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use std::cmp::max;
use std::mem::{align_of, size_of};
use crate::endian_scalar::emplace_scalar;
pub trait Push: Sized {
type Output;
fn push(&self, dst: &mut [u8], _rest: &[u8]);
#[inline]
fn size() -> usize {
size_of::<Self::Output>()
}
#[inline]
fn alignment() -> PushAlignment {
PushAlignment::new(align_of::<Self::Output>())
}
}
pub struct PushAlignment(usize);
impl PushAlignment {
#[inline]
pub fn new(x: usize) -> Self {
PushAlignment { 0: x }
}
#[inline]
pub fn value(&self) -> usize {
self.0
}
#[inline]
pub fn max_of(&self, o: usize) -> Self {
PushAlignment::new(max(self.0, o))
}
}
macro_rules! impl_push_for_endian_scalar {
($ty:ident) => {
impl Push for $ty {
type Output = $ty;
#[inline]
fn push(&self, dst: &mut [u8], _rest: &[u8]) {
emplace_scalar::<$ty>(dst, *self);
}
}
};
}
impl_push_for_endian_scalar!(bool);
impl_push_for_endian_scalar!(u8);
impl_push_for_endian_scalar!(i8);
impl_push_for_endian_scalar!(u16);
impl_push_for_endian_scalar!(i16);
impl_push_for_endian_scalar!(u32);
impl_push_for_endian_scalar!(i32);
impl_push_for_endian_scalar!(u64);
impl_push_for_endian_scalar!(i64);
impl_push_for_endian_scalar!(f32);
impl_push_for_endian_scalar!(f64);