src/vendor/termion/src/sys/unix/mod.rs

   1 extern crate libc;
   2
   3 use std::io;
   4
   5 pub use self::libc::termios as Termios;
   6
   7 pub mod attr;
   8 pub mod size;
   9 pub mod tty;
  10
  11 // Support functions for converting libc return values to io errors {
  12 trait IsMinusOne {
  13     fn is_minus_one(&self) -> bool;
  14 }
  15
  16 macro_rules! impl_is_minus_one {
  17         ($($t:ident)*) => ($(impl IsMinusOne for $t {
  18             fn is_minus_one(&self) -> bool {
  19                 *self == -1
  20             }
  21         })*)
  22     }
  23
  24 impl_is_minus_one! { i8 i16 i32 i64 isize }
  25
  26 fn cvt<T: IsMinusOne>(t: T) -> io::Result<T> {
  27     if t.is_minus_one() {
  28         Err(io::Error::last_os_error())
  29     } else {
  30         Ok(t)
  31     }
  32 }
  33 // } End of support functions