use super::*;
use crate::error::strings::InvalidPrintableString;
use alloc::{borrow::ToOwned, boxed::Box, string::String, vec::Vec};
use once_cell::race::OnceBox;
#[derive(Debug, Default, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
#[allow(clippy::module_name_repetitions)]
pub struct PrintableString(Vec<u8>);
static CHARACTER_MAP: OnceBox<alloc::collections::BTreeMap<u32, u32>> = OnceBox::new();
static INDEX_MAP: OnceBox<alloc::collections::BTreeMap<u32, u32>> = OnceBox::new();
impl StaticPermittedAlphabet for PrintableString {
const CHARACTER_SET: &'static [u32] = &bytes_to_chars([
b'A', b'B', b'C', b'D', b'E', b'F', b'G', b'H', b'I', b'J', b'K', b'L', b'M', b'N', b'O',
b'P', b'Q', b'R', b'S', b'T', b'U', b'V', b'W', b'X', b'Y', b'Z', b'a', b'b', b'c', b'd',
b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l', b'm', b'n', b'o', b'p', b'q', b'r', b's',
b't', b'u', b'v', b'w', b'x', b'y', b'z', b'0', b'1', b'2', b'3', b'4', b'5', b'6', b'7',
b'8', b'9', b' ', b'\'', b'(', b')', b'+', b',', b'-', b'.', b'/', b':', b'=', b'?',
]);
fn push_char(&mut self, ch: u32) {
debug_assert!(
Self::CHARACTER_SET.contains(&ch),
"{ch} not in character set"
);
self.0.push(ch as u8);
}
fn chars(&self) -> Box<dyn Iterator<Item = u32> + '_> {
Box::from(self.0.iter().map(|byte| *byte as u32))
}
fn index_map() -> &'static alloc::collections::BTreeMap<u32, u32> {
INDEX_MAP.get_or_init(Self::build_index_map)
}
fn character_map() -> &'static alloc::collections::BTreeMap<u32, u32> {
CHARACTER_MAP.get_or_init(Self::build_character_map)
}
}
impl PrintableString {
pub fn from_bytes(bytes: &[u8]) -> Result<Self, InvalidPrintableString> {
bytes.iter().copied().map(u32::from).try_for_each(|byte| {
if Self::CHARACTER_SET.contains(&byte) {
Ok(())
} else {
Err(InvalidPrintableString { character: byte })
}
})?;
Ok(Self(bytes.to_owned()))
}
#[must_use]
pub fn as_bytes(&self) -> &[u8] {
&self.0
}
}
impl TryFrom<String> for PrintableString {
type Error = InvalidPrintableString;
fn try_from(value: String) -> Result<Self, Self::Error> {
Self::from_bytes(value.as_bytes())
}
}
impl TryFrom<alloc::vec::Vec<u8>> for PrintableString {
type Error = InvalidPrintableString;
fn try_from(value: alloc::vec::Vec<u8>) -> Result<Self, Self::Error> {
Self::from_bytes(&value)
}
}
impl TryFrom<&'_ [u8]> for PrintableString {
type Error = InvalidPrintableString;
fn try_from(value: &[u8]) -> Result<Self, Self::Error> {
Self::from_bytes(value)
}
}
impl TryFrom<&'_ str> for PrintableString {
type Error = InvalidPrintableString;
fn try_from(value: &str) -> Result<Self, Self::Error> {
Self::from_bytes(value.as_bytes())
}
}
impl AsnType for PrintableString {
const TAG: Tag = Tag::PRINTABLE_STRING;
}
impl Encode for PrintableString {
fn encode_with_tag_and_constraints<E: Encoder>(
&self,
encoder: &mut E,
tag: Tag,
constraints: Constraints,
) -> Result<(), E::Error> {
encoder
.encode_printable_string(tag, constraints, self)
.map(drop)
}
}
impl Decode for PrintableString {
fn decode_with_tag_and_constraints<D: Decoder>(
decoder: &mut D,
tag: Tag,
constraints: Constraints,
) -> Result<Self, D::Error> {
decoder.decode_printable_string(tag, constraints)
}
}