World: r3wp
[Red] Red language group
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GrahamC 7-Feb-2012 [4803] | And use google to index |
Dockimbel 7-Feb-2012 [4804] | Right, or build a simple search service using github's public API. |
Oldes 7-Feb-2012 [4805] | After adding the float! support, the main thing is a series! datatyte. Should we wait for Red to implement it properly or do we want ti in red/system as well? (I know I can use pointer math to access values, but it's not so easy for ordinary scripting) |
Dockimbel 7-Feb-2012 [4806] | Red/System is not meant for scripting but low-level and system programming. Red is for scripting, so series! support as well as all others scripting facilites will be provided by Red. |
Oldes 7-Feb-2012 [4807] | So what one can do now to help you move Red to usable state? :) |
Dockimbel 7-Feb-2012 [4808x2] | Red/System: already anwsered by me, Kaj and others (also, there's a todo list on red-lang.org for contributors that are searching for tasks to handle). |
Red: you need to wait a few weeks until the first alpha is out to start adding new datatypes. | |
Oldes 7-Feb-2012 [4810] | todo list - you mean the roadmap? |
Dockimbel 7-Feb-2012 [4811x2] | No, the one from here: http://www.red-lang.org/p/contributions.html |
(it's the "Community" menu, I guess I forgot to rename the page, will have to fix that) | |
GrahamC 7-Feb-2012 [4813] | @Oldes .. how about a black text on white background blogger theme! That would help a lot. |
Oldes 7-Feb-2012 [4814] | It does not sound like much creative work... you can just download some existing theme like http://www.bloggerthemes.net/heliumified/demo and tweek it a little bit... but it requires access to the site. |
Dockimbel 7-Feb-2012 [4815x2] | I very much like the Heroku style: http://www.heroku.comIf I could find a similar blogger theme, I would switch at once. |
I'm aware that the current theme is not always very readable, if someone with good design and CSS skills wants to tweak it, I'll see if I can give you access to the admin form. | |
Pekr 7-Feb-2012 [4817x2] | I can agree with Oldes, that when wrapping some C stuff, things like series would be handy - namely - a block! type, to have an array, plus accompanying series handling functions. But - where would that end? :-) Wouldn't we then want also a path, etc. to work? |
I am for a quick solution to appear, so - Red. If that turns out being slow, there is a later chance to reimplement some stuff in Red/System. Of course such aproach itself does not bring more comfort to Red/System, as e.g. availability of array type would be for e.g. But there are some priorities .... | |
Oldes 7-Feb-2012 [4819] | Arrays are possible in reds, just it's not so clear like in Rebol:) Example: *count: declare int-ptr! query: MagickQueryFormats "*" *count count: *count/value ?? ["======================================"] ?? ["=== Supported image formats: " count ] while [count > 0][ ?? query/item query: query + 1 count: count - 1 ] |
Kaj 7-Feb-2012 [4820x4] | Ok, though I can't think of anything I need to write in R/S at present. I need GUI based apps though |
A cross-platform GTK+ binding is available, with a REBOL like dialect | |
if one wants to test Red/System: port some simple C stuff? | |
Yes, that's a good approach | |
Pekr 11-Feb-2012 [4824x7] | I am trying to wrap our LED screen control dll. I am not sure how well it is defined, as LED Studio and surrounding SW is rather weak and sometimes crashes, but I tried in R2, thinking I again reached some R2 DLL interfacing limit/bug, and am trying now in Red/System. Well, my first attempt to wrap some DLL functions here. So - I can turn-on/off led screen, even if I don't set COM port, open-sending-card, etc. But when I try to call functions to get e.g. brightness, contrast, it crashes. Those funcs are defined as e.g.: typedef int (WINAPI *LSN_GETBRIGHT)(); // 0..100 typedef bool (WINAPI *LSN_SETBRIGHT)(int); typedef int (WINAPI *LSN_GETCOLORTEMP)(int);//ScreenNumb typedef bool (WINAPI *LSN_SETCOLORTEMP)(int,int);//ScreenNumb,nColorId 0,1,2,3 None of above functions work for me, although above code is from sources to LEDSet application, where those funcitons work, those are just being set via dialog boxes (which I can invoke even from Red/System, so those are part of DLL ... My definitions are: led-get-brightness: "LSN_GetBright" [ return: [integer!] ] led-set-brightness: "LSN_SetBright" [ brightness [integer!] return: [integer!] ] led-get-color-temperature: "LSN_GetColorTemp" [ screen-number [integer!] return: [integer!] ] etc. So what coul be causing run time error? I am running on a PC, where I don't have internal LED screen communication card. I thought, that DLL functionality might check for the screen, can't find it, and so the app returns error, which does not fit return value - e.g. some error code/string, or a dialog box. But moving the exe to the PC where the card is, it i just the same - some functions work, I can see LED screen being turned on/off, but those brightness etc. don't .... |
The error I get is something like this: *** Runtime Error 99: unknown error *** at: 7572FC56h | |
Reading the docs, i have one question - could we say, that aliased sctructures are the same what we know as a literals in REBOL? I can imagine the declaration being : book: literal struct![] so instead of calling it a virtual datatype and suggesting to use exclamation mark to distinguish it in a code, it could as well be: 'book: literal struct! [] Anyway - it does not matter, just curious .... | |
Maybe one another question - I know Red/System is supposed to be closer to C, but it will be also used by those, who would like to proceed using Red itself (that is why I did not like the print-line, ?? vs print/prin) - so the question - why is there so many constructors, instead of one make! and e.g. a block format? I mean: declare struct! alias struct! #import for a library Intead of: make struct! make lit-struct! make routine! ? I will understand the answer of a type, that it is better to be understood by those knowing C language. So far, I can't e.g. understand, why a library is wrapped in a preprocessor kind of way, using #import, which does not fit those preprocessor things like #define, #ifdef, etc.? | |
Btw - once you add TYPE? function,I wonder how you distinguish declared struct! from an aliase one :-) I know that function will return integer, but you will surely print some name in the end, so will you come with an artificial type-name for an aliased struct to distinguish? | |
If it would be upon me, I would better try to stay consistent with the Red level - so if Red will have make!, Red/System should have make too, no matter how C users will aproach it. Those who will use Red/System, are going to use Red most probably too, so I can not see much reasons to differ, just because we can state - Red and Red/System are two different things :-) I am curious how you will keep up with such a differences in future, once Red layer becomes available :-) | |
c: 2 p/c: 1234 ;-- writes 123 (4 bytes) at 40000004h Isn't there a typo? Shouldn't it be - "writes 1234 (4 bytes) at 40000004h"? | |
Kaj 11-Feb-2012 [4831] | Looks like it was written with a sleep deficit :-) |
Pekr 11-Feb-2012 [4832] | just a small typo, so other than that, docs are good :-) |
Kaj 11-Feb-2012 [4833x2] | Literals are a quite generic concept from REBOL. An ALIAS is a much more specific thing: it's a name for a struct!. If you want to compare it to REBOL, you could say that it's bound to the struct, so not just a literal |
I wonder if TYPE would be a better name for it | |
Pekr 11-Feb-2012 [4835] | so that is has already a type, and the type is struct, whereas literal is just a literal? |
Kaj 11-Feb-2012 [4836] | There are no literals in Red/System, at least not as symbols |
Pekr 11-Feb-2012 [4837x3] | because "alias", although I am not a native english speaking person, in my understanding, is something already existing, which we reference. But a struct alias is just like a class, it is not structure yet. But, it does not probably matter. Simply put coming from REBOL I would like to see those two similar. Reading further in docs I can see, that REBOL can't be easily mapped to C, so some specialisties might be needed ... |
It is more of a philosophy, what is more confusing to whom. E.g. Carl proposes dialecting as the same word, being simply used in different context. In real life, it might work, but not sure about programming. E.g. 'copy in 'parse having slightly different aspects than 'copy in REBOL itself. That is why I thought that make! could be used even in Red/System, but not sure ... | |
The reason why I am also opting for such an aproach is, that there will be possibility to inline Red/System in Red itself, so it should look similar, where possible. I e.g. liked how Cyphre did JIT to R2 - the code still looks like REBOL, it is just a limited subset ... | |
Kaj 11-Feb-2012 [4840x3] | I share some of your uneasy feelings about the overuse of preprocessing constructs. I would like them to become first-class, but it's hard to come up with the best solutions |
I think Doc will say that we'll reconsider them in the Red/System rewrite in Red | |
Your binding looks quite good to me, but how is your #import defined, and how is WINAPI defined in the C code? | |
Pekr 11-Feb-2012 [4843] | Yes, that might actually happen, after all Red/System is the target, so new needs might show-up during the Red design, who knows .... |
Kaj 11-Feb-2012 [4844] | They will, and they have |
Pekr 11-Feb-2012 [4845] | I tried stdcall and iirc even cdecl. How do I find out? |
Kaj 11-Feb-2012 [4846x2] | It should probably be cdecl, and the WINAPI definition probably contains the answer. Did it make a difference? |
The issue looks to be that the C functions are defined as WINAPI pointers, instead of just WINAPI functions | |
Pekr 11-Feb-2012 [4848] | No, still error ... |
Kaj 11-Feb-2012 [4849] | Is LSN_GETBRIGHT really defined as LSN_GetBright, etc, or are the function names different? |
Pekr 11-Feb-2012 [4850x2] | maybe not, I found this: extern LSN_GETBRIGHT fpGetBright ; |
Does it mean, that the real func name is fpGetBright? | |
Kaj 11-Feb-2012 [4852] | I think so, but the C code is also doing an indirection through a function pointer, hence the fp |
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