diff options
Diffstat (limited to 'third_party/rust/byteorder')
| -rw-r--r-- | third_party/rust/byteorder/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | third_party/rust/byteorder/CHANGELOG.md | 139 | ||||
| -rw-r--r-- | third_party/rust/byteorder/COPYING | 3 | ||||
| -rw-r--r-- | third_party/rust/byteorder/Cargo.toml | 43 | ||||
| -rw-r--r-- | third_party/rust/byteorder/LICENSE-MIT | 21 | ||||
| -rw-r--r-- | third_party/rust/byteorder/README.md | 63 | ||||
| -rw-r--r-- | third_party/rust/byteorder/UNLICENSE | 24 | ||||
| -rw-r--r-- | third_party/rust/byteorder/benches/bench.rs | 324 | ||||
| -rw-r--r-- | third_party/rust/byteorder/rustfmt.toml | 2 | ||||
| -rw-r--r-- | third_party/rust/byteorder/src/io.rs | 1592 | ||||
| -rw-r--r-- | third_party/rust/byteorder/src/lib.rs | 4052 |
11 files changed, 6264 insertions, 0 deletions
diff --git a/third_party/rust/byteorder/.cargo-checksum.json b/third_party/rust/byteorder/.cargo-checksum.json new file mode 100644 index 0000000000..434cc1a16f --- /dev/null +++ b/third_party/rust/byteorder/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"CHANGELOG.md":"3a745d94ee9dce0d9dc638c02078cd5001d3d9d12d58b4f220c0101e32cfc16a","COPYING":"01c266bced4a434da0051174d6bee16a4c82cf634e2679b6155d40d75012390f","Cargo.toml":"8585455e5a0e638cf5d489a21e286e93680f835cb8a13595918b5eb7c8c7f212","LICENSE-MIT":"0f96a83840e146e43c0ec96a22ec1f392e0680e6c1226e6f3ba87e0740af850f","README.md":"9d57556868344534de2489317e3c6bb611348ecd44438dcb982bd8d2a55a5a1b","UNLICENSE":"7e12e5df4bae12cb21581ba157ced20e1986a0508dd10d0e8a4ab9a4cf94e85c","benches/bench.rs":"a80bf3cd446c9b6c0cca3865c4de047bdf4644b74cdf696822f8ff87adfa1fca","rustfmt.toml":"1ca600239a27401c4a43f363cf3f38183a212affc1f31bff3ae93234bbaec228","src/io.rs":"9612530634d0e7ce9887a23836b58c0d972c1f45b05d9ada8355961567075627","src/lib.rs":"813ce6a8beafee3fd4e63325d783108aa02e8c57e412bc97580191d84082fbc9"},"package":"14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"}
\ No newline at end of file diff --git a/third_party/rust/byteorder/CHANGELOG.md b/third_party/rust/byteorder/CHANGELOG.md new file mode 100644 index 0000000000..6b51eb0760 --- /dev/null +++ b/third_party/rust/byteorder/CHANGELOG.md @@ -0,0 +1,139 @@ +1.3.4 +===== +This patch release squashes deprecation warnings for the `try!` macro, in +accordance with byteorder's minimum supported Rust version (currently at Rust +1.12.0). + + +1.3.3 +===== +This patch release adds `ByteOrder::write_i8_into()` as a simple, safe interface +for ordinarily unsafe or tedious code. + + +1.3.2 +===== +This patch release adds `ReadBytesExt::read_i8_into()` as a simple, safe interface +for ordinarily unsafe or tedious code. + + +1.3.1 +===== +This minor release performs mostly small internal changes. Going forward, these +are not going to be incorporated into the changelog. + + +1.3.0 +===== +This new minor release now enables `i128` support automatically on Rust +compilers that support 128-bit integers. The `i128` feature is now a no-op, but +continues to exist for backward compatibility purposes. The crate continues to +maintain compatibility with Rust 1.12.0. + +This release also deprecates the `ByteOrder` trait methods +`read_f32_into_unchecked` and `read_f64_into_unchecked` in favor of +`read_f32_into` and `read_f64_into`. This was an oversight from the 1.2 release +where the corresponding methods on `ReadBytesExt` were deprecated. + +`quickcheck` and `rand` were bumped to `0.8` and `0.6`, respectively. + +A few small documentation related bugs have been fixed. + + +1.2.7 +===== +This patch release excludes some CI files from the crate release and updates +the license field to use `OR` instead of `/`. + + +1.2.6 +===== +This patch release fixes some test compilation errors introduced by an +over-eager release of 1.2.5. + + +1.2.5 +===== +This patch release fixes some typos in the docs, adds doc tests to methods on +`WriteByteExt` and bumps the quickcheck dependency to `0.7`. + + +1.2.4 +===== +This patch release adds support for 48-bit integers by adding the following +methods to the `ByteOrder` trait: `read_u48`, `read_i48`, `write_u48` and +`write_i48`. Corresponding methods have been added to the `ReadBytesExt` and +`WriteBytesExt` traits as well. + + +1.2.3 +===== +This patch release removes the use of `feature(i128_type)` from byteorder, +since it has been stabilized. We leave byteorder's `i128` feature in place +in order to continue supporting compilation on older versions of Rust. + + +1.2.2 +===== +This patch release only consists of internal improvements and refactorings. +Notably, this removes all uses of `transmute` and instead uses pointer casts. + + +1.2.1 +===== +This patch release removes more unnecessary uses of `unsafe` that +were overlooked in the prior `1.2.0` release. In particular, the +`ReadBytesExt::read_{f32,f64}_into_checked` methods have been deprecated and +replaced by more appropriately named `read_{f32,f64}_into` methods. + + +1.2.0 +===== +The most prominent change in this release of `byteorder` is the removal of +unnecessary signaling NaN masking, and in turn, the `unsafe` annotations +associated with methods that didn't do masking. See +[#103](https://github.com/BurntSushi/byteorder/issues/103) +for more details. + +* [BUG #102](https://github.com/BurntSushi/byteorder/issues/102): + Fix big endian tests. +* [BUG #103](https://github.com/BurntSushi/byteorder/issues/103): + Remove sNaN masking. + + +1.1.0 +===== +This release of `byteorder` features a number of fixes and improvements, mostly +as a result of the +[Litz Blitz evaluation](https://public.etherpad-mozilla.org/p/rust-crate-eval-byteorder). + +Feature enhancements: + +* [FEATURE #63](https://github.com/BurntSushi/byteorder/issues/63): + Add methods for reading/writing slices of numbers for a specific + endianness. +* [FEATURE #65](https://github.com/BurntSushi/byteorder/issues/65): + Add support for `u128`/`i128` types. (Behind the nightly only `i128` + feature.) +* [FEATURE #72](https://github.com/BurntSushi/byteorder/issues/72): + Add "panics" and "errors" sections for each relevant public API item. +* [FEATURE #74](https://github.com/BurntSushi/byteorder/issues/74): + Add CI badges to Cargo.toml. +* [FEATURE #75](https://github.com/BurntSushi/byteorder/issues/75): + Add more examples to public API items. +* Add 24-bit read/write methods. +* Add `BE` and `LE` type aliases for `BigEndian` and `LittleEndian`, + respectively. + +Bug fixes: + +* [BUG #68](https://github.com/BurntSushi/byteorder/issues/68): + Panic in {BigEndian,LittleEndian}::default. +* [BUG #69](https://github.com/BurntSushi/byteorder/issues/69): + Seal the `ByteOrder` trait to prevent out-of-crate implementations. +* [BUG #71](https://github.com/BurntSushi/byteorder/issues/71): + Guarantee that the results of `read_f32`/`read_f64` are always defined. +* [BUG #73](https://github.com/BurntSushi/byteorder/issues/73): + Add crates.io categories. +* [BUG #77](https://github.com/BurntSushi/byteorder/issues/77): + Add `html_root` doc attribute. diff --git a/third_party/rust/byteorder/COPYING b/third_party/rust/byteorder/COPYING new file mode 100644 index 0000000000..bb9c20a094 --- /dev/null +++ b/third_party/rust/byteorder/COPYING @@ -0,0 +1,3 @@ +This project is dual-licensed under the Unlicense and MIT licenses. + +You may use this code under the terms of either license. diff --git a/third_party/rust/byteorder/Cargo.toml b/third_party/rust/byteorder/Cargo.toml new file mode 100644 index 0000000000..c71f90ba9c --- /dev/null +++ b/third_party/rust/byteorder/Cargo.toml @@ -0,0 +1,43 @@ +# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO +# +# When uploading crates to the registry Cargo will automatically +# "normalize" Cargo.toml files for maximal compatibility +# with all versions of Cargo and also rewrite `path` dependencies +# to registry (e.g., crates.io) dependencies +# +# If you believe there's an error in this file please file an +# issue against the rust-lang/cargo repository. If you're +# editing this file be aware that the upstream Cargo.toml +# will likely look very different (and much more reasonable) + +[package] +edition = "2018" +name = "byteorder" +version = "1.4.3" +authors = ["Andrew Gallant <jamslam@gmail.com>"] +exclude = ["/ci/*"] +description = "Library for reading/writing numbers in big-endian and little-endian." +homepage = "https://github.com/BurntSushi/byteorder" +documentation = "https://docs.rs/byteorder" +readme = "README.md" +keywords = ["byte", "endian", "big-endian", "little-endian", "binary"] +categories = ["encoding", "parsing", "no-std"] +license = "Unlicense OR MIT" +repository = "https://github.com/BurntSushi/byteorder" +[profile.bench] +opt-level = 3 + +[lib] +name = "byteorder" +bench = false +[dev-dependencies.quickcheck] +version = "0.9.2" +default-features = false + +[dev-dependencies.rand] +version = "0.7" + +[features] +default = ["std"] +i128 = [] +std = [] diff --git a/third_party/rust/byteorder/LICENSE-MIT b/third_party/rust/byteorder/LICENSE-MIT new file mode 100644 index 0000000000..3b0a5dc09c --- /dev/null +++ b/third_party/rust/byteorder/LICENSE-MIT @@ -0,0 +1,21 @@ +The MIT License (MIT) + +Copyright (c) 2015 Andrew Gallant + +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/third_party/rust/byteorder/README.md b/third_party/rust/byteorder/README.md new file mode 100644 index 0000000000..d8461c58f7 --- /dev/null +++ b/third_party/rust/byteorder/README.md @@ -0,0 +1,63 @@ +byteorder +========= +This crate provides convenience methods for encoding and decoding +numbers in either big-endian or little-endian order. + +[](https://github.com/BurntSushi/byteorder/actions) +[](https://crates.io/crates/byteorder) + +Dual-licensed under MIT or the [UNLICENSE](https://unlicense.org/). + + +### Documentation + +https://docs.rs/byteorder + + +### Installation + +This crate works with Cargo and is on +[crates.io](https://crates.io/crates/byteorder). Add it to your `Cargo.toml` +like so: + +```toml +[dependencies] +byteorder = "1" +``` + +If you want to augment existing `Read` and `Write` traits, then import the +extension methods like so: + +```rust +use byteorder::{ReadBytesExt, WriteBytesExt, BigEndian, LittleEndian}; +``` + +For example: + +```rust +use std::io::Cursor; +use byteorder::{BigEndian, ReadBytesExt}; + +let mut rdr = Cursor::new(vec![2, 5, 3, 0]); +// Note that we use type parameters to indicate which kind of byte order +// we want! +assert_eq!(517, rdr.read_u16::<BigEndian>().unwrap()); +assert_eq!(768, rdr.read_u16::<BigEndian>().unwrap()); +``` + +### `no_std` crates + +This crate has a feature, `std`, that is enabled by default. To use this crate +in a `no_std` context, add the following to your `Cargo.toml`: + +```toml +[dependencies] +byteorder = { version = "1", default-features = false } +``` + + +### Alternatives + +Note that as of Rust 1.32, the standard numeric types provide built-in methods +like `to_le_bytes` and `from_le_bytes`, which support some of the same use +cases. diff --git a/third_party/rust/byteorder/UNLICENSE b/third_party/rust/byteorder/UNLICENSE new file mode 100644 index 0000000000..68a49daad8 --- /dev/null +++ b/third_party/rust/byteorder/UNLICENSE @@ -0,0 +1,24 @@ +This is free and unencumbered software released into the public domain. + +Anyone is free to copy, modify, publish, use, compile, sell, or +distribute this software, either in source code form or as a compiled +binary, for any purpose, commercial or non-commercial, and by any +means. + +In jurisdictions that recognize copyright laws, the author or authors +of this software dedicate any and all copyright interest in the +software to the public domain. We make this dedication for the benefit +of the public at large and to the detriment of our heirs and +successors. We intend this dedication to be an overt act of +relinquishment in perpetuity of all present and future rights to this +software under copyright law. + +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 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. + +For more information, please refer to <http://unlicense.org/> diff --git a/third_party/rust/byteorder/benches/bench.rs b/third_party/rust/byteorder/benches/bench.rs new file mode 100644 index 0000000000..bb00422f79 --- /dev/null +++ b/third_party/rust/byteorder/benches/bench.rs @@ -0,0 +1,324 @@ +#![feature(test)] + +extern crate test; + +macro_rules! bench_num { + ($name:ident, $read:ident, $bytes:expr, $data:expr) => { + mod $name { + use byteorder::{ + BigEndian, ByteOrder, LittleEndian, NativeEndian, + }; + use test::black_box as bb; + use test::Bencher; + + const NITER: usize = 100_000; + + #[bench] + fn read_big_endian(b: &mut Bencher) { + let buf = $data; + b.iter(|| { + for _ in 0..NITER { + bb(BigEndian::$read(&buf, $bytes)); + } + }); + } + + #[bench] + fn read_little_endian(b: &mut Bencher) { + let buf = $data; + b.iter(|| { + for _ in 0..NITER { + bb(LittleEndian::$read(&buf, $bytes)); + } + }); + } + + #[bench] + fn read_native_endian(b: &mut Bencher) { + let buf = $data; + b.iter(|| { + for _ in 0..NITER { + bb(NativeEndian::$read(&buf, $bytes)); + } + }); + } + } + }; + ($ty:ident, $max:ident, + $read:ident, $write:ident, $size:expr, $data:expr) => { + mod $ty { + use byteorder::{ + BigEndian, ByteOrder, LittleEndian, NativeEndian, + }; + use std::$ty; + use test::black_box as bb; + use test::Bencher; + + const NITER: usize = 100_000; + + #[bench] + fn read_big_endian(b: &mut Bencher) { + let buf = $data; + b.iter(|| { + for _ in 0..NITER { + bb(BigEndian::$read(&buf)); + } + }); + } + + #[bench] + fn read_little_endian(b: &mut Bencher) { + let buf = $data; + b.iter(|| { + for _ in 0..NITER { + bb(LittleEndian::$read(&buf)); + } + }); + } + + #[bench] + fn read_native_endian(b: &mut Bencher) { + let buf = $data; + b.iter(|| { + for _ in 0..NITER { + bb(NativeEndian::$read(&buf)); + } + }); + } + + #[bench] + fn write_big_endian(b: &mut Bencher) { + let mut buf = $data; + let n = $ty::$max; + b.iter(|| { + for _ in 0..NITER { + bb(BigEndian::$write(&mut buf, n)); + } + }); + } + + #[bench] + fn write_little_endian(b: &mut Bencher) { + let mut buf = $data; + let n = $ty::$max; + b.iter(|| { + for _ in 0..NITER { + bb(LittleEndian::$write(&mut buf, n)); + } + }); + } + + #[bench] + fn write_native_endian(b: &mut Bencher) { + let mut buf = $data; + let n = $ty::$max; + b.iter(|| { + for _ in 0..NITER { + bb(NativeEndian::$write(&mut buf, n)); + } + }); + } + } + }; +} + +bench_num!(u16, MAX, read_u16, write_u16, 2, [1, 2]); +bench_num!(i16, MAX, read_i16, write_i16, 2, [1, 2]); +bench_num!(u32, MAX, read_u32, write_u32, 4, [1, 2, 3, 4]); +bench_num!(i32, MAX, read_i32, write_i32, 4, [1, 2, 3, 4]); +bench_num!(u64, MAX, read_u64, write_u64, 8, [1, 2, 3, 4, 5, 6, 7, 8]); +bench_num!(i64, MAX, read_i64, write_i64, 8, [1, 2, 3, 4, 5, 6, 7, 8]); +bench_num!(f32, MAX, read_f32, write_f32, 4, [1, 2, 3, 4]); +bench_num!(f64, MAX, read_f64, write_f64, 8, [1, 2, 3, 4, 5, 6, 7, 8]); + +bench_num!(uint_1, read_uint, 1, [1]); +bench_num!(uint_2, read_uint, 2, [1, 2]); +bench_num!(uint_3, read_uint, 3, [1, 2, 3]); +bench_num!(uint_4, read_uint, 4, [1, 2, 3, 4]); +bench_num!(uint_5, read_uint, 5, [1, 2, 3, 4, 5]); +bench_num!(uint_6, read_uint, 6, [1, 2, 3, 4, 5, 6]); +bench_num!(uint_7, read_uint, 7, [1, 2, 3, 4, 5, 6, 7]); +bench_num!(uint_8, read_uint, 8, [1, 2, 3, 4, 5, 6, 7, 8]); + +bench_num!(int_1, read_int, 1, [1]); +bench_num!(int_2, read_int, 2, [1, 2]); +bench_num!(int_3, read_int, 3, [1, 2, 3]); +bench_num!(int_4, read_int, 4, [1, 2, 3, 4]); +bench_num!(int_5, read_int, 5, [1, 2, 3, 4, 5]); +bench_num!(int_6, read_int, 6, [1, 2, 3, 4, 5, 6]); +bench_num!(int_7, read_int, 7, [1, 2, 3, 4, 5, 6, 7]); +bench_num!(int_8, read_int, 8, [1, 2, 3, 4, 5, 6, 7, 8]); + +bench_num!( + u128, + MAX, + read_u128, + write_u128, + 16, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16] +); +bench_num!( + i128, + MAX, + read_i128, + write_i128, + 16, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16] +); + +bench_num!(uint128_1, read_uint128, 1, [1]); +bench_num!(uint128_2, read_uint128, 2, [1, 2]); +bench_num!(uint128_3, read_uint128, 3, [1, 2, 3]); +bench_num!(uint128_4, read_uint128, 4, [1, 2, 3, 4]); +bench_num!(uint128_5, read_uint128, 5, [1, 2, 3, 4, 5]); +bench_num!(uint128_6, read_uint128, 6, [1, 2, 3, 4, 5, 6]); +bench_num!(uint128_7, read_uint128, 7, [1, 2, 3, 4, 5, 6, 7]); +bench_num!(uint128_8, read_uint128, 8, [1, 2, 3, 4, 5, 6, 7, 8]); +bench_num!(uint128_9, read_uint128, 9, [1, 2, 3, 4, 5, 6, 7, 8, 9]); +bench_num!(uint128_10, read_uint128, 10, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]); +bench_num!(uint128_11, read_uint128, 11, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]); +bench_num!( + uint128_12, + read_uint128, + 12, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12] +); +bench_num!( + uint128_13, + read_uint128, + 13, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13] +); +bench_num!( + uint128_14, + read_uint128, + 14, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14] +); +bench_num!( + uint128_15, + read_uint128, + 15, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15] +); +bench_num!( + uint128_16, + read_uint128, + 16, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16] +); + +bench_num!(int128_1, read_int128, 1, [1]); +bench_num!(int128_2, read_int128, 2, [1, 2]); +bench_num!(int128_3, read_int128, 3, [1, 2, 3]); +bench_num!(int128_4, read_int128, 4, [1, 2, 3, 4]); +bench_num!(int128_5, read_int128, 5, [1, 2, 3, 4, 5]); +bench_num!(int128_6, read_int128, 6, [1, 2, 3, 4, 5, 6]); +bench_num!(int128_7, read_int128, 7, [1, 2, 3, 4, 5, 6, 7]); +bench_num!(int128_8, read_int128, 8, [1, 2, 3, 4, 5, 6, 7, 8]); +bench_num!(int128_9, read_int128, 9, [1, 2, 3, 4, 5, 6, 7, 8, 9]); +bench_num!(int128_10, read_int128, 10, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]); +bench_num!(int128_11, read_int128, 11, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]); +bench_num!( + int128_12, + read_int128, + 12, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12] +); +bench_num!( + int128_13, + read_int128, + 13, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13] +); +bench_num!( + int128_14, + read_int128, + 14, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14] +); +bench_num!( + int128_15, + read_int128, + 15, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15] +); +bench_num!( + int128_16, + read_int128, + 16, + [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16] +); + +macro_rules! bench_slice { + ($name:ident, $numty:ty, $read:ident, $write:ident) => { + mod $name { + use std::mem::size_of; + + use byteorder::{BigEndian, ByteOrder, LittleEndian}; + use rand::distributions; + use rand::{self, Rng}; + use test::Bencher; + + #[bench] + fn read_big_endian(b: &mut Bencher) { + let mut numbers: Vec<$numty> = rand::thread_rng() + .sample_iter(&distributions::Standard) + .take(100000) + .collect(); + let mut bytes = vec![0; numbers.len() * size_of::<$numty>()]; + BigEndian::$write(&numbers, &mut bytes); + + b.bytes = bytes.len() as u64; + b.iter(|| { + BigEndian::$read(&bytes, &mut numbers); + }); + } + + #[bench] + fn read_little_endian(b: &mut Bencher) { + let mut numbers: Vec<$numty> = rand::thread_rng() + .sample_iter(&distributions::Standard) + .take(100000) + .collect(); + let mut bytes = vec![0; numbers.len() * size_of::<$numty>()]; + LittleEndian::$write(&numbers, &mut bytes); + + b.bytes = bytes.len() as u64; + b.iter(|| { + LittleEndian::$read(&bytes, &mut numbers); + }); + } + + #[bench] + fn write_big_endian(b: &mut Bencher) { + let numbers: Vec<$numty> = rand::thread_rng() + .sample_iter(&distributions::Standard) + .take(100000) + .collect(); + let mut bytes = vec![0; numbers.len() * size_of::<$numty>()]; + + b.bytes = bytes.len() as u64; + b.iter(|| { + BigEndian::$write(&numbers, &mut bytes); + }); + } + + #[bench] + fn write_little_endian(b: &mut Bencher) { + let numbers: Vec<$numty> = rand::thread_rng() + .sample_iter(&distributions::Standard) + .take(100000) + .collect(); + let mut bytes = vec![0; numbers.len() * size_of::<$numty>()]; + + b.bytes = bytes.len() as u64; + b.iter(|| { + LittleEndian::$write(&numbers, &mut bytes); + }); + } + } + }; +} + +bench_slice!(slice_u64, u64, read_u64_into, write_u64_into); diff --git a/third_party/rust/byteorder/rustfmt.toml b/third_party/rust/byteorder/rustfmt.toml new file mode 100644 index 0000000000..aa37a218b9 --- /dev/null +++ b/third_party/rust/byteorder/rustfmt.toml @@ -0,0 +1,2 @@ +max_width = 79 +use_small_heuristics = "max" diff --git a/third_party/rust/byteorder/src/io.rs b/third_party/rust/byteorder/src/io.rs new file mode 100644 index 0000000000..dfad2ca39e --- /dev/null +++ b/third_party/rust/byteorder/src/io.rs @@ -0,0 +1,1592 @@ +use std::{ + io::{self, Result}, + slice, +}; + +use crate::ByteOrder; + +/// Extends [`Read`] with methods for reading numbers. (For `std::io`.) +/// +/// Most of the methods defined here have an unconstrained type parameter that +/// must be explicitly instantiated. Typically, it is instantiated with either +/// the [`BigEndian`] or [`LittleEndian`] types defined in this crate. +/// +/// # Examples +/// +/// Read unsigned 16 bit big-endian integers from a [`Read`]: +/// +/// ```rust +/// use std::io::Cursor; +/// use byteorder::{BigEndian, ReadBytesExt}; +/// +/// let mut rdr = Cursor::new(vec![2, 5, 3, 0]); +/// assert_eq!(517, rdr.read_u16::<BigEndian>().unwrap()); +/// assert_eq!(768, rdr.read_u16::<BigEndian>().unwrap()); +/// ``` +/// +/// [`BigEndian`]: enum.BigEndian.html +/// [`LittleEndian`]: enum.LittleEndian.html +/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html +pub trait ReadBytesExt: io::Read { + /// Reads an unsigned 8 bit integer from the underlying reader. + /// + /// Note that since this reads a single byte, no byte order conversions + /// are used. It is included for completeness. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read unsigned 8 bit integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::ReadBytesExt; + /// + /// let mut rdr = Cursor::new(vec![2, 5]); + /// assert_eq!(2, rdr.read_u8().unwrap()); + /// assert_eq!(5, rdr.read_u8().unwrap()); + /// ``` + #[inline] + fn read_u8(&mut self) -> Result<u8> { + let mut buf = [0; 1]; + self.read_exact(&mut buf)?; + Ok(buf[0]) + } + + /// Reads a signed 8 bit integer from the underlying reader. + /// + /// Note that since this reads a single byte, no byte order conversions + /// are used. It is included for completeness. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read signed 8 bit integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::ReadBytesExt; + /// + /// let mut rdr = Cursor::new(vec![0x02, 0xfb]); + /// assert_eq!(2, rdr.read_i8().unwrap()); + /// assert_eq!(-5, rdr.read_i8().unwrap()); + /// ``` + #[inline] + fn read_i8(&mut self) -> Result<i8> { + let mut buf = [0; 1]; + self.read_exact(&mut buf)?; + Ok(buf[0] as i8) + } + + /// Reads an unsigned 16 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read unsigned 16 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![2, 5, 3, 0]); + /// assert_eq!(517, rdr.read_u16::<BigEndian>().unwrap()); + /// assert_eq!(768, rdr.read_u16::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_u16<T: ByteOrder>(&mut self) -> Result<u16> { + let mut buf = [0; 2]; + self.read_exact(&mut buf)?; + Ok(T::read_u16(&buf)) + } + + /// Reads a signed 16 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read signed 16 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0x00, 0xc1, 0xff, 0x7c]); + /// assert_eq!(193, rdr.read_i16::<BigEndian>().unwrap()); + /// assert_eq!(-132, rdr.read_i16::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_i16<T: ByteOrder>(&mut self) -> Result<i16> { + let mut buf = [0; 2]; + self.read_exact(&mut buf)?; + Ok(T::read_i16(&buf)) + } + + /// Reads an unsigned 24 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read unsigned 24 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0x00, 0x01, 0x0b]); + /// assert_eq!(267, rdr.read_u24::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_u24<T: ByteOrder>(&mut self) -> Result<u32> { + let mut buf = [0; 3]; + self.read_exact(&mut buf)?; + Ok(T::read_u24(&buf)) + } + + /// Reads a signed 24 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read signed 24 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0xff, 0x7a, 0x33]); + /// assert_eq!(-34253, rdr.read_i24::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_i24<T: ByteOrder>(&mut self) -> Result<i32> { + let mut buf = [0; 3]; + self.read_exact(&mut buf)?; + Ok(T::read_i24(&buf)) + } + + /// Reads an unsigned 32 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read unsigned 32 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0x00, 0x00, 0x01, 0x0b]); + /// assert_eq!(267, rdr.read_u32::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_u32<T: ByteOrder>(&mut self) -> Result<u32> { + let mut buf = [0; 4]; + self.read_exact(&mut buf)?; + Ok(T::read_u32(&buf)) + } + + /// Reads a signed 32 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read signed 32 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0xff, 0xff, 0x7a, 0x33]); + /// assert_eq!(-34253, rdr.read_i32::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_i32<T: ByteOrder>(&mut self) -> Result<i32> { + let mut buf = [0; 4]; + self.read_exact(&mut buf)?; + Ok(T::read_i32(&buf)) + } + + /// Reads an unsigned 48 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read unsigned 48 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0xb6, 0x71, 0x6b, 0xdc, 0x2b, 0x31]); + /// assert_eq!(200598257150769, rdr.read_u48::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_u48<T: ByteOrder>(&mut self) -> Result<u64> { + let mut buf = [0; 6]; + self.read_exact(&mut buf)?; + Ok(T::read_u48(&buf)) + } + + /// Reads a signed 48 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read signed 48 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0x9d, 0x71, 0xab, 0xe7, 0x97, 0x8f]); + /// assert_eq!(-108363435763825, rdr.read_i48::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_i48<T: ByteOrder>(&mut self) -> Result<i64> { + let mut buf = [0; 6]; + self.read_exact(&mut buf)?; + Ok(T::read_i48(&buf)) + } + + /// Reads an unsigned 64 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read an unsigned 64 bit big-endian integer from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0x00, 0x03, 0x43, 0x95, 0x4d, 0x60, 0x86, 0x83]); + /// assert_eq!(918733457491587, rdr.read_u64::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_u64<T: ByteOrder>(&mut self) -> Result<u64> { + let mut buf = [0; 8]; + self.read_exact(&mut buf)?; + Ok(T::read_u64(&buf)) + } + + /// Reads a signed 64 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a signed 64 bit big-endian integer from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0x80, 0, 0, 0, 0, 0, 0, 0]); + /// assert_eq!(i64::min_value(), rdr.read_i64::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_i64<T: ByteOrder>(&mut self) -> Result<i64> { + let mut buf = [0; 8]; + self.read_exact(&mut buf)?; + Ok(T::read_i64(&buf)) + } + + /// Reads an unsigned 128 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read an unsigned 128 bit big-endian integer from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![ + /// 0x00, 0x03, 0x43, 0x95, 0x4d, 0x60, 0x86, 0x83, + /// 0x00, 0x03, 0x43, 0x95, 0x4d, 0x60, 0x86, 0x83 + /// ]); + /// assert_eq!(16947640962301618749969007319746179, rdr.read_u128::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_u128<T: ByteOrder>(&mut self) -> Result<u128> { + let mut buf = [0; 16]; + self.read_exact(&mut buf)?; + Ok(T::read_u128(&buf)) + } + + /// Reads a signed 128 bit integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a signed 128 bit big-endian integer from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]); + /// assert_eq!(i128::min_value(), rdr.read_i128::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_i128<T: ByteOrder>(&mut self) -> Result<i128> { + let mut buf = [0; 16]; + self.read_exact(&mut buf)?; + Ok(T::read_i128(&buf)) + } + + /// Reads an unsigned n-bytes integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read an unsigned n-byte big-endian integer from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0x80, 0x74, 0xfa]); + /// assert_eq!(8418554, rdr.read_uint::<BigEndian>(3).unwrap()); + #[inline] + fn read_uint<T: ByteOrder>(&mut self, nbytes: usize) -> Result<u64> { + let mut buf = [0; 8]; + self.read_exact(&mut buf[..nbytes])?; + Ok(T::read_uint(&buf[..nbytes], nbytes)) + } + + /// Reads a signed n-bytes integer from the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read an unsigned n-byte big-endian integer from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0xc1, 0xff, 0x7c]); + /// assert_eq!(-4063364, rdr.read_int::<BigEndian>(3).unwrap()); + #[inline] + fn read_int<T: ByteOrder>(&mut self, nbytes: usize) -> Result<i64> { + let mut buf = [0; 8]; + self.read_exact(&mut buf[..nbytes])?; + Ok(T::read_int(&buf[..nbytes], nbytes)) + } + + /// Reads an unsigned n-bytes integer from the underlying reader. + #[inline] + fn read_uint128<T: ByteOrder>(&mut self, nbytes: usize) -> Result<u128> { + let mut buf = [0; 16]; + self.read_exact(&mut buf[..nbytes])?; + Ok(T::read_uint128(&buf[..nbytes], nbytes)) + } + + /// Reads a signed n-bytes integer from the underlying reader. + #[inline] + fn read_int128<T: ByteOrder>(&mut self, nbytes: usize) -> Result<i128> { + let mut buf = [0; 16]; + self.read_exact(&mut buf[..nbytes])?; + Ok(T::read_int128(&buf[..nbytes], nbytes)) + } + + /// Reads a IEEE754 single-precision (4 bytes) floating point number from + /// the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a big-endian single-precision floating point number from a `Read`: + /// + /// ```rust + /// use std::f32; + /// use std::io::Cursor; + /// + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![ + /// 0x40, 0x49, 0x0f, 0xdb, + /// ]); + /// assert_eq!(f32::consts::PI, rdr.read_f32::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_f32<T: ByteOrder>(&mut self) -> Result<f32> { + let mut buf = [0; 4]; + self.read_exact(&mut buf)?; + Ok(T::read_f32(&buf)) + } + + /// Reads a IEEE754 double-precision (8 bytes) floating point number from + /// the underlying reader. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a big-endian double-precision floating point number from a `Read`: + /// + /// ```rust + /// use std::f64; + /// use std::io::Cursor; + /// + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![ + /// 0x40, 0x09, 0x21, 0xfb, 0x54, 0x44, 0x2d, 0x18, + /// ]); + /// assert_eq!(f64::consts::PI, rdr.read_f64::<BigEndian>().unwrap()); + /// ``` + #[inline] + fn read_f64<T: ByteOrder>(&mut self) -> Result<f64> { + let mut buf = [0; 8]; + self.read_exact(&mut buf)?; + Ok(T::read_f64(&buf)) + } + + /// Reads a sequence of unsigned 16 bit integers from the underlying + /// reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of unsigned 16 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![2, 5, 3, 0]); + /// let mut dst = [0; 2]; + /// rdr.read_u16_into::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([517, 768], dst); + /// ``` + #[inline] + fn read_u16_into<T: ByteOrder>(&mut self, dst: &mut [u16]) -> Result<()> { + { + let buf = unsafe { slice_to_u8_mut(dst) }; + self.read_exact(buf)?; + } + T::from_slice_u16(dst); + Ok(()) + } + + /// Reads a sequence of unsigned 32 bit integers from the underlying + /// reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of unsigned 32 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0, 0, 2, 5, 0, 0, 3, 0]); + /// let mut dst = [0; 2]; + /// rdr.read_u32_into::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([517, 768], dst); + /// ``` + #[inline] + fn read_u32_into<T: ByteOrder>(&mut self, dst: &mut [u32]) -> Result<()> { + { + let buf = unsafe { slice_to_u8_mut(dst) }; + self.read_exact(buf)?; + } + T::from_slice_u32(dst); + Ok(()) + } + + /// Reads a sequence of unsigned 64 bit integers from the underlying + /// reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of unsigned 64 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![ + /// 0, 0, 0, 0, 0, 0, 2, 5, + /// 0, 0, 0, 0, 0, 0, 3, 0, + /// ]); + /// let mut dst = [0; 2]; + /// rdr.read_u64_into::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([517, 768], dst); + /// ``` + #[inline] + fn read_u64_into<T: ByteOrder>(&mut self, dst: &mut [u64]) -> Result<()> { + { + let buf = unsafe { slice_to_u8_mut(dst) }; + self.read_exact(buf)?; + } + T::from_slice_u64(dst); + Ok(()) + } + + /// Reads a sequence of unsigned 128 bit integers from the underlying + /// reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of unsigned 128 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![ + /// 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 5, + /// 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, + /// ]); + /// let mut dst = [0; 2]; + /// rdr.read_u128_into::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([517, 768], dst); + /// ``` + #[inline] + fn read_u128_into<T: ByteOrder>( + &mut self, + dst: &mut [u128], + ) -> Result<()> { + { + let buf = unsafe { slice_to_u8_mut(dst) }; + self.read_exact(buf)?; + } + T::from_slice_u128(dst); + Ok(()) + } + + /// Reads a sequence of signed 8 bit integers from the underlying reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// Note that since each `i8` is a single byte, no byte order conversions + /// are used. This method is included because it provides a safe, simple + /// way for the caller to read into a `&mut [i8]` buffer. (Without this + /// method, the caller would have to either use `unsafe` code or convert + /// each byte to `i8` individually.) + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of signed 8 bit integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![2, 251, 3]); + /// let mut dst = [0; 3]; + /// rdr.read_i8_into(&mut dst).unwrap(); + /// assert_eq!([2, -5, 3], dst); + /// ``` + #[inline] + fn read_i8_into(&mut self, dst: &mut [i8]) -> Result<()> { + let buf = unsafe { slice_to_u8_mut(dst) }; + self.read_exact(buf) + } + + /// Reads a sequence of signed 16 bit integers from the underlying + /// reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of signed 16 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![2, 5, 3, 0]); + /// let mut dst = [0; 2]; + /// rdr.read_i16_into::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([517, 768], dst); + /// ``` + #[inline] + fn read_i16_into<T: ByteOrder>(&mut self, dst: &mut [i16]) -> Result<()> { + { + let buf = unsafe { slice_to_u8_mut(dst) }; + self.read_exact(buf)?; + } + T::from_slice_i16(dst); + Ok(()) + } + + /// Reads a sequence of signed 32 bit integers from the underlying + /// reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of signed 32 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![0, 0, 2, 5, 0, 0, 3, 0]); + /// let mut dst = [0; 2]; + /// rdr.read_i32_into::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([517, 768], dst); + /// ``` + #[inline] + fn read_i32_into<T: ByteOrder>(&mut self, dst: &mut [i32]) -> Result<()> { + { + let buf = unsafe { slice_to_u8_mut(dst) }; + self.read_exact(buf)?; + } + T::from_slice_i32(dst); + Ok(()) + } + + /// Reads a sequence of signed 64 bit integers from the underlying + /// reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of signed 64 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![ + /// 0, 0, 0, 0, 0, 0, 2, 5, + /// 0, 0, 0, 0, 0, 0, 3, 0, + /// ]); + /// let mut dst = [0; 2]; + /// rdr.read_i64_into::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([517, 768], dst); + /// ``` + #[inline] + fn read_i64_into<T: ByteOrder>(&mut self, dst: &mut [i64]) -> Result<()> { + { + let buf = unsafe { slice_to_u8_mut(dst) }; + self.read_exact(buf)?; + } + T::from_slice_i64(dst); + Ok(()) + } + + /// Reads a sequence of signed 128 bit integers from the underlying + /// reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of signed 128 bit big-endian integers from a `Read`: + /// + /// ```rust + /// use std::io::Cursor; + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![ + /// 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 5, + /// 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, + /// ]); + /// let mut dst = [0; 2]; + /// rdr.read_i128_into::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([517, 768], dst); + /// ``` + #[inline] + fn read_i128_into<T: ByteOrder>( + &mut self, + dst: &mut [i128], + ) -> Result<()> { + { + let buf = unsafe { slice_to_u8_mut(dst) }; + self.read_exact(buf)?; + } + T::from_slice_i128(dst); + Ok(()) + } + + /// Reads a sequence of IEEE754 single-precision (4 bytes) floating + /// point numbers from the underlying reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of big-endian single-precision floating point number + /// from a `Read`: + /// + /// ```rust + /// use std::f32; + /// use std::io::Cursor; + /// + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![ + /// 0x40, 0x49, 0x0f, 0xdb, + /// 0x3f, 0x80, 0x00, 0x00, + /// ]); + /// let mut dst = [0.0; 2]; + /// rdr.read_f32_into::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([f32::consts::PI, 1.0], dst); + /// ``` + #[inline] + fn read_f32_into<T: ByteOrder>(&mut self, dst: &mut [f32]) -> Result<()> { + { + let buf = unsafe { slice_to_u8_mut(dst) }; + self.read_exact(buf)?; + } + T::from_slice_f32(dst); + Ok(()) + } + + /// **DEPRECATED**. + /// + /// This method is deprecated. Use `read_f32_into` instead. + /// + /// Reads a sequence of IEEE754 single-precision (4 bytes) floating + /// point numbers from the underlying reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of big-endian single-precision floating point number + /// from a `Read`: + /// + /// ```rust + /// use std::f32; + /// use std::io::Cursor; + /// + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![ + /// 0x40, 0x49, 0x0f, 0xdb, + /// 0x3f, 0x80, 0x00, 0x00, + /// ]); + /// let mut dst = [0.0; 2]; + /// rdr.read_f32_into_unchecked::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([f32::consts::PI, 1.0], dst); + /// ``` + #[inline] + #[deprecated(since = "1.2.0", note = "please use `read_f32_into` instead")] + fn read_f32_into_unchecked<T: ByteOrder>( + &mut self, + dst: &mut [f32], + ) -> Result<()> { + self.read_f32_into::<T>(dst) + } + + /// Reads a sequence of IEEE754 double-precision (8 bytes) floating + /// point numbers from the underlying reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of big-endian single-precision floating point number + /// from a `Read`: + /// + /// ```rust + /// use std::f64; + /// use std::io::Cursor; + /// + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![ + /// 0x40, 0x09, 0x21, 0xfb, 0x54, 0x44, 0x2d, 0x18, + /// 0x3f, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /// ]); + /// let mut dst = [0.0; 2]; + /// rdr.read_f64_into::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([f64::consts::PI, 1.0], dst); + /// ``` + #[inline] + fn read_f64_into<T: ByteOrder>(&mut self, dst: &mut [f64]) -> Result<()> { + { + let buf = unsafe { slice_to_u8_mut(dst) }; + self.read_exact(buf)?; + } + T::from_slice_f64(dst); + Ok(()) + } + + /// **DEPRECATED**. + /// + /// This method is deprecated. Use `read_f64_into` instead. + /// + /// Reads a sequence of IEEE754 double-precision (8 bytes) floating + /// point numbers from the underlying reader. + /// + /// The given buffer is either filled completely or an error is returned. + /// If an error is returned, the contents of `dst` are unspecified. + /// + /// # Safety + /// + /// This method is unsafe because there are no guarantees made about the + /// floating point values. In particular, this method does not check for + /// signaling NaNs, which may result in undefined behavior. + /// + /// # Errors + /// + /// This method returns the same errors as [`Read::read_exact`]. + /// + /// [`Read::read_exact`]: https://doc.rust-lang.org/std/io/trait.Read.html#method.read_exact + /// + /// # Examples + /// + /// Read a sequence of big-endian single-precision floating point number + /// from a `Read`: + /// + /// ```rust + /// use std::f64; + /// use std::io::Cursor; + /// + /// use byteorder::{BigEndian, ReadBytesExt}; + /// + /// let mut rdr = Cursor::new(vec![ + /// 0x40, 0x09, 0x21, 0xfb, 0x54, 0x44, 0x2d, 0x18, + /// 0x3f, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /// ]); + /// let mut dst = [0.0; 2]; + /// rdr.read_f64_into_unchecked::<BigEndian>(&mut dst).unwrap(); + /// assert_eq!([f64::consts::PI, 1.0], dst); + /// ``` + #[inline] + #[deprecated(since = "1.2.0", note = "please use `read_f64_into` instead")] + fn read_f64_into_unchecked<T: ByteOrder>( + &mut self, + dst: &mut [f64], + ) -> Result<()> { + self.read_f64_into::<T>(dst) + } +} + +/// All types that implement `Read` get methods defined in `ReadBytesExt` +/// for free. +impl<R: io::Read + ?Sized> ReadBytesExt for R {} + +/// Extends [`Write`] with methods for writing numbers. (For `std::io`.) +/// +/// Most of the methods defined here have an unconstrained type parameter that +/// must be explicitly instantiated. Typically, it is instantiated with either +/// the [`BigEndian`] or [`LittleEndian`] types defined in this crate. +/// +/// # Examples +/// +/// Write unsigned 16 bit big-endian integers to a [`Write`]: +/// +/// ```rust +/// use byteorder::{BigEndian, WriteBytesExt}; +/// +/// let mut wtr = vec![]; +/// wtr.write_u16::<BigEndian>(517).unwrap(); +/// wtr.write_u16::<BigEndian>(768).unwrap(); +/// assert_eq!(wtr, vec![2, 5, 3, 0]); +/// ``` +/// +/// [`BigEndian`]: enum.BigEndian.html +/// [`LittleEndian`]: enum.LittleEndian.html +/// [`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html +pub trait WriteBytesExt: io::Write { + /// Writes an unsigned 8 bit integer to the underlying writer. + /// + /// Note that since this writes a single byte, no byte order conversions + /// are used. It is included for completeness. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write unsigned 8 bit integers to a `Write`: + /// + /// ```rust + /// use byteorder::WriteBytesExt; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_u8(2).unwrap(); + /// wtr.write_u8(5).unwrap(); + /// assert_eq!(wtr, b"\x02\x05"); + /// ``` + #[inline] + fn write_u8(&mut self, n: u8) -> Result<()> { + self.write_all(&[n]) + } + + /// Writes a signed 8 bit integer to the underlying writer. + /// + /// Note that since this writes a single byte, no byte order conversions + /// are used. It is included for completeness. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write signed 8 bit integers to a `Write`: + /// + /// ```rust + /// use byteorder::WriteBytesExt; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_i8(2).unwrap(); + /// wtr.write_i8(-5).unwrap(); + /// assert_eq!(wtr, b"\x02\xfb"); + /// ``` + #[inline] + fn write_i8(&mut self, n: i8) -> Result<()> { + self.write_all(&[n as u8]) + } + + /// Writes an unsigned 16 bit integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write unsigned 16 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_u16::<BigEndian>(517).unwrap(); + /// wtr.write_u16::<BigEndian>(768).unwrap(); + /// assert_eq!(wtr, b"\x02\x05\x03\x00"); + /// ``` + #[inline] + fn write_u16<T: ByteOrder>(&mut self, n: u16) -> Result<()> { + let mut buf = [0; 2]; + T::write_u16(&mut buf, n); + self.write_all(&buf) + } + + /// Writes a signed 16 bit integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write signed 16 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_i16::<BigEndian>(193).unwrap(); + /// wtr.write_i16::<BigEndian>(-132).unwrap(); + /// assert_eq!(wtr, b"\x00\xc1\xff\x7c"); + /// ``` + #[inline] + fn write_i16<T: ByteOrder>(&mut self, n: i16) -> Result<()> { + let mut buf = [0; 2]; + T::write_i16(&mut buf, n); + self.write_all(&buf) + } + + /// Writes an unsigned 24 bit integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write unsigned 24 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_u24::<BigEndian>(267).unwrap(); + /// wtr.write_u24::<BigEndian>(120111).unwrap(); + /// assert_eq!(wtr, b"\x00\x01\x0b\x01\xd5\x2f"); + /// ``` + #[inline] + fn write_u24<T: ByteOrder>(&mut self, n: u32) -> Result<()> { + let mut buf = [0; 3]; + T::write_u24(&mut buf, n); + self.write_all(&buf) + } + + /// Writes a signed 24 bit integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write signed 24 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_i24::<BigEndian>(-34253).unwrap(); + /// wtr.write_i24::<BigEndian>(120111).unwrap(); + /// assert_eq!(wtr, b"\xff\x7a\x33\x01\xd5\x2f"); + /// ``` + #[inline] + fn write_i24<T: ByteOrder>(&mut self, n: i32) -> Result<()> { + let mut buf = [0; 3]; + T::write_i24(&mut buf, n); + self.write_all(&buf) + } + + /// Writes an unsigned 32 bit integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write unsigned 32 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_u32::<BigEndian>(267).unwrap(); + /// wtr.write_u32::<BigEndian>(1205419366).unwrap(); + /// assert_eq!(wtr, b"\x00\x00\x01\x0b\x47\xd9\x3d\x66"); + /// ``` + #[inline] + fn write_u32<T: ByteOrder>(&mut self, n: u32) -> Result<()> { + let mut buf = [0; 4]; + T::write_u32(&mut buf, n); + self.write_all(&buf) + } + + /// Writes a signed 32 bit integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write signed 32 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_i32::<BigEndian>(-34253).unwrap(); + /// wtr.write_i32::<BigEndian>(1205419366).unwrap(); + /// assert_eq!(wtr, b"\xff\xff\x7a\x33\x47\xd9\x3d\x66"); + /// ``` + #[inline] + fn write_i32<T: ByteOrder>(&mut self, n: i32) -> Result<()> { + let mut buf = [0; 4]; + T::write_i32(&mut buf, n); + self.write_all(&buf) + } + + /// Writes an unsigned 48 bit integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write unsigned 48 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_u48::<BigEndian>(52360336390828).unwrap(); + /// wtr.write_u48::<BigEndian>(541).unwrap(); + /// assert_eq!(wtr, b"\x2f\x9f\x17\x40\x3a\xac\x00\x00\x00\x00\x02\x1d"); + /// ``` + #[inline] + fn write_u48<T: ByteOrder>(&mut self, n: u64) -> Result<()> { + let mut buf = [0; 6]; + T::write_u48(&mut buf, n); + self.write_all(&buf) + } + + /// Writes a signed 48 bit integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write signed 48 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_i48::<BigEndian>(-108363435763825).unwrap(); + /// wtr.write_i48::<BigEndian>(77).unwrap(); + /// assert_eq!(wtr, b"\x9d\x71\xab\xe7\x97\x8f\x00\x00\x00\x00\x00\x4d"); + /// ``` + #[inline] + fn write_i48<T: ByteOrder>(&mut self, n: i64) -> Result<()> { + let mut buf = [0; 6]; + T::write_i48(&mut buf, n); + self.write_all(&buf) + } + + /// Writes an unsigned 64 bit integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write unsigned 64 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_u64::<BigEndian>(918733457491587).unwrap(); + /// wtr.write_u64::<BigEndian>(143).unwrap(); + /// assert_eq!(wtr, b"\x00\x03\x43\x95\x4d\x60\x86\x83\x00\x00\x00\x00\x00\x00\x00\x8f"); + /// ``` + #[inline] + fn write_u64<T: ByteOrder>(&mut self, n: u64) -> Result<()> { + let mut buf = [0; 8]; + T::write_u64(&mut buf, n); + self.write_all(&buf) + } + + /// Writes a signed 64 bit integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write signed 64 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_i64::<BigEndian>(i64::min_value()).unwrap(); + /// wtr.write_i64::<BigEndian>(i64::max_value()).unwrap(); + /// assert_eq!(wtr, b"\x80\x00\x00\x00\x00\x00\x00\x00\x7f\xff\xff\xff\xff\xff\xff\xff"); + /// ``` + #[inline] + fn write_i64<T: ByteOrder>(&mut self, n: i64) -> Result<()> { + let mut buf = [0; 8]; + T::write_i64(&mut buf, n); + self.write_all(&buf) + } + + /// Writes an unsigned 128 bit integer to the underlying writer. + #[inline] + fn write_u128<T: ByteOrder>(&mut self, n: u128) -> Result<()> { + let mut buf = [0; 16]; + T::write_u128(&mut buf, n); + self.write_all(&buf) + } + + /// Writes a signed 128 bit integer to the underlying writer. + #[inline] + fn write_i128<T: ByteOrder>(&mut self, n: i128) -> Result<()> { + let mut buf = [0; 16]; + T::write_i128(&mut buf, n); + self.write_all(&buf) + } + + /// Writes an unsigned n-bytes integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Panics + /// + /// If the given integer is not representable in the given number of bytes, + /// this method panics. If `nbytes > 8`, this method panics. + /// + /// # Examples + /// + /// Write unsigned 40 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_uint::<BigEndian>(312550384361, 5).unwrap(); + /// wtr.write_uint::<BigEndian>(43, 5).unwrap(); + /// assert_eq!(wtr, b"\x48\xc5\x74\x62\xe9\x00\x00\x00\x00\x2b"); + /// ``` + #[inline] + fn write_uint<T: ByteOrder>( + &mut self, + n: u64, + nbytes: usize, + ) -> Result<()> { + let mut buf = [0; 8]; + T::write_uint(&mut buf, n, nbytes); + self.write_all(&buf[0..nbytes]) + } + + /// Writes a signed n-bytes integer to the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Panics + /// + /// If the given integer is not representable in the given number of bytes, + /// this method panics. If `nbytes > 8`, this method panics. + /// + /// # Examples + /// + /// Write signed 56 bit big-endian integers to a `Write`: + /// + /// ```rust + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_int::<BigEndian>(-3548172039376767, 7).unwrap(); + /// wtr.write_int::<BigEndian>(43, 7).unwrap(); + /// assert_eq!(wtr, b"\xf3\x64\xf4\xd1\xfd\xb0\x81\x00\x00\x00\x00\x00\x00\x2b"); + /// ``` + #[inline] + fn write_int<T: ByteOrder>( + &mut self, + n: i64, + nbytes: usize, + ) -> Result<()> { + let mut buf = [0; 8]; + T::write_int(&mut buf, n, nbytes); + self.write_all(&buf[0..nbytes]) + } + + /// Writes an unsigned n-bytes integer to the underlying writer. + /// + /// If the given integer is not representable in the given number of bytes, + /// this method panics. If `nbytes > 16`, this method panics. + #[inline] + fn write_uint128<T: ByteOrder>( + &mut self, + n: u128, + nbytes: usize, + ) -> Result<()> { + let mut buf = [0; 16]; + T::write_uint128(&mut buf, n, nbytes); + self.write_all(&buf[0..nbytes]) + } + + /// Writes a signed n-bytes integer to the underlying writer. + /// + /// If the given integer is not representable in the given number of bytes, + /// this method panics. If `nbytes > 16`, this method panics. + #[inline] + fn write_int128<T: ByteOrder>( + &mut self, + n: i128, + nbytes: usize, + ) -> Result<()> { + let mut buf = [0; 16]; + T::write_int128(&mut buf, n, nbytes); + self.write_all(&buf[0..nbytes]) + } + + /// Writes a IEEE754 single-precision (4 bytes) floating point number to + /// the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write a big-endian single-precision floating point number to a `Write`: + /// + /// ```rust + /// use std::f32; + /// + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_f32::<BigEndian>(f32::consts::PI).unwrap(); + /// assert_eq!(wtr, b"\x40\x49\x0f\xdb"); + /// ``` + #[inline] + fn write_f32<T: ByteOrder>(&mut self, n: f32) -> Result<()> { + let mut buf = [0; 4]; + T::write_f32(&mut buf, n); + self.write_all(&buf) + } + + /// Writes a IEEE754 double-precision (8 bytes) floating point number to + /// the underlying writer. + /// + /// # Errors + /// + /// This method returns the same errors as [`Write::write_all`]. + /// + /// [`Write::write_all`]: https://doc.rust-lang.org/std/io/trait.Write.html#method.write_all + /// + /// # Examples + /// + /// Write a big-endian double-precision floating point number to a `Write`: + /// + /// ```rust + /// use std::f64; + /// + /// use byteorder::{BigEndian, WriteBytesExt}; + /// + /// let mut wtr = Vec::new(); + /// wtr.write_f64::<BigEndian>(f64::consts::PI).unwrap(); + /// assert_eq!(wtr, b"\x40\x09\x21\xfb\x54\x44\x2d\x18"); + /// ``` + #[inline] + fn write_f64<T: ByteOrder>(&mut self, n: f64) -> Result<()> { + let mut buf = [0; 8]; + T::write_f64(&mut buf, n); + self.write_all(&buf) + } +} + +/// All types that implement `Write` get methods defined in `WriteBytesExt` +/// for free. +impl<W: io::Write + ?Sized> WriteBytesExt for W {} + +/// Convert a slice of T (where T is plain old data) to its mutable binary +/// representation. +/// +/// This function is wildly unsafe because it permits arbitrary modification of +/// the binary representation of any `Copy` type. Use with care. It's intended +/// to be called only where `T` is a numeric type. +unsafe fn slice_to_u8_mut<T: Copy>(slice: &mut [T]) -> &mut [u8] { + use std::mem::size_of; + + let len = size_of::<T>() * slice.len(); + slice::from_raw_parts_mut(slice.as_mut_ptr() as *mut u8, len) +} diff --git a/third_party/rust/byteorder/src/lib.rs b/third_party/rust/byteorder/src/lib.rs new file mode 100644 index 0000000000..cc37cca6ae --- /dev/null +++ b/third_party/rust/byteorder/src/lib.rs @@ -0,0 +1,4052 @@ +/*! +This crate provides convenience methods for encoding and decoding numbers in +either [big-endian or little-endian order]. + +The organization of the crate is pretty simple. A trait, [`ByteOrder`], specifies +byte conversion methods for each type of number in Rust (sans numbers that have +a platform dependent size like `usize` and `isize`). Two types, [`BigEndian`] +and [`LittleEndian`] implement these methods. Finally, [`ReadBytesExt`] and +[`WriteBytesExt`] provide convenience methods available to all types that +implement [`Read`] and [`Write`]. + +An alias, [`NetworkEndian`], for [`BigEndian`] is provided to help improve +code clarity. + +An additional alias, [`NativeEndian`], is provided for the endianness of the +local platform. This is convenient when serializing data for use and +conversions are not desired. + +# Examples + +Read unsigned 16 bit big-endian integers from a [`Read`] type: + +```rust +use std::io::Cursor; +use byteorder::{BigEndian, ReadBytesExt}; + +let mut rdr = Cursor::new(vec![2, 5, 3, 0]); +// Note that we use type parameters to indicate which kind of byte order +// we want! +assert_eq!(517, rdr.read_u16::<BigEndian>().unwrap()); +assert_eq!(768, rdr.read_u16::<BigEndian>().unwrap()); +``` + +Write unsigned 16 bit little-endian integers to a [`Write`] type: + +```rust +use byteorder::{LittleEndian, WriteBytesExt}; + +let mut wtr = vec![]; +wtr.write_u16::<LittleEndian>(517).unwrap(); +wtr.write_u16::<LittleEndian>(768).unwrap(); +assert_eq!(wtr, vec![5, 2, 0, 3]); +``` + +# Optional Features + +This crate optionally provides support for 128 bit values (`i128` and `u128`) +when built with the `i128` feature enabled. + +This crate can also be used without the standard library. + +# Alternatives + +Note that as of Rust 1.32, the standard numeric types provide built-in methods +like `to_le_bytes` and `from_le_bytes`, which support some of the same use +cases. + +[big-endian or little-endian order]: https://en.wikipedia.org/wiki/Endianness +[`ByteOrder`]: trait.ByteOrder.html +[`BigEndian`]: enum.BigEndian.html +[`LittleEndian`]: enum.LittleEndian.html +[`ReadBytesExt`]: trait.ReadBytesExt.html +[`WriteBytesExt`]: trait.WriteBytesExt.html +[`NetworkEndian`]: type.NetworkEndian.html +[`NativeEndian`]: type.NativeEndian.html +[`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html +[`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html +*/ + +#![deny(missing_docs)] +#![cfg_attr(not(feature = "std"), no_std)] + +use core::{ + convert::TryInto, fmt::Debug, hash::Hash, ptr::copy_nonoverlapping, slice, +}; + +#[cfg(feature = "std")] +pub use crate::io::{ReadBytesExt, WriteBytesExt}; + +#[cfg(feature = "std")] +mod io; + +#[inline] +fn extend_sign(val: u64, nbytes: usize) -> i64 { + let shift = (8 - nbytes) * 8; + (val << shift) as i64 >> shift +} + +#[inline] +fn extend_sign128(val: u128, nbytes: usize) -> i128 { + let shift = (16 - nbytes) * 8; + (val << shift) as i128 >> shift +} + +#[inline] +fn unextend_sign(val: i64, nbytes: usize) -> u64 { + let shift = (8 - nbytes) * 8; + (val << shift) as u64 >> shift +} + +#[inline] +fn unextend_sign128(val: i128, nbytes: usize) -> u128 { + let shift = (16 - nbytes) * 8; + (val << shift) as u128 >> shift +} + +#[inline] +fn pack_size(n: u64) -> usize { + if n < 1 << 8 { + 1 + } else if n < 1 << 16 { + 2 + } else if n < 1 << 24 { + 3 + } else if n < 1 << 32 { + 4 + } else if n < 1 << 40 { + 5 + } else if n < 1 << 48 { + 6 + } else if n < 1 << 56 { + 7 + } else { + 8 + } +} + +#[inline] +fn pack_size128(n: u128) -> usize { + if n < 1 << 8 { + 1 + } else if n < 1 << 16 { + 2 + } else if n < 1 << 24 { + 3 + } else if n < 1 << 32 { + 4 + } else if n < 1 << 40 { + 5 + } else if n < 1 << 48 { + 6 + } else if n < 1 << 56 { + 7 + } else if n < 1 << 64 { + 8 + } else if n < 1 << 72 { + 9 + } else if n < 1 << 80 { + 10 + } else if n < 1 << 88 { + 11 + } else if n < 1 << 96 { + 12 + } else if n < 1 << 104 { + 13 + } else if n < 1 << 112 { + 14 + } else if n < 1 << 120 { + 15 + } else { + 16 + } +} + +mod private { + /// Sealed stops crates other than byteorder from implementing any traits + /// that use it. + pub trait Sealed {} + impl Sealed for super::LittleEndian {} + impl Sealed for super::BigEndian {} +} + +/// `ByteOrder` describes types that can serialize integers as bytes. +/// +/// Note that `Self` does not appear anywhere in this trait's definition! +/// Therefore, in order to use it, you'll need to use syntax like +/// `T::read_u16(&[0, 1])` where `T` implements `ByteOrder`. +/// +/// This crate provides two types that implement `ByteOrder`: [`BigEndian`] +/// and [`LittleEndian`]. +/// This trait is sealed and cannot be implemented for callers to avoid +/// breaking backwards compatibility when adding new derived traits. +/// +/// # Examples +/// +/// Write and read `u32` numbers in little endian order: +/// +/// ```rust +/// use byteorder::{ByteOrder, LittleEndian}; +/// +/// let mut buf = [0; 4]; +/// LittleEndian::write_u32(&mut buf, 1_000_000); +/// assert_eq!(1_000_000, LittleEndian::read_u32(&buf)); +/// ``` +/// +/// Write and read `i16` numbers in big endian order: +/// +/// ```rust +/// use byteorder::{ByteOrder, BigEndian}; +/// +/// let mut buf = [0; 2]; +/// BigEndian::write_i16(&mut buf, -5_000); +/// assert_eq!(-5_000, BigEndian::read_i16(&buf)); +/// ``` +/// +/// [`BigEndian`]: enum.BigEndian.html +/// [`LittleEndian`]: enum.LittleEndian.html +pub trait ByteOrder: + Clone + + Copy + + Debug + + Default + + Eq + + Hash + + Ord + + PartialEq + + PartialOrd + + private::Sealed +{ + /// Reads an unsigned 16 bit integer from `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 2`. + fn read_u16(buf: &[u8]) -> u16; + + /// Reads an unsigned 24 bit integer from `buf`, stored in u32. + /// + /// # Panics + /// + /// Panics when `buf.len() < 3`. + /// + /// # Examples + /// + /// Write and read 24 bit `u32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_u24(&mut buf, 1_000_000); + /// assert_eq!(1_000_000, LittleEndian::read_u24(&buf)); + /// ``` + fn read_u24(buf: &[u8]) -> u32 { + Self::read_uint(buf, 3) as u32 + } + + /// Reads an unsigned 32 bit integer from `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 4`. + /// + /// # Examples + /// + /// Write and read `u32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 4]; + /// LittleEndian::write_u32(&mut buf, 1_000_000); + /// assert_eq!(1_000_000, LittleEndian::read_u32(&buf)); + /// ``` + fn read_u32(buf: &[u8]) -> u32; + + /// Reads an unsigned 48 bit integer from `buf`, stored in u64. + /// + /// # Panics + /// + /// Panics when `buf.len() < 6`. + /// + /// # Examples + /// + /// Write and read 48 bit `u64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 6]; + /// LittleEndian::write_u48(&mut buf, 1_000_000_000_000); + /// assert_eq!(1_000_000_000_000, LittleEndian::read_u48(&buf)); + /// ``` + fn read_u48(buf: &[u8]) -> u64 { + Self::read_uint(buf, 6) as u64 + } + + /// Reads an unsigned 64 bit integer from `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 8`. + /// + /// # Examples + /// + /// Write and read `u64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 8]; + /// LittleEndian::write_u64(&mut buf, 1_000_000); + /// assert_eq!(1_000_000, LittleEndian::read_u64(&buf)); + /// ``` + fn read_u64(buf: &[u8]) -> u64; + + /// Reads an unsigned 128 bit integer from `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 16`. + /// + /// # Examples + /// + /// Write and read `u128` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 16]; + /// LittleEndian::write_u128(&mut buf, 1_000_000); + /// assert_eq!(1_000_000, LittleEndian::read_u128(&buf)); + /// ``` + fn read_u128(buf: &[u8]) -> u128; + + /// Reads an unsigned n-bytes integer from `buf`. + /// + /// # Panics + /// + /// Panics when `nbytes < 1` or `nbytes > 8` or + /// `buf.len() < nbytes` + /// + /// # Examples + /// + /// Write and read an n-byte number in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_uint(&mut buf, 1_000_000, 3); + /// assert_eq!(1_000_000, LittleEndian::read_uint(&buf, 3)); + /// ``` + fn read_uint(buf: &[u8], nbytes: usize) -> u64; + + /// Reads an unsigned n-bytes integer from `buf`. + /// + /// # Panics + /// + /// Panics when `nbytes < 1` or `nbytes > 16` or + /// `buf.len() < nbytes` + /// + /// # Examples + /// + /// Write and read an n-byte number in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_uint128(&mut buf, 1_000_000, 3); + /// assert_eq!(1_000_000, LittleEndian::read_uint128(&buf, 3)); + /// ``` + fn read_uint128(buf: &[u8], nbytes: usize) -> u128; + + /// Writes an unsigned 16 bit integer `n` to `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 2`. + /// + /// # Examples + /// + /// Write and read `u16` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 2]; + /// LittleEndian::write_u16(&mut buf, 1_000); + /// assert_eq!(1_000, LittleEndian::read_u16(&buf)); + /// ``` + fn write_u16(buf: &mut [u8], n: u16); + + /// Writes an unsigned 24 bit integer `n` to `buf`, stored in u32. + /// + /// # Panics + /// + /// Panics when `buf.len() < 3`. + /// + /// # Examples + /// + /// Write and read 24 bit `u32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_u24(&mut buf, 1_000_000); + /// assert_eq!(1_000_000, LittleEndian::read_u24(&buf)); + /// ``` + fn write_u24(buf: &mut [u8], n: u32) { + Self::write_uint(buf, n as u64, 3) + } + + /// Writes an unsigned 32 bit integer `n` to `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 4`. + /// + /// # Examples + /// + /// Write and read `u32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 4]; + /// LittleEndian::write_u32(&mut buf, 1_000_000); + /// assert_eq!(1_000_000, LittleEndian::read_u32(&buf)); + /// ``` + fn write_u32(buf: &mut [u8], n: u32); + + /// Writes an unsigned 48 bit integer `n` to `buf`, stored in u64. + /// + /// # Panics + /// + /// Panics when `buf.len() < 6`. + /// + /// # Examples + /// + /// Write and read 48 bit `u64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 6]; + /// LittleEndian::write_u48(&mut buf, 1_000_000_000_000); + /// assert_eq!(1_000_000_000_000, LittleEndian::read_u48(&buf)); + /// ``` + fn write_u48(buf: &mut [u8], n: u64) { + Self::write_uint(buf, n as u64, 6) + } + + /// Writes an unsigned 64 bit integer `n` to `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 8`. + /// + /// # Examples + /// + /// Write and read `u64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 8]; + /// LittleEndian::write_u64(&mut buf, 1_000_000); + /// assert_eq!(1_000_000, LittleEndian::read_u64(&buf)); + /// ``` + fn write_u64(buf: &mut [u8], n: u64); + + /// Writes an unsigned 128 bit integer `n` to `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 16`. + /// + /// # Examples + /// + /// Write and read `u128` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 16]; + /// LittleEndian::write_u128(&mut buf, 1_000_000); + /// assert_eq!(1_000_000, LittleEndian::read_u128(&buf)); + /// ``` + fn write_u128(buf: &mut [u8], n: u128); + + /// Writes an unsigned integer `n` to `buf` using only `nbytes`. + /// + /// # Panics + /// + /// If `n` is not representable in `nbytes`, or if `nbytes` is `> 8`, then + /// this method panics. + /// + /// # Examples + /// + /// Write and read an n-byte number in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_uint(&mut buf, 1_000_000, 3); + /// assert_eq!(1_000_000, LittleEndian::read_uint(&buf, 3)); + /// ``` + fn write_uint(buf: &mut [u8], n: u64, nbytes: usize); + + /// Writes an unsigned integer `n` to `buf` using only `nbytes`. + /// + /// # Panics + /// + /// If `n` is not representable in `nbytes`, or if `nbytes` is `> 16`, then + /// this method panics. + /// + /// # Examples + /// + /// Write and read an n-byte number in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_uint128(&mut buf, 1_000_000, 3); + /// assert_eq!(1_000_000, LittleEndian::read_uint128(&buf, 3)); + /// ``` + fn write_uint128(buf: &mut [u8], n: u128, nbytes: usize); + + /// Reads a signed 16 bit integer from `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 2`. + /// + /// # Examples + /// + /// Write and read `i16` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 2]; + /// LittleEndian::write_i16(&mut buf, -1_000); + /// assert_eq!(-1_000, LittleEndian::read_i16(&buf)); + /// ``` + #[inline] + fn read_i16(buf: &[u8]) -> i16 { + Self::read_u16(buf) as i16 + } + + /// Reads a signed 24 bit integer from `buf`, stored in i32. + /// + /// # Panics + /// + /// Panics when `buf.len() < 3`. + /// + /// # Examples + /// + /// Write and read 24 bit `i32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_i24(&mut buf, -1_000_000); + /// assert_eq!(-1_000_000, LittleEndian::read_i24(&buf)); + /// ``` + #[inline] + fn read_i24(buf: &[u8]) -> i32 { + Self::read_int(buf, 3) as i32 + } + + /// Reads a signed 32 bit integer from `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 4`. + /// + /// # Examples + /// + /// Write and read `i32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 4]; + /// LittleEndian::write_i32(&mut buf, -1_000_000); + /// assert_eq!(-1_000_000, LittleEndian::read_i32(&buf)); + /// ``` + #[inline] + fn read_i32(buf: &[u8]) -> i32 { + Self::read_u32(buf) as i32 + } + + /// Reads a signed 48 bit integer from `buf`, stored in i64. + /// + /// # Panics + /// + /// Panics when `buf.len() < 6`. + /// + /// # Examples + /// + /// Write and read 48 bit `i64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 6]; + /// LittleEndian::write_i48(&mut buf, -1_000_000_000_000); + /// assert_eq!(-1_000_000_000_000, LittleEndian::read_i48(&buf)); + /// ``` + #[inline] + fn read_i48(buf: &[u8]) -> i64 { + Self::read_int(buf, 6) as i64 + } + + /// Reads a signed 64 bit integer from `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 8`. + /// + /// # Examples + /// + /// Write and read `i64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 8]; + /// LittleEndian::write_i64(&mut buf, -1_000_000_000); + /// assert_eq!(-1_000_000_000, LittleEndian::read_i64(&buf)); + /// ``` + #[inline] + fn read_i64(buf: &[u8]) -> i64 { + Self::read_u64(buf) as i64 + } + + /// Reads a signed 128 bit integer from `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 16`. + /// + /// # Examples + /// + /// Write and read `i128` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 16]; + /// LittleEndian::write_i128(&mut buf, -1_000_000_000); + /// assert_eq!(-1_000_000_000, LittleEndian::read_i128(&buf)); + /// ``` + #[inline] + fn read_i128(buf: &[u8]) -> i128 { + Self::read_u128(buf) as i128 + } + + /// Reads a signed n-bytes integer from `buf`. + /// + /// # Panics + /// + /// Panics when `nbytes < 1` or `nbytes > 8` or + /// `buf.len() < nbytes` + /// + /// # Examples + /// + /// Write and read n-length signed numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_int(&mut buf, -1_000, 3); + /// assert_eq!(-1_000, LittleEndian::read_int(&buf, 3)); + /// ``` + #[inline] + fn read_int(buf: &[u8], nbytes: usize) -> i64 { + extend_sign(Self::read_uint(buf, nbytes), nbytes) + } + + /// Reads a signed n-bytes integer from `buf`. + /// + /// # Panics + /// + /// Panics when `nbytes < 1` or `nbytes > 16` or + /// `buf.len() < nbytes` + /// + /// # Examples + /// + /// Write and read n-length signed numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_int128(&mut buf, -1_000, 3); + /// assert_eq!(-1_000, LittleEndian::read_int128(&buf, 3)); + /// ``` + #[inline] + fn read_int128(buf: &[u8], nbytes: usize) -> i128 { + extend_sign128(Self::read_uint128(buf, nbytes), nbytes) + } + + /// Reads a IEEE754 single-precision (4 bytes) floating point number. + /// + /// # Panics + /// + /// Panics when `buf.len() < 4`. + /// + /// # Examples + /// + /// Write and read `f32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let e = 2.71828; + /// let mut buf = [0; 4]; + /// LittleEndian::write_f32(&mut buf, e); + /// assert_eq!(e, LittleEndian::read_f32(&buf)); + /// ``` + #[inline] + fn read_f32(buf: &[u8]) -> f32 { + f32::from_bits(Self::read_u32(buf)) + } + + /// Reads a IEEE754 double-precision (8 bytes) floating point number. + /// + /// # Panics + /// + /// Panics when `buf.len() < 8`. + /// + /// # Examples + /// + /// Write and read `f64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let phi = 1.6180339887; + /// let mut buf = [0; 8]; + /// LittleEndian::write_f64(&mut buf, phi); + /// assert_eq!(phi, LittleEndian::read_f64(&buf)); + /// ``` + #[inline] + fn read_f64(buf: &[u8]) -> f64 { + f64::from_bits(Self::read_u64(buf)) + } + + /// Writes a signed 16 bit integer `n` to `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 2`. + /// + /// # Examples + /// + /// Write and read `i16` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 2]; + /// LittleEndian::write_i16(&mut buf, -1_000); + /// assert_eq!(-1_000, LittleEndian::read_i16(&buf)); + /// ``` + #[inline] + fn write_i16(buf: &mut [u8], n: i16) { + Self::write_u16(buf, n as u16) + } + + /// Writes a signed 24 bit integer `n` to `buf`, stored in i32. + /// + /// # Panics + /// + /// Panics when `buf.len() < 3`. + /// + /// # Examples + /// + /// Write and read 24 bit `i32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_i24(&mut buf, -1_000_000); + /// assert_eq!(-1_000_000, LittleEndian::read_i24(&buf)); + /// ``` + #[inline] + fn write_i24(buf: &mut [u8], n: i32) { + Self::write_int(buf, n as i64, 3) + } + + /// Writes a signed 32 bit integer `n` to `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 4`. + /// + /// # Examples + /// + /// Write and read `i32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 4]; + /// LittleEndian::write_i32(&mut buf, -1_000_000); + /// assert_eq!(-1_000_000, LittleEndian::read_i32(&buf)); + /// ``` + #[inline] + fn write_i32(buf: &mut [u8], n: i32) { + Self::write_u32(buf, n as u32) + } + + /// Writes a signed 48 bit integer `n` to `buf`, stored in i64. + /// + /// # Panics + /// + /// Panics when `buf.len() < 6`. + /// + /// # Examples + /// + /// Write and read 48 bit `i64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 6]; + /// LittleEndian::write_i48(&mut buf, -1_000_000_000_000); + /// assert_eq!(-1_000_000_000_000, LittleEndian::read_i48(&buf)); + /// ``` + #[inline] + fn write_i48(buf: &mut [u8], n: i64) { + Self::write_int(buf, n as i64, 6) + } + + /// Writes a signed 64 bit integer `n` to `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 8`. + /// + /// # Examples + /// + /// Write and read `i64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 8]; + /// LittleEndian::write_i64(&mut buf, -1_000_000_000); + /// assert_eq!(-1_000_000_000, LittleEndian::read_i64(&buf)); + /// ``` + #[inline] + fn write_i64(buf: &mut [u8], n: i64) { + Self::write_u64(buf, n as u64) + } + + /// Writes a signed 128 bit integer `n` to `buf`. + /// + /// # Panics + /// + /// Panics when `buf.len() < 16`. + /// + /// # Examples + /// + /// Write and read n-byte `i128` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 16]; + /// LittleEndian::write_i128(&mut buf, -1_000_000_000); + /// assert_eq!(-1_000_000_000, LittleEndian::read_i128(&buf)); + /// ``` + #[inline] + fn write_i128(buf: &mut [u8], n: i128) { + Self::write_u128(buf, n as u128) + } + + /// Writes a signed integer `n` to `buf` using only `nbytes`. + /// + /// # Panics + /// + /// If `n` is not representable in `nbytes`, or if `nbytes` is `> 8`, then + /// this method panics. + /// + /// # Examples + /// + /// Write and read an n-byte number in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_int(&mut buf, -1_000, 3); + /// assert_eq!(-1_000, LittleEndian::read_int(&buf, 3)); + /// ``` + #[inline] + fn write_int(buf: &mut [u8], n: i64, nbytes: usize) { + Self::write_uint(buf, unextend_sign(n, nbytes), nbytes) + } + + /// Writes a signed integer `n` to `buf` using only `nbytes`. + /// + /// # Panics + /// + /// If `n` is not representable in `nbytes`, or if `nbytes` is `> 16`, then + /// this method panics. + /// + /// # Examples + /// + /// Write and read n-length signed numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut buf = [0; 3]; + /// LittleEndian::write_int128(&mut buf, -1_000, 3); + /// assert_eq!(-1_000, LittleEndian::read_int128(&buf, 3)); + /// ``` + #[inline] + fn write_int128(buf: &mut [u8], n: i128, nbytes: usize) { + Self::write_uint128(buf, unextend_sign128(n, nbytes), nbytes) + } + + /// Writes a IEEE754 single-precision (4 bytes) floating point number. + /// + /// # Panics + /// + /// Panics when `buf.len() < 4`. + /// + /// # Examples + /// + /// Write and read `f32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let e = 2.71828; + /// let mut buf = [0; 4]; + /// LittleEndian::write_f32(&mut buf, e); + /// assert_eq!(e, LittleEndian::read_f32(&buf)); + /// ``` + #[inline] + fn write_f32(buf: &mut [u8], n: f32) { + Self::write_u32(buf, n.to_bits()) + } + + /// Writes a IEEE754 double-precision (8 bytes) floating point number. + /// + /// # Panics + /// + /// Panics when `buf.len() < 8`. + /// + /// # Examples + /// + /// Write and read `f64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let phi = 1.6180339887; + /// let mut buf = [0; 8]; + /// LittleEndian::write_f64(&mut buf, phi); + /// assert_eq!(phi, LittleEndian::read_f64(&buf)); + /// ``` + #[inline] + fn write_f64(buf: &mut [u8], n: f64) { + Self::write_u64(buf, n.to_bits()) + } + + /// Reads unsigned 16 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 2*dst.len()`. + /// + /// # Examples + /// + /// Write and read `u16` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 8]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_u16_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_u16_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn read_u16_into(src: &[u8], dst: &mut [u16]); + + /// Reads unsigned 32 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 4*dst.len()`. + /// + /// # Examples + /// + /// Write and read `u32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 16]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_u32_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_u32_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn read_u32_into(src: &[u8], dst: &mut [u32]); + + /// Reads unsigned 64 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 8*dst.len()`. + /// + /// # Examples + /// + /// Write and read `u64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 32]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_u64_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_u64_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn read_u64_into(src: &[u8], dst: &mut [u64]); + + /// Reads unsigned 128 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 16*dst.len()`. + /// + /// # Examples + /// + /// Write and read `u128` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 64]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_u128_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_u128_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn read_u128_into(src: &[u8], dst: &mut [u128]); + + /// Reads signed 16 bit integers from `src` to `dst`. + /// + /// # Panics + /// + /// Panics when `buf.len() != 2*dst.len()`. + /// + /// # Examples + /// + /// Write and read `i16` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 8]; + /// let numbers_given = [1, 2, 0x0f, 0xee]; + /// LittleEndian::write_i16_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_i16_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + #[inline] + fn read_i16_into(src: &[u8], dst: &mut [i16]) { + let dst = unsafe { + slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u16, dst.len()) + }; + Self::read_u16_into(src, dst) + } + + /// Reads signed 32 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 4*dst.len()`. + /// + /// # Examples + /// + /// Write and read `i32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 16]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_i32_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_i32_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + #[inline] + fn read_i32_into(src: &[u8], dst: &mut [i32]) { + let dst = unsafe { + slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u32, dst.len()) + }; + Self::read_u32_into(src, dst); + } + + /// Reads signed 64 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 8*dst.len()`. + /// + /// # Examples + /// + /// Write and read `i64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 32]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_i64_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_i64_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + #[inline] + fn read_i64_into(src: &[u8], dst: &mut [i64]) { + let dst = unsafe { + slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u64, dst.len()) + }; + Self::read_u64_into(src, dst); + } + + /// Reads signed 128 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 16*dst.len()`. + /// + /// # Examples + /// + /// Write and read `i128` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 64]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_i128_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_i128_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + #[inline] + fn read_i128_into(src: &[u8], dst: &mut [i128]) { + let dst = unsafe { + slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u128, dst.len()) + }; + Self::read_u128_into(src, dst); + } + + /// Reads IEEE754 single-precision (4 bytes) floating point numbers from + /// `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 4*dst.len()`. + /// + /// # Examples + /// + /// Write and read `f32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 16]; + /// let numbers_given = [1.0, 2.0, 31.312e31, -11.32e19]; + /// LittleEndian::write_f32_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0.0; 4]; + /// LittleEndian::read_f32_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + #[inline] + fn read_f32_into(src: &[u8], dst: &mut [f32]) { + let dst = unsafe { + slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u32, dst.len()) + }; + Self::read_u32_into(src, dst); + } + + /// **DEPRECATED**. + /// + /// This method is deprecated. Use `read_f32_into` instead. + /// Reads IEEE754 single-precision (4 bytes) floating point numbers from + /// `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 4*dst.len()`. + /// + /// # Examples + /// + /// Write and read `f32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 16]; + /// let numbers_given = [1.0, 2.0, 31.312e31, -11.32e19]; + /// LittleEndian::write_f32_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0.0; 4]; + /// LittleEndian::read_f32_into_unchecked(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + #[inline] + #[deprecated(since = "1.3.0", note = "please use `read_f32_into` instead")] + fn read_f32_into_unchecked(src: &[u8], dst: &mut [f32]) { + Self::read_f32_into(src, dst); + } + + /// Reads IEEE754 single-precision (4 bytes) floating point numbers from + /// `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 8*dst.len()`. + /// + /// # Examples + /// + /// Write and read `f64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 32]; + /// let numbers_given = [1.0, 2.0, 31.312e211, -11.32e91]; + /// LittleEndian::write_f64_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0.0; 4]; + /// LittleEndian::read_f64_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + #[inline] + fn read_f64_into(src: &[u8], dst: &mut [f64]) { + let dst = unsafe { + slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u64, dst.len()) + }; + Self::read_u64_into(src, dst); + } + + /// **DEPRECATED**. + /// + /// This method is deprecated. Use `read_f64_into` instead. + /// + /// Reads IEEE754 single-precision (4 bytes) floating point numbers from + /// `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 8*dst.len()`. + /// + /// # Examples + /// + /// Write and read `f64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 32]; + /// let numbers_given = [1.0, 2.0, 31.312e211, -11.32e91]; + /// LittleEndian::write_f64_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0.0; 4]; + /// LittleEndian::read_f64_into_unchecked(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + #[inline] + #[deprecated(since = "1.3.0", note = "please use `read_f64_into` instead")] + fn read_f64_into_unchecked(src: &[u8], dst: &mut [f64]) { + Self::read_f64_into(src, dst); + } + + /// Writes unsigned 16 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `dst.len() != 2*src.len()`. + /// + /// # Examples + /// + /// Write and read `u16` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 8]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_u16_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_u16_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn write_u16_into(src: &[u16], dst: &mut [u8]); + + /// Writes unsigned 32 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `dst.len() != 4*src.len()`. + /// + /// # Examples + /// + /// Write and read `u32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 16]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_u32_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_u32_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn write_u32_into(src: &[u32], dst: &mut [u8]); + + /// Writes unsigned 64 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `dst.len() != 8*src.len()`. + /// + /// # Examples + /// + /// Write and read `u64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 32]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_u64_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_u64_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn write_u64_into(src: &[u64], dst: &mut [u8]); + + /// Writes unsigned 128 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `dst.len() != 16*src.len()`. + /// + /// # Examples + /// + /// Write and read `u128` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 64]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_u128_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_u128_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn write_u128_into(src: &[u128], dst: &mut [u8]); + + /// Writes signed 8 bit integers from `src` into `dst`. + /// + /// Note that since each `i8` is a single byte, no byte order conversions + /// are used. This method is included because it provides a safe, simple + /// way for the caller to write from a `&[i8]` buffer. (Without this + /// method, the caller would have to either use `unsafe` code or convert + /// each byte to `u8` individually.) + /// + /// # Panics + /// + /// Panics when `buf.len() != src.len()`. + /// + /// # Examples + /// + /// Write and read `i8` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian, ReadBytesExt}; + /// + /// let mut bytes = [0; 4]; + /// let numbers_given = [1, 2, 0xf, 0xe]; + /// LittleEndian::write_i8_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// bytes.as_ref().read_i8_into(&mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn write_i8_into(src: &[i8], dst: &mut [u8]) { + let src = unsafe { + slice::from_raw_parts(src.as_ptr() as *const u8, src.len()) + }; + dst.copy_from_slice(src); + } + + /// Writes signed 16 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `buf.len() != 2*src.len()`. + /// + /// # Examples + /// + /// Write and read `i16` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 8]; + /// let numbers_given = [1, 2, 0x0f, 0xee]; + /// LittleEndian::write_i16_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_i16_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn write_i16_into(src: &[i16], dst: &mut [u8]) { + let src = unsafe { + slice::from_raw_parts(src.as_ptr() as *const u16, src.len()) + }; + Self::write_u16_into(src, dst); + } + + /// Writes signed 32 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `dst.len() != 4*src.len()`. + /// + /// # Examples + /// + /// Write and read `i32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 16]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_i32_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_i32_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn write_i32_into(src: &[i32], dst: &mut [u8]) { + let src = unsafe { + slice::from_raw_parts(src.as_ptr() as *const u32, src.len()) + }; + Self::write_u32_into(src, dst); + } + + /// Writes signed 64 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `dst.len() != 8*src.len()`. + /// + /// # Examples + /// + /// Write and read `i64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 32]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_i64_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_i64_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn write_i64_into(src: &[i64], dst: &mut [u8]) { + let src = unsafe { + slice::from_raw_parts(src.as_ptr() as *const u64, src.len()) + }; + Self::write_u64_into(src, dst); + } + + /// Writes signed 128 bit integers from `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `dst.len() != 16*src.len()`. + /// + /// # Examples + /// + /// Write and read `i128` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 64]; + /// let numbers_given = [1, 2, 0xf00f, 0xffee]; + /// LittleEndian::write_i128_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0; 4]; + /// LittleEndian::read_i128_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn write_i128_into(src: &[i128], dst: &mut [u8]) { + let src = unsafe { + slice::from_raw_parts(src.as_ptr() as *const u128, src.len()) + }; + Self::write_u128_into(src, dst); + } + + /// Writes IEEE754 single-precision (4 bytes) floating point numbers from + /// `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 4*dst.len()`. + /// + /// # Examples + /// + /// Write and read `f32` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 16]; + /// let numbers_given = [1.0, 2.0, 31.312e31, -11.32e19]; + /// LittleEndian::write_f32_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0.0; 4]; + /// LittleEndian::read_f32_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn write_f32_into(src: &[f32], dst: &mut [u8]) { + let src = unsafe { + slice::from_raw_parts(src.as_ptr() as *const u32, src.len()) + }; + Self::write_u32_into(src, dst); + } + + /// Writes IEEE754 double-precision (8 bytes) floating point numbers from + /// `src` into `dst`. + /// + /// # Panics + /// + /// Panics when `src.len() != 8*dst.len()`. + /// + /// # Examples + /// + /// Write and read `f64` numbers in little endian order: + /// + /// ```rust + /// use byteorder::{ByteOrder, LittleEndian}; + /// + /// let mut bytes = [0; 32]; + /// let numbers_given = [1.0, 2.0, 31.312e211, -11.32e91]; + /// LittleEndian::write_f64_into(&numbers_given, &mut bytes); + /// + /// let mut numbers_got = [0.0; 4]; + /// LittleEndian::read_f64_into(&bytes, &mut numbers_got); + /// assert_eq!(numbers_given, numbers_got); + /// ``` + fn write_f64_into(src: &[f64], dst: &mut [u8]) { + let src = unsafe { + slice::from_raw_parts(src.as_ptr() as *const u64, src.len()) + }; + Self::write_u64_into(src, dst); + } + + /// Converts the given slice of unsigned 16 bit integers to a particular + /// endianness. + /// + /// If the endianness matches the endianness of the host platform, then + /// this is a no-op. + /// + /// # Examples + /// + /// Convert the host platform's endianness to big-endian: + /// + /// ```rust + /// use byteorder::{ByteOrder, BigEndian}; + /// + /// let mut numbers = [5, 65000]; + /// BigEndian::from_slice_u16(&mut numbers); + /// assert_eq!(numbers, [5u16.to_be(), 65000u16.to_be()]); + /// ``` + fn from_slice_u16(numbers: &mut [u16]); + + /// Converts the given slice of unsigned 32 bit integers to a particular + /// endianness. + /// + /// If the endianness matches the endianness of the host platform, then + /// this is a no-op. + /// + /// # Examples + /// + /// Convert the host platform's endianness to big-endian: + /// + /// ```rust + /// use byteorder::{ByteOrder, BigEndian}; + /// + /// let mut numbers = [5, 65000]; + /// BigEndian::from_slice_u32(&mut numbers); + /// assert_eq!(numbers, [5u32.to_be(), 65000u32.to_be()]); + /// ``` + fn from_slice_u32(numbers: &mut [u32]); + + /// Converts the given slice of unsigned 64 bit integers to a particular + /// endianness. + /// + /// If the endianness matches the endianness of the host platform, then + /// this is a no-op. + /// + /// # Examples + /// + /// Convert the host platform's endianness to big-endian: + /// + /// ```rust + /// use byteorder::{ByteOrder, BigEndian}; + /// + /// let mut numbers = [5, 65000]; + /// BigEndian::from_slice_u64(&mut numbers); + /// assert_eq!(numbers, [5u64.to_be(), 65000u64.to_be()]); + /// ``` + fn from_slice_u64(numbers: &mut [u64]); + + /// Converts the given slice of unsigned 128 bit integers to a particular + /// endianness. + /// + /// If the endianness matches the endianness of the host platform, then + /// this is a no-op. + /// + /// # Examples + /// + /// Convert the host platform's endianness to big-endian: + /// + /// ```rust + /// use byteorder::{ByteOrder, BigEndian}; + /// + /// let mut numbers = [5, 65000]; + /// BigEndian::from_slice_u128(&mut numbers); + /// assert_eq!(numbers, [5u128.to_be(), 65000u128.to_be()]); + /// ``` + fn from_slice_u128(numbers: &mut [u128]); + + /// Converts the given slice of signed 16 bit integers to a particular + /// endianness. + /// + /// If the endianness matches the endianness of the host platform, then + /// this is a no-op. + /// + /// # Examples + /// + /// Convert the host platform's endianness to big-endian: + /// + /// ```rust + /// use byteorder::{ByteOrder, BigEndian}; + /// + /// let mut numbers = [5, 6500]; + /// BigEndian::from_slice_i16(&mut numbers); + /// assert_eq!(numbers, [5i16.to_be(), 6500i16.to_be()]); + /// ``` + #[inline] + fn from_slice_i16(src: &mut [i16]) { + let src = unsafe { + slice::from_raw_parts_mut(src.as_mut_ptr() as *mut u16, src.len()) + }; + Self::from_slice_u16(src); + } + + /// Converts the given slice of signed 32 bit integers to a particular + /// endianness. + /// + /// If the endianness matches the endianness of the host platform, then + /// this is a no-op. + /// + /// # Examples + /// + /// Convert the host platform's endianness to big-endian: + /// + /// ```rust + /// use byteorder::{ByteOrder, BigEndian}; + /// + /// let mut numbers = [5, 65000]; + /// BigEndian::from_slice_i32(&mut numbers); + /// assert_eq!(numbers, [5i32.to_be(), 65000i32.to_be()]); + /// ``` + #[inline] + fn from_slice_i32(src: &mut [i32]) { + let src = unsafe { + slice::from_raw_parts_mut(src.as_mut_ptr() as *mut u32, src.len()) + }; + Self::from_slice_u32(src); + } + + /// Converts the given slice of signed 64 bit integers to a particular + /// endianness. + /// + /// If the endianness matches the endianness of the host platform, then + /// this is a no-op. + /// + /// # Examples + /// + /// Convert the host platform's endianness to big-endian: + /// + /// ```rust + /// use byteorder::{ByteOrder, BigEndian}; + /// + /// let mut numbers = [5, 65000]; + /// BigEndian::from_slice_i64(&mut numbers); + /// assert_eq!(numbers, [5i64.to_be(), 65000i64.to_be()]); + /// ``` + #[inline] + fn from_slice_i64(src: &mut [i64]) { + let src = unsafe { + slice::from_raw_parts_mut(src.as_mut_ptr() as *mut u64, src.len()) + }; + Self::from_slice_u64(src); + } + + /// Converts the given slice of signed 128 bit integers to a particular + /// endianness. + /// + /// If the endianness matches the endianness of the host platform, then + /// this is a no-op. + /// + /// # Examples + /// + /// Convert the host platform's endianness to big-endian: + /// + /// ```rust + /// use byteorder::{ByteOrder, BigEndian}; + /// + /// let mut numbers = [5, 65000]; + /// BigEndian::from_slice_i128(&mut numbers); + /// assert_eq!(numbers, [5i128.to_be(), 65000i128.to_be()]); + /// ``` + #[inline] + fn from_slice_i128(src: &mut [i128]) { + let src = unsafe { + slice::from_raw_parts_mut(src.as_mut_ptr() as *mut u128, src.len()) + }; + Self::from_slice_u128(src); + } + + /// Converts the given slice of IEEE754 single-precision (4 bytes) floating + /// point numbers to a particular endianness. + /// + /// If the endianness matches the endianness of the host platform, then + /// this is a no-op. + fn from_slice_f32(numbers: &mut [f32]); + + /// Converts the given slice of IEEE754 double-precision (8 bytes) floating + /// point numbers to a particular endianness. + /// + /// If the endianness matches the endianness of the host platform, then + /// this is a no-op. + fn from_slice_f64(numbers: &mut [f64]); +} + +/// Defines big-endian serialization. +/// +/// Note that this type has no value constructor. It is used purely at the +/// type level. +/// +/// # Examples +/// +/// Write and read `u32` numbers in big endian order: +/// +/// ```rust +/// use byteorder::{ByteOrder, BigEndian}; +/// +/// let mut buf = [0; 4]; +/// BigEndian::write_u32(&mut buf, 1_000_000); +/// assert_eq!(1_000_000, BigEndian::read_u32(&buf)); +/// ``` +#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)] +pub enum BigEndian {} + +impl Default for BigEndian { + fn default() -> BigEndian { + panic!("BigEndian default") + } +} + +/// A type alias for [`BigEndian`]. +/// +/// [`BigEndian`]: enum.BigEndian.html +pub type BE = BigEndian; + +/// Defines little-endian serialization. +/// +/// Note that this type has no value constructor. It is used purely at the +/// type level. +/// +/// # Examples +/// +/// Write and read `u32` numbers in little endian order: +/// +/// ```rust +/// use byteorder::{ByteOrder, LittleEndian}; +/// +/// let mut buf = [0; 4]; +/// LittleEndian::write_u32(&mut buf, 1_000_000); +/// assert_eq!(1_000_000, LittleEndian::read_u32(&buf)); +/// ``` +#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)] +pub enum LittleEndian {} + +impl Default for LittleEndian { + fn default() -> LittleEndian { + panic!("LittleEndian default") + } +} + +/// A type alias for [`LittleEndian`]. +/// +/// [`LittleEndian`]: enum.LittleEndian.html +pub type LE = LittleEndian; + +/// Defines network byte order serialization. +/// +/// Network byte order is defined by [RFC 1700][1] to be big-endian, and is +/// referred to in several protocol specifications. This type is an alias of +/// [`BigEndian`]. +/// +/// [1]: https://tools.ietf.org/html/rfc1700 +/// +/// Note that this type has no value constructor. It is used purely at the +/// type level. +/// +/// # Examples +/// +/// Write and read `i16` numbers in big endian order: +/// +/// ```rust +/// use byteorder::{ByteOrder, NetworkEndian, BigEndian}; +/// +/// let mut buf = [0; 2]; +/// BigEndian::write_i16(&mut buf, -5_000); +/// assert_eq!(-5_000, NetworkEndian::read_i16(&buf)); +/// ``` +/// +/// [`BigEndian`]: enum.BigEndian.html +pub type NetworkEndian = BigEndian; + +/// Defines system native-endian serialization. +/// +/// Note that this type has no value constructor. It is used purely at the +/// type level. +/// +/// On this platform, this is an alias for [`LittleEndian`]. +/// +/// [`LittleEndian`]: enum.LittleEndian.html +#[cfg(target_endian = "little")] +pub type NativeEndian = LittleEndian; + +/// Defines system native-endian serialization. +/// +/// Note that this type has no value constructor. It is used purely at the +/// type level. +/// +/// On this platform, this is an alias for [`BigEndian`]. +/// +/// [`BigEndian`]: enum.BigEndian.html +#[cfg(target_endian = "big")] +pub type NativeEndian = BigEndian; + +/// Copies $size bytes from a number $n to a &mut [u8] $dst. $ty represents the +/// numeric type of $n and $which must be either to_be or to_le, depending on +/// which endianness one wants to use when writing to $dst. +/// +/// This macro is only safe to call when $ty is a numeric type and $size == +/// size_of::<$ty>() and where $dst is a &mut [u8]. +macro_rules! unsafe_write_num_bytes { + ($ty:ty, $size:expr, $n:expr, $dst:expr, $which:ident) => {{ + assert!($size <= $dst.len()); + unsafe { + // N.B. https://github.com/rust-lang/rust/issues/22776 + let bytes = *(&$n.$which() as *const _ as *const [u8; $size]); + copy_nonoverlapping((&bytes).as_ptr(), $dst.as_mut_ptr(), $size); + } + }}; +} + +/// Copies a &[u8] $src into a &mut [<numeric>] $dst for the endianness given +/// by $which (must be either to_be or to_le). +/// +/// This macro is only safe to call when $src and $dst are &[u8] and &mut [u8], +/// respectively. The macro will panic if $src.len() != $size * $dst.len(), +/// where $size represents the size of the integers encoded in $src. +macro_rules! unsafe_read_slice { + ($src:expr, $dst:expr, $size:expr, $which:ident) => {{ + assert_eq!($src.len(), $size * $dst.len()); + + unsafe { + copy_nonoverlapping( + $src.as_ptr(), + $dst.as_mut_ptr() as *mut u8, + $src.len(), + ); + } + for v in $dst.iter_mut() { + *v = v.$which(); + } + }}; +} + +/// Copies a &[$ty] $src into a &mut [u8] $dst, where $ty must be a numeric +/// type. This panics if size_of::<$ty>() * $src.len() != $dst.len(). +/// +/// This macro is only safe to call when $src is a slice of numeric types and +/// $dst is a &mut [u8] and where $ty represents the type of the integers in +/// $src. +macro_rules! unsafe_write_slice_native { + ($src:expr, $dst:expr, $ty:ty) => {{ + let size = core::mem::size_of::<$ty>(); + assert_eq!(size * $src.len(), $dst.len()); + + unsafe { + copy_nonoverlapping( + $src.as_ptr() as *const u8, + $dst.as_mut_ptr(), + $dst.len(), + ); + } + }}; +} + +macro_rules! write_slice { + ($src:expr, $dst:expr, $ty:ty, $size:expr, $write:expr) => {{ + assert!($size == ::core::mem::size_of::<$ty>()); + assert_eq!($size * $src.len(), $dst.len()); + + for (&n, chunk) in $src.iter().zip($dst.chunks_mut($size)) { + $write(chunk, n); + } + }}; +} + +impl ByteOrder for BigEndian { + #[inline] + fn read_u16(buf: &[u8]) -> u16 { + u16::from_be_bytes(buf[..2].try_into().unwrap()) + } + + #[inline] + fn read_u32(buf: &[u8]) -> u32 { + u32::from_be_bytes(buf[..4].try_into().unwrap()) + } + + #[inline] + fn read_u64(buf: &[u8]) -> u64 { + u64::from_be_bytes(buf[..8].try_into().unwrap()) + } + + #[inline] + fn read_u128(buf: &[u8]) -> u128 { + u128::from_be_bytes(buf[..16].try_into().unwrap()) + } + + #[inline] + fn read_uint(buf: &[u8], nbytes: usize) -> u64 { + assert!(1 <= nbytes && nbytes <= 8 && nbytes <= buf.len()); + let mut out = 0u64; + let ptr_out = &mut out as *mut u64 as *mut u8; + unsafe { + copy_nonoverlapping( + buf.as_ptr(), + ptr_out.offset((8 - nbytes) as isize), + nbytes, + ); + } + out.to_be() + } + + #[inline] + fn read_uint128(buf: &[u8], nbytes: usize) -> u128 { + assert!(1 <= nbytes && nbytes <= 16 && nbytes <= buf.len()); + let mut out: u128 = 0; + let ptr_out = &mut out as *mut u128 as *mut u8; + unsafe { + copy_nonoverlapping( + buf.as_ptr(), + ptr_out.offset((16 - nbytes) as isize), + nbytes, + ); + } + out.to_be() + } + + #[inline] + fn write_u16(buf: &mut [u8], n: u16) { + unsafe_write_num_bytes!(u16, 2, n, buf, to_be); + } + + #[inline] + fn write_u32(buf: &mut [u8], n: u32) { + unsafe_write_num_bytes!(u32, 4, n, buf, to_be); + } + + #[inline] + fn write_u64(buf: &mut [u8], n: u64) { + unsafe_write_num_bytes!(u64, 8, n, buf, to_be); + } + + #[inline] + fn write_u128(buf: &mut [u8], n: u128) { + unsafe_write_num_bytes!(u128, 16, n, buf, to_be); + } + + #[inline] + fn write_uint(buf: &mut [u8], n: u64, nbytes: usize) { + assert!(pack_size(n) <= nbytes && nbytes <= 8); + assert!(nbytes <= buf.len()); + unsafe { + let bytes = *(&n.to_be() as *const u64 as *const [u8; 8]); + copy_nonoverlapping( + bytes.as_ptr().offset((8 - nbytes) as isize), + buf.as_mut_ptr(), + nbytes, + ); + } + } + + #[inline] + fn write_uint128(buf: &mut [u8], n: u128, nbytes: usize) { + assert!(pack_size128(n) <= nbytes && nbytes <= 16); + assert!(nbytes <= buf.len()); + unsafe { + let bytes = *(&n.to_be() as *const u128 as *const [u8; 16]); + copy_nonoverlapping( + bytes.as_ptr().offset((16 - nbytes) as isize), + buf.as_mut_ptr(), + nbytes, + ); + } + } + + #[inline] + fn read_u16_into(src: &[u8], dst: &mut [u16]) { + unsafe_read_slice!(src, dst, 2, to_be); + } + + #[inline] + fn read_u32_into(src: &[u8], dst: &mut [u32]) { + unsafe_read_slice!(src, dst, 4, to_be); + } + + #[inline] + fn read_u64_into(src: &[u8], dst: &mut [u64]) { + unsafe_read_slice!(src, dst, 8, to_be); + } + + #[inline] + fn read_u128_into(src: &[u8], dst: &mut [u128]) { + unsafe_read_slice!(src, dst, 16, to_be); + } + + #[inline] + fn write_u16_into(src: &[u16], dst: &mut [u8]) { + if cfg!(target_endian = "big") { + unsafe_write_slice_native!(src, dst, u16); + } else { + write_slice!(src, dst, u16, 2, Self::write_u16); + } + } + + #[inline] + fn write_u32_into(src: &[u32], dst: &mut [u8]) { + if cfg!(target_endian = "big") { + unsafe_write_slice_native!(src, dst, u32); + } else { + write_slice!(src, dst, u32, 4, Self::write_u32); + } + } + + #[inline] + fn write_u64_into(src: &[u64], dst: &mut [u8]) { + if cfg!(target_endian = "big") { + unsafe_write_slice_native!(src, dst, u64); + } else { + write_slice!(src, dst, u64, 8, Self::write_u64); + } + } + + #[inline] + fn write_u128_into(src: &[u128], dst: &mut [u8]) { + if cfg!(target_endian = "big") { + unsafe_write_slice_native!(src, dst, u128); + } else { + write_slice!(src, dst, u128, 16, Self::write_u128); + } + } + + #[inline] + fn from_slice_u16(numbers: &mut [u16]) { + if cfg!(target_endian = "little") { + for n in numbers { + *n = n.to_be(); + } + } + } + + #[inline] + fn from_slice_u32(numbers: &mut [u32]) { + if cfg!(target_endian = "little") { + for n in numbers { + *n = n.to_be(); + } + } + } + + #[inline] + fn from_slice_u64(numbers: &mut [u64]) { + if cfg!(target_endian = "little") { + for n in numbers { + *n = n.to_be(); + } + } + } + + #[inline] + fn from_slice_u128(numbers: &mut [u128]) { + if cfg!(target_endian = "little") { + for n in numbers { + *n = n.to_be(); + } + } + } + + #[inline] + fn from_slice_f32(numbers: &mut [f32]) { + if cfg!(target_endian = "little") { + for n in numbers { + unsafe { + let int = *(n as *const f32 as *const u32); + *n = *(&int.to_be() as *const u32 as *const f32); + } + } + } + } + + #[inline] + fn from_slice_f64(numbers: &mut [f64]) { + if cfg!(target_endian = "little") { + for n in numbers { + unsafe { + let int = *(n as *const f64 as *const u64); + *n = *(&int.to_be() as *const u64 as *const f64); + } + } + } + } +} + +impl ByteOrder for LittleEndian { + #[inline] + fn read_u16(buf: &[u8]) -> u16 { + u16::from_le_bytes(buf[..2].try_into().unwrap()) + } + + #[inline] + fn read_u32(buf: &[u8]) -> u32 { + u32::from_le_bytes(buf[..4].try_into().unwrap()) + } + + #[inline] + fn read_u64(buf: &[u8]) -> u64 { + u64::from_le_bytes(buf[..8].try_into().unwrap()) + } + + #[inline] + fn read_u128(buf: &[u8]) -> u128 { + u128::from_le_bytes(buf[..16].try_into().unwrap()) + } + + #[inline] + fn read_uint(buf: &[u8], nbytes: usize) -> u64 { + assert!(1 <= nbytes && nbytes <= 8 && nbytes <= buf.len()); + let mut out = 0u64; + let ptr_out = &mut out as *mut u64 as *mut u8; + unsafe { + copy_nonoverlapping(buf.as_ptr(), ptr_out, nbytes); + } + out.to_le() + } + + #[inline] + fn read_uint128(buf: &[u8], nbytes: usize) -> u128 { + assert!(1 <= nbytes && nbytes <= 16 && nbytes <= buf.len()); + let mut out: u128 = 0; + let ptr_out = &mut out as *mut u128 as *mut u8; + unsafe { + copy_nonoverlapping(buf.as_ptr(), ptr_out, nbytes); + } + out.to_le() + } + + #[inline] + fn write_u16(buf: &mut [u8], n: u16) { + unsafe_write_num_bytes!(u16, 2, n, buf, to_le); + } + + #[inline] + fn write_u32(buf: &mut [u8], n: u32) { + unsafe_write_num_bytes!(u32, 4, n, buf, to_le); + } + + #[inline] + fn write_u64(buf: &mut [u8], n: u64) { + unsafe_write_num_bytes!(u64, 8, n, buf, to_le); + } + + #[inline] + fn write_u128(buf: &mut [u8], n: u128) { + unsafe_write_num_bytes!(u128, 16, n, buf, to_le); + } + + #[inline] + fn write_uint(buf: &mut [u8], n: u64, nbytes: usize) { + assert!(pack_size(n as u64) <= nbytes && nbytes <= 8); + assert!(nbytes <= buf.len()); + unsafe { + let bytes = *(&n.to_le() as *const u64 as *const [u8; 8]); + copy_nonoverlapping(bytes.as_ptr(), buf.as_mut_ptr(), nbytes); + } + } + + #[inline] + fn write_uint128(buf: &mut [u8], n: u128, nbytes: usize) { + assert!(pack_size128(n as u128) <= nbytes && nbytes <= 16); + assert!(nbytes <= buf.len()); + unsafe { + let bytes = *(&n.to_le() as *const u128 as *const [u8; 16]); + copy_nonoverlapping(bytes.as_ptr(), buf.as_mut_ptr(), nbytes); + } + } + + #[inline] + fn read_u16_into(src: &[u8], dst: &mut [u16]) { + unsafe_read_slice!(src, dst, 2, to_le); + } + + #[inline] + fn read_u32_into(src: &[u8], dst: &mut [u32]) { + unsafe_read_slice!(src, dst, 4, to_le); + } + + #[inline] + fn read_u64_into(src: &[u8], dst: &mut [u64]) { + unsafe_read_slice!(src, dst, 8, to_le); + } + + #[inline] + fn read_u128_into(src: &[u8], dst: &mut [u128]) { + unsafe_read_slice!(src, dst, 16, to_le); + } + + #[inline] + fn write_u16_into(src: &[u16], dst: &mut [u8]) { + if cfg!(target_endian = "little") { + unsafe_write_slice_native!(src, dst, u16); + } else { + write_slice!(src, dst, u16, 2, Self::write_u16); + } + } + + #[inline] + fn write_u32_into(src: &[u32], dst: &mut [u8]) { + if cfg!(target_endian = "little") { + unsafe_write_slice_native!(src, dst, u32); + } else { + write_slice!(src, dst, u32, 4, Self::write_u32); + } + } + + #[inline] + fn write_u64_into(src: &[u64], dst: &mut [u8]) { + if cfg!(target_endian = "little") { + unsafe_write_slice_native!(src, dst, u64); + } else { + write_slice!(src, dst, u64, 8, Self::write_u64); + } + } + + #[inline] + fn write_u128_into(src: &[u128], dst: &mut [u8]) { + if cfg!(target_endian = "little") { + unsafe_write_slice_native!(src, dst, u128); + } else { + write_slice!(src, dst, u128, 16, Self::write_u128); + } + } + + #[inline] + fn from_slice_u16(numbers: &mut [u16]) { + if cfg!(target_endian = "big") { + for n in numbers { + *n = n.to_le(); + } + } + } + + #[inline] + fn from_slice_u32(numbers: &mut [u32]) { + if cfg!(target_endian = "big") { + for n in numbers { + *n = n.to_le(); + } + } + } + + #[inline] + fn from_slice_u64(numbers: &mut [u64]) { + if cfg!(target_endian = "big") { + for n in numbers { + *n = n.to_le(); + } + } + } + + #[inline] + fn from_slice_u128(numbers: &mut [u128]) { + if cfg!(target_endian = "big") { + for n in numbers { + *n = n.to_le(); + } + } + } + + #[inline] + fn from_slice_f32(numbers: &mut [f32]) { + if cfg!(target_endian = "big") { + for n in numbers { + unsafe { + let int = *(n as *const f32 as *const u32); + *n = *(&int.to_le() as *const u32 as *const f32); + } + } + } + } + + #[inline] + fn from_slice_f64(numbers: &mut [f64]) { + if cfg!(target_endian = "big") { + for n in numbers { + unsafe { + let int = *(n as *const f64 as *const u64); + *n = *(&int.to_le() as *const u64 as *const f64); + } + } + } + } +} + +#[cfg(test)] +mod test { + use quickcheck::{Arbitrary, Gen, QuickCheck, StdGen, Testable}; + use rand::{thread_rng, Rng}; + + pub const U24_MAX: u32 = 16_777_215; + pub const I24_MAX: i32 = 8_388_607; + pub const U48_MAX: u64 = 281_474_976_710_655; + pub const I48_MAX: i64 = 140_737_488_355_327; + + pub const U64_MAX: u64 = ::core::u64::MAX; + pub const I64_MAX: u64 = ::core::i64::MAX as u64; + + macro_rules! calc_max { + ($max:expr, $bytes:expr) => { + calc_max!($max, $bytes, 8) + }; + ($max:expr, $bytes:expr, $maxbytes:expr) => { + ($max - 1) >> (8 * ($maxbytes - $bytes)) + }; + } + + #[derive(Clone, Debug)] + pub struct Wi128<T>(pub T); + + impl<T: Clone> Wi128<T> { + pub fn clone(&self) -> T { + self.0.clone() + } + } + + impl<T: PartialEq> PartialEq<T> for Wi128<T> { + fn eq(&self, other: &T) -> bool { + self.0.eq(other) + } + } + + impl Arbitrary for Wi128<u128> { + fn arbitrary<G: Gen>(gen: &mut G) -> Wi128<u128> { + let max = calc_max!(::core::u128::MAX, gen.size(), 16); + let output = (gen.gen::<u64>() as u128) + | ((gen.gen::<u64>() as u128) << 64); + Wi128(output & (max - 1)) + } + } + + impl Arbitrary for Wi128<i128> { + fn arbitrary<G: Gen>(gen: &mut G) -> Wi128<i128> { + let max = calc_max!(::core::i128::MAX, gen.size(), 16); + let output = (gen.gen::<i64>() as i128) + | ((gen.gen::<i64>() as i128) << 64); + Wi128(output & (max - 1)) + } + } + + pub fn qc_sized<A: Testable>(f: A, size: u64) { + QuickCheck::new() + .gen(StdGen::new(thread_rng(), size as usize)) + .tests(1_00) + .max_tests(10_000) + .quickcheck(f); + } + + macro_rules! qc_byte_order { + ($name:ident, $ty_int:ty, $max:expr, + $bytes:expr, $read:ident, $write:ident) => { + mod $name { + #[allow(unused_imports)] + use super::{qc_sized, Wi128}; + use crate::{ + BigEndian, ByteOrder, LittleEndian, NativeEndian, + }; + + #[test] + fn big_endian() { + fn prop(n: $ty_int) -> bool { + let mut buf = [0; 16]; + BigEndian::$write(&mut buf, n.clone(), $bytes); + n == BigEndian::$read(&buf[..$bytes], $bytes) + } + qc_sized(prop as fn($ty_int) -> bool, $max); + } + + #[test] + fn little_endian() { + fn prop(n: $ty_int) -> bool { + let mut buf = [0; 16]; + LittleEndian::$write(&mut buf, n.clone(), $bytes); + n == LittleEndian::$read(&buf[..$bytes], $bytes) + } + qc_sized(prop as fn($ty_int) -> bool, $max); + } + + #[test] + fn native_endian() { + fn prop(n: $ty_int) -> bool { + let mut buf = [0; 16]; + NativeEndian::$write(&mut buf, n.clone(), $bytes); + n == NativeEndian::$read(&buf[..$bytes], $bytes) + } + qc_sized(prop as fn($ty_int) -> bool, $max); + } + } + }; + ($name:ident, $ty_int:ty, $max:expr, + $read:ident, $write:ident) => { + mod $name { + #[allow(unused_imports)] + use super::{qc_sized, Wi128}; + use crate::{ + BigEndian, ByteOrder, LittleEndian, NativeEndian, + }; + use core::mem::size_of; + + #[test] + fn big_endian() { + fn prop(n: $ty_int) -> bool { + let bytes = size_of::<$ty_int>(); + let mut buf = [0; 16]; + BigEndian::$write(&mut buf[16 - bytes..], n.clone()); + n == BigEndian::$read(&buf[16 - bytes..]) + } + qc_sized(prop as fn($ty_int) -> bool, $max - 1); + } + + #[test] + fn little_endian() { + fn prop(n: $ty_int) -> bool { + let bytes = size_of::<$ty_int>(); + let mut buf = [0; 16]; + LittleEndian::$write(&mut buf[..bytes], n.clone()); + n == LittleEndian::$read(&buf[..bytes]) + } + qc_sized(prop as fn($ty_int) -> bool, $max - 1); + } + + #[test] + fn native_endian() { + fn prop(n: $ty_int) -> bool { + let bytes = size_of::<$ty_int>(); + let mut buf = [0; 16]; + NativeEndian::$write(&mut buf[..bytes], n.clone()); + n == NativeEndian::$read(&buf[..bytes]) + } + qc_sized(prop as fn($ty_int) -> bool, $max - 1); + } + } + }; + } + + qc_byte_order!( + prop_u16, + u16, + ::core::u16::MAX as u64, + read_u16, + write_u16 + ); + qc_byte_order!( + prop_i16, + i16, + ::core::i16::MAX as u64, + read_i16, + write_i16 + ); + qc_byte_order!( + prop_u24, + u32, + crate::test::U24_MAX as u64, + read_u24, + write_u24 + ); + qc_byte_order!( + prop_i24, + i32, + crate::test::I24_MAX as u64, + read_i24, + write_i24 + ); + qc_byte_order!( + prop_u32, + u32, + ::core::u32::MAX as u64, + read_u32, + write_u32 + ); + qc_byte_order!( + prop_i32, + i32, + ::core::i32::MAX as u64, + read_i32, + write_i32 + ); + qc_byte_order!( + prop_u48, + u64, + crate::test::U48_MAX as u64, + read_u48, + write_u48 + ); + qc_byte_order!( + prop_i48, + i64, + crate::test::I48_MAX as u64, + read_i48, + write_i48 + ); + qc_byte_order!( + prop_u64, + u64, + ::core::u64::MAX as u64, + read_u64, + write_u64 + ); + qc_byte_order!( + prop_i64, + i64, + ::core::i64::MAX as u64, + read_i64, + write_i64 + ); + qc_byte_order!( + prop_f32, + f32, + ::core::u64::MAX as u64, + read_f32, + write_f32 + ); + qc_byte_order!( + prop_f64, + f64, + ::core::i64::MAX as u64, + read_f64, + write_f64 + ); + + qc_byte_order!(prop_u128, Wi128<u128>, 16 + 1, read_u128, write_u128); + qc_byte_order!(prop_i128, Wi128<i128>, 16 + 1, read_i128, write_i128); + + qc_byte_order!( + prop_uint_1, + u64, + calc_max!(super::U64_MAX, 1), + 1, + read_uint, + write_uint + ); + qc_byte_order!( + prop_uint_2, + u64, + calc_max!(super::U64_MAX, 2), + 2, + read_uint, + write_uint + ); + qc_byte_order!( + prop_uint_3, + u64, + calc_max!(super::U64_MAX, 3), + 3, + read_uint, + write_uint + ); + qc_byte_order!( + prop_uint_4, + u64, + calc_max!(super::U64_MAX, 4), + 4, + read_uint, + write_uint + ); + qc_byte_order!( + prop_uint_5, + u64, + calc_max!(super::U64_MAX, 5), + 5, + read_uint, + write_uint + ); + qc_byte_order!( + prop_uint_6, + u64, + calc_max!(super::U64_MAX, 6), + 6, + read_uint, + write_uint + ); + qc_byte_order!( + prop_uint_7, + u64, + calc_max!(super::U64_MAX, 7), + 7, + read_uint, + write_uint + ); + qc_byte_order!( + prop_uint_8, + u64, + calc_max!(super::U64_MAX, 8), + 8, + read_uint, + write_uint + ); + + qc_byte_order!( + prop_uint128_1, + Wi128<u128>, + 1, + 1, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_2, + Wi128<u128>, + 2, + 2, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_3, + Wi128<u128>, + 3, + 3, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_4, + Wi128<u128>, + 4, + 4, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_5, + Wi128<u128>, + 5, + 5, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_6, + Wi128<u128>, + 6, + 6, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_7, + Wi128<u128>, + 7, + 7, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_8, + Wi128<u128>, + 8, + 8, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_9, + Wi128<u128>, + 9, + 9, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_10, + Wi128<u128>, + 10, + 10, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_11, + Wi128<u128>, + 11, + 11, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_12, + Wi128<u128>, + 12, + 12, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_13, + Wi128<u128>, + 13, + 13, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_14, + Wi128<u128>, + 14, + 14, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_15, + Wi128<u128>, + 15, + 15, + read_uint128, + write_uint128 + ); + qc_byte_order!( + prop_uint128_16, + Wi128<u128>, + 16, + 16, + read_uint128, + write_uint128 + ); + + qc_byte_order!( + prop_int_1, + i64, + calc_max!(super::I64_MAX, 1), + 1, + read_int, + write_int + ); + qc_byte_order!( + prop_int_2, + i64, + calc_max!(super::I64_MAX, 2), + 2, + read_int, + write_int + ); + qc_byte_order!( + prop_int_3, + i64, + calc_max!(super::I64_MAX, 3), + 3, + read_int, + write_int + ); + qc_byte_order!( + prop_int_4, + i64, + calc_max!(super::I64_MAX, 4), + 4, + read_int, + write_int + ); + qc_byte_order!( + prop_int_5, + i64, + calc_max!(super::I64_MAX, 5), + 5, + read_int, + write_int + ); + qc_byte_order!( + prop_int_6, + i64, + calc_max!(super::I64_MAX, 6), + 6, + read_int, + write_int + ); + qc_byte_order!( + prop_int_7, + i64, + calc_max!(super::I64_MAX, 7), + 7, + read_int, + write_int + ); + qc_byte_order!( + prop_int_8, + i64, + calc_max!(super::I64_MAX, 8), + 8, + read_int, + write_int + ); + + qc_byte_order!( + prop_int128_1, + Wi128<i128>, + 1, + 1, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_2, + Wi128<i128>, + 2, + 2, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_3, + Wi128<i128>, + 3, + 3, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_4, + Wi128<i128>, + 4, + 4, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_5, + Wi128<i128>, + 5, + 5, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_6, + Wi128<i128>, + 6, + 6, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_7, + Wi128<i128>, + 7, + 7, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_8, + Wi128<i128>, + 8, + 8, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_9, + Wi128<i128>, + 9, + 9, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_10, + Wi128<i128>, + 10, + 10, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_11, + Wi128<i128>, + 11, + 11, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_12, + Wi128<i128>, + 12, + 12, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_13, + Wi128<i128>, + 13, + 13, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_14, + Wi128<i128>, + 14, + 14, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_15, + Wi128<i128>, + 15, + 15, + read_int128, + write_int128 + ); + qc_byte_order!( + prop_int128_16, + Wi128<i128>, + 16, + 16, + read_int128, + write_int128 + ); + + // Test that all of the byte conversion functions panic when given a + // buffer that is too small. + // + // These tests are critical to ensure safety, otherwise we might end up + // with a buffer overflow. + macro_rules! too_small { + ($name:ident, $maximally_small:expr, $zero:expr, + $read:ident, $write:ident) => { + mod $name { + use crate::{ + BigEndian, ByteOrder, LittleEndian, NativeEndian, + }; + + #[test] + #[should_panic] + fn read_big_endian() { + let buf = [0; $maximally_small]; + BigEndian::$read(&buf); + } + + #[test] + #[should_panic] + fn read_little_endian() { + let buf = [0; $maximally_small]; + LittleEndian::$read(&buf); + } + + #[test] + #[should_panic] + fn read_native_endian() { + let buf = [0; $maximally_small]; + NativeEndian::$read(&buf); + } + + #[test] + #[should_panic] + fn write_big_endian() { + let mut buf = [0; $maximally_small]; + BigEndian::$write(&mut buf, $zero); + } + + #[test] + #[should_panic] + fn write_little_endian() { + let mut buf = [0; $maximally_small]; + LittleEndian::$write(&mut buf, $zero); + } + + #[test] + #[should_panic] + fn write_native_endian() { + let mut buf = [0; $maximally_small]; + NativeEndian::$write(&mut buf, $zero); + } + } + }; + ($name:ident, $maximally_small:expr, $read:ident) => { + mod $name { + use crate::{ + BigEndian, ByteOrder, LittleEndian, NativeEndian, + }; + + #[test] + #[should_panic] + fn read_big_endian() { + let buf = [0; $maximally_small]; + BigEndian::$read(&buf, $maximally_small + 1); + } + + #[test] + #[should_panic] + fn read_little_endian() { + let buf = [0; $maximally_small]; + LittleEndian::$read(&buf, $maximally_small + 1); + } + + #[test] + #[should_panic] + fn read_native_endian() { + let buf = [0; $maximally_small]; + NativeEndian::$read(&buf, $maximally_small + 1); + } + } + }; + } + + too_small!(small_u16, 1, 0, read_u16, write_u16); + too_small!(small_i16, 1, 0, read_i16, write_i16); + too_small!(small_u32, 3, 0, read_u32, write_u32); + too_small!(small_i32, 3, 0, read_i32, write_i32); + too_small!(small_u64, 7, 0, read_u64, write_u64); + too_small!(small_i64, 7, 0, read_i64, write_i64); + too_small!(small_f32, 3, 0.0, read_f32, write_f32); + too_small!(small_f64, 7, 0.0, read_f64, write_f64); + too_small!(small_u128, 15, 0, read_u128, write_u128); + too_small!(small_i128, 15, 0, read_i128, write_i128); + + too_small!(small_uint_1, 1, read_uint); + too_small!(small_uint_2, 2, read_uint); + too_small!(small_uint_3, 3, read_uint); + too_small!(small_uint_4, 4, read_uint); + too_small!(small_uint_5, 5, read_uint); + too_small!(small_uint_6, 6, read_uint); + too_small!(small_uint_7, 7, read_uint); + + too_small!(small_uint128_1, 1, read_uint128); + too_small!(small_uint128_2, 2, read_uint128); + too_small!(small_uint128_3, 3, read_uint128); + too_small!(small_uint128_4, 4, read_uint128); + too_small!(small_uint128_5, 5, read_uint128); + too_small!(small_uint128_6, 6, read_uint128); + too_small!(small_uint128_7, 7, read_uint128); + too_small!(small_uint128_8, 8, read_uint128); + too_small!(small_uint128_9, 9, read_uint128); + too_small!(small_uint128_10, 10, read_uint128); + too_small!(small_uint128_11, 11, read_uint128); + too_small!(small_uint128_12, 12, read_uint128); + too_small!(small_uint128_13, 13, read_uint128); + too_small!(small_uint128_14, 14, read_uint128); + too_small!(small_uint128_15, 15, read_uint128); + + too_small!(small_int_1, 1, read_int); + too_small!(small_int_2, 2, read_int); + too_small!(small_int_3, 3, read_int); + too_small!(small_int_4, 4, read_int); + too_small!(small_int_5, 5, read_int); + too_small!(small_int_6, 6, read_int); + too_small!(small_int_7, 7, read_int); + + too_small!(small_int128_1, 1, read_int128); + too_small!(small_int128_2, 2, read_int128); + too_small!(small_int128_3, 3, read_int128); + too_small!(small_int128_4, 4, read_int128); + too_small!(small_int128_5, 5, read_int128); + too_small!(small_int128_6, 6, read_int128); + too_small!(small_int128_7, 7, read_int128); + too_small!(small_int128_8, 8, read_int128); + too_small!(small_int128_9, 9, read_int128); + too_small!(small_int128_10, 10, read_int128); + too_small!(small_int128_11, 11, read_int128); + too_small!(small_int128_12, 12, read_int128); + too_small!(small_int128_13, 13, read_int128); + too_small!(small_int128_14, 14, read_int128); + too_small!(small_int128_15, 15, read_int128); + + // Test that reading/writing slices enforces the correct lengths. + macro_rules! slice_lengths { + ($name:ident, $read:ident, $write:ident, + $num_bytes:expr, $numbers:expr) => { + mod $name { + use crate::{ + BigEndian, ByteOrder, LittleEndian, NativeEndian, + }; + + #[test] + #[should_panic] + fn read_big_endian() { + let bytes = [0; $num_bytes]; + let mut numbers = $numbers; + BigEndian::$read(&bytes, &mut numbers); + } + + #[test] + #[should_panic] + fn read_little_endian() { + let bytes = [0; $num_bytes]; + let mut numbers = $numbers; + LittleEndian::$read(&bytes, &mut numbers); + } + + #[test] + #[should_panic] + fn read_native_endian() { + let bytes = [0; $num_bytes]; + let mut numbers = $numbers; + NativeEndian::$read(&bytes, &mut numbers); + } + + #[test] + #[should_panic] + fn write_big_endian() { + let mut bytes = [0; $num_bytes]; + let numbers = $numbers; + BigEndian::$write(&numbers, &mut bytes); + } + + #[test] + #[should_panic] + fn write_little_endian() { + let mut bytes = [0; $num_bytes]; + let numbers = $numbers; + LittleEndian::$write(&numbers, &mut bytes); + } + + #[test] + #[should_panic] + fn write_native_endian() { + let mut bytes = [0; $num_bytes]; + let numbers = $numbers; + NativeEndian::$write(&numbers, &mut bytes); + } + } + }; + } + + slice_lengths!( + slice_len_too_small_u16, + read_u16_into, + write_u16_into, + 3, + [0, 0] + ); + slice_lengths!( + slice_len_too_big_u16, + read_u16_into, + write_u16_into, + 5, + [0, 0] + ); + slice_lengths!( + slice_len_too_small_i16, + read_i16_into, + write_i16_into, + 3, + [0, 0] + ); + slice_lengths!( + slice_len_too_big_i16, + read_i16_into, + write_i16_into, + 5, + [0, 0] + ); + + slice_lengths!( + slice_len_too_small_u32, + read_u32_into, + write_u32_into, + 7, + [0, 0] + ); + slice_lengths!( + slice_len_too_big_u32, + read_u32_into, + write_u32_into, + 9, + [0, 0] + ); + slice_lengths!( + slice_len_too_small_i32, + read_i32_into, + write_i32_into, + 7, + [0, 0] + ); + slice_lengths!( + slice_len_too_big_i32, + read_i32_into, + write_i32_into, + 9, + [0, 0] + ); + + slice_lengths!( + slice_len_too_small_u64, + read_u64_into, + write_u64_into, + 15, + [0, 0] + ); + slice_lengths!( + slice_len_too_big_u64, + read_u64_into, + write_u64_into, + 17, + [0, 0] + ); + slice_lengths!( + slice_len_too_small_i64, + read_i64_into, + write_i64_into, + 15, + [0, 0] + ); + slice_lengths!( + slice_len_too_big_i64, + read_i64_into, + write_i64_into, + 17, + [0, 0] + ); + + slice_lengths!( + slice_len_too_small_u128, + read_u128_into, + write_u128_into, + 31, + [0, 0] + ); + slice_lengths!( + slice_len_too_big_u128, + read_u128_into, + write_u128_into, + 33, + [0, 0] + ); + slice_lengths!( + slice_len_too_small_i128, + read_i128_into, + write_i128_into, + 31, + [0, 0] + ); + slice_lengths!( + slice_len_too_big_i128, + read_i128_into, + write_i128_into, + 33, + [0, 0] + ); + + #[test] + fn uint_bigger_buffer() { + use crate::{ByteOrder, LittleEndian}; + let n = LittleEndian::read_uint(&[1, 2, 3, 4, 5, 6, 7, 8], 5); + assert_eq!(n, 0x05_0403_0201); + } + + #[test] + fn regression173_array_impl() { + use crate::{BigEndian, ByteOrder, LittleEndian}; + + let xs = [0; 100]; + + let x = BigEndian::read_u16(&xs); + assert_eq!(x, 0); + let x = BigEndian::read_u32(&xs); + assert_eq!(x, 0); + let x = BigEndian::read_u64(&xs); + assert_eq!(x, 0); + let x = BigEndian::read_u128(&xs); + assert_eq!(x, 0); + let x = BigEndian::read_i16(&xs); + assert_eq!(x, 0); + let x = BigEndian::read_i32(&xs); + assert_eq!(x, 0); + let x = BigEndian::read_i64(&xs); + assert_eq!(x, 0); + let x = BigEndian::read_i128(&xs); + assert_eq!(x, 0); + + let x = LittleEndian::read_u16(&xs); + assert_eq!(x, 0); + let x = LittleEndian::read_u32(&xs); + assert_eq!(x, 0); + let x = LittleEndian::read_u64(&xs); + assert_eq!(x, 0); + let x = LittleEndian::read_u128(&xs); + assert_eq!(x, 0); + let x = LittleEndian::read_i16(&xs); + assert_eq!(x, 0); + let x = LittleEndian::read_i32(&xs); + assert_eq!(x, 0); + let x = LittleEndian::read_i64(&xs); + assert_eq!(x, 0); + let x = LittleEndian::read_i128(&xs); + assert_eq!(x, 0); + } +} + +#[cfg(test)] +#[cfg(feature = "std")] +mod stdtests { + extern crate quickcheck; + extern crate rand; + + use self::quickcheck::{QuickCheck, StdGen, Testable}; + use self::rand::thread_rng; + + fn qc_unsized<A: Testable>(f: A) { + QuickCheck::new() + .gen(StdGen::new(thread_rng(), 16)) + .tests(1_00) + .max_tests(10_000) + .quickcheck(f); + } + + macro_rules! calc_max { + ($max:expr, $bytes:expr) => { + ($max - 1) >> (8 * (8 - $bytes)) + }; + } + + macro_rules! qc_bytes_ext { + ($name:ident, $ty_int:ty, $max:expr, + $bytes:expr, $read:ident, $write:ident) => { + mod $name { + #[allow(unused_imports)] + use crate::test::{qc_sized, Wi128}; + use crate::{ + BigEndian, LittleEndian, NativeEndian, ReadBytesExt, + WriteBytesExt, + }; + use std::io::Cursor; + + #[test] + fn big_endian() { + fn prop(n: $ty_int) -> bool { + let mut wtr = vec![]; + wtr.$write::<BigEndian>(n.clone()).unwrap(); + let offset = wtr.len() - $bytes; + let mut rdr = Cursor::new(&mut wtr[offset..]); + n == rdr.$read::<BigEndian>($bytes).unwrap() + } + qc_sized(prop as fn($ty_int) -> bool, $max); + } + + #[test] + fn little_endian() { + fn prop(n: $ty_int) -> bool { + let mut wtr = vec![]; + wtr.$write::<LittleEndian>(n.clone()).unwrap(); + let mut rdr = Cursor::new(wtr); + n == rdr.$read::<LittleEndian>($bytes).unwrap() + } + qc_sized(prop as fn($ty_int) -> bool, $max); + } + + #[test] + fn native_endian() { + fn prop(n: $ty_int) -> bool { + let mut wtr = vec![]; + wtr.$write::<NativeEndian>(n.clone()).unwrap(); + let offset = if cfg!(target_endian = "big") { + wtr.len() - $bytes + } else { + 0 + }; + let mut rdr = Cursor::new(&mut wtr[offset..]); + n == rdr.$read::<NativeEndian>($bytes).unwrap() + } + qc_sized(prop as fn($ty_int) -> bool, $max); + } + } + }; + ($name:ident, $ty_int:ty, $max:expr, $read:ident, $write:ident) => { + mod $name { + #[allow(unused_imports)] + use crate::test::{qc_sized, Wi128}; + use crate::{ + BigEndian, LittleEndian, NativeEndian, ReadBytesExt, + WriteBytesExt, + }; + use std::io::Cursor; + + #[test] + fn big_endian() { + fn prop(n: $ty_int) -> bool { + let mut wtr = vec![]; + wtr.$write::<BigEndian>(n.clone()).unwrap(); + let mut rdr = Cursor::new(wtr); + n == rdr.$read::<BigEndian>().unwrap() + } + qc_sized(prop as fn($ty_int) -> bool, $max - 1); + } + + #[test] + fn little_endian() { + fn prop(n: $ty_int) -> bool { + let mut wtr = vec![]; + wtr.$write::<LittleEndian>(n.clone()).unwrap(); + let mut rdr = Cursor::new(wtr); + n == rdr.$read::<LittleEndian>().unwrap() + } + qc_sized(prop as fn($ty_int) -> bool, $max - 1); + } + + #[test] + fn native_endian() { + fn prop(n: $ty_int) -> bool { + let mut wtr = vec![]; + wtr.$write::<NativeEndian>(n.clone()).unwrap(); + let mut rdr = Cursor::new(wtr); + n == rdr.$read::<NativeEndian>().unwrap() + } + qc_sized(prop as fn($ty_int) -> bool, $max - 1); + } + } + }; + } + + qc_bytes_ext!( + prop_ext_u16, + u16, + ::std::u16::MAX as u64, + read_u16, + write_u16 + ); + qc_bytes_ext!( + prop_ext_i16, + i16, + ::std::i16::MAX as u64, + read_i16, + write_i16 + ); + qc_bytes_ext!( + prop_ext_u32, + u32, + ::std::u32::MAX as u64, + read_u32, + write_u32 + ); + qc_bytes_ext!( + prop_ext_i32, + i32, + ::std::i32::MAX as u64, + read_i32, + write_i32 + ); + qc_bytes_ext!( + prop_ext_u64, + u64, + ::std::u64::MAX as u64, + read_u64, + write_u64 + ); + qc_bytes_ext!( + prop_ext_i64, + i64, + ::std::i64::MAX as u64, + read_i64, + write_i64 + ); + qc_bytes_ext!( + prop_ext_f32, + f32, + ::std::u64::MAX as u64, + read_f32, + write_f32 + ); + qc_bytes_ext!( + prop_ext_f64, + f64, + ::std::i64::MAX as u64, + read_f64, + write_f64 + ); + + qc_bytes_ext!(prop_ext_u128, Wi128<u128>, 16 + 1, read_u128, write_u128); + qc_bytes_ext!(prop_ext_i128, Wi128<i128>, 16 + 1, read_i128, write_i128); + + qc_bytes_ext!( + prop_ext_uint_1, + u64, + calc_max!(crate::test::U64_MAX, 1), + 1, + read_uint, + write_u64 + ); + qc_bytes_ext!( + prop_ext_uint_2, + u64, + calc_max!(crate::test::U64_MAX, 2), + 2, + read_uint, + write_u64 + ); + qc_bytes_ext!( + prop_ext_uint_3, + u64, + calc_max!(crate::test::U64_MAX, 3), + 3, + read_uint, + write_u64 + ); + qc_bytes_ext!( + prop_ext_uint_4, + u64, + calc_max!(crate::test::U64_MAX, 4), + 4, + read_uint, + write_u64 + ); + qc_bytes_ext!( + prop_ext_uint_5, + u64, + calc_max!(crate::test::U64_MAX, 5), + 5, + read_uint, + write_u64 + ); + qc_bytes_ext!( + prop_ext_uint_6, + u64, + calc_max!(crate::test::U64_MAX, 6), + 6, + read_uint, + write_u64 + ); + qc_bytes_ext!( + prop_ext_uint_7, + u64, + calc_max!(crate::test::U64_MAX, 7), + 7, + read_uint, + write_u64 + ); + qc_bytes_ext!( + prop_ext_uint_8, + u64, + calc_max!(crate::test::U64_MAX, 8), + 8, + read_uint, + write_u64 + ); + + qc_bytes_ext!( + prop_ext_uint128_1, + Wi128<u128>, + 1, + 1, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_2, + Wi128<u128>, + 2, + 2, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_3, + Wi128<u128>, + 3, + 3, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_4, + Wi128<u128>, + 4, + 4, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_5, + Wi128<u128>, + 5, + 5, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_6, + Wi128<u128>, + 6, + 6, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_7, + Wi128<u128>, + 7, + 7, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_8, + Wi128<u128>, + 8, + 8, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_9, + Wi128<u128>, + 9, + 9, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_10, + Wi128<u128>, + 10, + 10, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_11, + Wi128<u128>, + 11, + 11, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_12, + Wi128<u128>, + 12, + 12, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_13, + Wi128<u128>, + 13, + 13, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_14, + Wi128<u128>, + 14, + 14, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_15, + Wi128<u128>, + 15, + 15, + read_uint128, + write_u128 + ); + qc_bytes_ext!( + prop_ext_uint128_16, + Wi128<u128>, + 16, + 16, + read_uint128, + write_u128 + ); + + qc_bytes_ext!( + prop_ext_int_1, + i64, + calc_max!(crate::test::I64_MAX, 1), + 1, + read_int, + write_i64 + ); + qc_bytes_ext!( + prop_ext_int_2, + i64, + calc_max!(crate::test::I64_MAX, 2), + 2, + read_int, + write_i64 + ); + qc_bytes_ext!( + prop_ext_int_3, + i64, + calc_max!(crate::test::I64_MAX, 3), + 3, + read_int, + write_i64 + ); + qc_bytes_ext!( + prop_ext_int_4, + i64, + calc_max!(crate::test::I64_MAX, 4), + 4, + read_int, + write_i64 + ); + qc_bytes_ext!( + prop_ext_int_5, + i64, + calc_max!(crate::test::I64_MAX, 5), + 5, + read_int, + write_i64 + ); + qc_bytes_ext!( + prop_ext_int_6, + i64, + calc_max!(crate::test::I64_MAX, 6), + 6, + read_int, + write_i64 + ); + qc_bytes_ext!( + prop_ext_int_7, + i64, + calc_max!(crate::test::I64_MAX, 1), + 7, + read_int, + write_i64 + ); + qc_bytes_ext!( + prop_ext_int_8, + i64, + calc_max!(crate::test::I64_MAX, 8), + 8, + read_int, + write_i64 + ); + + qc_bytes_ext!( + prop_ext_int128_1, + Wi128<i128>, + 1, + 1, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_2, + Wi128<i128>, + 2, + 2, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_3, + Wi128<i128>, + 3, + 3, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_4, + Wi128<i128>, + 4, + 4, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_5, + Wi128<i128>, + 5, + 5, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_6, + Wi128<i128>, + 6, + 6, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_7, + Wi128<i128>, + 7, + 7, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_8, + Wi128<i128>, + 8, + 8, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_9, + Wi128<i128>, + 9, + 9, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_10, + Wi128<i128>, + 10, + 10, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_11, + Wi128<i128>, + 11, + 11, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_12, + Wi128<i128>, + 12, + 12, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_13, + Wi128<i128>, + 13, + 13, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_14, + Wi128<i128>, + 14, + 14, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_15, + Wi128<i128>, + 15, + 15, + read_int128, + write_i128 + ); + qc_bytes_ext!( + prop_ext_int128_16, + Wi128<i128>, + 16, + 16, + read_int128, + write_i128 + ); + + // Test slice serialization/deserialization. + macro_rules! qc_slice { + ($name:ident, $ty_int:ty, $read:ident, $write:ident, $zero:expr) => { + mod $name { + use super::qc_unsized; + #[allow(unused_imports)] + use crate::test::Wi128; + use crate::{ + BigEndian, ByteOrder, LittleEndian, NativeEndian, + }; + use core::mem::size_of; + + #[test] + fn big_endian() { + #[allow(unused_unsafe)] + fn prop(numbers: Vec<$ty_int>) -> bool { + let numbers: Vec<_> = + numbers.into_iter().map(|x| x.clone()).collect(); + let num_bytes = size_of::<$ty_int>() * numbers.len(); + let mut bytes = vec![0; num_bytes]; + + BigEndian::$write(&numbers, &mut bytes); + + let mut got = vec![$zero; numbers.len()]; + unsafe { + BigEndian::$read(&bytes, &mut got); + } + + numbers == got + } + qc_unsized(prop as fn(_) -> bool); + } + + #[test] + fn little_endian() { + #[allow(unused_unsafe)] + fn prop(numbers: Vec<$ty_int>) -> bool { + let numbers: Vec<_> = + numbers.into_iter().map(|x| x.clone()).collect(); + let num_bytes = size_of::<$ty_int>() * numbers.len(); + let mut bytes = vec![0; num_bytes]; + + LittleEndian::$write(&numbers, &mut bytes); + + let mut got = vec![$zero; numbers.len()]; + unsafe { + LittleEndian::$read(&bytes, &mut got); + } + + numbers == got + } + qc_unsized(prop as fn(_) -> bool); + } + + #[test] + fn native_endian() { + #[allow(unused_unsafe)] + fn prop(numbers: Vec<$ty_int>) -> bool { + let numbers: Vec<_> = + numbers.into_iter().map(|x| x.clone()).collect(); + let num_bytes = size_of::<$ty_int>() * numbers.len(); + let mut bytes = vec![0; num_bytes]; + + NativeEndian::$write(&numbers, &mut bytes); + + let mut got = vec![$zero; numbers.len()]; + unsafe { + NativeEndian::$read(&bytes, &mut got); + } + + numbers == got + } + qc_unsized(prop as fn(_) -> bool); + } + } + }; + } + + qc_slice!(prop_slice_u16, u16, read_u16_into, write_u16_into, 0); + qc_slice!(prop_slice_i16, i16, read_i16_into, write_i16_into, 0); + qc_slice!(prop_slice_u32, u32, read_u32_into, write_u32_into, 0); + qc_slice!(prop_slice_i32, i32, read_i32_into, write_i32_into, 0); + qc_slice!(prop_slice_u64, u64, read_u64_into, write_u64_into, 0); + qc_slice!(prop_slice_i64, i64, read_i64_into, write_i64_into, 0); + qc_slice!( + prop_slice_u128, + Wi128<u128>, + read_u128_into, + write_u128_into, + 0 + ); + qc_slice!( + prop_slice_i128, + Wi128<i128>, + read_i128_into, + write_i128_into, + 0 + ); + + qc_slice!(prop_slice_f32, f32, read_f32_into, write_f32_into, 0.0); + qc_slice!(prop_slice_f64, f64, read_f64_into, write_f64_into, 0.0); +} |