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| author | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-03-29 16:04:01 +0100 |
|---|---|---|
| committer | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-03-29 16:04:01 +0100 |
| commit | 88083f8c683c18f4de68a20c863a82a9da65db8f (patch) | |
| tree | 926656892d9d80260da02ea8ea71031b140c51df /other-licenses/7zstub/src/CS/7zip/Compress/LZMA/LzmaBase.cs | |
| parent | f999f544aad04069b03704d994a99352263f600b (diff) | |
| parent | 843e4ceffd6ce21a6e6db37419335eafdc543e18 (diff) | |
| download | UXP-88083f8c683c18f4de68a20c863a82a9da65db8f.tar UXP-88083f8c683c18f4de68a20c863a82a9da65db8f.tar.gz UXP-88083f8c683c18f4de68a20c863a82a9da65db8f.tar.lz UXP-88083f8c683c18f4de68a20c863a82a9da65db8f.tar.xz UXP-88083f8c683c18f4de68a20c863a82a9da65db8f.zip | |
Merge branch 'master' into Sync-weave
Diffstat (limited to 'other-licenses/7zstub/src/CS/7zip/Compress/LZMA/LzmaBase.cs')
| -rw-r--r-- | other-licenses/7zstub/src/CS/7zip/Compress/LZMA/LzmaBase.cs | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/CS/7zip/Compress/LZMA/LzmaBase.cs b/other-licenses/7zstub/src/CS/7zip/Compress/LZMA/LzmaBase.cs new file mode 100644 index 000000000..8447a2a0f --- /dev/null +++ b/other-licenses/7zstub/src/CS/7zip/Compress/LZMA/LzmaBase.cs @@ -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;
+ }
+}
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