Struct CatReader

pub struct CatReader<I: IntoIterator> { /* private fields */ }

Adapter for reading through multiple files continuously.

Implementations

impl<I> CatReader<I>

where I: IntoIterator, I::Item: AsRef<Path>,

pub fn new(iter: I) -> CatReader<I>

Creates a new CatReader from an iterator of file names.

Examples found in repository

examples/cat.rs (line 12)

fn main() {
    let mut args = env::args_os();
    args.next();

    let mut buf = [0; 4096];
    let mut reader = CatReader::new(args);
    let mut stdout = io::stdout();
    loop {
        let amt = reader.read(&mut buf).expect("read failed");
        if amt == 0 {
            return;
        }
        stdout.write(&buf[..amt]).expect("write failed");
    }
}

pub fn buffered(iter: I) -> BufReader<CatReader<I>>

Convenience method for creating a BufReader of a CatReader.

impl<I> CatReader<I>

where I: IntoIterator, I::Item: AsRef<Path>, I::IntoIter: Clone,

pub fn try_clone(&self) -> Result<CatReader<I>>

Tries to clone the reader.

Trait Implementations

impl<I> Debug for CatReader<I>

where I: IntoIterator, I::Item: Debug, I::IntoIter: Clone,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<I> Read for CatReader<I>

where I: IntoIterator, I::Item: AsRef<Path>,

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.