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Re: [Pharo-users] arrays with FFI structs

by Esteban Lorenzano

With UFFI, what youâll do for âbeing OOâ is to: 1) extend FFIExternalStructure 2) then use your class adding methods that use the structure into it (using âselfâ as argument). For example: FFIExternalStructure subclass: #MyStruct. MyStruct>>#method1: arg ^ self ffiCall: #(int function1(self, arg1)) (and example of this can be found on AthensCairoMatrix in image). cheers, Esteban ps: in Pharo5, you may want to update to latest UFFI (not *needed* but betterâ¦ I need to make a new Pharo5 build with updated versions) > On 10 Sep 2016, at 04:41, Ben Coman <btc(a)openinworld.com> wrote: > > On Sat, Sep 10, 2016 at 8:47 AM, Pierce Ng <pierce(a)samadhiweb.com> wrote: >> On Sat, Sep 10, 2016 at 01:11:18AM +0800, Ben Coman wrote: >>> Are arrays within structs handled? I have a C type declaration... >> >> Ben, >> >> Is it possible to write C functions to manipulate these structures, build these >> functions into a shared library, and call the functions from Pharo? > > Maybe. Particularly since my next challenge is to use a callback. My > usage is parsing the VM platform C files as a one-shot import to > analyse from Pharo, so doing most of the legwork in C and returning > just the final result to Pharo may be fine. However at the moment my > goal is as much about learning to use FFI, so I'll push in that > direction as long as I can. > >> More "object oriented", heh. > > Actually "clang" is OO being written in C++. But I understand the C++ > name mangling makes life difficult for our FFI. "libclang" is the > plain-C wrapper interface of "clang", which also is advertised as more > stable, with clang advertised as often changing. Apparently libclang > can't access all of clang's features, but I think it will be a while > before I reach the point of discovering the impact of that, and it may > well be outside my requirements. > > cheers -ben > >> Of course I've only just had a cursory glance at >> libclang while typing this reply and don't know what your usage is. >> >> Pierce >> >

Sept. 10, 2016

Re: [Pharo-users] Cryptography packages

by Esteban Lorenzano

http://www.squeaksource.com/Cryptography.html <http://www.squeaksource.com/Cryptography.html> some of the algorithms present there are already in the image, but others donât :) Esteban > On 10 Sep 2016, at 04:03, Esteban A. Maringolo <emaringolo(a)gmail.com> wrote: > > Hi there, > > What are the most maintaned/popular cryptography package for Pharo? > > Regards! > > Esteban A. Maringolo

Sept. 10, 2016

Re: [Pharo-users] arrays with FFI structs

by Ben Coman

On Sat, Sep 10, 2016 at 8:47 AM, Pierce Ng <pierce(a)samadhiweb.com> wrote: > On Sat, Sep 10, 2016 at 01:11:18AM +0800, Ben Coman wrote: >> Are arrays within structs handled? I have a C type declaration... > > Ben, > > Is it possible to write C functions to manipulate these structures, build these > functions into a shared library, and call the functions from Pharo? Maybe. Particularly since my next challenge is to use a callback. My usage is parsing the VM platform C files as a one-shot import to analyse from Pharo, so doing most of the legwork in C and returning just the final result to Pharo may be fine. However at the moment my goal is as much about learning to use FFI, so I'll push in that direction as long as I can. > More "object oriented", heh. Actually "clang" is OO being written in C++. But I understand the C++ name mangling makes life difficult for our FFI. "libclang" is the plain-C wrapper interface of "clang", which also is advertised as more stable, with clang advertised as often changing. Apparently libclang can't access all of clang's features, but I think it will be a while before I reach the point of discovering the impact of that, and it may well be outside my requirements. cheers -ben > Of course I've only just had a cursory glance at > libclang while typing this reply and don't know what your usage is. > > Pierce >

Sept. 10, 2016

Cryptography packages

by Esteban A. Maringolo

Hi there, What are the most maintaned/popular cryptography package for Pharo? Regards! Esteban A. Maringolo

Sept. 10, 2016

Re: [Pharo-users] arrays with FFI structs

by Pierce Ng

On Sat, Sep 10, 2016 at 01:11:18AM +0800, Ben Coman wrote: > Are arrays within structs handled? I have a C type declaration... Ben, Is it possible to write C functions to manipulate these structures, build these functions into a shared library, and call the functions from Pharo? More "object oriented", heh. Of course I've only just had a cursory glance at libclang while typing this reply and don't know what your usage is. Pierce

Sept. 10, 2016

Re: [Pharo-users] [SCREENCAST] Creating GUIs with Pharo

by Dimitris Chloupis

good thing you did not Sorry guys but that was a spectacular failure, the recording started fine, Twitch decided to stop broadcasting after 3 minutes , the software I use which is by the way recommended by Twitch was saying that it was streaming, then it did not let me close the stream had to exit it and when i went back to twitch i realised that of the 1 hour 20 minutes me talking to the monitor it recorded only the first 3. A spectacular failure :D I think I will go back to 10 min youtube tutorial, its far safer :D A huge apology to people who could not watch the broadcast, if I manage to find the video file, assuming that software bothered to record it I will publish it but its most likely all my effort went to waste. Oh well, that's life I guess. On Fri, Sep 9, 2016 at 9:45 PM Esteban Lorenzano <estebanlm(a)gmail.com> wrote: > I will not be able to attend :( > > (Iâm in a train nowâ¦ but as a regular observationâ¦ I think a Friday 21h is > not the best moment :P) > > Esteban > > On 09 Sep 2016, at 20:30, Dimitris Chloupis <kilon.alios(a)gmail.com> wrote: > > Just a friendly reminder the screencast will begin in 30 minutes. > > https://www.twitch.tv/kilonalios > > > > On Fri, Sep 9, 2016 at 2:09 PM Dimitris Chloupis <kilon.alios(a)gmail.com> > wrote: > >> Sure no problem , I am always online with Discord, so even if one does >> not attend he can ask me to show him on a next screencast. I will try to >> make one screencast per month. 50 per year , one or half hour long >> depending on the subject and how much I know. For those that prefer the >> mailing list you can use this thread for discussion. >> On Fri, 9 Sep 2016 at 13:07, Ben Coman <btc(a)openinworld.com> wrote: >> >>> Sounds interesting but its 3am for me, so probably I wont attend. I >>> look forward to watch it later. >>> >>> cheers -ben >>> >>> On Fri, Sep 9, 2016 at 5:39 PM, Dimitris Chloupis <kilon.alios(a)gmail.com> >>> wrote: >>> > So as I promised tonight I will share a live screencast about creating >>> GUIs >>> > with Pharo, that includes UIManager , Morphic and a bit of Spec. The >>> focus >>> > will be mainly Morphic that I am more familiar with. >>> > >>> > The place is my twitch channel >>> > >>> > https://www.twitch.tv/kilonalios >>> > >>> > You dont need an account to watch but if you want to chat with me live >>> > during the screencast you do. I will be checking Discord chat as well. >>> > >>> > The time is 22:00 local time (Athens, Greece) which is 20:00 GMT >>> (including >>> > +1 hour summer time) which is 19:00 UTC (no +1 hour summer time) >>> > there is also a countdown here >>> > >>> > >>> https://www.timeanddate.com/countdown/launch?iso=20160909T22&p0=26&msg=%5BS… >>> > >>> > After the screencast I will be in the Discord channel for questions and >>> > ideas , you can get an invite here >>> > >>> > https://discord.gg/F6nAd >>> > >>> > If you are unable to attend , Twitch makes screencasts available >>> online to >>> > watch any time its convenient for you >>> > >>> > See you then, have fun :) >>> > >>> > >>> >>> >

Sept. 9, 2016

Re: [Pharo-users] [SCREENCAST] Creating GUIs with Pharo

by Esteban Lorenzano

I will not be able to attend :( (Iâm in a train nowâ¦ but as a regular observationâ¦ I think a Friday 21h is not the best moment :P) Esteban > On 09 Sep 2016, at 20:30, Dimitris Chloupis <kilon.alios(a)gmail.com> wrote: > > Just a friendly reminder the screencast will begin in 30 minutes. > > https://www.twitch.tv/kilonalios <https://www.twitch.tv/kilonalios> > > > > On Fri, Sep 9, 2016 at 2:09 PM Dimitris Chloupis <kilon.alios(a)gmail.com <mailto:kilon.alios@gmail.com>> wrote: > Sure no problem , I am always online with Discord, so even if one does not attend he can ask me to show him on a next screencast. I will try to make one screencast per month. 50 per year , one or half hour long depending on the subject and how much I know. For those that prefer the mailing list you can use this thread for discussion. > On Fri, 9 Sep 2016 at 13:07, Ben Coman <btc(a)openinworld.com <mailto:btc@openinworld.com>> wrote: > Sounds interesting but its 3am for me, so probably I wont attend. I > look forward to watch it later. > > cheers -ben > > On Fri, Sep 9, 2016 at 5:39 PM, Dimitris Chloupis <kilon.alios(a)gmail.com <mailto:kilon.alios@gmail.com>> wrote: > > So as I promised tonight I will share a live screencast about creating GUIs > > with Pharo, that includes UIManager , Morphic and a bit of Spec. The focus > > will be mainly Morphic that I am more familiar with. > > > > The place is my twitch channel > > > > https://www.twitch.tv/kilonalios <https://www.twitch.tv/kilonalios> > > > > You dont need an account to watch but if you want to chat with me live > > during the screencast you do. I will be checking Discord chat as well. > > > > The time is 22:00 local time (Athens, Greece) which is 20:00 GMT (including > > +1 hour summer time) which is 19:00 UTC (no +1 hour summer time) > > there is also a countdown here > > > > https://www.timeanddate.com/countdown/launch?iso=20160909T22&p0=26&msg=%5BS… <https://www.timeanddate.com/countdown/launch?iso=20160909T22&p0=26&msg=%5BS…> > > > > After the screencast I will be in the Discord channel for questions and > > ideas , you can get an invite here > > > > https://discord.gg/F6nAd <https://discord.gg/F6nAd> > > > > If you are unable to attend , Twitch makes screencasts available online to > > watch any time its convenient for you > > > > See you then, have fun :) > > > > >

Sept. 9, 2016

Re: [Pharo-users] [SCREENCAST] Creating GUIs with Pharo

by Dimitris Chloupis

Just a friendly reminder the screencast will begin in 30 minutes. https://www.twitch.tv/kilonalios On Fri, Sep 9, 2016 at 2:09 PM Dimitris Chloupis <kilon.alios(a)gmail.com> wrote: > Sure no problem , I am always online with Discord, so even if one does not > attend he can ask me to show him on a next screencast. I will try to make > one screencast per month. 50 per year , one or half hour long depending on > the subject and how much I know. For those that prefer the mailing list you > can use this thread for discussion. > On Fri, 9 Sep 2016 at 13:07, Ben Coman <btc(a)openinworld.com> wrote: > >> Sounds interesting but its 3am for me, so probably I wont attend. I >> look forward to watch it later. >> >> cheers -ben >> >> On Fri, Sep 9, 2016 at 5:39 PM, Dimitris Chloupis <kilon.alios(a)gmail.com> >> wrote: >> > So as I promised tonight I will share a live screencast about creating >> GUIs >> > with Pharo, that includes UIManager , Morphic and a bit of Spec. The >> focus >> > will be mainly Morphic that I am more familiar with. >> > >> > The place is my twitch channel >> > >> > https://www.twitch.tv/kilonalios >> > >> > You dont need an account to watch but if you want to chat with me live >> > during the screencast you do. I will be checking Discord chat as well. >> > >> > The time is 22:00 local time (Athens, Greece) which is 20:00 GMT >> (including >> > +1 hour summer time) which is 19:00 UTC (no +1 hour summer time) >> > there is also a countdown here >> > >> > >> https://www.timeanddate.com/countdown/launch?iso=20160909T22&p0=26&msg=%5BS… >> > >> > After the screencast I will be in the Discord channel for questions and >> > ideas , you can get an invite here >> > >> > https://discord.gg/F6nAd >> > >> > If you are unable to attend , Twitch makes screencasts available online >> to >> > watch any time its convenient for you >> > >> > See you then, have fun :) >> > >> > >> >>

Sept. 9, 2016

Re: [Pharo-users] arrays with FFI structs

by Esteban Lorenzano

by the way, this is a new feature of UFFIâ¦ old NB didnât have it :) > On 09 Sep 2016, at 19:17, Esteban Lorenzano <estebanlm(a)gmail.com> wrote: > > not very well (I didnât adapted the parser or optimised it, but it works fine :P). > you need to declare a type: > > CXCursor class>>initiallize > VoidPointer3 := FFITypeArray ofType: âvoid*â. > > then you declare: > > CXCursor class >> fieldsDesc > "self rebuildFieldAccessors" > ^ #( > int kind; > int xdata; > VoidPointer3 data; > ) > > that should work (never tried with void*, but I do not see why wouldnât work) > > cheers, > Esteban > > ps: and yes, the idea is to extend the parser for doing thisâ¦ but no time :( > >> On 09 Sep 2016, at 19:11, Ben Coman <btc(a)openinworld.com> wrote: >> >> Are arrays within structs handled? I have a C type declaration... >> >> typedef struct { >> enum CXCursorKind kind; >> int xdata; >> const void *data[3]; >> } CXCursor; >> >> which for the moment I've simplified the enum and defined... >> >> FFIExternalStructure subclass: #CXCursor >> instanceVariableNames: '' >> classVariableNames: '' >> package: 'Libclang' >> >> CXCursor class >> fieldsDesc >> "self rebuildFieldAccessors" >> ^ #( >> int kind; >> int xdata; >> void *data[3]; >> ) >> >> an evaluated... >> CXCursor rebuildFieldAccessors >> >> but it produces... Error: Unable to resolve external type: [ >> So it seems arrays inside structs are currently not handled ? >> >> Now I read the typedef as "data is an array of three pointers to >> void", so how likely is it for something like this to work... >> >> CXCursor class >> fieldsDesc >> "self rebuildFieldAccessors" >> ^ #( >> int kind; >> int xdata; >> void *data1; >> void *data2; >> void *data3; >> ) >> >> I'll experiment some more in the meantime. >> >> cheers -ben >> >

Sept. 9, 2016

Re: [Pharo-users] arrays with FFI structs

by Esteban Lorenzano

not very well (I didnât adapted the parser or optimised it, but it works fine :P). you need to declare a type: CXCursor class>>initiallize VoidPointer3 := FFITypeArray ofType: âvoid*â. then you declare: CXCursor class >> fieldsDesc "self rebuildFieldAccessors" ^ #( int kind; int xdata; VoidPointer3 data; ) that should work (never tried with void*, but I do not see why wouldnât work) cheers, Esteban ps: and yes, the idea is to extend the parser for doing thisâ¦ but no time :( > On 09 Sep 2016, at 19:11, Ben Coman <btc(a)openinworld.com> wrote: > > Are arrays within structs handled? I have a C type declaration... > > typedef struct { > enum CXCursorKind kind; > int xdata; > const void *data[3]; > } CXCursor; > > which for the moment I've simplified the enum and defined... > > FFIExternalStructure subclass: #CXCursor > instanceVariableNames: '' > classVariableNames: '' > package: 'Libclang' > > CXCursor class >> fieldsDesc > "self rebuildFieldAccessors" > ^ #( > int kind; > int xdata; > void *data[3]; > ) > > an evaluated... > CXCursor rebuildFieldAccessors > > but it produces... Error: Unable to resolve external type: [ > So it seems arrays inside structs are currently not handled ? > > Now I read the typedef as "data is an array of three pointers to > void", so how likely is it for something like this to work... > > CXCursor class >> fieldsDesc > "self rebuildFieldAccessors" > ^ #( > int kind; > int xdata; > void *data1; > void *data2; > void *data3; > ) > > I'll experiment some more in the meantime. > > cheers -ben >

Sept. 9, 2016