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// TODO: split out this error
use crate::ValidateNodeError;
use bstr::ByteSlice;
use std::fmt::{self, Debug, Display};
/// A wrapper type for symlink targets.
/// Internally uses a [bytes::Bytes], but disallows empty targets and those
/// containing null bytes.
#[repr(transparent)]
#[derive(Clone, PartialEq, Eq)]
pub struct SymlinkTarget {
inner: bytes::Bytes,
}
impl AsRef<[u8]> for SymlinkTarget {
fn as_ref(&self) -> &[u8] {
self.inner.as_ref()
}
}
impl From<SymlinkTarget> for bytes::Bytes {
fn from(value: SymlinkTarget) -> Self {
value.inner
}
}
impl TryFrom<bytes::Bytes> for SymlinkTarget {
type Error = ValidateNodeError;
fn try_from(value: bytes::Bytes) -> Result<Self, Self::Error> {
if value.is_empty() || value.contains(&b'\0') {
return Err(ValidateNodeError::InvalidSymlinkTarget(value));
}
Ok(Self { inner: value })
}
}
impl TryFrom<&'static [u8]> for SymlinkTarget {
type Error = ValidateNodeError;
fn try_from(value: &'static [u8]) -> Result<Self, Self::Error> {
if value.is_empty() || value.contains(&b'\0') {
return Err(ValidateNodeError::InvalidSymlinkTarget(
bytes::Bytes::from_static(value),
));
}
Ok(Self {
inner: bytes::Bytes::from_static(value),
})
}
}
impl TryFrom<&str> for SymlinkTarget {
type Error = ValidateNodeError;
fn try_from(value: &str) -> Result<Self, Self::Error> {
if value.is_empty() {
return Err(ValidateNodeError::InvalidSymlinkTarget(
bytes::Bytes::copy_from_slice(value.as_bytes()),
));
}
Ok(Self {
inner: bytes::Bytes::copy_from_slice(value.as_bytes()),
})
}
}
impl Debug for SymlinkTarget {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
Debug::fmt(self.inner.as_bstr(), f)
}
}
impl Display for SymlinkTarget {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
Display::fmt(self.inner.as_bstr(), f)
}
}
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