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Update rustc to 00b112c45a604fa6f4b59af2a40c9deeadfdb7c6/rustc-1.0.0-dev.

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Josh Matthews 2015-01-15 13:26:44 -05:00 • committed by Glenn Watson
parent ff8cbff810
commit 95fc29fa0d
255 changed files with 3550 additions and 3362 deletions
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36
components/util/fnv.rs
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@ -4,7 +4,8 @@
//! This file stolen wholesale from rustc/src/librustc/util/nodemap.rs
pub use std::hash::{Hash, Hasher, Writer};
use std::default::Default;
use std::hash::{Hasher, Writer};
/// A speedy hash algorithm for node ids and def ids. The hashmap in
/// libcollections by default uses SipHash which isn't quite as speedy as we
@ -13,33 +14,26 @@ pub use std::hash::{Hash, Hasher, Writer};
///
/// This uses FNV hashing, as described here:
/// http://en.wikipedia.org/wiki/Fowler%E2%80%93Noll%E2%80%93Vo_hash_function
#[deriving(Clone)]
pub struct FnvHasher;
#[allow(missing_copy_implementations)]
pub struct FnvHasher(u64);
pub struct FnvState(u64);
impl Hasher<FnvState> for FnvHasher {
fn hash<Sized? T: Hash<FnvState>>(&self, t: &T) -> u64 {
let mut state = FnvState(0xcbf29ce484222325);
t.hash(&mut state);
let FnvState(ret) = state;
return ret;
}
impl Default for FnvHasher {
fn default() -> FnvHasher { FnvHasher(0xcbf29ce484222325) }
}
impl Writer for FnvState {
impl Hasher for FnvHasher {
type Output = u64;
fn reset(&mut self) { *self = Default::default(); }
fn finish(&self) -> u64 { self.0 }
}
impl Writer for FnvHasher {
fn write(&mut self, bytes: &[u8]) {
let FnvState(mut hash) = *self;
let FnvHasher(mut hash) = *self;
for byte in bytes.iter() {
hash = hash ^ (*byte as u64);
hash = hash * 0x100000001b3;
}
*self = FnvState(hash);
*self = FnvHasher(hash);
}
}
#[inline(always)]
pub fn hash<T: Hash<FnvState>>(t: &T) -> u64 {
let s = FnvHasher;
s.hash(t)
}