Showing the changes to git-object/src/commit/message/decode.rs (1 of 4 files). Show all
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| @@ -0,0 +1,57 @@ | ||
| 1 | +use nom::{ | |
| 2 | + branch::alt, | |
| 3 | + bytes::complete::{tag, take_till1}, | |
| 4 | + combinator::all_consuming, | |
| 5 | + error::ParseError, | |
| 6 | + sequence::pair, | |
| 7 | + IResult, | |
| 8 | +}; | |
| 9 | + | |
| 10 | +use crate::bstr::{BStr, ByteSlice}; | |
| 11 | + | |
| 12 | +pub(crate) fn newline<'a, E: ParseError<&'a [u8]>>(i: &'a [u8]) -> IResult<&'a [u8], &'a [u8], E> { | |
| 13 | + alt((tag(b"\r\n"), tag(b"\n")))(i) | |
| 14 | +} | |
| 15 | + | |
| 16 | +fn subject_and_body<'a, E: ParseError<&'a [u8]>>(i: &'a [u8]) -> IResult<&'a [u8], (&'a BStr, Option<&'a BStr>), E> { | |
| 17 | + let mut c = i; | |
| 18 | + let mut consumed_bytes = 0; | |
| 19 | + while !c.is_empty() { | |
| 20 | + c = match take_till1::<_, _, E>(|c| c == b'\n' || c == b'\r')(c) { | |
| 21 | + Ok((i1, segment)) => { | |
| 22 | + consumed_bytes += segment.len(); | |
| 23 | + match pair::<_, _, _, E, _, _>(newline, newline)(i1) { | |
| 24 | + Ok((body, _)) => { | |
| 25 | + return Ok(( | |
| 26 | + &[], | |
| 27 | + ( | |
| 28 | + i[0usize..consumed_bytes].as_bstr(), | |
| 29 | + (!body.is_empty()).then(|| body.as_bstr()), | |
| 30 | + ), | |
| 31 | + )); | |
| 32 | + } | |
| 33 | + Err(_) => match i1.get(1..) { | |
| 34 | + Some(next) => { | |
| 35 | + consumed_bytes += 1; | |
| 36 | + next | |
| 37 | + } | |
| 38 | + None => break, | |
| 39 | + }, | |
| 40 | + } | |
| 41 | + } | |
| 42 | + Err(_) => match c.get(1..) { | |
| 43 | + Some(next) => { | |
| 44 | + consumed_bytes += 1; | |
| 45 | + next | |
| 46 | + } | |
| 47 | + None => break, | |
| 48 | + }, | |
| 49 | + }; | |
| 50 | + } | |
| 51 | + Ok((&[], (i.as_bstr(), None))) | |
| 52 | +} | |
| 53 | + | |
| 54 | +/// Returns title and body, without separator | |
| 55 | +pub fn message(input: &[u8]) -> (&BStr, Option<&BStr>) { | |
| 56 | + all_consuming(subject_and_body::<()>)(input).expect("cannot fail").1 | |
| 57 | +} | |