concat_reader

Trait FileConcatRead

Source 
pub trait FileConcatRead: ConcatRead {
    // Required method
    fn file_path(&self) -> Option<&Path>;
}
Expand description

FileConcatRead is a kind of ConcatRead which can provide information about the file currently read.

§Example

use std::io;
use std::io::prelude::*;
use std::path::Path;
use crate::concat_reader::*;

fn main() -> io::Result<()> {
    let files = vec!["/path/to/file_1", "/path/to/file_2", "/path/to/file_3"];
    let mut f = concat_path(files);
    assert!(f.file_path().is_none());
    let mut buffer = [0; 10];
    f.read(&mut buffer)?;
    assert_eq!(f.file_path(), Some(Path::new("/path/to/file_1")));
    Ok(())
}

Required Methods§

Source

fn file_path(&self) -> Option<&Path>

Returns the path to the current File being read from.

use std::io;
use std::io::prelude::*;
use crate::concat_reader::*;

fn main() -> io::Result<()> {
    let files = vec!["/path/to/file_1", "/path/to/file_2", "/path/to/file_3"];
    let mut f = concat_path(files);

    let mut buffer = [0; 1];
    //read 1 bytes from the reader
    f.read_exact(&mut buffer);
    println!("read from {}", f.file_path().unwrap().display());

    //skip to next file in reader
    f.skip();
    ///     //read 1 bytes from the reader
    f.read_exact(&mut buffer);
    println!("read from {}", f.file_path().unwrap().display());
    Ok(())
}

Implementors§