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use bzip2::write::BzEncoder;
use std::fmt;
use std::io;
use crate::Result;
use crate::types::CompressionLevel;
use super::{Generic, Message, BoxStack, Stackable, Cookie};
/// BZing writer.
pub struct BZ<'a, C: 'a> {
inner: Generic<BzEncoder<BoxStack<'a, C>>, C>,
}
assert_send_and_sync!(BZ<'_, C>, C);
impl<'a> BZ<'a, Cookie> {
/// Makes a BZ compressing writer.
pub fn new<L>(inner: Message<'a>, cookie: Cookie, level: L) -> Message<'a>
where L: Into<Option<CompressionLevel>>
{
Message::from(Box::new(BZ {
inner: Generic::new_unboxed(
BzEncoder::new(inner.into(),
level.into().unwrap_or_default().into()),
cookie),
}))
}
}
impl<'a, C: 'a> fmt::Debug for BZ<'a, C> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("writer::BZ")
.field("inner", &self.inner)
.finish()
}
}
impl<'a, C: 'a> io::Write for BZ<'a, C> {
fn write(&mut self, bytes: &[u8]) -> io::Result<usize> {
self.inner.write(bytes)
}
fn flush(&mut self) -> io::Result<()> {
self.inner.flush()
}
}
impl<'a, C: 'a> Stackable<'a, C> for BZ<'a, C> {
fn into_inner(self: Box<Self>) -> Result<Option<BoxStack<'a, C>>> {
let inner = self.inner.inner.finish()?;
Ok(Some(inner))
}
fn pop(&mut self) -> Result<Option<BoxStack<'a, C>>> {
unreachable!("Only implemented by Signer")
}
fn mount(&mut self, _new: BoxStack<'a, C>) {
unreachable!("Only implemented by Signer")
}
fn inner_mut(&mut self) -> Option<&mut (dyn Stackable<'a, C> + Send + Sync)> {
Some(self.inner.inner.get_mut())
}
fn inner_ref(&self) -> Option<&(dyn Stackable<'a, C> + Send + Sync)> {
Some(self.inner.inner.get_ref())
}
fn cookie_set(&mut self, cookie: C) -> C {
self.inner.cookie_set(cookie)
}
fn cookie_ref(&self) -> &C {
self.inner.cookie_ref()
}
fn cookie_mut(&mut self) -> &mut C {
self.inner.cookie_mut()
}
fn position(&self) -> u64 {
self.inner.position
}
}
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