/// Opens a library for reading.
Opens a library for reading.
Opens a library for reading .
fn open(data_dir: &Path, library: &Path) -> io::Result<Self> {
        let library_path = find_file(&data_dir, &library)?;
        let mut library_file = File::open(&library_path)?;
        let header = SlfHeader::from_input(&mut library_file)?;
        let base_path = Nfc::caseless_path(&header.library_path);
        let mut entries: Vec<_> = header
            .entries_from_input(&mut library_file)?
            .iter()
            .filter_map(|slf_entry| match slf_entry.state {
                SlfEntryState::Ok => Some(LibraryEntry {
                    file_path: Nfc::caseless_path(&slf_entry.file_path),
                    data_start: u64::from(slf_entry.offset),
                    data_end: u64::from(slf_entry.offset) + u64::from(slf_entry.length),
                }),
                _ => None,
            }) // LibraryEntry
            .collect();
        entries.sort();
        let mut unique = HashSet::new();
        for entry in &entries {
            if !unique.insert(&entry.file_path) {
                let path = base_path + &entry.file_path;
                return Err(io::Error::new(
                    io::ErrorKind::InvalidData,
                    format!(
                        "{:?} has multiple entries with path {:?}",
                        library_path, path
                    ),
                ));
            }
        }
        Ok(Library {
            library_path,
            library_file,
            base_path,
            entries,
        })
    }
fn open ( data_dir : & Path , library : & Path ) -> io :: Result < Self > { let library_path = find_file ( & data_dir , & library ) ? ; let mut library_file = File :: open ( & library_path ) ? ; let header = SlfHeader :: from_input ( & mut library_file ) ? ; let base_path = Nfc :: caseless_path ( & header . library_path ) ; let mut entries : Vec < _ > = header . entries_from_input ( & mut library_file ) ? . iter ( ) . filter_map ( | slf_entry | match slf_entry . state { SlfEntryState :: Ok => Some ( LibraryEntry { file_path : Nfc :: caseless_path ( & slf_entry . file_path ) , data_start : u64 :: from ( slf_entry . offset ) , data_end : u64 :: from ( slf_entry . offset ) + u64 :: from ( slf_entry . length ) , } ) , _ => None , } ) // LibraryEntry . collect ( ) ; entries . sort ( ) ; let mut unique = HashSet :: new ( ) ; for entry in & entries { if ! unique . insert ( & entry . file_path ) { let path = base_path + & entry . file_path ; return Err ( io :: Error :: new ( io :: ErrorKind :: InvalidData , format ! ( " " library_path path ) , ) ) ; } } Ok ( Library { library_path , library_file , base_path , entries , } ) }
Opens a library for reading.
Opens a library for reading .
data_dir
&Path
library
&Path