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use crate::ber::bytes_to_u64;
use crate::*;
use core::convert::TryFrom;
#[derive(Debug, PartialEq)]
pub struct Enumerated(pub u32);
impl Enumerated {
pub const fn new(value: u32) -> Self {
Enumerated(value)
}
}
impl<'a> TryFrom<Any<'a>> for Enumerated {
type Error = Error;
fn try_from(any: Any<'a>) -> Result<Enumerated> {
TryFrom::try_from(&any)
}
}
impl<'a, 'b> TryFrom<&'b Any<'a>> for Enumerated {
type Error = Error;
fn try_from(any: &'b Any<'a>) -> Result<Enumerated> {
any.tag().assert_eq(Self::TAG)?;
any.header.assert_primitive()?;
let res_u64 = bytes_to_u64(any.data)?;
if res_u64 > (<u32>::MAX as u64) {
return Err(Error::IntegerTooLarge);
}
let value = res_u64 as u32;
Ok(Enumerated(value))
}
}
impl CheckDerConstraints for Enumerated {
fn check_constraints(any: &Any) -> Result<()> {
any.header.length.assert_definite()?;
Ok(())
}
}
impl DerAutoDerive for Enumerated {}
impl Tagged for Enumerated {
const TAG: Tag = Tag::Enumerated;
}
#[cfg(feature = "std")]
impl ToDer for Enumerated {
fn to_der_len(&self) -> Result<usize> {
Integer::from(self.0).to_der_len()
}
fn write_der_header(&self, writer: &mut dyn std::io::Write) -> SerializeResult<usize> {
let i = Integer::from(self.0);
let len = i.data.len();
let header = Header::new(Class::Universal, false, Self::TAG, Length::Definite(len));
header.write_der_header(writer).map_err(Into::into)
}
fn write_der_content(&self, writer: &mut dyn std::io::Write) -> SerializeResult<usize> {
let int = Integer::from(self.0);
int.write_der_content(writer).map_err(Into::into)
}
}