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-rw-r--r--src/system/io/impls.rs275
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diff --git a/src/system/io/impls.rs b/src/system/io/impls.rs
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--- a/src/system/io/impls.rs
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-// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use std::cmp;
-use std::io::{self, SeekFrom, Read, Write, Seek, BufRead, Error, ErrorKind};
-use std::fmt;
-use std::mem;
-
-// =============================================================================
-// Forwarding implementations
-
-impl<'a, R: Read + ?Sized> Read for &'a mut R {
- #[inline]
- fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
- (**self).read(buf)
- }
-
- #[inline]
- fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
- (**self).read_to_end(buf)
- }
-
- #[inline]
- fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
- (**self).read_to_string(buf)
- }
-
- #[inline]
- fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
- (**self).read_exact(buf)
- }
-}
-impl<'a, W: Write + ?Sized> Write for &'a mut W {
- #[inline]
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> { (**self).write(buf) }
-
- #[inline]
- fn flush(&mut self) -> io::Result<()> { (**self).flush() }
-
- #[inline]
- fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
- (**self).write_all(buf)
- }
-
- #[inline]
- fn write_fmt(&mut self, fmt: fmt::Arguments) -> io::Result<()> {
- (**self).write_fmt(fmt)
- }
-}
-impl<'a, S: Seek + ?Sized> Seek for &'a mut S {
- #[inline]
- fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> { (**self).seek(pos) }
-}
-impl<'a, B: BufRead + ?Sized> BufRead for &'a mut B {
- #[inline]
- fn fill_buf(&mut self) -> io::Result<&[u8]> { (**self).fill_buf() }
-
- #[inline]
- fn consume(&mut self, amt: usize) { (**self).consume(amt) }
-
- #[inline]
- fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> io::Result<usize> {
- (**self).read_until(byte, buf)
- }
-
- #[inline]
- fn read_line(&mut self, buf: &mut String) -> io::Result<usize> {
- (**self).read_line(buf)
- }
-}
-
-impl<R: Read + ?Sized> Read for Box<R> {
- #[inline]
- fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
- (**self).read(buf)
- }
-
- #[inline]
- fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
- (**self).read_to_end(buf)
- }
-
- #[inline]
- fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
- (**self).read_to_string(buf)
- }
-
- #[inline]
- fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
- (**self).read_exact(buf)
- }
-}
-impl<W: Write + ?Sized> Write for Box<W> {
- #[inline]
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> { (**self).write(buf) }
-
- #[inline]
- fn flush(&mut self) -> io::Result<()> { (**self).flush() }
-
- #[inline]
- fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
- (**self).write_all(buf)
- }
-
- #[inline]
- fn write_fmt(&mut self, fmt: fmt::Arguments) -> io::Result<()> {
- (**self).write_fmt(fmt)
- }
-}
-impl<S: Seek + ?Sized> Seek for Box<S> {
- #[inline]
- fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> { (**self).seek(pos) }
-}
-impl<B: BufRead + ?Sized> BufRead for Box<B> {
- #[inline]
- fn fill_buf(&mut self) -> io::Result<&[u8]> { (**self).fill_buf() }
-
- #[inline]
- fn consume(&mut self, amt: usize) { (**self).consume(amt) }
-
- #[inline]
- fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> io::Result<usize> {
- (**self).read_until(byte, buf)
- }
-
- #[inline]
- fn read_line(&mut self, buf: &mut String) -> io::Result<usize> {
- (**self).read_line(buf)
- }
-}
-
-// =============================================================================
-// In-memory buffer implementations
-
-impl<'a> Read for &'a [u8] {
- #[inline]
- fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
- let amt = cmp::min(buf.len(), self.len());
- let (a, b) = self.split_at(amt);
- buf[..amt].copy_from_slice(a);
- *self = b;
- Ok(amt)
- }
-
- #[inline]
- fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
- if buf.len() > self.len() {
- return Err(Error::new(ErrorKind::UnexpectedEof,
- "failed to fill whole buffer"));
- }
- let (a, b) = self.split_at(buf.len());
- buf.copy_from_slice(a);
- *self = b;
- Ok(())
- }
-}
-
-impl<'a> BufRead for &'a [u8] {
- #[inline]
- fn fill_buf(&mut self) -> io::Result<&[u8]> { Ok(*self) }
-
- #[inline]
- fn consume(&mut self, amt: usize) { *self = &self[amt..]; }
-}
-
-impl<'a> Write for &'a mut [u8] {
- #[inline]
- fn write(&mut self, data: &[u8]) -> io::Result<usize> {
- let amt = cmp::min(data.len(), self.len());
- let (a, b) = mem::replace(self, &mut []).split_at_mut(amt);
- a.copy_from_slice(&data[..amt]);
- *self = b;
- Ok(amt)
- }
-
- #[inline]
- fn write_all(&mut self, data: &[u8]) -> io::Result<()> {
- if self.write(data)? == data.len() {
- Ok(())
- } else {
- Err(Error::new(ErrorKind::WriteZero, "failed to write whole buffer"))
- }
- }
-
- #[inline]
- fn flush(&mut self) -> io::Result<()> { Ok(()) }
-}
-
-impl Write for Vec<u8> {
- #[inline]
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
- self.extend_from_slice(buf);
- Ok(buf.len())
- }
-
- #[inline]
- fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
- self.extend_from_slice(buf);
- Ok(())
- }
-
- #[inline]
- fn flush(&mut self) -> io::Result<()> { Ok(()) }
-}
-
-#[cfg(test)]
-mod tests {
- use io::prelude::*;
- use test;
-
- use collections::Vec;
-
- #[bench]
- fn bench_read_slice(b: &mut test::Bencher) {
- let buf = [5; 1024];
- let mut dst = [0; 128];
-
- b.iter(|| {
- let mut rd = &buf[..];
- for _ in 0..8 {
- let _ = rd.read(&mut dst);
- test::black_box(&dst);
- }
- })
- }
-
- #[bench]
- fn bench_write_slice(b: &mut test::Bencher) {
- let mut buf = [0; 1024];
- let src = [5; 128];
-
- b.iter(|| {
- let mut wr = &mut buf[..];
- for _ in 0..8 {
- let _ = wr.write_all(&src);
- test::black_box(&wr);
- }
- })
- }
-
- #[bench]
- fn bench_read_vec(b: &mut test::Bencher) {
- let buf = vec![5; 1024];
- let mut dst = [0; 128];
-
- b.iter(|| {
- let mut rd = &buf[..];
- for _ in 0..8 {
- let _ = rd.read(&mut dst);
- test::black_box(&dst);
- }
- })
- }
-
- #[bench]
- fn bench_write_vec(b: &mut test::Bencher) {
- let mut buf = Vec::with_capacity(1024);
- let src = [5; 128];
-
- b.iter(|| {
- let mut wr = &mut buf[..];
- for _ in 0..8 {
- let _ = wr.write_all(&src);
- test::black_box(&wr);
- }
- })
- }
-}
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