Struct BackwardsReader

Source

pub struct BackwardsReader<'a> { /* private fields */ }

Expand description

Reads file backwards to efficiently retrieve the last N lines

§Examples

let mut writer = BufWriter::new(std::io::stdout());
let mut reader = BackwardsReader::new(10, &mut writer);
reader.read_all(&mut writer);
writer.flush().unwrap();

Implementations§

Source §

impl<'a> BackwardsReader<'a>

Source

pub fn new(num_of_lines: usize, fd: &'a mut BufReader<File>) -> Self

Examples found in repository ?

examples/read_lines.rs (line 11)

7fn main() {
8    let filename = std::env::args().nth(1).unwrap_or("/var/log/syslog".to_string());
9    let fd = File::open(filename).unwrap();
10    let mut fd = BufReader::new(fd);
11    let mut reader = BackwardsReader::new(10, &mut fd);
12
13    let mut out = BufWriter::new(std::io::stdout());
14    reader.read_all(&mut out);
15}

Source

pub fn read_all<T: Write>(&mut self, writer: &mut BufWriter<T>)

Examples found in repository ?

examples/read_lines.rs (line 14)

7fn main() {
8    let filename = std::env::args().nth(1).unwrap_or("/var/log/syslog".to_string());
9    let fd = File::open(filename).unwrap();
10    let mut fd = BufReader::new(fd);
11    let mut reader = BackwardsReader::new(10, &mut fd);
12
13    let mut out = BufWriter::new(std::io::stdout());
14    reader.read_all(&mut out);
15}