User Guide

282 CFML Language Reference

BitMaskClear

Returns number bitwise cleared with length bits beginning from start.

See also BitMaskRead and BitMaskSet.

Syntax BitMaskClear(

number

start

length

)

number

Long integer to be masked.

start

Integer specifying the starting bit for masking.

length

Integer specifying the length of mask.

Usage Parameters start and length must be in the range from 0 to 31.

Bit functions operate on 32-bit integers.

Examples

<HTML>

<HEAD>

<TITLE>BitMaskClear Example</TITLE>

</HEAD>

<BODY>

<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>

</BODY>

</HTML>