mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-26 19:17:58 +00:00
Benjamin Kampmann
104 lines
2.8 KiB
Rust
104 lines
2.8 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2017-2020 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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//! Wrapper type for byte collections that outputs hex.
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/// Simple wrapper to display hex representation of bytes.
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pub struct HexDisplay<'a>(&'a [u8]);
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impl<'a> HexDisplay<'a> {
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/// Create new instance that will display `d` as a hex string when displayed.
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pub fn from<R: AsBytesRef>(d: &'a R) -> Self { HexDisplay(d.as_bytes_ref()) }
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}
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impl<'a> sp_std::fmt::Display for HexDisplay<'a> {
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fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> Result<(), sp_std::fmt::Error> {
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if self.0.len() < 1027 {
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for byte in self.0 {
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f.write_fmt(format_args!("{:02x}", byte))?;
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}
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} else {
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for byte in &self.0[0..512] {
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f.write_fmt(format_args!("{:02x}", byte))?;
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}
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f.write_str("...")?;
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for byte in &self.0[self.0.len() - 512..] {
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f.write_fmt(format_args!("{:02x}", byte))?;
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}
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}
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Ok(())
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}
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}
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impl<'a> sp_std::fmt::Debug for HexDisplay<'a> {
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fn fmt(&self, f: &mut sp_std::fmt::Formatter) -> Result<(), sp_std::fmt::Error> {
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for byte in self.0 {
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f.write_fmt(format_args!("{:02x}", byte))?;
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}
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Ok(())
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}
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}
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/// Simple trait to transform various types to `&[u8]`
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pub trait AsBytesRef {
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/// Transform `self` into `&[u8]`.
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fn as_bytes_ref(&self) -> &[u8];
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}
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impl AsBytesRef for &[u8] {
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fn as_bytes_ref(&self) -> &[u8] { self }
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}
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impl AsBytesRef for [u8] {
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fn as_bytes_ref(&self) -> &[u8] { &self }
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}
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impl AsBytesRef for Vec<u8> {
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fn as_bytes_ref(&self) -> &[u8] { &self }
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}
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macro_rules! impl_non_endians {
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( $( $t:ty ),* ) => { $(
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impl AsBytesRef for $t {
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fn as_bytes_ref(&self) -> &[u8] { &self[..] }
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}
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)* }
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}
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impl_non_endians!([u8; 1], [u8; 2], [u8; 3], [u8; 4], [u8; 5], [u8; 6], [u8; 7], [u8; 8],
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[u8; 10], [u8; 12], [u8; 14], [u8; 16], [u8; 20], [u8; 24], [u8; 28], [u8; 32], [u8; 40],
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[u8; 48], [u8; 56], [u8; 64], [u8; 65], [u8; 80], [u8; 96], [u8; 112], [u8; 128]);
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/// Format into ASCII + # + hex, suitable for storage key preimages.
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pub fn ascii_format(asciish: &[u8]) -> String {
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let mut r = String::new();
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let mut latch = false;
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for c in asciish {
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match (latch, *c) {
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(false, 32..=127) => r.push(*c as char),
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_ => {
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if !latch {
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r.push('#');
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latch = true;
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}
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r.push_str(&format!("{:02x}", *c));
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}
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}
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}
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r
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}
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