rasn/types/strings/
numeric.rs

1use super::{
2    bytes_to_chars, constrained, AsnType, Constraints, Decode, Decoder, Encode, Encoder,
3    Identifier, StaticPermittedAlphabet, Tag,
4};
5
6use crate::error::strings::PermittedAlphabetError;
7use alloc::vec::Vec;
8use once_cell::race::OnceBox;
9
10/// A string which can only contain numbers or `SPACE` characters.
11#[derive(Debug, Default, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
12pub struct NumericString(pub(super) Vec<u8>);
13static CHARACTER_MAP: OnceBox<alloc::collections::BTreeMap<u32, u32>> = OnceBox::new();
14static INDEX_MAP: OnceBox<alloc::collections::BTreeMap<u32, u32>> = OnceBox::new();
15
16impl NumericString {
17    /// Attempts to convert the provided bytes into [Self].
18    ///
19    /// # Errors
20    /// If any of the provided bytes does not match the allowed character set.
21    pub fn from_bytes(bytes: &[u8]) -> Result<Self, PermittedAlphabetError> {
22        Ok(Self(Self::try_from_slice(bytes)?))
23    }
24
25    /// Provides a slice of bytes representing the current value.
26    #[must_use]
27    pub fn as_bytes(&self) -> &[u8] {
28        &self.0
29    }
30}
31
32impl StaticPermittedAlphabet for NumericString {
33    type T = u8;
34    const CHARACTER_SET: &'static [u32] = &bytes_to_chars([
35        b' ', b'0', b'1', b'2', b'3', b'4', b'5', b'6', b'7', b'8', b'9',
36    ]);
37    const CHARACTER_SET_NAME: constrained::CharacterSetName =
38        constrained::CharacterSetName::Numeric;
39
40    fn chars(&self) -> impl Iterator<Item = u32> + '_ {
41        self.0.iter().map(|&byte| byte as u32)
42    }
43
44    fn push_char(&mut self, ch: u32) {
45        self.0.push(ch as u8);
46    }
47
48    fn index_map() -> &'static alloc::collections::BTreeMap<u32, u32> {
49        INDEX_MAP.get_or_init(Self::build_index_map)
50    }
51
52    fn character_map() -> &'static alloc::collections::BTreeMap<u32, u32> {
53        CHARACTER_MAP.get_or_init(Self::build_character_map)
54    }
55}
56
57impl AsnType for NumericString {
58    const TAG: Tag = Tag::NUMERIC_STRING;
59    const IDENTIFIER: Identifier = Identifier::NUMERIC_STRING;
60}
61
62impl Encode for NumericString {
63    fn encode_with_tag_and_constraints<'b, E: Encoder<'b>>(
64        &self,
65        encoder: &mut E,
66        tag: Tag,
67        constraints: Constraints,
68        identifier: Identifier,
69    ) -> Result<(), E::Error> {
70        encoder
71            .encode_numeric_string(tag, constraints, self, identifier)
72            .map(drop)
73    }
74}
75
76impl Decode for NumericString {
77    fn decode_with_tag_and_constraints<D: Decoder>(
78        decoder: &mut D,
79        tag: Tag,
80        constraints: Constraints,
81    ) -> Result<Self, D::Error> {
82        decoder.decode_numeric_string(tag, constraints)
83    }
84}
rasn/types/strings/numeric.rs

rasn/types/strings/
numeric.rs
