use byteorder::{ReadBytesExt, WriteBytesExt};
use snafu::ResultExt;
use std::io;
use std::io::{Read, Write};
use crate::{error, Endian, Result, TryFrom, WithFixedPayloadLength};
#[repr(u16)]
#[derive(Clone, Debug, PartialEq)]
pub enum DeviceCapability {
ParametersLimit = 0,
JobLimit = 1,
InstructionChunkLimit = 2,
}
impl WithFixedPayloadLength for DeviceCapability {
const FIXED_PAYLOAD_LENGTH: u16 = u16::FIXED_PAYLOAD_LENGTH;
}
impl TryFrom<u16> for DeviceCapability {
type Err = io::Error;
fn try_from(value: u16) -> io::Result<Self> {
match value {
0 => Ok(DeviceCapability::ParametersLimit),
1 => Ok(DeviceCapability::JobLimit),
2 => Ok(DeviceCapability::InstructionChunkLimit),
_ => Err(io::Error::new(
io::ErrorKind::InvalidData,
format!("Invalid DeviceCapability enum value {}", value),
)),
}
}
}
pub(crate) trait DeviceCapabilityWriterExt: Write {
fn write_device_capability(
&mut self,
device_capability: &DeviceCapability,
) -> io::Result<()> {
self.write_u16::<Endian>(device_capability.clone() as u16)
}
}
impl<B: Write + ?Sized> DeviceCapabilityWriterExt for B {}
pub(crate) trait DeviceCapabilityReaderExt: Read {
fn read_device_capability(&mut self) -> Result<DeviceCapability> {
let value = self.read_u16::<Endian>().context(error::Io)?;
DeviceCapability::try_from(value).context(error::Io)
}
}
impl<B: Read + ?Sized> DeviceCapabilityReaderExt for B {}