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#[deny(missing_docs)]
#[cfg(test)]
#[macro_use]
extern crate quickcheck;
use std::fmt;
use std::hash;
mod baseline;
mod specialized;
mod table;
#[derive(Clone)]
enum State {
Baseline(baseline::State),
Specialized(specialized::State),
}
#[derive(Clone)]
pub struct Hasher {
state: State,
}
impl Hasher {
pub fn new() -> Self {
Self::internal_new_specialized().unwrap_or_else(|| Self::internal_new_baseline())
}
#[doc(hidden)]
pub fn internal_new_baseline() -> Self {
Hasher {
state: State::Baseline(baseline::State::new()),
}
}
#[doc(hidden)]
pub fn internal_new_specialized() -> Option<Self> {
{
if let Some(state) = specialized::State::new() {
return Some(Hasher {
state: State::Specialized(state),
});
}
}
None
}
pub fn update(&mut self, buf: &[u8]) {
match self.state {
State::Baseline(ref mut state) => state.update(buf),
State::Specialized(ref mut state) => state.update(buf),
}
}
pub fn finalize(self) -> u32 {
match self.state {
State::Baseline(state) => state.finalize(),
State::Specialized(state) => state.finalize(),
}
}
}
impl fmt::Debug for Hasher {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("crc32fast::Hasher").finish()
}
}
impl Default for Hasher {
fn default() -> Self {
Self::new()
}
}
impl hash::Hasher for Hasher {
fn write(&mut self, bytes: &[u8]) {
self.update(bytes)
}
fn finish(&self) -> u64 {
self.clone().finalize() as u64
}
}