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use crate::io::{self, BorrowedCursor, IoSlice, IoSliceMut};
pub struct Stdin;
pub struct Stdout;
pub type Stderr = Stdout;
impl Stdin {
pub const fn new() -> Stdin {
Stdin
}
}
impl io::Read for Stdin {
#[inline]
fn read(&mut self, _buf: &mut [u8]) -> io::Result<usize> {
Ok(0)
}
#[inline]
fn read_buf(&mut self, _cursor: BorrowedCursor<'_>) -> io::Result<()> {
Ok(())
}
#[inline]
fn read_vectored(&mut self, _bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
Ok(0)
}
#[inline]
fn is_read_vectored(&self) -> bool {
// Do not force `Chain<Empty, T>` or `Chain<T, Empty>` to use vectored
// reads, unless the other reader is vectored.
false
}
#[inline]
fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
if !buf.is_empty() { Err(io::Error::READ_EXACT_EOF) } else { Ok(()) }
}
#[inline]
fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> io::Result<()> {
if cursor.capacity() != 0 { Err(io::Error::READ_EXACT_EOF) } else { Ok(()) }
}
#[inline]
fn read_to_end(&mut self, _buf: &mut Vec<u8>) -> io::Result<usize> {
Ok(0)
}
#[inline]
fn read_to_string(&mut self, _buf: &mut String) -> io::Result<usize> {
Ok(0)
}
}
impl Stdout {
pub const fn new() -> Stdout {
Stdout
}
}
impl io::Write for Stdout {
#[inline]
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
Ok(buf.len())
}
#[inline]
fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {
let total_len = bufs.iter().map(|b| b.len()).sum();
Ok(total_len)
}
#[inline]
fn is_write_vectored(&self) -> bool {
true
}
#[inline]
fn write_all(&mut self, _buf: &[u8]) -> io::Result<()> {
Ok(())
}
#[inline]
fn write_all_vectored(&mut self, _bufs: &mut [IoSlice<'_>]) -> io::Result<()> {
Ok(())
}
// Keep the default write_fmt so the `fmt::Arguments` are still evaluated.
#[inline]
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<Vec<u8>> {
None
}
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