Reference documentation and code samples for the Cloud Firestore V1 Client class BitSequence.
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
.
Generated from protobuf message google.firestore.v1.BitSequence
Namespace
Google \ Cloud \ Firestore \ V1Methods
__construct
Constructor.
data
array
Optional. Data for populating the Message object.
↳ bitmap
string
The bytes that encode the bit sequence. May have a length of zero.
↳ 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.
getBitmap
The bytes that encode the bit sequence.
May have a length of zero.
string
setBitmap
The bytes that encode the bit sequence.
May have a length of zero.
var
string
$this
getPadding
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.
int
setPadding
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.
var
int
$this
