Struct Entry 

pub struct Entry<'a, R: 'a + Read> { /* private fields */ }

Representation of an archive entry.

Entry objects implement the Read trait, and can be used to extract the data from this archive entry. If the underlying reader supports the Seek trait, then the Entry object supports Seek as well.

Implementations

impl<'a, R: 'a + Read> Entry<'a, R>

pub fn header(&self) -> &Header

Returns the header for this archive entry.

Examples found in repository

examples/extract.rs (line 39)

fn main() {
    let num_args = env::args().count();
    if num_args != 2 {
        println!("Usage: extract <path/to/archive.a>");
        return;
    }

    let input_path = env::args().nth(1).unwrap();
    let input_path = Path::new(&input_path);
    let input_file =
        File::open(input_path).expect("failed to open input file");
    let mut archive = ar::Archive::new(input_file);

    while let Some(entry) = archive.next_entry() {
        let mut entry = entry.expect("failed to parse archive entry");
        let output_path = Path::new(
            str::from_utf8(entry.header().identifier())
                .expect("Non UTF-8 filename"),
        )
        .to_path_buf();
        let mut output_file = File::create(&output_path)
            .expect(&format!("unable to create file {:?}", output_path));
        io::copy(&mut entry, &mut output_file)
            .expect(&format!("failed to extract file {:?}", output_path));
    }
}

Trait Implementations

impl<'a, R: 'a + Read> Drop for Entry<'a, R>

fn drop(&mut self)

Executes the destructor for this type.

impl<'a, R: 'a + Read> Read for Entry<'a, R>

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Reader has an efficient read_vectored implementation.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Reads all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Reads all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Reads the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Reads the exact number of bytes required to fill cursor.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

where Self: Sized,

Transforms this Read instance to an Iterator over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>

where R: Read, Self: Sized,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

where Self: Sized,

Creates an adapter which will read at most limit bytes from it.

impl<'a, R: 'a + Read + Seek> Seek for Entry<'a, R>

fn seek(&mut self, pos: SeekFrom) -> Result<u64>

Seek to an offset, in bytes, in a stream.

fn rewind(&mut self) -> Result<(), Error>

Rewind to the beginning of a stream.

fn stream_len(&mut self) -> Result<u64, Error>

🔬This is a nightly-only experimental API. (seek_stream_len)

Returns the length of this stream (in bytes).

fn stream_position(&mut self) -> Result<u64, Error>

Returns the current seek position from the start of the stream.

fn seek_relative(&mut self, offset: i64) -> Result<(), Error>

Seeks relative to the current position.