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#![warn(missing_docs)]
#![warn(missing_debug_implementations)]
extern crate digest;
extern crate generic_array;
use std::io;
use generic_array::{ArrayLength, GenericArray};
use digest::InvalidLength;
pub use digest::{Input, BlockInput, FixedOutput, VariableOutput, Digest};
#[derive(Debug, Clone, Default)]
pub struct Writer<D>(D);
impl<D: Input + FixedOutput> Writer<D> {
pub fn new(d: D) -> Writer<D> {
Writer(d)
}
pub fn get_ref(&self) -> &D {
&self.0
}
pub fn get_mut(&mut self) -> &mut D {
&mut self.0
}
pub fn into_inner(self) -> D {
self.0
}
}
impl<D: Input> io::Write for Writer<D> {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
self.0.process(buf);
Ok(buf.len())
}
fn flush(&mut self) -> io::Result<()> {
Ok(())
}
}
impl<D: Input> Input for Writer<D> {
fn process(&mut self, input: &[u8]) {
self.0.process(input);
}
}
impl<D> BlockInput for Writer<D>
where D: BlockInput, D::BlockSize: ArrayLength<u8>
{
type BlockSize = D::BlockSize;
}
impl<D> FixedOutput for Writer<D>
where D: FixedOutput, D::OutputSize: ArrayLength<u8>
{
type OutputSize = D::OutputSize;
fn fixed_result(self) -> GenericArray<u8, Self::OutputSize> {
self.0.fixed_result()
}
}
impl<D: VariableOutput> VariableOutput for Writer<D> {
fn new(output_size: usize) -> Result<Writer<D>, InvalidLength> {
D::new(output_size).map(Writer)
}
fn output_size(&self) -> usize {
self.0.output_size()
}
fn variable_result(self, buffer: &mut [u8]) -> Result<&[u8], InvalidLength> {
self.0.variable_result(buffer)
}
}