Function read_from_bytes

crates/table/src/row_hash.rs:219–227

Read a `T` from `bytes` at the `curr_offset` and advance by `size` bytes. # Safety Let `value = &bytes[range_move(0..size_of:: (), *curr_offset)]`. Then `value` must point to a valid `T` and must be properly aligned for `T`.

(bytes: &Bytes, curr_offset: &mut usize)

/// Let `value = &bytes[range_move(0..size_of::<T>(), *curr_offset)]`.
/// Then `value` must point to a valid `T` and must be properly aligned for `T`.
pub unsafe fn read_from_bytes<T: Copy>(bytes: &Bytes, curr_offset: &mut usize) -> T {
    let bytes = &bytes[*curr_offset..];
    *curr_offset += mem::size_of::<T>();
    // TODO: Endianness concerns? Do we need to explicitly read as little-endian here?
    let ptr: *const T = bytes.as_ptr().cast();
    // SAFETY: Caller promised that `ptr` points to a `T`.
    // Moreover, `ptr` is derived from a shared reference with permission to read this range.
    unsafe { *ptr }
}

#[cfg(test)]
mod tests {