mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-27 17:28:00 +00:00
Bastian Köcher
94 lines
2.7 KiB
Rust
94 lines
2.7 KiB
Rust
// Copyright 2017-2019 Parity Technologies (UK) Ltd.
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// This file is part of Substrate.
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// Substrate 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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// Substrate 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 Substrate. If not, see <http://www.gnu.org/licenses/>.
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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(d: &'a dyn AsBytesRef) -> Self { HexDisplay(d.as_bytes_ref()) }
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}
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impl<'a> ::core::fmt::Display for HexDisplay<'a> {
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fn fmt(&self, fmtr: &mut ::core::fmt::Formatter) -> Result<(), ::core::fmt::Error> {
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if self.0.len() < 1027 {
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for byte in self.0 {
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fmtr.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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fmtr.write_fmt(format_args!("{:02x}", byte))?;
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}
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fmtr.write_str("...")?;
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for byte in &self.0[self.0.len() - 512..] {
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fmtr.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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/// 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<'a> AsBytesRef for &'a [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; 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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