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fixed memcpy() on NULL warning

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memcpy(NULL, src, 0) is undefined behavior.
This commit is contained in:
Yann Collet
2018-10-29 13:57:37 -07:00
parent 8d56f4baee
commit 9c58098200
1 changed files with 4 additions and 1 deletions
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lib/decompress/zstd_decompress.c
+4 -1
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@@ -508,7 +508,10 @@ static size_t ZSTD_copyRawBlock(void* dst, size_t dstCapacity,
const void* src, size_t srcSize) const void* src, size_t srcSize)
{ {
DEBUGLOG(5, "ZSTD_copyRawBlock"); DEBUGLOG(5, "ZSTD_copyRawBlock");
if (dst == NULL) dstCapacity = 0; /* better safe than sorry */ if (dst == NULL) {
if (srcSize == 0) return 0;
return ERROR(dstSize_tooSmall);
}
if (srcSize > dstCapacity) return ERROR(dstSize_tooSmall); if (srcSize > dstCapacity) return ERROR(dstSize_tooSmall);
memcpy(dst, src, srcSize); memcpy(dst, src, srcSize);
return srcSize; return srcSize;