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fixed wrong assertion

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base can actually overflow
This commit is contained in:
Yann Collet 2018-05-10 19:48:09 -07:00
parent 0d7626672d
commit 99ddca43a6
1 changed files with 0 additions and 1 deletions
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lib/compress/zstd_compress.c
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@ -2003,7 +2003,6 @@ static size_t ZSTD_compressBlock_internal(ZSTD_CCtx* zc,
{ const BYTE* const base = ms->window.base;
const BYTE* const istart = (const BYTE*)src;
const U32 current = (U32)(istart-base);
assert(istart >= base);
if (sizeof(ptrdiff_t)==8) assert(istart - base < (ptrdiff_t)(U32)(-1)); /* ensure no overflow */
if (current > ms->nextToUpdate + 384)
ms->nextToUpdate = current - MIN(192, (U32)(current - ms->nextToUpdate - 384));