From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: ludo@gnu.org (Ludovic =?iso-8859-1?Q?Court=E8s?=) Newsgroups: gmane.lisp.guile.devel Subject: Re: review/merge request: wip-array-refactor Date: Thu, 13 Aug 2009 11:16:09 +0200 Message-ID: <87k5185b1i.fsf@gnu.org> References: <874ot48k4h.fsf@arudy.ossau.uklinux.net> <87k51pyj0c.fsf@arudy.ossau.uklinux.net> <87bpmpvt14.fsf@gnu.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1250155005 16852 80.91.229.12 (13 Aug 2009 09:16:45 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 13 Aug 2009 09:16:45 +0000 (UTC) To: guile-devel@gnu.org Original-X-From: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Thu Aug 13 11:16:38 2009 Return-path: Envelope-to: guile-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1MbWQG-00077L-8x for guile-devel@m.gmane.org; Thu, 13 Aug 2009 11:16:36 +0200 Original-Received: from localhost ([127.0.0.1]:40074 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MbWQD-00032t-Fi for guile-devel@m.gmane.org; Thu, 13 Aug 2009 05:16:33 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MbWQ9-00030u-8y for guile-devel@gnu.org; Thu, 13 Aug 2009 05:16:29 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MbWQ4-0002st-I1 for guile-devel@gnu.org; Thu, 13 Aug 2009 05:16:28 -0400 Original-Received: from [199.232.76.173] (port=40208 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MbWQ4-0002sg-BS for guile-devel@gnu.org; Thu, 13 Aug 2009 05:16:24 -0400 Original-Received: from main.gmane.org ([80.91.229.2]:54924 helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MbWQ3-0000dV-U8 for guile-devel@gnu.org; Thu, 13 Aug 2009 05:16:24 -0400 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1MbWPz-0001D9-EU for guile-devel@gnu.org; Thu, 13 Aug 2009 09:16:20 +0000 Original-Received: from laptop-147-210-128-170.labri.fr ([147.210.128.170]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 13 Aug 2009 09:16:19 +0000 Original-Received: from ludo by laptop-147-210-128-170.labri.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 13 Aug 2009 09:16:19 +0000 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 37 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: laptop-147-210-128-170.labri.fr X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 26 Thermidor an 217 de la =?iso-8859-1?Q?R=E9volutio?= =?iso-8859-1?Q?n?= X-PGP-Key-ID: 0xEA52ECF4 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 821D 815D 902A 7EAB 5CEE D120 7FBA 3D4F EB1F 5364 X-OS: x86_64-unknown-linux-gnu User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) Cancel-Lock: sha1:NAoTX4Siwv7e60SwxlwSBN1GwRg= X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) X-BeenThere: guile-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Developers list for Guile, the GNU extensibility library" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Errors-To: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.devel:9098 Archived-At: Hi Andy! Andy Wingo writes: > On Sun 09 Aug 2009 18:41, ludo@gnu.org (Ludovic Courtès) writes: > >> Andy Wingo writes: [...] >>> I've written lots of code that deals with srfi-4 vectors. I have three >>> kinds of use cases. First is data being shoved around in a >>> dynamically-typed system: dbus messages, gconf values, a system we >>> at work, etc. Second, but related, is dealing with chunks of data that >>> come from elsewhere, like GDK pixbufs, or GStreamer buffers. Third is >>> hacking compilers, as in Guile itself, or emitting machine code for >>> other machines. [...] >> SRFI-4 is a good fit for the 2nd use case as you're dealing with >> fixed-width native-endianness numbers coming from C code. > > Agreed, modulo the possibility for this data to be embedded within some > other stream. > >> But in this case, I don't think bytevectors are needed at all. > > I think they are needed whenever you want to *do* something with this > data -- i/o for example. In the 2nd use case (GDK pixbufs, GStreamer buffers), I suppose you don't do I/O with the data; it just travels back and forth between C and Scheme code. Is this correct? Thanks, Ludo'.