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|
use adler32::RollingAdler32;
pub trait RollingChecksum {
fn update(&mut self, byte: u8);
fn update_from_slice(&mut self, data: &[u8]);
fn current_hash(&self) -> u32;
}
pub struct NoChecksum {}
impl NoChecksum {
pub fn new() -> NoChecksum {
NoChecksum {}
}
}
impl RollingChecksum for NoChecksum {
fn update(&mut self, _: u8) {}
fn update_from_slice(&mut self, _: &[u8]) {}
fn current_hash(&self) -> u32 {
1
}
}
impl<'a> RollingChecksum for &'a mut NoChecksum {
fn update(&mut self, _: u8) {}
fn update_from_slice(&mut self, _: &[u8]) {}
fn current_hash(&self) -> u32 {
1
}
}
pub struct Adler32Checksum {
adler32: RollingAdler32,
}
impl Adler32Checksum {
pub fn new() -> Adler32Checksum {
Adler32Checksum {
adler32: RollingAdler32::new(),
}
}
}
impl RollingChecksum for Adler32Checksum {
fn update(&mut self, byte: u8) {
self.adler32.update(byte);
}
fn update_from_slice(&mut self, data: &[u8]) {
self.adler32.update_buffer(data);
}
fn current_hash(&self) -> u32 {
self.adler32.hash()
}
}
impl<'a> RollingChecksum for &'a mut Adler32Checksum {
fn update(&mut self, byte: u8) {
self.adler32.update(byte);
}
fn update_from_slice(&mut self, data: &[u8]) {
self.adler32.update_buffer(data);
}
fn current_hash(&self) -> u32 {
self.adler32.hash()
}
}
|
