World: r4wp
[#Red] Red language group
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DocKimbel 3-Jul-2013 [9269] | Bo, congrats! Hope you'll demo it at the devcon. |
Pekr 3-Jul-2013 [9270] | btw - my brother ordered 3x Arduino kit for our friends, and for me he ordered BeagleBone Black. So I will see, if I can get Red programs running on it :-) |
DocKimbel 3-Jul-2013 [9271x2] | Red should run just fine on the BB Black. |
My motion detection executable on the Pi is 30KB. The same executable compiled for Windows is 15KB (50% the size). Red currently emits only the standard ARM opcodes, so 32-bit per instruction. We'll add support in the future for Thumb mode (more compact instruction set). In the meantime, you can try to activate the literal pools by adding the following option to the Linux-ARM config block (in %config.r): literal-pool?: yes That should both reduce final binary size and give you a little speed improvement. But be sure to test is well as this mode has not been much used yet. Also, it might fail to compile if you use very big functions, or a lot of code in global context. | |
Kaj 3-Jul-2013 [9273x8] | Bo, your make-c-string leaks memory. read-file will allocate memory of the size to fit the file contents |
Xie, read-file is a Red/System function that does much more than fread. It returns the file content itself as a string, not the number of bytes read | |
fread is mapped directly to read-array | |
Bo, your file must contain "1". The second number is the address where it is read into memory | |
Remember that a c-string! is a pointer to a memory address. Much like a string! in REBOL is a reference to the storage of a series value that can be referenced by multiple string!s, each with their own index | |
If you want to convert the content of your text file to an integer, my C library binding provides to-integer, just like in REBOL | |
Petr, the Red/System READ functions and the higher Red abstractions on top of it are already here. As I said yesterday, Doc is free to use parts of it when he makes a more elaborate I/O framework in Red | |
You're not wasting any time on them, are you (except by talking about them)? I need them now, and so do others | |
Bo 3-Jul-2013 [9281] | Thanks for the advice and comments, everyone! I'm feeling really good about Red/System and the greater Red ecosystem now that I have a project under my belt. Kaj's been an immense help and I thank others also for their input! |
Arnold 3-Jul-2013 [9282] | No console input command yet for Red or Red/System prin "Number of sweets:" number-of-sweets: input number-of-kids: ask "How many kids?" Is the support planned? Will work nice with the kids sharing candy storyline making their program better. |
Kaj 3-Jul-2013 [9283] | Yes, there is, in my I/O binding and interpreter builds. The basic console has very little |
Bo 3-Jul-2013 [9284] | Kaj, you said that 'read-file in Red/System automatically defines a large enough memory space for the file. How about 'read-file-binary? That one has a 'size parameter. How can one determine how big to make that 'size parameter before reading the file? |
Kaj 3-Jul-2013 [9285x3] | You don't make it any size. It works the same as read-file and the READ function in REBOL: it allocates the storage for you |
In the case of read-string you get a c-string!, so you can get the size with LENGTH?. For read-file-binary that's not possible, so you pass a pointer to an integer! to be informed about the read size | |
Sorry, read-file | |
Bo 3-Jul-2013 [9288] | Thanks for that. Another detail I wasn't understanding correctly. |
Paul 3-Jul-2013 [9289] | Where is RED at these days in comparison to R3? |
Kaj 3-Jul-2013 [9290x2] | Glass half full, half empty :-) |
What are you interested in? | |
Paul 3-Jul-2013 [9292] | I guess more or less what is the major usuability items that are still lacking in each. Maybe you can answer that towards what RED still lacks as a major need. |
Kaj 3-Jul-2013 [9293] | Garbage collector, error trapping, objects, floating point, PARSE, other complex datatypes |
Paul 3-Jul-2013 [9294] | Some major ones there. |
Kaj 3-Jul-2013 [9295] | Yep, that's the glass half empty |
Paul 3-Jul-2013 [9296x2] | Thanks Kaj. |
There a timeline on those? | |
Kaj 3-Jul-2013 [9298] | More like an order than an ETA, but you'd have to ask Doc |
Paul 3-Jul-2013 [9299x2] | ok |
Good info - thanks. | |
DocKimbel 3-Jul-2013 [9301] | Hi Paul, we have some Windows drivers issues for you to solve, up to the challenge? ;-) |
Paul 3-Jul-2013 [9302x3] | Hehe. Possibly but got a new job that is hitting me hard. |
Working mostly in SAN/NAS Cloud technologies. | |
What is your most pressing windows driver issue? | |
DocKimbel 3-Jul-2013 [9305] | Kaj will explain it to you. :-) |
Paul 3-Jul-2013 [9306] | ok |
DocKimbel 3-Jul-2013 [9307] | Basically, we have a minifilter driver in Red/System that can be installed through an INF file, but when started (using `sc start`) we get either error 1058 or error 2 (File not found). |
Paul 3-Jul-2013 [9308x2] | SC is the service control manager command line utility |
Is the process created as a service? | |
DocKimbel 3-Jul-2013 [9310] | The INF file installs the filter driver as a service, yes. |
Paul 3-Jul-2013 [9311x2] | ok |
What is the verbose for 1058? | |
DocKimbel 3-Jul-2013 [9313] | Just thinking loud, does that mean that the filter driver has to respond to service commands? |
Paul 3-Jul-2013 [9314] | Yes most likely. |
DocKimbel 3-Jul-2013 [9315] | 1058: I don't know, that's Kaj's error. |
Paul 3-Jul-2013 [9316] | ok |
DocKimbel 3-Jul-2013 [9317] | Hmm, I guess we should try then implementing a suitable callback to answer properly to SCM commands... |
Paul 3-Jul-2013 [9318] | Yes, still not sure what SC seen as file not found though. But a process monitor from systems internals might tell us that. |
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