47 lines · 1.3 KB · Rust
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use crate::{Sign, Signature, Time, SPACE};use std::io; impl Signature {    /// An empty signature, similar to 'null'.    pub fn empty() -> Self {        Signature {            name: Default::default(),            email: Default::default(),            time: Time {                time: 0,                offset: 0,                sign: Sign::Plus,            },        }    }} impl Time {    /// Serialize this instance to `out` in a format suitable for use in header fields of serialized git commits or tags.    pub fn write_to(&self, mut out: impl io::Write) -> io::Result<()> {        itoa::write(&mut out, self.time)?;        out.write_all(SPACE)?;        out.write_all(&[match self.sign {            Sign::Plus => b'+',            Sign::Minus => b'-',        }])?;         const ZERO: &[u8; 1] = b"0";         const SECONDS_PER_HOUR: i32 = 60 * 60;        let offset = self.offset.abs();        let hours = offset / SECONDS_PER_HOUR;        assert!(hours < 25, "offset is more than a day: {}", hours);        let minutes = (offset - (hours * SECONDS_PER_HOUR)) / 60;         if hours < 10 {            out.write_all(ZERO)?;        }        itoa::write(&mut out, hours)?;         if minutes < 10 {            out.write_all(ZERO)?;        }        itoa::write(&mut out, minutes).map(|_| ())    }}