[−][src]Struct bcder::int::Integer
A BER encoded integer.
As integers are variable length in BER, this type is just a simple wrapper
atop the underlying Bytes
value containing the raw content. A value of
this type is a signed integer. If a value is defined as an unsigned
integer, i.e., as INTEGER (0..MAX)
, you should use the sibling type
Unsigned
instead.
In addition to these two generic types, the content decoders also provide
methods to parse integers into native integer types such as i8
. If the
range of such a type is obviously enough, you might want to consider
using these methods instead.
BER Encoding
In BER, an INTEGER is encoded as a primitive value with the content octets providing a variable-length, big-endian, two‘s complement byte sequence of that integer. Thus, the most-significant bit of the first octet serves as the sign bit.
Methods
impl Integer
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pub fn take_from<S: Source>(cons: &mut Constructed<S>) -> Result<Self, S::Err>
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Takes a single signed integer from the beginning of an encoded value.
This requires the next value in cons
to be a primitive value with
a correctly encoded signed integer.
pub fn from_primitive<S: Source>(
prim: &mut Primitive<S>
) -> Result<Self, S::Err>
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prim: &mut Primitive<S>
) -> Result<Self, S::Err>
Constructs a signed integer from the content of a primitive value.
pub fn i8_from_primitive<S: Source>(
prim: &mut Primitive<S>
) -> Result<i8, S::Err>
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prim: &mut Primitive<S>
) -> Result<i8, S::Err>
Constructs an i8
from the content of a primitive value.
pub fn i16_from_primitive<S: Source>(
prim: &mut Primitive<S>
) -> Result<i16, S::Err>
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prim: &mut Primitive<S>
) -> Result<i16, S::Err>
Constructs an i16
from the content of a primitive value.
pub fn i32_from_primitive<S: Source>(
prim: &mut Primitive<S>
) -> Result<i32, S::Err>
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prim: &mut Primitive<S>
) -> Result<i32, S::Err>
Constructs an i32
from the content of a primitive value.
pub fn i64_from_primitive<S: Source>(
prim: &mut Primitive<S>
) -> Result<i64, S::Err>
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prim: &mut Primitive<S>
) -> Result<i64, S::Err>
Constructs an i64
from the content of a primitive value.
pub fn i128_from_primitive<S: Source>(
prim: &mut Primitive<S>
) -> Result<i128, S::Err>
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prim: &mut Primitive<S>
) -> Result<i128, S::Err>
Constructs an i128
from the content of a primitive value.
pub fn into_bytes(self) -> Bytes
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Trades the integer into a bytes value with the raw content octets.
pub fn as_slice(&self) -> &[u8]
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Returns a bytes slice with the raw content.
pub fn is_zero(&self) -> bool
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Returns whether the number is zero.
pub fn is_positive(&self) -> bool
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Returns whether the integer is positive.
Also returns false
if the number is zero.
pub fn is_negative(&self) -> bool
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Returns whether the integer is negative.
Also returns false
if the number is zero.
Trait Implementations
impl<'a> PrimitiveContent for &'a Integer
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const TAG: Tag
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fn encoded_len(&self, _mode: Mode) -> usize
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fn write_encoded<W: Write>(
&self,
_mode: Mode,
target: &mut W
) -> Result<(), Error>
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&self,
_mode: Mode,
target: &mut W
) -> Result<(), Error>
fn to_encoded_bytes(&self, mode: Mode) -> Bytes
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fn encode(self) -> Primitive<Self>
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fn encode_as(self, tag: Tag) -> Primitive<Self>
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fn encode_ref(&self) -> Primitive<&Self>
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fn encode_ref_as(&self, tag: Tag) -> Primitive<&Self>
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impl AsRef<Bytes> for Integer
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impl AsRef<[u8]> for Integer
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impl AsRef<Integer> for Unsigned
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impl Eq for Integer
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impl Clone for Integer
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impl PartialOrd<Integer> for Integer
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fn partial_cmp(&self, other: &Self) -> Option<Ordering>
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#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
impl Ord for Integer
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fn cmp(&self, other: &Self) -> Ordering
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fn max(self, other: Self) -> Self
1.21.0[src]
fn min(self, other: Self) -> Self
1.21.0[src]
fn clamp(self, min: Self, max: Self) -> Self
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impl PartialEq<Integer> for Integer
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impl PartialEq<Unsigned> for Integer
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impl From<i8> for Integer
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impl From<i16> for Integer
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impl From<i32> for Integer
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impl From<i64> for Integer
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impl From<i128> for Integer
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impl From<u8> for Integer
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impl From<u16> for Integer
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impl From<u32> for Integer
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impl From<u64> for Integer
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impl From<u128> for Integer
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impl Hash for Integer
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fn hash<H: Hasher>(&self, h: &mut H)
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fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
impl Debug for Integer
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Auto Trait Implementations
impl Unpin for Integer
impl Sync for Integer
impl Send for Integer
impl UnwindSafe for Integer
impl RefUnwindSafe for Integer
Blanket Implementations
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> From<T> for T
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,