Struct http_stub::header::AccessControlMaxAge [] [src]

pub struct AccessControlMaxAge(pub u32);

Access-Control-Max-Age header, part of CORS

The Access-Control-Max-Age header indicates how long the results of a preflight request can be cached in a preflight result cache.

ABNF

Access-Control-Max-Age = \"Access-Control-Max-Age\" \":\" delta-seconds

Example values

Examples

use hyper::header::{Headers, AccessControlMaxAge};

let mut headers = Headers::new();
headers.set(AccessControlMaxAge(1728000u32));

Methods from Deref<Target=u32>

1.0.0fn count_ones(self) -> u32

Returns the number of ones in the binary representation of self.

Examples

Basic usage:

let n = 0b01001100u8;

assert_eq!(n.count_ones(), 3);

1.0.0fn count_zeros(self) -> u32

Returns the number of zeros in the binary representation of self.

Examples

Basic usage:

let n = 0b01001100u8;

assert_eq!(n.count_zeros(), 5);

1.0.0fn leading_zeros(self) -> u32

Returns the number of leading zeros in the binary representation of self.

Examples

Basic usage:

let n = 0b0101000u16;

assert_eq!(n.leading_zeros(), 10);

1.0.0fn trailing_zeros(self) -> u32

Returns the number of trailing zeros in the binary representation of self.

Examples

Basic usage:

let n = 0b0101000u16;

assert_eq!(n.trailing_zeros(), 3);

1.0.0fn rotate_left(self, n: u32) -> u32

Shifts the bits to the left by a specified amount, n, wrapping the truncated bits to the end of the resulting integer.

Examples

Basic usage:

let n = 0x0123456789ABCDEFu64;
let m = 0x3456789ABCDEF012u64;

assert_eq!(n.rotate_left(12), m);

1.0.0fn rotate_right(self, n: u32) -> u32

Shifts the bits to the right by a specified amount, n, wrapping the truncated bits to the beginning of the resulting integer.

Examples

Basic usage:

let n = 0x0123456789ABCDEFu64;
let m = 0xDEF0123456789ABCu64;

assert_eq!(n.rotate_right(12), m);

1.0.0fn swap_bytes(self) -> u32

Reverses the byte order of the integer.

Examples

Basic usage:

let n = 0x0123456789ABCDEFu64;
let m = 0xEFCDAB8967452301u64;

assert_eq!(n.swap_bytes(), m);

1.0.0fn to_be(self) -> u32

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())
}

1.0.0fn to_le(self) -> u32

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())
}

1.0.0fn checked_add(self, other: u32) -> Option<u32>

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);

1.0.0fn checked_sub(self, other: u32) -> Option<u32>

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);

1.0.0fn checked_mul(self, other: u32) -> Option<u32>

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);

1.0.0fn checked_div(self, other: u32) -> Option<u32>

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);

1.7.0fn checked_rem(self, other: u32) -> Option<u32>

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);

1.7.0fn checked_neg(self) -> Option<u32>

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);

1.7.0fn checked_shl(self, rhs: u32) -> Option<u32>

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);

1.7.0fn checked_shr(self, rhs: u32) -> Option<u32>

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);

1.0.0fn saturating_add(self, other: u32) -> u32

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);

1.0.0fn saturating_sub(self, other: u32) -> u32

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);

1.7.0fn saturating_mul(self, other: u32) -> u32

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);

1.0.0fn wrapping_add(self, rhs: u32) -> u32

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);

1.0.0fn wrapping_sub(self, rhs: u32) -> u32

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);

1.0.0fn wrapping_mul(self, rhs: u32) -> u32

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);

1.2.0fn wrapping_div(self, rhs: u32) -> u32

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);

1.2.0fn wrapping_rem(self, rhs: u32) -> u32

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);

1.2.0fn wrapping_neg(self) -> u32

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)));

1.2.0fn wrapping_shl(self, rhs: u32) -> u32

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);

1.2.0fn wrapping_shr(self, rhs: u32) -> u32

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);

1.7.0fn overflowing_add(self, rhs: u32) -> (u32, bool)

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));

1.7.0fn overflowing_sub(self, rhs: u32) -> (u32, bool)

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));

1.7.0fn overflowing_mul(self, rhs: u32) -> (u32, bool)

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));

1.7.0fn overflowing_div(self, rhs: u32) -> (u32, bool)

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));

1.7.0fn overflowing_rem(self, rhs: u32) -> (u32, bool)

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));

1.7.0fn overflowing_neg(self) -> (u32, bool)

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));

1.7.0fn overflowing_shl(self, rhs: u32) -> (u32, bool)

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));

1.7.0fn overflowing_shr(self, rhs: u32) -> (u32, bool)

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));

1.0.0fn pow(self, exp: u32) -> u32

Raises self to the power of exp, using exponentiation by squaring.

Examples

Basic usage:

assert_eq!(2u32.pow(4), 16);

1.0.0fn is_power_of_two(self) -> bool

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());

1.0.0fn next_power_of_two(self) -> u32

Returns the smallest power of two greater than or equal to self. Unspecified behavior on overflow.

Examples

Basic usage:

assert_eq!(2u8.next_power_of_two(), 2);
assert_eq!(3u8.next_power_of_two(), 4);

1.0.0fn checked_next_power_of_two(self) -> Option<u32>

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 Display for AccessControlMaxAge

fn fmt(&self, f: &mut Formatter) -> Result<(), Error>

impl HeaderFormat for AccessControlMaxAge

fn fmt_header(&self, f: &mut Formatter) -> Result<(), Error>

impl Header for AccessControlMaxAge

fn header_name() -> &'static str

fn parse_header(raw: &[Vec<u8>]) -> Result<AccessControlMaxAge, Error>

impl DerefMut for AccessControlMaxAge

fn deref_mut(&mut self) -> &mut u32

impl Deref for AccessControlMaxAge

type Target = u32

fn deref(&self) -> &u32

Derived Implementations

impl Clone for AccessControlMaxAge

fn clone(&self) -> AccessControlMaxAge

impl Debug for AccessControlMaxAge

fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>

impl PartialEq<AccessControlMaxAge> for AccessControlMaxAge

fn eq(&self, __arg_0: &AccessControlMaxAge) -> bool

fn ne(&self, __arg_0: &AccessControlMaxAge) -> bool