diff -r 0135e64c6c66 -r c4fd2813b127 misc/libphysfs/lzma/C/Compress/Lz/MatchFinderMt.c
--- a/misc/libphysfs/lzma/C/Compress/Lz/MatchFinderMt.c	Wed May 16 18:22:28 2018 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,806 +0,0 @@
-/* MatchFinderMt.c */
-
-#ifdef _WIN32
-#define USE_ALLOCA
-#endif
-
-#ifdef USE_ALLOCA
-#ifdef _WIN32
-#include <malloc.h>
-#else
-#include <stdlib.h>
-#endif
-#endif
-
-#include "../../7zCrc.h"
-#include "LzHash.h"
-
-#include "MatchFinderMt.h"
-
-void MtSync_Construct(CMtSync *p)
-{
-  p->wasCreated = False;
-  p->csWasInitialized = False;
-  p->csWasEntered = False;
-  Thread_Construct(&p->thread);
-  Event_Construct(&p->canStart);
-  Event_Construct(&p->wasStarted);
-  Event_Construct(&p->wasStopped);
-  Semaphore_Construct(&p->freeSemaphore);
-  Semaphore_Construct(&p->filledSemaphore);
-}
-
-void MtSync_GetNextBlock(CMtSync *p)
-{
-  if (p->needStart)
-  {
-    p->numProcessedBlocks = 1;
-    p->needStart = False;
-    p->stopWriting = False;
-    p->exit = False;
-    Event_Reset(&p->wasStarted);
-    Event_Reset(&p->wasStopped);
-
-    Event_Set(&p->canStart);
-    Event_Wait(&p->wasStarted);
-  }
-  else
-  {
-    CriticalSection_Leave(&p->cs);
-    p->csWasEntered = False;
-    p->numProcessedBlocks++;
-    Semaphore_Release1(&p->freeSemaphore);
-  }
-  Semaphore_Wait(&p->filledSemaphore);
-  CriticalSection_Enter(&p->cs);
-  p->csWasEntered = True;
-}
-
-/* MtSync_StopWriting must be called if Writing was started */
-
-void MtSync_StopWriting(CMtSync *p)
-{ 
-  UInt32 myNumBlocks = p->numProcessedBlocks;
-  if (!Thread_WasCreated(&p->thread) || p->needStart)
-    return;
-  p->stopWriting = True;
-  if (p->csWasEntered)
-  {
-    CriticalSection_Leave(&p->cs);
-    p->csWasEntered = False;
-  }
-  Semaphore_Release1(&p->freeSemaphore);
- 
-  Event_Wait(&p->wasStopped);
-
-  while (myNumBlocks++ != p->numProcessedBlocks)
-  {
-    Semaphore_Wait(&p->filledSemaphore);
-    Semaphore_Release1(&p->freeSemaphore);
-  }
-  p->needStart = True;
-}
-
-void MtSync_Destruct(CMtSync *p)
-{
-  if (Thread_WasCreated(&p->thread))
-  {
-    MtSync_StopWriting(p);
-    p->exit = True;
-    if (p->needStart)
-      Event_Set(&p->canStart);
-    Thread_Wait(&p->thread);
-    Thread_Close(&p->thread);
-  }
-  if (p->csWasInitialized)
-  {
-    CriticalSection_Delete(&p->cs);
-    p->csWasInitialized = False;
-  }
-
-  Event_Close(&p->canStart);
-  Event_Close(&p->wasStarted);
-  Event_Close(&p->wasStopped);
-  Semaphore_Close(&p->freeSemaphore);
-  Semaphore_Close(&p->filledSemaphore);
-
-  p->wasCreated = False;
-}
-
-HRes MtSync_Create2(CMtSync *p, unsigned (StdCall *startAddress)(void *), void *obj, UInt32 numBlocks)
-{
-  if (p->wasCreated)
-    return SZ_OK;
-
-  RINOK(CriticalSection_Init(&p->cs));
-  p->csWasInitialized = True;
-
-  RINOK(AutoResetEvent_CreateNotSignaled(&p->canStart));
-  RINOK(AutoResetEvent_CreateNotSignaled(&p->wasStarted));
-  RINOK(AutoResetEvent_CreateNotSignaled(&p->wasStopped));
-  
-  RINOK(Semaphore_Create(&p->freeSemaphore, numBlocks, numBlocks));
-  RINOK(Semaphore_Create(&p->filledSemaphore, 0, numBlocks));
-
-  p->needStart = True;
-  
-  RINOK(Thread_Create(&p->thread, startAddress, obj));
-  p->wasCreated = True;
-  return SZ_OK;
-}
-
-HRes MtSync_Create(CMtSync *p, unsigned (StdCall *startAddress)(void *), void *obj, UInt32 numBlocks)
-{
-  HRes res = MtSync_Create2(p, startAddress, obj, numBlocks);
-  if (res != SZ_OK)
-    MtSync_Destruct(p);
-  return res;
-}
-
-
-void MtSync_Init(CMtSync *p) { p->needStart = True; }
-
-#define kMtMaxValForNormalize 0xFFFFFFFF
-
-#define DEF_GetHeads(name, v) \
-static void GetHeads ## name(const Byte *p, UInt32 pos, \
-UInt32 *hash, UInt32 hashMask, UInt32 *heads, UInt32 numHeads) { \
-for (; numHeads != 0; numHeads--) { \
-const UInt32 value = (v); p++; *heads++ = pos - hash[value]; hash[value] = pos++;  } }
-
-DEF_GetHeads(2,  (p[0] | ((UInt32)p[1] << 8)) & hashMask)
-DEF_GetHeads(3,  (g_CrcTable[p[0]] ^ p[1] ^ ((UInt32)p[2] << 8)) & hashMask)
-DEF_GetHeads(4,  (g_CrcTable[p[0]] ^ p[1] ^ ((UInt32)p[2] << 8) ^ (g_CrcTable[p[3]] << 5)) & hashMask)
-DEF_GetHeads(4b, (g_CrcTable[p[0]] ^ p[1] ^ ((UInt32)p[2] << 8) ^ ((UInt32)p[3] << 16)) & hashMask)
-DEF_GetHeads(5,  (g_CrcTable[p[0]] ^ p[1] ^ ((UInt32)p[2] << 8) ^ (g_CrcTable[p[3]] << 5) ^ (g_CrcTable[p[4]] << 3)) & hashMask)
-
-void HashThreadFunc(CMatchFinderMt *mt)
-{
-  CMtSync *p = &mt->hashSync;
-  for (;;)
-  {
-    UInt32 numProcessedBlocks = 0;
-    Event_Wait(&p->canStart);
-    Event_Set(&p->wasStarted);
-    for (;;)
-    {
-      if (p->exit)
-        return;
-      if (p->stopWriting)
-      {
-        p->numProcessedBlocks = numProcessedBlocks;
-        Event_Set(&p->wasStopped);
-        break;
-      }
-
-      {
-        CMatchFinder *mf = mt->MatchFinder;
-        if (MatchFinder_NeedMove(mf))
-        {
-          CriticalSection_Enter(&mt->btSync.cs);
-          CriticalSection_Enter(&mt->hashSync.cs);
-          {
-            const Byte *beforePtr = MatchFinder_GetPointerToCurrentPos(mf);
-            const Byte *afterPtr;
-            MatchFinder_MoveBlock(mf);
-            afterPtr = MatchFinder_GetPointerToCurrentPos(mf);
-            mt->pointerToCurPos -= beforePtr - afterPtr;
-            mt->buffer -= beforePtr - afterPtr;
-          }
-          CriticalSection_Leave(&mt->btSync.cs);
-          CriticalSection_Leave(&mt->hashSync.cs);
-          continue;
-        }
-
-        Semaphore_Wait(&p->freeSemaphore);
-
-        MatchFinder_ReadIfRequired(mf);
-        if (mf->pos > (kMtMaxValForNormalize - kMtHashBlockSize))
-        {
-          UInt32 subValue = (mf->pos - mf->historySize - 1);
-          MatchFinder_ReduceOffsets(mf, subValue);
-          MatchFinder_Normalize3(subValue, mf->hash + mf->fixedHashSize, mf->hashMask + 1);
-        }
-        {
-          UInt32 *heads = mt->hashBuf + ((numProcessedBlocks++) & kMtHashNumBlocksMask) * kMtHashBlockSize;
-          UInt32 num = mf->streamPos - mf->pos;
-          heads[0] = 2;
-          heads[1] = num;
-          if (num >= mf->numHashBytes)
-          {
-            num = num - mf->numHashBytes + 1;
-            if (num > kMtHashBlockSize - 2)
-              num = kMtHashBlockSize - 2;
-            mt->GetHeadsFunc(mf->buffer, mf->pos, mf->hash + mf->fixedHashSize, mf->hashMask, heads + 2, num);
-            heads[0] += num;
-          }
-          mf->pos += num;
-          mf->buffer += num;
-        }
-      }
-
-      Semaphore_Release1(&p->filledSemaphore);
-    }
-  }
-}
-
-void MatchFinderMt_GetNextBlock_Hash(CMatchFinderMt *p)
-{
-  MtSync_GetNextBlock(&p->hashSync);
-  p->hashBufPosLimit = p->hashBufPos = ((p->hashSync.numProcessedBlocks - 1) & kMtHashNumBlocksMask) * kMtHashBlockSize;
-  p->hashBufPosLimit += p->hashBuf[p->hashBufPos++];
-  p->hashNumAvail = p->hashBuf[p->hashBufPos++];
-}
-
-#define kEmptyHashValue 0
-
-/* #define MFMT_GM_INLINE */
-
-#ifdef MFMT_GM_INLINE
-
-#if _MSC_VER >= 1300
-#define NO_INLINE __declspec(noinline) __fastcall 
-#else
-#ifdef _MSC_VER
-#define NO_INLINE __fastcall 
-#endif
-#endif
-
-Int32 NO_INLINE GetMatchesSpecN(UInt32 lenLimit, UInt32 pos, const Byte *cur, CLzRef *son, 
-    UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 _cutValue, 
-    UInt32 *_distances, UInt32 _maxLen, const UInt32 *hash, Int32 limit, UInt32 size, UInt32 *posRes)
-{
-  do
-  {
-  UInt32 *distances = _distances + 1;
-  UInt32 curMatch = pos - *hash++;
-
-  CLzRef *ptr0 = son + (_cyclicBufferPos << 1) + 1;
-  CLzRef *ptr1 = son + (_cyclicBufferPos << 1);
-  UInt32 len0 = 0, len1 = 0;
-  UInt32 cutValue = _cutValue;
-  UInt32 maxLen = _maxLen;
-  for (;;)
-  {
-    UInt32 delta = pos - curMatch;
-    if (cutValue-- == 0 || delta >= _cyclicBufferSize)
-    {
-      *ptr0 = *ptr1 = kEmptyHashValue;
-      break;
-    }
-    {
-      CLzRef *pair = son + ((_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)) << 1);
-      const Byte *pb = cur - delta;
-      UInt32 len = (len0 < len1 ? len0 : len1);
-      if (pb[len] == cur[len])
-      {
-        if (++len != lenLimit && pb[len] == cur[len])
-          while(++len != lenLimit)
-            if (pb[len] != cur[len])
-              break;
-        if (maxLen < len)
-        {
-          *distances++ = maxLen = len;
-          *distances++ = delta - 1;
-          if (len == lenLimit)
-          {
-            *ptr1 = pair[0];
-            *ptr0 = pair[1];
-            break;
-          }
-        }
-      }
-      if (pb[len] < cur[len])
-      {
-        *ptr1 = curMatch;
-        ptr1 = pair + 1;
-        curMatch = *ptr1;
-        len1 = len;
-      }
-      else
-      {
-        *ptr0 = curMatch;
-        ptr0 = pair;
-        curMatch = *ptr0;
-        len0 = len;
-      }
-    }
-  }
-  pos++;
-  _cyclicBufferPos++;
-  cur++;
-  {
-    UInt32 num = (UInt32)(distances - _distances);
-    *_distances = num - 1;
-    _distances += num;
-    limit -= num;
-  }
-  }
-  while (limit > 0 && --size != 0);
-  *posRes = pos;
-  return limit;
-}
-
-#endif
-
-void BtGetMatches(CMatchFinderMt *p, UInt32 *distances)
-{
-  UInt32 numProcessed = 0;
-  UInt32 curPos = 2;
-  UInt32 limit = kMtBtBlockSize - (p->matchMaxLen * 2);
-  distances[1] = p->hashNumAvail;
-  while (curPos < limit)
-  {
-    if (p->hashBufPos == p->hashBufPosLimit)
-    {
-      MatchFinderMt_GetNextBlock_Hash(p);
-      distances[1] = numProcessed + p->hashNumAvail;
-      if (p->hashNumAvail >= p->numHashBytes)
-        continue;
-      for (; p->hashNumAvail != 0; p->hashNumAvail--)
-        distances[curPos++] = 0;
-      break;
-    }
-    {
-      UInt32 size = p->hashBufPosLimit - p->hashBufPos;
-      UInt32 lenLimit = p->matchMaxLen;
-      UInt32 pos = p->pos;
-      UInt32 cyclicBufferPos = p->cyclicBufferPos;
-      if (lenLimit >= p->hashNumAvail)
-        lenLimit = p->hashNumAvail;
-      {
-        UInt32 size2 = p->hashNumAvail - lenLimit + 1;
-        if (size2 < size)
-          size = size2;
-        size2 = p->cyclicBufferSize - cyclicBufferPos;
-        if (size2 < size)
-          size = size2;
-      }
-      #ifndef MFMT_GM_INLINE
-      while (curPos < limit && size-- != 0)
-      {
-        UInt32 *startDistances = distances + curPos;
-        UInt32 num = (UInt32)(GetMatchesSpec1(lenLimit, pos - p->hashBuf[p->hashBufPos++], 
-          pos, p->buffer, p->son, cyclicBufferPos, p->cyclicBufferSize, p->cutValue, 
-          startDistances + 1, p->numHashBytes - 1) - startDistances);
-        *startDistances = num - 1;
-        curPos += num;
-        cyclicBufferPos++;
-        pos++;
-        p->buffer++;
-      }
-      #else
-      {
-        UInt32 posRes;
-        curPos = limit - GetMatchesSpecN(lenLimit, pos, p->buffer, p->son, cyclicBufferPos, p->cyclicBufferSize, p->cutValue, 
-          distances + curPos, p->numHashBytes - 1, p->hashBuf + p->hashBufPos, (Int32)(limit - curPos) , size, &posRes);
-        p->hashBufPos += posRes - pos;
-        cyclicBufferPos += posRes - pos;
-        p->buffer += posRes - pos;
-        pos = posRes;
-      }
-      #endif
-
-      numProcessed += pos - p->pos;
-      p->hashNumAvail -= pos - p->pos;
-      p->pos = pos;
-      if (cyclicBufferPos == p->cyclicBufferSize)
-        cyclicBufferPos = 0;
-      p->cyclicBufferPos = cyclicBufferPos;
-    }
-  }
-  distances[0] = curPos;
-}
-
-void BtFillBlock(CMatchFinderMt *p, UInt32 globalBlockIndex)
-{
-  CMtSync *sync = &p->hashSync;
-  if (!sync->needStart)
-  {
-    CriticalSection_Enter(&sync->cs);
-    sync->csWasEntered = True;
-  }
-  
-  BtGetMatches(p, p->btBuf + (globalBlockIndex & kMtBtNumBlocksMask) * kMtBtBlockSize);
-
-  if (p->pos > kMtMaxValForNormalize - kMtBtBlockSize)
-  {
-    UInt32 subValue = p->pos - p->cyclicBufferSize;
-    MatchFinder_Normalize3(subValue, p->son, p->cyclicBufferSize * 2);
-    p->pos -= subValue;
-  }
-
-  if (!sync->needStart)
-  {
-    CriticalSection_Leave(&sync->cs);
-    sync->csWasEntered = False;
-  }
-}
-
-void BtThreadFunc(CMatchFinderMt *mt)
-{
-  CMtSync *p = &mt->btSync;
-  for (;;)
-  {
-    UInt32 blockIndex = 0;
-    Event_Wait(&p->canStart);
-    Event_Set(&p->wasStarted);
-    for (;;)
-    {
-      if (p->exit)
-        return;
-      if (p->stopWriting)
-      {
-        p->numProcessedBlocks = blockIndex;
-        MtSync_StopWriting(&mt->hashSync);
-        Event_Set(&p->wasStopped);
-        break;
-      }
-      Semaphore_Wait(&p->freeSemaphore);
-      BtFillBlock(mt, blockIndex++);
-      Semaphore_Release1(&p->filledSemaphore);
-    }
-  }
-}
-
-void MatchFinderMt_Construct(CMatchFinderMt *p)
-{
-  p->hashBuf = 0;
-  MtSync_Construct(&p->hashSync);
-  MtSync_Construct(&p->btSync);
-}
-
-void MatchFinderMt_FreeMem(CMatchFinderMt *p, ISzAlloc *alloc)
-{
-  alloc->Free(p->hashBuf);
-  p->hashBuf = 0;
-}
-
-void MatchFinderMt_Destruct(CMatchFinderMt *p, ISzAlloc *alloc)
-{
-  MtSync_Destruct(&p->hashSync);
-  MtSync_Destruct(&p->btSync);
-  MatchFinderMt_FreeMem(p, alloc);
-}
-
-#define kHashBufferSize (kMtHashBlockSize * kMtHashNumBlocks)
-#define kBtBufferSize (kMtBtBlockSize * kMtBtNumBlocks)
-
-static unsigned StdCall HashThreadFunc2(void *p) { HashThreadFunc((CMatchFinderMt *)p);  return 0; }
-static unsigned StdCall BtThreadFunc2(void *p) 
-{ 
-  #ifdef USE_ALLOCA
-  alloca(0x180);
-  #endif
-  BtThreadFunc((CMatchFinderMt *)p); 
-  return 0; 
-}
-
-HRes MatchFinderMt_Create(CMatchFinderMt *p, UInt32 historySize, UInt32 keepAddBufferBefore, 
-    UInt32 matchMaxLen, UInt32 keepAddBufferAfter, ISzAlloc *alloc)
-{ 
-  CMatchFinder *mf = p->MatchFinder;
-  p->historySize = historySize;
-  if (kMtBtBlockSize <= matchMaxLen * 4)
-    return E_INVALIDARG;
-  if (p->hashBuf == 0)
-  {
-    p->hashBuf = (UInt32 *)alloc->Alloc((kHashBufferSize + kBtBufferSize) * sizeof(UInt32));
-    if (p->hashBuf == 0)
-      return SZE_OUTOFMEMORY;
-    p->btBuf = p->hashBuf + kHashBufferSize;
-  }
-  keepAddBufferBefore += (kHashBufferSize + kBtBufferSize);
-  keepAddBufferAfter += kMtHashBlockSize;
-  if (!MatchFinder_Create(mf, historySize, keepAddBufferBefore, matchMaxLen, keepAddBufferAfter, alloc))
-    return SZE_OUTOFMEMORY;
-
-  RINOK(MtSync_Create(&p->hashSync, HashThreadFunc2, p, kMtHashNumBlocks));
-  RINOK(MtSync_Create(&p->btSync, BtThreadFunc2, p, kMtBtNumBlocks));
-  return SZ_OK;
-}
-
-/* Call it after ReleaseStream / SetStream */
-void MatchFinderMt_Init(CMatchFinderMt *p)
-{ 
-  CMatchFinder *mf = p->MatchFinder;
-  p->btBufPos = p->btBufPosLimit = 0;
-  p->hashBufPos = p->hashBufPosLimit = 0;
-  MatchFinder_Init(mf);
-  p->pointerToCurPos = MatchFinder_GetPointerToCurrentPos(mf);
-  p->btNumAvailBytes = 0;
-  p->lzPos = p->historySize + 1;
-
-  p->hash = mf->hash;
-  p->fixedHashSize = mf->fixedHashSize;
-
-  p->son = mf->son;
-  p->matchMaxLen = mf->matchMaxLen;
-  p->numHashBytes = mf->numHashBytes;
-  p->pos = mf->pos;
-  p->buffer = mf->buffer;
-  p->cyclicBufferPos = mf->cyclicBufferPos;
-  p->cyclicBufferSize = mf->cyclicBufferSize;
-  p->cutValue = mf->cutValue;
-}
-
-/* ReleaseStream is required to finish multithreading */
-void MatchFinderMt_ReleaseStream(CMatchFinderMt *p)
-{ 
-  MtSync_StopWriting(&p->btSync);
-  /* p->MatchFinder->ReleaseStream(); */
-}
-
-void MatchFinderMt_Normalize(CMatchFinderMt *p)
-{
-  MatchFinder_Normalize3(p->lzPos - p->historySize - 1, p->hash, p->fixedHashSize);
-  p->lzPos = p->historySize + 1;
-}
-
-void MatchFinderMt_GetNextBlock_Bt(CMatchFinderMt *p)
-{
-  UInt32 blockIndex;
-  MtSync_GetNextBlock(&p->btSync);
-  blockIndex = ((p->btSync.numProcessedBlocks - 1) & kMtBtNumBlocksMask);
-  p->btBufPosLimit = p->btBufPos = blockIndex * kMtBtBlockSize;
-  p->btBufPosLimit += p->btBuf[p->btBufPos++];
-  p->btNumAvailBytes = p->btBuf[p->btBufPos++];
-  if (p->lzPos >= kMtMaxValForNormalize - kMtBtBlockSize) 
-    MatchFinderMt_Normalize(p);
-}
-
-const Byte * MatchFinderMt_GetPointerToCurrentPos(CMatchFinderMt *p)
-{
-  return p->pointerToCurPos;
-}
-
-#define GET_NEXT_BLOCK_IF_REQUIRED if (p->btBufPos == p->btBufPosLimit) MatchFinderMt_GetNextBlock_Bt(p);
-
-UInt32 MatchFinderMt_GetNumAvailableBytes(CMatchFinderMt *p)
-{ 
-  GET_NEXT_BLOCK_IF_REQUIRED;
-  return p->btNumAvailBytes;
-}
-
-Byte MatchFinderMt_GetIndexByte(CMatchFinderMt *p, Int32 index)
-{ 
-  return p->pointerToCurPos[index]; 
-}
-
-UInt32 * MixMatches2(CMatchFinderMt *p, UInt32 matchMinPos, UInt32 *distances)
-{
-  UInt32 hash2Value, curMatch2;
-  UInt32 *hash = p->hash;
-  const Byte *cur = p->pointerToCurPos;
-  UInt32 lzPos = p->lzPos; 
-  MT_HASH2_CALC
-      
-  curMatch2 = hash[hash2Value];
-  hash[hash2Value] = lzPos;
-
-  if (curMatch2 >= matchMinPos) 
-    if (cur[(ptrdiff_t)curMatch2 - lzPos] == cur[0])
-    {
-      *distances++ = 2; 
-      *distances++ = lzPos - curMatch2 - 1;
-    }
-  return distances;
-}
-
-UInt32 * MixMatches3(CMatchFinderMt *p, UInt32 matchMinPos, UInt32 *distances)
-{
-  UInt32 hash2Value, hash3Value, curMatch2, curMatch3;
-  UInt32 *hash = p->hash;
-  const Byte *cur = p->pointerToCurPos;
-  UInt32 lzPos = p->lzPos; 
-  MT_HASH3_CALC
-
-  curMatch2 = hash[                hash2Value];
-  curMatch3 = hash[kFix3HashSize + hash3Value];
-  
-  hash[                hash2Value] = 
-  hash[kFix3HashSize + hash3Value] = 
-    lzPos;
-
-  if (curMatch2 >= matchMinPos && cur[(ptrdiff_t)curMatch2 - lzPos] == cur[0])
-  { 
-    distances[1] = lzPos - curMatch2 - 1;
-    if (cur[(ptrdiff_t)curMatch2 - lzPos + 2] == cur[2])
-    {
-      distances[0] = 3;
-      return distances + 2;
-    }
-    distances[0] = 2; 
-    distances += 2;
-  }
-  if (curMatch3 >= matchMinPos && cur[(ptrdiff_t)curMatch3 - lzPos] == cur[0])
-  { 
-    *distances++ = 3; 
-    *distances++ = lzPos - curMatch3 - 1; 
-  }
-  return distances;
-}
-
-/*
-UInt32 *MixMatches4(CMatchFinderMt *p, UInt32 matchMinPos, UInt32 *distances)
-{
-  UInt32 hash2Value, hash3Value, hash4Value, curMatch2, curMatch3, curMatch4;
-  UInt32 *hash = p->hash;
-  const Byte *cur = p->pointerToCurPos;
-  UInt32 lzPos = p->lzPos; 
-  MT_HASH4_CALC
-      
-  curMatch2 = hash[                hash2Value];
-  curMatch3 = hash[kFix3HashSize + hash3Value];
-  curMatch4 = hash[kFix4HashSize + hash4Value];
-  
-  hash[                hash2Value] = 
-  hash[kFix3HashSize + hash3Value] = 
-  hash[kFix4HashSize + hash4Value] = 
-    lzPos;
-
-  if (curMatch2 >= matchMinPos && cur[(ptrdiff_t)curMatch2 - lzPos] == cur[0])
-  {
-    distances[1] = lzPos - curMatch2 - 1;
-    if (cur[(ptrdiff_t)curMatch2 - lzPos + 2] == cur[2])
-    {
-      distances[0] =  (cur[(ptrdiff_t)curMatch2 - lzPos + 3] == cur[3]) ? 4 : 3;
-      return distances + 2;
-    }
-    distances[0] = 2;
-    distances += 2;
-  }
-  if (curMatch3 >= matchMinPos && cur[(ptrdiff_t)curMatch3 - lzPos] == cur[0])
-  {
-    distances[1] = lzPos - curMatch3 - 1;
-    if (cur[(ptrdiff_t)curMatch3 - lzPos + 3] == cur[3])
-    {
-      distances[0] = 4;
-      return distances + 2;
-    }
-    distances[0] = 3;
-    distances += 2;
-  }
-
-  if (curMatch4 >= matchMinPos)
-    if (
-      cur[(ptrdiff_t)curMatch4 - lzPos] == cur[0] &&
-      cur[(ptrdiff_t)curMatch4 - lzPos + 3] == cur[3]
-      )
-    {
-      *distances++ = 4;
-      *distances++ = lzPos - curMatch4 - 1;
-    }
-  return distances;
-}
-*/
-
-#define INCREASE_LZ_POS p->lzPos++; p->pointerToCurPos++;
-
-UInt32 MatchFinderMt2_GetMatches(CMatchFinderMt *p, UInt32 *distances)
-{ 
-  const UInt32 *btBuf = p->btBuf + p->btBufPos;
-  UInt32 len = *btBuf++;
-  p->btBufPos += 1 + len;
-  p->btNumAvailBytes--;
-  {
-    UInt32 i;
-    for (i = 0; i < len; i += 2)
-    {
-      *distances++ = *btBuf++;
-      *distances++ = *btBuf++;
-    }
-  }
-  INCREASE_LZ_POS
-  return len;
-}
-
-UInt32 MatchFinderMt_GetMatches(CMatchFinderMt *p, UInt32 *distances)
-{ 
-  const UInt32 *btBuf = p->btBuf + p->btBufPos;
-  UInt32 len = *btBuf++;
-  p->btBufPos += 1 + len;
-
-  if (len == 0)
-  {
-    if (p->btNumAvailBytes-- >= 4) 
-      len = (UInt32)(p->MixMatchesFunc(p, p->lzPos - p->historySize, distances) - (distances));
-  }
-  else
-  {
-    /* Condition: there are matches in btBuf with length < p->numHashBytes */
-    UInt32 *distances2;
-    p->btNumAvailBytes--;
-    distances2 = p->MixMatchesFunc(p, p->lzPos - btBuf[1], distances);
-    do 
-    {
-      *distances2++ = *btBuf++;
-      *distances2++ = *btBuf++;
-    }
-    while ((len -= 2) != 0);
-    len  = (UInt32)(distances2 - (distances));
-  }
-  INCREASE_LZ_POS
-  return len;
-}
-
-#define SKIP_HEADER2  do { GET_NEXT_BLOCK_IF_REQUIRED
-#define SKIP_HEADER(n) SKIP_HEADER2 if (p->btNumAvailBytes-- >= (n)) { const Byte *cur = p->pointerToCurPos; UInt32 *hash = p->hash;
-#define SKIP_FOOTER } INCREASE_LZ_POS p->btBufPos += p->btBuf[p->btBufPos] + 1; } while(--num != 0);
-
-void MatchFinderMt0_Skip(CMatchFinderMt *p, UInt32 num)
-{ 
-  SKIP_HEADER2 { p->btNumAvailBytes--;
-  SKIP_FOOTER
-}
-
-void MatchFinderMt2_Skip(CMatchFinderMt *p, UInt32 num)
-{ 
-  SKIP_HEADER(2)
-      UInt32 hash2Value;
-      MT_HASH2_CALC
-      hash[hash2Value] = p->lzPos;
-  SKIP_FOOTER
-}
-
-void MatchFinderMt3_Skip(CMatchFinderMt *p, UInt32 num)
-{ 
-  SKIP_HEADER(3)
-      UInt32 hash2Value, hash3Value;
-      MT_HASH3_CALC
-      hash[kFix3HashSize + hash3Value] = 
-      hash[                hash2Value] = 
-        p->lzPos;
-  SKIP_FOOTER
-}
-
-/*
-void MatchFinderMt4_Skip(CMatchFinderMt *p, UInt32 num)
-{ 
-  SKIP_HEADER(4)
-      UInt32 hash2Value, hash3Value, hash4Value;
-      MT_HASH4_CALC
-      hash[kFix4HashSize + hash4Value] = 
-      hash[kFix3HashSize + hash3Value] = 
-      hash[                hash2Value] = 
-        p->lzPos;
-  SKIP_FOOTER
-}
-*/
-
-void MatchFinderMt_CreateVTable(CMatchFinderMt *p, IMatchFinder *vTable)
-{
-  vTable->Init = (Mf_Init_Func)MatchFinderMt_Init;
-  vTable->GetIndexByte = (Mf_GetIndexByte_Func)MatchFinderMt_GetIndexByte;
-  vTable->GetNumAvailableBytes = (Mf_GetNumAvailableBytes_Func)MatchFinderMt_GetNumAvailableBytes;
-  vTable->GetPointerToCurrentPos = (Mf_GetPointerToCurrentPos_Func)MatchFinderMt_GetPointerToCurrentPos;
-  vTable->GetMatches = (Mf_GetMatches_Func)MatchFinderMt_GetMatches;
-  switch(p->MatchFinder->numHashBytes)
-  {
-    case 2:
-      p->GetHeadsFunc = GetHeads2;
-      p->MixMatchesFunc = (Mf_Mix_Matches)0;
-      vTable->Skip = (Mf_Skip_Func)MatchFinderMt0_Skip;
-      vTable->GetMatches = (Mf_GetMatches_Func)MatchFinderMt2_GetMatches;
-      break;
-    case 3:
-      p->GetHeadsFunc = GetHeads3;
-      p->MixMatchesFunc = (Mf_Mix_Matches)MixMatches2;
-      vTable->Skip = (Mf_Skip_Func)MatchFinderMt2_Skip;
-      break;
-    default:
-    /* case 4: */
-      p->GetHeadsFunc = p->MatchFinder->bigHash ? GetHeads4b : GetHeads4;
-      /* p->GetHeadsFunc = GetHeads4; */
-      p->MixMatchesFunc = (Mf_Mix_Matches)MixMatches3;
-      vTable->Skip = (Mf_Skip_Func)MatchFinderMt3_Skip;
-      break;
-    /*
-    default:
-      p->GetHeadsFunc = GetHeads5;
-      p->MixMatchesFunc = (Mf_Mix_Matches)MixMatches4;
-      vTable->Skip = (Mf_Skip_Func)MatchFinderMt4_Skip;
-      break;
-    */
-  }
-}