Squeak-dev September 1998

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Re: Unsubscribing
by Aibek Musaev 29 Sep '98

29 Sep '98

To unsubscribe send a message to squeak-request(a)cs.uiuc.edu with the subject of "unsubscribe".

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Re: Simple Question
by Randal Schwartz 28 Sep '98

28 Sep '98

>>>>> "Jarvis," == Jarvis, Robert P <Jarvisb(a)timken.com> writes: Jarvis,> [ aFileStream atEnd = false ] whileTrue: [ Jarvis,> anOtherFileStream nextPut: (aFileStream next) ]. Error: "[ blah = false ] whileTrue: [ blah2 ]" better written as: "[ blah ] whileFalse: [ blah2 ]" in line 3 :-) -- Name: Randal L. Schwartz / Stonehenge Consulting Services (503)777-0095 Keywords: Perl training, UNIX[tm] consulting, video production, skiing, flying Email: <merlyn(a)stonehenge.com> Snail: (Call) PGP-Key: (finger merlyn(a)teleport.com) Web: <A HREF="http://www.stonehenge.com/merlyn/">My Home Page!</A> Quote: "I'm telling you, if I could have five lines in my .sig, I would!" -- me

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Arrrgh...Mini Squeak FTP directory name contains spaces
by David Mitchell 28 Sep '98

28 Sep '98

Note: Please don't deride me for not having a better FTP client as I am at work and IE is sanctioned. I cannot get to the new Mini Squeak Directories below SmallSqueaksForPDAs using IE because it trims the directory name at the first space. So I get: /pub/Smalltalk/Squeak/SmallSqueaksForPDAs/Mini: no such file or directory I've tried a number of quoting options, but still no luck. Would it be possible to rename the directories to not use spaces? -- On Sun, 27 Sep 1998 14:22:08 Dan Ingalls wrote: >>I have set up a directory structure on the UIUC server >> Small Squeaks for PDAs [ ] >> Mini Squeak 1.2 [ ] >> See_Elsewhere_Under_wince >> Mini Squeak 2.2 [ ] >> MakeYourOwn [ ] >> ...the files I used to make mini.image >> Mini.image -- 656k >> Mini.changes -- 1k > >P.S. I went back and looked at the old 1.2 mini image, and found that it was only 632k :-( >Then I set the display depth of the 2.2 mini image to 1 (which 1.2 was), and got 631k ;-) > > > -----== Sent via Deja News, The Discussion Network ==----- http://www.dejanews.com/ Easy access to 50,000+ discussion forums

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RE: Arrrgh...Mini Squeak FTP directory name contains spaces
by David Mitchell 28 Sep '98

28 Sep '98

I am using NT, but I am behind a firewall. I get a not connected message. Thanks anyway. -- On Mon, 28 Sep 1998 13:29:30 Jarvis, Robert P. wrote: >If you're using NT you might try the command-line FTP program which >comes with the OS. Try the following: > > 1. At a command line prompt type > ftp > > 2. Type > user anonymous(a)st.cs.uiuc.edu > > 3. Once you're connected type the following command > with an Enter or Return after each line: > cd pub > cd Smalltalk > cd Squeak > cd SmallSqueaksForPDAs > cd "Mini Squeak 2.2" > > 4. Switch to binary mode ("binary" at the ftp command > line) and use the "get" command to grab the files > you want. > >I'm not sure if Win95/Win98 come with a command-line FTP program, >but they may. I hope this helps. > >Bob Jarvis >The Timken Company > >>-----Original Message----- >>From: David Mitchell [SMTP:david_mitchell@my-dejanews.com] >>Sent: Monday, September 28, 1998 12:54 PM >>To: squeak(a)cs.uiuc.edu >>Subject: Arrrgh...Mini Squeak FTP directory name contains spaces >> >>Note: Please don't deride me for not having a better FTP client as I am at >>work and IE is sanctioned. >> >>I cannot get to the new Mini Squeak Directories below SmallSqueaksForPDAs >>using IE because it trims the directory name at the first space. So I get: >> >>/pub/Smalltalk/Squeak/SmallSqueaksForPDAs/Mini: no such file or directory >> >>I've tried a number of quoting options, but still no luck. >> >>Would it be possible to rename the directories to not use spaces? >> >>-- >> >>On Sun, 27 Sep 1998 14:22:08 Dan Ingalls wrote: >>>>I have set up a directory structure on the UIUC server >>>> Small Squeaks for PDAs [ ] >>>> Mini Squeak 1.2 [ ] >>>> See_Elsewhere_Under_wince >>>> Mini Squeak 2.2 [ ] >>>> MakeYourOwn [ ] >>>> ...the files I used to make mini.image >>>> Mini.image -- 656k >>>> Mini.changes -- 1k >>> >>>P.S. I went back and looked at the old 1.2 mini image, and found that it >>>was only 632k :-( >>>Then I set the display depth of the 2.2 mini image to 1 (which 1.2 was), and >>>got 631k ;-) >>> >>> >>> >> >> >>-----== Sent via Deja News, The Discussion Network ==----- >>http://www.dejanews.com/ Easy access to 50,000+ discussion forums > > -----== Sent via Deja News, The Discussion Network ==----- http://www.dejanews.com/ Easy access to 50,000+ discussion forums

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RE: Arrrgh...Mini Squeak FTP directory name contains spaces
by Jarvis, Robert P. 28 Sep '98

28 Sep '98

If you're using NT you might try the command-line FTP program which comes with the OS. Try the following: 1. At a command line prompt type ftp 2. Type user anonymous(a)st.cs.uiuc.edu 3. Once you're connected type the following command with an Enter or Return after each line: cd pub cd Smalltalk cd Squeak cd SmallSqueaksForPDAs cd "Mini Squeak 2.2" 4. Switch to binary mode ("binary" at the ftp command line) and use the "get" command to grab the files you want. I'm not sure if Win95/Win98 come with a command-line FTP program, but they may. I hope this helps. Bob Jarvis The Timken Company >-----Original Message----- >From: David Mitchell [SMTP:david_mitchell@my-dejanews.com] >Sent: Monday, September 28, 1998 12:54 PM >To: squeak(a)cs.uiuc.edu >Subject: Arrrgh...Mini Squeak FTP directory name contains spaces > >Note: Please don't deride me for not having a better FTP client as I am at >work and IE is sanctioned. > >I cannot get to the new Mini Squeak Directories below SmallSqueaksForPDAs >using IE because it trims the directory name at the first space. So I get: > >/pub/Smalltalk/Squeak/SmallSqueaksForPDAs/Mini: no such file or directory > >I've tried a number of quoting options, but still no luck. > >Would it be possible to rename the directories to not use spaces? > >-- > >On Sun, 27 Sep 1998 14:22:08 Dan Ingalls wrote: >>>I have set up a directory structure on the UIUC server >>> Small Squeaks for PDAs [ ] >>> Mini Squeak 1.2 [ ] >>> See_Elsewhere_Under_wince >>> Mini Squeak 2.2 [ ] >>> MakeYourOwn [ ] >>> ...the files I used to make mini.image >>> Mini.image -- 656k >>> Mini.changes -- 1k >> >>P.S. I went back and looked at the old 1.2 mini image, and found that it >>was only 632k :-( >>Then I set the display depth of the 2.2 mini image to 1 (which 1.2 was), and >>got 631k ;-) >> >> >> > > >-----== Sent via Deja News, The Discussion Network ==----- >http://www.dejanews.com/ Easy access to 50,000+ discussion forums

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Windoze-2-1-4 renamed
by Sam Adams 28 Sep '98

28 Sep '98

Squeakers, I have recently renamed Windoze-2-1-4.cs to Windoze-2-1-1.cs on the UIUC server to correct a version naming error on my part. The current URL is ftp://st.cs.uiuc.edu/Smalltalk/Squeak/Goodies/Windoze-2-1-1.cs Regards, Sam Sam S. Adams, Distinguished Engineer, IBM Network Computing Software Division tie line 444-0736, outside 919-254-0736, email: ssadams(a)us.ibm.com <<Hebrews 11:6, Proverbs 3:5-6, Romans 1:16-17, I Corinthians 1:10>>

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ANSI compatibility
by Pennell's 28 Sep '98

28 Sep '98

Dan Ingalls has comitted to work with the Squeak community to incorporate a "Top 10 list of features to aid porting from other dialects" into Squeak. I'm soliciting ideas about what should be on the list and and code/volunteers to implement the feature. I think we should favor ANSI compatibility, but as stated above, the primary goal is to make porting code from other dialects as painless as possible. Please send me your responses OFFLINE to pennell(a)tiac.net and I'll publish a summary on the list. I'll start with my list: 1. Exceptions VSExceptions and a PPS exceptions package are both available on the net. Comments on applicability? How do we accomadate the two popular models? 2. Finalization Andreas Raab has code (changes VM) for WeakArrays at his site. This is planned for inclusion in Squeak 2.3. What else do we need here? 3. Block Closures There has been lots of discussion about this on the list. Rumor has it that somebody has done most/all of the work. 4. Reserved values in literal arrays (#nil or nil) #(nil true false) should return an array with instances of UndefinedValue, True and False -david

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Re: Toward a great Mini Squeak for PDA's
by ohshima＠is.titech.ac.jp 28 Sep '98

28 Sep '98

Hello. > P.S. I went back and looked at the old 1.2 mini image, and found that it was only 632k :-( > Then I set the display depth of the 2.2 mini image to 1 (which 1.2 was), and got 631k ;-) I just "made my own" mini image for my Zaurus port and it worked (basically) fine on the 2.1 based VM. OHSHIMA Yoshiki Dept. of Mathematical and Computing Sciences Tokyo Institute of Technology

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Re: String/Symbol equality
by Pascal Bourguignon 28 Sep '98

28 Sep '98

David Stes <stes(a)mundivia.es> wrote: > Pascal Bourguignon wrote: > > > > A relation noted with '=' should be an equivalence relation (thus > > should be symetric). > > But how does it relate to classes ? I rather would expect = to be mostly > symmetric for instances of a given class but not necessarily if you mix > instances of different classes. This imply that the implementor must ensure that its implementations of equivalence relations are actually symetric (and transitive and reflexive). You cannot merely say that instances are of different classes, because everything is an object, that is, if two instances do not belong to the exact same sub-class, the have at least one common super-class: Object. Last time I checked, equality was defined at the Object class level, and in a way that did ensure the implementation has every characteristic of equivalence relations. If you don't want to break your system, then when you override this exact operator, you must ensure that it is done with the same semantics. The direct relations between equivalence relations and classes is given (quite informaly, I agree) in the comment of #= in Object: = anObject "Answer whether the receiver and the argument represent the same object. [...]" "x is the same object than y" is obviouly an equivalence relation (that's why it's been named #=, by the way). Therefore if you override it in a subclass in such a way that it is no more an equivalence relation (rendering it asymetric, for example), then you can only expect chaos from your image. __Pascal Bourguignon__

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2.2 VM Porting Notes
by Maloney 27 Sep '98

27 Sep '98

For those of you maintinging ports of the Squeak VM, here are a few quick notes on new features of the 2.2 VM. 1. Support for masked cursors was added. You'll need to implement: ioSetCursorWithMask( int cursorBitsIndex, int cursorMaskIndex, int offsetX, int offsetY); perhaps by simply ignoring the mask argument. I did look at the Win32 API and believe that Windows supports the same kind of cursor masking as the Mac. See the comment in sqMacWindow.c for what it should do. 2. You may need to override the definition of ioLowResMSecs() in sq.h. (You can do this by #undefining it and replacing it with your own version in "sqPlatformSpecific.h". This is needed to fix a performance problem in the Mac's handling of timer interrupts. Thanks to Bob Arning for noticing the problem. 3. Asynchronous file I/O primitives have been added to support some work internal to Disney. Feel free to stub these out; they are not used by any code in the distribution image. Of course, you may also wish to implement them, as they are very useful when you wish to overlap high-bandwidth disk I/O and other compuation! We're not entirely sure where we are going with asynchronous file I/O, so this primitive interface may change. 4. We added support for the DEC Itsy to "sqConfig.h"; it isn't like to have any effect on other systems. We also changed the Acorn- and Itsy-related flag "LITTLE_ENDIAN" to "LITTLE_ENDIAN_BITBLT" because "LITTLE_ENDIAN" conflicts with a flag defined by the Gnu C compiler. 5. NOTE: Unix/Linux socket bug fix needed! Lex discovered a difference in the behavior of sqSocketReceiveDataAvailable() under Linux and the Mac that was masking a Squeak-level bug on the Linux platform. To make this function work the same across platforms, it should return "false" if the socket has become disconnected. It currently returns "true" on Linux and possibly other Unix platforms due to something about the way the "select()" system call works, I believe. (Andreas: could you make sure the Win32 VM returns "false" when the socket is unconnected? It probably does already, but I haven't tested it. It might behave differently under NT and Win95.) Let me know if you need further clarification on this. 6. New primitives have been added to the automatically generated files sqMiscPrims.c and sqSoundPrims.c. Be sure to re-generate these files from a 2.2 image before you rebuild the VM. I think that about covers changes to the VM support code, but please feel free to ask if I missed anything. -- John

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