Keep only base/extractor.[cc|h].

third_party/lzma/v4_65/files/CS/7zip/Compress/LZMA/LzmaBase.cs

-// 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;
-        }
-}