||
price += Models[startIndex + m].GetPrice(bit);
|
||||
m = (m << 1) | bit;
|
||||
}
|
||||
return price;
|
||||
}
|
||||
|
||||
public static void ReverseEncode(BitEncoder[] Models, UInt32 startIndex,
|
||||
Encoder rangeEncoder, int NumBitLevels, UInt32 symbol)
|
||||
{
|
||||
UInt32 m = 1;
|
||||
for (int i = 0; i < NumBitLevels; i++)
|
||||
{
|
||||
UInt32 bit = symbol & 1;
|
||||
Models[startIndex + m].Encode(rangeEncoder, bit);
|
||||
m = (m << 1) | bit;
|
||||
symbol >>= 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct BitTreeDecoder
|
||||
{
|
||||
BitDecoder[] Models;
|
||||
int NumBitLevels;
|
||||
|
||||
public BitTreeDecoder(int numBitLevels)
|
||||
{
|
||||
NumBitLevels = numBitLevels;
|
||||
Models = new BitDecoder[1 << numBitLevels];
|
||||
}
|
||||
|
||||
public void Init()
|
||||
{
|
||||
for (uint i = 1; i < (1 << NumBitLevels); i++)
|
||||
Models[i].Init();
|
||||
}
|
||||
|
||||
public uint Decode(RangeCoder.Decoder rangeDecoder)
|
||||
{
|
||||
uint m = 1;
|
||||
for (int bitIndex = NumBitLevels; bitIndex > 0; bitIndex--)
|
||||
m = (m << 1) + Models[m].Decode(rangeDecoder);
|
||||
return m - ((uint)1 << NumBitLevels);
|
||||
}
|
||||
|
||||
public uint ReverseDecode(RangeCoder.Decoder rangeDecoder)
|
||||
{
|
||||
uint m = 1;
|
||||
uint symbol = 0;
|
||||
for (int bitIndex = 0; bitIndex < NumBitLevels; bitIndex++)
|
||||
{
|
||||
uint bit = Models[m].Decode(rangeDecoder);
|
||||
m <<= 1;
|
||||
m += bit;
|
||||
symbol |= (bit << bitIndex);
|
||||
}
|
||||
return symbol;
|
||||
}
|
||||
|
||||
public static uint ReverseDecode(BitDecoder[] Models, UInt32 startIndex,
|
||||
RangeCoder.Decoder rangeDecoder, int NumBitLevels)
|
||||
{
|
||||
uint m = 1;
|
||||
uint symbol = 0;
|
||||
for (int bitIndex = 0; bitIndex < NumBitLevels; bitIndex++)
|
||||
{
|
||||
uint bit = Models[startIndex + m].Decode(rangeDecoder);
|
||||
m <<= 1;
|
||||
m += bit;
|
||||
symbol |= (bit << bitIndex);
|
||||
}
|
||||
return symbol;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -97,6 +97,21 @@
|
|||
<Reference Include="System.Xml" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<Compile Include="7-Zip SDK\CommandLineParser.cs" />
|
||||
<Compile Include="7-Zip SDK\CRC.cs" />
|
||||
<Compile Include="7-Zip SDK\ICoder.cs" />
|
||||
<Compile Include="7-Zip SDK\IMatchFinder.cs" />
|
||||
<Compile Include="7-Zip SDK\InBuffer.cs" />
|
||||
<Compile Include="7-Zip SDK\LzBinTree.cs" />
|
||||
<Compile Include="7-Zip SDK\LzInWindow.cs" />
|
||||
<Compile Include="7-Zip SDK\LzmaBase.cs" />
|
||||
<Compile Include="7-Zip SDK\LzmaDecoder.cs" />
|
||||
<Compile Include="7-Zip SDK\LzmaEncoder.cs" />
|
||||
<Compile Include="7-Zip SDK\LzOutWindow.cs" />
|
||||
<Compile Include="7-Zip SDK\OutBuffer.cs" />
|
||||
<Compile Include="7-Zip SDK\RangeCoder.cs" />
|
||||
<Compile Include="7-Zip SDK\RangeCoderBit.cs" />
|
||||
<Compile Include="7-Zip SDK\RangeCoderBitTree.cs" />
|
||||
<Compile Include="addBackupWizard.cs">
|
||||
<SubType>Form</SubType>
|
||||
</Compile>
|
||||
|
|
@ -255,6 +270,7 @@
|
|||
<FileType>Assembly</FileType>
|
||||
</PublishFile>
|
||||
</ItemGroup>
|
||||
<ItemGroup />
|
||||
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
|
||||
<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
|
||||
Other similar extension points exist, see Microsoft.Common.targets.
|
||||
|
|
|
|||
Reference in New Issue