├── .gitignore ├── .travis.yml ├── CHANGELOG.md ├── Cargo.toml ├── LICENSE-APACHE ├── LICENSE-MIT ├── README.md ├── appveyor.yml └── src ├── lib.rs ├── sys ├── mod.rs ├── unix.rs ├── unknown.rs └── windows.rs ├── unix.rs └── windows.rs /.gitignore: -------------------------------------------------------------------------------- 1 | target 2 | Cargo.lock 3 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | --- 2 | language: rust 3 | sudo: false 4 | 5 | matrix: 6 | include: 7 | # Oldest supported Rust (this should track Mio) 8 | - rust: 1.9.0 9 | script: 10 | - cargo update 11 | # The newest libc no longer compiles on 1.9 12 | - cargo update -p libc --precise 0.2.3 13 | - cargo test 14 | # Oldest supported dependencies 15 | - rust: nightly 16 | script: 17 | - cargo -Z minimal-versions test 18 | - rust: stable 19 | # OS X support 20 | - rust: stable 21 | os: osx 22 | # WebAssembly support. 23 | - rust: beta 24 | script: 25 | - rustup target add wasm32-unknown-unknown 26 | - cargo build --target=wasm32-unknown-unknown 27 | 28 | script: 29 | - cargo build 30 | - cargo test 31 | 32 | notifications: 33 | email: 34 | on_success: never 35 | -------------------------------------------------------------------------------- /CHANGELOG.md: -------------------------------------------------------------------------------- 1 | # 0.2.0 (unknown) 2 | 3 | * Use a more reliable internal struct representation (#9) 4 | 5 | # 0.1.2 (January 26th, 2018) 6 | 7 | * Add support for non-windows/unix targets (#10) 8 | 9 | # 0.1.1 (October 5th, 2017) 10 | 11 | * Fix soundness bug: Assert slice lengths are always > 0 (#5) 12 | 13 | # 0.1.0 (March 14th, 2017) 14 | 15 | * Initial release 16 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "iovec" 3 | version = "0.2.0" 4 | authors = ["Carl Lerche "] 5 | license = "MIT/Apache-2.0" 6 | readme = "README.md" 7 | keywords = ["scatter", "gather", "vectored", "io", "networking"] 8 | repository = "https://github.com/carllerche/iovec" 9 | homepage = "https://github.com/carllerche/iovec" 10 | documentation = "https://docs.rs/iovec" 11 | description = """ 12 | Portable buffer type for scatter/gather I/O operations 13 | """ 14 | categories = ["no-std", "network-programming", "api-bindings"] 15 | 16 | [target.'cfg(unix)'.dependencies] 17 | libc = "0.2.3" 18 | 19 | [target.'cfg(windows)'.dependencies] 20 | winapi = { version = "0.3", features = ["minwindef", "ws2def"] } 21 | -------------------------------------------------------------------------------- /LICENSE-APACHE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /LICENSE-MIT: -------------------------------------------------------------------------------- 1 | Copyright (c) 2018 Carl Lerche 2 | 3 | Permission is hereby granted, free of charge, to any 4 | person obtaining a copy of this software and associated 5 | documentation files (the "Software"), to deal in the 6 | Software without restriction, including without 7 | limitation the rights to use, copy, modify, merge, 8 | publish, distribute, sublicense, and/or sell copies of 9 | the Software, and to permit persons to whom the Software 10 | is furnished to do so, subject to the following 11 | conditions: 12 | 13 | The above copyright notice and this permission notice 14 | shall be included in all copies or substantial portions 15 | of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF 18 | ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 19 | TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 20 | PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT 21 | SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 22 | CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR 24 | IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 25 | DEALINGS IN THE SOFTWARE. 26 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # IoVec 2 | 3 | A specialized byte slice type for performing vectored I/O operations. 4 | 5 | [![Crates.io](https://img.shields.io/crates/v/iovec.svg?maxAge=2592000)](https://crates.io/crates/iovec) 6 | [![Build Status](https://travis-ci.org/carllerche/iovec.svg?branch=master)](https://travis-ci.org/carllerche/iovec) 7 | 8 | [Documentation](https://docs.rs/iovec) 9 | 10 | ## Usage 11 | 12 | To use `iovec`, first add this to your `Cargo.toml`: 13 | 14 | ```toml 15 | [dependencies] 16 | iovec = "0.2" 17 | ``` 18 | 19 | Next, add this to your crate: 20 | 21 | ```rust 22 | extern crate iovec; 23 | 24 | use iovec::IoVec; 25 | ``` 26 | 27 | For more detail, see [documentation](https://docs.rs/iovec). 28 | 29 | # License 30 | 31 | This project is licensed under either of 32 | 33 | * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or 34 | http://www.apache.org/licenses/LICENSE-2.0) 35 | * MIT license ([LICENSE-MIT](LICENSE-MIT) or 36 | http://opensource.org/licenses/MIT) 37 | 38 | at your option. 39 | 40 | ### Contribution 41 | 42 | Unless you explicitly state otherwise, any contribution intentionally submitted 43 | for inclusion in iovec by you, as defined in the Apache-2.0 license, shall be 44 | dual licensed as above, without any additional terms or conditions. 45 | -------------------------------------------------------------------------------- /appveyor.yml: -------------------------------------------------------------------------------- 1 | environment: 2 | matrix: 3 | - TARGET: x86_64-pc-windows-msvc 4 | 5 | install: 6 | - curl -sSf -o rustup-init.exe https://win.rustup.rs/ 7 | - rustup-init.exe -y --default-host %TARGET% 8 | - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin 9 | - rustc -V 10 | - cargo -V 11 | 12 | build: false 13 | 14 | test_script: 15 | - cargo build 16 | - cargo test 17 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | //! A specialized byte slice type for performing vectored I/O operations. 2 | //! 3 | //! For more detail, see [`IoVec`] documentation. 4 | //! 5 | //! [`IoVec`]: struct.IoVec.html 6 | 7 | #![no_std] 8 | 9 | #[cfg(unix)] 10 | extern crate libc; 11 | 12 | #[cfg(windows)] 13 | extern crate winapi; 14 | 15 | mod sys; 16 | 17 | use core::ops; 18 | use core::marker::PhantomData; 19 | 20 | #[cfg(unix)] 21 | pub mod unix; 22 | 23 | /// Max length of an `IoVec` slice. 24 | /// 25 | /// Attempts to convert slices longer than this value will result in a panic. 26 | pub const MAX_LENGTH: usize = sys::MAX_LENGTH; 27 | 28 | /// A specialized byte slice type for performing vectored I/O operations. 29 | /// 30 | /// On all systems, the types needed to perform vectored I/O systems have the 31 | /// same size as Rust's [`slice`]. However, the layout is not necessarily the 32 | /// same. `IoVec` provides a portable compatibility layer. 33 | /// 34 | /// The `IoVec` behaves like a Rust [`slice`], providing the same functions. 35 | /// It also provides conversion functions to and from the OS specific vectored 36 | /// types. 37 | /// 38 | /// [`slice`]: https://doc.rust-lang.org/std/primitive.slice.html 39 | /// 40 | /// # Examples 41 | /// 42 | /// ``` 43 | /// use iovec::IoVec; 44 | /// 45 | /// let mut data = vec![]; 46 | /// data.extend_from_slice(b"hello"); 47 | /// 48 | /// let iovec: IoVec = data.as_slice().into(); 49 | /// 50 | /// assert_eq!(&iovec[..], &b"hello"[..]); 51 | /// ``` 52 | /// 53 | /// # Panics 54 | /// 55 | /// Attempting to convert a zero-length slice or a slice longer than 56 | /// [`MAX_LENGTH`] to an `IoVec` will result in a panic. 57 | /// 58 | /// [`MAX_LENGTH`]: constant.MAX_LENGTH.html 59 | pub struct IoVec<'a> { 60 | sys: sys::IoVec, 61 | _p: PhantomData<&'a [u8]>, 62 | } 63 | 64 | /// Mutable byte slice type for performing vectored I/O operations. 65 | pub struct IoVecMut<'a> { 66 | sys: sys::IoVec, 67 | _p: PhantomData<&'a mut [u8]>, 68 | } 69 | 70 | // ===== impl IoVec ===== 71 | 72 | impl<'a> IoVec<'a> { 73 | /// Convert an `IoVec` from a byte slice 74 | pub fn from_bytes(slice: &'a [u8]) -> Self { 75 | IoVec { 76 | sys: unsafe { sys::IoVec::from_bytes(slice) }, 77 | _p: PhantomData, 78 | } 79 | } 80 | 81 | /// Convert a slice of mutable iovecs to immutable iovecs 82 | pub fn from_mut_slice<'b>(slice: &'b [IoVecMut<'a>]) -> &'b [Self] { 83 | unsafe { ::core::mem::transmute(slice) } 84 | } 85 | 86 | /// Immutable borrow of the iovec. 87 | pub fn borrow(&self) -> IoVec { 88 | IoVec { 89 | sys: self.sys.clone(), 90 | _p: PhantomData, 91 | } 92 | } 93 | } 94 | 95 | impl<'a> ops::Deref for IoVec<'a> { 96 | type Target = [u8]; 97 | 98 | fn deref(&self) -> &[u8] { 99 | self.sys.as_ref() 100 | } 101 | } 102 | 103 | impl<'a> From<&'a [u8]> for IoVec<'a> { 104 | fn from(bytes: &'a [u8]) -> Self { 105 | IoVec::from_bytes(bytes) 106 | } 107 | } 108 | 109 | impl<'a> Default for IoVec<'a> { 110 | fn default() -> Self { 111 | IoVec { 112 | sys: sys::IoVec::default(), 113 | _p: PhantomData, 114 | } 115 | } 116 | } 117 | 118 | // ===== impl IoVecMut ===== 119 | 120 | impl<'a> IoVecMut<'a> { 121 | /// Convert an `IoVecMut` from a mutable byte slice. 122 | pub fn from_bytes(slice: &'a mut [u8]) -> Self { 123 | IoVecMut { 124 | sys: unsafe { sys::IoVec::from_bytes_mut(slice) }, 125 | _p: PhantomData, 126 | } 127 | } 128 | 129 | /// Immutable borrow of the iovec. 130 | pub fn borrow(&self) -> IoVec { 131 | IoVec { 132 | sys: self.sys.clone(), 133 | _p: PhantomData, 134 | } 135 | } 136 | 137 | /// Mutable borrow of the iovec. 138 | pub fn borrow_mut(&mut self) -> IoVecMut { 139 | IoVecMut { 140 | sys: self.sys.clone(), 141 | _p: PhantomData, 142 | } 143 | } 144 | } 145 | 146 | impl<'a> ops::Deref for IoVecMut<'a> { 147 | type Target = [u8]; 148 | 149 | fn deref(&self) -> &[u8] { 150 | &self.sys.as_ref() 151 | } 152 | } 153 | 154 | impl<'a> ops::DerefMut for IoVecMut<'a> { 155 | fn deref_mut(&mut self) -> &mut [u8] { 156 | self.sys.as_mut() 157 | } 158 | } 159 | 160 | impl<'a> From<&'a mut [u8]> for IoVecMut<'a> { 161 | fn from(bytes: &'a mut [u8]) -> Self { 162 | IoVecMut::from_bytes(bytes) 163 | } 164 | } 165 | 166 | impl<'a> Default for IoVecMut<'a> { 167 | fn default() -> Self { 168 | IoVecMut { 169 | sys: sys::IoVec::default(), 170 | _p: PhantomData, 171 | } 172 | } 173 | } 174 | 175 | #[cfg(test)] 176 | mod test { 177 | extern crate std; 178 | 179 | use self::std::vec::Vec; 180 | use super::{IoVec, IoVecMut}; 181 | 182 | #[test] 183 | fn convert_ref() { 184 | let buf: IoVec = (&b"hello world"[..]).into(); 185 | assert_eq!(buf[..], b"hello world"[..]); 186 | } 187 | 188 | #[test] 189 | fn convert_mut() { 190 | let mut buf: Vec = b"hello world".to_vec(); 191 | let buf: IoVecMut = (&mut buf[..]).into(); 192 | assert_eq!(buf[..], b"hello world"[..]); 193 | } 194 | 195 | #[test] 196 | fn default() { 197 | let buf: IoVec = IoVec::default(); 198 | assert_eq!(buf[..], b""[..]); 199 | } 200 | } 201 | -------------------------------------------------------------------------------- /src/sys/mod.rs: -------------------------------------------------------------------------------- 1 | #[cfg(unix)] 2 | mod unix; 3 | 4 | #[cfg(unix)] 5 | pub use self::unix::{ 6 | IoVec, 7 | MAX_LENGTH, 8 | }; 9 | 10 | #[cfg(windows)] 11 | mod windows; 12 | 13 | #[cfg(windows)] 14 | pub use self::windows::{ 15 | IoVec, 16 | MAX_LENGTH, 17 | }; 18 | 19 | #[cfg(not(any(windows, unix)))] 20 | mod unknown; 21 | 22 | #[cfg(not(any(windows, unix)))] 23 | pub use self::unknown::{ 24 | IoVec, 25 | MAX_LENGTH, 26 | }; 27 | -------------------------------------------------------------------------------- /src/sys/unix.rs: -------------------------------------------------------------------------------- 1 | use libc; 2 | use core::{slice, usize}; 3 | 4 | #[derive(Clone)] 5 | pub struct IoVec { 6 | inner: libc::iovec, 7 | } 8 | 9 | pub const MAX_LENGTH: usize = usize::MAX; 10 | 11 | impl IoVec { 12 | pub unsafe fn from_bytes(src: &[u8]) -> Self { 13 | IoVec { 14 | inner: libc::iovec { 15 | iov_base: src.as_ptr() as *mut _, 16 | iov_len: src.len(), 17 | }, 18 | } 19 | } 20 | 21 | pub unsafe fn from_bytes_mut(src: &mut [u8]) -> Self { 22 | IoVec { 23 | inner: libc::iovec { 24 | iov_base: src.as_ptr() as *mut _, 25 | iov_len: src.len(), 26 | }, 27 | } 28 | } 29 | 30 | pub fn as_ref(&self) -> &[u8] { 31 | unsafe { 32 | slice::from_raw_parts( 33 | self.inner.iov_base as *const u8, 34 | self.inner.iov_len) 35 | } 36 | } 37 | 38 | pub fn as_mut(&mut self) -> &mut [u8] { 39 | unsafe { 40 | slice::from_raw_parts_mut( 41 | self.inner.iov_base as *mut u8, 42 | self.inner.iov_len) 43 | } 44 | } 45 | } 46 | 47 | impl Default for IoVec { 48 | fn default() -> Self { 49 | unsafe { Self::from_bytes(<&[u8]>::default()) } 50 | } 51 | } 52 | -------------------------------------------------------------------------------- /src/sys/unknown.rs: -------------------------------------------------------------------------------- 1 | use core::slice; 2 | use core::usize; 3 | 4 | #[derive(Clone)] 5 | pub struct IoVec { 6 | ptr: *const u8, 7 | len: usize, 8 | } 9 | 10 | pub const MAX_LENGTH: usize = usize::MAX; 11 | 12 | impl IoVec { 13 | pub unsafe fn from_bytes(src: &[u8]) -> Self { 14 | IoVec { 15 | ptr: src.as_ptr(), 16 | len: src.len(), 17 | } 18 | } 19 | 20 | pub unsafe fn from_bytes_mut(src: &mut [u8]) -> Self { 21 | IoVec { 22 | ptr: src.as_ptr(), 23 | len: src.len(), 24 | } 25 | } 26 | 27 | pub fn as_ref(&self) -> &[u8] { 28 | unsafe { slice::from_raw_parts(self.ptr, self.len) } 29 | } 30 | 31 | pub fn as_mut(&mut self) -> &mut [u8] { 32 | unsafe { slice::from_raw_parts_mut(self.ptr as *mut u8, self.len) } 33 | } 34 | } 35 | 36 | impl Default for IoVec { 37 | fn default() -> Self { 38 | unsafe { Self::from_bytes(<&[u8]>::default()) } 39 | } 40 | } 41 | -------------------------------------------------------------------------------- /src/sys/windows.rs: -------------------------------------------------------------------------------- 1 | use winapi::shared::minwindef::DWORD; 2 | use winapi::shared::ws2def::WSABUF; 3 | use core::{slice, u32}; 4 | 5 | #[derive(Clone)] 6 | pub struct IoVec { 7 | inner: WSABUF, 8 | } 9 | 10 | pub const MAX_LENGTH: usize = u32::MAX as usize; 11 | 12 | impl IoVec { 13 | pub unsafe fn from_bytes(src: &[u8]) -> Self { 14 | IoVec { 15 | inner: WSABUF { 16 | buf: src.as_ptr() as *mut _, 17 | len: src.len() as DWORD, 18 | } 19 | } 20 | } 21 | 22 | pub unsafe fn from_bytes_mut(src: &mut [u8]) -> Self { 23 | IoVec { 24 | inner: WSABUF { 25 | buf: src.as_ptr() as *mut _, 26 | len: src.len() as DWORD, 27 | } 28 | } 29 | } 30 | 31 | pub fn as_ref(&self) -> &[u8] { 32 | unsafe { 33 | slice::from_raw_parts( 34 | self.inner.buf as *const u8, 35 | self.inner.len as usize) 36 | } 37 | } 38 | 39 | pub fn as_mut(&mut self) -> &mut [u8] { 40 | unsafe { 41 | slice::from_raw_parts_mut( 42 | self.inner.buf as *mut u8, 43 | self.inner.len as usize) 44 | } 45 | } 46 | } 47 | 48 | impl Default for IoVec { 49 | fn default() -> Self { 50 | unsafe { Self::from_bytes(<&[u8]>::default()) } 51 | } 52 | } 53 | -------------------------------------------------------------------------------- /src/unix.rs: -------------------------------------------------------------------------------- 1 | //! IoVec extensions for Unix platforms. 2 | //! 3 | //! These functions provide conversions to unix specific representations of the 4 | //! vectored data. 5 | //! 6 | //! # Examples 7 | //! 8 | //! ``` 9 | //! use iovec::IoVec; 10 | //! use iovec::unix; 11 | //! 12 | //! let a = b"hello".to_vec(); 13 | //! let b = b"world".to_vec(); 14 | //! 15 | //! let bufs: &[IoVec] = &[(&a[..]).into(), (&b[..]).into()]; 16 | //! let os_bufs = unix::as_os_slice(&bufs[..]); 17 | //! 18 | //! // Use the `os_bufs` slice with `writev`. 19 | //! ``` 20 | 21 | use {IoVec, IoVecMut}; 22 | use libc; 23 | 24 | use core::mem; 25 | 26 | /// Convert a slice of `IoVec` refs to a slice of `libc::iovec`. 27 | /// 28 | /// The return value can be passed to `writev` bindings. 29 | /// 30 | /// # Examples 31 | /// 32 | /// ``` 33 | /// use iovec::IoVec; 34 | /// use iovec::unix; 35 | /// 36 | /// let a = b"hello".to_vec(); 37 | /// let b = b"world".to_vec(); 38 | /// 39 | /// let bufs: &[IoVec] = &[a[..].into(), b[..].into()]; 40 | /// let os_bufs = unix::as_os_slice(bufs); 41 | /// 42 | /// // Use the `os_bufs` slice with `writev`. 43 | /// ``` 44 | pub fn as_os_slice<'a>(iov: &'a [IoVec]) -> &'a [libc::iovec] { 45 | unsafe { mem::transmute(iov) } 46 | } 47 | 48 | /// Convert a mutable slice of `IoVec` refs to a mutable slice of `libc::iovec`. 49 | /// 50 | /// The return value can be passed to `readv` bindings. 51 | /// 52 | /// # Examples 53 | /// 54 | /// ``` 55 | /// use iovec::IoVecMut; 56 | /// use iovec::unix; 57 | /// 58 | /// let mut a = [0; 10]; 59 | /// let mut b = [0; 10]; 60 | /// 61 | /// let bufs: &mut [IoVecMut] = &mut [(&mut a[..]).into(), (&mut b[..]).into()]; 62 | /// let os_bufs = unix::as_os_slice_mut(bufs); 63 | /// 64 | /// // Use the `os_bufs` slice with `readv`. 65 | /// ``` 66 | pub fn as_os_slice_mut<'a>(iov: &'a mut [IoVecMut]) -> &'a mut [libc::iovec] { 67 | unsafe { mem::transmute(iov) } 68 | } 69 | -------------------------------------------------------------------------------- /src/windows.rs: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/carllerche/iovec/b54dfbe145d41385ac8826819b3603ed27cd7612/src/windows.rs --------------------------------------------------------------------------------