Squeak-dev January 2001

squeak-dev@lists.squeakfoundation.org

112 participants
318 discussions

Squeak list wakes up again
by Henrik Gedenryd 24 Jan '01

24 Jan '01

Whoa! The list peaks back up to 55 messages in one day! I was pretty sure that someone had started a syntax thread again. So perhaps the parrot isn't really dead, it may just look that way. H

1 0

Re: Full General MIDI instrument set
by Eric Scharff 24 Jan '01

24 Jan '01

Yes, I'd be interested in anything you started with. IIRC there are some Unix MIDI players that use the GUS patches, so their source code may make up for lack of documentation. Why is there a need for a new primitive? As you say, I would think that LoopedSampledSound would be enough. -Eric

2 1

Re: C Code Generation
by Edward P Luwish 24 Jan '01

24 Jan '01

Actually my needs are simply to understand enough about Slang so as not to have any major surprises when I subclass the CCodeGenerator. I will need to test my work, and one could say that the Interpreter and plugin classes are a sufficient test. However, if Slang has features or syntax not currently used by the Interpreter, they might someday show up in a new version or in a plugin. I simply want to avoid having to rewrite my EpocCppCodeGenerator long after I have forgotten how it works. I have no intention of writing any Slang code myself - I hope I haven't left such an impression. I very much value (and follow) Bob's and Tim's advice, and, of course, yours. Thank you for contributing to my project. Ed "Andrew C. Greenberg" wrote: > At 9:23 PM -0500 1/23/01, Andrew C. Greenberg wrote: > >At 9:34 AM -0700 1/23/01, Edward P Luwish wrote: > >>Can anyone describe the subset? For those of us who need to dink with the > >>CCodeGenerator, it would be helpful to have, if not a formal syntax and > >>semantics, at least some examples of what can NOT currently be translated > >>(the Interpreter class has sufficient examples of what CAN). > > > >It is called Slang, and in view of your posting, it almost certainly > >not close to what you want. My chapter in the Squeakbook has a > >survey of the syntax and a bit of background how Slang is used, but > >I strongly suggest you take Bob and Tim's advices before spending a > >lot of time on this. Slang is *NOT* really Smalltalk -- its an > >(mostly) interpretable Smalltalk-like transliteration of imperative > >C code, highly useful for facilitating the development of C-language > >interpreters and plugins from a Smalltalk environment. > > Sorry, the URL is: > > http://coweb.cc.gatech.edu/squeakbook

1 0

C Parser
by Eric Arseneau 24 Jan '01

24 Jan '01

Does anyone know of a C parser written in Squeak that I could use ? I have some C stuff to do with Pocket Smalltalk, and I just find it too painful to deal with all functions and vars defined in a single file with an editor that is not very C aware. Unless someone can point out a useful C editor for Windoze, I'm planning to write something to help me out. Thanks all,

2 1

C Code Generation
by Geoffrey Corey 24 Jan '01

24 Jan '01

I'm delving into a new area of Squeak for me. Here is what I want to do and maybe someone on the list can tell me it I can do it. What I would like to do is take a squeak application and generate 'C' code to make a standalone exe for a target platform. For example, is it possible to take the Whisker browser and make a standalone executable? I know it sounds strange, but that is the requirement given to me. Is it possible? Is there any docs on the Net that explains this? I searched the eGroups list and the Swiki but couldn't find much info. The "?" on the CCodeGeneration class pretty much covers building a class in 'C', but I'm having difficulting grasping the big picture. Thanks in advance! -------------------------------------------------------------++ geoff corey systems development red sky >atlanta v 678.256.3443 f 678.256.3399 c 404.932.1110 http://www.redsky.com AOL IM: BluesForPablo <<Geoffrey Corey.vcf>>

5 4

[ENH] String improvement (slight)
by Andres Valloud 24 Jan '01

24 Jan '01

Hi. A small improvement in String>>withFirstCharacterDownshifted. Andres.

1 0

Mpeg source restructure
by John M McIntosh 23 Jan '01

23 Jan '01

I've consolidated the changes files and posted a new zip file for the "C" sources from feedback from Lex on building the Linux/Unix version. See http://www.smalltalkconsulting.com/html/mpeg3source.html If you already have the software loaded there isn't any changes you need from the Smalltalk change set. If you are tinkering with the "C" source code then you should get the zip file to bring your development environment upto the current structure and version. I have some tuning changes I will be posting on the "C" side of things in a few days. -- -- =========================================================================== John M. McIntosh <johnmci(a)smalltalkconsulting.com> 1-800-477-2659 Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com =========================================================================== Custom Macintosh programming & various Smalltalk dialects PGP Key: DSS/Diff/46FC3BE6 Fingerprint=B22F 7D67 92B7 5D52 72D7 E94A EE69 2D21 46FC 3BE6 ===========================================================================

1 0

RE: Plugin Security (Was Re: How do I create a SqueakPlugin.image from a 2.9a ?)
by Raab, Andreas 23 Jan '01

23 Jan '01

Luciano, Right now that would work. But there's an easy way to get around this problem by simply not exposing the pointer to the function but rather an index into a table hidden in the VM. That way you may call a different primitive but not an arbitrary location in memory. I'm looking into the issue. Cheers, - Andreas > -----Original Message----- > From: Luciano Notarfrancesco [mailto:lnotarfrancesco@yahoo.com] > Sent: Monday, January 22, 2001 7:23 PM > To: squeak(a)cs.uiuc.edu > Cc: recipient list not shown > Subject: Re: Plugin Security (Was Re: How do I create a > SqueakPlugin.image from a 2.9a ?) > > > > Removing write access to files is not enough. I think > I can manage to write to an arbitrary place of the > memory (and thus execute arbitrary code) using > #become:. And there might be other ways to do this > too... like replacing a CompiledMethod by a primitive > method with primitive 117 (externalCall) and put in > the first literal an array like described in > Interpreter|primitiveExternalCall but with the > appropiate address in the last position. I'm not sure > this will work... I never tryed it. > > Here's a challenge: find all possible ways to execute > arbitrary code from Squeak. > > Cheers, > Luciano.- > > > --- Russell Allen <russell.allen(a)firebirdmedia.com> > wrote: > > Karl Ramberg <karl.ramberg(a)chello.se> wrote: > > > Russell Allen wrote: > > > > I guess it depends whether we think people using > > the plugin will need > > > > the source - personally I would like > > SqueakPlugin.image to be a shrunked > > > > image but still be with changes and source files > > (can we shrink them > > > > too? Or offload the comments to a website > > somewhere?) > > > > > > I think there is an issue with security and > > therefor only saveing to the > > > image file is enabled. > > > > I appear to be able to read and write the entire > > directory that the > > image is in. On Windows machines this is the > > directory that all of the > > plugins are in, so theoretically I could write a > > squeaklet that deleted > > all competing plugins such as shockwave and flash :) > > > > > > Worse, I could replace them (and Squeak) with > > alternate binaries :( > > > > Even if I was only allowed to save the image, I > > could at the very least > > mount a DOS attack on the machine by filling the HD > > up with an image > > bloated with random data. > > > > Obviously in time a full security system with > > sandpits and trust levels > > would be nice; in the meantime could we disable the > > ability of > > SqueakAsPlugin to write to the local drive at all? > > (With the exception > > of automatic updates to the VM/image - maybe that > > should be done at the > > VM level? With cryptographically signed updates? :) > > > > Cheers, > > > > Russell > > > > ---------------------------------------- > > Russell Allen > > > > russell.allen(a)firebirdmedia.com > > > > ---------------------------------------- > > > > > __________________________________________________ > Do You Yahoo!? > Yahoo! Photos - 35mm Quality Prints, Now Get 15 Free! > http://photos.yahoo.com/ >

1 0

Squeak�philosophy
by daniele＠mweb.co.za 23 Jan '01

23 Jan '01

Hi, I am only starting to feel my way around in Squeak. I've read through most of the documents I could find, the squeak book, the swiki, etc. and what I keep looking for is a clearer understanding of where Squeak is heading. Not so much the features, but the philosophy behind squeak. What is the ideas that is shaping the direction Squeak is heading in? In the same breath, is there anyway I can easily get the contents of the following article: Alan Kay and Adele Goldberg. Personal Dynamic Media. IEEE Computer, March 1977, pp. 31-41. Thanks, Daniel

1 0

Re: [BUG][FIX] Rectangle>>fitInto:
by Jochen Schneider 23 Jan '01

23 Jan '01

Yes, probably came in by filing in an old change set. Sorry for triggering human and silicon bug trackers. Jochen On Tue, 23 Jan 2001, Bob Arning wrote: > It seems like something is out of sync here. I can't find > Rectangle>>fitInto: in either a 2.8 or 2.9 image. Is it perhaps > something you added locally? > > Cheers, > Bob

1 0

← Newer
1
...
9
10
11
12
13
14
15
...
32
Older →

Jump to page: