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use super::Errno;
use core::fmt;
use core::num::NonZeroU16;
/// A raw error returned by wasi APIs, internally containing a 16-bit error
/// code.
#[derive(Copy, Clone, PartialEq, Eq, Ord, PartialOrd)]
pub struct Error {
code: NonZeroU16,
}
impl Error {
/// Constructs a new error from a raw error code, returning `None` if the
/// error code is zero (which means success).
pub fn from_raw_error(error: Errno) -> Option<Error> {
Some(Error {
code: NonZeroU16::new(error)?,
})
}
/// Returns the raw error code that this error represents.
pub fn raw_error(&self) -> u16 {
self.code.get()
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"{} (error {})",
super::strerror(self.code.get()),
self.code
)?;
Ok(())
}
}
impl fmt::Debug for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("Error")
.field("code", &self.code)
.field("message", &super::strerror(self.code.get()))
.finish()
}
}
#[cfg(feature = "std")]
extern crate std;
#[cfg(feature = "std")]
impl std::error::Error for Error {}
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