Squeak-dev March 2000

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131 participants
580 discussions

Re: who's who on swiki
by Bert Freudenberg 02 Mar '00

02 Mar '00

On Wed, 1 Mar 2000, Bob Arning wrote: > On Thu, 02 Mar 2000 10:08:37 +0900 Aran Lunzer <aran(a)meme.hokudai.ac.jp> wrote: > >In fact, the o-umlaut doesn't display correctly on any of the systems I > >have here - Goran's name appears as `G " an'. Is anyone else having > >trouble with this kind of character? > > I have trouble, too, with my email client (I never got around to > finishing the odd-characters-in-the-address mode). His emails arrive > here with > > "G÷ran" Hultgren <gohu(a)rocketmail.com> > > as the sender, where the second character is "Character value: 247". It should be 246, which is ö according to http://www.fmi.uni-passau.de/~ramsch/iso8859-1.html while 247 indeed is the division sign. > I'm not real sure about whether the double quotes in his name are > correctly placed - I'll dig around for the rfc and check. The > interesting thing is that if you use QuickPrint>>drawString:at: to > render his name, it stops after the G since 247 is outside the range > of Squeak's default font and QuickPrint doesn't continue after a > stopCondition is found. So he shows up as "G" in my hierarchical lists > and "Göran" when in a regular text morph. Squeak uses another charset, you should call isoToSqueak for this ... -Bert-

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Re: who's who on swiki
by Lex Spoon 02 Mar '00

02 Mar '00

Bob Arning <arning(a)charm.net> wrote: > I have trouble, too, with my email client (I never got around to finishing the odd-characters-in-the-address mode). His emails arrive here with > > "G÷ran" Hultgren <gohu(a)rocketmail.com> > > as the sender, where the second character is "Character value: 247". I'm not real sure about whether the double quotes in his name are correctly placed - I'll dig around for the rfc and check. Internet mail addresses have to be one of the most baroque syntaxes ever invented and put into actual use. In fact, this example appears to be legal. If you have a <foo@bar> address, then all of the "words" preceding the <foo@bar> are ignored as commentary. Here are relevancies from RFC 822 (comments are mine): route-addr = "<" [route] addr-spec ">" mailbox = addr-spec / phrase route-addr phrase = 1*word ; sequence of words word = atom / quoted-string ; note quoted-string is an option Incidentally, the address parser in Squeak (MailAddressParser) handles this case. Lex

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RE: [ENH] Case independent numbers
by Jarvis, Robert P. (Contingent) 02 Mar '00

02 Mar '00

> -----Original Message----- > From: Dan Ingalls [SMTP:Dan.Ingalls@disney.com] > Sent: Wednesday, March 01, 2000 5:30 PM > To: squeak(a)cs.uiuc.edu > Subject: RE: [ENH] Case independent numbers > > I will have to admit to a bit of bigotry here. I was the originator of > the numeric format, and I object to a couple of the ANSI decisions > regarding the syntax of numeric constants. I have three reasons for > this... > > 1. I much prefer 2r1e31 to 2r10000000000000000000000000000000 for the > sign bit and 16rFe8 for the high nibble of a 32-bit integer and 10e6 for a > million. Come on. > > 2. I just feel that the current (Squeak) def, which is the original one, > is a micro world of simplicity and generality. Radix, digits and exponent > defined analogously over ints, largeInts, and Floats. That's all. > > 3. I have spent entire hours with inquisitive kids, just exploring this > micro world. If they get bored with 2r1e10 then it's time to step out and > explore the meaning of 3r11.2. > Hmmmm. OK, I think I understand your view on this. But it's still not intuitive*. Bob Jarvis Compuware @ Timken *Definition of "intuitive" is based on subjective factors such as life experience and may vary between individuals. Dealer contribution may affect final cost. Tax, title, and dealer prep not included.

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Re: How do you interpret MessageTally>>tallySends?
by Lex Spoon 02 Mar '00

02 Mar '00

"David Pennell" <dpennell(a)quallaby.com> wrote: > How do you interpret MessageTally>>tallySends? > > I need to speed up some code, is this the best place to start looking? > Oh yes. It's so easy to profile in Squeak, there is no good reason to hack a performance change before you've bothered to run the profiler on your code: MessageTally spyOn: [ myCode doStuff ] Lex

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RE: Squeak viruses (was Re: [VIRUS WARNING] Re: Check this)
by Raab, Andreas 02 Mar '00

02 Mar '00

> Along the same line (security), has anyone looked deeply into > what kind of security issues are opened up by the Squeak browser > plug-in? Yes. Several people have (and not only for Squeak). > A hacker friend of mine suggests that Squeak will have far, FAR more > potential security issues than Java has or ever could. Then your hacker friend doesn't really understand the issue ;-) By definition, a Smalltalk system runs bytecodes and will go through primitives to do any I/O like stuff. The I/O stuff is what's critical for security since if you can't read files from the host system you can't spy somebody out, if you can't open sockets to some external host you can't send the credit card number back, if you can't access named primitives from unvalidated external VM plugins you can't do any uncontrolled things, if you can't save the image you can't keep any stuff in that may harm you later, etc. So, if the I/O stuff is secured the system is as secure as you want it to be. The only thing that's relatively easy to do in a Smalltalk system (and a little harder in Java) is to crash the VM (though this could be made harder by a VM level code validator). But on any even somewhat recent OS that'll just throw out Squeak and that's that (hey, that even works on Windows ;-) Andreas

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Re: Squeak viruses (was Re: [VIRUS WARNING] Re: Check this)
by Dino 02 Mar '00

02 Mar '00

Lawson English wrote: > > On Wed, Mar 1, 2000 8:39 PM, ssadams(a)us.ibm.com <mailto:ssadams@us.ibm.com> > wrote: > > > > > >Has anyone thought about how one would write a virus for squeak? I only > >bring this up because the best way to protect yourself is to know your > >enemy. Hey, maybe we could have a virus writing contest!?? > > Along the same line (security), has anyone looked deeply into what kind of > security issues are opened up by the Squeak browser plug-in? > > A hacker friend of mine suggests that Squeak will have far, FAR more > potential security issues than Java has or ever could. man, when script kiddies start using smalltalk, that'll be the day... Dino

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RE: How to determine screen depth?
by Raab, Andreas 02 Mar '00

02 Mar '00

> Ya - the prim 92 I mentioned seems to be intended to > manipulate the host display, but nobody uses it yet and > I haven't implemented it on the Acorn, so who knows? > Whoever wrote it! Andreas? Yup. It was a bit too early at this time but I am planning to put it back to live at some point in the not-too-far future. Andreas

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[BUG] Sockets aren't playing nice with me
by Robert Withers 02 Mar '00

02 Mar '00

There have been several threads on the sockets in squeak over the past several months which I have reviewed but I am still confused. I inspect: NetNameResolver localHostAddress. and I get 127.0.0.1 cool. My clientServerTestUDP works, it seems to be the TCP stuff. Also my Socket ping: 'localhost' fails. It seems that connectTo:timeout: doesn't connect (through various tests) but this issue doesn't show up until the waitForConnect stuff is called. All of my functionality works outside of squeak (Linux SuSU 6.3 on an intel). Why isn't squeak working like the other network programs? Why do we have waitFor... methods? Wouldn't it be better to have atomic socket operations? (accept, listen, bind, connect, send, receive, disconnect, destroy, setIOCtls, getIOCtls) What can we do to fix this? Do we need FFI/Callin or can we continue to use named primatives? It would be nice to have a debug facility that we can turn on inside the primative code; perhaps assertions? I wish I had more answers to post at this time, but I don't. I would be very interested in helping code a solution with design assistance. thanks, Rob -- -------------------------------------------------- Smalltalking by choice. Isn't it nice to have one!

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How do you interpret MessageTally>>tallySends?
by David Pennell 02 Mar '00

02 Mar '00

How do you interpret MessageTally>>tallySends? I need to speed up some code, is this the best place to start looking? thanks, -david

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Squeak viruses (was Re: [VIRUS WARNING] Re: Check this)
by ssadams＠us.ibm.com 02 Mar '00

02 Mar '00

A couple of categories for Squeak-based viruses: getsNil - All of the ways to clobber your system by assigning nil to a critical element in a system, environment or method dictionary (e.g., Smalltalk := nil) roguePolymorph - All of the ways to use doesNotUnderstand: hacks to allow a (presumably) malicious object to proxy for any other object. This is an uncommon but pernicious bug that has occured naturally in Smalltalk development over the years, where the wrong object gets assigned to a variable, but it understands enough of the same protocol of the intended object to function just long enough to get a long way from the original bug before it no longer understands some message and raises the debugger. This was first documented in one of my HOOPLA! articles back in the late '80s. This type of virus can also be useful, such as the SelfInitializingObject in old Smalltalk/V and AlwaysUnderstandingObject in the old KSC WindowBuilder. Regards, Sam Sam S. Adams, IBM Distinguished Engineer, IBM Research 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>> "Paul FitzGerald" <pfitzgerald(a)fuzzymuffs.com> on 03/01/2000 06:50:35 PM Please respond to squeak(a)cs.uiuc.edu To: squeak(a)cs.uiuc.edu cc: Subject: Re: [VIRUS WARNING] Re: Check this Has anyone thought about how one would write a virus for squeak? I only bring this up because the best way to protect yourself is to know your enemy. Hey, maybe we could have a virus writing contest!?? Paul FitzGerald ---------- >From: "Jecel Assumpcao Jr." <jecel(a)merlintec.com> > I found this very offensive - any viruses on this list should be written in > Squeak (or Python, at the very least!), don't you think? > > -- Jecel

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