From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-2.9 required=5.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=unavailable autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,70ff6d6e203062f6 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2003-12-23 01:10:45 PST Path: archiver1.google.com!news2.google.com!news.maxwell.syr.edu!newsfeed.media.kyoto-u.ac.jp!newsfeed.icl.net!newsfeed.fjserv.net!proxad.net!usenet-fr.net!enst.fr!melchior!cuivre.fr.eu.org!melchior.frmug.org!not-for-mail From: Stephen Leake Newsgroups: comp.lang.ada Subject: Re: Newbie question: How does one do bit manipulation in Ada? Date: 23 Dec 2003 04:09:21 -0500 Organization: Cuivre, Argent, Or Message-ID: References: NNTP-Posting-Host: lovelace.ada-france.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: melchior.cuivre.fr.eu.org 1072170575 76955 80.67.180.195 (23 Dec 2003 09:09:35 GMT) X-Complaints-To: usenet@melchior.cuivre.fr.eu.org NNTP-Posting-Date: Tue, 23 Dec 2003 09:09:35 +0000 (UTC) To: comp.lang.ada@ada-france.org Return-Path: In-Reply-To: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 X-Virus-Scanned: by amavisd-new-20030616-p5 (Debian) at ada-france.org X-BeenThere: comp.lang.ada@ada-france.org X-Mailman-Version: 2.1.3 Precedence: list List-Id: Gateway to the comp.lang.ada Usenet newsgroup List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Xref: archiver1.google.com comp.lang.ada:3740 Date: 2003-12-23T04:09:21-05:00 Peter C.Chapin writes: > I'm a C/C++ programmer in the process of teaching myself Ada. I've been > writing toy programs to get a feeling for the language. There is > obviously a lot to learn, but I'm enjoying myself. Good to hear! > Anyway, I have a need to do some bit manipulations in one of my > programs. In particular I want to invert certain bits in a number > (integer). Others have told you how to do this using XOR. I'd like to point out that Ada often has better ways to accomplish things that are done with bit-fiddling in other languages. So if you can explain why you need to invert those bits, we might be able to give you a better way to accomplish the same thing. For example, specifying the exact position of bits in registers is much simpler in Ada than in C. -- -- Stephe