diff options
Diffstat (limited to 'other-licenses/7zstub/src/Java/SevenZip/Compression')
10 files changed, 2824 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/Java/SevenZip/Compression/LZ/BinTree.java b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZ/BinTree.java new file mode 100644 index 0000000000..63d58c05a0 --- /dev/null +++ b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZ/BinTree.java @@ -0,0 +1,382 @@ +// LZ.BinTree
+
+package SevenZip.Compression.LZ;
+import java.io.IOException;
+
+
+public class BinTree extends InWindow
+{
+ int _cyclicBufferPos;
+ int _cyclicBufferSize = 0;
+ int _matchMaxLen;
+
+ int[] _son;
+ int[] _hash;
+
+ int _cutValue = 0xFF;
+ int _hashMask;
+ int _hashSizeSum = 0;
+
+ boolean HASH_ARRAY = true;
+
+ static final int kHash2Size = 1 << 10;
+ static final int kHash3Size = 1 << 16;
+ static final int kBT2HashSize = 1 << 16;
+ static final int kStartMaxLen = 1;
+ static final int kHash3Offset = kHash2Size;
+ static final int kEmptyHashValue = 0;
+ static final int kMaxValForNormalize = (1 << 30) - 1;
+
+ int kNumHashDirectBytes = 0;
+ int kMinMatchCheck = 4;
+ int 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 void Init() throws IOException
+ {
+ super.Init();
+ for (int i = 0; i < _hashSizeSum; i++)
+ _hash[i] = kEmptyHashValue;
+ _cyclicBufferPos = 0;
+ ReduceOffsets(-1);
+ }
+
+ public void MovePos() throws IOException
+ {
+ if (++_cyclicBufferPos >= _cyclicBufferSize)
+ _cyclicBufferPos = 0;
+ super.MovePos();
+ if (_pos == kMaxValForNormalize)
+ Normalize();
+ }
+
+
+
+
+
+
+
+
+ public boolean Create(int historySize, int keepAddBufferBefore,
+ int matchMaxLen, int keepAddBufferAfter)
+ {
+ if (historySize > kMaxValForNormalize - 256)
+ return false;
+ _cutValue = 16 + (matchMaxLen >> 1);
+
+ int windowReservSize = (historySize + keepAddBufferBefore +
+ matchMaxLen + keepAddBufferAfter) / 2 + 256;
+
+ super.Create(historySize + keepAddBufferBefore, matchMaxLen + keepAddBufferAfter, windowReservSize);
+
+ _matchMaxLen = matchMaxLen;
+
+ int cyclicBufferSize = historySize + 1;
+ if (_cyclicBufferSize != cyclicBufferSize)
+ _son = new int[(_cyclicBufferSize = cyclicBufferSize) * 2];
+
+ int 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 int [_hashSizeSum = hs];
+ return true;
+ }
+ public int GetMatches(int[] distances) throws IOException
+ {
+ int lenLimit;
+ if (_pos + _matchMaxLen <= _streamPos)
+ lenLimit = _matchMaxLen;
+ else
+ {
+ lenLimit = _streamPos - _pos;
+ if (lenLimit < kMinMatchCheck)
+ {
+ MovePos();
+ return 0;
+ }
+ }
+
+ int offset = 0;
+ int matchMinPos = (_pos > _cyclicBufferSize) ? (_pos - _cyclicBufferSize) : 0;
+ int cur = _bufferOffset + _pos;
+ int maxLen = kStartMaxLen; // to avoid items for len < hashSize;
+ int hashValue, hash2Value = 0, hash3Value = 0;
+
+ if (HASH_ARRAY)
+ {
+ int temp = CrcTable[_bufferBase[cur] & 0xFF] ^ (_bufferBase[cur + 1] & 0xFF);
+ hash2Value = temp & (kHash2Size - 1);
+ temp ^= ((int)(_bufferBase[cur + 2] & 0xFF) << 8);
+ hash3Value = temp & (kHash3Size - 1);
+ hashValue = (temp ^ (CrcTable[_bufferBase[cur + 3] & 0xFF] << 5)) & _hashMask;
+ }
+ else
+ hashValue = ((_bufferBase[cur] & 0xFF) ^ ((int)(_bufferBase[cur + 1] & 0xFF) << 8));
+
+ int curMatch = _hash[kFixHashSize + hashValue];
+ if (HASH_ARRAY)
+ {
+ int curMatch2 = _hash[hash2Value];
+ int 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;
+
+ int ptr0 = (_cyclicBufferPos << 1) + 1;
+ int ptr1 = (_cyclicBufferPos << 1);
+
+ int 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;
+ }
+ }
+ }
+
+ int count = _cutValue;
+
+ while (true)
+ {
+ if (curMatch <= matchMinPos || count-- == 0)
+ {
+ _son[ptr0] = _son[ptr1] = kEmptyHashValue;
+ break;
+ }
+ int delta = _pos - curMatch;
+ int cyclicPos = ((delta <= _cyclicBufferPos) ?
+ (_cyclicBufferPos - delta) :
+ (_cyclicBufferPos - delta + _cyclicBufferSize)) << 1;
+
+ int pby1 = _bufferOffset + curMatch;
+ int 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] & 0xFF) < (_bufferBase[cur + len] & 0xFF))
+ {
+ _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(int num) throws IOException
+ {
+ do
+ {
+ int lenLimit;
+ if (_pos + _matchMaxLen <= _streamPos)
+ lenLimit = _matchMaxLen;
+ else
+ {
+ lenLimit = _streamPos - _pos;
+ if (lenLimit < kMinMatchCheck)
+ {
+ MovePos();
+ continue;
+ }
+ }
+
+ int matchMinPos = (_pos > _cyclicBufferSize) ? (_pos - _cyclicBufferSize) : 0;
+ int cur = _bufferOffset + _pos;
+
+ int hashValue;
+
+ if (HASH_ARRAY)
+ {
+ int temp = CrcTable[_bufferBase[cur] & 0xFF] ^ (_bufferBase[cur + 1] & 0xFF);
+ int hash2Value = temp & (kHash2Size - 1);
+ _hash[hash2Value] = _pos;
+ temp ^= ((int)(_bufferBase[cur + 2] & 0xFF) << 8);
+ int hash3Value = temp & (kHash3Size - 1);
+ _hash[kHash3Offset + hash3Value] = _pos;
+ hashValue = (temp ^ (CrcTable[_bufferBase[cur + 3] & 0xFF] << 5)) & _hashMask;
+ }
+ else
+ hashValue = ((_bufferBase[cur] & 0xFF) ^ ((int)(_bufferBase[cur + 1] & 0xFF) << 8));
+
+ int curMatch = _hash[kFixHashSize + hashValue];
+ _hash[kFixHashSize + hashValue] = _pos;
+
+ int ptr0 = (_cyclicBufferPos << 1) + 1;
+ int ptr1 = (_cyclicBufferPos << 1);
+
+ int len0, len1;
+ len0 = len1 = kNumHashDirectBytes;
+
+ int count = _cutValue;
+ while (true)
+ {
+ if (curMatch <= matchMinPos || count-- == 0)
+ {
+ _son[ptr0] = _son[ptr1] = kEmptyHashValue;
+ break;
+ }
+
+ int delta = _pos - curMatch;
+ int cyclicPos = ((delta <= _cyclicBufferPos) ?
+ (_cyclicBufferPos - delta) :
+ (_cyclicBufferPos - delta + _cyclicBufferSize)) << 1;
+
+ int pby1 = _bufferOffset + curMatch;
+ int 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] & 0xFF) < (_bufferBase[cur + len] & 0xFF))
+ {
+ _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(int[] items, int numItems, int subValue)
+ {
+ for (int i = 0; i < numItems; i++)
+ {
+ int value = items[i];
+ if (value <= subValue)
+ value = kEmptyHashValue;
+ else
+ value -= subValue;
+ items[i] = value;
+ }
+ }
+
+ void Normalize()
+ {
+ int subValue = _pos - _cyclicBufferSize;
+ NormalizeLinks(_son, _cyclicBufferSize * 2, subValue);
+ NormalizeLinks(_hash, _hashSizeSum, subValue);
+ ReduceOffsets(subValue);
+ }
+
+ public void SetCutValue(int cutValue) { _cutValue = cutValue; }
+
+ private static final int[] CrcTable = new int[256];
+
+ static
+ {
+ for (int i = 0; i < 256; i++)
+ {
+ int r = i;
+ for (int j = 0; j < 8; j++)
+ if ((r & 1) != 0)
+ r = (r >>> 1) ^ 0xEDB88320;
+ else
+ r >>>= 1;
+ CrcTable[i] = r;
+ }
+ }
+}
diff --git a/other-licenses/7zstub/src/Java/SevenZip/Compression/LZ/InWindow.java b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZ/InWindow.java new file mode 100644 index 0000000000..5f3f0b4d09 --- /dev/null +++ b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZ/InWindow.java @@ -0,0 +1,131 @@ +// LZ.InWindow
+
+package SevenZip.Compression.LZ;
+
+import java.io.IOException;
+
+public class InWindow
+{
+ public byte[] _bufferBase; // pointer to buffer with data
+ java.io.InputStream _stream;
+ int _posLimit; // offset (from _buffer) of first byte when new block reading must be done
+ boolean _streamEndWasReached; // if (true) then _streamPos shows real end of stream
+
+ int _pointerToLastSafePosition;
+
+ public int _bufferOffset;
+
+ public int _blockSize; // Size of Allocated memory block
+ public int _pos; // offset (from _buffer) of curent byte
+ int _keepSizeBefore; // how many BYTEs must be kept in buffer before _pos
+ int _keepSizeAfter; // how many BYTEs must be kept buffer after _pos
+ public int _streamPos; // offset (from _buffer) of first not read byte from Stream
+
+ public void MoveBlock()
+ {
+ int offset = _bufferOffset + _pos - _keepSizeBefore;
+ // we need one additional byte, since MovePos moves on 1 byte.
+ if (offset > 0)
+ offset--;
+
+ int numBytes = _bufferOffset + _streamPos - offset;
+
+ // check negative offset ????
+ for (int i = 0; i < numBytes; i++)
+ _bufferBase[i] = _bufferBase[offset + i];
+ _bufferOffset -= offset;
+ }
+
+ public void ReadBlock() throws IOException
+ {
+ if (_streamEndWasReached)
+ return;
+ while (true)
+ {
+ int size = (0 - _bufferOffset) + _blockSize - _streamPos;
+ if (size == 0)
+ return;
+ int numReadBytes = _stream.read(_bufferBase, _bufferOffset + _streamPos, size);
+ if (numReadBytes == -1)
+ {
+ _posLimit = _streamPos;
+ int pointerToPostion = _bufferOffset + _posLimit;
+ if (pointerToPostion > _pointerToLastSafePosition)
+ _posLimit = _pointerToLastSafePosition - _bufferOffset;
+
+ _streamEndWasReached = true;
+ return;
+ }
+ _streamPos += numReadBytes;
+ if (_streamPos >= _pos + _keepSizeAfter)
+ _posLimit = _streamPos - _keepSizeAfter;
+ }
+ }
+
+ void Free() { _bufferBase = null; }
+
+ public void Create(int keepSizeBefore, int keepSizeAfter, int keepSizeReserv)
+ {
+ _keepSizeBefore = keepSizeBefore;
+ _keepSizeAfter = keepSizeAfter;
+ int blockSize = keepSizeBefore + keepSizeAfter + keepSizeReserv;
+ if (_bufferBase == null || _blockSize != blockSize)
+ {
+ Free();
+ _blockSize = blockSize;
+ _bufferBase = new byte[_blockSize];
+ }
+ _pointerToLastSafePosition = _blockSize - keepSizeAfter;
+ }
+
+ public void SetStream(java.io.InputStream stream) { _stream = stream; }
+ public void ReleaseStream() { _stream = null; }
+
+ public void Init() throws IOException
+ {
+ _bufferOffset = 0;
+ _pos = 0;
+ _streamPos = 0;
+ _streamEndWasReached = false;
+ ReadBlock();
+ }
+
+ public void MovePos() throws IOException
+ {
+ _pos++;
+ if (_pos > _posLimit)
+ {
+ int pointerToPostion = _bufferOffset + _pos;
+ if (pointerToPostion > _pointerToLastSafePosition)
+ MoveBlock();
+ ReadBlock();
+ }
+ }
+
+ public byte GetIndexByte(int index) { return _bufferBase[_bufferOffset + _pos + index]; }
+
+ // index + limit have not to exceed _keepSizeAfter;
+ public int GetMatchLen(int index, int distance, int limit)
+ {
+ if (_streamEndWasReached)
+ if ((_pos + index) + limit > _streamPos)
+ limit = _streamPos - (_pos + index);
+ distance++;
+ // Byte *pby = _buffer + (size_t)_pos + index;
+ int pby = _bufferOffset + _pos + index;
+
+ int i;
+ for (i = 0; i < limit && _bufferBase[pby + i] == _bufferBase[pby + i - distance]; i++);
+ return i;
+ }
+
+ public int GetNumAvailableBytes() { return _streamPos - _pos; }
+
+ public void ReduceOffsets(int subValue)
+ {
+ _bufferOffset += subValue;
+ _posLimit -= subValue;
+ _pos -= subValue;
+ _streamPos -= subValue;
+ }
+}
diff --git a/other-licenses/7zstub/src/Java/SevenZip/Compression/LZ/OutWindow.java b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZ/OutWindow.java new file mode 100644 index 0000000000..620cb41b47 --- /dev/null +++ b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZ/OutWindow.java @@ -0,0 +1,85 @@ +// LZ.OutWindow
+
+package SevenZip.Compression.LZ;
+
+import java.io.IOException;
+
+public class OutWindow
+{
+ byte[] _buffer;
+ int _pos;
+ int _windowSize = 0;
+ int _streamPos;
+ java.io.OutputStream _stream;
+
+ public void Create(int windowSize)
+ {
+ if (_buffer == null || _windowSize != windowSize)
+ _buffer = new byte[windowSize];
+ _windowSize = windowSize;
+ _pos = 0;
+ _streamPos = 0;
+ }
+
+ public void SetStream(java.io.OutputStream stream) throws IOException
+ {
+ ReleaseStream();
+ _stream = stream;
+ }
+
+ public void ReleaseStream() throws IOException
+ {
+ Flush();
+ _stream = null;
+ }
+
+ public void Init(boolean solid)
+ {
+ if (!solid)
+ {
+ _streamPos = 0;
+ _pos = 0;
+ }
+ }
+
+ public void Flush() throws IOException
+ {
+ int size = _pos - _streamPos;
+ if (size == 0)
+ return;
+ _stream.write(_buffer, _streamPos, size);
+ if (_pos >= _windowSize)
+ _pos = 0;
+ _streamPos = _pos;
+ }
+
+ public void CopyBlock(int distance, int len) throws IOException
+ {
+ int pos = _pos - distance - 1;
+ if (pos < 0)
+ pos += _windowSize;
+ for (; len != 0; len--)
+ {
+ if (pos >= _windowSize)
+ pos = 0;
+ _buffer[_pos++] = _buffer[pos++];
+ if (_pos >= _windowSize)
+ Flush();
+ }
+ }
+
+ public void PutByte(byte b) throws IOException
+ {
+ _buffer[_pos++] = b;
+ if (_pos >= _windowSize)
+ Flush();
+ }
+
+ public byte GetByte(int distance)
+ {
+ int pos = _pos - distance - 1;
+ if (pos < 0)
+ pos += _windowSize;
+ return _buffer[pos];
+ }
+}
diff --git a/other-licenses/7zstub/src/Java/SevenZip/Compression/LZMA/Base.java b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZMA/Base.java new file mode 100644 index 0000000000..18deed9232 --- /dev/null +++ b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZMA/Base.java @@ -0,0 +1,88 @@ +// Base.java
+
+package SevenZip.Compression.LZMA;
+
+public class Base
+{
+ public static final int kNumRepDistances = 4;
+ public static final int kNumStates = 12;
+
+ public static final int StateInit()
+ {
+ return 0;
+ }
+
+ public static final int StateUpdateChar(int index)
+ {
+ if (index < 4)
+ return 0;
+ if (index < 10)
+ return index - 3;
+ return index - 6;
+ }
+
+ public static final int StateUpdateMatch(int index)
+ {
+ return (index < 7 ? 7 : 10);
+ }
+
+ public static final int StateUpdateRep(int index)
+ {
+ return (index < 7 ? 8 : 11);
+ }
+
+ public static final int StateUpdateShortRep(int index)
+ {
+ return (index < 7 ? 9 : 11);
+ }
+
+ public static final boolean StateIsCharState(int index)
+ {
+ return index < 7;
+ }
+
+ public static final int kNumPosSlotBits = 6;
+ public static final int kDicLogSizeMin = 0;
+ // public static final int kDicLogSizeMax = 28;
+ // public static final int kDistTableSizeMax = kDicLogSizeMax * 2;
+
+ public static final int kNumLenToPosStatesBits = 2; // it's for speed optimization
+ public static final int kNumLenToPosStates = 1 << kNumLenToPosStatesBits;
+
+ public static final int kMatchMinLen = 2;
+
+ public static final int GetLenToPosState(int len)
+ {
+ len -= kMatchMinLen;
+ if (len < kNumLenToPosStates)
+ return len;
+ return (int)(kNumLenToPosStates - 1);
+ }
+
+ public static final int kNumAlignBits = 4;
+ public static final int kAlignTableSize = 1 << kNumAlignBits;
+ public static final int kAlignMask = (kAlignTableSize - 1);
+
+ public static final int kStartPosModelIndex = 4;
+ public static final int kEndPosModelIndex = 14;
+ public static final int kNumPosModels = kEndPosModelIndex - kStartPosModelIndex;
+
+ public static final int kNumFullDistances = 1 << (kEndPosModelIndex / 2);
+
+ public static final int kNumLitPosStatesBitsEncodingMax = 4;
+ public static final int kNumLitContextBitsMax = 8;
+
+ public static final int kNumPosStatesBitsMax = 4;
+ public static final int kNumPosStatesMax = (1 << kNumPosStatesBitsMax);
+ public static final int kNumPosStatesBitsEncodingMax = 4;
+ public static final int kNumPosStatesEncodingMax = (1 << kNumPosStatesBitsEncodingMax);
+
+ public static final int kNumLowLenBits = 3;
+ public static final int kNumMidLenBits = 3;
+ public static final int kNumHighLenBits = 8;
+ public static final int kNumLowLenSymbols = 1 << kNumLowLenBits;
+ public static final int kNumMidLenSymbols = 1 << kNumMidLenBits;
+ public static final int kNumLenSymbols = kNumLowLenSymbols + kNumMidLenSymbols +
+ (1 << kNumHighLenBits);
+ public static final int kMatchMaxLen = kMatchMinLen + kNumLenSymbols - 1;
+}
diff --git a/other-licenses/7zstub/src/Java/SevenZip/Compression/LZMA/Decoder.java b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZMA/Decoder.java new file mode 100644 index 0000000000..4ebd571106 --- /dev/null +++ b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZMA/Decoder.java @@ -0,0 +1,329 @@ +package SevenZip.Compression.LZMA;
+
+import SevenZip.Compression.RangeCoder.BitTreeDecoder;
+import SevenZip.Compression.LZMA.Base;
+import SevenZip.Compression.LZ.OutWindow;
+import java.io.IOException;
+
+public class Decoder
+{
+ class LenDecoder
+ {
+ short[] m_Choice = new short[2];
+ BitTreeDecoder[] m_LowCoder = new BitTreeDecoder[Base.kNumPosStatesMax];
+ BitTreeDecoder[] m_MidCoder = new BitTreeDecoder[Base.kNumPosStatesMax];
+ BitTreeDecoder m_HighCoder = new BitTreeDecoder(Base.kNumHighLenBits);
+ int m_NumPosStates = 0;
+
+ public void Create(int numPosStates)
+ {
+ for (; m_NumPosStates < numPosStates; m_NumPosStates++)
+ {
+ m_LowCoder[m_NumPosStates] = new BitTreeDecoder(Base.kNumLowLenBits);
+ m_MidCoder[m_NumPosStates] = new BitTreeDecoder(Base.kNumMidLenBits);
+ }
+ }
+
+ public void Init()
+ {
+ SevenZip.Compression.RangeCoder.Decoder.InitBitModels(m_Choice);
+ for (int posState = 0; posState < m_NumPosStates; posState++)
+ {
+ m_LowCoder[posState].Init();
+ m_MidCoder[posState].Init();
+ }
+ m_HighCoder.Init();
+ }
+
+ public int Decode(SevenZip.Compression.RangeCoder.Decoder rangeDecoder, int posState) throws IOException
+ {
+ if (rangeDecoder.DecodeBit(m_Choice, 0) == 0)
+ return m_LowCoder[posState].Decode(rangeDecoder);
+ int symbol = Base.kNumLowLenSymbols;
+ if (rangeDecoder.DecodeBit(m_Choice, 1) == 0)
+ symbol += m_MidCoder[posState].Decode(rangeDecoder);
+ else
+ symbol += Base.kNumMidLenSymbols + m_HighCoder.Decode(rangeDecoder);
+ return symbol;
+ }
+ }
+
+ class LiteralDecoder
+ {
+ class Decoder2
+ {
+ short[] m_Decoders = new short[0x300];
+
+ public void Init()
+ {
+ SevenZip.Compression.RangeCoder.Decoder.InitBitModels(m_Decoders);
+ }
+
+ public byte DecodeNormal(SevenZip.Compression.RangeCoder.Decoder rangeDecoder) throws IOException
+ {
+ int symbol = 1;
+ do
+ symbol = (symbol << 1) | rangeDecoder.DecodeBit(m_Decoders, symbol);
+ while (symbol < 0x100);
+ return (byte)symbol;
+ }
+
+ public byte DecodeWithMatchByte(SevenZip.Compression.RangeCoder.Decoder rangeDecoder, byte matchByte) throws IOException
+ {
+ int symbol = 1;
+ do
+ {
+ int matchBit = (matchByte >> 7) & 1;
+ matchByte <<= 1;
+ int bit = rangeDecoder.DecodeBit(m_Decoders, ((1 + matchBit) << 8) + symbol);
+ symbol = (symbol << 1) | bit;
+ if (matchBit != bit)
+ {
+ while (symbol < 0x100)
+ symbol = (symbol << 1) | rangeDecoder.DecodeBit(m_Decoders, symbol);
+ break;
+ }
+ }
+ while (symbol < 0x100);
+ return (byte)symbol;
+ }
+ }
+
+ Decoder2[] m_Coders;
+ int m_NumPrevBits;
+ int m_NumPosBits;
+ int 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 = (1 << numPosBits) - 1;
+ m_NumPrevBits = numPrevBits;
+ int numStates = 1 << (m_NumPrevBits + m_NumPosBits);
+ m_Coders = new Decoder2[numStates];
+ for (int i = 0; i < numStates; i++)
+ m_Coders[i] = new Decoder2();
+ }
+
+ public void Init()
+ {
+ int numStates = 1 << (m_NumPrevBits + m_NumPosBits);
+ for (int i = 0; i < numStates; i++)
+ m_Coders[i].Init();
+ }
+
+ Decoder2 GetDecoder(int pos, byte prevByte)
+ {
+ return m_Coders[((pos & m_PosMask) << m_NumPrevBits) + ((prevByte & 0xFF) >>> (8 - m_NumPrevBits))];
+ }
+ }
+
+ OutWindow m_OutWindow = new OutWindow();
+ SevenZip.Compression.RangeCoder.Decoder m_RangeDecoder = new SevenZip.Compression.RangeCoder.Decoder();
+
+ short[] m_IsMatchDecoders = new short[Base.kNumStates << Base.kNumPosStatesBitsMax];
+ short[] m_IsRepDecoders = new short[Base.kNumStates];
+ short[] m_IsRepG0Decoders = new short[Base.kNumStates];
+ short[] m_IsRepG1Decoders = new short[Base.kNumStates];
+ short[] m_IsRepG2Decoders = new short[Base.kNumStates];
+ short[] m_IsRep0LongDecoders = new short[Base.kNumStates << Base.kNumPosStatesBitsMax];
+
+ BitTreeDecoder[] m_PosSlotDecoder = new BitTreeDecoder[Base.kNumLenToPosStates];
+ short[] m_PosDecoders = new short[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();
+
+ int m_DictionarySize = -1;
+ int m_DictionarySizeCheck = -1;
+
+ int m_PosStateMask;
+
+ public Decoder()
+ {
+ for (int i = 0; i < Base.kNumLenToPosStates; i++)
+ m_PosSlotDecoder[i] = new BitTreeDecoder(Base.kNumPosSlotBits);
+ }
+
+ boolean SetDictionarySize(int dictionarySize)
+ {
+ if (dictionarySize < 0)
+ return false;
+ if (m_DictionarySize != dictionarySize)
+ {
+ m_DictionarySize = dictionarySize;
+ m_DictionarySizeCheck = Math.max(m_DictionarySize, 1);
+ m_OutWindow.Create(Math.max(m_DictionarySizeCheck, (1 << 12)));
+ }
+ return true;
+ }
+
+ boolean SetLcLpPb(int lc, int lp, int pb)
+ {
+ if (lc > Base.kNumLitContextBitsMax || lp > 4 || pb > Base.kNumPosStatesBitsMax)
+ return false;
+ m_LiteralDecoder.Create(lp, lc);
+ int numPosStates = 1 << pb;
+ m_LenDecoder.Create(numPosStates);
+ m_RepLenDecoder.Create(numPosStates);
+ m_PosStateMask = numPosStates - 1;
+ return true;
+ }
+
+ void Init() throws IOException
+ {
+ m_OutWindow.Init(false);
+
+ SevenZip.Compression.RangeCoder.Decoder.InitBitModels(m_IsMatchDecoders);
+ SevenZip.Compression.RangeCoder.Decoder.InitBitModels(m_IsRep0LongDecoders);
+ SevenZip.Compression.RangeCoder.Decoder.InitBitModels(m_IsRepDecoders);
+ SevenZip.Compression.RangeCoder.Decoder.InitBitModels(m_IsRepG0Decoders);
+ SevenZip.Compression.RangeCoder.Decoder.InitBitModels(m_IsRepG1Decoders);
+ SevenZip.Compression.RangeCoder.Decoder.InitBitModels(m_IsRepG2Decoders);
+ SevenZip.Compression.RangeCoder.Decoder.InitBitModels(m_PosDecoders);
+
+ m_LiteralDecoder.Init();
+ int i;
+ for (i = 0; i < Base.kNumLenToPosStates; i++)
+ m_PosSlotDecoder[i].Init();
+ m_LenDecoder.Init();
+ m_RepLenDecoder.Init();
+ m_PosAlignDecoder.Init();
+ m_RangeDecoder.Init();
+ }
+
+ public boolean Code(java.io.InputStream inStream, java.io.OutputStream outStream,
+ long outSize) throws IOException
+ {
+ m_RangeDecoder.SetStream(inStream);
+ m_OutWindow.SetStream(outStream);
+ Init();
+
+ int state = Base.StateInit();
+ int rep0 = 0, rep1 = 0, rep2 = 0, rep3 = 0;
+
+ long nowPos64 = 0;
+ byte prevByte = 0;
+ while (outSize < 0 || nowPos64 < outSize)
+ {
+ int posState = (int)nowPos64 & m_PosStateMask;
+ if (m_RangeDecoder.DecodeBit(m_IsMatchDecoders, (state << Base.kNumPosStatesBitsMax) + posState) == 0)
+ {
+ LiteralDecoder.Decoder2 decoder2 = m_LiteralDecoder.GetDecoder((int)nowPos64, prevByte);
+ if (!Base.StateIsCharState(state))
+ prevByte = decoder2.DecodeWithMatchByte(m_RangeDecoder, m_OutWindow.GetByte(rep0));
+ else
+ prevByte = decoder2.DecodeNormal(m_RangeDecoder);
+ m_OutWindow.PutByte(prevByte);
+ state = Base.StateUpdateChar(state);
+ nowPos64++;
+ }
+ else
+ {
+ int len;
+ if (m_RangeDecoder.DecodeBit(m_IsRepDecoders, state) == 1)
+ {
+ len = 0;
+ if (m_RangeDecoder.DecodeBit(m_IsRepG0Decoders, state) == 0)
+ {
+ if (m_RangeDecoder.DecodeBit(m_IsRep0LongDecoders, (state << Base.kNumPosStatesBitsMax) + posState) == 0)
+ {
+ state = Base.StateUpdateShortRep(state);
+ len = 1;
+ }
+ }
+ else
+ {
+ int distance;
+ if (m_RangeDecoder.DecodeBit(m_IsRepG1Decoders, state) == 0)
+ distance = rep1;
+ else
+ {
+ if (m_RangeDecoder.DecodeBit(m_IsRepG2Decoders, state) == 0)
+ distance = rep2;
+ else
+ {
+ distance = rep3;
+ rep3 = rep2;
+ }
+ rep2 = rep1;
+ }
+ rep1 = rep0;
+ rep0 = distance;
+ }
+ if (len == 0)
+ {
+ len = m_RepLenDecoder.Decode(m_RangeDecoder, posState) + Base.kMatchMinLen;
+ state = Base.StateUpdateRep(state);
+ }
+ }
+ else
+ {
+ rep3 = rep2;
+ rep2 = rep1;
+ rep1 = rep0;
+ len = Base.kMatchMinLen + m_LenDecoder.Decode(m_RangeDecoder, posState);
+ state = Base.StateUpdateMatch(state);
+ int posSlot = m_PosSlotDecoder[Base.GetLenToPosState(len)].Decode(m_RangeDecoder);
+ if (posSlot >= Base.kStartPosModelIndex)
+ {
+ int numDirectBits = (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);
+ if (rep0 < 0)
+ {
+ if (rep0 == -1)
+ break;
+ return false;
+ }
+ }
+ }
+ else
+ rep0 = posSlot;
+ }
+ if (rep0 >= nowPos64 || rep0 >= m_DictionarySizeCheck)
+ {
+ // m_OutWindow.Flush();
+ return false;
+ }
+ m_OutWindow.CopyBlock(rep0, len);
+ nowPos64 += len;
+ prevByte = m_OutWindow.GetByte(0);
+ }
+ }
+ m_OutWindow.Flush();
+ m_OutWindow.ReleaseStream();
+ m_RangeDecoder.ReleaseStream();
+ return true;
+ }
+
+ public boolean SetDecoderProperties(byte[] properties)
+ {
+ if (properties.length < 5)
+ return false;
+ int val = properties[0] & 0xFF;
+ int lc = val % 9;
+ int remainder = val / 9;
+ int lp = remainder % 5;
+ int pb = remainder / 5;
+ int dictionarySize = 0;
+ for (int i = 0; i < 4; i++)
+ dictionarySize += ((int)(properties[1 + i]) & 0xFF) << (i * 8);
+ if (!SetLcLpPb(lc, lp, pb))
+ return false;
+ return SetDictionarySize(dictionarySize);
+ }
+}
diff --git a/other-licenses/7zstub/src/Java/SevenZip/Compression/LZMA/Encoder.java b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZMA/Encoder.java new file mode 100644 index 0000000000..771fb21946 --- /dev/null +++ b/other-licenses/7zstub/src/Java/SevenZip/Compression/LZMA/Encoder.java @@ -0,0 +1,1416 @@ +package SevenZip.Compression.LZMA;
+
+import SevenZip.Compression.RangeCoder.BitTreeEncoder;
+import SevenZip.Compression.LZMA.Base;
+import SevenZip.Compression.LZ.BinTree;
+import SevenZip.ICodeProgress;
+import java.io.IOException;
+
+public class Encoder
+{
+ public static final int EMatchFinderTypeBT2 = 0;
+ public static final int EMatchFinderTypeBT4 = 1;
+
+
+
+
+ static final int kIfinityPrice = 0xFFFFFFF;
+
+ static byte[] g_FastPos = new byte[1 << 11];
+
+ static
+ {
+ int kFastSlots = 22;
+ int c = 2;
+ g_FastPos[0] = 0;
+ g_FastPos[1] = 1;
+ for (int slotFast = 2; slotFast < kFastSlots; slotFast++)
+ {
+ int k = (1 << ((slotFast >> 1) - 1));
+ for (int j = 0; j < k; j++, c++)
+ g_FastPos[c] = (byte)slotFast;
+ }
+ }
+
+ static int GetPosSlot(int pos)
+ {
+ if (pos < (1 << 11))
+ return g_FastPos[pos];
+ if (pos < (1 << 21))
+ return (g_FastPos[pos >> 10] + 20);
+ return (g_FastPos[pos >> 20] + 40);
+ }
+
+ static int GetPosSlot2(int pos)
+ {
+ if (pos < (1 << 17))
+ return (g_FastPos[pos >> 6] + 12);
+ if (pos < (1 << 27))
+ return (g_FastPos[pos >> 16] + 32);
+ return (g_FastPos[pos >> 26] + 52);
+ }
+
+ int _state = Base.StateInit();
+ byte _previousByte;
+ int[] _repDistances = new int[Base.kNumRepDistances];
+
+ void BaseInit()
+ {
+ _state = Base.StateInit();
+ _previousByte = 0;
+ for (int i = 0; i < Base.kNumRepDistances; i++)
+ _repDistances[i] = 0;
+ }
+
+ static final int kDefaultDictionaryLogSize = 22;
+ static final int kNumFastBytesDefault = 0x20;
+
+ class LiteralEncoder
+ {
+ class Encoder2
+ {
+ short[] m_Encoders = new short[0x300];
+
+ public void Init() { SevenZip.Compression.RangeCoder.Encoder.InitBitModels(m_Encoders); }
+
+
+
+ public void Encode(SevenZip.Compression.RangeCoder.Encoder rangeEncoder, byte symbol) throws IOException
+ {
+ int context = 1;
+ for (int i = 7; i >= 0; i--)
+ {
+ int bit = ((symbol >> i) & 1);
+ rangeEncoder.Encode(m_Encoders, context, bit);
+ context = (context << 1) | bit;
+ }
+ }
+
+ public void EncodeMatched(SevenZip.Compression.RangeCoder.Encoder rangeEncoder, byte matchByte, byte symbol) throws IOException
+ {
+ int context = 1;
+ boolean same = true;
+ for (int i = 7; i >= 0; i--)
+ {
+ int bit = ((symbol >> i) & 1);
+ int state = context;
+ if (same)
+ {
+ int matchBit = ((matchByte >> i) & 1);
+ state += ((1 + matchBit) << 8);
+ same = (matchBit == bit);
+ }
+ rangeEncoder.Encode(m_Encoders, state, bit);
+ context = (context << 1) | bit;
+ }
+ }
+
+ public int GetPrice(boolean matchMode, byte matchByte, byte symbol)
+ {
+ int price = 0;
+ int context = 1;
+ int i = 7;
+ if (matchMode)
+ {
+ for (; i >= 0; i--)
+ {
+ int matchBit = (matchByte >> i) & 1;
+ int bit = (symbol >> i) & 1;
+ price += SevenZip.Compression.RangeCoder.Encoder.GetPrice(m_Encoders[((1 + matchBit) << 8) + context], bit);
+ context = (context << 1) | bit;
+ if (matchBit != bit)
+ {
+ i--;
+ break;
+ }
+ }
+ }
+ for (; i >= 0; i--)
+ {
+ int bit = (symbol >> i) & 1;
+ price += SevenZip.Compression.RangeCoder.Encoder.GetPrice(m_Encoders[context], bit);
+ context = (context << 1) | bit;
+ }
+ return price;
+ }
+ }
+
+ Encoder2[] m_Coders;
+ int m_NumPrevBits;
+ int m_NumPosBits;
+ int 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 = (1 << numPosBits) - 1;
+ m_NumPrevBits = numPrevBits;
+ int numStates = 1 << (m_NumPrevBits + m_NumPosBits);
+ m_Coders = new Encoder2[numStates];
+ for (int i = 0; i < numStates; i++)
+ m_Coders[i] = new Encoder2();
+ }
+
+ public void Init()
+ {
+ int numStates = 1 << (m_NumPrevBits + m_NumPosBits);
+ for (int i = 0; i < numStates; i++)
+ m_Coders[i].Init();
+ }
+
+ public Encoder2 GetSubCoder(int pos, byte prevByte)
+ { return m_Coders[((pos & m_PosMask) << m_NumPrevBits) + ((prevByte & 0xFF) >>> (8 - m_NumPrevBits))]; }
+ }
+
+ class LenEncoder
+ {
+ short[] _choice = new short[2];
+ BitTreeEncoder[] _lowCoder = new BitTreeEncoder[Base.kNumPosStatesEncodingMax];
+ BitTreeEncoder[] _midCoder = new BitTreeEncoder[Base.kNumPosStatesEncodingMax];
+ BitTreeEncoder _highCoder = new BitTreeEncoder(Base.kNumHighLenBits);
+
+
+ public LenEncoder()
+ {
+ for (int posState = 0; posState < Base.kNumPosStatesEncodingMax; posState++)
+ {
+ _lowCoder[posState] = new BitTreeEncoder(Base.kNumLowLenBits);
+ _midCoder[posState] = new BitTreeEncoder(Base.kNumMidLenBits);
+ }
+ }
+
+ public void Init(int numPosStates)
+ {
+ SevenZip.Compression.RangeCoder.Encoder.InitBitModels(_choice);
+
+ for (int posState = 0; posState < numPosStates; posState++)
+ {
+ _lowCoder[posState].Init();
+ _midCoder[posState].Init();
+ }
+ _highCoder.Init();
+ }
+
+ public void Encode(SevenZip.Compression.RangeCoder.Encoder rangeEncoder, int symbol, int posState) throws IOException
+ {
+ if (symbol < Base.kNumLowLenSymbols)
+ {
+ rangeEncoder.Encode(_choice, 0, 0);
+ _lowCoder[posState].Encode(rangeEncoder, symbol);
+ }
+ else
+ {
+ symbol -= Base.kNumLowLenSymbols;
+ rangeEncoder.Encode(_choice, 0, 1);
+ if (symbol < Base.kNumMidLenSymbols)
+ {
+ rangeEncoder.Encode(_choice, 1, 0);
+ _midCoder[posState].Encode(rangeEncoder, symbol);
+ }
+ else
+ {
+ rangeEncoder.Encode(_choice, 1, 1);
+ _highCoder.Encode(rangeEncoder, symbol - Base.kNumMidLenSymbols);
+ }
+ }
+ }
+
+ public void SetPrices(int posState, int numSymbols, int[] prices, int st)
+ {
+ int a0 = SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_choice[0]);
+ int a1 = SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_choice[0]);
+ int b0 = a1 + SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_choice[1]);
+ int b1 = a1 + SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_choice[1]);
+ int i = 0;
+ for (i = 0; i < Base.kNumLowLenSymbols; i++)
+ {
+ if (i >= numSymbols)
+ return;
+ prices[st + i] = a0 + _lowCoder[posState].GetPrice(i);
+ }
+ for (; i < Base.kNumLowLenSymbols + Base.kNumMidLenSymbols; i++)
+ {
+ if (i >= numSymbols)
+ return;
+ prices[st + i] = b0 + _midCoder[posState].GetPrice(i - Base.kNumLowLenSymbols);
+ }
+ for (; i < numSymbols; i++)
+ prices[st + i] = b1 + _highCoder.GetPrice(i - Base.kNumLowLenSymbols - Base.kNumMidLenSymbols);
+ }
+ };
+
+ public static final int kNumLenSpecSymbols = Base.kNumLowLenSymbols + Base.kNumMidLenSymbols;
+
+ class LenPriceTableEncoder extends LenEncoder
+ {
+ int[] _prices = new int[Base.kNumLenSymbols<<Base.kNumPosStatesBitsEncodingMax];
+ int _tableSize;
+ int[] _counters = new int[Base.kNumPosStatesEncodingMax];
+
+ public void SetTableSize(int tableSize) { _tableSize = tableSize; }
+
+ public int GetPrice(int symbol, int posState)
+ {
+ return _prices[posState * Base.kNumLenSymbols + symbol];
+ }
+
+ void UpdateTable(int posState)
+ {
+ SetPrices(posState, _tableSize, _prices, posState * Base.kNumLenSymbols);
+ _counters[posState] = _tableSize;
+ }
+
+ public void UpdateTables(int numPosStates)
+ {
+ for (int posState = 0; posState < numPosStates; posState++)
+ UpdateTable(posState);
+ }
+
+ public void Encode(SevenZip.Compression.RangeCoder.Encoder rangeEncoder, int symbol, int posState) throws IOException
+ {
+ super.Encode(rangeEncoder, symbol, posState);
+ if (--_counters[posState] == 0)
+ UpdateTable(posState);
+ }
+ }
+
+ static final int kNumOpts = 1 << 12;
+ class Optimal
+ {
+ public int State;
+
+ public boolean Prev1IsChar;
+ public boolean Prev2;
+
+ public int PosPrev2;
+ public int BackPrev2;
+
+ public int Price;
+ public int PosPrev;
+ public int BackPrev;
+
+ public int Backs0;
+ public int Backs1;
+ public int Backs2;
+ public int Backs3;
+
+ public void MakeAsChar() { BackPrev = -1; Prev1IsChar = false; }
+ public void MakeAsShortRep() { BackPrev = 0; ; Prev1IsChar = false; }
+ public boolean IsShortRep() { return (BackPrev == 0); }
+ };
+ Optimal[] _optimum = new Optimal[kNumOpts];
+ SevenZip.Compression.LZ.BinTree _matchFinder = null;
+ SevenZip.Compression.RangeCoder.Encoder _rangeEncoder = new SevenZip.Compression.RangeCoder.Encoder();
+
+ short[] _isMatch = new short[Base.kNumStates<<Base.kNumPosStatesBitsMax];
+ short[] _isRep = new short[Base.kNumStates];
+ short[] _isRepG0 = new short[Base.kNumStates];
+ short[] _isRepG1 = new short[Base.kNumStates];
+ short[] _isRepG2 = new short[Base.kNumStates];
+ short[] _isRep0Long = new short[Base.kNumStates<<Base.kNumPosStatesBitsMax];
+
+ BitTreeEncoder[] _posSlotEncoder = new BitTreeEncoder[Base.kNumLenToPosStates]; // kNumPosSlotBits
+
+ short[] _posEncoders = new short[Base.kNumFullDistances-Base.kEndPosModelIndex];
+ BitTreeEncoder _posAlignEncoder = new BitTreeEncoder(Base.kNumAlignBits);
+
+ LenPriceTableEncoder _lenEncoder = new LenPriceTableEncoder();
+ LenPriceTableEncoder _repMatchLenEncoder = new LenPriceTableEncoder();
+
+ LiteralEncoder _literalEncoder = new LiteralEncoder();
+
+ int[] _matchDistances = new int[Base.kMatchMaxLen*2+2];
+
+ int _numFastBytes = kNumFastBytesDefault;
+ int _longestMatchLength;
+ int _numDistancePairs;
+
+ int _additionalOffset;
+
+ int _optimumEndIndex;
+ int _optimumCurrentIndex;
+
+ boolean _longestMatchWasFound;
+
+ int[] _posSlotPrices = new int[1<<(Base.kNumPosSlotBits+Base.kNumLenToPosStatesBits)];
+ int[] _distancesPrices = new int[Base.kNumFullDistances<<Base.kNumLenToPosStatesBits];
+ int[] _alignPrices = new int[Base.kAlignTableSize];
+ int _alignPriceCount;
+
+ int _distTableSize = (kDefaultDictionaryLogSize * 2);
+
+ int _posStateBits = 2;
+ int _posStateMask = (4 - 1);
+ int _numLiteralPosStateBits = 0;
+ int _numLiteralContextBits = 3;
+
+ int _dictionarySize = (1 << kDefaultDictionaryLogSize);
+ int _dictionarySizePrev = -1;
+ int _numFastBytesPrev = -1;
+
+ long nowPos64;
+ boolean _finished;
+ java.io.InputStream _inStream;
+
+ int _matchFinderType = EMatchFinderTypeBT4;
+ boolean _writeEndMark = false;
+
+ boolean _needReleaseMFStream = false;
+
+ void Create()
+ {
+ if (_matchFinder == null)
+ {
+ SevenZip.Compression.LZ.BinTree bt = new SevenZip.Compression.LZ.BinTree();
+ int numHashBytes = 4;
+ if (_matchFinderType == EMatchFinderTypeBT2)
+ numHashBytes = 2;
+ bt.SetType(numHashBytes);
+ _matchFinder = bt;
+ }
+ _literalEncoder.Create(_numLiteralPosStateBits, _numLiteralContextBits);
+
+ if (_dictionarySize == _dictionarySizePrev && _numFastBytesPrev == _numFastBytes)
+ return;
+ _matchFinder.Create(_dictionarySize, kNumOpts, _numFastBytes, Base.kMatchMaxLen + 1);
+ _dictionarySizePrev = _dictionarySize;
+ _numFastBytesPrev = _numFastBytes;
+ }
+
+ public Encoder()
+ {
+ for (int i = 0; i < kNumOpts; i++)
+ _optimum[i] = new Optimal();
+ for (int i = 0; i < Base.kNumLenToPosStates; i++)
+ _posSlotEncoder[i] = new BitTreeEncoder(Base.kNumPosSlotBits);
+ }
+
+ void SetWriteEndMarkerMode(boolean writeEndMarker)
+ {
+ _writeEndMark = writeEndMarker;
+ }
+
+ void Init()
+ {
+ BaseInit();
+ _rangeEncoder.Init();
+
+ SevenZip.Compression.RangeCoder.Encoder.InitBitModels(_isMatch);
+ SevenZip.Compression.RangeCoder.Encoder.InitBitModels(_isRep0Long);
+ SevenZip.Compression.RangeCoder.Encoder.InitBitModels(_isRep);
+ SevenZip.Compression.RangeCoder.Encoder.InitBitModels(_isRepG0);
+ SevenZip.Compression.RangeCoder.Encoder.InitBitModels(_isRepG1);
+ SevenZip.Compression.RangeCoder.Encoder.InitBitModels(_isRepG2);
+ SevenZip.Compression.RangeCoder.Encoder.InitBitModels(_posEncoders);
+
+
+
+
+
+
+
+ _literalEncoder.Init();
+ for (int i = 0; i < Base.kNumLenToPosStates; i++)
+ _posSlotEncoder[i].Init();
+
+
+
+ _lenEncoder.Init(1 << _posStateBits);
+ _repMatchLenEncoder.Init(1 << _posStateBits);
+
+ _posAlignEncoder.Init();
+
+ _longestMatchWasFound = false;
+ _optimumEndIndex = 0;
+ _optimumCurrentIndex = 0;
+ _additionalOffset = 0;
+ }
+
+ int ReadMatchDistances() throws java.io.IOException
+ {
+ int lenRes = 0;
+ _numDistancePairs = _matchFinder.GetMatches(_matchDistances);
+ if (_numDistancePairs > 0)
+ {
+ lenRes = _matchDistances[_numDistancePairs - 2];
+ if (lenRes == _numFastBytes)
+ lenRes += _matchFinder.GetMatchLen((int)lenRes - 1, _matchDistances[_numDistancePairs - 1],
+ Base.kMatchMaxLen - lenRes);
+ }
+ _additionalOffset++;
+ return lenRes;
+ }
+
+ void MovePos(int num) throws java.io.IOException
+ {
+ if (num > 0)
+ {
+ _matchFinder.Skip(num);
+ _additionalOffset += num;
+ }
+ }
+
+ int GetRepLen1Price(int state, int posState)
+ {
+ return SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_isRepG0[state]) +
+ SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_isRep0Long[(state << Base.kNumPosStatesBitsMax) + posState]);
+ }
+
+ int GetPureRepPrice(int repIndex, int state, int posState)
+ {
+ int price;
+ if (repIndex == 0)
+ {
+ price = SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_isRepG0[state]);
+ price += SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isRep0Long[(state << Base.kNumPosStatesBitsMax) + posState]);
+ }
+ else
+ {
+ price = SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isRepG0[state]);
+ if (repIndex == 1)
+ price += SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_isRepG1[state]);
+ else
+ {
+ price += SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isRepG1[state]);
+ price += SevenZip.Compression.RangeCoder.Encoder.GetPrice(_isRepG2[state], repIndex - 2);
+ }
+ }
+ return price;
+ }
+
+ int GetRepPrice(int repIndex, int len, int state, int posState)
+ {
+ int price = _repMatchLenEncoder.GetPrice(len - Base.kMatchMinLen, posState);
+ return price + GetPureRepPrice(repIndex, state, posState);
+ }
+
+ int GetPosLenPrice(int pos, int len, int posState)
+ {
+ int price;
+ int lenToPosState = Base.GetLenToPosState(len);
+ if (pos < Base.kNumFullDistances)
+ price = _distancesPrices[(lenToPosState * Base.kNumFullDistances) + pos];
+ else
+ price = _posSlotPrices[(lenToPosState << Base.kNumPosSlotBits) + GetPosSlot2(pos)] +
+ _alignPrices[pos & Base.kAlignMask];
+ return price + _lenEncoder.GetPrice(len - Base.kMatchMinLen, posState);
+ }
+
+ int Backward(int cur)
+ {
+ _optimumEndIndex = cur;
+ int posMem = _optimum[cur].PosPrev;
+ int backMem = _optimum[cur].BackPrev;
+ do
+ {
+ if (_optimum[cur].Prev1IsChar)
+ {
+ _optimum[posMem].MakeAsChar();
+ _optimum[posMem].PosPrev = posMem - 1;
+ if (_optimum[cur].Prev2)
+ {
+ _optimum[posMem - 1].Prev1IsChar = false;
+ _optimum[posMem - 1].PosPrev = _optimum[cur].PosPrev2;
+ _optimum[posMem - 1].BackPrev = _optimum[cur].BackPrev2;
+ }
+ }
+ int posPrev = posMem;
+ int backCur = backMem;
+
+ backMem = _optimum[posPrev].BackPrev;
+ posMem = _optimum[posPrev].PosPrev;
+
+ _optimum[posPrev].BackPrev = backCur;
+ _optimum[posPrev].PosPrev = cur;
+ cur = posPrev;
+ }
+ while (cur > 0);
+ backRes = _optimum[0].BackPrev;
+ _optimumCurrentIndex = _optimum[0].PosPrev;
+ return _optimumCurrentIndex;
+ }
+
+ int[] reps = new int[Base.kNumRepDistances];
+ int[] repLens = new int[Base.kNumRepDistances];
+ int backRes;
+
+ int GetOptimum(int position) throws IOException
+ {
+ if (_optimumEndIndex != _optimumCurrentIndex)
+ {
+ int lenRes = _optimum[_optimumCurrentIndex].PosPrev - _optimumCurrentIndex;
+ backRes = _optimum[_optimumCurrentIndex].BackPrev;
+ _optimumCurrentIndex = _optimum[_optimumCurrentIndex].PosPrev;
+ return lenRes;
+ }
+ _optimumCurrentIndex = _optimumEndIndex = 0;
+
+ int lenMain, numDistancePairs;
+ if (!_longestMatchWasFound)
+ {
+ lenMain = ReadMatchDistances();
+ }
+ else
+ {
+ lenMain = _longestMatchLength;
+ _longestMatchWasFound = false;
+ }
+ numDistancePairs = _numDistancePairs;
+
+ int numAvailableBytes = _matchFinder.GetNumAvailableBytes() + 1;
+ if (numAvailableBytes < 2)
+ {
+ backRes = -1;
+ return 1;
+ }
+ if (numAvailableBytes > Base.kMatchMaxLen)
+ numAvailableBytes = Base.kMatchMaxLen;
+
+ int repMaxIndex = 0;
+ int i;
+ for (i = 0; i < Base.kNumRepDistances; i++)
+ {
+ reps[i] = _repDistances[i];
+ repLens[i] = _matchFinder.GetMatchLen(0 - 1, reps[i], Base.kMatchMaxLen);
+ if (repLens[i] > repLens[repMaxIndex])
+ repMaxIndex = i;
+ }
+ if (repLens[repMaxIndex] >= _numFastBytes)
+ {
+ backRes = repMaxIndex;
+ int lenRes = repLens[repMaxIndex];
+ MovePos(lenRes - 1);
+ return lenRes;
+ }
+
+ if (lenMain >= _numFastBytes)
+ {
+ backRes = _matchDistances[numDistancePairs - 1] + Base.kNumRepDistances;
+ MovePos(lenMain - 1);
+ return lenMain;
+ }
+
+ byte currentByte = _matchFinder.GetIndexByte(0 - 1);
+ byte matchByte = _matchFinder.GetIndexByte(0 - _repDistances[0] - 1 - 1);
+
+ if (lenMain < 2 && currentByte != matchByte && repLens[repMaxIndex] < 2)
+ {
+ backRes = -1;
+ return 1;
+ }
+
+ _optimum[0].State = _state;
+
+ int posState = (position & _posStateMask);
+
+ _optimum[1].Price = SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_isMatch[(_state << Base.kNumPosStatesBitsMax) + posState]) +
+ _literalEncoder.GetSubCoder(position, _previousByte).GetPrice(!Base.StateIsCharState(_state), matchByte, currentByte);
+ _optimum[1].MakeAsChar();
+
+ int matchPrice = SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isMatch[(_state << Base.kNumPosStatesBitsMax) + posState]);
+ int repMatchPrice = matchPrice + SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isRep[_state]);
+
+ if (matchByte == currentByte)
+ {
+ int shortRepPrice = repMatchPrice + GetRepLen1Price(_state, posState);
+ if (shortRepPrice < _optimum[1].Price)
+ {
+ _optimum[1].Price = shortRepPrice;
+ _optimum[1].MakeAsShortRep();
+ }
+ }
+
+ int lenEnd = ((lenMain >= repLens[repMaxIndex]) ? lenMain : repLens[repMaxIndex]);
+
+ if (lenEnd < 2)
+ {
+ backRes = _optimum[1].BackPrev;
+ return 1;
+ }
+
+ _optimum[1].PosPrev = 0;
+
+ _optimum[0].Backs0 = reps[0];
+ _optimum[0].Backs1 = reps[1];
+ _optimum[0].Backs2 = reps[2];
+ _optimum[0].Backs3 = reps[3];
+
+ int len = lenEnd;
+ do
+ _optimum[len--].Price = kIfinityPrice;
+ while (len >= 2);
+
+ for (i = 0; i < Base.kNumRepDistances; i++)
+ {
+ int repLen = repLens[i];
+ if (repLen < 2)
+ continue;
+ int price = repMatchPrice + GetPureRepPrice(i, _state, posState);
+ do
+ {
+ int curAndLenPrice = price + _repMatchLenEncoder.GetPrice(repLen - 2, posState);
+ Optimal optimum = _optimum[repLen];
+ if (curAndLenPrice < optimum.Price)
+ {
+ optimum.Price = curAndLenPrice;
+ optimum.PosPrev = 0;
+ optimum.BackPrev = i;
+ optimum.Prev1IsChar = false;
+ }
+ }
+ while (--repLen >= 2);
+ }
+
+ int normalMatchPrice = matchPrice + SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_isRep[_state]);
+
+ len = ((repLens[0] >= 2) ? repLens[0] + 1 : 2);
+ if (len <= lenMain)
+ {
+ int offs = 0;
+ while (len > _matchDistances[offs])
+ offs += 2;
+ for (; ; len++)
+ {
+ int distance = _matchDistances[offs + 1];
+ int curAndLenPrice = normalMatchPrice + GetPosLenPrice(distance, len, posState);
+ Optimal optimum = _optimum[len];
+ if (curAndLenPrice < optimum.Price)
+ {
+ optimum.Price = curAndLenPrice;
+ optimum.PosPrev = 0;
+ optimum.BackPrev = distance + Base.kNumRepDistances;
+ optimum.Prev1IsChar = false;
+ }
+ if (len == _matchDistances[offs])
+ {
+ offs += 2;
+ if (offs == numDistancePairs)
+ break;
+ }
+ }
+ }
+
+ int cur = 0;
+
+ while (true)
+ {
+ cur++;
+ if (cur == lenEnd)
+ return Backward(cur);
+ int newLen = ReadMatchDistances();
+ numDistancePairs = _numDistancePairs;
+ if (newLen >= _numFastBytes)
+ {
+
+ _longestMatchLength = newLen;
+ _longestMatchWasFound = true;
+ return Backward(cur);
+ }
+ position++;
+ int posPrev = _optimum[cur].PosPrev;
+ int state;
+ if (_optimum[cur].Prev1IsChar)
+ {
+ posPrev--;
+ if (_optimum[cur].Prev2)
+ {
+ state = _optimum[_optimum[cur].PosPrev2].State;
+ if (_optimum[cur].BackPrev2 < Base.kNumRepDistances)
+ state = Base.StateUpdateRep(state);
+ else
+ state = Base.StateUpdateMatch(state);
+ }
+ else
+ state = _optimum[posPrev].State;
+ state = Base.StateUpdateChar(state);
+ }
+ else
+ state = _optimum[posPrev].State;
+ if (posPrev == cur - 1)
+ {
+ if (_optimum[cur].IsShortRep())
+ state = Base.StateUpdateShortRep(state);
+ else
+ state = Base.StateUpdateChar(state);
+ }
+ else
+ {
+ int pos;
+ if (_optimum[cur].Prev1IsChar && _optimum[cur].Prev2)
+ {
+ posPrev = _optimum[cur].PosPrev2;
+ pos = _optimum[cur].BackPrev2;
+ state = Base.StateUpdateRep(state);
+ }
+ else
+ {
+ pos = _optimum[cur].BackPrev;
+ if (pos < Base.kNumRepDistances)
+ state = Base.StateUpdateRep(state);
+ else
+ state = Base.StateUpdateMatch(state);
+ }
+ Optimal opt = _optimum[posPrev];
+ if (pos < Base.kNumRepDistances)
+ {
+ if (pos == 0)
+ {
+ reps[0] = opt.Backs0;
+ reps[1] = opt.Backs1;
+ reps[2] = opt.Backs2;
+ reps[3] = opt.Backs3;
+ }
+ else if (pos == 1)
+ {
+ reps[0] = opt.Backs1;
+ reps[1] = opt.Backs0;
+ reps[2] = opt.Backs2;
+ reps[3] = opt.Backs3;
+ }
+ else if (pos == 2)
+ {
+ reps[0] = opt.Backs2;
+ reps[1] = opt.Backs0;
+ reps[2] = opt.Backs1;
+ reps[3] = opt.Backs3;
+ }
+ else
+ {
+ reps[0] = opt.Backs3;
+ reps[1] = opt.Backs0;
+ reps[2] = opt.Backs1;
+ reps[3] = opt.Backs2;
+ }
+ }
+ else
+ {
+ reps[0] = (pos - Base.kNumRepDistances);
+ reps[1] = opt.Backs0;
+ reps[2] = opt.Backs1;
+ reps[3] = opt.Backs2;
+ }
+ }
+ _optimum[cur].State = state;
+ _optimum[cur].Backs0 = reps[0];
+ _optimum[cur].Backs1 = reps[1];
+ _optimum[cur].Backs2 = reps[2];
+ _optimum[cur].Backs3 = reps[3];
+ int curPrice = _optimum[cur].Price;
+
+ currentByte = _matchFinder.GetIndexByte(0 - 1);
+ matchByte = _matchFinder.GetIndexByte(0 - reps[0] - 1 - 1);
+
+ posState = (position & _posStateMask);
+
+ int curAnd1Price = curPrice +
+ SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_isMatch[(state << Base.kNumPosStatesBitsMax) + posState]) +
+ _literalEncoder.GetSubCoder(position, _matchFinder.GetIndexByte(0 - 2)).
+ GetPrice(!Base.StateIsCharState(state), matchByte, currentByte);
+
+ Optimal nextOptimum = _optimum[cur + 1];
+
+ boolean nextIsChar = false;
+ if (curAnd1Price < nextOptimum.Price)
+ {
+ nextOptimum.Price = curAnd1Price;
+ nextOptimum.PosPrev = cur;
+ nextOptimum.MakeAsChar();
+ nextIsChar = true;
+ }
+
+ matchPrice = curPrice + SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isMatch[(state << Base.kNumPosStatesBitsMax) + posState]);
+ repMatchPrice = matchPrice + SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isRep[state]);
+
+ if (matchByte == currentByte &&
+ !(nextOptimum.PosPrev < cur && nextOptimum.BackPrev == 0))
+ {
+ int shortRepPrice = repMatchPrice + GetRepLen1Price(state, posState);
+ if (shortRepPrice <= nextOptimum.Price)
+ {
+ nextOptimum.Price = shortRepPrice;
+ nextOptimum.PosPrev = cur;
+ nextOptimum.MakeAsShortRep();
+ nextIsChar = true;
+ }
+ }
+
+ int numAvailableBytesFull = _matchFinder.GetNumAvailableBytes() + 1;
+ numAvailableBytesFull = Math.min(kNumOpts - 1 - cur, numAvailableBytesFull);
+ numAvailableBytes = numAvailableBytesFull;
+
+ if (numAvailableBytes < 2)
+ continue;
+ if (numAvailableBytes > _numFastBytes)
+ numAvailableBytes = _numFastBytes;
+ if (!nextIsChar && matchByte != currentByte)
+ {
+ // try Literal + rep0
+ int t = Math.min(numAvailableBytesFull - 1, _numFastBytes);
+ int lenTest2 = _matchFinder.GetMatchLen(0, reps[0], t);
+ if (lenTest2 >= 2)
+ {
+ int state2 = Base.StateUpdateChar(state);
+
+ int posStateNext = (position + 1) & _posStateMask;
+ int nextRepMatchPrice = curAnd1Price +
+ SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isMatch[(state2 << Base.kNumPosStatesBitsMax) + posStateNext]) +
+ SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isRep[state2]);
+ {
+ int offset = cur + 1 + lenTest2;
+ while (lenEnd < offset)
+ _optimum[++lenEnd].Price = kIfinityPrice;
+ int curAndLenPrice = nextRepMatchPrice + GetRepPrice(
+ 0, lenTest2, state2, posStateNext);
+ Optimal optimum = _optimum[offset];
+ if (curAndLenPrice < optimum.Price)
+ {
+ optimum.Price = curAndLenPrice;
+ optimum.PosPrev = cur + 1;
+ optimum.BackPrev = 0;
+ optimum.Prev1IsChar = true;
+ optimum.Prev2 = false;
+ }
+ }
+ }
+ }
+
+ int startLen = 2; // speed optimization
+
+ for (int repIndex = 0; repIndex < Base.kNumRepDistances; repIndex++)
+ {
+ int lenTest = _matchFinder.GetMatchLen(0 - 1, reps[repIndex], numAvailableBytes);
+ if (lenTest < 2)
+ continue;
+ int lenTestTemp = lenTest;
+ do
+ {
+ while (lenEnd < cur + lenTest)
+ _optimum[++lenEnd].Price = kIfinityPrice;
+ int curAndLenPrice = repMatchPrice + GetRepPrice(repIndex, lenTest, state, posState);
+ Optimal optimum = _optimum[cur + lenTest];
+ if (curAndLenPrice < optimum.Price)
+ {
+ optimum.Price = curAndLenPrice;
+ optimum.PosPrev = cur;
+ optimum.BackPrev = repIndex;
+ optimum.Prev1IsChar = false;
+ }
+ }
+ while (--lenTest >= 2);
+ lenTest = lenTestTemp;
+
+ if (repIndex == 0)
+ startLen = lenTest + 1;
+
+ // if (_maxMode)
+ if (lenTest < numAvailableBytesFull)
+ {
+ int t = Math.min(numAvailableBytesFull - 1 - lenTest, _numFastBytes);
+ int lenTest2 = _matchFinder.GetMatchLen(lenTest, reps[repIndex], t);
+ if (lenTest2 >= 2)
+ {
+ int state2 = Base.StateUpdateRep(state);
+
+ int posStateNext = (position + lenTest) & _posStateMask;
+ int curAndLenCharPrice =
+ repMatchPrice + GetRepPrice(repIndex, lenTest, state, posState) +
+ SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_isMatch[(state2 << Base.kNumPosStatesBitsMax) + posStateNext]) +
+ _literalEncoder.GetSubCoder(position + lenTest,
+ _matchFinder.GetIndexByte(lenTest - 1 - 1)).GetPrice(true,
+ _matchFinder.GetIndexByte(lenTest - 1 - (reps[repIndex] + 1)),
+ _matchFinder.GetIndexByte(lenTest - 1));
+ state2 = Base.StateUpdateChar(state2);
+ posStateNext = (position + lenTest + 1) & _posStateMask;
+ int nextMatchPrice = curAndLenCharPrice + SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isMatch[(state2 << Base.kNumPosStatesBitsMax) + posStateNext]);
+ int nextRepMatchPrice = nextMatchPrice + SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isRep[state2]);
+
+ // for(; lenTest2 >= 2; lenTest2--)
+ {
+ int offset = lenTest + 1 + lenTest2;
+ while (lenEnd < cur + offset)
+ _optimum[++lenEnd].Price = kIfinityPrice;
+ int curAndLenPrice = nextRepMatchPrice + GetRepPrice(0, lenTest2, state2, posStateNext);
+ Optimal optimum = _optimum[cur + offset];
+ if (curAndLenPrice < optimum.Price)
+ {
+ optimum.Price = curAndLenPrice;
+ optimum.PosPrev = cur + lenTest + 1;
+ optimum.BackPrev = 0;
+ optimum.Prev1IsChar = true;
+ optimum.Prev2 = true;
+ optimum.PosPrev2 = cur;
+ optimum.BackPrev2 = repIndex;
+ }
+ }
+ }
+ }
+ }
+
+ if (newLen > numAvailableBytes)
+ {
+ newLen = numAvailableBytes;
+ for (numDistancePairs = 0; newLen > _matchDistances[numDistancePairs]; numDistancePairs += 2) ;
+ _matchDistances[numDistancePairs] = newLen;
+ numDistancePairs += 2;
+ }
+ if (newLen >= startLen)
+ {
+ normalMatchPrice = matchPrice + SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_isRep[state]);
+ while (lenEnd < cur + newLen)
+ _optimum[++lenEnd].Price = kIfinityPrice;
+
+ int offs = 0;
+ while (startLen > _matchDistances[offs])
+ offs += 2;
+
+ for (int lenTest = startLen; ; lenTest++)
+ {
+ int curBack = _matchDistances[offs + 1];
+ int curAndLenPrice = normalMatchPrice + GetPosLenPrice(curBack, lenTest, posState);
+ Optimal optimum = _optimum[cur + lenTest];
+ if (curAndLenPrice < optimum.Price)
+ {
+ optimum.Price = curAndLenPrice;
+ optimum.PosPrev = cur;
+ optimum.BackPrev = curBack + Base.kNumRepDistances;
+ optimum.Prev1IsChar = false;
+ }
+
+ if (lenTest == _matchDistances[offs])
+ {
+ if (lenTest < numAvailableBytesFull)
+ {
+ int t = Math.min(numAvailableBytesFull - 1 - lenTest, _numFastBytes);
+ int lenTest2 = _matchFinder.GetMatchLen(lenTest, curBack, t);
+ if (lenTest2 >= 2)
+ {
+ int state2 = Base.StateUpdateMatch(state);
+
+ int posStateNext = (position + lenTest) & _posStateMask;
+ int curAndLenCharPrice = curAndLenPrice +
+ SevenZip.Compression.RangeCoder.Encoder.GetPrice0(_isMatch[(state2 << Base.kNumPosStatesBitsMax) + posStateNext]) +
+ _literalEncoder.GetSubCoder(position + lenTest,
+ _matchFinder.GetIndexByte(lenTest - 1 - 1)).
+ GetPrice(true,
+ _matchFinder.GetIndexByte(lenTest - (curBack + 1) - 1),
+ _matchFinder.GetIndexByte(lenTest - 1));
+ state2 = Base.StateUpdateChar(state2);
+ posStateNext = (position + lenTest + 1) & _posStateMask;
+ int nextMatchPrice = curAndLenCharPrice + SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isMatch[(state2 << Base.kNumPosStatesBitsMax) + posStateNext]);
+ int nextRepMatchPrice = nextMatchPrice + SevenZip.Compression.RangeCoder.Encoder.GetPrice1(_isRep[state2]);
+
+ int offset = lenTest + 1 + lenTest2;
+ while (lenEnd < cur + offset)
+ _optimum[++lenEnd].Price = kIfinityPrice;
+ curAndLenPrice = nextRepMatchPrice + GetRepPrice(0, lenTest2, state2, posStateNext);
+ optimum = _optimum[cur + offset];
+ if (curAndLenPrice < optimum.Price)
+ {
+ optimum.Price = curAndLenPrice;
+ optimum.PosPrev = cur + lenTest + 1;
+ optimum.BackPrev = 0;
+ optimum.Prev1IsChar = true;
+ optimum.Prev2 = true;
+ optimum.PosPrev2 = cur;
+ optimum.BackPrev2 = curBack + Base.kNumRepDistances;
+ }
+ }
+ }
+ offs += 2;
+ if (offs == numDistancePairs)
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ boolean ChangePair(int smallDist, int bigDist)
+ {
+ int kDif = 7;
+ return (smallDist < (1 << (32 - kDif)) && bigDist >= (smallDist << kDif));
+ }
+
+ void WriteEndMarker(int posState) throws IOException
+ {
+ if (!_writeEndMark)
+ return;
+
+ _rangeEncoder.Encode(_isMatch, (_state << Base.kNumPosStatesBitsMax) + posState, 1);
+ _rangeEncoder.Encode(_isRep, _state, 0);
+ _state = Base.StateUpdateMatch(_state);
+ int len = Base.kMatchMinLen;
+ _lenEncoder.Encode(_rangeEncoder, len - Base.kMatchMinLen, posState);
+ int posSlot = (1 << Base.kNumPosSlotBits) - 1;
+ int lenToPosState = Base.GetLenToPosState(len);
+ _posSlotEncoder[lenToPosState].Encode(_rangeEncoder, posSlot);
+ int footerBits = 30;
+ int posReduced = (1 << footerBits) - 1;
+ _rangeEncoder.EncodeDirectBits(posReduced >> Base.kNumAlignBits, footerBits - Base.kNumAlignBits);
+ _posAlignEncoder.ReverseEncode(_rangeEncoder, posReduced & Base.kAlignMask);
+ }
+
+ void Flush(int nowPos) throws IOException
+ {
+ ReleaseMFStream();
+ WriteEndMarker(nowPos & _posStateMask);
+ _rangeEncoder.FlushData();
+ _rangeEncoder.FlushStream();
+ }
+
+ public void CodeOneBlock(long[] inSize, long[] outSize, boolean[] finished) throws IOException
+ {
+ inSize[0] = 0;
+ outSize[0] = 0;
+ finished[0] = true;
+
+ if (_inStream != null)
+ {
+ _matchFinder.SetStream(_inStream);
+ _matchFinder.Init();
+ _needReleaseMFStream = true;
+ _inStream = null;
+ }
+
+ if (_finished)
+ return;
+ _finished = true;
+
+
+ long progressPosValuePrev = nowPos64;
+ if (nowPos64 == 0)
+ {
+ if (_matchFinder.GetNumAvailableBytes() == 0)
+ {
+ Flush((int)nowPos64);
+ return;
+ }
+
+ ReadMatchDistances();
+ int posState = (int)(nowPos64) & _posStateMask;
+ _rangeEncoder.Encode(_isMatch, (_state << Base.kNumPosStatesBitsMax) + posState, 0);
+ _state = Base.StateUpdateChar(_state);
+ byte curByte = _matchFinder.GetIndexByte(0 - _additionalOffset);
+ _literalEncoder.GetSubCoder((int)(nowPos64), _previousByte).Encode(_rangeEncoder, curByte);
+ _previousByte = curByte;
+ _additionalOffset--;
+ nowPos64++;
+ }
+ if (_matchFinder.GetNumAvailableBytes() == 0)
+ {
+ Flush((int)nowPos64);
+ return;
+ }
+ while (true)
+ {
+
+ int len = GetOptimum((int)nowPos64);
+ int pos = backRes;
+ int posState = ((int)nowPos64) & _posStateMask;
+ int complexState = (_state << Base.kNumPosStatesBitsMax) + posState;
+ if (len == 1 && pos == -1)
+ {
+ _rangeEncoder.Encode(_isMatch, complexState, 0);
+ byte curByte = _matchFinder.GetIndexByte((int)(0 - _additionalOffset));
+ LiteralEncoder.Encoder2 subCoder = _literalEncoder.GetSubCoder((int)nowPos64, _previousByte);
+ if (!Base.StateIsCharState(_state))
+ {
+ byte matchByte = _matchFinder.GetIndexByte((int)(0 - _repDistances[0] - 1 - _additionalOffset));
+ subCoder.EncodeMatched(_rangeEncoder, matchByte, curByte);
+ }
+ else
+ subCoder.Encode(_rangeEncoder, curByte);
+ _previousByte = curByte;
+ _state = Base.StateUpdateChar(_state);
+ }
+ else
+ {
+ _rangeEncoder.Encode(_isMatch, complexState, 1);
+ if (pos < Base.kNumRepDistances)
+ {
+ _rangeEncoder.Encode(_isRep, _state, 1);
+ if (pos == 0)
+ {
+ _rangeEncoder.Encode(_isRepG0, _state, 0);
+ if (len == 1)
+ _rangeEncoder.Encode(_isRep0Long, complexState, 0);
+ else
+ _rangeEncoder.Encode(_isRep0Long, complexState, 1);
+ }
+ else
+ {
+ _rangeEncoder.Encode(_isRepG0, _state, 1);
+ if (pos == 1)
+ _rangeEncoder.Encode(_isRepG1, _state, 0);
+ else
+ {
+ _rangeEncoder.Encode(_isRepG1, _state, 1);
+ _rangeEncoder.Encode(_isRepG2, _state, pos - 2);
+ }
+ }
+ if (len == 1)
+ _state = Base.StateUpdateShortRep(_state);
+ else
+ {
+ _repMatchLenEncoder.Encode(_rangeEncoder, len - Base.kMatchMinLen, posState);
+ _state = Base.StateUpdateRep(_state);
+ }
+ int distance = _repDistances[pos];
+ if (pos != 0)
+ {
+ for (int i = pos; i >= 1; i--)
+ _repDistances[i] = _repDistances[i - 1];
+ _repDistances[0] = distance;
+ }
+ }
+ else
+ {
+ _rangeEncoder.Encode(_isRep, _state, 0);
+ _state = Base.StateUpdateMatch(_state);
+ _lenEncoder.Encode(_rangeEncoder, len - Base.kMatchMinLen, posState);
+ pos -= Base.kNumRepDistances;
+ int posSlot = GetPosSlot(pos);
+ int lenToPosState = Base.GetLenToPosState(len);
+ _posSlotEncoder[lenToPosState].Encode(_rangeEncoder, posSlot);
+
+ if (posSlot >= Base.kStartPosModelIndex)
+ {
+ int footerBits = (int)((posSlot >> 1) - 1);
+ int baseVal = ((2 | (posSlot & 1)) << footerBits);
+ int posReduced = pos - baseVal;
+
+ if (posSlot < Base.kEndPosModelIndex)
+ BitTreeEncoder.ReverseEncode(_posEncoders,
+ baseVal - posSlot - 1, _rangeEncoder, footerBits, posReduced);
+ else
+ {
+ _rangeEncoder.EncodeDirectBits(posReduced >> Base.kNumAlignBits, footerBits - Base.kNumAlignBits);
+ _posAlignEncoder.ReverseEncode(_rangeEncoder, posReduced & Base.kAlignMask);
+ _alignPriceCount++;
+ }
+ }
+ int distance = pos;
+ for (int i = Base.kNumRepDistances - 1; i >= 1; i--)
+ _repDistances[i] = _repDistances[i - 1];
+ _repDistances[0] = distance;
+ _matchPriceCount++;
+ }
+ _previousByte = _matchFinder.GetIndexByte(len - 1 - _additionalOffset);
+ }
+ _additionalOffset -= len;
+ nowPos64 += len;
+ if (_additionalOffset == 0)
+ {
+ // if (!_fastMode)
+ if (_matchPriceCount >= (1 << 7))
+ FillDistancesPrices();
+ if (_alignPriceCount >= Base.kAlignTableSize)
+ FillAlignPrices();
+ inSize[0] = nowPos64;
+ outSize[0] = _rangeEncoder.GetProcessedSizeAdd();
+ if (_matchFinder.GetNumAvailableBytes() == 0)
+ {
+ Flush((int)nowPos64);
+ return;
+ }
+
+ if (nowPos64 - progressPosValuePrev >= (1 << 12))
+ {
+ _finished = false;
+ finished[0] = false;
+ return;
+ }
+ }
+ }
+ }
+
+ void ReleaseMFStream()
+ {
+ if (_matchFinder != null && _needReleaseMFStream)
+ {
+ _matchFinder.ReleaseStream();
+ _needReleaseMFStream = false;
+ }
+ }
+
+ void SetOutStream(java.io.OutputStream outStream)
+ { _rangeEncoder.SetStream(outStream); }
+ void ReleaseOutStream()
+ { _rangeEncoder.ReleaseStream(); }
+
+ void ReleaseStreams()
+ {
+ ReleaseMFStream();
+ ReleaseOutStream();
+ }
+
+ void SetStreams(java.io.InputStream inStream, java.io.OutputStream outStream,
+ long inSize, long outSize)
+ {
+ _inStream = inStream;
+ _finished = false;
+ Create();
+ SetOutStream(outStream);
+ Init();
+
+ // if (!_fastMode)
+ {
+ FillDistancesPrices();
+ FillAlignPrices();
+ }
+
+ _lenEncoder.SetTableSize(_numFastBytes + 1 - Base.kMatchMinLen);
+ _lenEncoder.UpdateTables(1 << _posStateBits);
+ _repMatchLenEncoder.SetTableSize(_numFastBytes + 1 - Base.kMatchMinLen);
+ _repMatchLenEncoder.UpdateTables(1 << _posStateBits);
+
+ nowPos64 = 0;
+ }
+
+ long[] processedInSize = new long[1]; long[] processedOutSize = new long[1]; boolean[] finished = new boolean[1];
+ public void Code(java.io.InputStream inStream, java.io.OutputStream outStream,
+ long inSize, long outSize, ICodeProgress progress) throws IOException
+ {
+ _needReleaseMFStream = false;
+ try
+ {
+ SetStreams(inStream, outStream, inSize, outSize);
+ while (true)
+ {
+
+
+
+ CodeOneBlock(processedInSize, processedOutSize, finished);
+ if (finished[0])
+ return;
+ if (progress != null)
+ {
+ progress.SetProgress(processedInSize[0], processedOutSize[0]);
+ }
+ }
+ }
+ finally
+ {
+ ReleaseStreams();
+ }
+ }
+
+ public static final int kPropSize = 5;
+ byte[] properties = new byte[kPropSize];
+
+ public void WriteCoderProperties(java.io.OutputStream outStream) throws IOException
+ {
+ properties[0] = (byte)((_posStateBits * 5 + _numLiteralPosStateBits) * 9 + _numLiteralContextBits);
+ for (int i = 0; i < 4; i++)
+ properties[1 + i] = (byte)(_dictionarySize >> (8 * i));
+ outStream.write(properties, 0, kPropSize);
+ }
+
+ int[] tempPrices = new int[Base.kNumFullDistances];
+ int _matchPriceCount;
+
+ void FillDistancesPrices()
+ {
+ for (int i = Base.kStartPosModelIndex; i < Base.kNumFullDistances; i++)
+ {
+ int posSlot = GetPosSlot(i);
+ int footerBits = (int)((posSlot >> 1) - 1);
+ int baseVal = ((2 | (posSlot & 1)) << footerBits);
+ tempPrices[i] = BitTreeEncoder.ReverseGetPrice(_posEncoders,
+ baseVal - posSlot - 1, footerBits, i - baseVal);
+ }
+
+ for (int lenToPosState = 0; lenToPosState < Base.kNumLenToPosStates; lenToPosState++)
+ {
+ int posSlot;
+ BitTreeEncoder encoder = _posSlotEncoder[lenToPosState];
+
+ int st = (lenToPosState << Base.kNumPosSlotBits);
+ for (posSlot = 0; posSlot < _distTableSize; posSlot++)
+ _posSlotPrices[st + posSlot] = encoder.GetPrice(posSlot);
+ for (posSlot = Base.kEndPosModelIndex; posSlot < _distTableSize; posSlot++)
+ _posSlotPrices[st + posSlot] += ((((posSlot >> 1) - 1) - Base.kNumAlignBits) << SevenZip.Compression.RangeCoder.Encoder.kNumBitPriceShiftBits);
+
+ int st2 = lenToPosState * Base.kNumFullDistances;
+ int i;
+ for (i = 0; i < Base.kStartPosModelIndex; i++)
+ _distancesPrices[st2 + i] = _posSlotPrices[st + i];
+ for (; i < Base.kNumFullDistances; i++)
+ _distancesPrices[st2 + i] = _posSlotPrices[st + GetPosSlot(i)] + tempPrices[i];
+ }
+ _matchPriceCount = 0;
+ }
+
+ void FillAlignPrices()
+ {
+ for (int i = 0; i < Base.kAlignTableSize; i++)
+ _alignPrices[i] = _posAlignEncoder.ReverseGetPrice(i);
+ _alignPriceCount = 0;
+ }
+
+
+ public boolean SetAlgorithm(int algorithm)
+ {
+ /*
+ _fastMode = (algorithm == 0);
+ _maxMode = (algorithm >= 2);
+ */
+ return true;
+ }
+
+ public boolean SetDictionarySize(int dictionarySize)
+ {
+ int kDicLogSizeMaxCompress = 29;
+ if (dictionarySize < (1 << Base.kDicLogSizeMin) || dictionarySize > (1 << kDicLogSizeMaxCompress))
+ return false;
+ _dictionarySize = dictionarySize;
+ int dicLogSize;
+ for (dicLogSize = 0; dictionarySize > (1 << dicLogSize); dicLogSize++) ;
+ _distTableSize = dicLogSize * 2;
+ return true;
+ }
+
+ public boolean SetNumFastBytes(int numFastBytes)
+ {
+ if (numFastBytes < 5 || numFastBytes > Base.kMatchMaxLen)
+ return false;
+ _numFastBytes = numFastBytes;
+ return true;
+ }
+
+ public boolean SetMatchFinder(int matchFinderIndex)
+ {
+ if (matchFinderIndex < 0 || matchFinderIndex > 2)
+ return false;
+ int matchFinderIndexPrev = _matchFinderType;
+ _matchFinderType = matchFinderIndex;
+ if (_matchFinder != null && matchFinderIndexPrev != _matchFinderType)
+ {
+ _dictionarySizePrev = -1;
+ _matchFinder = null;
+ }
+ return true;
+ }
+
+ public boolean SetLcLpPb(int lc, int lp, int pb)
+ {
+ if (
+ lp < 0 || lp > Base.kNumLitPosStatesBitsEncodingMax ||
+ lc < 0 || lc > Base.kNumLitContextBitsMax ||
+ pb < 0 || pb > Base.kNumPosStatesBitsEncodingMax)
+ return false;
+ _numLiteralPosStateBits = lp;
+ _numLiteralContextBits = lc;
+ _posStateBits = pb;
+ _posStateMask = ((1) << _posStateBits) - 1;
+ return true;
+ }
+
+ public void SetEndMarkerMode(boolean endMarkerMode)
+ {
+ _writeEndMark = endMarkerMode;
+ }
+}
+
diff --git a/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/BitTreeDecoder.java b/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/BitTreeDecoder.java new file mode 100644 index 0000000000..6864c69cef --- /dev/null +++ b/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/BitTreeDecoder.java @@ -0,0 +1,55 @@ +package SevenZip.Compression.RangeCoder;
+
+public class BitTreeDecoder
+{
+ short[] Models;
+ int NumBitLevels;
+
+ public BitTreeDecoder(int numBitLevels)
+ {
+ NumBitLevels = numBitLevels;
+ Models = new short[1 << numBitLevels];
+ }
+
+ public void Init()
+ {
+ Decoder.InitBitModels(Models);
+ }
+
+ public int Decode(Decoder rangeDecoder) throws java.io.IOException
+ {
+ int m = 1;
+ for (int bitIndex = NumBitLevels; bitIndex != 0; bitIndex--)
+ m = (m << 1) + rangeDecoder.DecodeBit(Models, m);
+ return m - (1 << NumBitLevels);
+ }
+
+ public int ReverseDecode(Decoder rangeDecoder) throws java.io.IOException
+ {
+ int m = 1;
+ int symbol = 0;
+ for (int bitIndex = 0; bitIndex < NumBitLevels; bitIndex++)
+ {
+ int bit = rangeDecoder.DecodeBit(Models, m);
+ m <<= 1;
+ m += bit;
+ symbol |= (bit << bitIndex);
+ }
+ return symbol;
+ }
+
+ public static int ReverseDecode(short[] Models, int startIndex,
+ Decoder rangeDecoder, int NumBitLevels) throws java.io.IOException
+ {
+ int m = 1;
+ int symbol = 0;
+ for (int bitIndex = 0; bitIndex < NumBitLevels; bitIndex++)
+ {
+ int bit = rangeDecoder.DecodeBit(Models, startIndex + m);
+ m <<= 1;
+ m += bit;
+ symbol |= (bit << bitIndex);
+ }
+ return symbol;
+ }
+}
diff --git a/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/BitTreeEncoder.java b/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/BitTreeEncoder.java new file mode 100644 index 0000000000..b4c0a0721d --- /dev/null +++ b/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/BitTreeEncoder.java @@ -0,0 +1,99 @@ +package SevenZip.Compression.RangeCoder;
+import java.io.IOException;
+
+public class BitTreeEncoder
+{
+ short[] Models;
+ int NumBitLevels;
+
+ public BitTreeEncoder(int numBitLevels)
+ {
+ NumBitLevels = numBitLevels;
+ Models = new short[1 << numBitLevels];
+ }
+
+ public void Init()
+ {
+ Decoder.InitBitModels(Models);
+ }
+
+ public void Encode(Encoder rangeEncoder, int symbol) throws IOException
+ {
+ int m = 1;
+ for (int bitIndex = NumBitLevels; bitIndex != 0; )
+ {
+ bitIndex--;
+ int bit = (symbol >>> bitIndex) & 1;
+ rangeEncoder.Encode(Models, m, bit);
+ m = (m << 1) | bit;
+ }
+ }
+
+ public void ReverseEncode(Encoder rangeEncoder, int symbol) throws IOException
+ {
+ int m = 1;
+ for (int i = 0; i < NumBitLevels; i++)
+ {
+ int bit = symbol & 1;
+ rangeEncoder.Encode(Models, m, bit);
+ m = (m << 1) | bit;
+ symbol >>= 1;
+ }
+ }
+
+ public int GetPrice(int symbol)
+ {
+ int price = 0;
+ int m = 1;
+ for (int bitIndex = NumBitLevels; bitIndex != 0; )
+ {
+ bitIndex--;
+ int bit = (symbol >>> bitIndex) & 1;
+ price += Encoder.GetPrice(Models[m], bit);
+ m = (m << 1) + bit;
+ }
+ return price;
+ }
+
+ public int ReverseGetPrice(int symbol)
+ {
+ int price = 0;
+ int m = 1;
+ for (int i = NumBitLevels; i != 0; i--)
+ {
+ int bit = symbol & 1;
+ symbol >>>= 1;
+ price += Encoder.GetPrice(Models[m], bit);
+ m = (m << 1) | bit;
+ }
+ return price;
+ }
+
+ public static int ReverseGetPrice(short[] Models, int startIndex,
+ int NumBitLevels, int symbol)
+ {
+ int price = 0;
+ int m = 1;
+ for (int i = NumBitLevels; i != 0; i--)
+ {
+ int bit = symbol & 1;
+ symbol >>>= 1;
+ price += Encoder.GetPrice(Models[startIndex + m], bit);
+ m = (m << 1) | bit;
+ }
+ return price;
+ }
+
+ public static void ReverseEncode(short[] Models, int startIndex,
+ Encoder rangeEncoder, int NumBitLevels, int symbol) throws IOException
+ {
+ int m = 1;
+ for (int i = 0; i < NumBitLevels; i++)
+ {
+ int bit = symbol & 1;
+ rangeEncoder.Encode(Models, startIndex + m, bit);
+ m = (m << 1) | bit;
+ symbol >>= 1;
+ }
+ }
+}
diff --git a/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/Decoder.java b/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/Decoder.java new file mode 100644 index 0000000000..7453383483 --- /dev/null +++ b/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/Decoder.java @@ -0,0 +1,88 @@ +package SevenZip.Compression.RangeCoder;
+import java.io.IOException;
+
+public class Decoder
+{
+ static final int kTopMask = ~((1 << 24) - 1);
+
+ static final int kNumBitModelTotalBits = 11;
+ static final int kBitModelTotal = (1 << kNumBitModelTotalBits);
+ static final int kNumMoveBits = 5;
+
+ int Range;
+ int Code;
+
+ java.io.InputStream Stream;
+
+ public final void SetStream(java.io.InputStream stream)
+ {
+ Stream = stream;
+ }
+
+ public final void ReleaseStream()
+ {
+ Stream = null;
+ }
+
+ public final void Init() throws IOException
+ {
+ Code = 0;
+ Range = -1;
+ for (int i = 0; i < 5; i++)
+ Code = (Code << 8) | Stream.read();
+ }
+
+ public final int DecodeDirectBits(int numTotalBits) throws IOException
+ {
+ int result = 0;
+ for (int i = numTotalBits; i != 0; i--)
+ {
+ Range >>>= 1;
+ int t = ((Code - Range) >>> 31);
+ Code -= Range & (t - 1);
+ result = (result << 1) | (1 - t);
+
+ if ((Range & kTopMask) == 0)
+ {
+ Code = (Code << 8) | Stream.read();
+ Range <<= 8;
+ }
+ }
+ return result;
+ }
+
+ public int DecodeBit(short []probs, int index) throws IOException
+ {
+ int prob = probs[index];
+ int newBound = (Range >>> kNumBitModelTotalBits) * prob;
+ if ((Code ^ 0x80000000) < (newBound ^ 0x80000000))
+ {
+ Range = newBound;
+ probs[index] = (short)(prob + ((kBitModelTotal - prob) >>> kNumMoveBits));
+ if ((Range & kTopMask) == 0)
+ {
+ Code = (Code << 8) | Stream.read();
+ Range <<= 8;
+ }
+ return 0;
+ }
+ else
+ {
+ Range -= newBound;
+ Code -= newBound;
+ probs[index] = (short)(prob - ((prob) >>> kNumMoveBits));
+ if ((Range & kTopMask) == 0)
+ {
+ Code = (Code << 8) | Stream.read();
+ Range <<= 8;
+ }
+ return 1;
+ }
+ }
+
+ public static void InitBitModels(short []probs)
+ {
+ for (int i = 0; i < probs.length; i++)
+ probs[i] = (kBitModelTotal >>> 1);
+ }
+}
diff --git a/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/Encoder.java b/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/Encoder.java new file mode 100644 index 0000000000..2273e92e50 --- /dev/null +++ b/other-licenses/7zstub/src/Java/SevenZip/Compression/RangeCoder/Encoder.java @@ -0,0 +1,151 @@ +package SevenZip.Compression.RangeCoder;
+import java.io.IOException;
+
+public class Encoder
+{
+ static final int kTopMask = ~((1 << 24) - 1);
+
+ static final int kNumBitModelTotalBits = 11;
+ static final int kBitModelTotal = (1 << kNumBitModelTotalBits);
+ static final int kNumMoveBits = 5;
+
+ java.io.OutputStream Stream;
+
+ long Low;
+ int Range;
+ int _cacheSize;
+ int _cache;
+
+ long _position;
+
+ public void SetStream(java.io.OutputStream stream)
+ {
+ Stream = stream;
+ }
+
+ public void ReleaseStream()
+ {
+ Stream = null;
+ }
+
+ public void Init()
+ {
+ _position = 0;
+ Low = 0;
+ Range = -1;
+ _cacheSize = 1;
+ _cache = 0;
+ }
+
+ public void FlushData() throws IOException
+ {
+ for (int i = 0; i < 5; i++)
+ ShiftLow();
+ }
+
+ public void FlushStream() throws IOException
+ {
+ Stream.flush();
+ }
+
+ public void ShiftLow() throws IOException
+ {
+ int LowHi = (int)(Low >>> 32);
+ if (LowHi != 0 || Low < 0xFF000000L)
+ {
+ _position += _cacheSize;
+ int temp = _cache;
+ do
+ {
+ Stream.write(temp + LowHi);
+ temp = 0xFF;
+ }
+ while(--_cacheSize != 0);
+ _cache = (((int)Low) >>> 24);
+ }
+ _cacheSize++;
+ Low = (Low & 0xFFFFFF) << 8;
+ }
+
+ public void EncodeDirectBits(int v, int numTotalBits) throws IOException
+ {
+ for (int i = numTotalBits - 1; i >= 0; i--)
+ {
+ Range >>>= 1;
+ if (((v >>> i) & 1) == 1)
+ Low += Range;
+ if ((Range & Encoder.kTopMask) == 0)
+ {
+ Range <<= 8;
+ ShiftLow();
+ }
+ }
+ }
+
+
+ public long GetProcessedSizeAdd()
+ {
+ return _cacheSize + _position + 4;
+ }
+
+
+
+ static final int kNumMoveReducingBits = 2;
+ public static final int kNumBitPriceShiftBits = 6;
+
+ public static void InitBitModels(short []probs)
+ {
+ for (int i = 0; i < probs.length; i++)
+ probs[i] = (kBitModelTotal >>> 1);
+ }
+
+ public void Encode(short []probs, int index, int symbol) throws IOException
+ {
+ int prob = probs[index];
+ int newBound = (Range >>> kNumBitModelTotalBits) * prob;
+ if (symbol == 0)
+ {
+ Range = newBound;
+ probs[index] = (short)(prob + ((kBitModelTotal - prob) >>> kNumMoveBits));
+ }
+ else
+ {
+ Low += (newBound & 0xFFFFFFFFL);
+ Range -= newBound;
+ probs[index] = (short)(prob - ((prob) >>> kNumMoveBits));
+ }
+ if ((Range & kTopMask) == 0)
+ {
+ Range <<= 8;
+ ShiftLow();
+ }
+ }
+
+ private static int[] ProbPrices = new int[kBitModelTotal >>> kNumMoveReducingBits];
+
+ static
+ {
+ int kNumBits = (kNumBitModelTotalBits - kNumMoveReducingBits);
+ for (int i = kNumBits - 1; i >= 0; i--)
+ {
+ int start = 1 << (kNumBits - i - 1);
+ int end = 1 << (kNumBits - i);
+ for (int j = start; j < end; j++)
+ ProbPrices[j] = (i << kNumBitPriceShiftBits) +
+ (((end - j) << kNumBitPriceShiftBits) >>> (kNumBits - i - 1));
+ }
+ }
+
+ static public int GetPrice(int Prob, int symbol)
+ {
+ return ProbPrices[(((Prob - symbol) ^ ((-symbol))) & (kBitModelTotal - 1)) >>> kNumMoveReducingBits];
+ }
+ static public int GetPrice0(int Prob)
+ {
+ return ProbPrices[Prob >>> kNumMoveReducingBits];
+ }
+ static public int GetPrice1(int Prob)
+ {
+ return ProbPrices[(kBitModelTotal - Prob) >>> kNumMoveReducingBits];
+ }
+}
|