Janis
3aa8ecbd77
- switching from Cell to RefCell for NodePtr - deep cloneing and destroying of trees - BoxedNode is a NonNull now instead of an Rc - implemented Read for `&[u8]`
77 lines
2.1 KiB
Rust
77 lines
2.1 KiB
Rust
pub mod error {
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use thiserror::Error;
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#[derive(Debug, Error)]
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pub enum Error {
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#[error("read failed")]
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ReadFailed,
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#[error("invalid magic signature")]
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InvalidMagic,
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#[error("invalid offset")]
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InvalidOffset,
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#[error("Expected an internal node")]
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ExpectedInternalNode,
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#[error("Expected a leaf node")]
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ExpectedLeafNode,
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#[error("Failed to read with logical offset")]
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BadLogicalAddress,
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#[error("Default subvolume root could not be found")]
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NoDefaultSubvolRoot,
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#[error("Default subvolume root fs tree could not be found")]
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NoDefaultSubvolFsRoot,
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#[error("INode could not be found in FsTree")]
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INodeNotFound,
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#[error("attempted to access {index}th item out of bounds {range:?}")]
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OutOfBounds {
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range: core::ops::Range<usize>,
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index: usize,
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},
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#[error("Invalid checksum: expected {expected:#?} but got {actual:#?}")]
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InvalidChecksum {
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expected: [u8; 32],
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actual: [u8; 32],
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},
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#[error("{0}")]
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ScrollError(scroll::Error),
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}
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impl From<scroll::Error> for Error {
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fn from(value: scroll::Error) -> Self {
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Self::ScrollError(value)
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}
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}
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pub type Result<T> = core::result::Result<T, Error>;
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}
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pub trait Read {
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fn read(&self, dst: &mut [u8], address: u64) -> error::Result<()>;
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fn alignment(&self) -> usize {
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1
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}
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}
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impl Read for &[u8] {
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fn read(&self, dst: &mut [u8], address: u64) -> error::Result<()> {
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let src = self
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.get(address as usize..address as usize + dst.len())
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.ok_or(error::Error::ReadFailed)?;
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dst.copy_from_slice(src);
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Ok(())
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}
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}
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#[cfg(all(any(feature = "std", test), unix))]
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impl Read for std::fs::File {
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fn read(&self, dst: &mut [u8], address: u64) -> error::Result<()> {
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use std::os::unix::prelude::FileExt;
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self.read_at(dst, address)
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.map_err(|_| error::Error::ReadFailed)?;
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Ok(())
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}
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}
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pub mod file;
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pub mod tree;
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pub mod volume;
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