May 2010 - Pharo-users - lists.pharo.org

Re: [Pharo-users] [Pharo-project] Fwd: Accentuate Characters
by Mariano Martinez Peck May 20, 2010

May 20, 2010

2010/5/20 Henrik Johansen <henrik.s.johansen(a)veloxit.no> > > On May 20, 2010, at 2:18 57PM, Mariano Martinez Peck wrote: > > > > ---------- Forwarded message ---------- > From: Adrien BARREAU <abarreau.dev(a)live.fr> > Date: Mon, May 17, 2010 at 11:16 AM > Subject: [Pharo-users] Accentuate Characters > To: pharo-users(a)lists.gforge.inria.fr > > > Hello, > > I want to compose accentuate character in Pharo, but I don't know how I can > do that. > I saw in Visual Works I can write this kind of things : > > $e composeDiacritical: (Character diacriticalNamed: #acute). > > That returns $Ã©. > > But, I don't find a way to do that in Pharo. > > Does somebody have an idea ? :) > > A.B. > > > cc := CombinedChar new. > cc add: $e; add: (Unicode value: 769); combined > > Diacriticals in CombinedChar only contain the Unicode Combining Diacritical > Marks, it seems. > There's no symbol -> diacriticial char mapping as far as I can tell. > > Cheers, > Henry > > > > > _______________________________________________ > Pharo-project mailing list > Pharo-project(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project >

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Stateful traits in Pharo?
by Johan Fabry May 20, 2010

May 20, 2010

Hi all, I was wondering if there is an implementation of stateful traits that works in Pharo. If so, where can I get it, and is it stable ? -- Johan Fabry jfabry(a)dcc.uchile.cl - http://dcc.uchile.cl/~jfabry PLEIAD Lab - Computer Science Department (DCC) - University of Chile

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Flushing the VM method cache?
by Joachim Geidel May 20, 2010

May 20, 2010

Hello all, The software I am working on generates classes on the fly, and discards those classes when they are no longer needed. The class library is cross-platform, i.e. it exists for Dolphin and VisualWorks, and I am currently porting it to Pharo. In Dolphin, it is necessary to flush the VM's method cache after discarding all the dynamically generated classes, because the method cache holds references to the classes which prevent them from being garbage collected. For VisualWorks, I have adopted this, although I am not quite sure if it's actually needed there. In the Pharo 1.0 image, I haven't found a method for flushing the VM's method cache in one go, there only seems to be Behavior>>flushCache. What I would like to know is: - Does the VM method cache of the Squeak VM hold references to classes which prevent an obsolete class from being garbage collected? If this is not the case, I don't need to flush anything. - If flushing the cache is advisable, is Behavior>>flushCache the only way to do this? I would have to pick up all the obsolete classes and iterate over them in that case. Thanks in advance! Joachim Geidel

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Newbie: Does Socket ping: 'addr' work in Pharo3.11.8 ?
by RickT May 17, 2010

May 17, 2010

I installed the one-click version on Windows (XP) recently and am learning Smalltalk. I am under the impression that in a Shout Workspace I can execute the line Socket ping: 'localhost' (or some valid address). But I always get a message that it timed out. I can successfully ping the same address in a command window. Any guidance would be appreciated. -- View this message in context: http://forum.world.st/Newbie-Does-Socket-ping-addr-work-in-Pharo3-11-8-tp22… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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[ANN] Traits installer/uninstaller utility
by Johan Fabry May 16, 2010

May 16, 2010

Hi all, this is a small package that I wrote after doing a traits-based refactoring of AspectMaps (Plug: Check out AspectMaps for a cool visualization of Aspects. http://pleiad.cl/aspectmaps. It has nice screencasts. All comments welcome!) AspectMaps extends a number of classes of FAMIX to do its thing, using standard class extensions. This works OK when you are not using traits. But when using a trait, you need to redef the class, i.e. change the original package (in this case one of the moose packages). A big no-no. This kind of change should also be encapusulated in the AspectMaps package, but currently this is not possible. So, as long as traits and packages dont play well together, these kinds of refactorings are out. However not so when you are using the TraitsApplication package. This package provides a means to programmatically install/uninstall traits. Call it in a post-load action on a package (if such a thing exists), in a class initialize method, et cetera (for AspectMaps I do it in the AspectMaps>>open method). I thought this could be useful to some members of the community so I am releasing it publicly. You can find it at http://www.squeaksource.com/TraitsApplication CAVEAT: This is a quick implementation, it is non-optimal. It can be made much more elegant, but that requires time that I dont have right now :-(. I does not handle fancy trait compositions (yet). I give no guarantees other than that 1) it passes all of its tests 2) it works for me :-) So check it out. Comments are welcome! -- Johan Fabry jfabry(a)dcc.uchile.cl - http://dcc.uchile.cl/~jfabry PLEIAD Lab - Computer Science Department (DCC) - University of Chile

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Anyone wants to put style to the welcome workspace?
by Mariano Martinez Peck May 16, 2010

May 16, 2010

Hi folks. Any volunteer to make the welcome workspace nicer? Now it is just plane text. Maybe adding some style to title, colors etc may be cool. I don't know how to do it, neither I have too much time. If you want to see where it is such code it is in DEVImageWorkspaces >> openWelcomeWorkspace in the package ImageForDevelopers-pharo from the repository http://www.squeaksource.com/ImageForDevelopers Thanks in case someone can help. Mariano

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Re: [Pharo-users] [Vm-dev] Fwd: Need help with Alien, unexpected function return value
by Joachim Geidel May 16, 2010

May 16, 2010

Steve, >>> result := (Alien newGC: 4) pointer. >>> functionPointer >>> primFFICallResult: result >>> with: self asJNIParameter. >>> ^result signedIntAt: 1 [snip] > When you use a pointer alien (which has a size field of zero) as the > return result of a function call, the alien code expects the result from > the alien to be a pointer to some area of memory and replaces the > address field of the result alien with the result returned by the > function call. You're lucky your method returned any result at all > rather than crashing with an access violation - you are dereferencing > whatever sits at 0x00010006. [snip] >>> result := (Alien newC: 4). >>> functionPointer >>> primFFICallResult: result pointer >>> with: self asJNIParameter. >>> ^result signedIntAt: 1 [snip] > This time you are returning the signed int at the block of memory > allocated by the newC: call. The memory gets zeroed before use, which is > why you get a zero. Because you used "result pointer" in the alien call > the alien code again replaces the pointer alien's address with the > result. This time though, you don't have a reference to the pointer > alien, so the result is effectively discarded. Thanks a lot for the explanation! Am 16.05.10 03:58 schrieb Steve Rees: > Try the following > > result := (Alien new: 4). > functionPointer > primFFICallResult: result > with: self asJNIParameter. > ^result signedIntAt: 1 Yes, that's it. I get the expected result now. I'll have to inspect the rest of my (ab)use of Aliens now, but that shouldn't take long. After that I'll have to find out where I should explicitly free Aliens and where the garbage collector will do that for me. I am sure I have built in some nice memory leaks. :-) Thanks again! Joachim

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Need help with Alien, unexpected function return value
by Joachim Geidel May 15, 2010

May 15, 2010

Hello everybody, I need some help with Alien on Mac OS X 10.6.3 in Pharo 1.0. I am calling a function from a vtable struct in the Java Native Interface of the Java VM which comes with Mac OS X and which is defined as jint ( __stdcall * GetVersion)(JNIEnv * env); The result type jint is just an alias for int. The Smalltalk method is ---- primGetVersion | functionPointer result vtablePointer | vtablePointer := Alien atAddress: self externalData asUnsignedLong dataSize: Alien sizeofPointer * self vtableSize. functionPointer := Alien forPointer: (vtablePointer unsignedLongAt: (4 * Alien sizeofPointer + 1)). result := (Alien newGC: 4) pointer. functionPointer primFFICallResult: result with: self asJNIParameter. ^result signedIntAt: 1 ---- functionPointer is the pointer to the GetVersion function. The result should be 65542 (16r00010006), which is also what I get when calling the function from VisualWorks, but the method answers -394042288 (-16r177C9BB0). The "result" Alien has the printString '#[0 0 0 0 6 0 1 0]' which suspiciously contains the 1 and the 6 I am looking for, but in the wrong places. ;-) I looked at examples for callouts, which seem to indicate that result should be the Alien and not a pointer to it. So I changed the code to ---- result := (Alien newC: 4). functionPointer primFFICallResult: result pointer with: self asJNIParameter. ^result signedIntAt: 1 ---- This didn't really help. The result is now 0 (zero), although the Alien prints as #[252 255 255 255 80 15 38 0] which doesn't look like a 0 at first sight. Am I using those Aliens in a correct way? What can I try to debug this? If this is too obscure and someone who knows about Aliens would like to have a look at the rest of the code, I am willing to send a bunch of Monticello packages and instructions for reproducing the problem, but I won't make it publicly available yet. Any help is welcome. Best regards, Joachim Geidel -- View this message in context: http://forum.world.st/Need-help-with-Alien-unexpected-function-return-value… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Using FFI to call a MacOs System function
by David Wilson May 15, 2010

May 15, 2010

Hi I'm new to Pharo (although I was a Smalltalk programmer in the 90's), and I'm trying to use FFI to access an MacOs system function: apiKLGetKeyboardLayoutCount < cdecl: ulong 'KLGetKeyboardLayoutCount' (void) module: 'keyboards'> ^ self externalCallFailed. I get an error "'Unable to find function address'" which seems to say the OS-module "keyboards" can't be found. I can't figure out what the address should be. The function is defined here: http://developer.apple.com/legacy/mac/ library/documentation/Carbon/Reference/KeyboardLayoutServices/ Reference/reference.html (yes, it's deprecated, I have a very old mac runnning 10.4). I'm not sure if I'm using FFI correctly, do I have to somehow include the external library in the Pharo VM? Can anyone help? I'm looked for FFI examples, but don't find anything helpful. David

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Resolving some dependencies...
by Carla F. Griggio May 14, 2010

May 14, 2010

Hi everyone! I'm trying to load a sar archive for Connectors into Pharo and I need to resolve some dependencies in order to do that. In other words, I want to port Connectors from Squeak to Pharo. It seems that Connectors dependes on several classes of Morphic and Etoys that don't come with the latest Pharo images. The dependencies I need to resolve are: - TileMorph - PhraseTileMorph - Presenter - Player - Vocabulary - SymbolListType - ObjectPropertiesMorph - GenericPropertiesMorph I already resolved the following dependencies loading the packages in this repository: http://www.squeaksource.com/PharoMorphicExtras - PartsBin - ObjectsTool - BookMorph - GraphicalDictionaryMenu I started browsing classes in Squeak to follow these dependencies, and the "dependency tree" seems kind of deep, so exporting classes from Squeak and importing them into Pharo manually feels kind of dirty, I always end up having to resolve *yet* *anoher* dependency... So I started looking for some Metacello configurations that could help me with this, but I just found ConfigurationOfPharoMorphicExtras, which helped me with some of the dependencies but not all of them. Are there any Metacello configurations that could help me with this, at least with some of the dependencies? Or should I keep tracing dependencies and doing this 'manual porting' from Squeak to Pharo? Thanks in advance! Carla. PS: When I used ConfigurationOfPharoMorphicExtras, it loaded some Morphic packages but not the MorphicExtras package itself, I had to load it manually later. Is that OK?

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