use super::{AlgorithmName, XofReaderCore};
use crate::XofReader;
use block_buffer::ReadBuffer;
use core::fmt;
#[derive(Clone, Default)]
pub struct XofReaderCoreWrapper<T>
where
T: XofReaderCore,
{
pub(super) core: T,
pub(super) buffer: ReadBuffer<T::BlockSize>,
}
impl<T> fmt::Debug for XofReaderCoreWrapper<T>
where
T: XofReaderCore + AlgorithmName,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
T::write_alg_name(f)?;
f.write_str(" { .. }")
}
}
impl<T> XofReader for XofReaderCoreWrapper<T>
where
T: XofReaderCore,
{
#[inline]
fn read(&mut self, buffer: &mut [u8]) {
let Self { core, buffer: buf } = self;
buf.read(buffer, |block| *block = core.read_block());
}
}
#[cfg(feature = "std")]
impl<T> std::io::Read for XofReaderCoreWrapper<T>
where
T: XofReaderCore,
{
#[inline]
fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
XofReader::read(self, buf);
Ok(buf.len())
}
}
impl<T: XofReaderCore> Drop for XofReaderCoreWrapper<T> {
#[inline]
fn drop(&mut self) {
#[cfg(feature = "zeroize")]
{
use zeroize::Zeroize;
self.buffer.zeroize();
}
}
}
#[cfg(feature = "zeroize")]
impl<T: XofReaderCore + zeroize::ZeroizeOnDrop> zeroize::ZeroizeOnDrop for XofReaderCoreWrapper<T> {}