in lz4.cpp [2504:2510]
static int LZ4_decompress_safe_withSmallPrefix(const char* source, char* dest, int compressedSize, int maxOutputSize,
size_t prefixSize)
{
return LZ4_decompress_generic(source, dest, compressedSize, maxOutputSize,
decode_full_block, noDict,
(BYTE*)dest-prefixSize, NULL, 0);
}