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added comment about minimum size of FSE tables

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required for DDict creation,
which use this space as workspace during Hufman table building stage.
This commit is contained in:
Yann Collet
2018-09-10 11:24:17 -07:00
parent f97ca36eab
commit 3675ef4762
1 changed files with 3 additions and 3 deletions
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lib/decompress/zstd_decompress.c
+3 -3
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@@ -110,9 +110,9 @@ typedef struct {
#define SEQSYMBOL_TABLE_SIZE(log) (1 + (1 << (log))) #define SEQSYMBOL_TABLE_SIZE(log) (1 + (1 << (log)))
typedef struct { typedef struct {
ZSTD_seqSymbol LLTable[SEQSYMBOL_TABLE_SIZE(LLFSELog)]; ZSTD_seqSymbol LLTable[SEQSYMBOL_TABLE_SIZE(LLFSELog)]; /* Note : Space reserved for FSE Tables */
ZSTD_seqSymbol OFTable[SEQSYMBOL_TABLE_SIZE(OffFSELog)]; ZSTD_seqSymbol OFTable[SEQSYMBOL_TABLE_SIZE(OffFSELog)]; /* is also used as temporary workspace while building hufTable during DDict creation */
ZSTD_seqSymbol MLTable[SEQSYMBOL_TABLE_SIZE(MLFSELog)]; ZSTD_seqSymbol MLTable[SEQSYMBOL_TABLE_SIZE(MLFSELog)]; /* and therefore must be at least HUF_DECOMPRESS_WORKSPACE_SIZE large */
HUF_DTable hufTable[HUF_DTABLE_SIZE(HufLog)]; /* can accommodate HUF_decompress4X */ HUF_DTable hufTable[HUF_DTABLE_SIZE(HufLog)]; /* can accommodate HUF_decompress4X */
U32 rep[ZSTD_REP_NUM]; U32 rep[ZSTD_REP_NUM];
} ZSTD_entropyDTables_t; } ZSTD_entropyDTables_t;