Merge pull request clearloop#8 from hulufei/master

Fix panic on stat command with zero numbers

Author: clearloop

src/cmds/stat.rs

@@ -99,8 +99,9 @@ impl Command for StatCommand {
  _ => continue,
  }
 
+ let checked_div = |lhs: f64, rhs: f64| if rhs == 0. { 0. } else { lhs / rhs };
  let count = format!("{}/{}", l.1, l.0);
- let pct = format!("( {:.2} %)", ((100.0 * l.1) / l.0));
+ let pct = format!("( {:.2} %)", checked_div(100.0 * l.1, l.0));
  let mut line = "".to_string();
  line.push_str(&" ".digit(8 - (count.len() as i32)));
  line.push_str(&count);
@@ -109,8 +110,12 @@ impl Command for StatCommand {
  print!("{}", line);
  print!(" ");
 
- let done = "░".repeat(((32.00 * l.1) / l.0) as usize).bright_green();
- let udone = "░".repeat(32 - ((32.00 * l.1) / l.0) as usize).red();
+ let done = "░"
+ .repeat(checked_div(32.00 * l.1, l.0) as usize)
+ .bright_green();
+ let udone = "░"
+ .repeat(32 - checked_div(32.00 * l.1, l.0) as usize)
+ .red();
  print!("{}", done);
  println!("{}", udone);
  }