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-rw-r--r--vendor/bytes/src/buf/buf_impl.rs1071
-rw-r--r--vendor/bytes/src/buf/buf_mut.rs1079
-rw-r--r--vendor/bytes/src/buf/chain.rs222
-rw-r--r--vendor/bytes/src/buf/iter.rs132
-rw-r--r--vendor/bytes/src/buf/limit.rs75
-rw-r--r--vendor/bytes/src/buf/mod.rs41
-rw-r--r--vendor/bytes/src/buf/reader.rs81
-rw-r--r--vendor/bytes/src/buf/take.rs147
-rw-r--r--vendor/bytes/src/buf/uninit_slice.rs176
-rw-r--r--vendor/bytes/src/buf/vec_deque.rs22
-rw-r--r--vendor/bytes/src/buf/writer.rs88
11 files changed, 3134 insertions, 0 deletions
diff --git a/vendor/bytes/src/buf/buf_impl.rs b/vendor/bytes/src/buf/buf_impl.rs
new file mode 100644
index 000000000..16ad8a7ee
--- /dev/null
+++ b/vendor/bytes/src/buf/buf_impl.rs
@@ -0,0 +1,1071 @@
+#[cfg(feature = "std")]
+use crate::buf::{reader, Reader};
+use crate::buf::{take, Chain, Take};
+
+use core::{cmp, mem, ptr};
+
+#[cfg(feature = "std")]
+use std::io::IoSlice;
+
+use alloc::boxed::Box;
+
+macro_rules! buf_get_impl {
+ ($this:ident, $typ:tt::$conv:tt) => {{
+ const SIZE: usize = mem::size_of::<$typ>();
+ // try to convert directly from the bytes
+ // this Option<ret> trick is to avoid keeping a borrow on self
+ // when advance() is called (mut borrow) and to call bytes() only once
+ let ret = $this
+ .chunk()
+ .get(..SIZE)
+ .map(|src| unsafe { $typ::$conv(*(src as *const _ as *const [_; SIZE])) });
+
+ if let Some(ret) = ret {
+ // if the direct conversion was possible, advance and return
+ $this.advance(SIZE);
+ return ret;
+ } else {
+ // if not we copy the bytes in a temp buffer then convert
+ let mut buf = [0; SIZE];
+ $this.copy_to_slice(&mut buf); // (do the advance)
+ return $typ::$conv(buf);
+ }
+ }};
+ (le => $this:ident, $typ:tt, $len_to_read:expr) => {{
+ debug_assert!(mem::size_of::<$typ>() >= $len_to_read);
+
+ // The same trick as above does not improve the best case speed.
+ // It seems to be linked to the way the method is optimised by the compiler
+ let mut buf = [0; (mem::size_of::<$typ>())];
+ $this.copy_to_slice(&mut buf[..($len_to_read)]);
+ return $typ::from_le_bytes(buf);
+ }};
+ (be => $this:ident, $typ:tt, $len_to_read:expr) => {{
+ debug_assert!(mem::size_of::<$typ>() >= $len_to_read);
+
+ let mut buf = [0; (mem::size_of::<$typ>())];
+ $this.copy_to_slice(&mut buf[mem::size_of::<$typ>() - ($len_to_read)..]);
+ return $typ::from_be_bytes(buf);
+ }};
+}
+
+/// Read bytes from a buffer.
+///
+/// A buffer stores bytes in memory such that read operations are infallible.
+/// The underlying storage may or may not be in contiguous memory. A `Buf` value
+/// is a cursor into the buffer. Reading from `Buf` advances the cursor
+/// position. It can be thought of as an efficient `Iterator` for collections of
+/// bytes.
+///
+/// The simplest `Buf` is a `&[u8]`.
+///
+/// ```
+/// use bytes::Buf;
+///
+/// let mut buf = &b"hello world"[..];
+///
+/// assert_eq!(b'h', buf.get_u8());
+/// assert_eq!(b'e', buf.get_u8());
+/// assert_eq!(b'l', buf.get_u8());
+///
+/// let mut rest = [0; 8];
+/// buf.copy_to_slice(&mut rest);
+///
+/// assert_eq!(&rest[..], &b"lo world"[..]);
+/// ```
+pub trait Buf {
+ /// Returns the number of bytes between the current position and the end of
+ /// the buffer.
+ ///
+ /// This value is greater than or equal to the length of the slice returned
+ /// by `chunk()`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"hello world"[..];
+ ///
+ /// assert_eq!(buf.remaining(), 11);
+ ///
+ /// buf.get_u8();
+ ///
+ /// assert_eq!(buf.remaining(), 10);
+ /// ```
+ ///
+ /// # Implementer notes
+ ///
+ /// Implementations of `remaining` should ensure that the return value does
+ /// not change unless a call is made to `advance` or any other function that
+ /// is documented to change the `Buf`'s current position.
+ fn remaining(&self) -> usize;
+
+ /// Returns a slice starting at the current position and of length between 0
+ /// and `Buf::remaining()`. Note that this *can* return shorter slice (this allows
+ /// non-continuous internal representation).
+ ///
+ /// This is a lower level function. Most operations are done with other
+ /// functions.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"hello world"[..];
+ ///
+ /// assert_eq!(buf.chunk(), &b"hello world"[..]);
+ ///
+ /// buf.advance(6);
+ ///
+ /// assert_eq!(buf.chunk(), &b"world"[..]);
+ /// ```
+ ///
+ /// # Implementer notes
+ ///
+ /// This function should never panic. Once the end of the buffer is reached,
+ /// i.e., `Buf::remaining` returns 0, calls to `chunk()` should return an
+ /// empty slice.
+ fn chunk(&self) -> &[u8];
+
+ /// Fills `dst` with potentially multiple slices starting at `self`'s
+ /// current position.
+ ///
+ /// If the `Buf` is backed by disjoint slices of bytes, `chunk_vectored` enables
+ /// fetching more than one slice at once. `dst` is a slice of `IoSlice`
+ /// references, enabling the slice to be directly used with [`writev`]
+ /// without any further conversion. The sum of the lengths of all the
+ /// buffers in `dst` will be less than or equal to `Buf::remaining()`.
+ ///
+ /// The entries in `dst` will be overwritten, but the data **contained** by
+ /// the slices **will not** be modified. If `chunk_vectored` does not fill every
+ /// entry in `dst`, then `dst` is guaranteed to contain all remaining slices
+ /// in `self.
+ ///
+ /// This is a lower level function. Most operations are done with other
+ /// functions.
+ ///
+ /// # Implementer notes
+ ///
+ /// This function should never panic. Once the end of the buffer is reached,
+ /// i.e., `Buf::remaining` returns 0, calls to `chunk_vectored` must return 0
+ /// without mutating `dst`.
+ ///
+ /// Implementations should also take care to properly handle being called
+ /// with `dst` being a zero length slice.
+ ///
+ /// [`writev`]: http://man7.org/linux/man-pages/man2/readv.2.html
+ #[cfg(feature = "std")]
+ fn chunks_vectored<'a>(&'a self, dst: &mut [IoSlice<'a>]) -> usize {
+ if dst.is_empty() {
+ return 0;
+ }
+
+ if self.has_remaining() {
+ dst[0] = IoSlice::new(self.chunk());
+ 1
+ } else {
+ 0
+ }
+ }
+
+ /// Advance the internal cursor of the Buf
+ ///
+ /// The next call to `chunk()` will return a slice starting `cnt` bytes
+ /// further into the underlying buffer.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"hello world"[..];
+ ///
+ /// assert_eq!(buf.chunk(), &b"hello world"[..]);
+ ///
+ /// buf.advance(6);
+ ///
+ /// assert_eq!(buf.chunk(), &b"world"[..]);
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function **may** panic if `cnt > self.remaining()`.
+ ///
+ /// # Implementer notes
+ ///
+ /// It is recommended for implementations of `advance` to panic if `cnt >
+ /// self.remaining()`. If the implementation does not panic, the call must
+ /// behave as if `cnt == self.remaining()`.
+ ///
+ /// A call with `cnt == 0` should never panic and be a no-op.
+ fn advance(&mut self, cnt: usize);
+
+ /// Returns true if there are any more bytes to consume
+ ///
+ /// This is equivalent to `self.remaining() != 0`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"a"[..];
+ ///
+ /// assert!(buf.has_remaining());
+ ///
+ /// buf.get_u8();
+ ///
+ /// assert!(!buf.has_remaining());
+ /// ```
+ fn has_remaining(&self) -> bool {
+ self.remaining() > 0
+ }
+
+ /// Copies bytes from `self` into `dst`.
+ ///
+ /// The cursor is advanced by the number of bytes copied. `self` must have
+ /// enough remaining bytes to fill `dst`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"hello world"[..];
+ /// let mut dst = [0; 5];
+ ///
+ /// buf.copy_to_slice(&mut dst);
+ /// assert_eq!(&b"hello"[..], &dst);
+ /// assert_eq!(6, buf.remaining());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if `self.remaining() < dst.len()`
+ fn copy_to_slice(&mut self, dst: &mut [u8]) {
+ let mut off = 0;
+
+ assert!(self.remaining() >= dst.len());
+
+ while off < dst.len() {
+ let cnt;
+
+ unsafe {
+ let src = self.chunk();
+ cnt = cmp::min(src.len(), dst.len() - off);
+
+ ptr::copy_nonoverlapping(src.as_ptr(), dst[off..].as_mut_ptr(), cnt);
+
+ off += cnt;
+ }
+
+ self.advance(cnt);
+ }
+ }
+
+ /// Gets an unsigned 8 bit integer from `self`.
+ ///
+ /// The current position is advanced by 1.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x08 hello"[..];
+ /// assert_eq!(8, buf.get_u8());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is no more remaining data in `self`.
+ fn get_u8(&mut self) -> u8 {
+ assert!(self.remaining() >= 1);
+ let ret = self.chunk()[0];
+ self.advance(1);
+ ret
+ }
+
+ /// Gets a signed 8 bit integer from `self`.
+ ///
+ /// The current position is advanced by 1.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x08 hello"[..];
+ /// assert_eq!(8, buf.get_i8());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is no more remaining data in `self`.
+ fn get_i8(&mut self) -> i8 {
+ assert!(self.remaining() >= 1);
+ let ret = self.chunk()[0] as i8;
+ self.advance(1);
+ ret
+ }
+
+ /// Gets an unsigned 16 bit integer from `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 2.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x08\x09 hello"[..];
+ /// assert_eq!(0x0809, buf.get_u16());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_u16(&mut self) -> u16 {
+ buf_get_impl!(self, u16::from_be_bytes);
+ }
+
+ /// Gets an unsigned 16 bit integer from `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 2.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x09\x08 hello"[..];
+ /// assert_eq!(0x0809, buf.get_u16_le());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_u16_le(&mut self) -> u16 {
+ buf_get_impl!(self, u16::from_le_bytes);
+ }
+
+ /// Gets a signed 16 bit integer from `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 2.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x08\x09 hello"[..];
+ /// assert_eq!(0x0809, buf.get_i16());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_i16(&mut self) -> i16 {
+ buf_get_impl!(self, i16::from_be_bytes);
+ }
+
+ /// Gets a signed 16 bit integer from `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 2.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x09\x08 hello"[..];
+ /// assert_eq!(0x0809, buf.get_i16_le());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_i16_le(&mut self) -> i16 {
+ buf_get_impl!(self, i16::from_le_bytes);
+ }
+
+ /// Gets an unsigned 32 bit integer from `self` in the big-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x08\x09\xA0\xA1 hello"[..];
+ /// assert_eq!(0x0809A0A1, buf.get_u32());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_u32(&mut self) -> u32 {
+ buf_get_impl!(self, u32::from_be_bytes);
+ }
+
+ /// Gets an unsigned 32 bit integer from `self` in the little-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\xA1\xA0\x09\x08 hello"[..];
+ /// assert_eq!(0x0809A0A1, buf.get_u32_le());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_u32_le(&mut self) -> u32 {
+ buf_get_impl!(self, u32::from_le_bytes);
+ }
+
+ /// Gets a signed 32 bit integer from `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x08\x09\xA0\xA1 hello"[..];
+ /// assert_eq!(0x0809A0A1, buf.get_i32());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_i32(&mut self) -> i32 {
+ buf_get_impl!(self, i32::from_be_bytes);
+ }
+
+ /// Gets a signed 32 bit integer from `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\xA1\xA0\x09\x08 hello"[..];
+ /// assert_eq!(0x0809A0A1, buf.get_i32_le());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_i32_le(&mut self) -> i32 {
+ buf_get_impl!(self, i32::from_le_bytes);
+ }
+
+ /// Gets an unsigned 64 bit integer from `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x01\x02\x03\x04\x05\x06\x07\x08 hello"[..];
+ /// assert_eq!(0x0102030405060708, buf.get_u64());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_u64(&mut self) -> u64 {
+ buf_get_impl!(self, u64::from_be_bytes);
+ }
+
+ /// Gets an unsigned 64 bit integer from `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x08\x07\x06\x05\x04\x03\x02\x01 hello"[..];
+ /// assert_eq!(0x0102030405060708, buf.get_u64_le());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_u64_le(&mut self) -> u64 {
+ buf_get_impl!(self, u64::from_le_bytes);
+ }
+
+ /// Gets a signed 64 bit integer from `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x01\x02\x03\x04\x05\x06\x07\x08 hello"[..];
+ /// assert_eq!(0x0102030405060708, buf.get_i64());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_i64(&mut self) -> i64 {
+ buf_get_impl!(self, i64::from_be_bytes);
+ }
+
+ /// Gets a signed 64 bit integer from `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x08\x07\x06\x05\x04\x03\x02\x01 hello"[..];
+ /// assert_eq!(0x0102030405060708, buf.get_i64_le());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_i64_le(&mut self) -> i64 {
+ buf_get_impl!(self, i64::from_le_bytes);
+ }
+
+ /// Gets an unsigned 128 bit integer from `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 16.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x01\x02\x03\x04\x05\x06\x07\x08\x09\x10\x11\x12\x13\x14\x15\x16 hello"[..];
+ /// assert_eq!(0x01020304050607080910111213141516, buf.get_u128());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_u128(&mut self) -> u128 {
+ buf_get_impl!(self, u128::from_be_bytes);
+ }
+
+ /// Gets an unsigned 128 bit integer from `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 16.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x16\x15\x14\x13\x12\x11\x10\x09\x08\x07\x06\x05\x04\x03\x02\x01 hello"[..];
+ /// assert_eq!(0x01020304050607080910111213141516, buf.get_u128_le());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_u128_le(&mut self) -> u128 {
+ buf_get_impl!(self, u128::from_le_bytes);
+ }
+
+ /// Gets a signed 128 bit integer from `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 16.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x01\x02\x03\x04\x05\x06\x07\x08\x09\x10\x11\x12\x13\x14\x15\x16 hello"[..];
+ /// assert_eq!(0x01020304050607080910111213141516, buf.get_i128());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_i128(&mut self) -> i128 {
+ buf_get_impl!(self, i128::from_be_bytes);
+ }
+
+ /// Gets a signed 128 bit integer from `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 16.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x16\x15\x14\x13\x12\x11\x10\x09\x08\x07\x06\x05\x04\x03\x02\x01 hello"[..];
+ /// assert_eq!(0x01020304050607080910111213141516, buf.get_i128_le());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_i128_le(&mut self) -> i128 {
+ buf_get_impl!(self, i128::from_le_bytes);
+ }
+
+ /// Gets an unsigned n-byte integer from `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by `nbytes`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x01\x02\x03 hello"[..];
+ /// assert_eq!(0x010203, buf.get_uint(3));
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_uint(&mut self, nbytes: usize) -> u64 {
+ buf_get_impl!(be => self, u64, nbytes);
+ }
+
+ /// Gets an unsigned n-byte integer from `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by `nbytes`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x03\x02\x01 hello"[..];
+ /// assert_eq!(0x010203, buf.get_uint_le(3));
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_uint_le(&mut self, nbytes: usize) -> u64 {
+ buf_get_impl!(le => self, u64, nbytes);
+ }
+
+ /// Gets a signed n-byte integer from `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by `nbytes`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x01\x02\x03 hello"[..];
+ /// assert_eq!(0x010203, buf.get_int(3));
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_int(&mut self, nbytes: usize) -> i64 {
+ buf_get_impl!(be => self, i64, nbytes);
+ }
+
+ /// Gets a signed n-byte integer from `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by `nbytes`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x03\x02\x01 hello"[..];
+ /// assert_eq!(0x010203, buf.get_int_le(3));
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_int_le(&mut self, nbytes: usize) -> i64 {
+ buf_get_impl!(le => self, i64, nbytes);
+ }
+
+ /// Gets an IEEE754 single-precision (4 bytes) floating point number from
+ /// `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x3F\x99\x99\x9A hello"[..];
+ /// assert_eq!(1.2f32, buf.get_f32());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_f32(&mut self) -> f32 {
+ f32::from_bits(Self::get_u32(self))
+ }
+
+ /// Gets an IEEE754 single-precision (4 bytes) floating point number from
+ /// `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x9A\x99\x99\x3F hello"[..];
+ /// assert_eq!(1.2f32, buf.get_f32_le());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_f32_le(&mut self) -> f32 {
+ f32::from_bits(Self::get_u32_le(self))
+ }
+
+ /// Gets an IEEE754 double-precision (8 bytes) floating point number from
+ /// `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x3F\xF3\x33\x33\x33\x33\x33\x33 hello"[..];
+ /// assert_eq!(1.2f64, buf.get_f64());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_f64(&mut self) -> f64 {
+ f64::from_bits(Self::get_u64(self))
+ }
+
+ /// Gets an IEEE754 double-precision (8 bytes) floating point number from
+ /// `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = &b"\x33\x33\x33\x33\x33\x33\xF3\x3F hello"[..];
+ /// assert_eq!(1.2f64, buf.get_f64_le());
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining data in `self`.
+ fn get_f64_le(&mut self) -> f64 {
+ f64::from_bits(Self::get_u64_le(self))
+ }
+
+ /// Consumes `len` bytes inside self and returns new instance of `Bytes`
+ /// with this data.
+ ///
+ /// This function may be optimized by the underlying type to avoid actual
+ /// copies. For example, `Bytes` implementation will do a shallow copy
+ /// (ref-count increment).
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let bytes = (&b"hello world"[..]).copy_to_bytes(5);
+ /// assert_eq!(&bytes[..], &b"hello"[..]);
+ /// ```
+ fn copy_to_bytes(&mut self, len: usize) -> crate::Bytes {
+ use super::BufMut;
+
+ assert!(len <= self.remaining(), "`len` greater than remaining");
+
+ let mut ret = crate::BytesMut::with_capacity(len);
+ ret.put(self.take(len));
+ ret.freeze()
+ }
+
+ /// Creates an adaptor which will read at most `limit` bytes from `self`.
+ ///
+ /// This function returns a new instance of `Buf` which will read at most
+ /// `limit` bytes.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::{Buf, BufMut};
+ ///
+ /// let mut buf = b"hello world"[..].take(5);
+ /// let mut dst = vec![];
+ ///
+ /// dst.put(&mut buf);
+ /// assert_eq!(dst, b"hello");
+ ///
+ /// let mut buf = buf.into_inner();
+ /// dst.clear();
+ /// dst.put(&mut buf);
+ /// assert_eq!(dst, b" world");
+ /// ```
+ fn take(self, limit: usize) -> Take<Self>
+ where
+ Self: Sized,
+ {
+ take::new(self, limit)
+ }
+
+ /// Creates an adaptor which will chain this buffer with another.
+ ///
+ /// The returned `Buf` instance will first consume all bytes from `self`.
+ /// Afterwards the output is equivalent to the output of next.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut chain = b"hello "[..].chain(&b"world"[..]);
+ ///
+ /// let full = chain.copy_to_bytes(11);
+ /// assert_eq!(full.chunk(), b"hello world");
+ /// ```
+ fn chain<U: Buf>(self, next: U) -> Chain<Self, U>
+ where
+ Self: Sized,
+ {
+ Chain::new(self, next)
+ }
+
+ /// Creates an adaptor which implements the `Read` trait for `self`.
+ ///
+ /// This function returns a new value which implements `Read` by adapting
+ /// the `Read` trait functions to the `Buf` trait functions. Given that
+ /// `Buf` operations are infallible, none of the `Read` functions will
+ /// return with `Err`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::{Bytes, Buf};
+ /// use std::io::Read;
+ ///
+ /// let buf = Bytes::from("hello world");
+ ///
+ /// let mut reader = buf.reader();
+ /// let mut dst = [0; 1024];
+ ///
+ /// let num = reader.read(&mut dst).unwrap();
+ ///
+ /// assert_eq!(11, num);
+ /// assert_eq!(&dst[..11], &b"hello world"[..]);
+ /// ```
+ #[cfg(feature = "std")]
+ fn reader(self) -> Reader<Self>
+ where
+ Self: Sized,
+ {
+ reader::new(self)
+ }
+}
+
+macro_rules! deref_forward_buf {
+ () => {
+ fn remaining(&self) -> usize {
+ (**self).remaining()
+ }
+
+ fn chunk(&self) -> &[u8] {
+ (**self).chunk()
+ }
+
+ #[cfg(feature = "std")]
+ fn chunks_vectored<'b>(&'b self, dst: &mut [IoSlice<'b>]) -> usize {
+ (**self).chunks_vectored(dst)
+ }
+
+ fn advance(&mut self, cnt: usize) {
+ (**self).advance(cnt)
+ }
+
+ fn has_remaining(&self) -> bool {
+ (**self).has_remaining()
+ }
+
+ fn copy_to_slice(&mut self, dst: &mut [u8]) {
+ (**self).copy_to_slice(dst)
+ }
+
+ fn get_u8(&mut self) -> u8 {
+ (**self).get_u8()
+ }
+
+ fn get_i8(&mut self) -> i8 {
+ (**self).get_i8()
+ }
+
+ fn get_u16(&mut self) -> u16 {
+ (**self).get_u16()
+ }
+
+ fn get_u16_le(&mut self) -> u16 {
+ (**self).get_u16_le()
+ }
+
+ fn get_i16(&mut self) -> i16 {
+ (**self).get_i16()
+ }
+
+ fn get_i16_le(&mut self) -> i16 {
+ (**self).get_i16_le()
+ }
+
+ fn get_u32(&mut self) -> u32 {
+ (**self).get_u32()
+ }
+
+ fn get_u32_le(&mut self) -> u32 {
+ (**self).get_u32_le()
+ }
+
+ fn get_i32(&mut self) -> i32 {
+ (**self).get_i32()
+ }
+
+ fn get_i32_le(&mut self) -> i32 {
+ (**self).get_i32_le()
+ }
+
+ fn get_u64(&mut self) -> u64 {
+ (**self).get_u64()
+ }
+
+ fn get_u64_le(&mut self) -> u64 {
+ (**self).get_u64_le()
+ }
+
+ fn get_i64(&mut self) -> i64 {
+ (**self).get_i64()
+ }
+
+ fn get_i64_le(&mut self) -> i64 {
+ (**self).get_i64_le()
+ }
+
+ fn get_uint(&mut self, nbytes: usize) -> u64 {
+ (**self).get_uint(nbytes)
+ }
+
+ fn get_uint_le(&mut self, nbytes: usize) -> u64 {
+ (**self).get_uint_le(nbytes)
+ }
+
+ fn get_int(&mut self, nbytes: usize) -> i64 {
+ (**self).get_int(nbytes)
+ }
+
+ fn get_int_le(&mut self, nbytes: usize) -> i64 {
+ (**self).get_int_le(nbytes)
+ }
+
+ fn copy_to_bytes(&mut self, len: usize) -> crate::Bytes {
+ (**self).copy_to_bytes(len)
+ }
+ };
+}
+
+impl<T: Buf + ?Sized> Buf for &mut T {
+ deref_forward_buf!();
+}
+
+impl<T: Buf + ?Sized> Buf for Box<T> {
+ deref_forward_buf!();
+}
+
+impl Buf for &[u8] {
+ #[inline]
+ fn remaining(&self) -> usize {
+ self.len()
+ }
+
+ #[inline]
+ fn chunk(&self) -> &[u8] {
+ self
+ }
+
+ #[inline]
+ fn advance(&mut self, cnt: usize) {
+ *self = &self[cnt..];
+ }
+}
+
+#[cfg(feature = "std")]
+impl<T: AsRef<[u8]>> Buf for std::io::Cursor<T> {
+ fn remaining(&self) -> usize {
+ let len = self.get_ref().as_ref().len();
+ let pos = self.position();
+
+ if pos >= len as u64 {
+ return 0;
+ }
+
+ len - pos as usize
+ }
+
+ fn chunk(&self) -> &[u8] {
+ let len = self.get_ref().as_ref().len();
+ let pos = self.position();
+
+ if pos >= len as u64 {
+ return &[];
+ }
+
+ &self.get_ref().as_ref()[pos as usize..]
+ }
+
+ fn advance(&mut self, cnt: usize) {
+ let pos = (self.position() as usize)
+ .checked_add(cnt)
+ .expect("overflow");
+
+ assert!(pos <= self.get_ref().as_ref().len());
+ self.set_position(pos as u64);
+ }
+}
+
+// The existence of this function makes the compiler catch if the Buf
+// trait is "object-safe" or not.
+fn _assert_trait_object(_b: &dyn Buf) {}
diff --git a/vendor/bytes/src/buf/buf_mut.rs b/vendor/bytes/src/buf/buf_mut.rs
new file mode 100644
index 000000000..f736727b4
--- /dev/null
+++ b/vendor/bytes/src/buf/buf_mut.rs
@@ -0,0 +1,1079 @@
+use crate::buf::{limit, Chain, Limit, UninitSlice};
+#[cfg(feature = "std")]
+use crate::buf::{writer, Writer};
+
+use core::{cmp, mem, ptr, usize};
+
+use alloc::{boxed::Box, vec::Vec};
+
+/// A trait for values that provide sequential write access to bytes.
+///
+/// Write bytes to a buffer
+///
+/// A buffer stores bytes in memory such that write operations are infallible.
+/// The underlying storage may or may not be in contiguous memory. A `BufMut`
+/// value is a cursor into the buffer. Writing to `BufMut` advances the cursor
+/// position.
+///
+/// The simplest `BufMut` is a `Vec<u8>`.
+///
+/// ```
+/// use bytes::BufMut;
+///
+/// let mut buf = vec![];
+///
+/// buf.put(&b"hello world"[..]);
+///
+/// assert_eq!(buf, b"hello world");
+/// ```
+pub unsafe trait BufMut {
+ /// Returns the number of bytes that can be written from the current
+ /// position until the end of the buffer is reached.
+ ///
+ /// This value is greater than or equal to the length of the slice returned
+ /// by `chunk_mut()`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut dst = [0; 10];
+ /// let mut buf = &mut dst[..];
+ ///
+ /// let original_remaining = buf.remaining_mut();
+ /// buf.put(&b"hello"[..]);
+ ///
+ /// assert_eq!(original_remaining - 5, buf.remaining_mut());
+ /// ```
+ ///
+ /// # Implementer notes
+ ///
+ /// Implementations of `remaining_mut` should ensure that the return value
+ /// does not change unless a call is made to `advance_mut` or any other
+ /// function that is documented to change the `BufMut`'s current position.
+ fn remaining_mut(&self) -> usize;
+
+ /// Advance the internal cursor of the BufMut
+ ///
+ /// The next call to `chunk_mut` will return a slice starting `cnt` bytes
+ /// further into the underlying buffer.
+ ///
+ /// This function is unsafe because there is no guarantee that the bytes
+ /// being advanced past have been initialized.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = Vec::with_capacity(16);
+ ///
+ /// // Write some data
+ /// buf.chunk_mut()[0..2].copy_from_slice(b"he");
+ /// unsafe { buf.advance_mut(2) };
+ ///
+ /// // write more bytes
+ /// buf.chunk_mut()[0..3].copy_from_slice(b"llo");
+ ///
+ /// unsafe { buf.advance_mut(3); }
+ ///
+ /// assert_eq!(5, buf.len());
+ /// assert_eq!(buf, b"hello");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function **may** panic if `cnt > self.remaining_mut()`.
+ ///
+ /// # Implementer notes
+ ///
+ /// It is recommended for implementations of `advance_mut` to panic if
+ /// `cnt > self.remaining_mut()`. If the implementation does not panic,
+ /// the call must behave as if `cnt == self.remaining_mut()`.
+ ///
+ /// A call with `cnt == 0` should never panic and be a no-op.
+ unsafe fn advance_mut(&mut self, cnt: usize);
+
+ /// Returns true if there is space in `self` for more bytes.
+ ///
+ /// This is equivalent to `self.remaining_mut() != 0`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut dst = [0; 5];
+ /// let mut buf = &mut dst[..];
+ ///
+ /// assert!(buf.has_remaining_mut());
+ ///
+ /// buf.put(&b"hello"[..]);
+ ///
+ /// assert!(!buf.has_remaining_mut());
+ /// ```
+ fn has_remaining_mut(&self) -> bool {
+ self.remaining_mut() > 0
+ }
+
+ /// Returns a mutable slice starting at the current BufMut position and of
+ /// length between 0 and `BufMut::remaining_mut()`. Note that this *can* be shorter than the
+ /// whole remainder of the buffer (this allows non-continuous implementation).
+ ///
+ /// This is a lower level function. Most operations are done with other
+ /// functions.
+ ///
+ /// The returned byte slice may represent uninitialized memory.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = Vec::with_capacity(16);
+ ///
+ /// unsafe {
+ /// // MaybeUninit::as_mut_ptr
+ /// buf.chunk_mut()[0..].as_mut_ptr().write(b'h');
+ /// buf.chunk_mut()[1..].as_mut_ptr().write(b'e');
+ ///
+ /// buf.advance_mut(2);
+ ///
+ /// buf.chunk_mut()[0..].as_mut_ptr().write(b'l');
+ /// buf.chunk_mut()[1..].as_mut_ptr().write(b'l');
+ /// buf.chunk_mut()[2..].as_mut_ptr().write(b'o');
+ ///
+ /// buf.advance_mut(3);
+ /// }
+ ///
+ /// assert_eq!(5, buf.len());
+ /// assert_eq!(buf, b"hello");
+ /// ```
+ ///
+ /// # Implementer notes
+ ///
+ /// This function should never panic. `chunk_mut` should return an empty
+ /// slice **if and only if** `remaining_mut()` returns 0. In other words,
+ /// `chunk_mut()` returning an empty slice implies that `remaining_mut()` will
+ /// return 0 and `remaining_mut()` returning 0 implies that `chunk_mut()` will
+ /// return an empty slice.
+ fn chunk_mut(&mut self) -> &mut UninitSlice;
+
+ /// Transfer bytes into `self` from `src` and advance the cursor by the
+ /// number of bytes written.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ ///
+ /// buf.put_u8(b'h');
+ /// buf.put(&b"ello"[..]);
+ /// buf.put(&b" world"[..]);
+ ///
+ /// assert_eq!(buf, b"hello world");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// Panics if `self` does not have enough capacity to contain `src`.
+ fn put<T: super::Buf>(&mut self, mut src: T)
+ where
+ Self: Sized,
+ {
+ assert!(self.remaining_mut() >= src.remaining());
+
+ while src.has_remaining() {
+ let l;
+
+ unsafe {
+ let s = src.chunk();
+ let d = self.chunk_mut();
+ l = cmp::min(s.len(), d.len());
+
+ ptr::copy_nonoverlapping(s.as_ptr(), d.as_mut_ptr() as *mut u8, l);
+ }
+
+ src.advance(l);
+ unsafe {
+ self.advance_mut(l);
+ }
+ }
+ }
+
+ /// Transfer bytes into `self` from `src` and advance the cursor by the
+ /// number of bytes written.
+ ///
+ /// `self` must have enough remaining capacity to contain all of `src`.
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut dst = [0; 6];
+ ///
+ /// {
+ /// let mut buf = &mut dst[..];
+ /// buf.put_slice(b"hello");
+ ///
+ /// assert_eq!(1, buf.remaining_mut());
+ /// }
+ ///
+ /// assert_eq!(b"hello\0", &dst);
+ /// ```
+ fn put_slice(&mut self, src: &[u8]) {
+ let mut off = 0;
+
+ assert!(
+ self.remaining_mut() >= src.len(),
+ "buffer overflow; remaining = {}; src = {}",
+ self.remaining_mut(),
+ src.len()
+ );
+
+ while off < src.len() {
+ let cnt;
+
+ unsafe {
+ let dst = self.chunk_mut();
+ cnt = cmp::min(dst.len(), src.len() - off);
+
+ ptr::copy_nonoverlapping(src[off..].as_ptr(), dst.as_mut_ptr() as *mut u8, cnt);
+
+ off += cnt;
+ }
+
+ unsafe {
+ self.advance_mut(cnt);
+ }
+ }
+ }
+
+ /// Writes an unsigned 8 bit integer to `self`.
+ ///
+ /// The current position is advanced by 1.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_u8(0x01);
+ /// assert_eq!(buf, b"\x01");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_u8(&mut self, n: u8) {
+ let src = [n];
+ self.put_slice(&src);
+ }
+
+ /// Writes a signed 8 bit integer to `self`.
+ ///
+ /// The current position is advanced by 1.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_i8(0x01);
+ /// assert_eq!(buf, b"\x01");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_i8(&mut self, n: i8) {
+ let src = [n as u8];
+ self.put_slice(&src)
+ }
+
+ /// Writes an unsigned 16 bit integer to `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 2.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_u16(0x0809);
+ /// assert_eq!(buf, b"\x08\x09");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_u16(&mut self, n: u16) {
+ self.put_slice(&n.to_be_bytes())
+ }
+
+ /// Writes an unsigned 16 bit integer to `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 2.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_u16_le(0x0809);
+ /// assert_eq!(buf, b"\x09\x08");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_u16_le(&mut self, n: u16) {
+ self.put_slice(&n.to_le_bytes())
+ }
+
+ /// Writes a signed 16 bit integer to `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 2.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_i16(0x0809);
+ /// assert_eq!(buf, b"\x08\x09");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_i16(&mut self, n: i16) {
+ self.put_slice(&n.to_be_bytes())
+ }
+
+ /// Writes a signed 16 bit integer to `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 2.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_i16_le(0x0809);
+ /// assert_eq!(buf, b"\x09\x08");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_i16_le(&mut self, n: i16) {
+ self.put_slice(&n.to_le_bytes())
+ }
+
+ /// Writes an unsigned 32 bit integer to `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_u32(0x0809A0A1);
+ /// assert_eq!(buf, b"\x08\x09\xA0\xA1");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_u32(&mut self, n: u32) {
+ self.put_slice(&n.to_be_bytes())
+ }
+
+ /// Writes an unsigned 32 bit integer to `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_u32_le(0x0809A0A1);
+ /// assert_eq!(buf, b"\xA1\xA0\x09\x08");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_u32_le(&mut self, n: u32) {
+ self.put_slice(&n.to_le_bytes())
+ }
+
+ /// Writes a signed 32 bit integer to `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_i32(0x0809A0A1);
+ /// assert_eq!(buf, b"\x08\x09\xA0\xA1");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_i32(&mut self, n: i32) {
+ self.put_slice(&n.to_be_bytes())
+ }
+
+ /// Writes a signed 32 bit integer to `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_i32_le(0x0809A0A1);
+ /// assert_eq!(buf, b"\xA1\xA0\x09\x08");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_i32_le(&mut self, n: i32) {
+ self.put_slice(&n.to_le_bytes())
+ }
+
+ /// Writes an unsigned 64 bit integer to `self` in the big-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_u64(0x0102030405060708);
+ /// assert_eq!(buf, b"\x01\x02\x03\x04\x05\x06\x07\x08");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_u64(&mut self, n: u64) {
+ self.put_slice(&n.to_be_bytes())
+ }
+
+ /// Writes an unsigned 64 bit integer to `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_u64_le(0x0102030405060708);
+ /// assert_eq!(buf, b"\x08\x07\x06\x05\x04\x03\x02\x01");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_u64_le(&mut self, n: u64) {
+ self.put_slice(&n.to_le_bytes())
+ }
+
+ /// Writes a signed 64 bit integer to `self` in the big-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_i64(0x0102030405060708);
+ /// assert_eq!(buf, b"\x01\x02\x03\x04\x05\x06\x07\x08");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_i64(&mut self, n: i64) {
+ self.put_slice(&n.to_be_bytes())
+ }
+
+ /// Writes a signed 64 bit integer to `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_i64_le(0x0102030405060708);
+ /// assert_eq!(buf, b"\x08\x07\x06\x05\x04\x03\x02\x01");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_i64_le(&mut self, n: i64) {
+ self.put_slice(&n.to_le_bytes())
+ }
+
+ /// Writes an unsigned 128 bit integer to `self` in the big-endian byte order.
+ ///
+ /// The current position is advanced by 16.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_u128(0x01020304050607080910111213141516);
+ /// assert_eq!(buf, b"\x01\x02\x03\x04\x05\x06\x07\x08\x09\x10\x11\x12\x13\x14\x15\x16");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_u128(&mut self, n: u128) {
+ self.put_slice(&n.to_be_bytes())
+ }
+
+ /// Writes an unsigned 128 bit integer to `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 16.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_u128_le(0x01020304050607080910111213141516);
+ /// assert_eq!(buf, b"\x16\x15\x14\x13\x12\x11\x10\x09\x08\x07\x06\x05\x04\x03\x02\x01");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_u128_le(&mut self, n: u128) {
+ self.put_slice(&n.to_le_bytes())
+ }
+
+ /// Writes a signed 128 bit integer to `self` in the big-endian byte order.
+ ///
+ /// The current position is advanced by 16.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_i128(0x01020304050607080910111213141516);
+ /// assert_eq!(buf, b"\x01\x02\x03\x04\x05\x06\x07\x08\x09\x10\x11\x12\x13\x14\x15\x16");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_i128(&mut self, n: i128) {
+ self.put_slice(&n.to_be_bytes())
+ }
+
+ /// Writes a signed 128 bit integer to `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 16.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_i128_le(0x01020304050607080910111213141516);
+ /// assert_eq!(buf, b"\x16\x15\x14\x13\x12\x11\x10\x09\x08\x07\x06\x05\x04\x03\x02\x01");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_i128_le(&mut self, n: i128) {
+ self.put_slice(&n.to_le_bytes())
+ }
+
+ /// Writes an unsigned n-byte integer to `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by `nbytes`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_uint(0x010203, 3);
+ /// assert_eq!(buf, b"\x01\x02\x03");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_uint(&mut self, n: u64, nbytes: usize) {
+ self.put_slice(&n.to_be_bytes()[mem::size_of_val(&n) - nbytes..]);
+ }
+
+ /// Writes an unsigned n-byte integer to `self` in the little-endian byte order.
+ ///
+ /// The current position is advanced by `nbytes`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_uint_le(0x010203, 3);
+ /// assert_eq!(buf, b"\x03\x02\x01");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_uint_le(&mut self, n: u64, nbytes: usize) {
+ self.put_slice(&n.to_le_bytes()[0..nbytes]);
+ }
+
+ /// Writes a signed n-byte integer to `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by `nbytes`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_int(0x010203, 3);
+ /// assert_eq!(buf, b"\x01\x02\x03");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_int(&mut self, n: i64, nbytes: usize) {
+ self.put_slice(&n.to_be_bytes()[mem::size_of_val(&n) - nbytes..]);
+ }
+
+ /// Writes a signed n-byte integer to `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by `nbytes`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_int_le(0x010203, 3);
+ /// assert_eq!(buf, b"\x03\x02\x01");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_int_le(&mut self, n: i64, nbytes: usize) {
+ self.put_slice(&n.to_le_bytes()[0..nbytes]);
+ }
+
+ /// Writes an IEEE754 single-precision (4 bytes) floating point number to
+ /// `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_f32(1.2f32);
+ /// assert_eq!(buf, b"\x3F\x99\x99\x9A");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_f32(&mut self, n: f32) {
+ self.put_u32(n.to_bits());
+ }
+
+ /// Writes an IEEE754 single-precision (4 bytes) floating point number to
+ /// `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 4.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_f32_le(1.2f32);
+ /// assert_eq!(buf, b"\x9A\x99\x99\x3F");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_f32_le(&mut self, n: f32) {
+ self.put_u32_le(n.to_bits());
+ }
+
+ /// Writes an IEEE754 double-precision (8 bytes) floating point number to
+ /// `self` in big-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_f64(1.2f64);
+ /// assert_eq!(buf, b"\x3F\xF3\x33\x33\x33\x33\x33\x33");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_f64(&mut self, n: f64) {
+ self.put_u64(n.to_bits());
+ }
+
+ /// Writes an IEEE754 double-precision (8 bytes) floating point number to
+ /// `self` in little-endian byte order.
+ ///
+ /// The current position is advanced by 8.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![];
+ /// buf.put_f64_le(1.2f64);
+ /// assert_eq!(buf, b"\x33\x33\x33\x33\x33\x33\xF3\x3F");
+ /// ```
+ ///
+ /// # Panics
+ ///
+ /// This function panics if there is not enough remaining capacity in
+ /// `self`.
+ fn put_f64_le(&mut self, n: f64) {
+ self.put_u64_le(n.to_bits());
+ }
+
+ /// Creates an adaptor which can write at most `limit` bytes to `self`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let arr = &mut [0u8; 128][..];
+ /// assert_eq!(arr.remaining_mut(), 128);
+ ///
+ /// let dst = arr.limit(10);
+ /// assert_eq!(dst.remaining_mut(), 10);
+ /// ```
+ fn limit(self, limit: usize) -> Limit<Self>
+ where
+ Self: Sized,
+ {
+ limit::new(self, limit)
+ }
+
+ /// Creates an adaptor which implements the `Write` trait for `self`.
+ ///
+ /// This function returns a new value which implements `Write` by adapting
+ /// the `Write` trait functions to the `BufMut` trait functions. Given that
+ /// `BufMut` operations are infallible, none of the `Write` functions will
+ /// return with `Err`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ /// use std::io::Write;
+ ///
+ /// let mut buf = vec![].writer();
+ ///
+ /// let num = buf.write(&b"hello world"[..]).unwrap();
+ /// assert_eq!(11, num);
+ ///
+ /// let buf = buf.into_inner();
+ ///
+ /// assert_eq!(*buf, b"hello world"[..]);
+ /// ```
+ #[cfg(feature = "std")]
+ fn writer(self) -> Writer<Self>
+ where
+ Self: Sized,
+ {
+ writer::new(self)
+ }
+
+ /// Creates an adapter which will chain this buffer with another.
+ ///
+ /// The returned `BufMut` instance will first write to all bytes from
+ /// `self`. Afterwards, it will write to `next`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut a = [0u8; 5];
+ /// let mut b = [0u8; 6];
+ ///
+ /// let mut chain = (&mut a[..]).chain_mut(&mut b[..]);
+ ///
+ /// chain.put_slice(b"hello world");
+ ///
+ /// assert_eq!(&a[..], b"hello");
+ /// assert_eq!(&b[..], b" world");
+ /// ```
+ fn chain_mut<U: BufMut>(self, next: U) -> Chain<Self, U>
+ where
+ Self: Sized,
+ {
+ Chain::new(self, next)
+ }
+}
+
+macro_rules! deref_forward_bufmut {
+ () => {
+ fn remaining_mut(&self) -> usize {
+ (**self).remaining_mut()
+ }
+
+ fn chunk_mut(&mut self) -> &mut UninitSlice {
+ (**self).chunk_mut()
+ }
+
+ unsafe fn advance_mut(&mut self, cnt: usize) {
+ (**self).advance_mut(cnt)
+ }
+
+ fn put_slice(&mut self, src: &[u8]) {
+ (**self).put_slice(src)
+ }
+
+ fn put_u8(&mut self, n: u8) {
+ (**self).put_u8(n)
+ }
+
+ fn put_i8(&mut self, n: i8) {
+ (**self).put_i8(n)
+ }
+
+ fn put_u16(&mut self, n: u16) {
+ (**self).put_u16(n)
+ }
+
+ fn put_u16_le(&mut self, n: u16) {
+ (**self).put_u16_le(n)
+ }
+
+ fn put_i16(&mut self, n: i16) {
+ (**self).put_i16(n)
+ }
+
+ fn put_i16_le(&mut self, n: i16) {
+ (**self).put_i16_le(n)
+ }
+
+ fn put_u32(&mut self, n: u32) {
+ (**self).put_u32(n)
+ }
+
+ fn put_u32_le(&mut self, n: u32) {
+ (**self).put_u32_le(n)
+ }
+
+ fn put_i32(&mut self, n: i32) {
+ (**self).put_i32(n)
+ }
+
+ fn put_i32_le(&mut self, n: i32) {
+ (**self).put_i32_le(n)
+ }
+
+ fn put_u64(&mut self, n: u64) {
+ (**self).put_u64(n)
+ }
+
+ fn put_u64_le(&mut self, n: u64) {
+ (**self).put_u64_le(n)
+ }
+
+ fn put_i64(&mut self, n: i64) {
+ (**self).put_i64(n)
+ }
+
+ fn put_i64_le(&mut self, n: i64) {
+ (**self).put_i64_le(n)
+ }
+ };
+}
+
+unsafe impl<T: BufMut + ?Sized> BufMut for &mut T {
+ deref_forward_bufmut!();
+}
+
+unsafe impl<T: BufMut + ?Sized> BufMut for Box<T> {
+ deref_forward_bufmut!();
+}
+
+unsafe impl BufMut for &mut [u8] {
+ #[inline]
+ fn remaining_mut(&self) -> usize {
+ self.len()
+ }
+
+ #[inline]
+ fn chunk_mut(&mut self) -> &mut UninitSlice {
+ // UninitSlice is repr(transparent), so safe to transmute
+ unsafe { &mut *(*self as *mut [u8] as *mut _) }
+ }
+
+ #[inline]
+ unsafe fn advance_mut(&mut self, cnt: usize) {
+ // Lifetime dance taken from `impl Write for &mut [u8]`.
+ let (_, b) = core::mem::replace(self, &mut []).split_at_mut(cnt);
+ *self = b;
+ }
+}
+
+unsafe impl BufMut for Vec<u8> {
+ #[inline]
+ fn remaining_mut(&self) -> usize {
+ usize::MAX - self.len()
+ }
+
+ #[inline]
+ unsafe fn advance_mut(&mut self, cnt: usize) {
+ let len = self.len();
+ let remaining = self.capacity() - len;
+
+ assert!(
+ cnt <= remaining,
+ "cannot advance past `remaining_mut`: {:?} <= {:?}",
+ cnt,
+ remaining
+ );
+
+ self.set_len(len + cnt);
+ }
+
+ #[inline]
+ fn chunk_mut(&mut self) -> &mut UninitSlice {
+ if self.capacity() == self.len() {
+ self.reserve(64); // Grow the vec
+ }
+
+ let cap = self.capacity();
+ let len = self.len();
+
+ let ptr = self.as_mut_ptr();
+ unsafe { &mut UninitSlice::from_raw_parts_mut(ptr, cap)[len..] }
+ }
+
+ // Specialize these methods so they can skip checking `remaining_mut`
+ // and `advance_mut`.
+ fn put<T: super::Buf>(&mut self, mut src: T)
+ where
+ Self: Sized,
+ {
+ // In case the src isn't contiguous, reserve upfront
+ self.reserve(src.remaining());
+
+ while src.has_remaining() {
+ let l;
+
+ // a block to contain the src.bytes() borrow
+ {
+ let s = src.chunk();
+ l = s.len();
+ self.extend_from_slice(s);
+ }
+
+ src.advance(l);
+ }
+ }
+
+ #[inline]
+ fn put_slice(&mut self, src: &[u8]) {
+ self.extend_from_slice(src);
+ }
+}
+
+// The existence of this function makes the compiler catch if the BufMut
+// trait is "object-safe" or not.
+fn _assert_trait_object(_b: &dyn BufMut) {}
diff --git a/vendor/bytes/src/buf/chain.rs b/vendor/bytes/src/buf/chain.rs
new file mode 100644
index 000000000..d68bc2d0e
--- /dev/null
+++ b/vendor/bytes/src/buf/chain.rs
@@ -0,0 +1,222 @@
+use crate::buf::{IntoIter, UninitSlice};
+use crate::{Buf, BufMut};
+
+#[cfg(feature = "std")]
+use std::io::IoSlice;
+
+/// A `Chain` sequences two buffers.
+///
+/// `Chain` is an adapter that links two underlying buffers and provides a
+/// continuous view across both buffers. It is able to sequence either immutable
+/// buffers ([`Buf`] values) or mutable buffers ([`BufMut`] values).
+///
+/// This struct is generally created by calling [`Buf::chain`]. Please see that
+/// function's documentation for more detail.
+///
+/// # Examples
+///
+/// ```
+/// use bytes::{Bytes, Buf};
+///
+/// let mut buf = (&b"hello "[..])
+/// .chain(&b"world"[..]);
+///
+/// let full: Bytes = buf.copy_to_bytes(11);
+/// assert_eq!(full[..], b"hello world"[..]);
+/// ```
+///
+/// [`Buf::chain`]: trait.Buf.html#method.chain
+/// [`Buf`]: trait.Buf.html
+/// [`BufMut`]: trait.BufMut.html
+#[derive(Debug)]
+pub struct Chain<T, U> {
+ a: T,
+ b: U,
+}
+
+impl<T, U> Chain<T, U> {
+ /// Creates a new `Chain` sequencing the provided values.
+ pub(crate) fn new(a: T, b: U) -> Chain<T, U> {
+ Chain { a, b }
+ }
+
+ /// Gets a reference to the first underlying `Buf`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let buf = (&b"hello"[..])
+ /// .chain(&b"world"[..]);
+ ///
+ /// assert_eq!(buf.first_ref()[..], b"hello"[..]);
+ /// ```
+ pub fn first_ref(&self) -> &T {
+ &self.a
+ }
+
+ /// Gets a mutable reference to the first underlying `Buf`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = (&b"hello"[..])
+ /// .chain(&b"world"[..]);
+ ///
+ /// buf.first_mut().advance(1);
+ ///
+ /// let full = buf.copy_to_bytes(9);
+ /// assert_eq!(full, b"elloworld"[..]);
+ /// ```
+ pub fn first_mut(&mut self) -> &mut T {
+ &mut self.a
+ }
+
+ /// Gets a reference to the last underlying `Buf`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let buf = (&b"hello"[..])
+ /// .chain(&b"world"[..]);
+ ///
+ /// assert_eq!(buf.last_ref()[..], b"world"[..]);
+ /// ```
+ pub fn last_ref(&self) -> &U {
+ &self.b
+ }
+
+ /// Gets a mutable reference to the last underlying `Buf`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = (&b"hello "[..])
+ /// .chain(&b"world"[..]);
+ ///
+ /// buf.last_mut().advance(1);
+ ///
+ /// let full = buf.copy_to_bytes(10);
+ /// assert_eq!(full, b"hello orld"[..]);
+ /// ```
+ pub fn last_mut(&mut self) -> &mut U {
+ &mut self.b
+ }
+
+ /// Consumes this `Chain`, returning the underlying values.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Buf;
+ ///
+ /// let chain = (&b"hello"[..])
+ /// .chain(&b"world"[..]);
+ ///
+ /// let (first, last) = chain.into_inner();
+ /// assert_eq!(first[..], b"hello"[..]);
+ /// assert_eq!(last[..], b"world"[..]);
+ /// ```
+ pub fn into_inner(self) -> (T, U) {
+ (self.a, self.b)
+ }
+}
+
+impl<T, U> Buf for Chain<T, U>
+where
+ T: Buf,
+ U: Buf,
+{
+ fn remaining(&self) -> usize {
+ self.a.remaining() + self.b.remaining()
+ }
+
+ fn chunk(&self) -> &[u8] {
+ if self.a.has_remaining() {
+ self.a.chunk()
+ } else {
+ self.b.chunk()
+ }
+ }
+
+ fn advance(&mut self, mut cnt: usize) {
+ let a_rem = self.a.remaining();
+
+ if a_rem != 0 {
+ if a_rem >= cnt {
+ self.a.advance(cnt);
+ return;
+ }
+
+ // Consume what is left of a
+ self.a.advance(a_rem);
+
+ cnt -= a_rem;
+ }
+
+ self.b.advance(cnt);
+ }
+
+ #[cfg(feature = "std")]
+ fn chunks_vectored<'a>(&'a self, dst: &mut [IoSlice<'a>]) -> usize {
+ let mut n = self.a.chunks_vectored(dst);
+ n += self.b.chunks_vectored(&mut dst[n..]);
+ n
+ }
+}
+
+unsafe impl<T, U> BufMut for Chain<T, U>
+where
+ T: BufMut,
+ U: BufMut,
+{
+ fn remaining_mut(&self) -> usize {
+ self.a.remaining_mut() + self.b.remaining_mut()
+ }
+
+ fn chunk_mut(&mut self) -> &mut UninitSlice {
+ if self.a.has_remaining_mut() {
+ self.a.chunk_mut()
+ } else {
+ self.b.chunk_mut()
+ }
+ }
+
+ unsafe fn advance_mut(&mut self, mut cnt: usize) {
+ let a_rem = self.a.remaining_mut();
+
+ if a_rem != 0 {
+ if a_rem >= cnt {
+ self.a.advance_mut(cnt);
+ return;
+ }
+
+ // Consume what is left of a
+ self.a.advance_mut(a_rem);
+
+ cnt -= a_rem;
+ }
+
+ self.b.advance_mut(cnt);
+ }
+}
+
+impl<T, U> IntoIterator for Chain<T, U>
+where
+ T: Buf,
+ U: Buf,
+{
+ type Item = u8;
+ type IntoIter = IntoIter<Chain<T, U>>;
+
+ fn into_iter(self) -> Self::IntoIter {
+ IntoIter::new(self)
+ }
+}
diff --git a/vendor/bytes/src/buf/iter.rs b/vendor/bytes/src/buf/iter.rs
new file mode 100644
index 000000000..8914a40e8
--- /dev/null
+++ b/vendor/bytes/src/buf/iter.rs
@@ -0,0 +1,132 @@
+use crate::Buf;
+
+/// Iterator over the bytes contained by the buffer.
+///
+/// This struct is created by the [`iter`] method on [`Buf`].
+///
+/// # Examples
+///
+/// Basic usage:
+///
+/// ```
+/// use bytes::Bytes;
+///
+/// let buf = Bytes::from(&b"abc"[..]);
+/// let mut iter = buf.into_iter();
+///
+/// assert_eq!(iter.next(), Some(b'a'));
+/// assert_eq!(iter.next(), Some(b'b'));
+/// assert_eq!(iter.next(), Some(b'c'));
+/// assert_eq!(iter.next(), None);
+/// ```
+///
+/// [`iter`]: trait.Buf.html#method.iter
+/// [`Buf`]: trait.Buf.html
+#[derive(Debug)]
+pub struct IntoIter<T> {
+ inner: T,
+}
+
+impl<T> IntoIter<T> {
+ /// Creates an iterator over the bytes contained by the buffer.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::Bytes;
+ ///
+ /// let buf = Bytes::from_static(b"abc");
+ /// let mut iter = buf.into_iter();
+ ///
+ /// assert_eq!(iter.next(), Some(b'a'));
+ /// assert_eq!(iter.next(), Some(b'b'));
+ /// assert_eq!(iter.next(), Some(b'c'));
+ /// assert_eq!(iter.next(), None);
+ /// ```
+ pub(crate) fn new(inner: T) -> IntoIter<T> {
+ IntoIter { inner }
+ }
+
+ /// Consumes this `IntoIter`, returning the underlying value.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::{Buf, Bytes};
+ ///
+ /// let buf = Bytes::from(&b"abc"[..]);
+ /// let mut iter = buf.into_iter();
+ ///
+ /// assert_eq!(iter.next(), Some(b'a'));
+ ///
+ /// let buf = iter.into_inner();
+ /// assert_eq!(2, buf.remaining());
+ /// ```
+ pub fn into_inner(self) -> T {
+ self.inner
+ }
+
+ /// Gets a reference to the underlying `Buf`.
+ ///
+ /// It is inadvisable to directly read from the underlying `Buf`.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::{Buf, Bytes};
+ ///
+ /// let buf = Bytes::from(&b"abc"[..]);
+ /// let mut iter = buf.into_iter();
+ ///
+ /// assert_eq!(iter.next(), Some(b'a'));
+ ///
+ /// assert_eq!(2, iter.get_ref().remaining());
+ /// ```
+ pub fn get_ref(&self) -> &T {
+ &self.inner
+ }
+
+ /// Gets a mutable reference to the underlying `Buf`.
+ ///
+ /// It is inadvisable to directly read from the underlying `Buf`.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::{Buf, BytesMut};
+ ///
+ /// let buf = BytesMut::from(&b"abc"[..]);
+ /// let mut iter = buf.into_iter();
+ ///
+ /// assert_eq!(iter.next(), Some(b'a'));
+ ///
+ /// iter.get_mut().advance(1);
+ ///
+ /// assert_eq!(iter.next(), Some(b'c'));
+ /// ```
+ pub fn get_mut(&mut self) -> &mut T {
+ &mut self.inner
+ }
+}
+
+impl<T: Buf> Iterator for IntoIter<T> {
+ type Item = u8;
+
+ fn next(&mut self) -> Option<u8> {
+ if !self.inner.has_remaining() {
+ return None;
+ }
+
+ let b = self.inner.chunk()[0];
+ self.inner.advance(1);
+
+ Some(b)
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ let rem = self.inner.remaining();
+ (rem, Some(rem))
+ }
+}
+
+impl<T: Buf> ExactSizeIterator for IntoIter<T> {}
diff --git a/vendor/bytes/src/buf/limit.rs b/vendor/bytes/src/buf/limit.rs
new file mode 100644
index 000000000..b422be538
--- /dev/null
+++ b/vendor/bytes/src/buf/limit.rs
@@ -0,0 +1,75 @@
+use crate::buf::UninitSlice;
+use crate::BufMut;
+
+use core::cmp;
+
+/// A `BufMut` adapter which limits the amount of bytes that can be written
+/// to an underlying buffer.
+#[derive(Debug)]
+pub struct Limit<T> {
+ inner: T,
+ limit: usize,
+}
+
+pub(super) fn new<T>(inner: T, limit: usize) -> Limit<T> {
+ Limit { inner, limit }
+}
+
+impl<T> Limit<T> {
+ /// Consumes this `Limit`, returning the underlying value.
+ pub fn into_inner(self) -> T {
+ self.inner
+ }
+
+ /// Gets a reference to the underlying `BufMut`.
+ ///
+ /// It is inadvisable to directly write to the underlying `BufMut`.
+ pub fn get_ref(&self) -> &T {
+ &self.inner
+ }
+
+ /// Gets a mutable reference to the underlying `BufMut`.
+ ///
+ /// It is inadvisable to directly write to the underlying `BufMut`.
+ pub fn get_mut(&mut self) -> &mut T {
+ &mut self.inner
+ }
+
+ /// Returns the maximum number of bytes that can be written
+ ///
+ /// # Note
+ ///
+ /// If the inner `BufMut` has fewer bytes than indicated by this method then
+ /// that is the actual number of available bytes.
+ pub fn limit(&self) -> usize {
+ self.limit
+ }
+
+ /// Sets the maximum number of bytes that can be written.
+ ///
+ /// # Note
+ ///
+ /// If the inner `BufMut` has fewer bytes than `lim` then that is the actual
+ /// number of available bytes.
+ pub fn set_limit(&mut self, lim: usize) {
+ self.limit = lim
+ }
+}
+
+unsafe impl<T: BufMut> BufMut for Limit<T> {
+ fn remaining_mut(&self) -> usize {
+ cmp::min(self.inner.remaining_mut(), self.limit)
+ }
+
+ fn chunk_mut(&mut self) -> &mut UninitSlice {
+ let bytes = self.inner.chunk_mut();
+ let end = cmp::min(bytes.len(), self.limit);
+ &mut bytes[..end]
+ }
+
+ unsafe fn advance_mut(&mut self, cnt: usize) {
+ assert!(cnt <= self.limit);
+ self.inner.advance_mut(cnt);
+ self.limit -= cnt;
+ }
+}
diff --git a/vendor/bytes/src/buf/mod.rs b/vendor/bytes/src/buf/mod.rs
new file mode 100644
index 000000000..c4c0a5724
--- /dev/null
+++ b/vendor/bytes/src/buf/mod.rs
@@ -0,0 +1,41 @@
+//! Utilities for working with buffers.
+//!
+//! A buffer is any structure that contains a sequence of bytes. The bytes may
+//! or may not be stored in contiguous memory. This module contains traits used
+//! to abstract over buffers as well as utilities for working with buffer types.
+//!
+//! # `Buf`, `BufMut`
+//!
+//! These are the two foundational traits for abstractly working with buffers.
+//! They can be thought as iterators for byte structures. They offer additional
+//! performance over `Iterator` by providing an API optimized for byte slices.
+//!
+//! See [`Buf`] and [`BufMut`] for more details.
+//!
+//! [rope]: https://en.wikipedia.org/wiki/Rope_(data_structure)
+//! [`Buf`]: trait.Buf.html
+//! [`BufMut`]: trait.BufMut.html
+
+mod buf_impl;
+mod buf_mut;
+mod chain;
+mod iter;
+mod limit;
+#[cfg(feature = "std")]
+mod reader;
+mod take;
+mod uninit_slice;
+mod vec_deque;
+#[cfg(feature = "std")]
+mod writer;
+
+pub use self::buf_impl::Buf;
+pub use self::buf_mut::BufMut;
+pub use self::chain::Chain;
+pub use self::iter::IntoIter;
+pub use self::limit::Limit;
+pub use self::take::Take;
+pub use self::uninit_slice::UninitSlice;
+
+#[cfg(feature = "std")]
+pub use self::{reader::Reader, writer::Writer};
diff --git a/vendor/bytes/src/buf/reader.rs b/vendor/bytes/src/buf/reader.rs
new file mode 100644
index 000000000..f2b4d98f7
--- /dev/null
+++ b/vendor/bytes/src/buf/reader.rs
@@ -0,0 +1,81 @@
+use crate::Buf;
+
+use std::{cmp, io};
+
+/// A `Buf` adapter which implements `io::Read` for the inner value.
+///
+/// This struct is generally created by calling `reader()` on `Buf`. See
+/// documentation of [`reader()`](trait.Buf.html#method.reader) for more
+/// details.
+#[derive(Debug)]
+pub struct Reader<B> {
+ buf: B,
+}
+
+pub fn new<B>(buf: B) -> Reader<B> {
+ Reader { buf }
+}
+
+impl<B: Buf> Reader<B> {
+ /// Gets a reference to the underlying `Buf`.
+ ///
+ /// It is inadvisable to directly read from the underlying `Buf`.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::Buf;
+ ///
+ /// let buf = b"hello world".reader();
+ ///
+ /// assert_eq!(b"hello world", buf.get_ref());
+ /// ```
+ pub fn get_ref(&self) -> &B {
+ &self.buf
+ }
+
+ /// Gets a mutable reference to the underlying `Buf`.
+ ///
+ /// It is inadvisable to directly read from the underlying `Buf`.
+ pub fn get_mut(&mut self) -> &mut B {
+ &mut self.buf
+ }
+
+ /// Consumes this `Reader`, returning the underlying value.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::Buf;
+ /// use std::io;
+ ///
+ /// let mut buf = b"hello world".reader();
+ /// let mut dst = vec![];
+ ///
+ /// io::copy(&mut buf, &mut dst).unwrap();
+ ///
+ /// let buf = buf.into_inner();
+ /// assert_eq!(0, buf.remaining());
+ /// ```
+ pub fn into_inner(self) -> B {
+ self.buf
+ }
+}
+
+impl<B: Buf + Sized> io::Read for Reader<B> {
+ fn read(&mut self, dst: &mut [u8]) -> io::Result<usize> {
+ let len = cmp::min(self.buf.remaining(), dst.len());
+
+ Buf::copy_to_slice(&mut self.buf, &mut dst[0..len]);
+ Ok(len)
+ }
+}
+
+impl<B: Buf + Sized> io::BufRead for Reader<B> {
+ fn fill_buf(&mut self) -> io::Result<&[u8]> {
+ Ok(self.buf.chunk())
+ }
+ fn consume(&mut self, amt: usize) {
+ self.buf.advance(amt)
+ }
+}
diff --git a/vendor/bytes/src/buf/take.rs b/vendor/bytes/src/buf/take.rs
new file mode 100644
index 000000000..1747f6e83
--- /dev/null
+++ b/vendor/bytes/src/buf/take.rs
@@ -0,0 +1,147 @@
+use crate::Buf;
+
+use core::cmp;
+
+/// A `Buf` adapter which limits the bytes read from an underlying buffer.
+///
+/// This struct is generally created by calling `take()` on `Buf`. See
+/// documentation of [`take()`](trait.BufExt.html#method.take) for more details.
+#[derive(Debug)]
+pub struct Take<T> {
+ inner: T,
+ limit: usize,
+}
+
+pub fn new<T>(inner: T, limit: usize) -> Take<T> {
+ Take { inner, limit }
+}
+
+impl<T> Take<T> {
+ /// Consumes this `Take`, returning the underlying value.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::{Buf, BufMut};
+ ///
+ /// let mut buf = b"hello world".take(2);
+ /// let mut dst = vec![];
+ ///
+ /// dst.put(&mut buf);
+ /// assert_eq!(*dst, b"he"[..]);
+ ///
+ /// let mut buf = buf.into_inner();
+ ///
+ /// dst.clear();
+ /// dst.put(&mut buf);
+ /// assert_eq!(*dst, b"llo world"[..]);
+ /// ```
+ pub fn into_inner(self) -> T {
+ self.inner
+ }
+
+ /// Gets a reference to the underlying `Buf`.
+ ///
+ /// It is inadvisable to directly read from the underlying `Buf`.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::Buf;
+ ///
+ /// let buf = b"hello world".take(2);
+ ///
+ /// assert_eq!(11, buf.get_ref().remaining());
+ /// ```
+ pub fn get_ref(&self) -> &T {
+ &self.inner
+ }
+
+ /// Gets a mutable reference to the underlying `Buf`.
+ ///
+ /// It is inadvisable to directly read from the underlying `Buf`.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::{Buf, BufMut};
+ ///
+ /// let mut buf = b"hello world".take(2);
+ /// let mut dst = vec![];
+ ///
+ /// buf.get_mut().advance(2);
+ ///
+ /// dst.put(&mut buf);
+ /// assert_eq!(*dst, b"ll"[..]);
+ /// ```
+ pub fn get_mut(&mut self) -> &mut T {
+ &mut self.inner
+ }
+
+ /// Returns the maximum number of bytes that can be read.
+ ///
+ /// # Note
+ ///
+ /// If the inner `Buf` has fewer bytes than indicated by this method then
+ /// that is the actual number of available bytes.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::Buf;
+ ///
+ /// let mut buf = b"hello world".take(2);
+ ///
+ /// assert_eq!(2, buf.limit());
+ /// assert_eq!(b'h', buf.get_u8());
+ /// assert_eq!(1, buf.limit());
+ /// ```
+ pub fn limit(&self) -> usize {
+ self.limit
+ }
+
+ /// Sets the maximum number of bytes that can be read.
+ ///
+ /// # Note
+ ///
+ /// If the inner `Buf` has fewer bytes than `lim` then that is the actual
+ /// number of available bytes.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::{Buf, BufMut};
+ ///
+ /// let mut buf = b"hello world".take(2);
+ /// let mut dst = vec![];
+ ///
+ /// dst.put(&mut buf);
+ /// assert_eq!(*dst, b"he"[..]);
+ ///
+ /// dst.clear();
+ ///
+ /// buf.set_limit(3);
+ /// dst.put(&mut buf);
+ /// assert_eq!(*dst, b"llo"[..]);
+ /// ```
+ pub fn set_limit(&mut self, lim: usize) {
+ self.limit = lim
+ }
+}
+
+impl<T: Buf> Buf for Take<T> {
+ fn remaining(&self) -> usize {
+ cmp::min(self.inner.remaining(), self.limit)
+ }
+
+ fn chunk(&self) -> &[u8] {
+ let bytes = self.inner.chunk();
+ &bytes[..cmp::min(bytes.len(), self.limit)]
+ }
+
+ fn advance(&mut self, cnt: usize) {
+ assert!(cnt <= self.limit);
+ self.inner.advance(cnt);
+ self.limit -= cnt;
+ }
+}
diff --git a/vendor/bytes/src/buf/uninit_slice.rs b/vendor/bytes/src/buf/uninit_slice.rs
new file mode 100644
index 000000000..73f4e8924
--- /dev/null
+++ b/vendor/bytes/src/buf/uninit_slice.rs
@@ -0,0 +1,176 @@
+use core::fmt;
+use core::mem::MaybeUninit;
+use core::ops::{
+ Index, IndexMut, Range, RangeFrom, RangeFull, RangeInclusive, RangeTo, RangeToInclusive,
+};
+
+/// Uninitialized byte slice.
+///
+/// Returned by `BufMut::chunk_mut()`, the referenced byte slice may be
+/// uninitialized. The wrapper provides safe access without introducing
+/// undefined behavior.
+///
+/// The safety invariants of this wrapper are:
+///
+/// 1. Reading from an `UninitSlice` is undefined behavior.
+/// 2. Writing uninitialized bytes to an `UninitSlice` is undefined behavior.
+///
+/// The difference between `&mut UninitSlice` and `&mut [MaybeUninit<u8>]` is
+/// that it is possible in safe code to write uninitialized bytes to an
+/// `&mut [MaybeUninit<u8>]`, which this type prohibits.
+#[repr(transparent)]
+pub struct UninitSlice([MaybeUninit<u8>]);
+
+impl UninitSlice {
+ /// Create a `&mut UninitSlice` from a pointer and a length.
+ ///
+ /// # Safety
+ ///
+ /// The caller must ensure that `ptr` references a valid memory region owned
+ /// by the caller representing a byte slice for the duration of `'a`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::buf::UninitSlice;
+ ///
+ /// let bytes = b"hello world".to_vec();
+ /// let ptr = bytes.as_ptr() as *mut _;
+ /// let len = bytes.len();
+ ///
+ /// let slice = unsafe { UninitSlice::from_raw_parts_mut(ptr, len) };
+ /// ```
+ pub unsafe fn from_raw_parts_mut<'a>(ptr: *mut u8, len: usize) -> &'a mut UninitSlice {
+ let maybe_init: &mut [MaybeUninit<u8>] =
+ core::slice::from_raw_parts_mut(ptr as *mut _, len);
+ &mut *(maybe_init as *mut [MaybeUninit<u8>] as *mut UninitSlice)
+ }
+
+ /// Write a single byte at the specified offset.
+ ///
+ /// # Panics
+ ///
+ /// The function panics if `index` is out of bounds.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::buf::UninitSlice;
+ ///
+ /// let mut data = [b'f', b'o', b'o'];
+ /// let slice = unsafe { UninitSlice::from_raw_parts_mut(data.as_mut_ptr(), 3) };
+ ///
+ /// slice.write_byte(0, b'b');
+ ///
+ /// assert_eq!(b"boo", &data[..]);
+ /// ```
+ pub fn write_byte(&mut self, index: usize, byte: u8) {
+ assert!(index < self.len());
+
+ unsafe { self[index..].as_mut_ptr().write(byte) }
+ }
+
+ /// Copies bytes from `src` into `self`.
+ ///
+ /// The length of `src` must be the same as `self`.
+ ///
+ /// # Panics
+ ///
+ /// The function panics if `src` has a different length than `self`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::buf::UninitSlice;
+ ///
+ /// let mut data = [b'f', b'o', b'o'];
+ /// let slice = unsafe { UninitSlice::from_raw_parts_mut(data.as_mut_ptr(), 3) };
+ ///
+ /// slice.copy_from_slice(b"bar");
+ ///
+ /// assert_eq!(b"bar", &data[..]);
+ /// ```
+ pub fn copy_from_slice(&mut self, src: &[u8]) {
+ use core::ptr;
+
+ assert_eq!(self.len(), src.len());
+
+ unsafe {
+ ptr::copy_nonoverlapping(src.as_ptr(), self.as_mut_ptr(), self.len());
+ }
+ }
+
+ /// Return a raw pointer to the slice's buffer.
+ ///
+ /// # Safety
+ ///
+ /// The caller **must not** read from the referenced memory and **must not**
+ /// write **uninitialized** bytes to the slice either.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut data = [0, 1, 2];
+ /// let mut slice = &mut data[..];
+ /// let ptr = BufMut::chunk_mut(&mut slice).as_mut_ptr();
+ /// ```
+ pub fn as_mut_ptr(&mut self) -> *mut u8 {
+ self.0.as_mut_ptr() as *mut _
+ }
+
+ /// Returns the number of bytes in the slice.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use bytes::BufMut;
+ ///
+ /// let mut data = [0, 1, 2];
+ /// let mut slice = &mut data[..];
+ /// let len = BufMut::chunk_mut(&mut slice).len();
+ ///
+ /// assert_eq!(len, 3);
+ /// ```
+ pub fn len(&self) -> usize {
+ self.0.len()
+ }
+}
+
+impl fmt::Debug for UninitSlice {
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt.debug_struct("UninitSlice[...]").finish()
+ }
+}
+
+macro_rules! impl_index {
+ ($($t:ty),*) => {
+ $(
+ impl Index<$t> for UninitSlice {
+ type Output = UninitSlice;
+
+ fn index(&self, index: $t) -> &UninitSlice {
+ let maybe_uninit: &[MaybeUninit<u8>] = &self.0[index];
+ unsafe { &*(maybe_uninit as *const [MaybeUninit<u8>] as *const UninitSlice) }
+ }
+ }
+
+ impl IndexMut<$t> for UninitSlice {
+ fn index_mut(&mut self, index: $t) -> &mut UninitSlice {
+ let maybe_uninit: &mut [MaybeUninit<u8>] = &mut self.0[index];
+ unsafe { &mut *(maybe_uninit as *mut [MaybeUninit<u8>] as *mut UninitSlice) }
+ }
+ }
+ )*
+ };
+}
+
+impl_index!(
+ Range<usize>,
+ RangeFrom<usize>,
+ RangeFull,
+ RangeInclusive<usize>,
+ RangeTo<usize>,
+ RangeToInclusive<usize>
+);
diff --git a/vendor/bytes/src/buf/vec_deque.rs b/vendor/bytes/src/buf/vec_deque.rs
new file mode 100644
index 000000000..263167e83
--- /dev/null
+++ b/vendor/bytes/src/buf/vec_deque.rs
@@ -0,0 +1,22 @@
+use alloc::collections::VecDeque;
+
+use super::Buf;
+
+impl Buf for VecDeque<u8> {
+ fn remaining(&self) -> usize {
+ self.len()
+ }
+
+ fn chunk(&self) -> &[u8] {
+ let (s1, s2) = self.as_slices();
+ if s1.is_empty() {
+ s2
+ } else {
+ s1
+ }
+ }
+
+ fn advance(&mut self, cnt: usize) {
+ self.drain(..cnt);
+ }
+}
diff --git a/vendor/bytes/src/buf/writer.rs b/vendor/bytes/src/buf/writer.rs
new file mode 100644
index 000000000..261d7cd09
--- /dev/null
+++ b/vendor/bytes/src/buf/writer.rs
@@ -0,0 +1,88 @@
+use crate::BufMut;
+
+use std::{cmp, io};
+
+/// A `BufMut` adapter which implements `io::Write` for the inner value.
+///
+/// This struct is generally created by calling `writer()` on `BufMut`. See
+/// documentation of [`writer()`](trait.BufMut.html#method.writer) for more
+/// details.
+#[derive(Debug)]
+pub struct Writer<B> {
+ buf: B,
+}
+
+pub fn new<B>(buf: B) -> Writer<B> {
+ Writer { buf }
+}
+
+impl<B: BufMut> Writer<B> {
+ /// Gets a reference to the underlying `BufMut`.
+ ///
+ /// It is inadvisable to directly write to the underlying `BufMut`.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::BufMut;
+ ///
+ /// let buf = Vec::with_capacity(1024).writer();
+ ///
+ /// assert_eq!(1024, buf.get_ref().capacity());
+ /// ```
+ pub fn get_ref(&self) -> &B {
+ &self.buf
+ }
+
+ /// Gets a mutable reference to the underlying `BufMut`.
+ ///
+ /// It is inadvisable to directly write to the underlying `BufMut`.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::BufMut;
+ ///
+ /// let mut buf = vec![].writer();
+ ///
+ /// buf.get_mut().reserve(1024);
+ ///
+ /// assert_eq!(1024, buf.get_ref().capacity());
+ /// ```
+ pub fn get_mut(&mut self) -> &mut B {
+ &mut self.buf
+ }
+
+ /// Consumes this `Writer`, returning the underlying value.
+ ///
+ /// # Examples
+ ///
+ /// ```rust
+ /// use bytes::BufMut;
+ /// use std::io;
+ ///
+ /// let mut buf = vec![].writer();
+ /// let mut src = &b"hello world"[..];
+ ///
+ /// io::copy(&mut src, &mut buf).unwrap();
+ ///
+ /// let buf = buf.into_inner();
+ /// assert_eq!(*buf, b"hello world"[..]);
+ /// ```
+ pub fn into_inner(self) -> B {
+ self.buf
+ }
+}
+
+impl<B: BufMut + Sized> io::Write for Writer<B> {
+ fn write(&mut self, src: &[u8]) -> io::Result<usize> {
+ let n = cmp::min(self.buf.remaining_mut(), src.len());
+
+ self.buf.put(&src[0..n]);
+ Ok(n)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ Ok(())
+ }
+}