Squeak-dev May 1998

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by Alek 09 Jun '00

09 Jun '00

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Re: Re: Float bug toolkit: what the hash is this?
by Tim Olson 31 Aug '99

31 Aug '99

>>"[1]" (10 raisedToInteger: 600) = (10.0 raisedToInteger: 800) "alt-p" >>These are equal since both expressions end up answering a float with a >>special value indicating positive infinity. Positive infinities are always >>equal. > >Nonono.... (10 raisedToInteger: 600) is anInteger, while the other (if >finished correctly) is aFloat. Correct. The problem occurs when the #= message is sent to the LargePositiveInteger with the argument a Float (+Infinity). This causes the LargePositiveInteger to be adapted to a Float (resulting in +Infinity, as well). >If aFloat turns out to be infinite, an error >should be posted. This would have to be tested in the Float primitives in the VM whenever an overflow (or NaN, I suppose) is generated. However, I *think* (VM experts correct me, here) that all they can do is fail rather than returning a succesful value, so all of the Float code that invokes primitives would have to be rewritten to test and reflect this overflow/exception failure. The IEEE "default" operation is to silently return the default values (Inf or NaN), rather than generating an exception. What should the standard for Squeak be? -- tim

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Re: Sending WinSqueak Code: Dumb but Critical Question
by guzdial＠cc.gatech.edu 26 Aug '98

26 Aug '98

>You may try the attached CrLfFileStream which automatically detects the >actual line end convention of a file. To install it for permanent use >change FileStream class>>concreteStream to return CrLfFileStream rather >than StandardFileStream. > >Hope this helps, > Andreas Works great, Andreas! Thank you! My students are filing it in as a I type... Mark -------------------------- Mark Guzdial : Georgia Tech : College of Computing : Atlanta, GA 30332-0280 (404) 894-5618 : Fax (404) 894-0673 : guzdial(a)cc.gatech.edu http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html

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st browser of Java code
by Jason Karney 02 Jun '98

02 Jun '98

Hi, Does anybody have a Java class browser for Squeak? -- Jason Karney -- NetGenics Research Team jason(a)netgenics.com [STOP] Okay, you were there yesterday, but Where do you want to go tomorrow?

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Latest updates
by Dan Ingalls 01 Jun '98

01 Jun '98

Folks - I have just put out five new updates... 064ServerSortBy-di.cs (1998.05.27 08:36:54 5,516) Supports sorting by date, name or size in remote directories. 065serversInRoot-di.cs (1998.05.27 08:36:21 8,183) Automatically includes all known servers in the root list (what you see when you choose [ ] ). Also fixes 'add server' and adds 'remove server'. Also fixes a bug that prevented one from seeing file names with spaces. Also fixes a bug that prevented looking at directories other than the leaf directory. Lets you freely go back and forth from Net to Disk. 066DebuggerFixes-wod.cs (1998.05.27 09:17:51 3,799) Bill Dargel's debugger fixes from a previous message - many thanks! 067tk-chooseServer-DG.cs (1998.05.27 08:58:34 3,148) Lets you to abort by choosing no server group when you start to load updates. 068tk-saveMorph-BG.cs (1998.05.27 08:58:45 16,079) Allows saving morphs with scripts. The unit of saving is the PasteUpMorph (i.e. Playfield). In the halo of a PasteUpMorph, in its menu, choose "playfield options...", then "save morph in file". It is OK if viewers and scripts are open at the time of saving. But, any script that is not *named* will be inaccessable later. So name you scripts before saving. I (TK) will issue a later update that explicitly asks you to name the scripts. To bring a playfield back, in the World menu, under "file...", choose "read morph(s) from file". It will come in and stick to the cursor. (We need to get a file picker in here, because we all know it is bad interface to ask the user to type an existing name.) Enjoy - Dan

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Updates 'R' Us
by Dan Ingalls 01 Jun '98

01 Jun '98

Folks - Well, you have heard about automatic code updates in Squeak 2.0. Now is your chance to try them out. If you are connected to the Internet, all you should have to do is: Start with a reasonably clean copy of 2.0, choose 'help...' from the screen menu, and then choose 'update code from server' in the next menu. After a modest delay, you should see a progress bar as each update rolls in, and then a confirmation of how many updates were received (this will depend on when you get around to trying this). You should then save a copy of this image, as it will save you time not to have to repeat this process every time you want to get a clean image. To give you a sense of how this can impact life between changes, I believe that every bug report so far since the release of 2.0 is dealt with in this first set of six changes. 058CSFileIn-di.cs Causes fileIn to recognize and save ChangeSet preambles. 059FileListScrollbarFix-di A proper fix to the erratic FileList scrollbar. 060NewServerOrg-di.cs Moves server globals into class ServerDirectory. 061MorphicPaneMenus-di Enables option menus in morphic browsers. 062DebuggerPcFix-ar.st Fixes pc selection during debugger step. 063aboutSystemFix-tao Makes aboutThisSystem work when you have no updates (which won't be so after the update but, oh, well...;-) The update facility is primarily the work of Ted Kaehler, although it owes much to the underlying socket support built a while back by John Maloney. - Dan

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Another reason I like Squeak: Introspection
by Tim Olson 31 May '98

31 May '98

It's wonderful that the Squeak sources are fully open and easily browsable. But even more than that, Squeak's runtime is open to browsing (and possible modification) through introspection. Normally introspection is reserved for things like Debuggers, but here's a case where I used the facility to my advantage: I needed to FTP a fairly large file from a server. Since I was working in Squeak at the time, I figured I would do the FTP in Squeak, writing out the contents to a file when it was complete. A couple minutes later, after browsing the FTPSocket sources, I had an FTP process running in the background. After it had been running for a bit, I realized that it would be nice to have some sort of visual indication of the FTP progress. However, a) I didn't want to clutter up the existing FTPSocket code with a progress display (*), and b) I didn't want to stop and restart the transfer, in any case. Looking again at the FTPSocket sources, I discovered that what I wanted was the position of the stream stored in the temporary variable 'response' in the method #getAllDataWhileWatching: Since *everything* in Squeak is an object, including the runtime contexts of the various running processes, I was able to do the following on the already running ftpProc: ctxt := ftpProc suspendedContext. [ctxt method == (FTPSocket compiledMethodAt: #getAllDataWhileWatching:)] whileFalse: [ctxt := ctxt sender]. This followed up the ftpProc's context chain until it found the context which was executing in the #getAllDataWhileWatching: method. Then, to get the value of the 'response' temporary variable in that context, I executed: resp := ctxt tempAt: (ctxt tempNames indexOf: 'response'). Then all I needed to do was periodically send 'position' to the resp stream to find out how much data had been transferred: oldSize := newSize := 0. 'FTP status:' displayProgressAt: (Display width - 96) @ 64 from: 0 to: ftpSize during: [:bar | oldSize := newSize. newSize := resp position. [oldSize ~= newSize] whileTrue: [bar value: newSize. (Delay forSeconds: 30) wait]]. (*) after succesfully doing this, I started thinking about the user-interface ramifications of String>>displayProgressAt: It's a handy thing, but it puts the user at the whim of the person who coded it in, and since it is statically associated with the method, rather than some dynamic form of progress display control, if it isn't what the caller wants displayed, it can't easily be modified. For example, the recent suggestions that the automatic server update progress show the progress of the entire transfer, rather than the individual streams. I wonder if some form of dynamic registry for progress indication, perhaps something like how error handling is registered, might be something to explore. -- tim

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Low-end Squeak Experiment
by Helge Horch 31 May '98

31 May '98

[I wrote this a week ago, but the list wouldn't let me post it. Obviously solved.] Hi all, This afternoon I have - just for the fun of it - tried to generate a Squeak for low-end Macs. Well, I wouldn't call it a success yet. :-) I have a Powerbook-100 (16MHz 68000 4MB) and a Mac SE with a Railgun card (20?MHz 68030 4MB) sitting here, both executing - at post-glacial resp. slightly-annoying speed - a majorShrinked version of 1.31. I had to massage the VM sources quite a bit, since the ancient systems 7.1 and 7.0t don't know about all the modern stuff. Plus, I had to use MPW 3.2 to do it. (*On* the Powerbook. Sigh.) Now for my question: Since neither machine knows Color-Quickdraw, I had to throw out the PixMap and ColorTable stuff and replaced it with BitMaps. (The shrunken image was saved by a helpful NT machine in 1-bit display mode.) It *does* come up okay on both machines, *but* 1) it won't collapse nor expand windows, (just go asleep for awhile) 2) it won't open new windows (see 1), although it 3) will close windows just perfectly. I know this isn't the main (or even the remote) direction Squeak is moving, but I'd appreciate any hints on where I failed to see the obvious. Since I'm not sure whether this is a topic of general interest, I'd suggest direct mail, but I'm also reading the list of course. Nice weekend, everybody, Helge -- "Ich habe fertig." -- G. T. http://netsurf.citylink.de/users/hhorch/ 31ec 162e 4088 a228 6c6e 84bd 7ef0 026f 25f2 e590

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Jitter 2.0 for Macs?
by Mark Guzdial 30 May '98

30 May '98

I couldn't find a Jitter VM 2.0 for Macs anywhere. Is it the same as the 1.31 Jitter? Or do we need to generate the source and recompile it? Thanks! Mark -------------------------- Mark Guzdial : Georgia Tech : College of Computing : Atlanta, GA 30332-0280 (404) 894-5618 : Fax (404) 894-0673 : guzdial(a)cc.gatech.edu http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html

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Squeak 2.0 trouble? (on Mac)
by nishis＠urban.ne.jp 30 May '98

30 May '98

Hello, I have a question about 2.0 for Mac. After downloading, plain vanilla setting, my browser missed first character of some methods of some classes... ex) StringHolderView>>deEmphasizeView eEmphasizeView (snipped) StringHolder>>browseMethodFull rowseMethodFull (snipped) SystemDictinary>>snapshot:andQuit: napshot: save andQuit: quit (snipped) It doesn't seems on Windwos95 version. How can I fix it? regards, ------------------------------------------- 西原聡士 (NISHIHARA Satoshi) e-mail: nishis(a)urban.ne.jp : tcc00164(a)niftyserve.or.jp URL: http://www.urban.ne.jp/home/nishis/ -------------------------------------------

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