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mod data;
mod error;
mod fd_data;
mod id;
mod remote;
use crate::sys;
pub use data::DataFrame;
pub use error::ErrorFrame;
pub use fd_data::FdDataFrame;
pub use id::Id;
pub use remote::RemoteFrame;
use std::mem::{size_of, size_of_val, MaybeUninit};
use std::os::raw::c_void;
#[non_exhaustive]
#[derive(Clone, Copy, Debug)]
#[cfg_attr(test, derive(PartialEq))]
pub enum Frame {
Data(DataFrame),
FdData(FdDataFrame),
Remote(RemoteFrame),
#[doc(hidden)]
Error(ErrorFrame),
}
impl Frame {
pub(crate) unsafe fn from_raw(
frame: MaybeUninit<sys::canfd_frame>,
size: usize,
) -> Option<Self> {
if size == size_of::<sys::can_frame>() {
let inner = *(frame.as_ptr() as *const sys::can_frame);
if inner.can_id & sys::CAN_RTR_FLAG != 0 {
Some(Self::Remote(RemoteFrame(inner)))
} else if inner.can_id & sys::CAN_ERR_FLAG != 0 {
Some(Self::Error(ErrorFrame(inner)))
} else {
Some(Self::Data(DataFrame(inner)))
}
} else if size == size_of::<sys::canfd_frame>() {
let inner = frame.assume_init();
assert_eq!(inner.can_id & (sys::CAN_RTR_FLAG | sys::CAN_ERR_FLAG), 0);
Some(Self::FdData(FdDataFrame(inner)))
} else {
None
}
}
pub(crate) fn as_ptr(&self) -> *const c_void {
match self {
Self::Data(DataFrame(inner))
| Self::Remote(RemoteFrame(inner))
| Self::Error(ErrorFrame(inner)) => inner as *const _ as _,
Self::FdData(FdDataFrame(inner)) => inner as *const _ as _,
}
}
pub(crate) fn size(&self) -> usize {
match self {
Self::Data(DataFrame(inner))
| Self::Remote(RemoteFrame(inner))
| Self::Error(ErrorFrame(inner)) => size_of_val(inner),
Self::FdData(FdDataFrame(inner)) => size_of_val(inner),
}
}
}
#[cfg(test)]
mod tests;