Trait PatchSource 

pub trait PatchSource {
    // Required method
    fn read(&mut self, patch: u32, offset: u64, dst: &mut [u8]) -> Result<()>;
}

Source of patch-file bytes for an IndexApplier.

Implementations must fill dst completely with dst.len() source bytes starting at offset in the patch identified by patch. A short read — fewer than dst.len() bytes available — must surface as ZiPatchError::PatchSourceTooShort, not as a partial fill. An out-of-range patch must surface as ZiPatchError::PatchIndexOutOfRange.

Required Methods

fn read(&mut self, patch: u32, offset: u64, dst: &mut [u8]) -> Result<()>

Fill dst with dst.len() source bytes starting at offset in the patch indexed by patch.

Errors

• ZiPatchError::PatchIndexOutOfRange — patch is >= count.
• ZiPatchError::PatchSourceTooShort — the source has fewer than dst.len() bytes at offset in patch patch.
• ZiPatchError::Io — underlying I/O failure (only meaningful for sources backed by real I/O, e.g. FilePatchSource).

Implementors

impl PatchSource for FilePatchSource