diff --git a/LICENSE b/LICENSE deleted file mode 100644 index 6bfb22a193bccf256f59f7394d3c608139ed1091..0000000000000000000000000000000000000000 --- a/LICENSE +++ /dev/null @@ -1,52 +0,0 @@ -Copyright (c) 2015 Carl Lerche - -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies -of the Software, and to permit persons to whom the Software is furnished to do -so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + +END OF TERMS AND CONDITIONS + +APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + +Copyright 2017 Carl Lerche + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. diff --git a/LICENSE-MIT b/LICENSE-MIT new file mode 100644 index 0000000000000000000000000000000000000000..6c296bec80dfb6f0be6892cf443ec35f868707ab --- /dev/null +++ b/LICENSE-MIT @@ -0,0 +1,25 @@ +Copyright (c) 2017 Carl Lerche + +Permission is hereby granted, free of charge, to any +person obtaining a copy of this software and associated +documentation files (the "Software"), to deal in the +Software without restriction, including without +limitation the rights to use, copy, modify, merge, +publish, distribute, sublicense, and/or sell copies of +the Software, and to permit persons to whom the Software +is furnished to do so, subject to the following +conditions: + +The above copyright notice and this permission notice +shall be included in all copies or substantial portions +of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF +ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED +TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A +PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. diff --git a/README.md b/README.md index 3c86f387d6993609ce8e6409ce4842d6d070e199..c5333a1b1ed70bcbf24712ba1c140465f9e70e2f 100644 --- a/README.md +++ b/README.md @@ -2,16 +2,32 @@ A utility library for working with bytes. -[](https://crates.io/crates/bytes) +[](https://crates.io/crates/bytes) [](https://travis-ci.org/carllerche/bytes) -- [API documentation](http://carllerche.github.io/bytes/bytes/index.html) +[Documentation](https://docs.rs/bytes) ## Usage To use `bytes`, first add this to your `Cargo.toml`: ```toml -[dependencies.bytes] -git = "https://github.com/carllerche/bytes" +[dependencies] +bytes = "0.4" ``` + +Next, add this to your crate: + +```rust +extern crate bytes; + +use bytes::{Bytes, BytesMut, Buf, BufMut}; +``` + +# License + +`bytes` is primarily distributed under the terms of both the MIT license and the +Apache License (Version 2.0), with portions covered by various BSD-like +licenses. + +See LICENSE-APACHE, and LICENSE-MIT for details. diff --git a/src/bytes.rs b/src/bytes.rs index a5418273ebe1c9bc188ea05f0adf8f223a27fe0f..4fd958b045b8abf90e3e56470c580c3ce9d400ca 100644 --- a/src/bytes.rs +++ b/src/bytes.rs @@ -884,6 +884,36 @@ impl BytesMut { } } + /// Remove the bytes from the current view, returning them in a new + /// `BytesMut` handle. + /// + /// Afterwards, `self` will be empty, but will retain any additional + /// capacity that it had before the operation. This is identical to + /// `self.drain_to(self.len())`. + /// + /// This is an `O(1)` operation that just increases the reference count and + /// sets a few indexes. + /// + /// # Examples + /// + /// ``` + /// use bytes::{BytesMut, BufMut}; + /// + /// let mut buf = BytesMut::with_capacity(1024); + /// buf.put(&b"hello world"[..]); + /// + /// let other = buf.drain(); + /// + /// assert!(buf.is_empty()); + /// assert_eq!(1013, buf.capacity()); + /// + /// assert_eq!(other, b"hello world"[..]); + /// ``` + pub fn drain(&mut self) -> BytesMut { + let len = self.len(); + self.drain_to(len) + } + /// Splits the buffer into two at the given index. /// /// Afterwards `self` contains elements `[at, len)`, and the returned `BytesMut` diff --git a/src/lib.rs b/src/lib.rs index 16376373c07a3f08669577f3781aef65b51a7b1d..1fbc21f358081e28dc68dd759b481757ae0a463c 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -2,7 +2,10 @@ //! //! The `bytes` crate provides an efficient byte buffer structure //! ([`Bytes`](struct.Bytes.html)) and traits for working with buffer -//! implementations ([`Buf`](trait.Buf.html), [`BufMut`](trait.BufMut.html)). +//! implementations ([`Buf`], [`BufMut`]). +//! +//! [`Buf`]: trait.Buf.html +//! [`BufMut`]: trait.BufMut.html //! //! # `Bytes` //! @@ -15,18 +18,47 @@ //! using a reference count to track when the memory is no longer needed and can //! be freed. //! -//! See the [struct docs](struct.Bytes.html) for more details. +//! A `Bytes` handle can be created directly from an existing byte store (such as &[u8] +//! or Vec<u8>), but usually a `BytesMut` is used first and written to. For +//! example: +//! +//! ```rust +//! use bytes::{BytesMut, BufMut, BigEndian}; +//! +//! let mut buf = BytesMut::with_capacity(1024); +//! buf.put(&b"hello world"[..]); +//! buf.put_u16::<BigEndian>(1234); +//! +//! let a = buf.drain(); +//! assert_eq!(a, b"hello world\x04\xD2"[..]); +//! +//! buf.put(&b"goodbye world"[..]); +//! +//! let b = buf.drain(); +//! assert_eq!(b, b"goodbye world"[..]); +//! +//! assert_eq!(buf.capacity(), 998); +//! ``` +//! +//! In the above example, only a single buffer of 1024 is allocated. The handles +//! `a` and `b` will share the underlying buffer and maintain indices tracking +//! the view into the buffer represented by the handle. +//! +//! See the [struct docs] for more details. +//! +//! [struct docs]: struct.Bytes.html //! //! # `Buf`, `BufMut` //! //! These two traits provide read and write access to buffers. The underlying //! storage may or may not be in contiguous memory. For example, `Bytes` is a -//! buffer that guarantees contiguous memory, but a -//! [rope](https://en.wikipedia.org/wiki/Rope_(data_structure)) stores the bytes -//! in disjoint chunks. `Buf` and `BufMut` maintain cursors tracking the current +//! buffer that guarantees contiguous memory, but a [rope] stores the bytes in +//! disjoint chunks. `Buf` and `BufMut` maintain cursors tracking the current //! position in the underlying byte storage. When bytes are read or written, the //! cursor is advanced. //! +//! [rope]: https://en.wikipedia.org/wiki/Rope_(data_structure) +//! //! ## Relation with `Read` and `Write` //! //! At first glance, it may seem that `Buf` and `BufMut` overlap in @@ -35,33 +67,6 @@ //! argument to `Read::read` and `Write::write`. `Read` and `Write` may then //! perform a syscall, which has the potential of failing. Operations on `Buf` //! and `BufMut` are infallible. -//! -//! # Example -//! -//! ``` -//! use bytes::{BytesMut, Buf, BufMut}; -//! use std::io::Cursor; -//! use std::thread; -//! -//! // Allocate a buffer capable of holding 1024 bytes. -//! let mut buf = BytesMut::with_capacity(1024); -//! -//! // Write some data -//! buf.put("Hello world"); -//! buf.put(b'-'); -//! buf.put("goodbye"); -//! -//! // Freeze the buffer, enabling concurrent access -//! let b1 = buf.freeze(); -//! let b2 = b1.clone(); -//! -//! thread::spawn(move || { -//! assert_eq!(&b1[..], b"Hello world-goodbye"); -//! }); -//! -//! let mut buf = Cursor::new(b2); -//! assert_eq!(b'H', buf.get_u8()); -//! ``` #![deny(warnings, missing_docs)]