From c44b5e364e7084cdbabf9f94b63a3c7f32b8fb68 Mon Sep 17 00:00:00 2001
From: Zoey Riordan <zoey@dos.cafe>
Date: Sat, 10 Apr 2021 12:56:36 +0200
Subject: [PATCH] remove byteorder as a dependency (#390)

* remove byteorder as a dependency

* fix module imports
---
 Cargo.toml           |   3 +-
 src/byteorder.rs     | 385 +++++++++++++++++++++++++++++++++++++++++++
 src/config/endian.rs |  10 +-
 src/lib.rs           |   4 +-
 tests/test.rs        |   1 -
 5 files changed, 392 insertions(+), 11 deletions(-)
 create mode 100644 src/byteorder.rs

diff --git a/Cargo.toml b/Cargo.toml
index 1627f4783..0fa360436 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bincode"
-version = "1.3.2" # remember to update html_root_url
+version = "1.3.3" # remember to update html_root_url
 authors = ["Ty Overby <ty@pre-alpha.com>", "Francesco Mazzoli <f@mazzo.li>", "David Tolnay <dtolnay@gmail.com>", "Zoey Riordan <zoey@dos.cafe>"]
 exclude = ["logo.png", "examples/*", ".gitignore", ".travis.yml"]
 
@@ -16,7 +16,6 @@ license = "MIT"
 description = "A binary serialization / deserialization strategy that uses Serde for transforming structs into bytes and vice versa!"
 
 [dependencies]
-byteorder = ">=1.3.0, < 1.4.0"
 serde = "1.0.63"
 
 [dev-dependencies]
diff --git a/src/byteorder.rs b/src/byteorder.rs
new file mode 100644
index 000000000..67fc4626c
--- /dev/null
+++ b/src/byteorder.rs
@@ -0,0 +1,385 @@
+// Copyright (c) 2015 Andrew Gallant
+
+use std::io;
+use std::io::Result;
+use std::ptr::copy_nonoverlapping;
+
+#[derive(Copy, Clone)]
+pub struct LittleEndian;
+
+#[derive(Copy, Clone)]
+pub struct BigEndian;
+
+#[cfg(target_endian = "little")]
+pub type NativeEndian = LittleEndian;
+
+#[cfg(target_endian = "big")]
+pub type NativeEndian = BigEndian;
+
+macro_rules! read_num_bytes {
+    ($ty:ty, $size:expr, $src:expr, $which:ident) => {{
+        assert!($size == ::std::mem::size_of::<$ty>());
+        assert!($size <= $src.len());
+        let mut data: $ty = 0;
+        unsafe {
+            copy_nonoverlapping($src.as_ptr(), &mut data as *mut $ty as *mut u8, $size);
+        }
+        data.$which()
+    }};
+}
+
+macro_rules! 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);
+        }
+    }};
+}
+
+impl ByteOrder for LittleEndian {
+    #[inline]
+    fn read_u16(buf: &[u8]) -> u16 {
+        read_num_bytes!(u16, 2, buf, to_le)
+    }
+
+    #[inline]
+    fn read_u32(buf: &[u8]) -> u32 {
+        read_num_bytes!(u32, 4, buf, to_le)
+    }
+
+    #[inline]
+    fn read_u64(buf: &[u8]) -> u64 {
+        read_num_bytes!(u64, 8, buf, to_le)
+    }
+
+    #[inline]
+    fn write_u16(buf: &mut [u8], n: u16) {
+        write_num_bytes!(u16, 2, n, buf, to_le);
+    }
+
+    #[inline]
+    fn write_u32(buf: &mut [u8], n: u32) {
+        write_num_bytes!(u32, 4, n, buf, to_le);
+    }
+
+    #[inline]
+    fn write_u64(buf: &mut [u8], n: u64) {
+        write_num_bytes!(u64, 8, n, buf, to_le);
+    }
+
+    serde_if_integer128! {
+        #[inline]
+        fn write_u128(buf: &mut [u8], n: u128) {
+            write_num_bytes!(u128, 16, n, buf, to_le);
+        }
+
+        #[inline]
+        fn read_u128(buf: &[u8]) -> u128 {
+            read_num_bytes!(u128, 16, buf, to_le)
+        }
+    }
+}
+
+impl ByteOrder for BigEndian {
+    #[inline]
+    fn read_u16(buf: &[u8]) -> u16 {
+        read_num_bytes!(u16, 2, buf, to_be)
+    }
+
+    #[inline]
+    fn read_u32(buf: &[u8]) -> u32 {
+        read_num_bytes!(u32, 4, buf, to_be)
+    }
+
+    #[inline]
+    fn read_u64(buf: &[u8]) -> u64 {
+        read_num_bytes!(u64, 8, buf, to_be)
+    }
+
+    #[inline]
+    fn write_u16(buf: &mut [u8], n: u16) {
+        write_num_bytes!(u16, 2, n, buf, to_be);
+    }
+
+    #[inline]
+    fn write_u32(buf: &mut [u8], n: u32) {
+        write_num_bytes!(u32, 4, n, buf, to_be);
+    }
+
+    #[inline]
+    fn write_u64(buf: &mut [u8], n: u64) {
+        write_num_bytes!(u64, 8, n, buf, to_be);
+    }
+
+    serde_if_integer128! {
+        #[inline]
+        fn write_u128(buf: &mut [u8], n: u128) {
+            write_num_bytes!(u128, 16, n, buf, to_be);
+        }
+
+        #[inline]
+        fn read_u128(buf: &[u8]) -> u128 {
+            read_num_bytes!(u128, 16, buf, to_be)
+        }
+    }
+}
+
+pub trait ByteOrder: Clone + Copy {
+    fn read_u16(buf: &[u8]) -> u16;
+
+    fn read_u32(buf: &[u8]) -> u32;
+
+    fn read_u64(buf: &[u8]) -> u64;
+
+    fn write_u16(buf: &mut [u8], n: u16);
+
+    fn write_u32(buf: &mut [u8], n: u32);
+
+    fn write_u64(buf: &mut [u8], n: u64);
+
+    #[inline]
+    fn read_i16(buf: &[u8]) -> i16 {
+        Self::read_u16(buf) as i16
+    }
+
+    #[inline]
+    fn read_i32(buf: &[u8]) -> i32 {
+        Self::read_u32(buf) as i32
+    }
+
+    #[inline]
+    fn read_i64(buf: &[u8]) -> i64 {
+        Self::read_u64(buf) as i64
+    }
+
+    #[inline]
+    fn read_f32(buf: &[u8]) -> f32 {
+        unsafe { *(&Self::read_u32(buf) as *const u32 as *const f32) }
+    }
+
+    #[inline]
+    fn read_f64(buf: &[u8]) -> f64 {
+        unsafe { *(&Self::read_u64(buf) as *const u64 as *const f64) }
+    }
+
+    #[inline]
+    fn write_i16(buf: &mut [u8], n: i16) {
+        Self::write_u16(buf, n as u16)
+    }
+
+    #[inline]
+    fn write_i32(buf: &mut [u8], n: i32) {
+        Self::write_u32(buf, n as u32)
+    }
+
+    #[inline]
+    fn write_i64(buf: &mut [u8], n: i64) {
+        Self::write_u64(buf, n as u64)
+    }
+
+    #[inline]
+    fn write_f32(buf: &mut [u8], n: f32) {
+        let n = unsafe { *(&n as *const f32 as *const u32) };
+        Self::write_u32(buf, n)
+    }
+
+    #[inline]
+    fn write_f64(buf: &mut [u8], n: f64) {
+        let n = unsafe { *(&n as *const f64 as *const u64) };
+        Self::write_u64(buf, n)
+    }
+
+    serde_if_integer128! {
+        fn read_u128(buf: &[u8]) -> u128;
+        fn write_u128(buf: &mut [u8], n: u128);
+
+        #[inline]
+        fn read_i128(buf: &[u8]) -> i128 {
+            Self::read_u128(buf) as i128
+        }
+
+        #[inline]
+        fn write_i128(buf: &mut [u8], n: i128) {
+            Self::write_u128(buf, n as u128)
+        }
+    }
+}
+
+pub trait ReadBytesExt: io::Read {
+    #[inline]
+    fn read_u8(&mut self) -> Result<u8> {
+        let mut buf = [0; 1];
+        try!(self.read_exact(&mut buf));
+        Ok(buf[0])
+    }
+
+    #[inline]
+    fn read_i8(&mut self) -> Result<i8> {
+        let mut buf = [0; 1];
+        try!(self.read_exact(&mut buf));
+        Ok(buf[0] as i8)
+    }
+
+    #[inline]
+    fn read_u16<T: ByteOrder>(&mut self) -> Result<u16> {
+        let mut buf = [0; 2];
+        try!(self.read_exact(&mut buf));
+        Ok(T::read_u16(&buf))
+    }
+
+    #[inline]
+    fn read_i16<T: ByteOrder>(&mut self) -> Result<i16> {
+        let mut buf = [0; 2];
+        try!(self.read_exact(&mut buf));
+        Ok(T::read_i16(&buf))
+    }
+
+    #[inline]
+    fn read_u32<T: ByteOrder>(&mut self) -> Result<u32> {
+        let mut buf = [0; 4];
+        try!(self.read_exact(&mut buf));
+        Ok(T::read_u32(&buf))
+    }
+
+    #[inline]
+    fn read_i32<T: ByteOrder>(&mut self) -> Result<i32> {
+        let mut buf = [0; 4];
+        try!(self.read_exact(&mut buf));
+        Ok(T::read_i32(&buf))
+    }
+
+    #[inline]
+    fn read_u64<T: ByteOrder>(&mut self) -> Result<u64> {
+        let mut buf = [0; 8];
+        try!(self.read_exact(&mut buf));
+        Ok(T::read_u64(&buf))
+    }
+
+    #[inline]
+    fn read_i64<T: ByteOrder>(&mut self) -> Result<i64> {
+        let mut buf = [0; 8];
+        try!(self.read_exact(&mut buf));
+        Ok(T::read_i64(&buf))
+    }
+
+    #[inline]
+    fn read_f32<T: ByteOrder>(&mut self) -> Result<f32> {
+        let mut buf = [0; 4];
+        try!(self.read_exact(&mut buf));
+        Ok(T::read_f32(&buf))
+    }
+
+    #[inline]
+    fn read_f64<T: ByteOrder>(&mut self) -> Result<f64> {
+        let mut buf = [0; 8];
+        try!(self.read_exact(&mut buf));
+        Ok(T::read_f64(&buf))
+    }
+
+    serde_if_integer128! {
+        #[inline]
+        fn read_u128<T: ByteOrder>(&mut self) -> Result<u128> {
+            let mut buf = [0; 16];
+            try!(self.read_exact(&mut buf));
+            Ok(T::read_u128(&buf))
+        }
+
+        #[inline]
+        fn read_i128<T: ByteOrder>(&mut self) -> Result<i128> {
+            let mut buf = [0; 16];
+            try!(self.read_exact(&mut buf));
+            Ok(T::read_i128(&buf))
+        }
+    }
+}
+
+impl<R: io::Read + ?Sized> ReadBytesExt for R {}
+
+pub trait WriteBytesExt: io::Write {
+    #[inline]
+    fn write_u8(&mut self, n: u8) -> Result<()> {
+        self.write_all(&[n])
+    }
+
+    #[inline]
+    fn write_i8(&mut self, n: i8) -> Result<()> {
+        self.write_all(&[n as u8])
+    }
+
+    #[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)
+    }
+
+    #[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)
+    }
+
+    #[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)
+    }
+
+    #[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)
+    }
+
+    #[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)
+    }
+
+    #[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)
+    }
+
+    #[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)
+    }
+
+    #[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)
+    }
+
+    serde_if_integer128! {
+        #[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)
+        }
+
+        #[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)
+        }
+    }
+}
+
+impl<W: io::Write + ?Sized> WriteBytesExt for W {}
diff --git a/src/config/endian.rs b/src/config/endian.rs
index 4d924bf0d..1493252be 100644
--- a/src/config/endian.rs
+++ b/src/config/endian.rs
@@ -1,7 +1,5 @@
-use byteorder::{self, ByteOrder};
-
 pub trait BincodeByteOrder {
-    type Endian: ByteOrder + 'static;
+    type Endian: ::byteorder::ByteOrder + 'static;
 }
 
 /// Little-endian byte ordering.
@@ -17,13 +15,13 @@ pub struct BigEndian;
 pub struct NativeEndian;
 
 impl BincodeByteOrder for LittleEndian {
-    type Endian = byteorder::LittleEndian;
+    type Endian = ::byteorder::LittleEndian;
 }
 
 impl BincodeByteOrder for BigEndian {
-    type Endian = byteorder::BigEndian;
+    type Endian = ::byteorder::BigEndian;
 }
 
 impl BincodeByteOrder for NativeEndian {
-    type Endian = byteorder::NativeEndian;
+    type Endian = ::byteorder::NativeEndian;
 }
diff --git a/src/lib.rs b/src/lib.rs
index c1e19bac6..773dee0d8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -24,12 +24,11 @@
 //! Support for `i128` and `u128` is automatically enabled on Rust toolchains
 //! greater than or equal to `1.26.0` and disabled for targets which do not support it
 
-#![doc(html_root_url = "https://docs.rs/bincode/1.3.2")]
+#![doc(html_root_url = "https://docs.rs/bincode/1.3.3")]
 #![crate_name = "bincode"]
 #![crate_type = "rlib"]
 #![crate_type = "dylib"]
 
-extern crate byteorder;
 #[macro_use]
 extern crate serde;
 
@@ -37,6 +36,7 @@ pub mod config;
 /// Deserialize bincode data to a Rust data structure.
 pub mod de;
 
+mod byteorder;
 mod error;
 mod internal;
 mod ser;
diff --git a/tests/test.rs b/tests/test.rs
index 82fba86c6..d0b147de5 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -2,7 +2,6 @@
 extern crate serde_derive;
 
 extern crate bincode;
-extern crate byteorder;
 #[macro_use]
 extern crate serde;
 extern crate serde_bytes;