AuroraMiddleware/zstd
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Fix function argument to getNextMatch()

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This commit is contained in:
senhuang42 2020-09-27 20:06:44 -04:00
parent c8b8572b38
commit 9c3c7cd20e
1 changed files with 53 additions and 13 deletions
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66
lib/compress/zstd_opt.c
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@ -768,7 +768,14 @@ FORCE_INLINE_TEMPLATE U32 ZSTD_BtGetAllMatches (
* LDM util functions
*********************************/
static void ldm_skipOvershotBytes(rawSeqStore_t* rawSeqStore, size_t posOvershoot) {
/*
static void ldm_skipOvershotBytes(rawSeqStore_t* rawSeqStore, U32 bytesOvershot) {
while (bytesOvershot > 0 && rawSeqStore->pos < rawSeqStore->size) {
rawSeq seq = rawSeqStore->seq[rawSeqStore->pos];
if (bytesOvershot <= seq.litLength) {
seq->litLength -= bytesOvershot;
}
}
if (rawSeqStore->seq[rawSeqStore->pos].matchLength > posOvershoot) {
rawSeqStore->seq[rawSeqStore->pos].matchLength -= posOvershoot;
return;
@ -780,14 +787,17 @@ static void ldm_skipOvershotBytes(rawSeqStore_t* rawSeqStore, size_t posOvershoo
while (posOvershoot > 0 && rawSeqStore->pos < rawSeqStore->size) {
}
}
}*/
static void ldm_skipSequences(rawSeqStore_t* rawSeqStore, size_t srcSize, U32 const minMatch) {
while (srcSize > 0 && rawSeqStore->pos < rawSeqStore->size) {
printf("ldm_skipSequences(): %u remaining\n", srcSize);
rawSeq* seq = rawSeqStore->seq + rawSeqStore->pos;
printf("ldm_skipSequences(): before: (of: %u, ml: %u, ll: %u)\n", seq->offset, seq->matchLength, seq->litLength);
if (srcSize <= seq->litLength) {
/* Skip past srcSize literals */
seq->litLength -= (U32)srcSize;
printf("ldm_skipSequences(): final: (of: %u, ml: %u, ll: %u)\n", seq->offset, seq->matchLength, seq->litLength);
return;
}
srcSize -= seq->litLength;
@ -804,6 +814,7 @@ static void ldm_skipSequences(rawSeqStore_t* rawSeqStore, size_t srcSize, U32 co
}
rawSeqStore->pos++;
}
printf("ldm_skipSequences(): final: (of: %u, ml: %u, ll: %u)\n", seq->offset, seq->matchLength, seq->litLength);
return;
}
srcSize -= seq->matchLength;
@ -874,17 +885,46 @@ static void ldm_maybeAddLdm(ZSTD_match_t* matches, U32* nbMatches,
if (posDiff > 0)
return; // dont deal with extra ldms for now
assert(posDiff < matchEndPosInBlock - matchStartPosInBlock);
U32 matchLengthAdjusted = matchEndPosInBlock - matchStartPosInBlock - posDiff;
U32 matchOffsetAdjusted = matchOffset + posDiff;
U32 candidateMatchLength = matchEndPosInBlock - matchStartPosInBlock - posDiff;
U32 candidateOffCode = matchOffset + posDiff + ZSTD_REP_MOVE;
if (*nbMatches == 0 || matchLengthAdjusted >= matches[*nbMatches-1].len) {
printf("Adding LDM with of: %u, ml: %u @ currposinblock: %u, current: %u, currposinblock+sbi: %u\n", matchOffsetAdjusted, matchLengthAdjusted, currPosInBlock, curr, currPosInBlock+sbi);
/* Add sifting */
matches[*nbMatches].len = matchLengthAdjusted;
matches[*nbMatches].off = matchOffsetAdjusted + ZSTD_REP_MOVE;
(*nbMatches)++;
} else {
printf("too small ldm\n");
if ((*nbMatches == 0 || candidateMatchLength >= matches[*nbMatches-1].len) && *nbMatches < ZSTD_OPT_NUM) {
printf("large enough, adding\n");
/*matches[*nbMatches].len = candidateMatchLength;
matches[*nbMatches].off = candidateOffCode;
(*nbMatches)++;*/
if (*nbMatches == 0) {
matches[*nbMatches].len = candidateMatchLength;
matches[*nbMatches].off = candidateOffCode;
(*nbMatches)++;
} else {
if (candidateMatchLength == matches[*nbMatches-1].len) {
U32 candidateMatchIdx = *nbMatches;
matches[*nbMatches].len = candidateMatchLength;
matches[*nbMatches].off = candidateOffCode;
printf("Sifting...: idx: %u, len: %u, off: %u\n", candidateMatchIdx, candidateMatchLength, candidateOffCode);
//printf("Current best is...: idx: %u, len: %u, off: %u\n", *nbMatches-1, matches[*nbMatches-1].len, matches[*nbMatches-1].off);
if (candidateOffCode != matches[*nbMatches].off)
printf("DIFF: ldm: (len: %u, off: %u), best: (len: %u, off: %u)\n", candidateMatchLength, candidateOffCode, matches[*nbMatches-1].len, matches[*nbMatches-1].off);
//printf("Current best is...: idx: %u, len: %u, off: %u\n", *nbMatches-1, matches[*nbMatches-1].len, matches[*nbMatches-1].off);
while (candidateMatchIdx > 0 &&
matches[candidateMatchIdx].off > matches[candidateMatchIdx - 1].off &&
matches[candidateMatchIdx].len == matches[candidateMatchIdx - 1].len) {
//printf("Compared to: idx: %u, len: %u, off: %u", candidateMatchIdx - 1, matches[candidateMatchIdx - 1].len, matches[candidateMatchIdx - 1].off);
ZSTD_match_t tmp = matches[candidateMatchIdx - 1];
matches[candidateMatchIdx - 1] = matches[candidateMatchIdx];
matches[candidateMatchIdx] = tmp;
--candidateMatchIdx;
}
(*nbMatches)++;
} else {
printf("MATCHDIFF: ldm: (len: %u, off: %u), best: (len: %u, off: %u)\n", candidateMatchLength, candidateOffCode, matches[*nbMatches-1].len, matches[*nbMatches-1].off);
matches[*nbMatches].len = candidateMatchLength;
matches[*nbMatches].off = candidateOffCode;
(*nbMatches)++;
}
}
}
}
@ -900,7 +940,7 @@ static void ldm_handleLdm(rawSeqStore_t* ldmSeqStore, ZSTD_match_t* matches, U32
ldm_skipSequences(ldmSeqStore, posOvershoot, MINMATCH);
int noMoreLdms = ldm_getNextMatch(ldmSeqStore, matchStartPosInBlock,
matchEndPosInBlock, matchOffset,
matchEndPosInBlock, remainingBytes, sbi);
currPosInBlock, remainingBytes, sbi);
} else {
int noMoreLdms = ldm_getNextMatch(ldmSeqStore, matchStartPosInBlock,
matchEndPosInBlock, matchOffset,