mirror of
https://github.com/fluencelabs/rust-libp2p
synced 2025-05-11 18:37:13 +00:00
111 lines
4.0 KiB
Rust
111 lines
4.0 KiB
Rust
// Copyright 2018 Parity Technologies (UK) Ltd.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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use crate::{
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either::{EitherOutput, EitherError, EitherFuture2, EitherName},
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upgrade::{InboundUpgrade, OutboundUpgrade, UpgradeInfo}
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};
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/// A type to represent two possible upgrade types (inbound or outbound).
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#[derive(Debug, Clone)]
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pub enum EitherUpgrade<A, B> { A(A), B(B) }
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impl<A, B> UpgradeInfo for EitherUpgrade<A, B>
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where
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A: UpgradeInfo,
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B: UpgradeInfo
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{
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type Info = EitherName<A::Info, B::Info>;
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type InfoIter = EitherIter<
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<A::InfoIter as IntoIterator>::IntoIter,
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<B::InfoIter as IntoIterator>::IntoIter
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>;
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fn protocol_info(&self) -> Self::InfoIter {
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match self {
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EitherUpgrade::A(a) => EitherIter::A(a.protocol_info().into_iter()),
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EitherUpgrade::B(b) => EitherIter::B(b.protocol_info().into_iter())
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}
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}
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}
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impl<C, A, B, TA, TB, EA, EB> InboundUpgrade<C> for EitherUpgrade<A, B>
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where
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A: InboundUpgrade<C, Output = TA, Error = EA>,
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B: InboundUpgrade<C, Output = TB, Error = EB>,
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{
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type Output = EitherOutput<TA, TB>;
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type Error = EitherError<EA, EB>;
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type Future = EitherFuture2<A::Future, B::Future>;
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fn upgrade_inbound(self, sock: C, info: Self::Info) -> Self::Future {
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match (self, info) {
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(EitherUpgrade::A(a), EitherName::A(info)) => EitherFuture2::A(a.upgrade_inbound(sock, info)),
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(EitherUpgrade::B(b), EitherName::B(info)) => EitherFuture2::B(b.upgrade_inbound(sock, info)),
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_ => panic!("Invalid invocation of EitherUpgrade::upgrade_inbound")
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}
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}
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}
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impl<C, A, B, TA, TB, EA, EB> OutboundUpgrade<C> for EitherUpgrade<A, B>
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where
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A: OutboundUpgrade<C, Output = TA, Error = EA>,
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B: OutboundUpgrade<C, Output = TB, Error = EB>,
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{
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type Output = EitherOutput<TA, TB>;
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type Error = EitherError<EA, EB>;
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type Future = EitherFuture2<A::Future, B::Future>;
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fn upgrade_outbound(self, sock: C, info: Self::Info) -> Self::Future {
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match (self, info) {
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(EitherUpgrade::A(a), EitherName::A(info)) => EitherFuture2::A(a.upgrade_outbound(sock, info)),
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(EitherUpgrade::B(b), EitherName::B(info)) => EitherFuture2::B(b.upgrade_outbound(sock, info)),
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_ => panic!("Invalid invocation of EitherUpgrade::upgrade_outbound")
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}
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}
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}
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/// A type to represent two possible `Iterator` types.
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#[derive(Debug, Clone)]
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pub enum EitherIter<A, B> { A(A), B(B) }
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impl<A, B> Iterator for EitherIter<A, B>
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where
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A: Iterator,
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B: Iterator
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{
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type Item = EitherName<A::Item, B::Item>;
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fn next(&mut self) -> Option<Self::Item> {
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match self {
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EitherIter::A(a) => a.next().map(EitherName::A),
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EitherIter::B(b) => b.next().map(EitherName::B)
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}
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}
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fn size_hint(&self) -> (usize, Option<usize>) {
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match self {
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EitherIter::A(a) => a.size_hint(),
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EitherIter::B(b) => b.size_hint()
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}
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}
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}
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