literustlib 0.4.0

Rust parser for LiteNetLib packets
Documentation 
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#[derive(Debug, Clone, Copy)]
pub struct Fragment {
    pub id: u16,
    pub part: u16,
    pub total: u16,
}

impl Fragment {
    pub(crate) const SIZE: usize = 6;

    pub(crate) fn parse(slice: &[u8]) -> std::io::Result<Self> {
        // assumed it's in a packet header context (i.e. slice[0] is the packet's flag byte)
        if slice.len() >= 9 {
            let id = u16::from_le_bytes([slice[3], slice[4]]);
            let part = u16::from_le_bytes([slice[5], slice[6]]);
            let total = u16::from_le_bytes([slice[7], slice[8]]);
            Ok(Self {
                id,
                part,
                total,
            })
        } else {
            Err(std::io::Error::new(std::io::ErrorKind::InvalidData, "Data to parse is not long enough for fragment"))
        }
    }

    pub(crate) fn dump<W: std::io::Write>(&self, writer: &mut W) -> std::io::Result<usize> {
        writer.write_all(&self.id.to_le_bytes())?;
        writer.write_all(&self.part.to_le_bytes())?;
        writer.write_all(&self.total.to_le_bytes())?;
        Ok(Self::SIZE)
    }

    pub(crate) fn is_valid(&self) -> bool {
        self.part < self.total
    }
}