statime-wire 0.1.0

use crate::{Error, common::Timestamp};

/// Delay request message body
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct DelayReqMessage {
    /// Time this delay request was sent.
    pub origin_timestamp: Timestamp,
}

impl DelayReqMessage {
    pub(crate) fn content_size(&self) -> usize {
        10
    }

    pub(crate) fn serialize_content(&self, buffer: &mut [u8]) -> Result<(), Error> {
        self.origin_timestamp
            .serialize(buffer.get_mut(0..10).ok_or(Error::BufferTooShort)?)?;

        Ok(())
    }

    pub(crate) fn deserialize_content(buffer: &[u8]) -> Result<Self, Error> {
        let slice = buffer.get(0..10).ok_or(Error::BufferTooShort)?;
        let origin_timestamp = Timestamp::deserialize(slice)?;

        Ok(Self { origin_timestamp })
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn timestamp_wireformat() {
        let representations = [(
            [0x00, 0x00, 0x45, 0xb1, 0x11, 0x5a, 0x0a, 0x64, 0xfa, 0xb0],
            DelayReqMessage {
                origin_timestamp: Timestamp::new(1_169_232_218, 174_389_936).unwrap(),
            },
        )];

        for (byte_representation, object_representation) in representations {
            // Test the serialization output
            let mut serialization_buffer = [0; 10];
            object_representation
                .serialize_content(&mut serialization_buffer)
                .unwrap();
            assert_eq!(serialization_buffer, byte_representation);

            // Test the deserialization output
            let deserialized_data =
                DelayReqMessage::deserialize_content(&byte_representation).unwrap();
            assert_eq!(deserialized_data, object_representation);
        }
    }
}