| use crate::io::{self, IoSlice, IoSliceMut}; |
| use crate::mem::ManuallyDrop; |
| use crate::sys::fd::WasiFd; |
| |
| pub struct Stdin; |
| pub struct Stdout; |
| pub struct Stderr; |
| |
| impl Stdin { |
| pub fn new() -> io::Result<Stdin> { |
| Ok(Stdin) |
| } |
| |
| pub fn read(&self, data: &mut [u8]) -> io::Result<usize> { |
| self.read_vectored(&mut [IoSliceMut::new(data)]) |
| } |
| |
| pub fn read_vectored(&self, data: &mut [IoSliceMut<'_>]) -> io::Result<usize> { |
| ManuallyDrop::new(unsafe { WasiFd::from_raw(self.as_raw_fd()) }).read(data) |
| } |
| |
| pub fn as_raw_fd(&self) -> u32 { |
| 0 |
| } |
| } |
| |
| impl Stdout { |
| pub fn new() -> io::Result<Stdout> { |
| Ok(Stdout) |
| } |
| |
| pub fn write(&self, data: &[u8]) -> io::Result<usize> { |
| self.write_vectored(&[IoSlice::new(data)]) |
| } |
| |
| pub fn write_vectored(&self, data: &[IoSlice<'_>]) -> io::Result<usize> { |
| ManuallyDrop::new(unsafe { WasiFd::from_raw(self.as_raw_fd()) }).write(data) |
| } |
| |
| pub fn flush(&self) -> io::Result<()> { |
| Ok(()) |
| } |
| |
| pub fn as_raw_fd(&self) -> u32 { |
| 1 |
| } |
| } |
| |
| impl Stderr { |
| pub fn new() -> io::Result<Stderr> { |
| Ok(Stderr) |
| } |
| |
| pub fn write(&self, data: &[u8]) -> io::Result<usize> { |
| self.write_vectored(&[IoSlice::new(data)]) |
| } |
| |
| pub fn write_vectored(&self, data: &[IoSlice<'_>]) -> io::Result<usize> { |
| ManuallyDrop::new(unsafe { WasiFd::from_raw(self.as_raw_fd()) }).write(data) |
| } |
| |
| pub fn flush(&self) -> io::Result<()> { |
| Ok(()) |
| } |
| |
| pub fn as_raw_fd(&self) -> u32 { |
| 2 |
| } |
| } |
| |
| impl io::Write for Stderr { |
| fn write(&mut self, data: &[u8]) -> io::Result<usize> { |
| (&*self).write(data) |
| } |
| |
| fn flush(&mut self) -> io::Result<()> { |
| (&*self).flush() |
| } |
| } |
| |
| pub const STDIN_BUF_SIZE: usize = crate::sys_common::io::DEFAULT_BUF_SIZE; |
| |
| pub fn is_ebadf(err: &io::Error) -> bool { |
| err.raw_os_error() == Some(wasi::ERRNO_BADF.into()) |
| } |
| |
| pub fn panic_output() -> Option<impl io::Write> { |
| Stderr::new().ok() |
| } |