//! Read and write the git packet line wire format without copying it.//!//! For reading the packet line format use the [`StreamingPeekableIter`], and for writing the [`Writer`].//! ## Feature Flags#![cfg_attr(    feature = "document-features",    cfg_attr(doc, doc = ::document_features::document_features!()))]#![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]#![deny(missing_docs, rust_2018_idioms, unsafe_code)] const U16_HEX_BYTES: usize = 4;const MAX_DATA_LEN: usize = 65516;const MAX_LINE_LEN: usize = MAX_DATA_LEN + U16_HEX_BYTES;const FLUSH_LINE: &[u8] = b"0000";const DELIMITER_LINE: &[u8] = b"0001";const RESPONSE_END_LINE: &[u8] = b"0002";const ERR_PREFIX: &[u8] = b"ERR "; /// One of three side-band types allowing to multiplex information over a single connection.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone, Copy)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub enum Channel {    /// The usable data itself in any format.    Data = 1,    /// Progress information in a user-readable format.    Progress = 2,    /// Error information in a user readable format. Receiving it usually terminates the connection.    Error = 3,} mod line;///pub mod read; ///#[cfg(any(feature = "async-io", feature = "blocking-io"))]mod write;#[cfg(all(not(feature = "blocking-io"), feature = "async-io"))]pub use write::async_io::Writer;#[cfg(feature = "blocking-io")]pub use write::blocking_io::Writer; /// A borrowed packet line as it refers to a slice of data by reference.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone, Copy)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub enum PacketLineRef<'a> {    /// A chunk of raw data.    Data(&'a [u8]),    /// A flush packet.    Flush,    /// A delimiter packet.    Delimiter,    /// The end of the response.    ResponseEnd,} /// A packet line representing an Error in a side-band channel.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone, Copy)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub struct ErrorRef<'a>(pub &'a [u8]); /// A packet line representing text, which may include a trailing newline.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone, Copy)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub struct TextRef<'a>(pub &'a [u8]); /// A band in a side-band channel.#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone, Copy)]#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]pub enum BandRef<'a> {    /// A band carrying data.    Data(&'a [u8]),    /// A band carrying user readable progress information.    Progress(&'a [u8]),    /// A band carrying user readable errors.    Error(&'a [u8]),} /// Read pack lines one after another, without consuming more than needed from the underlying/// [`Read`][std::io::Read]. [`Flush`][PacketLineRef::Flush] lines cause the reader to stop producing lines forever,/// leaving [`Read`][std::io::Read] at the start of whatever comes next.////// This implementation tries hard not to allocate at all which leads to quite some added complexity and plenty of extra memory copies.pub struct StreamingPeekableIter<T> {    read: T,    peek_buf: Vec<u8>,    #[cfg(any(feature = "blocking-io", feature = "async-io"))]    buf: Vec<u8>,    fail_on_err_lines: bool,    delimiters: &'static [PacketLineRef<'static>],    is_done: bool,    stopped_at: Option<PacketLineRef<'static>>,} /// Utilities to help decoding packet linespub mod decode;#[doc(inline)]pub use decode::all_at_once as decode;/// Utilities to encode different kinds of packet linespub mod encode; #[cfg(all(feature = "async-io", feature = "blocking-io"))]compile_error!("Cannot set both 'blocking-io' and 'async-io' features as they are mutually exclusive");