mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-27 05:47:58 +00:00
Benjamin Kampmann
119 lines
3.0 KiB
Rust
119 lines
3.0 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2020 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use codec::{Encode, Decode};
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use sp_core::RuntimeDebug;
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use sp_std::vec::Vec;
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/// A string that wraps a `&'static str` in the runtime and `String`/`Vec<u8>` on decode.
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#[derive(Eq, RuntimeDebug, Clone)]
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pub enum RuntimeString {
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/// The borrowed mode that wraps a `&'static str`.
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Borrowed(&'static str),
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/// The owned mode that wraps a `String`.
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#[cfg(feature = "std")]
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Owned(String),
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/// The owned mode that wraps a `Vec<u8>`.
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#[cfg(not(feature = "std"))]
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Owned(Vec<u8>),
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}
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impl From<&'static str> for RuntimeString {
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fn from(data: &'static str) -> Self {
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Self::Borrowed(data)
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}
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}
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#[cfg(feature = "std")]
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impl From<RuntimeString> for String {
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fn from(string: RuntimeString) -> Self {
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match string {
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RuntimeString::Borrowed(data) => data.to_owned(),
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RuntimeString::Owned(data) => data,
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}
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}
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}
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impl Default for RuntimeString {
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fn default() -> Self {
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Self::Borrowed(Default::default())
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}
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}
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impl PartialEq for RuntimeString {
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fn eq(&self, other: &Self) -> bool {
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self.as_ref() == other.as_ref()
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}
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}
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impl AsRef<[u8]> for RuntimeString {
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fn as_ref(&self) -> &[u8] {
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match self {
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Self::Borrowed(val) => val.as_ref(),
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Self::Owned(val) => val.as_ref(),
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}
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}
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}
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impl Encode for RuntimeString {
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fn encode(&self) -> Vec<u8> {
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match self {
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Self::Borrowed(val) => val.encode(),
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Self::Owned(val) => val.encode(),
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}
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}
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}
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impl Decode for RuntimeString {
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fn decode<I: codec::Input>(value: &mut I) -> Result<Self, codec::Error> {
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Decode::decode(value).map(Self::Owned)
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}
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}
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#[cfg(feature = "std")]
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impl std::fmt::Display for RuntimeString {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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match self {
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Self::Borrowed(val) => write!(f, "{}", val),
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Self::Owned(val) => write!(f, "{}", val),
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}
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}
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}
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#[cfg(feature = "std")]
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impl serde::Serialize for RuntimeString {
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fn serialize<S: serde::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
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match self {
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Self::Borrowed(val) => val.serialize(serializer),
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Self::Owned(val) => val.serialize(serializer),
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}
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}
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}
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#[cfg(feature = "std")]
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impl<'de> serde::Deserialize<'de> for RuntimeString {
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fn deserialize<D: serde::Deserializer<'de>>(de: D) -> Result<Self, D::Error> {
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String::deserialize(de).map(Self::Owned)
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}
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}
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/// Create a const [`RuntimeString`].
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#[macro_export]
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macro_rules! create_runtime_str {
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( $y:expr ) => {{ $crate::RuntimeString::Borrowed($y) }}
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}
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