BOS.* -> BOS.*

BinaryObjectScanner.Compression/bzip2/EState.cs

@@ -0,0 +1,80 @@
+using static BinaryObjectScanner.Compression.bzip2.Constants;
+
+namespace BinaryObjectScanner.Compression.bzip2
+{
+    /// <summary>
+    /// Structure holding all the compression-side stuff.
+    /// </summary>
+    /// <see href="https://github.com/ladislav-zezula/StormLib/blob/master/src/bzip2/bzlib_private.h"/>
+    internal unsafe class EState
+    {
+        /* pointer back to the struct bz_stream */
+        public bz_stream* strm;
+
+        /* mode this stream is in, and whether inputting */
+        /* or outputting data */
+        public int mode;
+        public int state;
+
+        /* remembers avail_in when flush/finish requested */
+        public uint avail_in_expect;
+
+        /* for doing the block sorting */
+        public uint* arr1;
+        public uint* arr2;
+        public uint* ftab;
+        public int origPtr;
+
+        /* aliases for arr1 and arr2 */
+        public uint* ptr;
+        public byte* block;
+        public ushort* mtfv;
+        public byte* zbits;
+
+        /* for deciding when to use the fallback sorting algorithm */
+        public int workFactor;
+
+        /* run-length-encoding of the input */
+        public uint state_in_ch;
+        public int state_in_len;
+        public int rNToGo;
+        public int rTPos;
+
+        /* input and output limits and current posns */
+        public int nblock;
+        public int nblockMAX;
+        public int numZ;
+        public int state_out_pos;
+
+        /* map of bytes used in block */
+        public int nInUse;
+        public bool[] inUse = new bool[256];
+        public byte[] unseqToSeq = new byte[256];
+
+        /* the buffer for bit stream creation */
+        public uint bsBuff;
+        public int bsLive;
+
+        /* block and combined CRCs */
+        public uint blockCRC;
+        public uint combinedCRC;
+
+        /* misc administratium */
+        public int verbosity;
+        public int blockNo;
+        public int blockSize100k;
+
+        /* stuff for coding the MTF values */
+        public int nMTF;
+        public int[] mtfFreq = new int[BZ_MAX_ALPHA_SIZE];
+        public byte[] selector = new byte[BZ_MAX_SELECTORS];
+        public byte[] selectorMtf = new byte[BZ_MAX_SELECTORS];
+
+        public byte[,] len = new byte[BZ_N_GROUPS, BZ_MAX_ALPHA_SIZE];
+        public int[,] code = new int[BZ_N_GROUPS, BZ_MAX_ALPHA_SIZE];
+        public int[,] rfreq = new int[BZ_N_GROUPS, BZ_MAX_ALPHA_SIZE];
+
+        /* second dimension: only 3 needed; 4 makes index calculations faster */
+        public uint[,] len_pack = new uint[BZ_MAX_ALPHA_SIZE, 4];
+    }
+}