summaryrefslogtreecommitdiff
path: root/Build/source/utils/lzma/src/sdk/7zip/Compress/LZMA/LZMA.h
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/utils/lzma/src/sdk/7zip/Compress/LZMA/LZMA.h')
-rw-r--r--Build/source/utils/lzma/src/sdk/7zip/Compress/LZMA/LZMA.h82
1 files changed, 82 insertions, 0 deletions
diff --git a/Build/source/utils/lzma/src/sdk/7zip/Compress/LZMA/LZMA.h b/Build/source/utils/lzma/src/sdk/7zip/Compress/LZMA/LZMA.h
new file mode 100644
index 00000000000..7bc4c438af3
--- /dev/null
+++ b/Build/source/utils/lzma/src/sdk/7zip/Compress/LZMA/LZMA.h
@@ -0,0 +1,82 @@
+// LZMA.h
+
+#ifndef __LZMA_H
+#define __LZMA_H
+
+namespace NCompress {
+namespace NLZMA {
+
+const UInt32 kNumRepDistances = 4;
+
+const int kNumStates = 12;
+
+const Byte kLiteralNextStates[kNumStates] = {0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 4, 5};
+const Byte kMatchNextStates[kNumStates] = {7, 7, 7, 7, 7, 7, 7, 10, 10, 10, 10, 10};
+const Byte kRepNextStates[kNumStates] = {8, 8, 8, 8, 8, 8, 8, 11, 11, 11, 11, 11};
+const Byte kShortRepNextStates[kNumStates]= {9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11};
+
+class CState
+{
+public:
+ Byte Index;
+ void Init() { Index = 0; }
+ void UpdateChar() { Index = kLiteralNextStates[Index]; }
+ void UpdateMatch() { Index = kMatchNextStates[Index]; }
+ void UpdateRep() { Index = kRepNextStates[Index]; }
+ void UpdateShortRep() { Index = kShortRepNextStates[Index]; }
+ bool IsCharState() const { return Index < 7; }
+};
+
+const int kNumPosSlotBits = 6;
+const int kDicLogSizeMin = 0;
+const int kDicLogSizeMax = 32;
+const int kDistTableSizeMax = kDicLogSizeMax * 2;
+
+const UInt32 kNumLenToPosStates = 4;
+
+inline UInt32 GetLenToPosState(UInt32 len)
+{
+ len -= 2;
+ if (len < kNumLenToPosStates)
+ return len;
+ return kNumLenToPosStates - 1;
+}
+
+namespace NLength {
+
+const int kNumPosStatesBitsMax = 4;
+const UInt32 kNumPosStatesMax = (1 << kNumPosStatesBitsMax);
+
+const int kNumPosStatesBitsEncodingMax = 4;
+const UInt32 kNumPosStatesEncodingMax = (1 << kNumPosStatesBitsEncodingMax);
+
+const int kNumLowBits = 3;
+const int kNumMidBits = 3;
+const int kNumHighBits = 8;
+const UInt32 kNumLowSymbols = 1 << kNumLowBits;
+const UInt32 kNumMidSymbols = 1 << kNumMidBits;
+const UInt32 kNumSymbolsTotal = kNumLowSymbols + kNumMidSymbols + (1 << kNumHighBits);
+
+}
+
+const UInt32 kMatchMinLen = 2;
+const UInt32 kMatchMaxLen = kMatchMinLen + NLength::kNumSymbolsTotal - 1;
+
+const int kNumAlignBits = 4;
+const UInt32 kAlignTableSize = 1 << kNumAlignBits;
+const UInt32 kAlignMask = (kAlignTableSize - 1);
+
+const UInt32 kStartPosModelIndex = 4;
+const UInt32 kEndPosModelIndex = 14;
+const UInt32 kNumPosModels = kEndPosModelIndex - kStartPosModelIndex;
+
+const UInt32 kNumFullDistances = 1 << (kEndPosModelIndex / 2);
+
+const int kNumLitPosStatesBitsEncodingMax = 4;
+const int kNumLitContextBitsMax = 8;
+
+const int kNumMoveBits = 5;
+
+}}
+
+#endif