Aerospike

Module: aerospike/bitwise

This module defines bitwise operations on the Bytes data type. The operations are executed using the Client#operate command.

Offset orientation is left-to-right. Negative offsets are supported. If the offset is negative, the offset starts backwards from end of the bitmap. If an offset is out of bounds, a parameter error will be returned.

For more information, please refer to the ⇑Bytes Data Type and ⇑Bitwise Operations documentation in the Aerospike Feature Guide.

Bitwise operations require Aerospike Server 4.6.0 or later.

Since:
  • v3.13.0
Source:
See:

Classes

BitwiseOperation
OverflowableBitwiseOp

Members

<static> overflow :Object

Bitwise overflow action.

Action to take when a bitwise add/subtract operation results in overflow/underflow.

Type:
  • Object
Properties:
Name Type Description
FAIL number

Fail operation with error. Default.
SATURATE number

If add/subtract overflows/underflows, set to max/min value. Example: MAXINT + 1 = MAXINT.
WRAP number

If add/subtract overflows/underflows, wrap the value. Example: MAXINT + 1 = -1.
Source:

<static> resizeFlags :Object

Bitwise resize flags.

Type:
  • Object
Properties:
Name Type Description
DEFAULT number

Default.
FROM_FRONT number

Add/remove bytes from the beginning instead of the end.
GROW_ONLY number

Only allow the bitmap size to increase.
SHRINK_ONLY number

Only allow the bitmap size to decrease.
Source:

<static> writeFlags :Object

Bitwise write flags.

Type:
  • Object
Properties:
Name Type Description
DEFAULT number

Allow create or update. Default.
CREATE_ONLY number

If the bin already exists, the operation will be denied. If the bin does not exist, a new bin will be created.
UPDATE_ONLY number

If the bin already exists, the bin will be overwritten. If the bin does not exist, the operation will be denied.
NO_FAIL number

Do not raise error if operation is denied.
PARTIAL number

Allow other valid operations to be committed if this operations is denied due to flag constraints.
Source:
See:

Methods

<static> add(bin, bitOffset, bitSize, value, sign)

Create bit "add" operation.

Server adds value to bitmap. Server does not return a value.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits; must be <= 64.
value number

Value to add.
sign boolean

Sign indicates if bits should be treated as a signed number.
Source:
See:
  • OverflowableBitwiseOp#onOverflow can used to control how the operation executes, when the addition results in an overflow/underflow.
Returns:

Operation that can be passed to the Client#operate command.

Type
OverflowableBitwiseOp

<static> and(bin, bitOffset, bitSize, value)

Create bit "and" operation.

Server performs bitwise "and" on value and bitmap. Server does not return a value.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits.
value Buffer

Value.
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> get(bin, bitOffset, bitSize)

Create bit "get" operation.

Server returns bits from bitmap.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits to return.
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> getInt(bin, bitOffset, bitSize, sign)

Create bit "get integer" operation.

Server returns integer from bitmap.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits to return.
sign boolean

Sign indicates if bits should be treated as a signed.
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> insert(bin, offset, value)

Create byte "insert" operation.

Server inserts value bytes into bitmap. Server does not return a value.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
offset number

Offset in bytes.
value Buffer

Bytes to insert.
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> lscan(bin, bitOffset, bitSize, value)

Create bit "left scan" operation.

Server returns integer bit offset of the first specified value bit in bitmap.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits.
value boolean

value to scan for, "0" (false) or "1" (true).
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> lshift(bin, bitOffset, bitSize, shift)

Create bit "left shift" operation.

Server shifts left bitmap. Server does not return a value.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits to shift.
shift number

Distance to shift bits.
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> not(bin, bitOffset, bitSize)

Create bit "not" operation.

Server negates bitmap. Server does not return a value.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits.
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> or(bin, bitOffset, bitSize, value)

Create bit "or" operation.

Server performs bitwise "or" on value and bitmap. Server does not return a value.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits.
value Buffer

Value.
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> remove(bin, byteOffset, byteSize)

Create byte "remove" operation.

Server removes bytes from bitmap. Server does not return a value.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
byteOffset number

Offset in bytes.
byteSize number

Number of bytes to remove
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> resize(bin, size [, flags])

Create byte "resize" operation.

Server resizes bitmap to byte size according to flags. Server does not return a value.

Parameters:
Name Type Argument Default Description
bin string

The name of the bin. The bin must contain a byte value.
size number

Number of bytes to resize the byte value to.
flags number <optional>
 bitwise.resizeFlags.DEFAULT

Optional resize flags.
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> rscan(bin, bitOffset, bitSize, value)

Create bit "right scan" operation.

Server returns integer bit offset of the last specified value bit in bitmap.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits.
value boolean

value to scan for, "0" (false) or "1" (true).
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> rshift(bin, bitOffset, bitSize, shift)

Create bit "right shift" operation.

Server shifts right bitmap. Server does not return a value.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits to shift.
shift number

Distance to shift bits.
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> set(bin, bitOffset, bitSize, value)

Create bit "set" operation.

Server sets value on bitmap. Server does not return a value.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits to set.
value number | Buffer

Value to set.
Source:
Throws:

TypeError unless value is an integer or a Buffer.

Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation

<static> subtract(bin, bitOffset, bitSize, value, sign)

Create bit "subtract" operation.

Server subtracts value from bitmap. Server does not return a value.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits; must be <= 64.
value number

Value to subtract.
sign boolean

Sign indicates if bits should be treated as a signed number.
Source:
See:
  • OverflowableBitwiseOp#onOverflow can used to control how the operation executes, when the addition results in an overflow/underflow.
Returns:

Operation that can be passed to the Client#operate command.

Type
OverflowableBitwiseOp

<static> xor(bin, bitOffset, bitSize, value)

Create bit "exclusive or" operation.

Server performs bitwise "xor" on value and bitmap. Server does not return a value.

Parameters:
Name Type Description
bin string

The name of the bin. The bin must contain a byte value.
bitOffset number

Offset in bits.
bitSize number

Number of bits.
value Buffer

Value.
Source:
Returns:

Operation that can be passed to the Client#operate command.

Type
BitwiseOperation