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//! Line endings.
/// Carriage return
pub(crate) const CHAR_CR: u8 = 0x0d;
/// Line feed
pub(crate) const CHAR_LF: u8 = 0x0a;
/// Line endings: variants of newline characters that can be used with Base64.
///
/// Use [`LineEnding::default`] to get an appropriate line ending for the
/// current operating system.
#[allow(clippy::upper_case_acronyms)]
#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
pub enum LineEnding {
/// Carriage return: `\r` (Pre-OS X Macintosh)
CR,
/// Line feed: `\n` (Unix OSes)
LF,
/// Carriage return + line feed: `\r\n` (Windows)
CRLF,
}
impl Default for LineEnding {
// Default line ending matches conventions for target OS
#[cfg(windows)]
fn default() -> LineEnding {
LineEnding::CRLF
}
#[cfg(not(windows))]
fn default() -> LineEnding {
LineEnding::LF
}
}
#[allow(clippy::len_without_is_empty)]
impl LineEnding {
/// Get the byte serialization of this [`LineEnding`].
pub fn as_bytes(self) -> &'static [u8] {
match self {
LineEnding::CR => &[CHAR_CR],
LineEnding::LF => &[CHAR_LF],
LineEnding::CRLF => &[CHAR_CR, CHAR_LF],
}
}
/// Get the encoded length of this [`LineEnding`].
pub fn len(self) -> usize {
self.as_bytes().len()
}
}
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