moq-transport 0.12.0

Media over QUIC
Documentation 
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use std::{io, sync};

use super::BoundsExceeded;

pub trait Encode: Sized {
    fn encode<W: bytes::BufMut>(&self, w: &mut W) -> Result<(), EncodeError>;

    // Helper function to make sure we have enough bytes to encode
    fn encode_remaining<W: bytes::BufMut>(buf: &mut W, required: usize) -> Result<(), EncodeError> {
        let needed = required.saturating_sub(buf.remaining_mut());
        if needed > 0 {
            Err(EncodeError::More(needed))
        } else {
            Ok(())
        }
    }
}

/// An encode error.
#[derive(thiserror::Error, Debug, Clone)]
pub enum EncodeError {
    #[error("short buffer")]
    More(usize),

    #[error("varint too large")]
    BoundsExceeded(#[from] BoundsExceeded),

    #[error("invalid value")]
    InvalidValue,

    #[error("field '{0}' missing")]
    MissingField(String),

    #[error("i/o error: {0}")]
    Io(sync::Arc<io::Error>),

    #[error("message too large")]
    MsgBoundsExceeded,

    #[error("field '{0}' too large")]
    FieldBoundsExceeded(String),
}

impl From<io::Error> for EncodeError {
    fn from(err: io::Error) -> Self {
        Self::Io(sync::Arc::new(err))
    }
}