72 lines
2.5 KiB
Rust
72 lines
2.5 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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//! Diff misc.
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use std::fs::File;
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use common::*;
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use rustc_version;
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include!(concat!(env!("OUT_DIR"), "/version.rs"));
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#[derive(Debug,Clone,PartialEq,Eq)]
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/// Diff type for specifying a change (or not).
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pub enum Diff<T> where T: Eq {
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/// Both sides are the same.
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Same,
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/// Left (pre, source) side doesn't include value, right side (post, destination) does.
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Born(T),
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/// Both sides include data; it chaged value between them.
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Changed(T, T),
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/// Left (pre, source) side does include value, right side (post, destination) does not.
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Died(T),
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}
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impl<T> Diff<T> where T: Eq {
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/// Construct new object with given `pre` and `post`.
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pub fn new(pre: T, post: T) -> Self { if pre == post { Diff::Same } else { Diff::Changed(pre, post) } }
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/// Get the before value, if there is one.
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pub fn pre(&self) -> Option<&T> { match *self { Diff::Died(ref x) | Diff::Changed(ref x, _) => Some(x), _ => None } }
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/// Get the after value, if there is one.
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pub fn post(&self) -> Option<&T> { match *self { Diff::Born(ref x) | Diff::Changed(_, ref x) => Some(x), _ => None } }
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/// Determine whether there was a change or not.
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pub fn is_same(&self) -> bool { match *self { Diff::Same => true, _ => false }}
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}
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#[derive(PartialEq,Eq,Clone,Copy)]
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/// Boolean type for clean/dirty status.
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pub enum Filth {
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/// Data has not been changed.
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Clean,
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/// Data has been changed.
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Dirty,
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}
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/// Read the whole contents of a file `name`.
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pub fn contents(name: &str) -> Result<Bytes, UtilError> {
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let mut file = try!(File::open(name));
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let mut ret: Vec<u8> = Vec::new();
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try!(file.read_to_end(&mut ret));
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Ok(ret)
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}
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/// Get the standard version string for this software.
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pub fn version() -> String {
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format!("Parity/{}/{}-{}/{}/rustc{}", env!("CARGO_PKG_VERSION"), short_sha(), commit_date(), target(), rustc_version::version())
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} |