146 lines
3.7 KiB
Rust
146 lines
3.7 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity 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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// Parity 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 Parity. If not, see <http://www.gnu.org/licenses/>.
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use std::fmt;
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use std::str::FromStr;
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use std::cmp::Ordering;
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use std::hash::{Hash, Hasher};
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use serde;
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use rustc_serialize::hex::{ToHex, FromHex};
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use util::{H64 as Eth64, H256 as EthH256, H520 as EthH520, H2048 as Eth2048, Address};
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macro_rules! impl_hash {
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($name: ident, $other: ident, $size: expr) => {
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/// Hash serialization
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#[derive(Eq)]
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pub struct $name([u8; $size]);
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impl Default for $name {
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fn default() -> Self {
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$name([0; $size])
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}
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}
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impl fmt::Debug for $name {
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fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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write!(f, "{}", self.0.to_hex())
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}
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}
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impl<T> From<T> for $name where $other: From<T> {
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fn from(o: T) -> Self {
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$name($other::from(o).0)
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}
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}
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impl FromStr for $name {
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type Err = <$other as FromStr>::Err;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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$other::from_str(s).map(|x| $name(x.0))
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}
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}
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impl Into<$other> for $name {
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fn into(self) -> $other {
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$other(self.0)
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}
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}
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impl PartialEq for $name {
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fn eq(&self, other: &Self) -> bool {
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let self_ref: &[u8] = &self.0;
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let other_ref: &[u8] = &other.0;
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self_ref == other_ref
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}
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}
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impl PartialOrd for $name {
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fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
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let self_ref: &[u8] = &self.0;
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let other_ref: &[u8] = &other.0;
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self_ref.partial_cmp(other_ref)
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}
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}
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impl Ord for $name {
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fn cmp(&self, other: &Self) -> Ordering {
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let self_ref: &[u8] = &self.0;
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let other_ref: &[u8] = &other.0;
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self_ref.cmp(other_ref)
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}
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}
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impl Hash for $name {
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fn hash<H>(&self, state: &mut H) where H: Hasher {
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let self_ref: &[u8] = &self.0;
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Hash::hash(self_ref, state)
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}
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}
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impl Clone for $name {
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fn clone(&self) -> Self {
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let mut r = [0; $size];
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r.copy_from_slice(&self.0);
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$name(r)
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}
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}
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impl serde::Serialize for $name {
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fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
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where S: serde::Serializer {
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let mut hex = "0x".to_owned();
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hex.push_str(&self.0.to_hex());
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serializer.serialize_str(&hex)
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}
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}
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impl serde::Deserialize for $name {
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fn deserialize<D>(deserializer: &mut D) -> Result<$name, D::Error> where D: serde::Deserializer {
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struct HashVisitor;
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impl serde::de::Visitor for HashVisitor {
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type Value = $name;
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fn visit_str<E>(&mut self, value: &str) -> Result<Self::Value, E> where E: serde::Error {
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match value[2..].from_hex() {
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Ok(ref v) if v.len() == $size => {
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let mut result = [0u8; $size];
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result.copy_from_slice(v);
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Ok($name(result))
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},
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Ok(_) => Err(serde::Error::custom("Invalid length.")),
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_ => Err(serde::Error::custom("Invalid hex value."))
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}
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}
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fn visit_string<E>(&mut self, value: String) -> Result<Self::Value, E> where E: serde::Error {
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self.visit_str(value.as_ref())
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}
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}
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deserializer.deserialize(HashVisitor)
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}
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}
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}
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}
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impl_hash!(H64, Eth64, 8);
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impl_hash!(H160, Address, 20);
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impl_hash!(H256, EthH256, 32);
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impl_hash!(H520, EthH520, 65);
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impl_hash!(H2048, Eth2048, 256);
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