bitMaskRead
Description
Performs a bitwise mask read operation.
Categories
Related
Syntax
BitMaskRead(number, start, length)
Attributes
| Attribute | Description | Required | Default |
|---|---|---|---|
| length | Integer, in the range 0-31, inclusive; length of mask | ||
| number | 32-bit signed integer to mask | ||
| start | Integer, in the range 0-31, inclusive; start bit for read |
Returns
An integer,
created from length bits of number, beginning at start.
Usage
Bit functions operate on 32-bit signed integers, in the range -2147483648 – 2147483647.
Example
<h3>BitMaskRead Example</h3>
Returns integer created from <em>length</em> bits of <em>number</em>, beginning
with <em>start</em>.</p>
BitMaskRead(255, 4, 4): <cfoutput>#BitMaskRead(255, 4, 4)#</cfoutput></p>
BitMaskRead(255, 0, 4): <cfoutput>#BitMaskRead(255, 0, 4)#</cfoutput></p>
BitMaskRead(128, 0, 7): <cfoutput>#BitMaskRead(128, 0, 7)#</cfoutput></p>