der/
writer.rs

1//! Writer trait.
2
3#[cfg(feature = "pem")]
4pub(crate) mod pem;
5pub(crate) mod slice;
6
7use crate::Result;
8
9#[cfg(feature = "std")]
10use std::io;
11
12/// Writer trait which outputs encoded DER.
13pub trait Writer {
14    /// Write the given DER-encoded bytes as output.
15    fn write(&mut self, slice: &[u8]) -> Result<()>;
16
17    /// Write a single byte.
18    fn write_byte(&mut self, byte: u8) -> Result<()> {
19        self.write(&[byte])
20    }
21}
22
23#[cfg(feature = "std")]
24#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
25impl<W: io::Write> Writer for W {
26    fn write(&mut self, slice: &[u8]) -> Result<()> {
27        <Self as io::Write>::write(self, slice)?;
28        Ok(())
29    }
30}