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use crate::io::{self, IoSlice, IoSliceMut}; use crate::mem::ManuallyDrop; use crate::sys::fd::FileDesc; pub struct Stdin(()); pub struct Stdout(()); pub struct Stderr(()); impl Stdin { pub const fn new() -> Stdin { Stdin(()) } } impl io::Read for Stdin { fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { ManuallyDrop::new(FileDesc::new(libc::STDIN_FILENO)).read(buf) } fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> { ManuallyDrop::new(FileDesc::new(libc::STDIN_FILENO)).read_vectored(bufs) } #[inline] fn is_read_vectored(&self) -> bool { true } } impl Stdout { pub const fn new() -> Stdout { Stdout(()) } } impl io::Write for Stdout { fn write(&mut self, buf: &[u8]) -> io::Result<usize> { ManuallyDrop::new(FileDesc::new(libc::STDOUT_FILENO)).write(buf) } fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> { ManuallyDrop::new(FileDesc::new(libc::STDOUT_FILENO)).write_vectored(bufs) } #[inline] fn is_write_vectored(&self) -> bool { true } fn flush(&mut self) -> io::Result<()> { Ok(()) } } impl Stderr { pub const fn new() -> Stderr { Stderr(()) } } impl io::Write for Stderr { fn write(&mut self, buf: &[u8]) -> io::Result<usize> { ManuallyDrop::new(FileDesc::new(libc::STDERR_FILENO)).write(buf) } fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> { ManuallyDrop::new(FileDesc::new(libc::STDERR_FILENO)).write_vectored(bufs) } #[inline] fn is_write_vectored(&self) -> bool { true } fn flush(&mut self) -> io::Result<()> { Ok(()) } } pub fn is_ebadf(err: &io::Error) -> bool { err.raw_os_error() == Some(libc::EBADF as i32) } pub const STDIN_BUF_SIZE: usize = crate::sys_common::io::DEFAULT_BUF_SIZE; pub fn panic_output() -> Option<impl io::Write> { Some(Stderr::new()) }