diff --git a/src/AbstractDiskWriter.cc b/src/AbstractDiskWriter.cc index df2d0a85..9e3dac4b 100644 --- a/src/AbstractDiskWriter.cc +++ b/src/AbstractDiskWriter.cc @@ -373,8 +373,7 @@ void AbstractDiskWriter::ensureMmapWrite(size_t len, int64_t offset) return; } - uint32_t filesize_lo = filesize & 0xffffffffu; - if (sizeof(off_t) > sizeof(size_t) && (filesize_lo) > 0) { + if (static_cast(std::numeric_limits::max()) < static_cast(filesize)) { // filesize could overflow in 32bit OS with 64bit off_t type // the filesize will be truncated if provided as a 32bit size_t enableMmap_ = false;