rasn/types/strings/
ia5.rs

1use super::{
2    constrained, AsnType, Constraints, Decode, Decoder, Encode, Encoder, Identifier,
3    PermittedAlphabetError, StaticPermittedAlphabet, Tag,
4};
5
6use alloc::{borrow::ToOwned, vec::Vec};
7use once_cell::race::OnceBox;
8
9/// A string which only contains ASCII characters.
10#[derive(Debug, Default, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
11pub struct Ia5String(pub(super) Vec<u8>);
12static CHARACTER_MAP: OnceBox<alloc::collections::BTreeMap<u32, u32>> = OnceBox::new();
13static INDEX_MAP: OnceBox<alloc::collections::BTreeMap<u32, u32>> = OnceBox::new();
14
15impl Ia5String {
16    /// Attempts to convert the provided bytes into [Self].
17    ///
18    /// # Errors
19    /// If any of the provided bytes does not match the allowed character set.
20    pub fn from_iso646_bytes(bytes: &[u8]) -> Result<Self, PermittedAlphabetError> {
21        Ok(Self(Self::try_from_slice(bytes)?))
22    }
23
24    /// Provides a slice of bytes representing the current value.
25    #[must_use]
26    pub fn as_iso646_bytes(&self) -> &[u8] {
27        &self.0
28    }
29}
30
31impl core::fmt::Display for Ia5String {
32    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
33        f.write_str(core::str::from_utf8(self.as_iso646_bytes()).unwrap())
34    }
35}
36
37impl super::StaticPermittedAlphabet for Ia5String {
38    type T = u8;
39    const CHARACTER_SET: &'static [u32] = &[
40        0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,
41        0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D,
42        0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C,
43        0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B,
44        0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A,
45        0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
46        0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
47        0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
48        0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
49    ];
50    const CHARACTER_SET_NAME: constrained::CharacterSetName = constrained::CharacterSetName::IA5;
51
52    fn chars(&self) -> impl Iterator<Item = u32> + '_ {
53        self.0.iter().map(|&byte| byte as u32)
54    }
55
56    fn push_char(&mut self, ch: u32) {
57        self.0.push(ch as u8);
58    }
59
60    fn index_map() -> &'static alloc::collections::BTreeMap<u32, u32> {
61        INDEX_MAP.get_or_init(Self::build_index_map)
62    }
63
64    fn character_map() -> &'static alloc::collections::BTreeMap<u32, u32> {
65        CHARACTER_MAP.get_or_init(Self::build_character_map)
66    }
67}
68
69impl AsnType for Ia5String {
70    const TAG: Tag = Tag::IA5_STRING;
71    const IDENTIFIER: Identifier = Identifier::IA5_STRING;
72}
73
74impl Encode for Ia5String {
75    fn encode_with_tag_and_constraints<'b, E: Encoder<'b>>(
76        &self,
77        encoder: &mut E,
78        tag: Tag,
79        constraints: Constraints,
80        identifier: Identifier,
81    ) -> Result<(), E::Error> {
82        encoder
83            .encode_ia5_string(tag, constraints, self, identifier)
84            .map(drop)
85    }
86}
87
88impl Decode for Ia5String {
89    fn decode_with_tag_and_constraints<D: Decoder>(
90        decoder: &mut D,
91        tag: Tag,
92        constraints: Constraints,
93    ) -> Result<Self, D::Error> {
94        decoder.decode_ia5_string(tag, constraints)
95    }
96}
97
98impl From<Ia5String> for crate::types::OctetString {
99    fn from(value: Ia5String) -> Self {
100        value.0.into()
101    }
102}
103
104impl From<Ia5String> for alloc::string::String {
105    fn from(value: Ia5String) -> Self {
106        Self::from_utf8(value.as_iso646_bytes().to_owned()).unwrap()
107    }
108}
rasn/types/strings/ia5.rs

rasn/types/strings/
ia5.rs
