src/libstd/sys/wasm/stdio.rs

   1 use crate::io;
   2
   3 pub struct Stdin;
   4 pub struct Stdout;
   5 pub struct Stderr;
   6
   7 impl Stdin {
   8     pub fn new() -> io::Result<Stdin> {
   9         Ok(Stdin)
  10     }
  11 }
  12
  13 impl io::Read for Stdin {
  14     fn read(&mut self, _buf: &mut [u8]) -> io::Result<usize> {
  15         Ok(0)
  16     }
  17 }
  18
  19 impl Stdout {
  20     pub fn new() -> io::Result<Stdout> {
  21         Ok(Stdout)
  22     }
  23 }
  24
  25 impl io::Write for Stdout {
  26     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
  27         Ok(buf.len())
  28     }
  29
  30     fn flush(&mut self) -> io::Result<()> {
  31         Ok(())
  32     }
  33 }
  34
  35 impl Stderr {
  36     pub fn new() -> io::Result<Stderr> {
  37         Ok(Stderr)
  38     }
  39 }
  40
  41 impl io::Write for Stderr {
  42     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
  43         Ok(buf.len())
  44     }
  45
  46     fn flush(&mut self) -> io::Result<()> {
  47         Ok(())
  48     }
  49 }
  50
  51 pub const STDIN_BUF_SIZE: usize = 0;
  52
  53 pub fn is_ebadf(_err: &io::Error) -> bool {
  54     true
  55 }
  56
  57 pub fn panic_output() -> Option<Vec<u8>> {
  58     None
  59 }