planus/impls/
offset.rs

1use crate::{builder::Builder, traits::*, Cursor, Offset};
2use core::mem::MaybeUninit;
3
4impl<T: ?Sized> Primitive for Offset<T> {
5    const ALIGNMENT: usize = 4;
6    const SIZE: usize = 4;
7}
8
9impl<T: ?Sized> WriteAsPrimitive<Offset<T>> for Offset<T> {
10    #[inline]
11    fn write<const N: usize>(&self, cursor: Cursor<'_, N>, buffer_position: u32) {
12        cursor
13            .assert_size()
14            .finish(u32::to_le_bytes(buffer_position - self.offset));
15    }
16}
17
18impl<T: ?Sized> WriteAsOffset<T> for Offset<T> {
19    fn prepare(&self, _builder: &mut Builder) -> Offset<T> {
20        *self
21    }
22}
23
24impl<T: ?Sized> WriteAs<Offset<T>> for Offset<T> {
25    type Prepared = Self;
26    #[inline]
27    fn prepare(&self, _builder: &mut Builder) -> Self {
28        *self
29    }
30}
31
32impl<T: ?Sized> WriteAsOptional<Offset<T>> for Offset<T> {
33    type Prepared = Self;
34    #[inline]
35    fn prepare(&self, _builder: &mut Builder) -> Option<Self> {
36        Some(*self)
37    }
38}
39
40impl<T: ?Sized> VectorWrite<Offset<T>> for Offset<T> {
41    const STRIDE: usize = 4;
42    type Value = Offset<T>;
43
44    #[inline]
45    fn prepare(&self, _builder: &mut Builder) -> Self::Value {
46        *self
47    }
48
49    #[inline]
50    unsafe fn write_values(
51        values: &[Offset<T>],
52        bytes: *mut MaybeUninit<u8>,
53        buffer_position: u32,
54    ) {
55        let bytes = bytes as *mut [MaybeUninit<u8>; 4];
56        for (i, v) in values.iter().enumerate() {
57            v.write(
58                Cursor::new(&mut *bytes.add(i)),
59                buffer_position - (Self::STRIDE * i) as u32,
60            );
61        }
62    }
63}
planus/impls/offset.rs

planus/impls/
offset.rs
