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#![no_std]
#[cfg(unix)]
extern crate libc;
#[cfg(windows)]
extern crate winapi;
mod sys;
use core::ops;
use core::marker::PhantomData;
#[cfg(unix)]
pub mod unix;
pub const MAX_LENGTH: usize = sys::MAX_LENGTH;
pub struct IoVec<'a> {
sys: sys::IoVec,
_p: PhantomData<&'a [u8]>,
}
pub struct IoVecMut<'a> {
sys: sys::IoVec,
_p: PhantomData<&'a mut [u8]>,
}
impl<'a> IoVec<'a> {
pub fn from_bytes(slice: &'a [u8]) -> Self {
IoVec {
sys: unsafe { sys::IoVec::from_bytes(slice) },
_p: PhantomData,
}
}
pub fn from_mut_slice<'b>(slice: &'b [IoVecMut<'a>]) -> &'b [Self] {
unsafe { ::core::mem::transmute(slice) }
}
pub fn borrow(&self) -> IoVec {
IoVec {
sys: self.sys.clone(),
_p: PhantomData,
}
}
}
impl<'a> ops::Deref for IoVec<'a> {
type Target = [u8];
fn deref(&self) -> &[u8] {
self.sys.as_ref()
}
}
impl<'a> From<&'a [u8]> for IoVec<'a> {
fn from(bytes: &'a [u8]) -> Self {
IoVec::from_bytes(bytes)
}
}
impl<'a> Default for IoVec<'a> {
fn default() -> Self {
IoVec {
sys: sys::IoVec::default(),
_p: PhantomData,
}
}
}
impl<'a> IoVecMut<'a> {
pub fn from_bytes(slice: &'a mut [u8]) -> Self {
IoVecMut {
sys: unsafe { sys::IoVec::from_bytes_mut(slice) },
_p: PhantomData,
}
}
pub fn borrow(&self) -> IoVec {
IoVec {
sys: self.sys.clone(),
_p: PhantomData,
}
}
pub fn borrow_mut(&mut self) -> IoVecMut {
IoVecMut {
sys: self.sys.clone(),
_p: PhantomData,
}
}
}
impl<'a> ops::Deref for IoVecMut<'a> {
type Target = [u8];
fn deref(&self) -> &[u8] {
&self.sys.as_ref()
}
}
impl<'a> ops::DerefMut for IoVecMut<'a> {
fn deref_mut(&mut self) -> &mut [u8] {
self.sys.as_mut()
}
}
impl<'a> From<&'a mut [u8]> for IoVecMut<'a> {
fn from(bytes: &'a mut [u8]) -> Self {
IoVecMut::from_bytes(bytes)
}
}
impl<'a> Default for IoVecMut<'a> {
fn default() -> Self {
IoVecMut {
sys: sys::IoVec::default(),
_p: PhantomData,
}
}
}
#[cfg(test)]
mod test {
extern crate std;
use self::std::vec::Vec;
use super::{IoVec, IoVecMut};
#[test]
fn convert_ref() {
let buf: IoVec = (&b"hello world"[..]).into();
assert_eq!(buf[..], b"hello world"[..]);
}
#[test]
fn convert_mut() {
let mut buf: Vec<u8> = b"hello world".to_vec();
let buf: IoVecMut = (&mut buf[..]).into();
assert_eq!(buf[..], b"hello world"[..]);
}
#[test]
fn default() {
let buf: IoVec = IoVec::default();
assert_eq!(buf[..], b""[..]);
}
}