BsonDecimal128 class

format 1° bit sign (0 positive - 1 negative) (S) 17 2°-18° Combination field (G)

• If G0 through G4 are 11111, then the value is NaN regardless of the sign.
  • Furthermore, if G5 is 1, then r is sNaN;otherwise r is qNaN. The remaining bits of G are ignored, and T constitutes the NaN’s payload,which can be used to distinguish various NaNs.
• If G0 through G4 are 11110 then r and value = (−1)^S×(+∞). The values of the remaining bits in G, andT, are ignored. The two canonical representations of infinity have bits G5 through G16 = 0, and T = 0.
• For finite numbers, r is (S, E−bias, C) and value = (−1)^S×10^(E−bias)×C, where C is the concatenation of the leading significand digit or bits from the combination field G and the trailing significand field T, and where the biased exponent E is encoded in the combination field.
  • If G0 and G1 together are one of 00, 01, or 10, then the biased exponent E is formed from G0 through G13 (Gw+1) and the significand is formed from bits G14 (Gw+2) through the end of the encoding (including T).
  • If G0 and G1 together are 11 and G2 and G3 together are one of 00, 01, or 10, then the biased exponent E is formed from G2 through G15 (Gw+3) and the significand is formed by prefixing the 4 bits "100 + G16" (8+Gw+4) to T. 110 19°-128° trailing significand field (T)

Inheritance

• Object
• BsonObject
• BsonDecimal128

Constructors

BsonDecimal128(Rational? rational)

BsonDecimal128.fromBsonBinary(BsonBinary bin)

BsonDecimal128.fromBuffer(BsonBinary buffer)

BsonDecimal128.fromHexString(String hexString)

factory

Properties

bin ↔ BsonBinary

getter/setter pair

hashCode → int

The hash code for this object.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

typeByte → int

no setter, override

value → Rational?

no setter, override

Methods

byteLength() → int

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

packElement(String? name, BsonBinary buffer) → void

inherited

packValue(BsonBinary buffer) → void

override

toHexString() → String

toJson() → String

toString() → String

A string representation of this object.

override

unpackValue(BsonBinary buffer) → void

override

Operators

operator ==(Object other) → bool

The equality operator.

override

Static Methods

convertBinaryToRational(BsonBinary binary) → Rational?

convertRationalToBinary(Rational? rational) → BsonBinary

extractData(BsonBinary buffer) → BsonBinary

extractExponent(String valueString) → int

extractSignificand(String valueString) → Rational

parse(String hexString) → BsonDecimal128

removeTrailingZeros(String valueString) → String