BitSequence class final

A sequence of bits, encoded in a byte array.

Each byte in the bitmap byte array stores 8 bits of the sequence. The only exception is the last byte, which may store 8 or fewer bits. The padding defines the number of bits of the last byte to be ignored as "padding". The values of these "padding" bits are unspecified and must be ignored.

To retrieve the first bit, bit 0, calculate: (bitmap[0] & 0x01) != 0. To retrieve the second bit, bit 1, calculate: (bitmap[0] & 0x02) != 0. To retrieve the third bit, bit 2, calculate: (bitmap[0] & 0x04) != 0. To retrieve the fourth bit, bit 3, calculate: (bitmap[0] & 0x08) != 0. To retrieve bit n, calculate: (bitmap[n / 8] & (0x01 << (n % 8))) != 0.

The "size" of a BitSequence (the number of bits it contains) is calculated by this formula: (bitmap.length * 8) - padding.

Constructors

BitSequence({Uint8List? bitmap, int padding = 0})

BitSequence.fromJson(Object? j)

factory

Properties

bitmap → Uint8List

The bytes that encode the bit sequence. May have a length of zero.

final

hashCode → int

The hash code for this object.

no setter, inherited

padding → int

The number of bits of the last byte in bitmap to ignore as "padding". If the length of bitmap is zero, then this value must be 0. Otherwise, this value must be between 0 and 7, inclusive.

final

qualifiedName → String

The fully qualified name of this message, i.e., google.protobuf.Duration or google.rpc.ErrorInfo.

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toJson() → Object

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

fullyQualifiedName → const String