planus/impls/
primitives.rs

1use crate::{
2    builder::Builder, errors::ErrorKind, slice_helpers::SliceWithStartOffset, traits::*, Cursor,
3};
4use core::mem::MaybeUninit;
5
6macro_rules! gen_primitive_types {
7    ($ty:ty, $size:expr) => {
8        impl Primitive for $ty {
9            const ALIGNMENT: usize = $size;
10            const SIZE: usize = $size;
11        }
12
13        impl WriteAsPrimitive<$ty> for $ty {
14            #[inline]
15            fn write<const N: usize>(&self, cursor: Cursor<'_, N>, _buffer_position: u32) {
16                cursor.assert_size().finish(self.to_le_bytes());
17            }
18        }
19
20        impl WriteAs<$ty> for $ty {
21            type Prepared = Self;
22            #[inline]
23            fn prepare(&self, _builder: &mut Builder) -> Self {
24                *self
25            }
26        }
27
28        impl WriteAsDefault<$ty, $ty> for $ty {
29            type Prepared = Self;
30            #[inline]
31            fn prepare(&self, _builder: &mut Builder, default: &$ty) -> Option<Self> {
32                #[allow(clippy::float_cmp)]
33                if self == default {
34                    None
35                } else {
36                    Some(*self)
37                }
38            }
39        }
40
41        impl WriteAsOptional<$ty> for $ty {
42            type Prepared = Self;
43            #[inline]
44            fn prepare(&self, _builder: &mut Builder) -> Option<Self> {
45                Some(*self)
46            }
47        }
48
49        impl<'buf> TableRead<'buf> for $ty {
50            #[inline]
51            fn from_buffer(
52                buffer: SliceWithStartOffset<'buf>,
53                offset: usize,
54            ) -> core::result::Result<$ty, ErrorKind> {
55                let buffer = buffer.advance_as_array(offset)?.as_array();
56                Ok(<$ty>::from_le_bytes(*buffer))
57            }
58        }
59
60        impl<'buf> VectorRead<'buf> for $ty {
61            const STRIDE: usize = $size;
62            #[inline]
63            unsafe fn from_buffer(buffer: SliceWithStartOffset<'buf>, offset: usize) -> $ty {
64                let buffer = buffer.unchecked_advance_as_array(offset).as_array();
65                <$ty>::from_le_bytes(*buffer)
66            }
67        }
68
69        impl VectorWrite<$ty> for $ty {
70            const STRIDE: usize = $size;
71            type Value = $ty;
72            #[inline]
73            fn prepare(&self, _builder: &mut Builder) -> Self::Value {
74                *self
75            }
76
77            #[inline]
78            unsafe fn write_values(
79                values: &[$ty],
80                bytes: *mut MaybeUninit<u8>,
81                buffer_position: u32,
82            ) {
83                let bytes = bytes as *mut [MaybeUninit<u8>; $size];
84                for (i, v) in values.iter().enumerate() {
85                    v.write(
86                        Cursor::new(&mut *bytes.add(i)),
87                        buffer_position - ($size * i) as u32,
88                    );
89                }
90            }
91        }
92    };
93}
94
95gen_primitive_types!(i8, 1);
96gen_primitive_types!(u8, 1);
97gen_primitive_types!(i16, 2);
98gen_primitive_types!(u16, 2);
99gen_primitive_types!(i32, 4);
100gen_primitive_types!(u32, 4);
101gen_primitive_types!(i64, 8);
102gen_primitive_types!(u64, 8);
103gen_primitive_types!(f32, 4);
104gen_primitive_types!(f64, 8);
planus/impls/primitives.rs

planus/impls/
primitives.rs
