Struct bytes::buf::Take
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pub struct Take<T> { /* fields omitted */ }
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()
for more details.
Methods
impl<T> Take<T>
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fn into_inner(self) -> T
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Consumes this Take
, returning the underlying value.
Examples
use bytes::{Buf, BufMut}; use std::io::Cursor; let mut buf = Cursor::new(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"[..]);
fn get_ref(&self) -> &T
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Gets a reference to the underlying Buf
.
It is inadvisable to directly read from the underlying Buf
.
Examples
use bytes::{Buf, BufMut}; use std::io::Cursor; let mut buf = Cursor::new(b"hello world").take(2); assert_eq!(0, buf.get_ref().position());
fn get_mut(&mut self) -> &mut T
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Gets a mutable reference to the underlying Buf
.
It is inadvisable to directly read from the underlying Buf
.
Examples
use bytes::{Buf, BufMut}; use std::io::Cursor; let mut buf = Cursor::new(b"hello world").take(2); let mut dst = vec![]; buf.get_mut().set_position(2); dst.put(&mut buf); assert_eq!(*dst, b"ll"[..]);
fn limit(&self) -> usize
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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
use bytes::Buf; use std::io::Cursor; let mut buf = Cursor::new(b"hello world").take(2); assert_eq!(2, buf.limit()); assert_eq!(b'h', buf.get_u8()); assert_eq!(1, buf.limit());
fn set_limit(&mut self, lim: usize)
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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
use bytes::{Buf, BufMut}; use std::io::Cursor; let mut buf = Cursor::new(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"[..]);
Trait Implementations
impl<T: Debug> Debug for Take<T>
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impl<T: Buf> Buf for Take<T>
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fn remaining(&self) -> usize
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Returns the number of bytes between the current position and the end of the buffer. Read more
fn bytes(&self) -> &[u8]
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Returns a slice starting at the current position and of length between 0 and Buf::remaining()
. Read more
fn advance(&mut self, cnt: usize)
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Advance the internal cursor of the Buf Read more
fn bytes_vec<'a>(&'a self, dst: &mut [&'a IoVec]) -> usize
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Fills dst
with potentially multiple slices starting at self
's current position. Read more
fn has_remaining(&self) -> bool
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Returns true if there are any more bytes to consume Read more
fn copy_to_slice(&mut self, dst: &mut [u8])
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Copies bytes from self
into dst
. Read more
fn get_u8(&mut self) -> u8
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Gets an unsigned 8 bit integer from self
. Read more
fn get_i8(&mut self) -> i8
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Gets a signed 8 bit integer from self
. Read more
fn get_u16<T: ByteOrder>(&mut self) -> u16
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Gets an unsigned 16 bit integer from self
in the specified byte order. Read more
fn get_i16<T: ByteOrder>(&mut self) -> i16
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Gets a signed 16 bit integer from self
in the specified byte order. Read more
fn get_u32<T: ByteOrder>(&mut self) -> u32
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Gets an unsigned 32 bit integer from self
in the specified byte order. Read more
fn get_i32<T: ByteOrder>(&mut self) -> i32
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Gets a signed 32 bit integer from self
in the specified byte order. Read more
fn get_u64<T: ByteOrder>(&mut self) -> u64
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Gets an unsigned 64 bit integer from self
in the specified byte order. Read more
fn get_i64<T: ByteOrder>(&mut self) -> i64
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Gets a signed 64 bit integer from self
in the specified byte order. Read more
fn get_uint<T: ByteOrder>(&mut self, nbytes: usize) -> u64
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Gets an unsigned n-byte integer from self
in the specified byte order. Read more
fn get_int<T: ByteOrder>(&mut self, nbytes: usize) -> i64
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Gets a signed n-byte integer from self
in the specified byte order. Read more
fn get_f32<T: ByteOrder>(&mut self) -> f32
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Gets an IEEE754 single-precision (4 bytes) floating point number from self
in the specified byte order. Read more
fn get_f64<T: ByteOrder>(&mut self) -> f64
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Gets an IEEE754 double-precision (8 bytes) floating point number from self
in the specified byte order. Read more
fn collect<B>(self) -> B where
Self: Sized,
B: FromBuf,
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Self: Sized,
B: FromBuf,
Transforms a Buf
into a concrete buffer. Read more
fn take(self, limit: usize) -> Take<Self> where
Self: Sized,
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Self: Sized,
Creates an adaptor which will read at most limit
bytes from self
. Read more
fn chain<U>(self, next: U) -> Chain<Self, U::Buf> where
U: IntoBuf,
Self: Sized,
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U: IntoBuf,
Self: Sized,
Creates an adaptor which will chain this buffer with another. Read more
fn by_ref(&mut self) -> &mut Self where
Self: Sized,
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Self: Sized,
Creates a "by reference" adaptor for this instance of Buf
. Read more
fn reader(self) -> Reader<Self> where
Self: Sized,
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Self: Sized,
Creates an adaptor which implements the Read
trait for self
. Read more
fn iter(self) -> Iter<Self> where
Self: Sized,
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Self: Sized,
Returns an iterator over the bytes contained by the buffer. Read more