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use crate::{codec::error::Error, context::Context};
use std::{io::Write, sync::Arc};
macro_rules! impl_encode {
($t: ty) => {
impl Encode for $t {
fn encode(&self, buffer: &mut dyn Write, _: &dyn Context) -> Result<usize, Error> {
let size = buffer.write(&self.to_be_bytes())?;
Ok(size)
}
}
};
}
pub trait Encode {
fn encode(&self, buffer: &mut dyn Write, ctx: &dyn Context) -> Result<usize, Error>;
}
impl Encode for bool {
fn encode(&self, buffer: &mut dyn Write, _: &dyn Context) -> Result<usize, Error> {
let size = buffer.write(&[*self as u8])?;
Ok(size)
}
}
impl<T: Encode> Encode for Option<T> {
fn encode(&self, buffer: &mut dyn Write, ctx: &dyn Context) -> Result<usize, Error> {
match self {
Some(val) => {
let mut size = 1u8.encode(buffer, ctx)?;
size += val.encode(buffer, ctx)?;
Ok(size)
}
None => 0u8.encode(buffer, ctx),
}
}
}
impl<T: Encode> Encode for Vec<T> {
fn encode(&self, buffer: &mut dyn Write, ctx: &dyn Context) -> Result<usize, Error> {
let mut size = self.len().encode(buffer, ctx)?;
for item in self {
size += item.encode(buffer, ctx)?;
}
Ok(size)
}
}
impl Encode for String {
fn encode(&self, buffer: &mut dyn Write, _: &dyn Context) -> Result<usize, Error> {
let utf8 = self.as_bytes();
buffer.write_all(utf8)?;
Ok(utf8.len())
}
}
impl Encode for Arc<[u8]> {
fn encode(&self, buffer: &mut dyn Write, _: &dyn Context) -> Result<usize, Error> {
let len = buffer.write(self)?;
Ok(len)
}
}
impl<const S: usize> Encode for [u8; S] {
fn encode(&self, buffer: &mut dyn Write, _ctx: &dyn Context) -> Result<usize, Error> {
let len = buffer.write(self)?;
Ok(len)
}
}
impl_encode!(u8);
impl_encode!(u16);
impl_encode!(u32);
impl_encode!(u64);
impl_encode!(u128);
impl_encode!(usize);
impl_encode!(i8);
impl_encode!(i16);
impl_encode!(i32);
impl_encode!(i64);
impl_encode!(i128);
impl_encode!(isize);
impl_encode!(f32);
impl_encode!(f64);
impl<T> Encode for T
where
T: AsRef<dyn Encode>,
{
fn encode(&self, buffer: &mut dyn Write, ctx: &dyn Context) -> Result<usize, Error> {
self.as_ref().encode(buffer, ctx)
}
}
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