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@ -1,5 +1,5 @@
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/* LzFind.c -- Match finder for LZ algorithms
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2017-06-10 : Igor Pavlov : Public domain */
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2018-07-08 : Igor Pavlov : Public domain */
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#include "Precomp.h"
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@ -138,7 +138,7 @@ static void MatchFinder_SetDefaultSettings(CMatchFinder *p)
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void MatchFinder_Construct(CMatchFinder *p)
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{
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UInt32 i;
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unsigned i;
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p->bufferBase = NULL;
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p->directInput = 0;
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p->hash = NULL;
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@ -147,7 +147,7 @@ void MatchFinder_Construct(CMatchFinder *p)
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for (i = 0; i < 256; i++)
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{
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UInt32 r = i;
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UInt32 r = (UInt32)i;
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unsigned j;
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for (j = 0; j < 8; j++)
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r = (r >> 1) ^ (kCrcPoly & ((UInt32)0 - (r & 1)));
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@ -368,6 +368,8 @@ static void MatchFinder_Normalize(CMatchFinder *p)
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MatchFinder_ReduceOffsets(p, subValue);
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}
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MY_NO_INLINE
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static void MatchFinder_CheckLimits(CMatchFinder *p)
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{
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if (p->pos == kMaxValForNormalize)
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@ -379,10 +381,16 @@ static void MatchFinder_CheckLimits(CMatchFinder *p)
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MatchFinder_SetLimits(p);
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}
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static UInt32 * Hc_GetMatchesSpec(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son,
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/*
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(lenLimit > maxLen)
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*/
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MY_FORCE_INLINE
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static UInt32 * Hc_GetMatchesSpec(unsigned lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son,
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UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 cutValue,
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UInt32 *distances, UInt32 maxLen)
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UInt32 *distances, unsigned maxLen)
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{
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/*
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son[_cyclicBufferPos] = curMatch;
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for (;;)
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{
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@ -400,7 +408,8 @@ static UInt32 * Hc_GetMatchesSpec(UInt32 lenLimit, UInt32 curMatch, UInt32 pos,
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break;
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if (maxLen < len)
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{
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*distances++ = maxLen = len;
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maxLen = len;
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*distances++ = len;
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*distances++ = delta - 1;
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if (len == lenLimit)
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return distances;
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@ -408,15 +417,58 @@ static UInt32 * Hc_GetMatchesSpec(UInt32 lenLimit, UInt32 curMatch, UInt32 pos,
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}
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}
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}
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*/
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const Byte *lim = cur + lenLimit;
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son[_cyclicBufferPos] = curMatch;
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do
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{
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UInt32 delta = pos - curMatch;
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if (delta >= _cyclicBufferSize)
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break;
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{
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ptrdiff_t diff;
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curMatch = son[_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)];
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diff = (ptrdiff_t)0 - delta;
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if (cur[maxLen] == cur[maxLen + diff])
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{
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const Byte *c = cur;
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while (*c == c[diff])
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{
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if (++c == lim)
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{
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distances[0] = (UInt32)(lim - cur);
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distances[1] = delta - 1;
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return distances + 2;
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}
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}
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{
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unsigned len = (unsigned)(c - cur);
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if (maxLen < len)
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{
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maxLen = len;
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distances[0] = (UInt32)len;
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distances[1] = delta - 1;
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distances += 2;
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}
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}
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}
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}
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}
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while (--cutValue);
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return distances;
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}
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MY_FORCE_INLINE
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UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son,
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UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 cutValue,
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UInt32 *distances, UInt32 maxLen)
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{
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CLzRef *ptr0 = son + (_cyclicBufferPos << 1) + 1;
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CLzRef *ptr1 = son + (_cyclicBufferPos << 1);
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UInt32 len0 = 0, len1 = 0;
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CLzRef *ptr0 = son + ((size_t)_cyclicBufferPos << 1) + 1;
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CLzRef *ptr1 = son + ((size_t)_cyclicBufferPos << 1);
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unsigned len0 = 0, len1 = 0;
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for (;;)
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{
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UInt32 delta = pos - curMatch;
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@ -426,9 +478,10 @@ UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byt
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return distances;
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}
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{
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CLzRef *pair = son + ((_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)) << 1);
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CLzRef *pair = son + ((size_t)(_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)) << 1);
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const Byte *pb = cur - delta;
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UInt32 len = (len0 < len1 ? len0 : len1);
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unsigned len = (len0 < len1 ? len0 : len1);
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UInt32 pair0 = pair[0];
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if (pb[len] == cur[len])
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{
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if (++len != lenLimit && pb[len] == cur[len])
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@ -437,11 +490,12 @@ UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byt
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break;
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if (maxLen < len)
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{
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*distances++ = maxLen = len;
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maxLen = (UInt32)len;
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*distances++ = (UInt32)len;
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*distances++ = delta - 1;
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if (len == lenLimit)
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{
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*ptr1 = pair[0];
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*ptr1 = pair0;
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*ptr0 = pair[1];
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return distances;
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}
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@ -468,9 +522,9 @@ UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byt
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static void SkipMatchesSpec(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son,
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UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 cutValue)
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{
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CLzRef *ptr0 = son + (_cyclicBufferPos << 1) + 1;
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CLzRef *ptr1 = son + (_cyclicBufferPos << 1);
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UInt32 len0 = 0, len1 = 0;
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CLzRef *ptr0 = son + ((size_t)_cyclicBufferPos << 1) + 1;
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CLzRef *ptr1 = son + ((size_t)_cyclicBufferPos << 1);
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unsigned len0 = 0, len1 = 0;
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for (;;)
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{
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UInt32 delta = pos - curMatch;
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@ -480,9 +534,9 @@ static void SkipMatchesSpec(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const
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return;
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}
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{
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CLzRef *pair = son + ((_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)) << 1);
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CLzRef *pair = son + ((size_t)(_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)) << 1);
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const Byte *pb = cur - delta;
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UInt32 len = (len0 < len1 ? len0 : len1);
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unsigned len = (len0 < len1 ? len0 : len1);
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if (pb[len] == cur[len])
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{
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while (++len != lenLimit)
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@ -520,13 +574,13 @@ static void SkipMatchesSpec(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const
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p->buffer++; \
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if (++p->pos == p->posLimit) MatchFinder_CheckLimits(p);
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#define MOVE_POS_RET MOVE_POS return offset;
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#define MOVE_POS_RET MOVE_POS return (UInt32)offset;
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static void MatchFinder_MovePos(CMatchFinder *p) { MOVE_POS; }
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#define GET_MATCHES_HEADER2(minLen, ret_op) \
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UInt32 lenLimit; UInt32 hv; const Byte *cur; UInt32 curMatch; \
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lenLimit = p->lenLimit; { if (lenLimit < minLen) { MatchFinder_MovePos(p); ret_op; }} \
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unsigned lenLimit; UInt32 hv; const Byte *cur; UInt32 curMatch; \
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lenLimit = (unsigned)p->lenLimit; { if (lenLimit < minLen) { MatchFinder_MovePos(p); ret_op; }} \
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cur = p->buffer;
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#define GET_MATCHES_HEADER(minLen) GET_MATCHES_HEADER2(minLen, return 0)
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@ -535,22 +589,22 @@ static void MatchFinder_MovePos(CMatchFinder *p) { MOVE_POS; }
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#define MF_PARAMS(p) p->pos, p->buffer, p->son, p->cyclicBufferPos, p->cyclicBufferSize, p->cutValue
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#define GET_MATCHES_FOOTER(offset, maxLen) \
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offset = (UInt32)(GetMatchesSpec1(lenLimit, curMatch, MF_PARAMS(p), \
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distances + offset, maxLen) - distances); MOVE_POS_RET;
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offset = (unsigned)(GetMatchesSpec1((UInt32)lenLimit, curMatch, MF_PARAMS(p), \
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distances + offset, (UInt32)maxLen) - distances); MOVE_POS_RET;
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#define SKIP_FOOTER \
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SkipMatchesSpec(lenLimit, curMatch, MF_PARAMS(p)); MOVE_POS;
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SkipMatchesSpec((UInt32)lenLimit, curMatch, MF_PARAMS(p)); MOVE_POS;
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#define UPDATE_maxLen { \
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ptrdiff_t diff = (ptrdiff_t)0 - d2; \
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const Byte *c = cur + maxLen; \
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const Byte *lim = cur + lenLimit; \
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for (; c != lim; c++) if (*(c + diff) != *c) break; \
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maxLen = (UInt32)(c - cur); }
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maxLen = (unsigned)(c - cur); }
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static UInt32 Bt2_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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{
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UInt32 offset;
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unsigned offset;
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GET_MATCHES_HEADER(2)
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HASH2_CALC;
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curMatch = p->hash[hv];
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@ -561,7 +615,7 @@ static UInt32 Bt2_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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UInt32 Bt3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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{
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UInt32 offset;
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unsigned offset;
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GET_MATCHES_HEADER(3)
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HASH_ZIP_CALC;
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curMatch = p->hash[hv];
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@ -572,7 +626,8 @@ UInt32 Bt3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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static UInt32 Bt3_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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{
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UInt32 h2, d2, maxLen, offset, pos;
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UInt32 h2, d2, pos;
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unsigned maxLen, offset;
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UInt32 *hash;
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GET_MATCHES_HEADER(3)
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@ -594,12 +649,12 @@ static UInt32 Bt3_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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if (d2 < p->cyclicBufferSize && *(cur - d2) == *cur)
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{
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UPDATE_maxLen
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distances[0] = maxLen;
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distances[0] = (UInt32)maxLen;
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distances[1] = d2 - 1;
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offset = 2;
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if (maxLen == lenLimit)
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{
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SkipMatchesSpec(lenLimit, curMatch, MF_PARAMS(p));
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SkipMatchesSpec((UInt32)lenLimit, curMatch, MF_PARAMS(p));
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MOVE_POS_RET;
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}
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}
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@ -609,7 +664,8 @@ static UInt32 Bt3_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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static UInt32 Bt4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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{
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UInt32 h2, h3, d2, d3, maxLen, offset, pos;
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UInt32 h2, h3, d2, d3, pos;
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unsigned maxLen, offset;
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UInt32 *hash;
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GET_MATCHES_HEADER(4)
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@ -618,12 +674,12 @@ static UInt32 Bt4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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hash = p->hash;
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pos = p->pos;
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d2 = pos - hash[ h2];
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d2 = pos - hash [h2];
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d3 = pos - (hash + kFix3HashSize)[h3];
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curMatch = (hash + kFix4HashSize)[hv];
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hash[ h2] = pos;
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hash [h2] = pos;
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(hash + kFix3HashSize)[h3] = pos;
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(hash + kFix4HashSize)[hv] = pos;
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@ -632,7 +688,8 @@ static UInt32 Bt4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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if (d2 < p->cyclicBufferSize && *(cur - d2) == *cur)
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{
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distances[0] = maxLen = 2;
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maxLen = 2;
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distances[0] = 2;
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distances[1] = d2 - 1;
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offset = 2;
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}
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@ -648,10 +705,10 @@ static UInt32 Bt4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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if (offset != 0)
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{
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UPDATE_maxLen
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distances[(size_t)offset - 2] = maxLen;
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distances[(size_t)offset - 2] = (UInt32)maxLen;
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if (maxLen == lenLimit)
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{
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SkipMatchesSpec(lenLimit, curMatch, MF_PARAMS(p));
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SkipMatchesSpec((UInt32)lenLimit, curMatch, MF_PARAMS(p));
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MOVE_POS_RET;
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}
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}
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@ -674,13 +731,13 @@ static UInt32 Bt5_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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hash = p->hash;
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pos = p->pos;
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d2 = pos - hash[ h2];
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d2 = pos - hash [h2];
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d3 = pos - (hash + kFix3HashSize)[h3];
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d4 = pos - (hash + kFix4HashSize)[h4];
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curMatch = (hash + kFix5HashSize)[hv];
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hash[ h2] = pos;
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hash [h2] = pos;
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(hash + kFix3HashSize)[h3] = pos;
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(hash + kFix4HashSize)[h4] = pos;
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(hash + kFix5HashSize)[hv] = pos;
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@ -741,7 +798,8 @@ static UInt32 Bt5_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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static UInt32 Hc4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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{
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UInt32 h2, h3, d2, d3, maxLen, offset, pos;
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UInt32 h2, h3, d2, d3, pos;
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unsigned maxLen, offset;
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UInt32 *hash;
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GET_MATCHES_HEADER(4)
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@ -750,12 +808,11 @@ static UInt32 Hc4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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hash = p->hash;
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pos = p->pos;
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d2 = pos - hash[ h2];
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d2 = pos - hash [h2];
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d3 = pos - (hash + kFix3HashSize)[h3];
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curMatch = (hash + kFix4HashSize)[hv];
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hash[ h2] = pos;
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hash [h2] = pos;
|
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(hash + kFix3HashSize)[h3] = pos;
|
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|
(hash + kFix4HashSize)[hv] = pos;
|
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|
@ -764,7 +821,8 @@ static UInt32 Hc4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
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|
|
|
|
|
|
|
if (d2 < p->cyclicBufferSize && *(cur - d2) == *cur)
|
|
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|
|
{
|
|
|
|
|
distances[0] = maxLen = 2;
|
|
|
|
|
maxLen = 2;
|
|
|
|
|
distances[0] = 2;
|
|
|
|
|
distances[1] = d2 - 1;
|
|
|
|
|
offset = 2;
|
|
|
|
|
}
|
|
|
|
@ -780,7 +838,7 @@ static UInt32 Hc4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
|
|
|
|
|
if (offset != 0)
|
|
|
|
|
{
|
|
|
|
|
UPDATE_maxLen
|
|
|
|
|
distances[(size_t)offset - 2] = maxLen;
|
|
|
|
|
distances[(size_t)offset - 2] = (UInt32)maxLen;
|
|
|
|
|
if (maxLen == lenLimit)
|
|
|
|
|
{
|
|
|
|
|
p->son[p->cyclicBufferPos] = curMatch;
|
|
|
|
@ -791,7 +849,7 @@ static UInt32 Hc4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
|
|
|
|
|
if (maxLen < 3)
|
|
|
|
|
maxLen = 3;
|
|
|
|
|
|
|
|
|
|
offset = (UInt32)(Hc_GetMatchesSpec(lenLimit, curMatch, MF_PARAMS(p),
|
|
|
|
|
offset = (unsigned)(Hc_GetMatchesSpec(lenLimit, curMatch, MF_PARAMS(p),
|
|
|
|
|
distances + offset, maxLen) - (distances));
|
|
|
|
|
MOVE_POS_RET
|
|
|
|
|
}
|
|
|
|
@ -808,13 +866,13 @@ static UInt32 Hc5_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
|
|
|
|
|
hash = p->hash;
|
|
|
|
|
pos = p->pos;
|
|
|
|
|
|
|
|
|
|
d2 = pos - hash[ h2];
|
|
|
|
|
d2 = pos - hash [h2];
|
|
|
|
|
d3 = pos - (hash + kFix3HashSize)[h3];
|
|
|
|
|
d4 = pos - (hash + kFix4HashSize)[h4];
|
|
|
|
|
|
|
|
|
|
curMatch = (hash + kFix5HashSize)[hv];
|
|
|
|
|
|
|
|
|
|
hash[ h2] = pos;
|
|
|
|
|
hash [h2] = pos;
|
|
|
|
|
(hash + kFix3HashSize)[h3] = pos;
|
|
|
|
|
(hash + kFix4HashSize)[h4] = pos;
|
|
|
|
|
(hash + kFix5HashSize)[hv] = pos;
|
|
|
|
@ -877,12 +935,12 @@ static UInt32 Hc5_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
|
|
|
|
|
|
|
|
|
|
UInt32 Hc3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
|
|
|
|
|
{
|
|
|
|
|
UInt32 offset;
|
|
|
|
|
unsigned offset;
|
|
|
|
|
GET_MATCHES_HEADER(3)
|
|
|
|
|
HASH_ZIP_CALC;
|
|
|
|
|
curMatch = p->hash[hv];
|
|
|
|
|
p->hash[hv] = p->pos;
|
|
|
|
|
offset = (UInt32)(Hc_GetMatchesSpec(lenLimit, curMatch, MF_PARAMS(p),
|
|
|
|
|
offset = (unsigned)(Hc_GetMatchesSpec(lenLimit, curMatch, MF_PARAMS(p),
|
|
|
|
|
distances, 2) - (distances));
|
|
|
|
|
MOVE_POS_RET
|
|
|
|
|
}
|
|
|
|
@ -940,7 +998,7 @@ static void Bt4_MatchFinder_Skip(CMatchFinder *p, UInt32 num)
|
|
|
|
|
HASH4_CALC;
|
|
|
|
|
hash = p->hash;
|
|
|
|
|
curMatch = (hash + kFix4HashSize)[hv];
|
|
|
|
|
hash[ h2] =
|
|
|
|
|
hash [h2] =
|
|
|
|
|
(hash + kFix3HashSize)[h3] =
|
|
|
|
|
(hash + kFix4HashSize)[hv] = p->pos;
|
|
|
|
|
SKIP_FOOTER
|
|
|
|
@ -959,7 +1017,7 @@ static void Bt5_MatchFinder_Skip(CMatchFinder *p, UInt32 num)
|
|
|
|
|
HASH5_CALC;
|
|
|
|
|
hash = p->hash;
|
|
|
|
|
curMatch = (hash + kFix5HashSize)[hv];
|
|
|
|
|
hash[ h2] =
|
|
|
|
|
hash [h2] =
|
|
|
|
|
(hash + kFix3HashSize)[h3] =
|
|
|
|
|
(hash + kFix4HashSize)[h4] =
|
|
|
|
|
(hash + kFix5HashSize)[hv] = p->pos;
|
|
|
|
@ -979,7 +1037,7 @@ static void Hc4_MatchFinder_Skip(CMatchFinder *p, UInt32 num)
|
|
|
|
|
HASH4_CALC;
|
|
|
|
|
hash = p->hash;
|
|
|
|
|
curMatch = (hash + kFix4HashSize)[hv];
|
|
|
|
|
hash[ h2] =
|
|
|
|
|
hash [h2] =
|
|
|
|
|
(hash + kFix3HashSize)[h3] =
|
|
|
|
|
(hash + kFix4HashSize)[hv] = p->pos;
|
|
|
|
|
p->son[p->cyclicBufferPos] = curMatch;
|
|
|
|
@ -999,7 +1057,7 @@ static void Hc5_MatchFinder_Skip(CMatchFinder *p, UInt32 num)
|
|
|
|
|
HASH5_CALC;
|
|
|
|
|
hash = p->hash;
|
|
|
|
|
curMatch = hash + kFix5HashSize)[hv];
|
|
|
|
|
hash[ h2] =
|
|
|
|
|
hash [h2] =
|
|
|
|
|
(hash + kFix3HashSize)[h3] =
|
|
|
|
|
(hash + kFix4HashSize)[h4] =
|
|
|
|
|
(hash + kFix5HashSize)[hv] = p->pos;
|
|
|
|
|