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lib/compress: created ZSTD_LLcode() and ZSTD_MLcode()

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transform length into code.
Since transformation is needed in several places throughout the code,
better write the logic in one place.
This commit is contained in:
Yann Collet
2017-11-08 12:33:06 -08:00
parent 5aa0352742
commit 100d8ad6be
3 changed files with 40 additions and 33 deletions
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6
lib/compress/zstd_compress.c
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@ -1248,8 +1248,6 @@ static size_t ZSTD_compressLiterals (ZSTD_entropyCTables_t * entropy,
void ZSTD_seqToCodes(const seqStore_t* seqStorePtr)
{
BYTE const LL_deltaCode = 19;
BYTE const ML_deltaCode = 36;
const seqDef* const sequences = seqStorePtr->sequencesStart;
BYTE* const llCodeTable = seqStorePtr->llCode;
BYTE* const ofCodeTable = seqStorePtr->ofCode;
@ -1259,9 +1257,9 @@ void ZSTD_seqToCodes(const seqStore_t* seqStorePtr)
for (u=0; u<nbSeq; u++) {
U32 const llv = sequences[u].litLength;
U32 const mlv = sequences[u].matchLength;
llCodeTable[u] = (llv> 63) ? (BYTE)ZSTD_highbit32(llv) + LL_deltaCode : LL_Code[llv];
llCodeTable[u] = (BYTE)ZSTD_LLcode(llv);
ofCodeTable[u] = (BYTE)ZSTD_highbit32(sequences[u].offset);
mlCodeTable[u] = (mlv>127) ? (BYTE)ZSTD_highbit32(mlv) + ML_deltaCode : ML_Code[mlv];
mlCodeTable[u] = (BYTE)ZSTD_MLcode(mlv);
}
if (seqStorePtr->longLengthID==1)
llCodeTable[seqStorePtr->longLengthPos] = MaxLL;