Struct hyper::header::ContentLength
[−]
[src]
pub struct ContentLength(pub u64);
Content-Length
header, defined in
RFC7230
When a message does not have a Transfer-Encoding
header field, a
Content-Length header field can provide the anticipated size, as a
decimal number of octets, for a potential payload body. For messages
that do include a payload body, the Content-Length field-value
provides the framing information necessary for determining where the
body (and message) ends. For messages that do not include a payload
body, the Content-Length indicates the size of the selected
representation.
Note that setting this header will remove any previously set
Transfer-Encoding
header, in accordance with
RFC7230:
A sender MUST NOT send a Content-Length header field in any message that contains a Transfer-Encoding header field.
ABNF
Content-Length = 1*DIGIT
Example values
3495
Example
use hyper::header::{Headers, ContentLength}; let mut headers = Headers::new(); headers.set(ContentLength(1024u64));
Methods from Deref<Target = u64>
fn count_ones(self) -> u32
1.0.0[src]
Returns the number of ones in the binary representation of self
.
Examples
Basic usage:
let n = 0b01001100u8; assert_eq!(n.count_ones(), 3);
fn count_zeros(self) -> u32
1.0.0[src]
Returns the number of zeros in the binary representation of self
.
Examples
Basic usage:
let n = 0b01001100u8; assert_eq!(n.count_zeros(), 5);
fn leading_zeros(self) -> u32
1.0.0[src]
Returns the number of leading zeros in the binary representation
of self
.
Examples
Basic usage:
let n = 0b0101000u16; assert_eq!(n.leading_zeros(), 10);
fn trailing_zeros(self) -> u32
1.0.0[src]
Returns the number of trailing zeros in the binary representation
of self
.
Examples
Basic usage:
let n = 0b0101000u16; assert_eq!(n.trailing_zeros(), 3);
fn rotate_left(self, n: u32) -> u64
1.0.0[src]
Shifts the bits to the left by a specified amount, n
,
wrapping the truncated bits to the end of the resulting integer.
Please note this isn't the same operation as <<
!
Examples
Basic usage:
let n = 0x0123456789ABCDEFu64; let m = 0x3456789ABCDEF012u64; assert_eq!(n.rotate_left(12), m);
fn rotate_right(self, n: u32) -> u64
1.0.0[src]
Shifts the bits to the right by a specified amount, n
,
wrapping the truncated bits to the beginning of the resulting
integer.
Please note this isn't the same operation as >>
!
Examples
Basic usage:
let n = 0x0123456789ABCDEFu64; let m = 0xDEF0123456789ABCu64; assert_eq!(n.rotate_right(12), m);
fn swap_bytes(self) -> u64
1.0.0[src]
Reverses the byte order of the integer.
Examples
Basic usage:
let n = 0x0123456789ABCDEFu64; let m = 0xEFCDAB8967452301u64; assert_eq!(n.swap_bytes(), m);
fn to_be(self) -> u64
1.0.0[src]
Converts self
to big endian from the target's endianness.
On big endian this is a no-op. On little endian the bytes are swapped.
Examples
Basic usage:
let n = 0x0123456789ABCDEFu64; if cfg!(target_endian = "big") { assert_eq!(n.to_be(), n) } else { assert_eq!(n.to_be(), n.swap_bytes()) }
fn to_le(self) -> u64
1.0.0[src]
Converts self
to little endian from the target's endianness.
On little endian this is a no-op. On big endian the bytes are swapped.
Examples
Basic usage:
let n = 0x0123456789ABCDEFu64; if cfg!(target_endian = "little") { assert_eq!(n.to_le(), n) } else { assert_eq!(n.to_le(), n.swap_bytes()) }
fn checked_add(self, other: u64) -> Option<u64>
1.0.0[src]
Checked integer addition. Computes self + other
, returning None
if overflow occurred.
Examples
Basic usage:
assert_eq!(5u16.checked_add(65530), Some(65535)); assert_eq!(6u16.checked_add(65530), None);
fn checked_sub(self, other: u64) -> Option<u64>
1.0.0[src]
Checked integer subtraction. Computes self - other
, returning
None
if underflow occurred.
Examples
Basic usage:
assert_eq!(1u8.checked_sub(1), Some(0)); assert_eq!(0u8.checked_sub(1), None);
fn checked_mul(self, other: u64) -> Option<u64>
1.0.0[src]
Checked integer multiplication. Computes self * other
, returning
None
if underflow or overflow occurred.
Examples
Basic usage:
assert_eq!(5u8.checked_mul(51), Some(255)); assert_eq!(5u8.checked_mul(52), None);
fn checked_div(self, other: u64) -> Option<u64>
1.0.0[src]
Checked integer division. Computes self / other
, returning None
if other == 0
or the operation results in underflow or overflow.
Examples
Basic usage:
assert_eq!(128u8.checked_div(2), Some(64)); assert_eq!(1u8.checked_div(0), None);
fn checked_rem(self, other: u64) -> Option<u64>
1.7.0[src]
Checked integer remainder. Computes self % other
, returning None
if other == 0
or the operation results in underflow or overflow.
Examples
Basic usage:
assert_eq!(5u32.checked_rem(2), Some(1)); assert_eq!(5u32.checked_rem(0), None);
fn checked_neg(self) -> Option<u64>
1.7.0[src]
Checked negation. Computes -self
, returning None
unless self == 0
.
Note that negating any positive integer will overflow.
Examples
Basic usage:
assert_eq!(0u32.checked_neg(), Some(0)); assert_eq!(1u32.checked_neg(), None);
fn checked_shl(self, rhs: u32) -> Option<u64>
1.7.0[src]
Checked shift left. Computes self << rhs
, returning None
if rhs
is larger than or equal to the number of bits in self
.
Examples
Basic usage:
assert_eq!(0x10u32.checked_shl(4), Some(0x100)); assert_eq!(0x10u32.checked_shl(33), None);
fn checked_shr(self, rhs: u32) -> Option<u64>
1.7.0[src]
Checked shift right. Computes self >> rhs
, returning None
if rhs
is larger than or equal to the number of bits in self
.
Examples
Basic usage:
assert_eq!(0x10u32.checked_shr(4), Some(0x1)); assert_eq!(0x10u32.checked_shr(33), None);
fn saturating_add(self, other: u64) -> u64
1.0.0[src]
Saturating integer addition. Computes self + other
, saturating at
the numeric bounds instead of overflowing.
Examples
Basic usage:
assert_eq!(100u8.saturating_add(1), 101); assert_eq!(200u8.saturating_add(127), 255);
fn saturating_sub(self, other: u64) -> u64
1.0.0[src]
Saturating integer subtraction. Computes self - other
, saturating
at the numeric bounds instead of overflowing.
Examples
Basic usage:
assert_eq!(100u8.saturating_sub(27), 73); assert_eq!(13u8.saturating_sub(127), 0);
fn saturating_mul(self, other: u64) -> u64
1.7.0[src]
Saturating integer multiplication. Computes self * other
,
saturating at the numeric bounds instead of overflowing.
Examples
Basic usage:
use std::u32; assert_eq!(100u32.saturating_mul(127), 12700); assert_eq!((1u32 << 23).saturating_mul(1 << 23), u32::MAX);
fn wrapping_add(self, rhs: u64) -> u64
1.0.0[src]
Wrapping (modular) addition. Computes self + other
,
wrapping around at the boundary of the type.
Examples
Basic usage:
assert_eq!(200u8.wrapping_add(55), 255); assert_eq!(200u8.wrapping_add(155), 99);
fn wrapping_sub(self, rhs: u64) -> u64
1.0.0[src]
Wrapping (modular) subtraction. Computes self - other
,
wrapping around at the boundary of the type.
Examples
Basic usage:
assert_eq!(100u8.wrapping_sub(100), 0); assert_eq!(100u8.wrapping_sub(155), 201);
fn wrapping_mul(self, rhs: u64) -> u64
1.0.0[src]
Wrapping (modular) multiplication. Computes self * other
, wrapping around at the boundary of the type.
Examples
Basic usage:
assert_eq!(10u8.wrapping_mul(12), 120); assert_eq!(25u8.wrapping_mul(12), 44);
fn wrapping_div(self, rhs: u64) -> u64
1.2.0[src]
Wrapping (modular) division. Computes self / other
.
Wrapped division on unsigned types is just normal division.
There's no way wrapping could ever happen.
This function exists, so that all operations
are accounted for in the wrapping operations.
Examples
Basic usage:
assert_eq!(100u8.wrapping_div(10), 10);
fn wrapping_rem(self, rhs: u64) -> u64
1.2.0[src]
Wrapping (modular) remainder. Computes self % other
.
Wrapped remainder calculation on unsigned types is
just the regular remainder calculation.
There's no way wrapping could ever happen.
This function exists, so that all operations
are accounted for in the wrapping operations.
Examples
Basic usage:
assert_eq!(100u8.wrapping_rem(10), 0);
fn wrapping_neg(self) -> u64
1.2.0[src]
Wrapping (modular) negation. Computes -self
,
wrapping around at the boundary of the type.
Since unsigned types do not have negative equivalents
all applications of this function will wrap (except for -0
).
For values smaller than the corresponding signed type's maximum
the result is the same as casting the corresponding signed value.
Any larger values are equivalent to MAX + 1 - (val - MAX - 1)
where
MAX
is the corresponding signed type's maximum.
Examples
Basic usage:
assert_eq!(100u8.wrapping_neg(), 156); assert_eq!(0u8.wrapping_neg(), 0); assert_eq!(180u8.wrapping_neg(), 76); assert_eq!(180u8.wrapping_neg(), (127 + 1) - (180u8 - (127 + 1)));
fn wrapping_shl(self, rhs: u32) -> u64
1.2.0[src]
Panic-free bitwise shift-left; yields self << mask(rhs)
,
where mask
removes any high-order bits of rhs
that
would cause the shift to exceed the bitwidth of the type.
Note that this is not the same as a rotate-left; the
RHS of a wrapping shift-left is restricted to the range
of the type, rather than the bits shifted out of the LHS
being returned to the other end. The primitive integer
types all implement a rotate_left
function, which may
be what you want instead.
Examples
Basic usage:
assert_eq!(1u8.wrapping_shl(7), 128); assert_eq!(1u8.wrapping_shl(8), 1);
fn wrapping_shr(self, rhs: u32) -> u64
1.2.0[src]
Panic-free bitwise shift-right; yields self >> mask(rhs)
,
where mask
removes any high-order bits of rhs
that
would cause the shift to exceed the bitwidth of the type.
Note that this is not the same as a rotate-right; the
RHS of a wrapping shift-right is restricted to the range
of the type, rather than the bits shifted out of the LHS
being returned to the other end. The primitive integer
types all implement a rotate_right
function, which may
be what you want instead.
Examples
Basic usage:
assert_eq!(128u8.wrapping_shr(7), 1); assert_eq!(128u8.wrapping_shr(8), 128);
fn overflowing_add(self, rhs: u64) -> (u64, bool)
1.7.0[src]
Calculates self
+ rhs
Returns a tuple of the addition along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would have occurred then the wrapped value is returned.
Examples
Basic usage
use std::u32; assert_eq!(5u32.overflowing_add(2), (7, false)); assert_eq!(u32::MAX.overflowing_add(1), (0, true));
fn overflowing_sub(self, rhs: u64) -> (u64, bool)
1.7.0[src]
Calculates self
- rhs
Returns a tuple of the subtraction along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would have occurred then the wrapped value is returned.
Examples
Basic usage
use std::u32; assert_eq!(5u32.overflowing_sub(2), (3, false)); assert_eq!(0u32.overflowing_sub(1), (u32::MAX, true));
fn overflowing_mul(self, rhs: u64) -> (u64, bool)
1.7.0[src]
Calculates the multiplication of self
and rhs
.
Returns a tuple of the multiplication along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would have occurred then the wrapped value is returned.
Examples
Basic usage
assert_eq!(5u32.overflowing_mul(2), (10, false)); assert_eq!(1_000_000_000u32.overflowing_mul(10), (1410065408, true));
fn overflowing_div(self, rhs: u64) -> (u64, bool)
1.7.0[src]
Calculates the divisor when self
is divided by rhs
.
Returns a tuple of the divisor along with a boolean indicating
whether an arithmetic overflow would occur. Note that for unsigned
integers overflow never occurs, so the second value is always
false
.
Panics
This function will panic if rhs
is 0.
Examples
Basic usage
assert_eq!(5u32.overflowing_div(2), (2, false));
fn overflowing_rem(self, rhs: u64) -> (u64, bool)
1.7.0[src]
Calculates the remainder when self
is divided by rhs
.
Returns a tuple of the remainder after dividing along with a boolean
indicating whether an arithmetic overflow would occur. Note that for
unsigned integers overflow never occurs, so the second value is
always false
.
Panics
This function will panic if rhs
is 0.
Examples
Basic usage
assert_eq!(5u32.overflowing_rem(2), (1, false));
fn overflowing_neg(self) -> (u64, bool)
1.7.0[src]
Negates self in an overflowing fashion.
Returns !self + 1
using wrapping operations to return the value
that represents the negation of this unsigned value. Note that for
positive unsigned values overflow always occurs, but negating 0 does
not overflow.
Examples
Basic usage
assert_eq!(0u32.overflowing_neg(), (0, false)); assert_eq!(2u32.overflowing_neg(), (-2i32 as u32, true));
fn overflowing_shl(self, rhs: u32) -> (u64, bool)
1.7.0[src]
Shifts self left by rhs
bits.
Returns a tuple of the shifted version of self along with a boolean indicating whether the shift value was larger than or equal to the number of bits. If the shift value is too large, then value is masked (N-1) where N is the number of bits, and this value is then used to perform the shift.
Examples
Basic usage
assert_eq!(0x10u32.overflowing_shl(4), (0x100, false)); assert_eq!(0x10u32.overflowing_shl(36), (0x100, true));
fn overflowing_shr(self, rhs: u32) -> (u64, bool)
1.7.0[src]
Shifts self right by rhs
bits.
Returns a tuple of the shifted version of self along with a boolean indicating whether the shift value was larger than or equal to the number of bits. If the shift value is too large, then value is masked (N-1) where N is the number of bits, and this value is then used to perform the shift.
Examples
Basic usage
assert_eq!(0x10u32.overflowing_shr(4), (0x1, false)); assert_eq!(0x10u32.overflowing_shr(36), (0x1, true));
fn pow(self, exp: u32) -> u64
1.0.0[src]
Raises self to the power of exp
, using exponentiation by squaring.
Examples
Basic usage:
assert_eq!(2u32.pow(4), 16);
fn is_power_of_two(self) -> bool
1.0.0[src]
Returns true
if and only if self == 2^k
for some k
.
Examples
Basic usage:
assert!(16u8.is_power_of_two()); assert!(!10u8.is_power_of_two());
fn next_power_of_two(self) -> u64
1.0.0[src]
Returns the smallest power of two greater than or equal to self
.
When return value overflows (i.e. self > (1 << (N-1))
for type
uN
), it panics in debug mode and return value is wrapped to 0 in
release mode (the only situation in which method can return 0).
Examples
Basic usage:
assert_eq!(2u8.next_power_of_two(), 2); assert_eq!(3u8.next_power_of_two(), 4);
fn checked_next_power_of_two(self) -> Option<u64>
1.0.0[src]
Returns the smallest power of two greater than or equal to n
. If
the next power of two is greater than the type's maximum value,
None
is returned, otherwise the power of two is wrapped in Some
.
Examples
Basic usage:
assert_eq!(2u8.checked_next_power_of_two(), Some(2)); assert_eq!(3u8.checked_next_power_of_two(), Some(4)); assert_eq!(200u8.checked_next_power_of_two(), None);
Trait Implementations
impl Clone for ContentLength
[src]
fn clone(&self) -> ContentLength
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
Performs copy-assignment from source
. Read more
impl Copy for ContentLength
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impl Debug for ContentLength
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impl PartialEq for ContentLength
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fn eq(&self, __arg_0: &ContentLength) -> bool
[src]
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, __arg_0: &ContentLength) -> bool
[src]
This method tests for !=
.
impl Header for ContentLength
[src]
fn header_name() -> &'static str
[src]
Returns the name of the header field this belongs to. Read more
fn parse_header(raw: &Raw) -> Result<ContentLength>
[src]
Parse a header from a raw stream of bytes. Read more
fn fmt_header(&self, f: &mut Formatter) -> Result
[src]
Format a header to outgoing stream. Read more
impl Display for ContentLength
[src]
fn fmt(&self, f: &mut Formatter) -> Result
[src]
Formats the value using the given formatter. Read more
impl Deref for ContentLength
[src]
type Target = u64
The resulting type after dereferencing.
fn deref(&self) -> &u64
[src]
Dereferences the value.