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Merge pull request #2931 from facebook/fix_rowlog

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fixed incorrect rowlog initialization
This commit is contained in:
Yann Collet
2021-12-16 09:48:12 -08:00
committed by GitHub
parent 5c63096269 c8d6067615
commit 5c96146db3
1 changed files with 10 additions and 11 deletions
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lib/compress/zstd_lazy.c
+10 -11
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@@ -1440,8 +1440,15 @@ ZSTD_FOR_EACH_DICT_MODE(ZSTD_FOR_EACH_MLS, GEN_ZSTD_HC_VTABLE)
*********************************/
typedef enum { search_hashChain=0, search_binaryTree=1, search_rowHash=2 } searchMethod_e;
/**
* This table is indexed first by the four ZSTD_dictMode_e values, and then
* by the two searchMethod_e values. NULLs are placed for configurations
* that should never occur (extDict modes go to the other implementation
* below and there is no DDSS for binary tree search yet).
*/
static ZSTD_LazyVTable const* ZSTD_selectLazyVTable(ZSTD_matchState_t const* ms, searchMethod_e searchMethod, ZSTD_dictMode_e dictMode)
static ZSTD_LazyVTable const*
ZSTD_selectLazyVTable(ZSTD_matchState_t const* ms, searchMethod_e searchMethod, ZSTD_dictMode_e dictMode)
{
/* Fill the Hc/Bt VTable arrays with the right functions for the (dictMode, mls) combination. */
ZSTD_LazyVTable const* const hcVTables[4][3] = GEN_ZSTD_VTABLE_ARRAY(GEN_ZSTD_HC_VTABLE_ARRAY);
@@ -1475,19 +1482,10 @@ ZSTD_compressBlock_lazy_generic(
const BYTE* ip = istart;
const BYTE* anchor = istart;
const BYTE* const iend = istart + srcSize;
const BYTE* const ilimit = searchMethod == search_rowHash ? iend - 8 - ZSTD_ROW_HASH_CACHE_SIZE : iend - 8;
const BYTE* const ilimit = (searchMethod == search_rowHash) ? iend - 8 - ZSTD_ROW_HASH_CACHE_SIZE : iend - 8;
const BYTE* const base = ms->window.base;
const U32 prefixLowestIndex = ms->window.dictLimit;
const BYTE* const prefixLowest = base + prefixLowestIndex;
const U32 rowLog = ms->cParams.searchLog < 5 ? 4 : 5;
/**
* This table is indexed first by the four ZSTD_dictMode_e values, and then
* by the two searchMethod_e values. NULLs are placed for configurations
* that should never occur (extDict modes go to the other implementation
* below and there is no DDSS for binary tree search yet).
*/
searchMax_f const searchMax = ZSTD_selectLazyVTable(ms, searchMethod, dictMode)->searchMax;
U32 offset_1 = rep[0], offset_2 = rep[1], savedOffset=0;
@@ -1524,6 +1522,7 @@ ZSTD_compressBlock_lazy_generic(
}
if (searchMethod == search_rowHash) {
const U32 rowLog = MAX(4, MIN(6, ms->cParams.searchLog));
ZSTD_row_fillHashCache(ms, base, rowLog,
MIN(ms->cParams.minMatch, 6 /* mls caps out at 6 */),
ms->nextToUpdate, ilimit);