3d8dc11442
This is a huge change, which includes some changes to replace code that originally cloned to reuse allocations instead. The updated `elastic-array` crate renames its consuming `Vec`-conversion method to `into_vec`, which means that I can do a simple `sed -i 's/to_vec/into_vec/'` and then fix the compilation errors. This commit is probably a minor performance win and definitely a significant readability win.
38 lines
1.2 KiB
Rust
38 lines
1.2 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
|
|
// This file is part of Parity.
|
|
|
|
// Parity is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// Parity is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
//! This migration compresses the state db.
|
|
|
|
use util::migration::{SimpleMigration, Progress};
|
|
use rlp::{Compressible, UntrustedRlp, RlpType};
|
|
|
|
/// Compressing migration.
|
|
#[derive(Default)]
|
|
pub struct V8(Progress);
|
|
|
|
impl SimpleMigration for V8 {
|
|
fn version(&self) -> u32 {
|
|
8
|
|
}
|
|
|
|
fn columns(&self) -> Option<u32> { None }
|
|
|
|
fn simple_migrate(&mut self, key: Vec<u8>, value: Vec<u8>) -> Option<(Vec<u8>, Vec<u8>)> {
|
|
self.0.tick();
|
|
Some((key,UntrustedRlp::new(&value).compress(RlpType::Blocks).into_vec()))
|
|
}
|
|
}
|