Function open_patch 

pub fn open_patch(
    path: impl AsRef<Path>,
) -> ParseResult<ZiPatchReader<impl Read + 'static>>

Open the file at path and validate the ZiPatch magic, returning a ready-to-iterate ZiPatchReader.

The concrete inner reader type is intentionally hidden behind impl Read so the choice of source and any buffering strategy remain implementation details. Callers that need to name the type should construct a reader of their choice and pass it to ZiPatchReader::new.

Errors

• ParseError::Io — the file could not be opened.
• ParseError::InvalidMagic — the file does not start with the ZiPatch magic bytes.