Struct google_firestore1_beta1::api::BitSequence
source · pub struct BitSequence {
pub bitmap: Option<Vec<u8>>,
pub padding: Option<i32>,
}
Expand description
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
.
This type is not used in any activity, and only used as part of another schema.
Fields§
§bitmap: Option<Vec<u8>>
The bytes that encode the bit sequence. May have a length of zero.
padding: Option<i32>
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.
Trait Implementations§
source§impl Clone for BitSequence
impl Clone for BitSequence
source§fn clone(&self) -> BitSequence
fn clone(&self) -> BitSequence
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
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