sml_rs/parser/
octet_string.rs

1//! An OctetString in SML is a sequence of bytes.
2
3use super::{
4    take_n,
5    tlf::{Ty, TypeLengthField},
6    ResTy, SmlParseTlf,
7};
8
9// #[cfg(feature = "alloc")]
10// /// OctetString is the owned version of a sequence of bytes.
11// pub type OctetString = alloc::vec::Vec<u8>;
12
13// #[cfg(feature = "alloc")]
14// impl<'i> SmlParseTlf<'i> for OctetString {
15//     fn check_tlf(tlf: &TypeLengthField) -> bool {
16//         OctetStr::check_tlf(tlf)
17//     }
18
19//     fn parse_with_tlf(input: &'i [u8], tlf: &TypeLengthField) -> ResTy<'i, Self> {
20//         let (input, octet_str) = OctetStr::parse_with_tlf(input, tlf)?;
21//         Ok((input, octet_str.to_vec()))
22//     }
23// }
24
25/// OctetStr is the borrowed version of a sequence of bytes.
26pub type OctetStr<'i> = &'i [u8];
27
28impl<'i> SmlParseTlf<'i> for OctetStr<'i> {
29    fn check_tlf(tlf: &TypeLengthField) -> bool {
30        matches!(tlf.ty, Ty::OctetString)
31    }
32
33    fn parse_with_tlf(input: &'i [u8], tlf: &TypeLengthField) -> ResTy<'i, Self> {
34        take_n(input, tlf.len as usize)
35    }
36}
37
38#[cfg(test)]
39mod test {
40
41    use super::*;
42    use crate::parser::SmlParse;
43    use hex_literal::hex;
44
45    #[test]
46    fn test_octet_str() {
47        // simple
48        assert_eq!(
49            OctetStr::parse_complete(&hex!("0648656C6C6F")).expect("Decode Error"),
50            &b"Hello"[..]
51        );
52
53        // long
54        assert_eq!(
55            <&[u8]>::parse_complete(b"\x81\x0Cqwertzuiopasdfghjklyxcvbnm").expect("Decode Error"),
56            &b"qwertzuiopasdfghjklyxcvbnm"[..]
57        );
58
59        // optional
60        assert_eq!(
61            Option::<&[u8]>::parse_complete(b"\x01").expect("Decode Error"),
62            None
63        );
64    }
65}
sml_rs/parser/octet_string.rs

sml_rs/parser/
octet_string.rs
