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// Copyright (C) 2023 Parity Technologies (UK) Ltd. (admin@parity.io)
// This file is a part of the scale-decode crate.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use super::BasicVisitor;
use crate::{
error::Error,
visitor::{decode_with_visitor, DecodeAsTypeResult, Visitor},
IntoVisitor,
};
use primitive_types::{H128, H160, H256, H384, H512, H768};
macro_rules! impl_visitor {
($ty:ty: $len:literal) => {
impl Visitor for BasicVisitor<$ty> {
type Error = Error;
type Value<'scale, 'info> = $ty;
fn unchecked_decode_as_type<'scale, 'info>(
self,
input: &mut &'scale [u8],
type_id: crate::visitor::TypeId,
types: &'info scale_info::PortableRegistry,
) -> crate::visitor::DecodeAsTypeResult<
Self,
Result<Self::Value<'scale, 'info>, Self::Error>,
> {
let res = decode_with_visitor(
input,
type_id.0,
types,
BasicVisitor::<[u8; $len / 8]> { _marker: core::marker::PhantomData },
)
.map(|res| <$ty>::from(res));
DecodeAsTypeResult::Decoded(res)
}
}
impl IntoVisitor for $ty {
type Visitor = BasicVisitor<$ty>;
fn into_visitor() -> Self::Visitor {
BasicVisitor { _marker: core::marker::PhantomData }
}
}
};
}
impl_visitor!(H128: 128);
impl_visitor!(H160: 160);
impl_visitor!(H256: 256);
impl_visitor!(H384: 384);
impl_visitor!(H512: 512);
impl_visitor!(H768: 768);