The following module was proposed for inclusion in the Module List:
modid: Data::BitMask
DSLIP: RdpOa
description: Bitmask manipulation
userid: TEVERETT (Toby Ovod-Everett)
chapterid: 6 (Data_Type_Utilities)
communities:
similar:
rationale:
Namespace choice was recommended by Tim Bunce
(http://www.xray.mpe.mpg.de/mailing-lists/modules/2003-08/msg00342.html).
Using C-style constants (i.e. global or semi-global values or
subroutines) is a bad approach to supporting bitmasks in modules for
a number of reasons. First, it allows for inaccurate specification
of bitmasks (i.e. allowing the use of constants authorized for a
given situation in other situations where the constant does not
accurately describe the bitmask in question), causing potential
problems in code maintenance. Second, it provides no easy way to
break a bitmask back into its constituent constants. Third, it
relies upon the user to do all of the bitmask manipulation. Many
module users do not have a solid understanding of the bitwise
operations necessary to do the manipulation properly, which can lead
to bugs in code.
This module attempts to address all of those concerns.
enteredby: TEVERETT (Toby Ovod-Everett)
enteredon: Sun Sep 7 16:55:06 2003 GMT
The resulting entry would be:
Data::
::BitMask RdpOa Bitmask manipulation TEVERETT
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