Performs a bitwise mask read operation.
An integer, created from length bits of number, beginning at start.
BitMaskRead(number, start, length)
| Parameter | Description |
|---|---|
number |
32-bit signed integer to mask |
start |
Integer, in the range 0-31, inclusive; start bit for read |
length |
Integer, in the range 0-31, inclusive; length of mask |
Bit functions operate on 32-bit signed integers, in the range -2147483648 - 2147483647.
<h3>BitMaskRead Example</h3> <p>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>