ddidderr/zstd-rs
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fixed 32-bits compatibility

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This commit is contained in:
Yann Collet
2016-03-26 17:18:11 +01:00
parent a5b66e34c7
commit b9151406de
3 changed files with 37 additions and 28 deletions
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lib/zstd_decompress.c
+14 -11
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@@ -637,8 +637,6 @@ static void ZSTD_decodeSequence(seq_t* seq, seqState_t* seqState, const U32 mls)
U32 const ofBits = ofCode;
U32 const totalBits = llBits+mlBits+ofBits;
//size_t const allBits = BIT_readBits(&(seqState->DStream), totalBits);
static const U32 LL_base[MaxLL+1] = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 18, 20, 22, 24, 28, 32, 40, 48, 64, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000,
@@ -657,20 +655,25 @@ static void ZSTD_decodeSequence(seq_t* seq, seqState_t* seqState, const U32 mls)
0xFFFFFF, 0x1FFFFFF, 0x3FFFFFF, /*fake*/ 1, 1, 1, 1, 1 };
/* sequence */
{ size_t const offset = ofCode ? OF_base[ofCode] + BIT_readBits(&(seqState->DStream), ofBits) :
{ size_t const offset = ofCode ? OF_base[ofCode] + BIT_readBits(&(seqState->DStream), ofBits) : /* <= 26 bits */
llCode ? seq->offset : seqState->prevOffset;
if (MEM_32bits()) BIT_reloadDStream(&(seqState->DStream));
if (ofCode | !llCode) seqState->prevOffset = seq->offset; /* cmove */
seq->offset = offset;
}
seq->matchLength = ML_base[mlCode] + mls + ((mlCode>31) ? BIT_readBits(&(seqState->DStream), mlBits) : 0);
seq->litLength = LL_base[llCode] + ((llCode>15) ? BIT_readBits(&(seqState->DStream), llBits) : 0);
if (totalBits > 64 - 7 - (LLFSELog+MLFSELog+OffFSELog)) BIT_reloadDStream(&(seqState->DStream));
seq->matchLength = ML_base[mlCode] + mls + ((mlCode>31) ? BIT_readBits(&(seqState->DStream), mlBits) : 0); /* <= 16 bits */
if (MEM_32bits() && (mlBits+llBits>24)) BIT_reloadDStream(&(seqState->DStream));
seq->litLength = LL_base[llCode] + ((llCode>15) ? BIT_readBits(&(seqState->DStream), llBits) : 0); /* <= 16 bits */
if (MEM_32bits() ||
(totalBits > 64 - 7 - (LLFSELog+MLFSELog+OffFSELog)) ) BIT_reloadDStream(&(seqState->DStream));
/* ANS state update */
FSE_updateState(&(seqState->stateLL), &(seqState->DStream));
FSE_updateState(&(seqState->stateML), &(seqState->DStream));
FSE_updateState(&(seqState->stateOffb), &(seqState->DStream));
FSE_updateState(&(seqState->stateLL), &(seqState->DStream)); /* <= 9 bits */
FSE_updateState(&(seqState->stateML), &(seqState->DStream)); /* <= 9 bits */
if (MEM_32bits()) BIT_reloadDStream(&(seqState->DStream)); /* <= 18 bits */
FSE_updateState(&(seqState->stateOffb), &(seqState->DStream)); /* <= 8 bits */
}
@@ -795,8 +798,8 @@ static size_t ZSTD_decompressSequences(
ZSTD_decodeSequence(&sequence, &seqState, mls);
#if 0 /* for debug */
{ U32 pos = (U32)(op-base);
if ((pos > 15181500) && (pos < 15183150))
printf("Dpos %6u : %3u literals & match %3u bytes at distance %6u \n",
if ((pos > 200802300) && (pos < 200802400))
printf("Dpos %6u :%5u literals & match %3u bytes at distance %6u \n",
pos, (U32)sequence.litLength, (U32)sequence.matchLength, (U32)sequence.offset);
}
#endif