#[stable(feature = "rust1", since = "1.0.0")]
pub unsafe fn from_raw_parts<'a, T>(data: *const T, len: usize) -> &'a [T] {
debug_assert!(data as usize % mem::align_of::<T>() == 0, "attempt to create unaligned slice");
- debug_assert!(len * mem::size_of::<T>() < isize::MAX as usize,
+ let size = mem::size_of::<T>();
+ debug_assert!(size == 0 || len < (isize::MAX as usize + size - 1) / size,
"attempt to create slice covering half the address space");
Repr { raw: FatPtr { data, len } }.rust
}
#[stable(feature = "rust1", since = "1.0.0")]
pub unsafe fn from_raw_parts_mut<'a, T>(data: *mut T, len: usize) -> &'a mut [T] {
debug_assert!(data as usize % mem::align_of::<T>() == 0, "attempt to create unaligned slice");
- debug_assert!(len * mem::size_of::<T>() < isize::MAX as usize,
+ let size = mem::size_of::<T>();
+ debug_assert!(size == 0 || len < (isize::MAX as usize + size - 1) / size,
"attempt to create slice covering half the address space");
- Repr { raw: FatPtr { data, len} }.rust_mut
+ Repr { raw: FatPtr { data, len } }.rust_mut
}
/// Converts a reference to T into a slice of length 1 (without copying).