April 2009 - MacRuby-devel - lists.macosforge.org

[MacRuby] #225: regexp engine broken when a string contains non ascii characters
by MacRuby 19 May '09

19 May '09

#225: regexp engine broken when a string contains non ascii characters -------------------------------------+-------------------------------------- Reporter: mattaimonetti@… | Owner: lsansonetti@… Type: defect | Status: new Priority: critical | Milestone: MacRuby 0.4 Component: MacRuby | Keywords: regexp, bug -------------------------------------+-------------------------------------- Here is a sample code to reproduce the problem: {{{ html = %{<a href="http://www.flickr.com/people/jeanelietrujillo/">jeanelietrujillo</a> posted a photo: <a href="http://www.flickr.com/photos/jeanelietrujillo/2211862262/" title="Galgani Décoration"><img src="http://farm3.static.flickr.com/2262/2211862262_2f08c343a3_m.jpg" width="240" height="240" alt="Galgani Décoration" /></a>} html.scan(/<img\s+src="(.+?)"/)[0][0] }}} ruby 1.9 returns: {{{ => "http://farm3.static.flickr.com/2262/2211862262_2f08c343a3_m.jpg" }}} macruby returns: {{{ => "ttp://farm3.static.flickr.com/2262/2211862262_2f08c343a3_m.jpg\"" }}} Now let's try to remove the é and replace it by a e: {{{ html = %{<a href="http://www.flickr.com/people/jeanelietrujillo/">jeanelietrujillo</a> posted a photo: <a href="http://www.flickr.com/photos/jeanelietrujillo/2211862262/" title="Galgani Decoration"><img src="http://farm3.static.flickr.com/2262/2211862262_2f08c343a3_m.jpg" width="240" height="240" alt="Galgani Décoration" /></a>} html.scan(/<img\s+src="(.+?)"/)[0][0] }}} MacRuby now returns: {{{ => "http://farm3.static.flickr.com/2262/2211862262_2f08c343a3_m.jpg" }}} My guess is that the unicode characters mess up the the count to extract the matched string resulting in a substring starting one character too early. To prove my hypothesis here is another sample, this time with 2 "é" characters: {{{ html = %{<a href="http://www.flickr.com/people/jeanelietrujillo/">jeanelietrujillo</a>a posté une photo: <a href="http://www.flickr.com/photos/jeanelietrujillo/2211862262/" title="Galgani Décoration"><img src="http://farm3.static.flickr.com/2262/2211862262_2f08c343a3_m.jpg" width="240" height="240" alt="Galgani Décoration" /></a>} html.scan(/<img\s+src="(.+?)"/)[0][0] }}} MacRuby returns: {{{ => "tp://farm3.static.flickr.com/2262/2211862262_2f08c343a3_m.jpg\" " }}} -- Ticket URL: <http://www.macruby.org/trac/ticket/225> MacRuby <http://macruby.org/>

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Dataflow: Erlang-Style Thread Safety in Ruby
by Rich Morin 30 Apr '09

30 Apr '09

Dataflow: Erlang-Style Thread Safety in Ruby http://bmorearty.wordpress.com/2009/04/26/dataflow-erlang-style-thread-safe… Some folks here might find this intriguing... -r -- http://www.cfcl.com/rdm Rich Morin http://www.cfcl.com/rdm/resume rdm(a)cfcl.com http://www.cfcl.com/rdm/weblog +1 650-873-7841 Technical editing and writing, programming, and web development

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Getting the "Embed MacRuby" target working
by Alex Vollmer 28 Apr '09

28 Apr '09

I've been trying to get my Xcode project setup correctly with the "Embed MacRuby" target. I've made the two-line change as suggested in tutorial and, unless I execute the target, I'm unable to load any Ruby classes. So then I made the "Embed…" target a pre-requisite of my application build. However when attempting to build after a clean, it fails because I don't have the correct build directories in place. The only way I could get it to work seamlessly regardless of project state was to add a new script to my application build and copy the contents of the "Embed…" task into the new task. Is there a better way of doing this? I feel like I've missed something here. Thanks, Alex ---- Musings & Notes — http://alexvollmer.com Track what you lend and borrow — http://moochbot.com

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HowTo help request
by Rich Morin 28 Apr '09

28 Apr '09

A few weeks ago, Laurent and I chatted about some possible HowTo articles. Unfortunately, he is far too busy to create the raw materials that I volunteered to wordsmith (and I don't have the MacRuby/ObjC/... chops needed to do his part): At 23:06 -0700 4/27/09, Laurent Sansonetti wrote: > For the article, I have 0 time to do it, sorry. What about > describing our idea on the mailing list and see if someone > is willing to help? If anyone on the list would like to create some example code and notes, I'll be happy to work with you on this (and I suspect that Laurent _would_ have time to provide incidental help and review). Anyway, my proposal is that we create a series of HowTos: * "Adding MacRuby to TextEdit" This would cover the pre-conditions (eg, MacRuby, Xcode), then explain how to add MacRuby to the TextEdit build. If possible, the last part of the HowTo should contain examples of calling internal TextEdit methods from irb. This would demonstrate MacRuby's utility as a tool for exploratory programming. * "Replacing ObjC methods with MacRuby" This would show how to replace the major kinds of ObjC methods with MacRuby code. At some point, it might be cool to have a MacRuby-only implementation of TextEdit. For now, however, this HowTo could show the basics of supplanting existing code in an application. * "Extending TextEdit with MacRuby" This HowTo would demonstrate how MacRuby can be used to add functionality to an application. I'm not sure, offhand, what kinds of functionality we should add, but I'd like to end up with the ability to load Ruby code from a ".textedit.rb" (or whatever) file. So, is anyone up for this? -r -- http://www.cfcl.com/rdm Rich Morin http://www.cfcl.com/rdm/resume rdm(a)cfcl.com http://www.cfcl.com/rdm/weblog +1 650-873-7841 Technical editing and writing, programming, and web development

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Out parameters with MacRuby
by Alex Vollmer 27 Apr '09

27 Apr '09

Is it possible to use "out" parameters with MacRuby, such as NSError? In my particular case I'd like to capture errors that result from parsing XML with NSXMLDocument using the initWithData:options:error: method. I tried (naively) just instantiating an NSError instance and handing it to that method, but ended up with this: irb(main):037:0> e = NSError.new => #<NSError:0x80067cc40> irb(main):038:0> doc = NSXMLDocument.alloc.initWithData(data, options:NSXMLDocumentValidate, error:e) ArgumentError: can't convert Ruby object `#<NSError:0x80067cc40>' to Objective-C value of type `^@' from (irb):38:in `initWithData:options:error:' from (irb):38 from /usr/local/bin/macirb:12:in `<main>' Any help or insight is appreciated. Cheers, Alex ---- Musings & Notes — http://alexvollmer.com Track what you lend and borrow — http://moochbot.com

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experimental branch: status update
by Laurent Sansonetti 27 Apr '09

27 Apr '09

A status update on the recent progresses on the experimental branch! Last week did not see a status update, mea culpa. - A new C/Objective-C dispatcher has been written. The idea is to use LLVM to compile stubs instead of using libffi. The previous libffi- based implementation is no longer used (yay for performance!) and we are able to run most of the C/Objective-C APIs. According to some early benchmarks, the new dispatcher is about 8 times faster than trunk, and about 3 times slower than pure Objective-C, so it's very promising. Getting rid of libffi was the goal, because it's very slow. - C structures covered by BridgeSupport annotations are also exposed, providing the exact same behavior as in trunk. The implementation is however new, since we no longer use libffi to represent them. Thanks to these changes, we are able to run some MacRuby Cocoa scripts (like hello world). - More work on the LLVM interpreter usage: we were able to plug some of the VM primitives into it and therefore interpret naive expressions. If everything goes well we could use it to run simple expressions instead of using the JIT, which should accelerate the load of large libraries (and make #eval a lot faster). - The ultra lazy JIT is now enabled by default. A couple of specs are now failing and will be investigated later, but on average it works great. - We started writing specs for MacRuby-specific behaviors (currently 66 examples and 305 expectations). - All 1.9 multiple assignment scenarios should now be implemented. - RubySpec was upgraded from the upstream version. - A RubyFFI-compatible API is under development. It uses the new C dispatcher functionality under the covers. Currently most types are supported except :pointer, structures (and maybe more). The cool thing about this API is that it's implemented in different versions of Ruby, so we should be able to reuse existing Ruby libraries based on it, until we support MRI C extensions. Laurent

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retrieving password from keychain
by Karl Varga 24 Apr '09

24 Apr '09

Hi there, I am having a strange problem that other people don't seem to be having because I can't find any references to in google searches. I am using MacRuby 0.4 installed from the binary available on the macruby binary releases page (MacRuby version 0.4 (ruby 1.9.1) [universal-darwin9.5, x86_64]) I have an application which stores username/passwords in the keychain. I can add items to the keychain (so I can call SecKeychainAddGenericPassword() fine and therefore I think my setup must be OK), but I cannot retrieve them. When I call: status, *data = SecKeychainFindGenericPassword( nil, service.length, service, username.length, username) I get an error: Configuration.app/Contents/Resources/Controller.rb:99:in `SecKeychainFindGenericPassword': wrong number of arguments (5 for 8) (ArgumentError) The method signature is this: OSStatus SecKeychainFindGenericPassword ( CFTypeRef keychainOrArray, UInt32 serviceNameLength, const char *serviceName, UInt32 accountNameLength, const char *accountName, UInt32 *passwordLength, void **passwordData, SecKeychainItemRef *itemRef ); All the examples I've read suggest that this method in macruby should only take 5 args and return the status, password length, password string and item reference (the last 3 extracted from *data) instead of passing in pointers (which I don't know how to do BTW). What gives? Anyone have any idea or had the same problem? -- Karl Varga kjvarga(a)gmail.com Cell: +61 (0)4 2075 1356

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hpricot and MacRuby
by s.ross 21 Apr '09

21 Apr '09

I've been toying around with MacRuby and I'm particularly interested in the MVC stuff that's been mentioned of late. I decided to do a proof of concept that consumes an XML-RPC Web service and wanted to parse it using hpricot. But... the gem won't build. Questions: Is it just me or has this been an issue for others? If it's just me, any ideas how to get the gem to build? Here's the error $ sudo macgem install hpricot Password: Building native extensions. This could take a while... ERROR: Error installing hpricot: ERROR: Failed to build gem native extension. /Library/Frameworks/MacRuby.framework/Versions/0.4/usr/bin/macruby extconf.rb install hpricot checking for main() in -lc... *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Thanks, Steve

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Re: [MacRuby-devel] NoMethodError for button#on_action in HotCocoa
by Frisco Del Rosario 21 Apr '09

21 Apr '09

I found I could fix one problem by moving the label and button declarations outside the layout_view block: w = window(:title => "Window", :size => [300,150]) l = label(:text_align => :center, :text => "", :layout => {:expand => [:width, :height], :align => "center"}) btn = button(:title => "put some text in the label", :layout => {:align => "center"}) lv = layout_view :frame => [0,0,280,130], :layout => {:expand => [:width, :height], :align => :center, :start => true} do |view| view << l view << btn end w << lv And then the button#on_action parameter has to be in braces: btn.on_action{l.text = "some text"}

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NoMethodError for button#on_action in HotCocoa
by Frisco Del Rosario 21 Apr '09

21 Apr '09

Got two unexpected results from running this script in HotConsole: require 'hotcocoa' include HotCocoa w = window(:title => "Window", :size => [220,100]) $lv = layout_view :frame => [0,0,200,80], :layout => {:expand => [:width, :height], :align => :center, :start => true} do |view| view << $l = label(:text_align => :center, :text => "", :layout => {:expand => [:width, :height], :align => "center"}) view << $btn = button(:title => "Put some text in the label", :layout => {:align => "center"}) end w << $lv $btn.on_action($l.text = "some text") Expected: Nothing Got: NoMethodError: undefined method `on_action' for 0:NSButton hotconsole:13:in `<compiled>' Expected: Text label to be empty Got: "some text"

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