diff options
Diffstat (limited to 'BaseTools/Source/C/LzmaCompress/Sdk/C/LzFindMt.c')
| -rw-r--r-- | BaseTools/Source/C/LzmaCompress/Sdk/C/LzFindMt.c | 803 |
1 files changed, 0 insertions, 803 deletions
diff --git a/BaseTools/Source/C/LzmaCompress/Sdk/C/LzFindMt.c b/BaseTools/Source/C/LzmaCompress/Sdk/C/LzFindMt.c deleted file mode 100644 index cb61e0953a..0000000000 --- a/BaseTools/Source/C/LzmaCompress/Sdk/C/LzFindMt.c +++ /dev/null @@ -1,803 +0,0 @@ -/* LzFindMt.c -- multithreaded Match finder for LZ algorithms
-2015-10-15 : Igor Pavlov : Public domain */
-
-#include "Precomp.h"
-
-#include "LzHash.h"
-
-#include "LzFindMt.h"
-
-static 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);
-}
-
-static 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 */
-
-static 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;
-}
-
-static 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;
-}
-
-#define RINOK_THREAD(x) { if ((x) != 0) return SZ_ERROR_THREAD; }
-
-static SRes MtSync_Create2(CMtSync *p, THREAD_FUNC_TYPE startAddress, void *obj, UInt32 numBlocks)
-{
- if (p->wasCreated)
- return SZ_OK;
-
- RINOK_THREAD(CriticalSection_Init(&p->cs));
- p->csWasInitialized = True;
-
- RINOK_THREAD(AutoResetEvent_CreateNotSignaled(&p->canStart));
- RINOK_THREAD(AutoResetEvent_CreateNotSignaled(&p->wasStarted));
- RINOK_THREAD(AutoResetEvent_CreateNotSignaled(&p->wasStopped));
-
- RINOK_THREAD(Semaphore_Create(&p->freeSemaphore, numBlocks, numBlocks));
- RINOK_THREAD(Semaphore_Create(&p->filledSemaphore, 0, numBlocks));
-
- p->needStart = True;
-
- RINOK_THREAD(Thread_Create(&p->thread, startAddress, obj));
- p->wasCreated = True;
- return SZ_OK;
-}
-
-static SRes MtSync_Create(CMtSync *p, THREAD_FUNC_TYPE startAddress, void *obj, UInt32 numBlocks)
-{
- SRes 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_GetHeads2(name, v, action) \
- static void GetHeads ## name(const Byte *p, UInt32 pos, \
- UInt32 *hash, UInt32 hashMask, UInt32 *heads, UInt32 numHeads, const UInt32 *crc) \
- { action; for (; numHeads != 0; numHeads--) { \
- const UInt32 value = (v); p++; *heads++ = pos - hash[value]; hash[value] = pos++; } }
-
-#define DEF_GetHeads(name, v) DEF_GetHeads2(name, v, ;)
-
-DEF_GetHeads2(2, (p[0] | ((UInt32)p[1] << 8)), UNUSED_VAR(hashMask); UNUSED_VAR(crc); )
-DEF_GetHeads(3, (crc[p[0]] ^ p[1] ^ ((UInt32)p[2] << 8)) & hashMask)
-DEF_GetHeads(4, (crc[p[0]] ^ p[1] ^ ((UInt32)p[2] << 8) ^ (crc[p[3]] << 5)) & hashMask)
-DEF_GetHeads(4b, (crc[p[0]] ^ p[1] ^ ((UInt32)p[2] << 8) ^ ((UInt32)p[3] << 16)) & hashMask)
-/* DEF_GetHeads(5, (crc[p[0]] ^ p[1] ^ ((UInt32)p[2] << 8) ^ (crc[p[3]] << 5) ^ (crc[p[4]] << 3)) & hashMask) */
-
-static 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 = Inline_MatchFinder_GetPointerToCurrentPos(mf);
- ptrdiff_t offset;
- MatchFinder_MoveBlock(mf);
- offset = beforePtr - Inline_MatchFinder_GetPointerToCurrentPos(mf);
- mt->pointerToCurPos -= offset;
- mt->buffer -= offset;
- }
- 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, (size_t)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, mf->crc);
- heads[0] += num;
- }
- mf->pos += num;
- mf->buffer += num;
- }
- }
-
- Semaphore_Release1(&p->filledSemaphore);
- }
- }
-}
-
-static 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
-
-#define NO_INLINE MY_FAST_CALL
-
-static 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
-
-static 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;
- distances[0] = curPos + p->hashNumAvail;
- distances += curPos;
- for (; p->hashNumAvail != 0; p->hashNumAvail--)
- *distances++ = 0;
- return;
- }
- {
- 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;
-}
-
-static 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, (size_t)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 = NULL;
- MtSync_Construct(&p->hashSync);
- MtSync_Construct(&p->btSync);
-}
-
-static void MatchFinderMt_FreeMem(CMatchFinderMt *p, ISzAlloc *alloc)
-{
- alloc->Free(alloc, p->hashBuf);
- p->hashBuf = NULL;
-}
-
-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 THREAD_FUNC_RET_TYPE THREAD_FUNC_CALL_TYPE HashThreadFunc2(void *p) { HashThreadFunc((CMatchFinderMt *)p); return 0; }
-static THREAD_FUNC_RET_TYPE THREAD_FUNC_CALL_TYPE BtThreadFunc2(void *p)
-{
- Byte allocaDummy[0x180];
- unsigned i = 0;
- for (i = 0; i < 16; i++)
- allocaDummy[i] = (Byte)0;
- if (allocaDummy[0] == 0)
- BtThreadFunc((CMatchFinderMt *)p);
- return 0;
-}
-
-SRes 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 SZ_ERROR_PARAM;
- if (!p->hashBuf)
- {
- p->hashBuf = (UInt32 *)alloc->Alloc(alloc, (kHashBufferSize + kBtBufferSize) * sizeof(UInt32));
- if (!p->hashBuf)
- return SZ_ERROR_MEM;
- p->btBuf = p->hashBuf + kHashBufferSize;
- }
- keepAddBufferBefore += (kHashBufferSize + kBtBufferSize);
- keepAddBufferAfter += kMtHashBlockSize;
- if (!MatchFinder_Create(mf, historySize, keepAddBufferBefore, matchMaxLen, keepAddBufferAfter, alloc))
- return SZ_ERROR_MEM;
-
- 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;
-
- /* Init without data reading. We don't want to read data in this thread */
- MatchFinder_Init_2(mf, False);
-
- p->pointerToCurPos = Inline_MatchFinder_GetPointerToCurrentPos(mf);
- p->btNumAvailBytes = 0;
- p->lzPos = p->historySize + 1;
-
- p->hash = mf->hash;
- p->fixedHashSize = mf->fixedHashSize;
- p->crc = mf->crc;
-
- 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(); */
-}
-
-static void MatchFinderMt_Normalize(CMatchFinderMt *p)
-{
- MatchFinder_Normalize3(p->lzPos - p->historySize - 1, p->hash, p->fixedHashSize);
- p->lzPos = p->historySize + 1;
-}
-
-static 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);
-}
-
-static const Byte * MatchFinderMt_GetPointerToCurrentPos(CMatchFinderMt *p)
-{
- return p->pointerToCurPos;
-}
-
-#define GET_NEXT_BLOCK_IF_REQUIRED if (p->btBufPos == p->btBufPosLimit) MatchFinderMt_GetNextBlock_Bt(p);
-
-static UInt32 MatchFinderMt_GetNumAvailableBytes(CMatchFinderMt *p)
-{
- GET_NEXT_BLOCK_IF_REQUIRED;
- return p->btNumAvailBytes;
-}
-
-static UInt32 * MixMatches2(CMatchFinderMt *p, UInt32 matchMinPos, UInt32 *distances)
-{
- UInt32 h2, curMatch2;
- UInt32 *hash = p->hash;
- const Byte *cur = p->pointerToCurPos;
- UInt32 lzPos = p->lzPos;
- MT_HASH2_CALC
-
- curMatch2 = hash[h2];
- hash[h2] = lzPos;
-
- if (curMatch2 >= matchMinPos)
- if (cur[(ptrdiff_t)curMatch2 - lzPos] == cur[0])
- {
- *distances++ = 2;
- *distances++ = lzPos - curMatch2 - 1;
- }
-
- return distances;
-}
-
-static UInt32 * MixMatches3(CMatchFinderMt *p, UInt32 matchMinPos, UInt32 *distances)
-{
- UInt32 h2, h3, curMatch2, curMatch3;
- UInt32 *hash = p->hash;
- const Byte *cur = p->pointerToCurPos;
- UInt32 lzPos = p->lzPos;
- MT_HASH3_CALC
-
- curMatch2 = hash[ h2];
- curMatch3 = hash[kFix3HashSize + h3];
-
- hash[ h2] = lzPos;
- hash[kFix3HashSize + h3] = 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;
-}
-
-/*
-static UInt32 *MixMatches4(CMatchFinderMt *p, UInt32 matchMinPos, UInt32 *distances)
-{
- UInt32 h2, h3, h4, curMatch2, curMatch3, curMatch4;
- UInt32 *hash = p->hash;
- const Byte *cur = p->pointerToCurPos;
- UInt32 lzPos = p->lzPos;
- MT_HASH4_CALC
-
- curMatch2 = hash[ h2];
- curMatch3 = hash[kFix3HashSize + h3];
- curMatch4 = hash[kFix4HashSize + h4];
-
- hash[ h2] = lzPos;
- hash[kFix3HashSize + h3] = lzPos;
- hash[kFix4HashSize + h4] = 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++;
-
-static 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;
-}
-
-static UInt32 MatchFinderMt_GetMatches(CMatchFinderMt *p, UInt32 *distances)
-{
- const UInt32 *btBuf = p->btBuf + p->btBufPos;
- UInt32 len = *btBuf++;
- p->btBufPos += 1 + len;
-
- if (len == 0)
- {
- /* change for bt5 ! */
- 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_MT do { GET_NEXT_BLOCK_IF_REQUIRED
-#define SKIP_HEADER_MT(n) SKIP_HEADER2_MT if (p->btNumAvailBytes-- >= (n)) { const Byte *cur = p->pointerToCurPos; UInt32 *hash = p->hash;
-#define SKIP_FOOTER_MT } INCREASE_LZ_POS p->btBufPos += p->btBuf[p->btBufPos] + 1; } while (--num != 0);
-
-static void MatchFinderMt0_Skip(CMatchFinderMt *p, UInt32 num)
-{
- SKIP_HEADER2_MT { p->btNumAvailBytes--;
- SKIP_FOOTER_MT
-}
-
-static void MatchFinderMt2_Skip(CMatchFinderMt *p, UInt32 num)
-{
- SKIP_HEADER_MT(2)
- UInt32 h2;
- MT_HASH2_CALC
- hash[h2] = p->lzPos;
- SKIP_FOOTER_MT
-}
-
-static void MatchFinderMt3_Skip(CMatchFinderMt *p, UInt32 num)
-{
- SKIP_HEADER_MT(3)
- UInt32 h2, h3;
- MT_HASH3_CALC
- hash[kFix3HashSize + h3] =
- hash[ h2] =
- p->lzPos;
- SKIP_FOOTER_MT
-}
-
-/*
-static void MatchFinderMt4_Skip(CMatchFinderMt *p, UInt32 num)
-{
- SKIP_HEADER_MT(4)
- UInt32 h2, h3, h4;
- MT_HASH4_CALC
- hash[kFix4HashSize + h4] =
- hash[kFix3HashSize + h3] =
- hash[ h2] =
- p->lzPos;
- SKIP_FOOTER_MT
-}
-*/
-
-void MatchFinderMt_CreateVTable(CMatchFinderMt *p, IMatchFinder *vTable)
-{
- vTable->Init = (Mf_Init_Func)MatchFinderMt_Init;
- 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->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;
- */
- }
-}
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