haggis-rs/src/special.rs

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870 B
Rust
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2023-07-04 00:51:47 -04:00
use {
crate::Error,
std::io::{Read, Write},
};
#[derive(Debug)]
pub struct Special {
pub major: u32,
pub minor: u32,
}
impl Special {
pub fn read<T: Read>(reader: &mut T) -> Result<Self, Error> {
let mut buf = [0; 8];
reader.read_exact(&mut buf)?;
let major: [u8; 4] = buf[..4].try_into()?;
let major = u32::from_le_bytes(major);
let minor: [u8; 4] = buf[4..].try_into()?;
let minor = u32::from_le_bytes(minor);
Ok(Self { major, minor })
}
pub fn write<T: Write>(&self, writer: &mut T) -> Result<(), Error> {
writer.write_all(&self.major.to_le_bytes())?;
writer.write_all(&self.minor.to_le_bytes())?;
Ok(())
}
pub(super) fn from_rdev(rdev: u32) -> Self {
Self {
major: rdev >> 8,
minor: rdev & 0xff,
}
}
}