pub fn decode<R, W>(input: R, output: W) -> io::Result<()>
where
    R: Read,
    W: Write,
{
    let mut input = BufReader::new(input);
    let header_len = 256;
    let mut header = vec![0; header_len];
    if header_len != input.read(&mut header)? {
        return Err(io::Error::new(io::ErrorKind::InvalidData,
                                  "Could not read header"));
    }
    let tree = tree_from_header(&header);
    let mut n_symbols = [0; 8];
    if 8 != input.read(&mut n_symbols)? {
        return Err(io::Error::new(io::ErrorKind::InvalidData,
                                  "Could not read header"));
    }
    let n_symbols = u64::from_le_bytes(n_symbols);
    let mut factory = SymbolFactory::new(&tree, n_symbols);
    let mut output = BufWriter::new(output);
    loop {
        let buf = input.fill_buf()?;
        let length = buf.len();
        if length == 0 {
            break;
        }
        let decoded = factory.decode_bytes(buf);
        output.write_all(&decoded)?;
        input.consume(length);
    }
    output.flush()?;
    if !factory.is_finished() {
        return Err(io::Error::new(io::ErrorKind::UnexpectedEof,
                                  "Missing symbols to decode"));
    }
    Ok(())
}
/// Decode a given stream, assuming it has a well formed and
/// meaningful header describing the used Huffman code.
Decode a given stream, assuming it has a well formed and
meaningful header describing the used Huffman code.
Decode a given stream assuming it has a well formed and meaningful header describing the used Huffman code .
pub fn decode<R, W>(input: R, output: W) -> io::Result<()>
where
    R: Read,
    W: Write,
{
    let mut input = BufReader::new(input);
    let header_len = 256;
    let mut header = vec![0; header_len];
    if header_len != input.read(&mut header)? {
        return Err(io::Error::new(io::ErrorKind::InvalidData,
                                  "Could not read header"));
    }
    let tree = tree_from_header(&header);
    let mut n_symbols = [0; 8];
    if 8 != input.read(&mut n_symbols)? {
        return Err(io::Error::new(io::ErrorKind::InvalidData,
                                  "Could not read header"));
    }
    let n_symbols = u64::from_le_bytes(n_symbols);
    let mut factory = SymbolFactory::new(&tree, n_symbols);
    let mut output = BufWriter::new(output);
    loop {
        let buf = input.fill_buf()?;
        let length = buf.len();
        if length == 0 {
            break;
        }
        let decoded = factory.decode_bytes(buf);
        output.write_all(&decoded)?;
        input.consume(length);
    }
    output.flush()?;
    if !factory.is_finished() {
        return Err(io::Error::new(io::ErrorKind::UnexpectedEof,
                                  "Missing symbols to decode"));
    }
    Ok(())
}
pub fn decode < R , W > ( input : R , output : W ) -> io :: Result < ( ) > where R : Read , W : Write , { let mut input = BufReader :: new ( input ) ; let header_len = 256 ; let mut header = vec ! [ 0 header_len ] ; if header_len != input . read ( & mut header ) ? { return Err ( io :: Error :: new ( io :: ErrorKind :: InvalidData , " " ) ) ; } let tree = tree_from_header ( & header ) ; let mut n_symbols = [ 0 ; 8 ] ; if 8 != input . read ( & mut n_symbols ) ? { return Err ( io :: Error :: new ( io :: ErrorKind :: InvalidData , " " ) ) ; } let n_symbols = u64 :: from_le_bytes ( n_symbols ) ; let mut factory = SymbolFactory :: new ( & tree , n_symbols ) ; let mut output = BufWriter :: new ( output ) ; loop { let buf = input . fill_buf ( ) ? ; let length = buf . len ( ) ; if length == 0 { break ; } let decoded = factory . decode_bytes ( buf ) ; output . write_all ( & decoded ) ? ; input . consume ( length ) ; } output . flush ( ) ? ; if ! factory . is_finished ( ) { return Err ( io :: Error :: new ( io :: ErrorKind :: UnexpectedEof , " " ) ) ; } Ok ( ( ) ) }
Decode a given stream, assuming it has a well formed and
meaningful header describing the used Huffman code.
Decode a given stream assuming it has a well formed and meaningful header describing the used Huffman code .
input
R
output
W
input
R
output
W