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authorYann Collet <cyan@fb.com>2018-04-27 19:46:49 (GMT)
committerYann Collet <cyan@fb.com>2018-04-27 19:46:49 (GMT)
commit19b1267d44a6bd3fbb1b682d515a3ab5dc70ec50 (patch)
tree3526f87ecfba3663d2df43cbc2787d32c0a76e53 /lib
parent72e99c8939d7f005487403ab54fa65ac31ee4317 (diff)
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fix lz4hc -BD non-determinism
related to chain table update
Diffstat (limited to 'lib')
-rw-r--r--lib/lz4hc.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/lib/lz4hc.c b/lib/lz4hc.c
index 0778552..184ca8c 100644
--- a/lib/lz4hc.c
+++ b/lib/lz4hc.c
@@ -699,8 +699,6 @@ LZ4_FORCE_INLINE int LZ4HC_compress_generic_internal (
ctx->end += *srcSizePtr;
if (cLevel < 1) cLevel = LZ4HC_CLEVEL_DEFAULT; /* note : convention is different from lz4frame, maybe something to review */
cLevel = MIN(LZ4HC_CLEVEL_MAX, cLevel);
- assert(cLevel >= 0);
- assert(cLevel <= LZ4HC_CLEVEL_MAX);
{ cParams_t const cParam = clTable[cLevel];
if (cParam.strat == lz4hc)
return LZ4HC_compress_hashChain(ctx,
@@ -892,7 +890,8 @@ void LZ4_attach_HC_dictionary(LZ4_streamHC_t *working_stream, const LZ4_streamHC
static void LZ4HC_setExternalDict(LZ4HC_CCtx_internal* ctxPtr, const BYTE* newBlock)
{
DEBUGLOG(4, "LZ4HC_setExternalDict(%p, %p)", ctxPtr, newBlock);
- if (ctxPtr->end >= ctxPtr->base + 4) LZ4HC_Insert (ctxPtr, ctxPtr->end-3); /* Referencing remaining dictionary content */
+ if (ctxPtr->end >= ctxPtr->base + ctxPtr->dictLimit + 4)
+ LZ4HC_Insert (ctxPtr, ctxPtr->end-3); /* Referencing remaining dictionary content */
/* Only one memory segment for extDict, so any previous extDict is lost at this stage */
ctxPtr->lowLimit = ctxPtr->dictLimit;