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https://github.com/pezkuwichain/pezkuwi-subxt.git
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Gav
53 lines
1.8 KiB
Rust
53 lines
1.8 KiB
Rust
// Copyright 2017 Parity Technologies (UK) Ltd.
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// This file is part of Polkadot.
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// Polkadot is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Polkadot is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Polkadot. If not, see <http://www.gnu.org/licenses/>.
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//! Interpret a static string of hex as a desired type.
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use rustc_hex::FromHex;
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/// Trait to allow conversion from a static hex string to an instance.
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pub trait StaticHexConversion: Sized {
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/// Convert the static str into Self. Use just like `From::from`.
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fn from_static_hex(hex: &'static str) -> Self;
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}
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macro_rules! impl_sizes {
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( $( $t:expr ),* ) => { $(
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impl StaticHexConversion for [u8; $t] {
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fn from_static_hex(hex: &'static str) -> Self {
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let mut r = [0u8; $t];
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r.copy_from_slice(&FromHex::from_hex(hex).unwrap());
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r
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}
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}
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)* }
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}
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impl_sizes!(1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56, 64, 80, 96, 112, 128);
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/// Trait to allow converting from itself (only implemented for a static str) into some useful
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/// type (which must implement `StaticHexConversion`).
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pub trait StaticHexInto {
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/// Convert self (i.e. a static str) into the appropriate type. Use just like `Into::into`.
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fn convert<T: StaticHexConversion>(self) -> T;
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}
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impl StaticHexInto for &'static str {
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fn convert<T: StaticHexConversion>(self) -> T {
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T::from_static_hex(self)
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}
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}
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