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Update zstd to version 1.4.3

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This commit is contained in:
Tino Reichardt
2019-10-10 22:34:10 +02:00
parent 2be04003c2
commit 690d68d1d2
18 changed files with 154 additions and 96 deletions
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10
C/zstd/zstd_opt.c
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@@ -552,7 +552,6 @@ U32 ZSTD_insertBtAndGetAllMatches (
{
const ZSTD_compressionParameters* const cParams = &ms->cParams;
U32 const sufficient_len = MIN(cParams->targetLength, ZSTD_OPT_NUM -1);
U32 const maxDistance = 1U << cParams->windowLog;
const BYTE* const base = ms->window.base;
U32 const current = (U32)(ip-base);
U32 const hashLog = cParams->hashLog;
@@ -569,8 +568,7 @@ U32 ZSTD_insertBtAndGetAllMatches (
const BYTE* const dictEnd = dictBase + dictLimit;
const BYTE* const prefixStart = base + dictLimit;
U32 const btLow = (btMask >= current) ? 0 : current - btMask;
U32 const windowValid = ms->window.lowLimit;
U32 const windowLow = ((current - windowValid) > maxDistance) ? current - maxDistance : windowValid;
U32 const windowLow = ZSTD_getLowestMatchIndex(ms, current, cParams->windowLog);
U32 const matchLow = windowLow ? windowLow : 1;
U32* smallerPtr = bt + 2*(current&btMask);
U32* largerPtr = bt + 2*(current&btMask) + 1;
@@ -674,19 +672,21 @@ U32 ZSTD_insertBtAndGetAllMatches (
while (nbCompares-- && (matchIndex >= matchLow)) {
U32* const nextPtr = bt + 2*(matchIndex & btMask);
size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger); /* guaranteed minimum nb of common bytes */
const BYTE* match;
size_t matchLength = MIN(commonLengthSmaller, commonLengthLarger); /* guaranteed minimum nb of common bytes */
assert(current > matchIndex);
if ((dictMode == ZSTD_noDict) || (dictMode == ZSTD_dictMatchState) || (matchIndex+matchLength >= dictLimit)) {
assert(matchIndex+matchLength >= dictLimit); /* ensure the condition is correct when !extDict */
match = base + matchIndex;
if (matchIndex >= dictLimit) assert(memcmp(match, ip, matchLength) == 0); /* ensure early section of match is equal as expected */
matchLength += ZSTD_count(ip+matchLength, match+matchLength, iLimit);
} else {
match = dictBase + matchIndex;
assert(memcmp(match, ip, matchLength) == 0); /* ensure early section of match is equal as expected */
matchLength += ZSTD_count_2segments(ip+matchLength, match+matchLength, iLimit, dictEnd, prefixStart);
if (matchIndex+matchLength >= dictLimit)
match = base + matchIndex; /* prepare for match[matchLength] */
match = base + matchIndex; /* prepare for match[matchLength] read */
}
if (matchLength > bestLength) {