use super::HeaderError;
use crate::err::LenError;
#[derive(Clone, Debug, Eq, PartialEq, Hash)]
pub enum HeaderSliceError {
Len(LenError),
Content(HeaderError),
}
impl HeaderSliceError {
#[inline]
pub const fn add_slice_offset(self, offset: usize) -> Self {
use HeaderSliceError::*;
match self {
Len(err) => Len(err.add_offset(offset)),
Content(err) => Content(err),
}
}
}
impl core::fmt::Display for HeaderSliceError {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
use HeaderSliceError::*;
match self {
Len(err) => err.fmt(f),
Content(err) => err.fmt(f),
}
}
}
#[cfg(feature = "std")]
#[cfg_attr(docsrs, doc(cfg(feature = "std")))]
impl std::error::Error for HeaderSliceError {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
match self {
HeaderSliceError::Len(err) => Some(err),
HeaderSliceError::Content(err) => Some(err),
}
}
}
#[cfg(test)]
mod tests {
use super::{HeaderSliceError::*, *};
use crate::{err::Layer, LenSource};
use alloc::format;
use std::{
collections::hash_map::DefaultHasher,
error::Error,
hash::{Hash, Hasher},
};
#[test]
fn add_slice_offset() {
use HeaderSliceError::*;
assert_eq!(
Len(LenError {
required_len: 1,
layer: Layer::Icmpv4,
len: 2,
len_source: LenSource::Slice,
layer_start_offset: 3
})
.add_slice_offset(200),
Len(LenError {
required_len: 1,
layer: Layer::Icmpv4,
len: 2,
len_source: LenSource::Slice,
layer_start_offset: 203
})
);
assert_eq!(
Content(HeaderError::DataOffsetTooSmall { data_offset: 1 }).add_slice_offset(200),
Content(HeaderError::DataOffsetTooSmall { data_offset: 1 })
);
}
#[test]
fn debug() {
let err = HeaderError::DataOffsetTooSmall { data_offset: 1 };
assert_eq!(
format!("Content({:?})", err.clone()),
format!("{:?}", Content(err))
);
}
#[test]
fn clone_eq_hash() {
let err = Content(HeaderError::DataOffsetTooSmall { data_offset: 1 });
assert_eq!(err, err.clone());
let hash_a = {
let mut hasher = DefaultHasher::new();
err.hash(&mut hasher);
hasher.finish()
};
let hash_b = {
let mut hasher = DefaultHasher::new();
err.clone().hash(&mut hasher);
hasher.finish()
};
assert_eq!(hash_a, hash_b);
}
#[test]
fn fmt() {
{
let err = LenError {
required_len: 1,
layer: Layer::Icmpv4,
len: 2,
len_source: LenSource::Slice,
layer_start_offset: 3,
};
assert_eq!(format!("{}", &err), format!("{}", Len(err)));
}
{
let err = HeaderError::DataOffsetTooSmall { data_offset: 1 };
assert_eq!(format!("{}", &err), format!("{}", Content(err.clone())));
}
}
#[cfg(feature = "std")]
#[test]
fn source() {
assert!(Len(LenError {
required_len: 1,
layer: Layer::Icmpv4,
len: 2,
len_source: LenSource::Slice,
layer_start_offset: 3
})
.source()
.is_some());
assert!(Content(HeaderError::DataOffsetTooSmall { data_offset: 1 })
.source()
.is_some());
}
}