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//! This module contains backend-specific code.
use crate::mem::{CompressError, DecompressError, FlushCompress, FlushDecompress, Status};
use crate::Compression;
/// Traits specifying the interface of the backends.
///
/// Sync + Send are added as a condition to ensure they are available
/// for the frontend.
pub trait Backend: Sync + Send {
fn total_in(&self) -> u64;
fn total_out(&self) -> u64;
}
pub trait InflateBackend: Backend {
fn make(zlib_header: bool, window_bits: u8) -> Self;
fn decompress(
&mut self,
input: &[u8],
output: &mut [u8],
flush: FlushDecompress,
) -> Result<Status, DecompressError>;
fn reset(&mut self, zlib_header: bool);
}
pub trait DeflateBackend: Backend {
fn make(level: Compression, zlib_header: bool, window_bits: u8) -> Self;
fn compress(
&mut self,
input: &[u8],
output: &mut [u8],
flush: FlushCompress,
) -> Result<Status, CompressError>;
fn reset(&mut self);
}
// Default to Rust implementation unless explicitly opted in to a different backend.
#[cfg(feature = "any_zlib")]
mod c;
#[cfg(feature = "any_zlib")]
pub use self::c::*;
#[cfg(not(feature = "any_zlib"))]
mod rust;
#[cfg(not(feature = "any_zlib"))]
pub use self::rust::*;
impl std::fmt::Debug for ErrorMessage {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
self.get().fmt(f)
}
}