mirror of
https://github.com/ZDoom/qzdoom.git
synced 2024-11-24 13:01:47 +00:00
75b7db858f
- Added more output to zipdir and a -q option to turn it off. - Added -u option to zipdir to only recompress those files in a zip that have changed. - Added -d and -f options to zipdir. -d forces deflate compression, and -f forces a write of the zip, even if it's newer than all the files it contains. - Added support for bzip2 and LZMA compression to zipdir. SVN r1468 (trunk)
793 lines
22 KiB
C
793 lines
22 KiB
C
/* LzFindMt.c -- multithreaded Match finder for LZ algorithms
|
|
2008-10-04 : Igor Pavlov : Public domain */
|
|
|
|
#include "LzHash.h"
|
|
|
|
#include "LzFindMt.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;
|
|
}
|
|
|
|
#define RINOK_THREAD(x) { if ((x) != 0) return SZ_ERROR_THREAD; }
|
|
|
|
static SRes MtSync_Create2(CMtSync *p, unsigned (THREAD_FUNC_CALL_TYPE *startAddress)(void *), 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, unsigned (THREAD_FUNC_CALL_TYPE *startAddress)(void *), 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)), hashMask = hashMask; crc = 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)
|
|
|
|
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, mf->crc);
|
|
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
|
|
|
|
#define NO_INLINE MY_FAST_CALL
|
|
|
|
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(alloc, 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 THREAD_FUNC_CALL_TYPE HashThreadFunc2(void *p) { HashThreadFunc((CMatchFinderMt *)p); return 0; }
|
|
static unsigned THREAD_FUNC_CALL_TYPE BtThreadFunc2(void *p)
|
|
{
|
|
Byte allocaDummy[0x180];
|
|
int i = 0;
|
|
for (i = 0; i < 16; i++)
|
|
allocaDummy[i] = (Byte)i;
|
|
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 == 0)
|
|
{
|
|
p->hashBuf = (UInt32 *)alloc->Alloc(alloc, (kHashBufferSize + kBtBufferSize) * sizeof(UInt32));
|
|
if (p->hashBuf == 0)
|
|
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;
|
|
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->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(); */
|
|
}
|
|
|
|
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;
|
|
*/
|
|
}
|
|
}
|