From: ebresie@usa.net
Subject: Bit operations in Ada (one's complements and sum)
Date: Fri, 08 Sep 2000 23:34:03 GMT
Date: 2000-09-08T23:34:03+00:00 [thread overview]
Message-ID: <8pbt1a$vo8$1@nnrp1.deja.com> (raw)
I am curious if there exists either built in or already developed
somewhere, a bit manipulation package.
I am trying to have 16-bit numbers that are made into one's complement
and have one's complement summation occur with the values.
I started working on some of it, but thought I would check to see if
maybe this functionality already exists somewhere in ADA95 or exists
somewhere (one of the things about ADA is reusablility right :-)
I am not an expert of package development so any help would be
appreciated.
I started thinking that I would have something along the lines of:
package Bits is
-- I was thinking of using an array of Booleans but wasn't sure if this
-- was the most efficient way of working with Bits.
type BIT_String is new String;
type Ones_Complement is new BIT_String;
type Twos_Complement is new BIT_String;
function Ones_Complement( N : Integer ) return BIT_String;
function Twos_Complement( N : Integer ) return BIT_String;
function "+"( Left: Ones_Complement; Right : Twos_Complement ) return
Ones_Complement;
function "+"( Left: Twos_Complement; Right : Twos_Complement ) return
Twos_Complement;
end Bits
The implementation I haven't completed yet...but figured I would check
with you guys first.
The implementation basically would take the Integer, check for negative
value, store a 1 for negative/0 for postive, then div/mod by two to get
each bit place.
I guess I should be able to somehow make this seperate from the
data type Integer and make it more abstract...how is the best way to do
that?
I am I just making this harder then I need to?
Any help would be appreciated
Eric Bresie
ebresie@usa.net
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next reply other threads:[~2000-09-08 23:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-09-08 23:34 ebresie [this message]
2000-09-09 0:01 ` Bit operations in Ada (one's complements and sum) Ted Dennison
2000-09-09 5:22 ` Epistemology [was: Bit operations in Ada (one's complements and sum)] Nick Roberts
2000-09-09 20:18 ` Robert Dewar
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