Enum Real 

pub enum Real {
    Binary {
        mantissa: f64,
        base: u32,
        exponent: i32,
        enc_base: u8,
    },
    Infinity,
    NegInfinity,
    Zero,
}

ASN.1 REAL type

Limitations

When encoding binary values, only base 2 is supported

Variants

Binary

Non-special values

Fields

mantissa: f64

base: u32

exponent: i32

enc_base: u8

Infinity

Infinity (∞).

NegInfinity

Negative infinity (−∞).

Zero

Zero

Implementations

impl Real

pub fn new(f: f64) -> Self

Create a new REAL from the f64 value.

pub const fn with_enc_base(self, enc_base: u8) -> Self

pub const fn binary(mantissa: f64, base: u32, exponent: i32) -> Self

Create a new binary REAL

pub fn is_infinite(&self) -> bool

Returns true if this value is positive infinity or negative infinity, and false otherwise.

pub fn is_finite(&self) -> bool

Returns true if this number is not infinite.

pub fn f64(&self) -> f64

Returns the ‘f64’ value of this REAL.

Returned value is a float, and may be infinite.

pub fn f32(&self) -> f32

Returns the ‘f32’ value of this REAL.

This functions casts the result of Real::f64 to a f32, and loses precision.

Trait Implementations

impl CheckDerConstraints for Real

fn check_constraints(any: &Any<'_>) -> Result<()>

impl Debug for Real

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

Formats the value using the given formatter.

impl From<Real> for f32

fn from(r: Real) -> Self

Converts to this type from the input type.

impl From<Real> for f64

fn from(r: Real) -> Self

Converts to this type from the input type.

impl From<f32> for Real

fn from(f: f32) -> Self

Converts to this type from the input type.

impl From<f64> for Real

fn from(f: f64) -> Self

Converts to this type from the input type.

impl PartialEq for Real

fn eq(&self, other: &Real) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Tagged for Real

const TAG: Tag = Tag::RealType

impl ToDer for Real

fn to_der_len(&self) -> Result<usize>

Get the length of the object (including the header), when encoded

fn write_der_header(&self, writer: &mut dyn Write) -> SerializeResult<usize>

Attempt to write the DER header to this writer.

fn write_der_content(&self, writer: &mut dyn Write) -> SerializeResult<usize>

Attempt to write the DER content (all except header) to this writer.

fn to_der_vec(&self) -> SerializeResult<Vec<u8>>

Write the DER encoded representation to a newly allocated Vec<u8>.

fn to_der_vec_raw(&self) -> SerializeResult<Vec<u8>>

Similar to using to_vec, but uses provided values without changes. This can generate an invalid encoding for a DER object.

fn write_der(&self, writer: &mut dyn Write) -> SerializeResult<usize>

Attempt to write the DER encoded representation (header and content) into this writer.

fn write_der_raw(&self, writer: &mut dyn Write) -> SerializeResult<usize>

Similar to using to_der, but uses provided values without changes. This can generate an invalid encoding for a DER object.

impl<'a, 'b> TryFrom<&'b Any<'a>> for Real

type Error = Error

The type returned in the event of a conversion error.

fn try_from(any: &'b Any<'a>) -> Result<Self>

Performs the conversion.

impl<'a> TryFrom<Any<'a>> for Real

type Error = Error

The type returned in the event of a conversion error.

fn try_from(any: Any<'a>) -> Result<Self>

Performs the conversion.

impl DerAutoDerive for Real

impl StructuralPartialEq for Real

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 24 bytes

Size for each variant:

• Binary: 23 bytes
• Infinity: 0 bytes
• NegInfinity: 0 bytes
• Zero: 0 bytes