rasn/types/strings/
numeric.rs

1use super::*;
2
3use crate::error::strings::{InvalidNumericString, PermittedAlphabetError};
4use alloc::{borrow::ToOwned, boxed::Box, string::String, vec::Vec};
5use once_cell::race::OnceBox;
6
7/// A string which can only contain numbers or `SPACE` characters.
8#[derive(Debug, Default, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
9pub struct NumericString(Vec<u8>);
10static CHARACTER_MAP: OnceBox<alloc::collections::BTreeMap<u32, u32>> = OnceBox::new();
11static INDEX_MAP: OnceBox<alloc::collections::BTreeMap<u32, u32>> = OnceBox::new();
12
13impl NumericString {
14    pub fn from_bytes(bytes: &[u8]) -> Result<Self, InvalidNumericString> {
15        bytes.iter().try_for_each(|byte| {
16            if Self::CHARACTER_SET.contains(&(*byte as u32)) {
17                Ok(())
18            } else {
19                Err(InvalidNumericString { character: *byte })
20            }
21        })?;
22
23        Ok(Self(bytes.to_owned()))
24    }
25
26    pub fn as_bytes(&self) -> &[u8] {
27        &self.0
28    }
29}
30
31impl TryFrom<BitString> for NumericString {
32    type Error = PermittedAlphabetError;
33
34    fn try_from(string: BitString) -> Result<Self, Self::Error> {
35        Self::try_from_permitted_alphabet(&string, None)
36    }
37}
38
39impl TryFrom<String> for NumericString {
40    type Error = InvalidNumericString;
41
42    fn try_from(string: String) -> Result<Self, Self::Error> {
43        Self::from_bytes(string.as_bytes())
44    }
45}
46
47impl TryFrom<&'_ str> for NumericString {
48    type Error = InvalidNumericString;
49
50    fn try_from(string: &str) -> Result<Self, Self::Error> {
51        Self::from_bytes(string.as_bytes())
52    }
53}
54
55impl TryFrom<Vec<u8>> for NumericString {
56    type Error = InvalidNumericString;
57
58    fn try_from(string: Vec<u8>) -> Result<Self, Self::Error> {
59        Self::from_bytes(&string)
60    }
61}
62
63impl AsnType for NumericString {
64    const TAG: Tag = Tag::NUMERIC_STRING;
65}
66
67impl Encode for NumericString {
68    fn encode_with_tag_and_constraints<E: Encoder>(
69        &self,
70        encoder: &mut E,
71        tag: Tag,
72        constraints: Constraints,
73    ) -> Result<(), E::Error> {
74        encoder
75            .encode_numeric_string(tag, constraints, self)
76            .map(drop)
77    }
78}
79
80impl Decode for NumericString {
81    fn decode_with_tag_and_constraints<D: Decoder>(
82        decoder: &mut D,
83        tag: Tag,
84        constraints: Constraints,
85    ) -> Result<Self, D::Error> {
86        decoder.decode_numeric_string(tag, constraints)
87    }
88}
89
90impl StaticPermittedAlphabet for NumericString {
91    const CHARACTER_SET: &'static [u32] = &bytes_to_chars([
92        b' ', b'0', b'1', b'2', b'3', b'4', b'5', b'6', b'7', b'8', b'9',
93    ]);
94
95    fn chars(&self) -> Box<dyn Iterator<Item = u32> + '_> {
96        Box::from(self.0.iter().map(|byte| *byte as u32))
97    }
98
99    fn push_char(&mut self, ch: u32) {
100        debug_assert!(
101            Self::CHARACTER_SET.contains(&ch),
102            "{} not in character set",
103            ch
104        );
105        self.0.push(ch as u8);
106    }
107
108    fn index_map() -> &'static alloc::collections::BTreeMap<u32, u32> {
109        INDEX_MAP.get_or_init(Self::build_index_map)
110    }
111
112    fn character_map() -> &'static alloc::collections::BTreeMap<u32, u32> {
113        CHARACTER_MAP.get_or_init(Self::build_character_map)
114    }
115}
rasn/types/strings/numeric.rs

rasn/types/strings/
numeric.rs
