Replace iovec with std::io::IoSlice

.travis.yml

@@ -3,7 +3,8 @@ dist: trusty
 language: rust
 services: docker
 sudo: required
-rust: stable
+#rust: stable
+rust: beta # we need 1.36, which is still beta
 
 env:
   global:
@@ -19,7 +20,7 @@ matrix:
     #
     # This job will also build and deploy the docs to gh-pages.
     - env: TARGET=x86_64-unknown-linux-gnu
-      rust: 1.28.0
+      #rust: 1.36.0 (not stable yet)
       after_success:
         - |
             pip install 'travis-cargo<0.2' --user &&

Cargo.toml

@@ -30,7 +30,6 @@ features = ["i128"]
 
 [dependencies]
 byteorder = "1.1.0"
-iovec = { git = "https://github.com/carllerche/iovec" }
 serde = { version = "1.0", optional = true }
 either = { version = "1.5", default-features = false, optional = true }
 

src/buf/buf.rs

@@ -1,8 +1,7 @@
 use super::{IntoBuf, Take, Reader, FromBuf, Chain};
 use byteorder::{BigEndian, ByteOrder, LittleEndian};
-use iovec::IoVec;
 
-use std::{cmp, ptr};
+use std::{cmp, io::IoSlice, ptr};
 
 macro_rules! buf_get_impl {
     ($this:ident, $size:expr, $conv:path) => ({
@@ -119,14 +118,14 @@ pub trait Buf {
     /// Fills `dst` with potentially multiple slices starting at `self`'s
     /// current position.
     ///
-    /// If the `Buf` is backed by disjoint slices of bytes, `bytes_vec` enables
-    /// fetching more than one slice at once. `dst` is a slice of `IoVec`
+    /// If the `Buf` is backed by disjoint slices of bytes, `bytes_vectored` enables
+    /// fetching more than one slice at once. `dst` is a slice of `IoSlice`
     /// references, enabling the slice to be directly used with [`writev`]
     /// without any further conversion. The sum of the lengths of all the
     /// buffers in `dst` will be less than or equal to `Buf::remaining()`.
     ///
     /// The entries in `dst` will be overwritten, but the data **contained** by
-    /// the slices **will not** be modified. If `bytes_vec` does not fill every
+    /// the slices **will not** be modified. If `bytes_vectored` does not fill every
     /// entry in `dst`, then `dst` is guaranteed to contain all remaining slices
     /// in `self.
     ///
@@ -136,20 +135,20 @@ pub trait Buf {
     /// # Implementer notes
     ///
     /// This function should never panic. Once the end of the buffer is reached,
-    /// i.e., `Buf::remaining` returns 0, calls to `bytes_vec` must return 0
+    /// i.e., `Buf::remaining` returns 0, calls to `bytes_vectored` must return 0
     /// without mutating `dst`.
     ///
     /// Implementations should also take care to properly handle being called
     /// with `dst` being a zero length slice.
     ///
     /// [`writev`]: http://man7.org/linux/man-pages/man2/readv.2.html
-    fn bytes_vec<'a>(&'a self, dst: &mut [IoVec<'a>]) -> usize {
+    fn bytes_vectored<'a>(&'a self, dst: &mut [IoSlice<'a>]) -> usize {
         if dst.is_empty() {
             return 0;
         }
 
         if self.has_remaining() {
-            dst[0] = self.bytes().into();
+            dst[0] = IoSlice::new(self.bytes());
             1
         } else {
             0
@@ -926,8 +925,8 @@ impl<'a, T: Buf + ?Sized> Buf for &'a mut T {
         (**self).bytes()
     }
 
-    fn bytes_vec<'b>(&'b self, dst: &mut [IoVec<'b>]) -> usize {
-        (**self).bytes_vec(dst)
+    fn bytes_vectored<'b>(&'b self, dst: &mut [IoSlice<'b>]) -> usize {
+        (**self).bytes_vectored(dst)
     }
 
     fn advance(&mut self, cnt: usize) {
@@ -944,8 +943,8 @@ impl<T: Buf + ?Sized> Buf for Box<T> {
         (**self).bytes()
     }
 
-    fn bytes_vec<'b>(&'b self, dst: &mut [IoVec<'b>]) -> usize {
-        (**self).bytes_vec(dst)
+    fn bytes_vectored<'b>(&'b self, dst: &mut [IoSlice<'b>]) -> usize {
+        (**self).bytes_vectored(dst)
     }
 
     fn advance(&mut self, cnt: usize) {

src/buf/buf_mut.rs

@@ -1,8 +1,7 @@
 use super::{IntoBuf, Writer};
 use byteorder::{LittleEndian, ByteOrder, BigEndian};
-use iovec::IoVecMut;
 
-use std::{cmp, ptr, usize};
+use std::{cmp, io::IoSliceMut, ptr, usize};
 
 /// A trait for values that provide sequential write access to bytes.
 ///
@@ -162,15 +161,15 @@ pub trait BufMut {
     /// Fills `dst` with potentially multiple mutable slices starting at `self`'s
     /// current position.
     ///
-    /// If the `BufMut` is backed by disjoint slices of bytes, `bytes_vec_mut`
+    /// If the `BufMut` is backed by disjoint slices of bytes, `bytes_vectored_mut`
     /// enables fetching more than one slice at once. `dst` is a slice of
-    /// mutable `IoVec` references, enabling the slice to be directly used with
+    /// mutable `IoSliceMut` references, enabling the slice to be directly used with
     /// [`readv`] without any further conversion. The sum of the lengths of all
     /// the buffers in `dst` will be less than or equal to
     /// `Buf::remaining_mut()`.
     ///
     /// The entries in `dst` will be overwritten, but the data **contained** by
-    /// the slices **will not** be modified. If `bytes_vec_mut` does not fill every
+    /// the slices **will not** be modified. If `bytes_vectored_mut` does not fill every
     /// entry in `dst`, then `dst` is guaranteed to contain all remaining slices
     /// in `self.
     ///
@@ -180,20 +179,20 @@ pub trait BufMut {
     /// # Implementer notes
     ///
     /// This function should never panic. Once the end of the buffer is reached,
-    /// i.e., `BufMut::remaining_mut` returns 0, calls to `bytes_vec_mut` must
+    /// i.e., `BufMut::remaining_mut` returns 0, calls to `bytes_vectored_mut` must
     /// return 0 without mutating `dst`.
     ///
     /// Implementations should also take care to properly handle being called
     /// with `dst` being a zero length slice.
     ///
     /// [`readv`]: http://man7.org/linux/man-pages/man2/readv.2.html
-    unsafe fn bytes_vec_mut<'a>(&'a mut self, dst: &mut [IoVecMut<'a>]) -> usize {
+    unsafe fn bytes_vectored_mut<'a>(&'a mut self, dst: &mut [IoSliceMut<'a>]) -> usize {
         if dst.is_empty() {
             return 0;
         }
 
         if self.has_remaining_mut() {
-            dst[0] = self.bytes_mut().into();
+            dst[0] = IoSliceMut::new(self.bytes_mut());
             1
         } else {
             0
@@ -989,8 +988,8 @@ impl<'a, T: BufMut + ?Sized> BufMut for &'a mut T {
         (**self).bytes_mut()
     }
 
-    unsafe fn bytes_vec_mut<'b>(&'b mut self, dst: &mut [IoVecMut<'b>]) -> usize {
-        (**self).bytes_vec_mut(dst)
+    unsafe fn bytes_vectored_mut<'b>(&'b mut self, dst: &mut [IoSliceMut<'b>]) -> usize {
+        (**self).bytes_vectored_mut(dst)
     }
 
     unsafe fn advance_mut(&mut self, cnt: usize) {
@@ -1007,8 +1006,8 @@ impl<T: BufMut + ?Sized> BufMut for Box<T> {
         (**self).bytes_mut()
     }
 
-    unsafe fn bytes_vec_mut<'b>(&'b mut self, dst: &mut [IoVecMut<'b>]) -> usize {
-        (**self).bytes_vec_mut(dst)
+    unsafe fn bytes_vectored_mut<'b>(&'b mut self, dst: &mut [IoSliceMut<'b>]) -> usize {
+        (**self).bytes_vectored_mut(dst)
     }
 
     unsafe fn advance_mut(&mut self, cnt: usize) {

src/buf/chain.rs

@@ -1,6 +1,6 @@
 use {Buf, BufMut};
 use buf::IntoIter;
-use iovec::{IoVec, IoVecMut};
+use std::io::{IoSlice, IoSliceMut};
 
 /// A `Chain` sequences two buffers.
 ///
@@ -178,9 +178,9 @@ impl<T, U> Buf for Chain<T, U>
         self.b.advance(cnt);
     }
 
-    fn bytes_vec<'a>(&'a self, dst: &mut [IoVec<'a>]) -> usize {
-        let mut n = self.a.bytes_vec(dst);
-        n += self.b.bytes_vec(&mut dst[n..]);
+    fn bytes_vectored<'a>(&'a self, dst: &mut [IoSlice<'a>]) -> usize {
+        let mut n = self.a.bytes_vectored(dst);
+        n += self.b.bytes_vectored(&mut dst[n..]);
         n
     }
 }
@@ -219,9 +219,9 @@ impl<T, U> BufMut for Chain<T, U>
         self.b.advance_mut(cnt);
     }
 
-    unsafe fn bytes_vec_mut<'a>(&'a mut self, dst: &mut [IoVecMut<'a>]) -> usize {
-        let mut n = self.a.bytes_vec_mut(dst);
-        n += self.b.bytes_vec_mut(&mut dst[n..]);
+    unsafe fn bytes_vectored_mut<'a>(&'a mut self, dst: &mut [IoSliceMut<'a>]) -> usize {
+        let mut n = self.a.bytes_vectored_mut(dst);
+        n += self.b.bytes_vectored_mut(&mut dst[n..]);
         n
     }
 }

src/either.rs

@@ -4,7 +4,7 @@ use {Buf, BufMut};
 
 use self::either::Either;
 use self::either::Either::*;
-use iovec::{IoVec, IoVecMut};
+use std::io::{IoSlice, IoSliceMut};
 
 impl<L, R> Buf for Either<L, R>
 where
@@ -25,10 +25,10 @@ where
         }
     }
 
-    fn bytes_vec<'a>(&'a self, dst: &mut [IoVec<'a>]) -> usize {
+    fn bytes_vectored<'a>(&'a self, dst: &mut [IoSlice<'a>]) -> usize {
         match *self {
-            Left(ref b) => b.bytes_vec(dst),
-            Right(ref b) => b.bytes_vec(dst),
+            Left(ref b) => b.bytes_vectored(dst),
+            Right(ref b) => b.bytes_vectored(dst),
         }
     }
 
@@ -66,10 +66,10 @@ where
         }
     }
 
-    unsafe fn bytes_vec_mut<'a>(&'a mut self, dst: &mut [IoVecMut<'a>]) -> usize {
+    unsafe fn bytes_vectored_mut<'a>(&'a mut self, dst: &mut [IoSliceMut<'a>]) -> usize {
         match *self {
-            Left(ref mut b) => b.bytes_vec_mut(dst),
-            Right(ref mut b) => b.bytes_vec_mut(dst),
+            Left(ref mut b) => b.bytes_vectored_mut(dst),
+            Right(ref mut b) => b.bytes_vectored_mut(dst),
         }
     }
 

src/lib.rs

@@ -72,7 +72,6 @@
 #![doc(html_root_url = "https://docs.rs/bytes/0.5.0")]
 
 extern crate byteorder;
-extern crate iovec;
 
 pub mod buf;
 pub use buf::{

tests/test_buf.rs

@@ -1,9 +1,8 @@
 extern crate bytes;
 extern crate byteorder;
-extern crate iovec;
 
 use bytes::Buf;
-use iovec::IoVec;
+use std::io::IoSlice;
 
 #[test]
 fn test_fresh_cursor_vec() {
@@ -48,11 +47,10 @@ fn test_get_u16_buffer_underflow() {
 fn test_bufs_vec() {
     let buf = &b"hello world"[..];
 
-    let b1: &[u8] = &mut [0];
-    let b2: &[u8] = &mut [0];
+    let b1: &[u8] = &mut [];
+    let b2: &[u8] = &mut [];
 
-    let mut dst: [IoVec; 2] =
-        [b1.into(), b2.into()];
+    let mut dst = [IoSlice::new(b1), IoSlice::new(b2)];
 
-    assert_eq!(1, buf.bytes_vec(&mut dst[..]));
+    assert_eq!(1, buf.bytes_vectored(&mut dst[..]));
 }

tests/test_buf_mut.rs

@@ -1,11 +1,10 @@
 extern crate bytes;
 extern crate byteorder;
-extern crate iovec;
 
 use bytes::{BufMut, BytesMut};
-use iovec::IoVecMut;
 use std::usize;
 use std::fmt::Write;
+use std::io::IoSliceMut;
 
 #[test]
 fn test_vec_as_mut_buf() {
@@ -72,13 +71,13 @@ fn test_clone() {
 
 #[test]
 fn test_bufs_vec_mut() {
-    use std::mem;
-
     let mut buf = BytesMut::from(&b"hello world"[..]);
+    let b1: &mut [u8] = &mut [];
+    let b2: &mut [u8] = &mut [];
+    let mut dst = [IoSliceMut::new(b1), IoSliceMut::new(b2)];
 
     unsafe {
-        let mut dst: [IoVecMut; 2] = mem::zeroed();
-        assert_eq!(1, buf.bytes_vec_mut(&mut dst[..]));
+        assert_eq!(1, buf.bytes_vectored_mut(&mut dst[..]));
     }
 }