| use crate::io; |
| use crate::sys::{ReadSysCall, WriteSysCall}; |
| |
| pub struct Stdin; |
| pub struct Stdout; |
| pub struct Stderr; |
| |
| impl Stdin { |
| pub fn new() -> io::Result<Stdin> { |
| Ok(Stdin) |
| } |
| } |
| |
| impl io::Read for Stdin { |
| fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { |
| Ok(ReadSysCall::perform(0, buf)) |
| } |
| } |
| |
| impl Stdout { |
| pub fn new() -> io::Result<Stdout> { |
| Ok(Stdout) |
| } |
| } |
| |
| impl io::Write for Stdout { |
| fn write(&mut self, buf: &[u8]) -> io::Result<usize> { |
| WriteSysCall::perform(1, buf); |
| Ok(buf.len()) |
| } |
| |
| fn flush(&mut self) -> io::Result<()> { |
| Ok(()) |
| } |
| } |
| |
| impl Stderr { |
| pub fn new() -> io::Result<Stderr> { |
| Ok(Stderr) |
| } |
| } |
| |
| impl io::Write for Stderr { |
| fn write(&mut self, buf: &[u8]) -> io::Result<usize> { |
| WriteSysCall::perform(2, buf); |
| Ok(buf.len()) |
| } |
| |
| fn flush(&mut self) -> io::Result<()> { |
| Ok(()) |
| } |
| } |
| |
| pub const STDIN_BUF_SIZE: usize = 0; |
| |
| pub fn is_ebadf(_err: &io::Error) -> bool { |
| true |
| } |
| |
| pub fn panic_output() -> Option<impl io::Write> { |
| if cfg!(feature = "wasm_syscall") { |
| Stderr::new().ok() |
| } else { |
| None |
| } |
| } |