BitMaskClear |
Description
Performs a bitwise mask clear operation.
Returns
A number, bitwise cleared, with length bits beginning at start.
Category
Mathematical functions
Function syntax

    BitMaskClear(number, start, length)

See also
BitMaskRead, BitMaskSet
Parameters

Parameter | Description
number | 32-bit signed integer
start | Integer, in the range 0-31, inclusive; start bit for mask
length | Integer, in the range 0-31, inclusive; length of mask

Usage
Bit functions operate on 32-bit signed integers, in the range -2147483648 - 2147483647.

Example

    <h3>BitMaskClear Example</h3>

    <p>Returns number bitwise cleared with length bits beginning from start.

    <p>BitMaskClear(255, 4, 4): <cfoutput>#BitMaskClear(255, 4, 4)#
    </cfoutput>
    <p>BitMaskClear(255, 0, 4): <cfoutput>#BitMaskClear(255, 0, 4)#
    </cfoutput>
    <p>BitMaskClear(128, 0, 7): <cfoutput>#BitMaskClear(128, 0, 7)#
    </cfoutput>

number |
32-bit signed integer

start |
Integer, in the range 0-31, inclusive; start bit for mask

length |
Integer, in the range 0-31, inclusive; length of mask