5cccf3cd25
This commit is an implementation of [RFC 1184][rfc] which tweaks the behavior of the `#![no_std]` attribute and adds a new `#![no_core]` attribute. The `#![no_std]` attribute now injects `extern crate core` at the top of the crate as well as the libcore prelude into all modules (in the same manner as the standard library's prelude). The `#![no_core]` attribute disables both std and core injection. [rfc]: https://github.com/rust-lang/rfcs/pull/1184
63 lines
1.7 KiB
Rust
63 lines
1.7 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#[cfg(stage0)]
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use prelude::v1::*;
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use io;
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use libc;
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use sys::fd::FileDesc;
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pub struct Stdin(());
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pub struct Stdout(());
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pub struct Stderr(());
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impl Stdin {
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pub fn new() -> io::Result<Stdin> { Ok(Stdin(())) }
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pub fn read(&self, data: &mut [u8]) -> io::Result<usize> {
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let fd = FileDesc::new(libc::STDIN_FILENO);
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let ret = fd.read(data);
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fd.into_raw();
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return ret;
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}
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}
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impl Stdout {
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pub fn new() -> io::Result<Stdout> { Ok(Stdout(())) }
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pub fn write(&self, data: &[u8]) -> io::Result<usize> {
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let fd = FileDesc::new(libc::STDOUT_FILENO);
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let ret = fd.write(data);
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fd.into_raw();
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return ret;
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}
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}
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impl Stderr {
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pub fn new() -> io::Result<Stderr> { Ok(Stderr(())) }
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pub fn write(&self, data: &[u8]) -> io::Result<usize> {
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let fd = FileDesc::new(libc::STDERR_FILENO);
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let ret = fd.write(data);
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fd.into_raw();
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return ret;
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}
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}
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// FIXME: right now this raw stderr handle is used in a few places because
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// std::io::stderr_raw isn't exposed, but once that's exposed this impl
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// should go away
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impl io::Write for Stderr {
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fn write(&mut self, data: &[u8]) -> io::Result<usize> {
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Stderr::write(self, data)
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}
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fn flush(&mut self) -> io::Result<()> { Ok(()) }
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}
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