diff --git a/crypto/bzip2/src/BZip2Constants.cs b/crypto/bzip2/src/BZip2Constants.cs
deleted file mode 100644
index d238c5b76..000000000
--- a/crypto/bzip2/src/BZip2Constants.cs
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-/*
- * This package is based on the work done by Keiron Liddle, Aftex Software
- * <keiron@aftexsw.com> to whom the Ant project is very grateful for his
- * great code.
- */
-
-using System;
-
-namespace Org.BouncyCastle.Apache.Bzip2
-{
- /**
- * Base class for both the compress and decompress classes.
- * Holds common arrays, and static data.
- *
- * @author <a href="mailto:keiron@aftexsw.com">Keiron Liddle</a>
- */
- public class BZip2Constants
- {
- public const int baseBlockSize = 100000;
- public const int MAX_ALPHA_SIZE = 258;
- public const int MAX_CODE_LEN = 20;
- public const int MAX_CODE_LEN_GEN = 17;
- public const int RUNA = 0;
- public const int RUNB = 1;
- public const int N_GROUPS = 6;
- public const int G_SIZE = 50;
- public const int N_ITERS = 4;
- public const int MAX_SELECTORS = 2 + (900000 / G_SIZE);
- public const int NUM_OVERSHOOT_BYTES = 20;
- }
-}
diff --git a/crypto/bzip2/src/CBZip2InputStream.cs b/crypto/bzip2/src/CBZip2InputStream.cs
deleted file mode 100644
index c3125a4e7..000000000
--- a/crypto/bzip2/src/CBZip2InputStream.cs
+++ /dev/null
@@ -1,810 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-/*
- * This package is based on the work done by Keiron Liddle, Aftex Software
- * <keiron@aftexsw.com> to whom the Ant project is very grateful for his
- * great code.
- */
-
-using System;
-using System.Diagnostics;
-using System.IO;
-
-using Org.BouncyCastle.Utilities;
-using Org.BouncyCastle.Utilities.IO;
-
-namespace Org.BouncyCastle.Apache.Bzip2
-{
- /**
- * An input stream that decompresses from the BZip2 format (with the file
- * header chars) to be read as any other stream.
- *
- * @author <a href="mailto:keiron@aftexsw.com">Keiron Liddle</a>
- *
- * <b>NB:</b> note this class has been modified to read the leading BZ from the
- * start of the BZIP2 stream to make it compatible with other PGP programs.
- */
- public class CBZip2InputStream
- : BaseInputStream
- {
- /*
- index of the last char in the block, so
- the block size == last + 1.
- */
- private int last;
-
- /*
- index in zptr[] of original string after sorting.
- */
- private int origPtr;
-
- /*
- always: in the range 0 .. 9.
- The current block size is 100000 * this number.
- */
- private int blockSize100k;
-
- private int bsBuff;
- private int bsLive;
- private readonly CRC m_blockCrc = new CRC();
-
- private int nInUse;
-
- private byte[] seqToUnseq = new byte[256];
-
- private byte[] m_selectors = new byte[BZip2Constants.MAX_SELECTORS];
-
- private int[] tt;
- private byte[] ll8;
-
- /*
- freq table collected to save a pass over the data
- during decompression.
- */
- private int[] unzftab = new int[256];
-
- private int[][] limit = CreateIntArray(BZip2Constants.N_GROUPS, BZip2Constants.MAX_CODE_LEN + 1);
- private int[][] basev = CreateIntArray(BZip2Constants.N_GROUPS, BZip2Constants.MAX_CODE_LEN + 1);
- private int[][] perm = CreateIntArray(BZip2Constants.N_GROUPS, BZip2Constants.MAX_ALPHA_SIZE);
- private int[] minLens = new int[BZip2Constants.N_GROUPS];
-
- private Stream bsStream;
-
- private bool streamEnd = false;
-
- private int currentByte = -1;
-
- private const int RAND_PART_B_STATE = 1;
- private const int RAND_PART_C_STATE = 2;
- private const int NO_RAND_PART_B_STATE = 3;
- private const int NO_RAND_PART_C_STATE = 4;
-
- private int currentState = 0;
-
- private int m_expectedBlockCrc, m_expectedStreamCrc, m_streamCrc;
-
- int i2, count, chPrev, ch2;
- int i, tPos;
- int rNToGo = 0;
- int rTPos = 0;
- int j2;
- int z;
-
- public CBZip2InputStream(Stream zStream)
- {
- ll8 = null;
- tt = null;
- bsStream = zStream;
- bsLive = 0;
- bsBuff = 0;
-
- int magic1 = bsStream.ReadByte();
- int magic2 = bsStream.ReadByte();
- int version = bsStream.ReadByte();
- int level = bsStream.ReadByte();
- if (level < 0)
- throw new EndOfStreamException();
-
- if (magic1 != 'B' | magic2 != 'Z' | version != 'h' | level < '1' | level > '9')
- throw new IOException("Invalid stream header");
-
- blockSize100k = level - '0';
-
- int n = BZip2Constants.baseBlockSize * blockSize100k;
- ll8 = new byte[n];
- tt = new int[n];
-
- m_streamCrc = 0;
-
- BeginBlock();
- }
-
- public override int Read(byte[] buffer, int offset, int count)
- {
- Streams.ValidateBufferArguments(buffer, offset, count);
-
- /*
- * TODO The base class implementation allows to return partial data if/when ReadByte throws. That would be
- * be preferable here too (so don't override), but it would require that exceptions cause this instance to
- * permanently fail, and that needs review.
- */
- int pos = 0;
- while (pos < count)
- {
- int b = ReadByte();
- if (b < 0)
- break;
-
- buffer[offset + pos++] = (byte)b;
- }
- return pos;
- }
-
- public override int ReadByte()
- {
- if (streamEnd)
- return -1;
-
- int result = currentByte;
- switch (currentState)
- {
- case RAND_PART_B_STATE:
- SetupRandPartB();
- break;
- case RAND_PART_C_STATE:
- SetupRandPartC();
- break;
- case NO_RAND_PART_B_STATE:
- SetupNoRandPartB();
- break;
- case NO_RAND_PART_C_STATE:
- SetupNoRandPartC();
- break;
- default:
- throw new InvalidOperationException();
- }
- return result;
- }
-
- private void BeginBlock()
- {
- long magic48 = BsGetLong48();
- if (magic48 != 0x314159265359L)
- {
- if (magic48 != 0x177245385090L)
- throw new IOException("Block header error");
-
- m_expectedStreamCrc = BsGetInt32();
- if (m_expectedStreamCrc != m_streamCrc)
- throw new IOException("Stream CRC error");
-
- BsFinishedWithStream();
- streamEnd = true;
- return;
- }
-
- m_expectedBlockCrc = BsGetInt32();
-
- bool blockRandomised = BsGetBit() == 1;
-
- GetAndMoveToFrontDecode();
-
- m_blockCrc.Initialise();
-
- int[] cftab = new int[257];
- {
- int accum = 0;
- cftab[0] = 0;
- for (i = 0; i < 256; ++i)
- {
- accum += unzftab[i];
- cftab[i + 1] = accum;
- }
- if (accum != (last + 1))
- throw new InvalidOperationException();
- }
-
- for (i = 0; i <= last; i++)
- {
- byte ch = ll8[i];
- tt[cftab[ch]++] = i;
- }
-
- tPos = tt[origPtr];
-
- count = 0;
- i2 = 0;
- ch2 = 256; /* not a char and not EOF */
-
- if (blockRandomised)
- {
- rNToGo = 0;
- rTPos = 0;
- SetupRandPartA();
- }
- else
- {
- SetupNoRandPartA();
- }
- }
-
- private void EndBlock()
- {
- int blockFinalCrc = m_blockCrc.GetFinal();
- if (m_expectedBlockCrc != blockFinalCrc)
- throw new IOException("Block CRC error");
-
- m_streamCrc = Integers.RotateLeft(m_streamCrc, 1) ^ blockFinalCrc;
- }
-
- private void BsFinishedWithStream()
- {
- try
- {
- if (this.bsStream != null)
- {
- Platform.Dispose(this.bsStream);
- this.bsStream = null;
- }
- }
- catch
- {
- //ignore
- }
- }
-
- private int BsGetBit()
- {
- if (bsLive == 0)
- {
- bsBuff = RequireByte();
- bsLive = 7;
- return (int)((uint)bsBuff >> 7);
- }
-
- --bsLive;
-
- return (bsBuff >> bsLive) & 1;
- }
-
- private int BsGetBits(int n)
- {
- Debug.Assert(1 <= n && n <= 24);
-
- while (bsLive < n)
- {
- bsBuff = (bsBuff << 8) | RequireByte();
- bsLive += 8;
- }
-
- bsLive -= n;
-
- return (bsBuff >> bsLive) & ((1 << n) - 1);
- }
-
- private int BsGetBitsSmall(int n)
- {
- Debug.Assert(1 <= n && n <= 8);
-
- if (bsLive < n)
- {
- bsBuff = (bsBuff << 8) | RequireByte();
- bsLive += 8;
- }
-
- bsLive -= n;
-
- return (bsBuff >> bsLive) & ((1 << n) - 1);
- }
-
- private int BsGetInt32()
- {
- int u = BsGetBits(16) << 16;
- return u | BsGetBits(16);
- }
-
- private long BsGetLong48()
- {
- long u = (long)BsGetBits(24) << 24;
- return u | (long)BsGetBits(24);
- }
-
- private void HbCreateDecodeTables(int[] limit, int[] basev, int[] perm, byte[] length, int minLen, int maxLen,
- int alphaSize)
- {
- Array.Clear(basev, 0, basev.Length);
- Array.Clear(limit, 0, limit.Length);
-
- int pp = 0, baseVal = 0;
- for (int i = minLen; i <= maxLen; i++)
- {
- for (int j = 0; j < alphaSize; j++)
- {
- if (length[j] == i)
- {
- perm[pp++] = j;
- }
- }
- basev[i] = baseVal;
- limit[i] = baseVal + pp;
- baseVal += baseVal + pp;
- }
- }
-
- private int RecvDecodingTables()
- {
- int i, j;
-
- nInUse = 0;
-
- /* Receive the mapping table */
- int inUse16 = BsGetBits(16);
-
- for (i = 0; i < 16; ++i)
- {
- if ((inUse16 & (0x8000 >> i)) != 0)
- {
- int inUse = BsGetBits(16);
-
- int i16 = i * 16;
- for (j = 0; j < 16; ++j)
- {
- if ((inUse & (0x8000 >> j)) != 0)
- {
- seqToUnseq[nInUse++] = (byte)(i16 + j);
- }
- }
- }
- }
-
- if (nInUse < 1)
- throw new InvalidOperationException();
-
- int alphaSize = nInUse + 2;
-
- /* Now the selectors */
- int nGroups = BsGetBitsSmall(3);
- if (nGroups < 2 || nGroups > BZip2Constants.N_GROUPS)
- throw new InvalidOperationException();
-
- int nSelectors = BsGetBits(15);
- if (nSelectors < 1)
- throw new InvalidOperationException();
-
- uint mtfGroups = 0x00543210U;
- for (i = 0; i < nSelectors; i++)
- {
- int mtfSelector = 0;
- while (BsGetBit() == 1)
- {
- if (++mtfSelector >= nGroups)
- throw new InvalidOperationException();
- }
-
- // Ignore declared selectors in excess of the maximum usable number
- if (i >= BZip2Constants.MAX_SELECTORS)
- continue;
-
- // Undo the MTF value for the selector.
- switch (mtfSelector)
- {
- case 0:
- break;
- case 1:
- mtfGroups = (mtfGroups >> 4) & 0x00000FU | (mtfGroups << 4) & 0x0000F0U | mtfGroups & 0xFFFF00U;
- break;
- case 2:
- mtfGroups = (mtfGroups >> 8) & 0x00000FU | (mtfGroups << 4) & 0x000FF0U | mtfGroups & 0xFFF000U;
- break;
- case 3:
- mtfGroups = (mtfGroups >> 12) & 0x00000FU | (mtfGroups << 4) & 0x00FFF0U | mtfGroups & 0xFF0000U;
- break;
- case 4:
- mtfGroups = (mtfGroups >> 16) & 0x00000FU | (mtfGroups << 4) & 0x0FFFF0U | mtfGroups & 0xF00000U;
- break;
- case 5:
- mtfGroups = (mtfGroups >> 20) & 0x00000FU | (mtfGroups << 4) & 0xFFFFF0U;
- break;
- default:
- throw new InvalidOperationException();
- }
-
- m_selectors[i] = (byte)(mtfGroups & 0xF);
- }
-
- byte[] len_t = new byte[alphaSize];
-
- /* Now the coding tables */
- for (int t = 0; t < nGroups; t++)
- {
- int maxLen = 0, minLen = 32;
- int curr = BsGetBitsSmall(5);
- if ((curr < 1) | (curr > BZip2Constants.MAX_CODE_LEN))
- throw new InvalidOperationException();
-
- for (i = 0; i < alphaSize; i++)
- {
- int markerBit = BsGetBit();
- while (markerBit != 0)
- {
- int nextTwoBits = BsGetBitsSmall(2);
- curr += 1 - (nextTwoBits & 2);
- if ((curr < 1) | (curr > BZip2Constants.MAX_CODE_LEN))
- throw new InvalidOperationException();
- markerBit = nextTwoBits & 1;
- }
-
- len_t[i] = (byte)curr;
- maxLen = System.Math.Max(maxLen, curr);
- minLen = System.Math.Min(minLen, curr);
- }
-
- /* Create the Huffman decoding tables */
- HbCreateDecodeTables(limit[t], basev[t], perm[t], len_t, minLen, maxLen, alphaSize);
- minLens[t] = minLen;
- }
-
- return nSelectors;
- }
-
- private void GetAndMoveToFrontDecode()
- {
- int i, j, nextSym;
-
- int limitLast = BZip2Constants.baseBlockSize * blockSize100k;
-
- origPtr = BsGetBits(24);
- if (origPtr > 10 + limitLast)
- throw new InvalidOperationException();
-
- int nSelectors = RecvDecodingTables();
-
- int alphaSize = nInUse + 2;
- int EOB = nInUse + 1;
-
- /*
- Setting up the unzftab entries here is not strictly
- necessary, but it does save having to do it later
- in a separate pass, and so saves a block's worth of
- cache misses.
- */
- Array.Clear(unzftab, 0, unzftab.Length);
-
- byte[] yy = new byte[nInUse];
- for (i = 0; i < nInUse; ++i)
- {
- yy[i] = seqToUnseq[i];
- }
-
- last = -1;
-
- int groupNo = 0;
- int groupPos = BZip2Constants.G_SIZE - 1;
- int groupSel = m_selectors[groupNo];
- int groupMinLen = minLens[groupSel];
- int[] groupLimits = limit[groupSel];
- int[] groupPerm = perm[groupSel];
- int[] groupBase = basev[groupSel];
-
- {
- int zn = groupMinLen;
- int zvec = BsGetBits(groupMinLen);
- while (zvec >= groupLimits[zn])
- {
- if (++zn > BZip2Constants.MAX_CODE_LEN)
- throw new InvalidOperationException();
-
- zvec = (zvec << 1) | BsGetBit();
- }
- int permIndex = zvec - groupBase[zn];
- if (permIndex >= alphaSize)
- throw new InvalidOperationException();
-
- nextSym = groupPerm[permIndex];
- }
-
- while (nextSym != EOB)
- {
- //if (nextSym == BZip2Constants.RUNA || nextSym == BZip2Constants.RUNB)
- if (nextSym <= BZip2Constants.RUNB)
- {
- int n = 1, s = 0;
- do
- {
- if (n > 1024 * 1024)
- throw new InvalidOperationException();
-
- s += n << nextSym;
- n <<= 1;
-
- {
- if (groupPos == 0)
- {
- if (++groupNo >= nSelectors)
- throw new InvalidOperationException();
-
- groupPos = BZip2Constants.G_SIZE;
- groupSel = m_selectors[groupNo];
- groupMinLen = minLens[groupSel];
- groupLimits = limit[groupSel];
- groupPerm = perm[groupSel];
- groupBase = basev[groupSel];
- }
- groupPos--;
-
- int zn = groupMinLen;
- int zvec = BsGetBits(groupMinLen);
- while (zvec >= groupLimits[zn])
- {
- if (++zn > BZip2Constants.MAX_CODE_LEN)
- throw new InvalidOperationException();
-
- zvec = (zvec << 1) | BsGetBit();
- }
- int permIndex = zvec - groupBase[zn];
- if (permIndex >= alphaSize)
- throw new InvalidOperationException();
-
- nextSym = groupPerm[permIndex];
- }
- }
- //while (nextSym == BZip2Constants.RUNA || nextSym == BZip2Constants.RUNB);
- while (nextSym <= BZip2Constants.RUNB);
-
- byte ch = yy[0];
- unzftab[ch] += s;
-
- if (last >= limitLast - s)
- throw new InvalidOperationException("Block overrun");
-
- while (--s >= 0)
- {
- ll8[++last] = ch;
- }
-
- continue;
- }
- else
- {
- if (++last >= limitLast)
- throw new InvalidOperationException("Block overrun");
-
- byte tmp = yy[nextSym - 1];
- unzftab[tmp]++;
- ll8[last] = tmp;
-
- /*
- * This loop is hammered during decompression, hence avoid
- * native method call overhead of Array.Copy for very
- * small ranges to copy.
- */
- if (nextSym <= 16)
- {
- for (j = nextSym - 1; j > 0; --j)
- {
- yy[j] = yy[j - 1];
- }
- }
- else
- {
- Array.Copy(yy, 0, yy, 1, nextSym - 1);
- }
-
- yy[0] = tmp;
-
- {
- if (groupPos == 0)
- {
- if (++groupNo >= nSelectors)
- throw new InvalidOperationException();
-
- groupPos = BZip2Constants.G_SIZE;
- groupSel = m_selectors[groupNo];
- groupMinLen = minLens[groupSel];
- groupLimits = limit[groupSel];
- groupPerm = perm[groupSel];
- groupBase = basev[groupSel];
- }
- groupPos--;
-
- int zn = groupMinLen;
- int zvec = BsGetBits(groupMinLen);
- while (zvec >= groupLimits[zn])
- {
- if (++zn > BZip2Constants.MAX_CODE_LEN)
- throw new InvalidOperationException();
-
- zvec = (zvec << 1) | BsGetBit();
- }
- int permIndex = zvec - groupBase[zn];
- if (permIndex >= alphaSize)
- throw new InvalidOperationException();
-
- nextSym = groupPerm[permIndex];
- }
- continue;
- }
- }
-
- if (origPtr > last)
- throw new InvalidOperationException();
-
- // Check unzftab entries are in range.
- {
- int nblock = last + 1;
- int check = 0;
-
- for (i = 0; i <= 255; i++)
- {
- int t = unzftab[i];
- check |= t;
- check |= nblock - t;
- }
- if (check < 0)
- throw new InvalidOperationException();
- }
- }
-
- private int RequireByte()
- {
- int b = bsStream.ReadByte();
- if (b < 0)
- throw new EndOfStreamException();
- return b & 0xFF;
- }
-
- private void SetupRandPartA()
- {
- if (i2 <= last)
- {
- chPrev = ch2;
- ch2 = ll8[tPos];
- tPos = tt[tPos];
- if (rNToGo == 0)
- {
- rNToGo = CBZip2OutputStream.RNums[rTPos++];
- rTPos &= 0x1FF;
- }
- rNToGo--;
- ch2 ^= rNToGo == 1 ? 1 : 0;
- i2++;
-
- currentByte = ch2;
- currentState = RAND_PART_B_STATE;
- m_blockCrc.Update((byte)ch2);
- }
- else
- {
- EndBlock();
- BeginBlock();
- }
- }
-
- private void SetupNoRandPartA()
- {
- if (i2 <= last)
- {
- chPrev = ch2;
- ch2 = ll8[tPos];
- tPos = tt[tPos];
- i2++;
-
- currentByte = ch2;
- currentState = NO_RAND_PART_B_STATE;
- m_blockCrc.Update((byte)ch2);
- }
- else
- {
- EndBlock();
- BeginBlock();
- }
- }
-
- private void SetupRandPartB()
- {
- if (ch2 != chPrev)
- {
- count = 1;
- SetupRandPartA();
- }
- else if (++count < 4)
- {
- SetupRandPartA();
- }
- else
- {
- z = ll8[tPos];
- tPos = tt[tPos];
- if (rNToGo == 0)
- {
- rNToGo = CBZip2OutputStream.RNums[rTPos++];
- rTPos &= 0x1FF;
- }
- rNToGo--;
- z ^= rNToGo == 1 ? 1 : 0;
- j2 = 0;
- currentState = RAND_PART_C_STATE;
- SetupRandPartC();
- }
- }
-
- private void SetupNoRandPartB()
- {
- if (ch2 != chPrev)
- {
- count = 1;
- SetupNoRandPartA();
- }
- else if (++count < 4)
- {
- SetupNoRandPartA();
- }
- else
- {
- z = ll8[tPos];
- tPos = tt[tPos];
- currentState = NO_RAND_PART_C_STATE;
- j2 = 0;
- SetupNoRandPartC();
- }
- }
-
- private void SetupRandPartC()
- {
- if (j2 < z)
- {
- currentByte = ch2;
- m_blockCrc.Update((byte)ch2);
- j2++;
- }
- else
- {
- i2++;
- count = 0;
- SetupRandPartA();
- }
- }
-
- private void SetupNoRandPartC()
- {
- if (j2 < z)
- {
- currentByte = ch2;
- m_blockCrc.Update((byte)ch2);
- j2++;
- }
- else
- {
- i2++;
- count = 0;
- SetupNoRandPartA();
- }
- }
-
- internal static int[][] CreateIntArray(int n1, int n2)
- {
- int[][] a = new int[n1][];
- for (int k = 0; k < n1; ++k)
- {
- a[k] = new int[n2];
- }
- return a;
- }
- }
-}
diff --git a/crypto/bzip2/src/CBZip2OutputStream.cs b/crypto/bzip2/src/CBZip2OutputStream.cs
deleted file mode 100644
index 262a52f84..000000000
--- a/crypto/bzip2/src/CBZip2OutputStream.cs
+++ /dev/null
@@ -1,1608 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-/*
- * This package is based on the work done by Keiron Liddle, Aftex Software
- * <keiron@aftexsw.com> to whom the Ant project is very grateful for his
- * great code.
- */
-
-using System;
-using System.Collections;
-using System.Diagnostics;
-using System.IO;
-
-using Org.BouncyCastle.Utilities;
-using Org.BouncyCastle.Utilities.IO;
-
-namespace Org.BouncyCastle.Apache.Bzip2
-{
- /**
- * An output stream that compresses into the BZip2 format (with the file
- * header chars) into another stream.
- *
- * @author <a href="mailto:keiron@aftexsw.com">Keiron Liddle</a>
- *
- * TODO: Update to BZip2 1.0.1
- * <b>NB:</b> note this class has been modified to add a leading BZ to the
- * start of the BZIP2 stream to make it compatible with other PGP programs.
- */
- public class CBZip2OutputStream
- : BaseOutputStream
- {
- protected const int SETMASK = 1 << 21;
- protected const int CLEARMASK = ~SETMASK;
- protected const int GREATER_ICOST = 15;
- protected const int LESSER_ICOST = 0;
- protected const int SMALL_THRESH = 20;
- protected const int DEPTH_THRESH = 10;
-
- internal static readonly ushort[] RNums = {
- 619, 720, 127, 481, 931, 816, 813, 233, 566, 247, 985, 724, 205, 454, 863, 491, 741, 242, 949, 214, 733,
- 859, 335, 708, 621, 574, 73, 654, 730, 472, 419, 436, 278, 496, 867, 210, 399, 680, 480, 51, 878, 465, 811,
- 169, 869, 675, 611, 697, 867, 561, 862, 687, 507, 283, 482, 129, 807, 591, 733, 623, 150, 238, 59, 379, 684,
- 877, 625, 169, 643, 105, 170, 607, 520, 932, 727, 476, 693, 425, 174, 647, 73, 122, 335, 530, 442, 853, 695,
- 249, 445, 515, 909, 545, 703, 919, 874, 474, 882, 500, 594, 612, 641, 801, 220, 162, 819, 984, 589, 513,
- 495, 799, 161, 604, 958, 533, 221, 400, 386, 867, 600, 782, 382, 596, 414, 171, 516, 375, 682, 485, 911,
- 276, 98, 553, 163, 354, 666, 933, 424, 341, 533, 870, 227, 730, 475, 186, 263, 647, 537, 686, 600, 224, 469,
- 68, 770, 919, 190, 373, 294, 822, 808, 206, 184, 943, 795, 384, 383, 461, 404, 758, 839, 887, 715, 67, 618,
- 276, 204, 918, 873, 777, 604, 560, 951, 160, 578, 722, 79, 804, 96, 409, 713, 940, 652, 934, 970, 447, 318,
- 353, 859, 672, 112, 785, 645, 863, 803, 350, 139, 93, 354, 99, 820, 908, 609, 772, 154, 274, 580, 184, 79,
- 626, 630, 742, 653, 282, 762, 623, 680, 81, 927, 626, 789, 125, 411, 521, 938, 300, 821, 78, 343, 175, 128,
- 250, 170, 774, 972, 275, 999, 639, 495, 78, 352, 126, 857, 956, 358, 619, 580, 124, 737, 594, 701, 612, 669,
- 112, 134, 694, 363, 992, 809, 743, 168, 974, 944, 375, 748, 52, 600, 747, 642, 182, 862, 81, 344, 805, 988,
- 739, 511, 655, 814, 334, 249, 515, 897, 955, 664, 981, 649, 113, 974, 459, 893, 228, 433, 837, 553, 268,
- 926, 240, 102, 654, 459, 51, 686, 754, 806, 760, 493, 403, 415, 394, 687, 700, 946, 670, 656, 610, 738, 392,
- 760, 799, 887, 653, 978, 321, 576, 617, 626, 502, 894, 679, 243, 440, 680, 879, 194, 572, 640, 724, 926, 56,
- 204, 700, 707, 151, 457, 449, 797, 195, 791, 558, 945, 679, 297, 59, 87, 824, 713, 663, 412, 693, 342, 606,
- 134, 108, 571, 364, 631, 212, 174, 643, 304, 329, 343, 97, 430, 751, 497, 314, 983, 374, 822, 928, 140, 206,
- 73, 263, 980, 736, 876, 478, 430, 305, 170, 514, 364, 692, 829, 82, 855, 953, 676, 246, 369, 970, 294, 750,
- 807, 827, 150, 790, 288, 923, 804, 378, 215, 828, 592, 281, 565, 555, 710, 82, 896, 831, 547, 261, 524, 462,
- 293, 465, 502, 56, 661, 821, 976, 991, 658, 869, 905, 758, 745, 193, 768, 550, 608, 933, 378, 286, 215, 979,
- 792, 961, 61, 688, 793, 644, 986, 403, 106, 366, 905, 644, 372, 567, 466, 434, 645, 210, 389, 550, 919, 135,
- 780, 773, 635, 389, 707, 100, 626, 958, 165, 504, 920, 176, 193, 713, 857, 265, 203, 50, 668, 108, 645, 990,
- 626, 197, 510, 357, 358, 850, 858, 364, 936, 638 };
-
- /*
- * Knuth's increments seem to work better than Incerpi-Sedgewick here, possibly because the number of elements
- * to sort is usually small, typically <= 20.
- */
- private static readonly int[] Incs = { 1, 4, 13, 40, 121, 364, 1093, 3280, 9841, 29524, 88573, 265720, 797161,
- 2391484 };
-
- private bool finished;
-
- protected static void HbMakeCodeLengths(byte[] len, int[] freq, int alphaSize, int maxLen)
- {
- /*
- Nodes and heap entries run from 1. Entry 0
- for both the heap and nodes is a sentinel.
- */
- int[] heap = new int[BZip2Constants.MAX_ALPHA_SIZE + 2];
- int[] weight = new int[BZip2Constants.MAX_ALPHA_SIZE * 2];
- int[] parent = new int[BZip2Constants.MAX_ALPHA_SIZE * 2];
-
- for (int i = 0; i < alphaSize; i++)
- {
- weight[i + 1] = (freq[i] == 0 ? 1 : freq[i]) << 8;
- }
-
- while (true)
- {
- int nNodes = alphaSize;
- int nHeap = 0;
-
- heap[0] = 0;
- weight[0] = 0;
- parent[0] = -2;
-
- for (int i = 1; i <= alphaSize; i++)
- {
- parent[i] = -1;
- heap[++nHeap] = i;
- {
- int zz = nHeap;
- int tmp = heap[zz];
- while (weight[tmp] < weight[heap[zz >> 1]])
- {
- heap[zz] = heap[zz >> 1];
- zz >>= 1;
- }
- heap[zz] = tmp;
- }
- }
- if (!(nHeap < (BZip2Constants.MAX_ALPHA_SIZE + 2)))
- throw new InvalidOperationException();
-
- while (nHeap > 1)
- {
- int n1 = heap[1];
- heap[1] = heap[nHeap--];
- {
- int zz = 1;
- int tmp = heap[zz];
- while (true)
- {
- int yy = zz << 1;
- if (yy > nHeap)
- break;
-
- if (yy < nHeap
- && weight[heap[yy + 1]] < weight[heap[yy]])
- {
- yy++;
- }
-
- if (weight[tmp] < weight[heap[yy]])
- break;
-
- heap[zz] = heap[yy];
- zz = yy;
- }
- heap[zz] = tmp;
- }
- int n2 = heap[1];
- heap[1] = heap[nHeap--];
- {
- int zz = 1;
- int tmp = heap[zz];
- while (true)
- {
- int yy = zz << 1;
- if (yy > nHeap)
- break;
-
- if (yy < nHeap
- && weight[heap[yy + 1]] < weight[heap[yy]])
- {
- yy++;
- }
-
- if (weight[tmp] < weight[heap[yy]])
- break;
-
- heap[zz] = heap[yy];
- zz = yy;
- }
- heap[zz] = tmp;
- }
- nNodes++;
- parent[n1] = parent[n2] = nNodes;
-
- weight[nNodes] = (int)((uint)((weight[n1] & 0xffffff00)
- + (weight[n2] & 0xffffff00))
- | (uint)(1 + (((weight[n1] & 0x000000ff) >
- (weight[n2] & 0x000000ff)) ?
- (weight[n1] & 0x000000ff) :
- (weight[n2] & 0x000000ff))));
-
- parent[nNodes] = -1;
- heap[++nHeap] = nNodes;
- {
- int zz = nHeap;
- int tmp = heap[zz];
- while (weight[tmp] < weight[heap[zz >> 1]])
- {
- heap[zz] = heap[zz >> 1];
- zz >>= 1;
- }
- heap[zz] = tmp;
- }
- }
- if (!(nNodes < (BZip2Constants.MAX_ALPHA_SIZE * 2)))
- throw new InvalidOperationException();
-
- //bool tooLong = false;
- int tooLongBits = 0;
- for (int i = 1; i <= alphaSize; i++)
- {
- int j = 0;
- int k = i;
- while (parent[k] >= 0)
- {
- k = parent[k];
- j++;
- }
- len[i - 1] = (byte)j;
- //tooLong |= j > maxLen;
- tooLongBits |= maxLen - j;
- }
-
- //if (!tooLong)
- if (tooLongBits >= 0)
- break;
-
- for (int i = 1; i <= alphaSize; i++)
- {
- int j = weight[i] >> 8;
- j = 1 + (j / 2);
- weight[i] = j << 8;
- }
- }
- }
-
- /*
- * number of characters in the block
- */
- int count;
-
- /*
- index in zptr[] of original string after sorting.
- */
- int origPtr;
-
- /*
- always: in the range 0 .. 9.
- The current block size is 100000 * this number.
- */
- private readonly int blockSize100k;
- private readonly int allowableBlockSize;
-
- bool blockRandomised;
- private readonly IList blocksortStack = Platform.CreateArrayList();
-
- int bsBuff;
- int bsLivePos;
- private readonly CRC m_blockCrc = new CRC();
-
- private bool[] inUse = new bool[256];
- private int nInUse;
-
- private byte[] m_selectors = new byte[BZip2Constants.MAX_SELECTORS];
-
- private byte[] blockBytes;
- private ushort[] quadrantShorts;
- private int[] zptr;
- private int[] szptr;
- private int[] ftab;
-
- private int nMTF;
-
- private int[] mtfFreq = new int[BZip2Constants.MAX_ALPHA_SIZE];
-
- /*
- * Used when sorting. If too many long comparisons
- * happen, we stop sorting, randomise the block
- * slightly, and try again.
- */
- private int workFactor;
- private int workDone;
- private int workLimit;
- private bool firstAttempt;
-
- private int currentByte = -1;
- private int runLength = 0;
- private int m_streamCrc;
-
- public CBZip2OutputStream(Stream outStream)
- : this(outStream, 9)
- {
- }
-
- public CBZip2OutputStream(Stream outStream, int blockSize)
- {
- blockBytes = null;
- quadrantShorts = null;
- zptr = null;
- ftab = null;
-
- outStream.WriteByte((byte)'B');
- outStream.WriteByte((byte)'Z');
-
- bsStream = outStream;
- bsBuff = 0;
- bsLivePos = 32;
-
- workFactor = 50;
- if (blockSize > 9)
- {
- blockSize = 9;
- }
- else if (blockSize < 1)
- {
- blockSize = 1;
- }
- blockSize100k = blockSize;
-
- /* 20 is just a paranoia constant */
- allowableBlockSize = BZip2Constants.baseBlockSize * blockSize100k - 20;
-
- int n = BZip2Constants.baseBlockSize * blockSize100k;
- blockBytes = new byte[(n + 1 + BZip2Constants.NUM_OVERSHOOT_BYTES)];
- quadrantShorts = new ushort[(n + 1 + BZip2Constants.NUM_OVERSHOOT_BYTES)];
- zptr = new int[n];
- ftab = new int[65537];
-
- /*
- The back end needs a place to store the MTF values
- whilst it calculates the coding tables. We could
- put them in the zptr array. However, these values
- will fit in a short, so we overlay szptr at the
- start of zptr, in the hope of reducing the number
- of cache misses induced by the multiple traversals
- of the MTF values when calculating coding tables.
- Seems to improve compression speed by about 1%.
- */
- // NOTE: We can't "overlay" in C#, so we just share zptr
- szptr = zptr;
-
- // Write `magic' bytes h indicating file-format == huffmanised, followed by a digit indicating blockSize100k
- outStream.WriteByte((byte)'h');
- outStream.WriteByte((byte)('0' + blockSize100k));
-
- m_streamCrc = 0;
-
- InitBlock();
- }
-
- /**
- *
- * modified by Oliver Merkel, 010128
- *
- */
- public override void WriteByte(byte value)
- {
- if (currentByte == value)
- {
- if (++runLength > 254)
- {
- WriteRun();
- currentByte = -1;
- runLength = 0;
- }
- return;
- }
-
- if (currentByte >= 0)
- {
- WriteRun();
- }
-
- currentByte = value;
- runLength = 1;
- }
-
- private void WriteRun()
- {
- if (count > allowableBlockSize)
- {
- EndBlock();
- InitBlock();
- }
-
- inUse[currentByte] = true;
-
- switch (runLength)
- {
- case 1:
- blockBytes[++count] = (byte)currentByte;
- m_blockCrc.Update((byte)currentByte);
- break;
- case 2:
- blockBytes[++count] = (byte)currentByte;
- blockBytes[++count] = (byte)currentByte;
- m_blockCrc.Update((byte)currentByte);
- m_blockCrc.Update((byte)currentByte);
- break;
- case 3:
- blockBytes[++count] = (byte)currentByte;
- blockBytes[++count] = (byte)currentByte;
- blockBytes[++count] = (byte)currentByte;
- m_blockCrc.Update((byte)currentByte);
- m_blockCrc.Update((byte)currentByte);
- m_blockCrc.Update((byte)currentByte);
- break;
- default:
- blockBytes[++count] = (byte)currentByte;
- blockBytes[++count] = (byte)currentByte;
- blockBytes[++count] = (byte)currentByte;
- blockBytes[++count] = (byte)currentByte;
- blockBytes[++count] = (byte)(runLength - 4);
- inUse[runLength - 4] = true;
- m_blockCrc.UpdateRun((byte)currentByte, runLength);
- break;
- }
- }
-
- bool closed = false;
-
-// protected void Finalize()
-// {
-// Close();
-// }
-
-#if PORTABLE
- protected override void Dispose(bool disposing)
- {
- if (disposing)
- {
- if (closed)
- return;
-
- Finish();
- closed = true;
- Platform.Dispose(this.bsStream);
- }
- base.Dispose(disposing);
- }
-#else
- public override void Close()
- {
- if (closed)
- return;
-
- Finish();
-
- closed = true;
- Platform.Dispose(this.bsStream);
-
- base.Close();
- }
-#endif
-
- public void Finish()
- {
- if (finished)
- return;
-
- if (runLength > 0)
- {
- WriteRun();
- }
- currentByte = -1;
- if (count > 0)
- {
- EndBlock();
- }
- EndCompression();
- finished = true;
- Flush();
- }
-
- public override void Flush()
- {
- bsStream.Flush();
- }
-
- private void InitBlock()
- {
- m_blockCrc.Initialise();
- count = 0;
-
- for (int i = 0; i < 256; i++)
- {
- inUse[i] = false;
- }
- }
-
- private void EndBlock()
- {
- int blockFinalCrc = m_blockCrc.GetFinal();
- m_streamCrc = Integers.RotateLeft(m_streamCrc, 1) ^ blockFinalCrc;
-
- /* sort the block and establish posn of original string */
- DoReversibleTransformation();
-
- /*
- A 6-byte block header, the value chosen arbitrarily
- as 0x314159265359 :-). A 32 bit value does not really
- give a strong enough guarantee that the value will not
- appear by chance in the compressed datastream. Worst-case
- probability of this event, for a 900k block, is about
- 2.0e-3 for 32 bits, 1.0e-5 for 40 bits and 4.0e-8 for 48 bits.
- For a compressed file of size 100Gb -- about 100000 blocks --
- only a 48-bit marker will do. NB: normal compression/
- decompression do *not* rely on these statistical properties.
- They are only important when trying to recover blocks from
- damaged files.
- */
- BsPutLong48(0x314159265359L);
-
- /* Now the block's CRC, so it is in a known place. */
- BsPutInt32(blockFinalCrc);
-
- /* Now a single bit indicating randomisation. */
- BsPutBit(blockRandomised ? 1 : 0);
-
- /* Finally, block's contents proper. */
- MoveToFrontCodeAndSend();
- }
-
- private void EndCompression()
- {
- /*
- Now another magic 48-bit number, 0x177245385090, to
- indicate the end of the last block. (Sqrt(pi), if
- you want to know. I did want to use e, but it contains
- too much repetition -- 27 18 28 18 28 46 -- for me
- to feel statistically comfortable. Call me paranoid.)
- */
- BsPutLong48(0x177245385090L);
-
- BsPutInt32(m_streamCrc);
-
- BsFinishedWithStream();
- }
-
- private void HbAssignCodes(int[] code, byte[] length, int minLen, int maxLen, int alphaSize)
- {
- int vec = 0;
- for (int n = minLen; n <= maxLen; n++)
- {
- for (int i = 0; i < alphaSize; i++)
- {
- if (length[i] == n)
- {
- code[i] = vec++;
- }
- }
- vec <<= 1;
- }
- }
-
- private void BsFinishedWithStream()
- {
- if (bsLivePos < 32)
- {
- bsStream.WriteByte((byte)(bsBuff >> 24));
- bsBuff = 0;
- bsLivePos = 32;
- }
- }
-
- private void BsPutBit(int v)
- {
- --bsLivePos;
- bsBuff |= v << bsLivePos;
-
- if (bsLivePos <= 24)
- {
- bsStream.WriteByte((byte)(bsBuff >> 24));
- bsBuff <<= 8;
- bsLivePos += 8;
- }
- }
-
- private void BsPutBits(int n, int v)
- {
- Debug.Assert(1 <= n && n <= 24);
-
- bsLivePos -= n;
- bsBuff |= v << bsLivePos;
-
- while (bsLivePos <= 24)
- {
- bsStream.WriteByte((byte)(bsBuff >> 24));
- bsBuff <<= 8;
- bsLivePos += 8;
- }
- }
-
- private void BsPutBitsSmall(int n, int v)
- {
- Debug.Assert(1 <= n && n <= 8);
-
- bsLivePos -= n;
- bsBuff |= v << bsLivePos;
-
- if (bsLivePos <= 24)
- {
- bsStream.WriteByte((byte)(bsBuff >> 24));
- bsBuff <<= 8;
- bsLivePos += 8;
- }
- }
-
- private void BsPutInt32(int u)
- {
- BsPutBits(16, (u >> 16) & 0xFFFF);
- BsPutBits(16, u & 0xFFFF);
- }
-
- private void BsPutLong48(long u)
- {
- BsPutBits(24, (int)(u >> 24) & 0xFFFFFF);
- BsPutBits(24, (int)u & 0xFFFFFF);
- }
-
- private void SendMtfValues()
- {
-
- int v, t, i, j, bt, bc, iter;
-
- int alphaSize = nInUse + 2;
-
- /* Decide how many coding tables to use */
- if (nMTF <= 0)
- throw new InvalidOperationException();
-
- int nGroups;
- if (nMTF < 200)
- {
- nGroups = 2;
- }
- else if (nMTF < 600)
- {
- nGroups = 3;
- }
- else if (nMTF < 1200)
- {
- nGroups = 4;
- }
- else if (nMTF < 2400)
- {
- nGroups = 5;
- }
- else
- {
- nGroups = 6;
- }
-
- byte[][] len = CreateByteArray(nGroups, alphaSize);
- for (t = 0; t < nGroups; t++)
- {
- Arrays.Fill(len[t], GREATER_ICOST);
- }
-
- /* Generate an initial set of coding tables */
- {
- int nPart = nGroups;
- int remF = nMTF;
- int ge = -1;
- while (nPart > 0)
- {
- int gs = ge + 1;
- int aFreq = 0, tFreq = remF / nPart;
- while (aFreq < tFreq && ge < alphaSize - 1)
- {
- aFreq += mtfFreq[++ge];
- }
-
- if (ge > gs && nPart != nGroups && nPart != 1
- && ((nGroups - nPart) % 2 == 1))
- {
- aFreq -= mtfFreq[ge--];
- }
-
- byte[] len_np = len[nPart - 1];
- for (v = 0; v < alphaSize; v++)
- {
- if (v >= gs && v <= ge)
- {
- len_np[v] = LESSER_ICOST;
- }
- else
- {
- len_np[v] = GREATER_ICOST;
- }
- }
-
- nPart--;
- remF -= aFreq;
- }
- }
-
- int[][] rfreq = CBZip2InputStream.CreateIntArray(BZip2Constants.N_GROUPS, BZip2Constants.MAX_ALPHA_SIZE);
- int[] fave = new int[BZip2Constants.N_GROUPS];
- short[] cost = new short[BZip2Constants.N_GROUPS];
-
- // Iterate up to N_ITERS times to improve the tables.
- int nSelectors = 0;
- for (iter = 0; iter < BZip2Constants.N_ITERS; iter++)
- {
- for (t = 0; t < nGroups; t++)
- {
- fave[t] = 0;
-
- int[] rfreq_t = rfreq[t];
- for (v = 0; v < alphaSize; v++)
- {
- rfreq_t[v] = 0;
- }
- }
-
- nSelectors = 0;
- int gs = 0;
- while (gs < nMTF)
- {
- /* Set group start & end marks. */
-
- /*
- * Calculate the cost of this group as coded by each of the coding tables.
- */
-
- int ge = System.Math.Min(gs + BZip2Constants.G_SIZE - 1, nMTF - 1);
-
- if (nGroups == 6)
- {
- byte[] len_0 = len[0], len_1 = len[1], len_2 = len[2], len_3 = len[3], len_4 = len[4], len_5 = len[5];
- short cost0 = 0, cost1 = 0, cost2 = 0, cost3 = 0, cost4 = 0, cost5 = 0;
-
- for (i = gs; i <= ge; i++)
- {
- int icv = szptr[i];
- cost0 += len_0[icv];
- cost1 += len_1[icv];
- cost2 += len_2[icv];
- cost3 += len_3[icv];
- cost4 += len_4[icv];
- cost5 += len_5[icv];
- }
-
- cost[0] = cost0;
- cost[1] = cost1;
- cost[2] = cost2;
- cost[3] = cost3;
- cost[4] = cost4;
- cost[5] = cost5;
- }
- else
- {
- for (t = 0; t < nGroups; t++)
- {
- cost[t] = 0;
- }
-
- for (i = gs; i <= ge; i++)
- {
- int icv = szptr[i];
- for (t = 0; t < nGroups; t++)
- {
- cost[t] += len[t][icv];
- }
- }
- }
-
- /*
- Find the coding table which is best for this group,
- and record its identity in the selector table.
- */
- bc = cost[0];
- bt = 0;
- for (t = 1; t < nGroups; t++)
- {
- short cost_t = cost[t];
- if (cost_t < bc)
- {
- bc = cost_t;
- bt = t;
- }
- }
- fave[bt]++;
- m_selectors[nSelectors] = (byte)bt;
- nSelectors++;
-
- /*
- Increment the symbol frequencies for the selected table.
- */
- int[] rfreq_bt = rfreq[bt];
- for (i = gs; i <= ge; i++)
- {
- rfreq_bt[szptr[i]]++;
- }
-
- gs = ge + 1;
- }
-
- /*
- Recompute the tables based on the accumulated frequencies.
- */
- for (t = 0; t < nGroups; t++)
- {
- HbMakeCodeLengths(len[t], rfreq[t], alphaSize, BZip2Constants.MAX_CODE_LEN_GEN);
- }
- }
-
- if (nGroups >= 8 || nGroups > BZip2Constants.N_GROUPS)
- throw new InvalidOperationException();
- if (nSelectors >= 32768 || nSelectors > BZip2Constants.MAX_SELECTORS)
- throw new InvalidOperationException();
-
- int[][] code = CBZip2InputStream.CreateIntArray(BZip2Constants.N_GROUPS, BZip2Constants.MAX_ALPHA_SIZE);
-
- /* Assign actual codes for the tables. */
- for (t = 0; t < nGroups; t++)
- {
- int maxLen = 0, minLen = 32;
- byte[] len_t = len[t];
- for (i = 0; i < alphaSize; i++)
- {
- int lti = len_t[i];
- maxLen = System.Math.Max(maxLen, lti);
- minLen = System.Math.Min(minLen, lti);
- }
- if (minLen < 1 | maxLen > BZip2Constants.MAX_CODE_LEN_GEN)
- throw new InvalidOperationException();
-
- HbAssignCodes(code[t], len_t, minLen, maxLen, alphaSize);
- }
-
- /* Transmit the mapping table. */
- {
- bool[] inUse16 = new bool[16];
- for (i = 0; i < 16; i++)
- {
- inUse16[i] = false;
- int i16 = i * 16;
- for (j = 0; j < 16; j++)
- {
- if (inUse[i16 + j])
- {
- inUse16[i] = true;
- break;
- }
- }
- }
-
- for (i = 0; i < 16; i++)
- {
- BsPutBit(inUse16[i] ? 1 : 0);
- }
-
- for (i = 0; i < 16; i++)
- {
- if (inUse16[i])
- {
- int i16 = i * 16;
- for (j = 0; j < 16; j++)
- {
- BsPutBit(inUse[i16 + j] ? 1 : 0);
- }
- }
- }
- }
-
- /* Now the selectors. */
- BsPutBitsSmall(3, nGroups);
- BsPutBits(15, nSelectors);
- {
- int mtfSelectors = 0x00654321;
-
- for (i = 0; i < nSelectors; i++)
- {
- // Compute MTF value for the selector.
- int ll_i = m_selectors[i];
- int bitPos = ll_i << 2;
- int mtfSelector = (mtfSelectors >> bitPos) & 0xF;
-
- if (mtfSelector != 1)
- {
- int mtfIncMask = (0x00888888 - mtfSelectors + 0x00111111 * mtfSelector) & 0x00888888;
- mtfSelectors = mtfSelectors - (mtfSelector << bitPos) + (mtfIncMask >> 3);
- }
-
- BsPutBitsSmall(mtfSelector, (1 << mtfSelector) - 2);
- }
- }
-
- /* Now the coding tables. */
- for (t = 0; t < nGroups; t++)
- {
- byte[] len_t = len[t];
- int curr = len_t[0];
- BsPutBitsSmall(6, curr << 1);
- for (i = 1; i < alphaSize; i++)
- {
- int lti = len_t[i];
- while (curr < lti)
- {
- BsPutBitsSmall(2, 2);
- curr++; /* 10 */
- }
- while (curr > lti)
- {
- BsPutBitsSmall(2, 3);
- curr--; /* 11 */
- }
- BsPutBit(0);
- }
- }
-
- /* And finally, the block data proper */
- {
- int selCtr = 0;
- int gs = 0;
- while (gs < nMTF)
- {
- int ge = System.Math.Min(gs + BZip2Constants.G_SIZE - 1, nMTF - 1);
-
- int selector_selCtr = m_selectors[selCtr];
- byte[] len_selCtr = len[selector_selCtr];
- int[] code_selCtr = code[selector_selCtr];
-
- for (i = gs; i <= ge; i++)
- {
- int sfmap_i = szptr[i];
- BsPutBits(len_selCtr[sfmap_i], code_selCtr[sfmap_i]);
- }
-
- gs = ge + 1;
- selCtr++;
- }
- if (selCtr != nSelectors)
- throw new InvalidOperationException();
- }
- }
-
- private void MoveToFrontCodeAndSend()
- {
- BsPutBits(24, origPtr);
- GenerateMtfValues();
- SendMtfValues();
- }
-
- private Stream bsStream;
-
- private void SimpleSort(int lo, int hi, int d)
- {
- int i, j, h, v;
-
- int bigN = hi - lo + 1;
- if (bigN < 2)
- return;
-
- int hp = 0;
- while (Incs[hp] < bigN)
- {
- hp++;
- }
- hp--;
-
- for (; hp >= 0; hp--)
- {
- h = Incs[hp];
-
- i = lo + h;
- while (i <= hi)
- {
- /* copy 1 */
- v = zptr[i];
- j = i;
- while (FullGtU(zptr[j - h] + d, v + d))
- {
- zptr[j] = zptr[j - h];
- j = j - h;
- if (j <= (lo + h - 1))
- break;
- }
- zptr[j] = v;
-
- /* copy 2 */
- if (++i > hi)
- break;
-
- v = zptr[i];
- j = i;
- while (FullGtU(zptr[j - h] + d, v + d))
- {
- zptr[j] = zptr[j - h];
- j = j - h;
- if (j <= (lo + h - 1))
- break;
- }
- zptr[j] = v;
-
- /* copy 3 */
- if (++i > hi)
- break;
-
- v = zptr[i];
- j = i;
- while (FullGtU(zptr[j - h] + d, v + d))
- {
- zptr[j] = zptr[j - h];
- j = j - h;
- if (j <= (lo + h - 1))
- break;
- }
- zptr[j] = v;
- i++;
-
- if (workDone > workLimit && firstAttempt)
- return;
- }
- }
- }
-
- private void Vswap(int p1, int p2, int n)
- {
- while (--n >= 0)
- {
- int t1 = zptr[p1], t2 = zptr[p2];
- zptr[p1++] = t2;
- zptr[p2++] = t1;
- }
- }
-
- private int Med3(int a, int b, int c)
- {
- return a > b
- ? (c < b ? b : c > a ? a : c)
- : (c < a ? a : c > b ? b : c);
- }
-
- internal class StackElem
- {
- internal int ll;
- internal int hh;
- internal int dd;
- }
-
- private static void PushStackElem(IList stack, int stackCount, int ll, int hh, int dd)
- {
- StackElem stackElem;
- if (stackCount < stack.Count)
- {
- stackElem = (StackElem)stack[stackCount];
- }
- else
- {
- stackElem = new StackElem();
- stack.Add(stackElem);
- }
-
- stackElem.ll = ll;
- stackElem.hh = hh;
- stackElem.dd = dd;
- }
-
- private void QSort3(int loSt, int hiSt, int dSt)
- {
- int unLo, unHi, ltLo, gtHi, n, m;
-
- IList stack = blocksortStack;
- int stackCount = 0;
- StackElem stackElem;
-
- int lo = loSt;
- int hi = hiSt;
- int d = dSt;
-
- for (;;)
- {
- if (hi - lo < SMALL_THRESH || d > DEPTH_THRESH)
- {
- SimpleSort(lo, hi, d);
- if (stackCount < 1 || (workDone > workLimit && firstAttempt))
- return;
-
- stackElem = (StackElem)stack[--stackCount];
- lo = stackElem.ll;
- hi = stackElem.hh;
- d = stackElem.dd;
- continue;
- }
-
- int d1 = d + 1;
- int med = Med3(
- blockBytes[zptr[lo] + d1],
- blockBytes[zptr[hi] + d1],
- blockBytes[zptr[(lo + hi) >> 1] + d1]);
-
- unLo = ltLo = lo;
- unHi = gtHi = hi;
-
- while (true)
- {
- while (unLo <= unHi)
- {
- int zUnLo = zptr[unLo];
- n = blockBytes[zUnLo + d1] - med;
- if (n > 0)
- break;
-
- if (n == 0)
- {
- zptr[unLo] = zptr[ltLo];
- zptr[ltLo++] = zUnLo;
- }
- unLo++;
- }
- while (unLo <= unHi)
- {
- int zUnHi = zptr[unHi];
- n = blockBytes[zUnHi + d1] - med;
- if (n < 0)
- break;
-
- if (n == 0)
- {
- zptr[unHi] = zptr[gtHi];
- zptr[gtHi--] = zUnHi;
- }
- unHi--;
- }
- if (unLo > unHi)
- break;
-
- int temp = zptr[unLo];
- zptr[unLo++] = zptr[unHi];
- zptr[unHi--] = temp;
- }
-
- if (gtHi < ltLo)
- {
- d = d1;
- continue;
- }
-
- n = System.Math.Min(ltLo - lo, unLo - ltLo);
- Vswap(lo, unLo - n, n);
-
- m = System.Math.Min(hi - gtHi, gtHi - unHi);
- Vswap(unLo, hi - m + 1, m);
-
- n = lo + (unLo - ltLo);
- m = hi - (gtHi - unHi);
-
- PushStackElem(stack, stackCount++, lo, n - 1, d);
- PushStackElem(stack, stackCount++, n, m, d1);
-
- lo = m + 1;
- }
- }
-
- private void MainSort()
- {
- int i, j, ss, sb;
- int[] runningOrder = new int[256];
- int[] copy = new int[256];
- bool[] bigDone = new bool[256];
- int c1, c2;
-
- /*
- In the various block-sized structures, live data runs
- from 0 to last+NUM_OVERSHOOT_BYTES inclusive. First,
- set up the overshoot area for block.
- */
- for (i = 0; i < BZip2Constants.NUM_OVERSHOOT_BYTES; i++)
- {
- blockBytes[count + i + 1] = blockBytes[(i % count) + 1];
- }
- for (i = 0; i <= count + BZip2Constants.NUM_OVERSHOOT_BYTES; i++)
- {
- quadrantShorts[i] = 0;
- }
-
- blockBytes[0] = blockBytes[count];
-
- if (count <= 4000)
- {
- /*
- Use SimpleSort(), since the full sorting mechanism
- has quite a large constant overhead.
- */
- for (i = 0; i < count; i++)
- {
- zptr[i] = i;
- }
- firstAttempt = false;
- workDone = workLimit = 0;
- SimpleSort(0, count - 1, 0);
- }
- else
- {
- for (i = 0; i <= 255; i++)
- {
- bigDone[i] = false;
- }
-
- for (i = 0; i <= 65536; i++)
- {
- ftab[i] = 0;
- }
-
- c1 = blockBytes[0];
- for (i = 1; i <= count; i++)
- {
- c2 = blockBytes[i];
- ftab[(c1 << 8) + c2]++;
- c1 = c2;
- }
-
- for (i = 0; i < 65536; i++)
- {
- ftab[i + 1] += ftab[i];
- }
-
- c1 = blockBytes[1];
- for (i = 0; i < (count - 1); i++)
- {
- c2 = blockBytes[i + 2];
- j = (c1 << 8) + c2;
- c1 = c2;
- ftab[j]--;
- zptr[ftab[j]] = i;
- }
-
- j = ((int)blockBytes[count] << 8) + blockBytes[1];
- ftab[j]--;
- zptr[ftab[j]] = count - 1;
-
- /*
- Now ftab contains the first loc of every small bucket.
- Calculate the running order, from smallest to largest
- big bucket.
- */
-
- for (i = 0; i <= 255; i++)
- {
- runningOrder[i] = i;
- }
-
- {
- int h = 1;
- do
- {
- h = 3 * h + 1;
- }
- while (h <= 256);
- do
- {
- h = h / 3;
- for (i = h; i <= 255; i++)
- {
- int vv = runningOrder[i];
- j = i;
- while ((ftab[(runningOrder[j - h] + 1) << 8] - ftab[runningOrder[j - h] << 8])
- > (ftab[(vv + 1) << 8] - ftab[vv << 8]))
- {
- runningOrder[j] = runningOrder[j - h];
- j = j - h;
- if (j < h)
- break;
- }
- runningOrder[j] = vv;
- }
- }
- while (h != 1);
- }
-
- /*
- The main sorting loop.
- */
- for (i = 0; i <= 255; i++)
- {
- /*
- Process big buckets, starting with the least full.
- */
- ss = runningOrder[i];
-
- /*
- Complete the big bucket [ss] by quicksorting
- any unsorted small buckets [ss, j]. Hopefully
- previous pointer-scanning phases have already
- completed many of the small buckets [ss, j], so
- we don't have to sort them at all.
- */
- for (j = 0; j <= 255; j++)
- {
- sb = (ss << 8) + j;
- if ((ftab[sb] & SETMASK) != SETMASK)
- {
- int lo = ftab[sb] & CLEARMASK;
- int hi = (ftab[sb + 1] & CLEARMASK) - 1;
- if (hi > lo)
- {
- QSort3(lo, hi, 2);
- if (workDone > workLimit && firstAttempt)
- return;
- }
- ftab[sb] |= SETMASK;
- }
- }
-
- /*
- The ss big bucket is now done. Record this fact,
- and update the quadrant descriptors. Remember to
- update quadrants in the overshoot area too, if
- necessary. The "if (i < 255)" test merely skips
- this updating for the last bucket processed, since
- updating for the last bucket is pointless.
- */
- bigDone[ss] = true;
-
- if (i < 255)
- {
- int bbStart = ftab[ss << 8] & CLEARMASK;
- int bbSize = (ftab[(ss + 1) << 8] & CLEARMASK) - bbStart;
-
- int shifts = 0;
- while ((bbSize >> shifts) > 65534)
- {
- shifts++;
- }
-
- for (j = 0; j < bbSize; j++)
- {
- int a2update = zptr[bbStart + j] + 1;
- ushort qVal = (ushort)(j >> shifts);
- quadrantShorts[a2update] = qVal;
- if (a2update <= BZip2Constants.NUM_OVERSHOOT_BYTES)
- {
- quadrantShorts[a2update + count] = qVal;
- }
- }
-
- if (!(((bbSize - 1) >> shifts) <= 65535))
- throw new InvalidOperationException();
- }
-
- /*
- Now scan this big bucket so as to synthesise the
- sorted order for small buckets [t, ss] for all t != ss.
- */
- for (j = 0; j <= 255; j++)
- {
- copy[j] = ftab[(j << 8) + ss] & CLEARMASK;
- }
-
- for (j = ftab[ss << 8] & CLEARMASK;
- j < (ftab[(ss + 1) << 8] & CLEARMASK); j++)
- {
- int zptr_j = zptr[j];
- c1 = blockBytes[zptr_j];
- if (!bigDone[c1])
- {
- zptr[copy[c1]] = (zptr_j == 0 ? count : zptr_j) - 1;
- copy[c1]++;
- }
- }
-
- for (j = 0; j <= 255; j++)
- {
- ftab[(j << 8) + ss] |= SETMASK;
- }
- }
- }
- }
-
- private void RandomiseBlock()
- {
- for (int i = 0; i < 256; i++)
- {
- inUse[i] = false;
- }
-
- int rNToGo = 0, rTPos = 0;
-
- for (int i = 1; i <= count; i++)
- {
- if (rNToGo == 0)
- {
- rNToGo = RNums[rTPos++];
- rTPos &= 0x1FF;
- }
- rNToGo--;
- blockBytes[i] ^= (byte)(rNToGo == 1 ? 1 : 0);
-
- inUse[blockBytes[i]] = true;
- }
- }
-
- private void DoReversibleTransformation()
- {
- workLimit = workFactor * (count - 1);
- workDone = 0;
- blockRandomised = false;
- firstAttempt = true;
-
- MainSort();
-
- if (workDone > workLimit && firstAttempt)
- {
- RandomiseBlock();
- workLimit = workDone = 0;
- blockRandomised = true;
- firstAttempt = false;
- MainSort();
- }
-
- origPtr = -1;
- for (int i = 0; i < count; i++)
- {
- if (zptr[i] == 0)
- {
- origPtr = i;
- break;
- }
- }
-
- if (origPtr == -1)
- throw new InvalidOperationException();
- }
-
- private bool FullGtU(int i1, int i2)
- {
- int c1, c2;
-
- c1 = blockBytes[++i1];
- c2 = blockBytes[++i2];
- if (c1 != c2)
- return c1 > c2;
-
- c1 = blockBytes[++i1];
- c2 = blockBytes[++i2];
- if (c1 != c2)
- return c1 > c2;
-
- c1 = blockBytes[++i1];
- c2 = blockBytes[++i2];
- if (c1 != c2)
- return c1 > c2;
-
- c1 = blockBytes[++i1];
- c2 = blockBytes[++i2];
- if (c1 != c2)
- return c1 > c2;
-
- c1 = blockBytes[++i1];
- c2 = blockBytes[++i2];
- if (c1 != c2)
- return c1 > c2;
-
- c1 = blockBytes[++i1];
- c2 = blockBytes[++i2];
- if (c1 != c2)
- return c1 > c2;
-
- int k = count;
- int s1, s2;
-
- do
- {
- c1 = blockBytes[++i1];
- c2 = blockBytes[++i2];
- if (c1 != c2)
- return c1 > c2;
-
- s1 = quadrantShorts[i1];
- s2 = quadrantShorts[i2];
- if (s1 != s2)
- return s1 > s2;
-
- c1 = blockBytes[++i1];
- c2 = blockBytes[++i2];
- if (c1 != c2)
- return c1 > c2;
-
- s1 = quadrantShorts[i1];
- s2 = quadrantShorts[i2];
- if (s1 != s2)
- return s1 > s2;
-
- c1 = blockBytes[++i1];
- c2 = blockBytes[++i2];
- if (c1 != c2)
- return c1 > c2;
-
- s1 = quadrantShorts[i1];
- s2 = quadrantShorts[i2];
- if (s1 != s2)
- return s1 > s2;
-
- c1 = blockBytes[++i1];
- c2 = blockBytes[++i2];
- if (c1 != c2)
- return c1 > c2;
-
- s1 = quadrantShorts[i1];
- s2 = quadrantShorts[i2];
- if (s1 != s2)
- return s1 > s2;
-
- if (i1 >= count)
- {
- i1 -= count;
- }
- if (i2 >= count)
- {
- i2 -= count;
- }
-
- k -= 4;
- workDone++;
- }
- while (k >= 0);
-
- return false;
- }
-
- private void GenerateMtfValues()
- {
- int i;
-
- nInUse = 0;
-
- byte[] yy = new byte[256];
- for (i = 0; i < 256; i++)
- {
- if (inUse[i])
- {
- yy[nInUse++] = (byte)i;
- }
- }
-
- int EOB = nInUse + 1;
-
- for (i = 0; i <= EOB; i++)
- {
- mtfFreq[i] = 0;
- }
-
- int j, wr = 0, zPend = 0;
- for (i = 0; i < count; i++)
- {
- byte blockByte = blockBytes[zptr[i]];
-
- byte tmp = yy[0];
- if (blockByte == tmp)
- {
- zPend++;
- continue;
- }
-
- int sym = 1;
- do
- {
- byte tmp2 = tmp;
- tmp = yy[sym];
- yy[sym++] = tmp2;
- }
- while (blockByte != tmp);
- yy[0] = tmp;
-
- while (zPend > 0)
- {
- // RUNA or RUNB
- int run = --zPend & 1;
- szptr[wr++] = run;
- mtfFreq[run]++;
- zPend >>= 1;
- }
-
- szptr[wr++] = sym;
- mtfFreq[sym]++;
- }
-
- while (zPend > 0)
- {
- // RUNA or RUNB
- int run = --zPend & 1;
- szptr[wr++] = run;
- mtfFreq[run]++;
- zPend >>= 1;
- }
-
- szptr[wr++] = EOB;
- mtfFreq[EOB]++;
-
- nMTF = wr;
- }
-
- internal static byte[][] CreateByteArray(int n1, int n2)
- {
- byte[][] a = new byte[n1][];
- for (int k = 0; k < n1; ++k)
- {
- a[k] = new byte[n2];
- }
- return a;
- }
- }
-}
diff --git a/crypto/bzip2/src/CRC.cs b/crypto/bzip2/src/CRC.cs
deleted file mode 100644
index a66340e22..000000000
--- a/crypto/bzip2/src/CRC.cs
+++ /dev/null
@@ -1,161 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-/*
- * This package is based on the work done by Keiron Liddle), Aftex Software
- * <keiron@aftexsw.com> to whom the Ant project is very grateful for his
- * great code.
- */
-
-using System;
-using System.Diagnostics;
-
-using Org.BouncyCastle.Utilities;
-
-namespace Org.BouncyCastle.Apache.Bzip2
-{
- /**
- * A simple class the hold and calculate the CRC for sanity checking
- * of the data.
- *
- * @author <a href="mailto:keiron@aftexsw.com">Keiron Liddle</a>
- */
- internal class CRC
- {
- // Values are byte-reversed
- private static readonly uint[] Crc32Table = {
- 0x00000000, 0xB71DC104, 0x6E3B8209, 0xD926430D,
- 0xDC760413, 0x6B6BC517, 0xB24D861A, 0x0550471E,
- 0xB8ED0826, 0x0FF0C922, 0xD6D68A2F, 0x61CB4B2B,
- 0x649B0C35, 0xD386CD31, 0x0AA08E3C, 0xBDBD4F38,
- 0x70DB114C, 0xC7C6D048, 0x1EE09345, 0xA9FD5241,
- 0xACAD155F, 0x1BB0D45B, 0xC2969756, 0x758B5652,
- 0xC836196A, 0x7F2BD86E, 0xA60D9B63, 0x11105A67,
- 0x14401D79, 0xA35DDC7D, 0x7A7B9F70, 0xCD665E74,
- 0xE0B62398, 0x57ABE29C, 0x8E8DA191, 0x39906095,
- 0x3CC0278B, 0x8BDDE68F, 0x52FBA582, 0xE5E66486,
- 0x585B2BBE, 0xEF46EABA, 0x3660A9B7, 0x817D68B3,
- 0x842D2FAD, 0x3330EEA9, 0xEA16ADA4, 0x5D0B6CA0,
- 0x906D32D4, 0x2770F3D0, 0xFE56B0DD, 0x494B71D9,
- 0x4C1B36C7, 0xFB06F7C3, 0x2220B4CE, 0x953D75CA,
- 0x28803AF2, 0x9F9DFBF6, 0x46BBB8FB, 0xF1A679FF,
- 0xF4F63EE1, 0x43EBFFE5, 0x9ACDBCE8, 0x2DD07DEC,
- 0x77708634, 0xC06D4730, 0x194B043D, 0xAE56C539,
- 0xAB068227, 0x1C1B4323, 0xC53D002E, 0x7220C12A,
- 0xCF9D8E12, 0x78804F16, 0xA1A60C1B, 0x16BBCD1F,
- 0x13EB8A01, 0xA4F64B05, 0x7DD00808, 0xCACDC90C,
- 0x07AB9778, 0xB0B6567C, 0x69901571, 0xDE8DD475,
- 0xDBDD936B, 0x6CC0526F, 0xB5E61162, 0x02FBD066,
- 0xBF469F5E, 0x085B5E5A, 0xD17D1D57, 0x6660DC53,
- 0x63309B4D, 0xD42D5A49, 0x0D0B1944, 0xBA16D840,
- 0x97C6A5AC, 0x20DB64A8, 0xF9FD27A5, 0x4EE0E6A1,
- 0x4BB0A1BF, 0xFCAD60BB, 0x258B23B6, 0x9296E2B2,
- 0x2F2BAD8A, 0x98366C8E, 0x41102F83, 0xF60DEE87,
- 0xF35DA999, 0x4440689D, 0x9D662B90, 0x2A7BEA94,
- 0xE71DB4E0, 0x500075E4, 0x892636E9, 0x3E3BF7ED,
- 0x3B6BB0F3, 0x8C7671F7, 0x555032FA, 0xE24DF3FE,
- 0x5FF0BCC6, 0xE8ED7DC2, 0x31CB3ECF, 0x86D6FFCB,
- 0x8386B8D5, 0x349B79D1, 0xEDBD3ADC, 0x5AA0FBD8,
- 0xEEE00C69, 0x59FDCD6D, 0x80DB8E60, 0x37C64F64,
- 0x3296087A, 0x858BC97E, 0x5CAD8A73, 0xEBB04B77,
- 0x560D044F, 0xE110C54B, 0x38368646, 0x8F2B4742,
- 0x8A7B005C, 0x3D66C158, 0xE4408255, 0x535D4351,
- 0x9E3B1D25, 0x2926DC21, 0xF0009F2C, 0x471D5E28,
- 0x424D1936, 0xF550D832, 0x2C769B3F, 0x9B6B5A3B,
- 0x26D61503, 0x91CBD407, 0x48ED970A, 0xFFF0560E,
- 0xFAA01110, 0x4DBDD014, 0x949B9319, 0x2386521D,
- 0x0E562FF1, 0xB94BEEF5, 0x606DADF8, 0xD7706CFC,
- 0xD2202BE2, 0x653DEAE6, 0xBC1BA9EB, 0x0B0668EF,
- 0xB6BB27D7, 0x01A6E6D3, 0xD880A5DE, 0x6F9D64DA,
- 0x6ACD23C4, 0xDDD0E2C0, 0x04F6A1CD, 0xB3EB60C9,
- 0x7E8D3EBD, 0xC990FFB9, 0x10B6BCB4, 0xA7AB7DB0,
- 0xA2FB3AAE, 0x15E6FBAA, 0xCCC0B8A7, 0x7BDD79A3,
- 0xC660369B, 0x717DF79F, 0xA85BB492, 0x1F467596,
- 0x1A163288, 0xAD0BF38C, 0x742DB081, 0xC3307185,
- 0x99908A5D, 0x2E8D4B59, 0xF7AB0854, 0x40B6C950,
- 0x45E68E4E, 0xF2FB4F4A, 0x2BDD0C47, 0x9CC0CD43,
- 0x217D827B, 0x9660437F, 0x4F460072, 0xF85BC176,
- 0xFD0B8668, 0x4A16476C, 0x93300461, 0x242DC565,
- 0xE94B9B11, 0x5E565A15, 0x87701918, 0x306DD81C,
- 0x353D9F02, 0x82205E06, 0x5B061D0B, 0xEC1BDC0F,
- 0x51A69337, 0xE6BB5233, 0x3F9D113E, 0x8880D03A,
- 0x8DD09724, 0x3ACD5620, 0xE3EB152D, 0x54F6D429,
- 0x7926A9C5, 0xCE3B68C1, 0x171D2BCC, 0xA000EAC8,
- 0xA550ADD6, 0x124D6CD2, 0xCB6B2FDF, 0x7C76EEDB,
- 0xC1CBA1E3, 0x76D660E7, 0xAFF023EA, 0x18EDE2EE,
- 0x1DBDA5F0, 0xAAA064F4, 0x738627F9, 0xC49BE6FD,
- 0x09FDB889, 0xBEE0798D, 0x67C63A80, 0xD0DBFB84,
- 0xD58BBC9A, 0x62967D9E, 0xBBB03E93, 0x0CADFF97,
- 0xB110B0AF, 0x060D71AB, 0xDF2B32A6, 0x6836F3A2,
- 0x6D66B4BC, 0xDA7B75B8, 0x035D36B5, 0xB440F7B1,
- };
-
- private uint m_value = 0U;
-
- internal void Initialise()
- {
- m_value = 0xFFFFFFFF;
- }
-
- internal int GetFinal()
- {
- return (int)~Integers.ReverseBytes(m_value);
- }
-
- internal void Update(byte inCh)
- {
- m_value = (m_value >> 8) ^ Crc32Table[(byte)(m_value ^ inCh)];
- }
-
- internal void UpdateRun(byte inCh, int runLength)
- {
- Debug.Assert(runLength >= 4);
-
- uint inCh2 = (uint)inCh << 8 | inCh;
- uint inCh4 = inCh2 << 16 | inCh2;
-
- do
- {
- m_value ^= inCh4;
- m_value = (m_value >> 8) ^ Crc32Table[(byte)m_value];
- m_value = (m_value >> 8) ^ Crc32Table[(byte)m_value];
- m_value = (m_value >> 8) ^ Crc32Table[(byte)m_value];
- m_value = (m_value >> 8) ^ Crc32Table[(byte)m_value];
- }
- while ((runLength -= 4) >= 4);
-
- switch (runLength & 3)
- {
- case 0:
- break;
- case 1:
- Update(inCh);
- break;
- case 2:
- Update(inCh);
- Update(inCh);
- break;
- case 3:
- Update(inCh);
- Update(inCh);
- Update(inCh);
- break;
- }
- }
- }
-}
|
