use std::io::{self, Write,Result};
use std::ops::Add;
pub trait USIOutputWriter {
fn write(&self,lines:&Vec<String>) -> Result<usize>;
}
pub struct USIStdOutputWriter {
}
impl USIStdOutputWriter {
pub fn new() -> USIStdOutputWriter {
USIStdOutputWriter {
}
}
}
impl USIOutputWriter for USIStdOutputWriter {
fn write(&self,lines:&Vec<String>) -> Result<usize> {
let stdout = io::stdout();
let mut writer = stdout.lock();
writer.write(lines.join("\n").add("\n").as_bytes())
}
}
pub struct VoidOutPutWriter;
impl USIOutputWriter for VoidOutPutWriter {
fn write(&self,_:&Vec<String>) -> Result<usize> {
Ok(0)
}
}
pub struct USIStdErrorWriter {
}
impl USIStdErrorWriter {
pub fn write(s:&str) -> Result<usize> {
let stderr = io::stderr();
let mut h = stderr.lock();
h.write(s.as_bytes())
}
}