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use crate::{
top_decode_from_nested_or_handle_err, DecodeError, DecodeErrorHandler, EncodeErrorHandler,
NestedDecode, NestedDecodeInput, NestedEncode, NestedEncodeOutput, TopDecode, TopDecodeInput,
TopEncode, TopEncodeOutput,
};
use alloc::boxed::Box;
use arrayvec::ArrayVec;
impl<T: NestedEncode, const N: usize> NestedEncode for [T; N] {
#[inline]
fn dep_encode_or_handle_err<O, H>(&self, dest: &mut O, h: H) -> Result<(), H::HandledErr>
where
O: NestedEncodeOutput,
H: EncodeErrorHandler,
{
super::impl_slice::dep_encode_slice_contents(&self[..], dest, h)
}
}
impl<T: NestedEncode, const N: usize> TopEncode for [T; N] {
#[inline]
fn top_encode_or_handle_err<O, H>(&self, output: O, h: H) -> Result<(), H::HandledErr>
where
O: TopEncodeOutput,
H: EncodeErrorHandler,
{
(&self[..]).top_encode_or_handle_err(output, h)
}
}
impl<T: NestedDecode, const N: usize> NestedDecode for [T; N] {
#[allow(clippy::reversed_empty_ranges)]
fn dep_decode_or_handle_err<I, H>(input: &mut I, h: H) -> Result<Self, H::HandledErr>
where
I: NestedDecodeInput,
H: DecodeErrorHandler,
{
let mut r = ArrayVec::new();
for _ in 0..N {
r.push(T::dep_decode_or_handle_err(input, h)?);
}
let i = r.into_inner();
match i {
Ok(a) => Ok(a),
Err(_) => Err(h.handle_error(DecodeError::ARRAY_DECODE_ERROR)),
}
}
}
impl<T: NestedDecode, const N: usize> TopDecode for [T; N] {
fn top_decode_or_handle_err<I, H>(input: I, h: H) -> Result<Self, H::HandledErr>
where
I: TopDecodeInput,
H: DecodeErrorHandler,
{
top_decode_from_nested_or_handle_err(input, h)
}
fn top_decode_boxed_or_handle_err<I, H>(input: I, h: H) -> Result<Box<Self>, H::HandledErr>
where
I: TopDecodeInput,
H: DecodeErrorHandler,
{
T::if_u8(
input,
|input| {
let bs = input.into_boxed_slice_u8();
if bs.len() != N {
return Err(h.handle_error(DecodeError::ARRAY_DECODE_ERROR));
}
let raw = Box::into_raw(bs);
let array_box = unsafe { Box::<[T; N]>::from_raw(raw as *mut [T; N]) };
Ok(array_box)
},
|input| Ok(Box::new(Self::top_decode_or_handle_err(input, h)?)),
)
}
}
#[cfg(test)]
mod tests {
use crate::test_util::check_top_encode;
use super::*;
use alloc::vec::Vec;
#[test]
fn test_array_16384() {
let arr = [7i32; 16384];
let mut expected_bytes = Vec::<u8>::with_capacity(16384 * 4);
for _ in 0..16384 {
expected_bytes.push(0);
expected_bytes.push(0);
expected_bytes.push(0);
expected_bytes.push(7);
}
let serialized_bytes = check_top_encode(&arr);
assert_eq!(serialized_bytes, expected_bytes);
let deserialized = <[i32; 16384]>::top_decode(&serialized_bytes[..]).unwrap();
for byte in deserialized {
assert_eq!(byte, 7i32);
}
}
}