[−][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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Encodes the value to bytes (useful when you need to sign a structure)
fn encode(self) -> Primitive<Self>
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Returns a value encoder for this content using the natural tag. Read more
fn encode_as(self, tag: Tag) -> Primitive<Self>
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Returns a value encoder for this content using the given tag. Read more
fn encode_ref(&self) -> Primitive<&Self>
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Returns a value encoder for a reference using the natural tag.
fn encode_ref_as(&self, tag: Tag) -> Primitive<&Self>
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Returns a value encoder for a reference using the given tag.
impl Clone for Integer
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fn clone(&self) -> Integer
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fn clone_from(&mut self, source: &Self)
1.0.0[src]
Performs copy-assignment from source
. Read more
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]
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self
1.21.0[src]
Compares and returns the minimum of two values. Read more
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 Eq 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]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl PartialEq<Integer> for Integer
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fn eq(&self, other: &Self) -> bool
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#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl PartialEq<Unsigned> for Integer
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fn eq(&self, other: &Unsigned) -> bool
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#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
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 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,
Feeds a slice of this type into the given [Hasher
]. Read more
impl Debug for Integer
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Auto Trait Implementations
Blanket Implementations
impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = !
try_from
)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> Borrow 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,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,