120 lines
3.4 KiB
Rust
120 lines
3.4 KiB
Rust
// Copyright 2015-2017 Parity Technologies (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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//! Lenient hash json deserialization for test json files.
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use std::str::FromStr;
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use std::fmt;
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use serde::{Deserialize, Deserializer, Serialize, Serializer};
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use serde::de::{Error, Visitor};
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use rustc_serialize::hex::ToHex;
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use util::hash::{H64 as Hash64, H160 as Hash160, H256 as Hash256, H520 as Hash520, H2048 as Hash2048};
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macro_rules! impl_hash {
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($name: ident, $inner: ident) => {
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/// Lenient hash json deserialization for test json files.
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#[derive(Default, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, Clone)]
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pub struct $name(pub $inner);
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impl From<$name> for $inner {
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fn from(other: $name) -> $inner {
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other.0
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}
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}
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impl From<$inner> for $name {
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fn from(i: $inner) -> Self {
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$name(i)
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}
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}
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impl Deserialize for $name {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where D: Deserializer {
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struct HashVisitor;
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impl Visitor for HashVisitor {
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type Value = $name;
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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write!(formatter, "a 0x-prefixed hex-encoded hash")
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}
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fn visit_str<E>(self, value: &str) -> Result<Self::Value, E> where E: Error {
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let value = match value.len() {
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0 => $inner::from(0),
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2 if value == "0x" => $inner::from(0),
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_ if value.starts_with("0x") => $inner::from_str(&value[2..]).map_err(|e| {
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Error::custom(format!("Invalid hex value {}: {}", value, e).as_str())
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})?,
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_ => $inner::from_str(value).map_err(|e| {
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Error::custom(format!("Invalid hex value {}: {}", value, e).as_str())
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})?,
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};
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Ok($name(value))
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}
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fn visit_string<E>(self, value: String) -> Result<Self::Value, E> where E: 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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impl Serialize for $name {
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fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: 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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}
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}
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impl_hash!(H64, Hash64);
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impl_hash!(Address, Hash160);
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impl_hash!(H256, Hash256);
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impl_hash!(H520, Hash520);
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impl_hash!(Bloom, Hash2048);
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#[cfg(test)]
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mod test {
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use std::str::FromStr;
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use serde_json;
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use util::hash;
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use hash::H256;
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#[test]
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fn hash_deserialization() {
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let s = r#"["", "5a39ed1020c04d4d84539975b893a4e7c53eab6c2965db8bc3468093a31bc5ae"]"#;
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let deserialized: Vec<H256> = serde_json::from_str(s).unwrap();
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assert_eq!(deserialized, vec![
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H256(hash::H256::from(0)),
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H256(hash::H256::from_str("5a39ed1020c04d4d84539975b893a4e7c53eab6c2965db8bc3468093a31bc5ae").unwrap())
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]);
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}
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#[test]
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fn hash_into() {
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assert_eq!(hash::H256::from(0), H256(hash::H256::from(0)).into());
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}
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}
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