[chuck-users] Communicate with a C++ programme (Guille Elias Alonso)

[Guille Elias Alonso]

That makes everything much simpler and it's probably faster thanks!

> From: prc at CS.Princeton.EDU
> Date: Thu, 12 May 2016 13:34:23 -0700
> To: chuck-users at lists.cs.princeton.edu
> Subject: Re: [chuck-users] Communicate with a C++ programme (Guille Elias	Alonso)
> 
> It’s pretty old-school, but often my solution for this is to pipe text output of ChucK
> into stdin of the Cxx program in a terminal.  You need to be sure to send to chout
> and not just use the <<< “PRINT THIS” >>>; form, because the latter prints to
> stderr, not stdout.  Here’s a simple ChucK program that writes a random number
> to stdout every 16 ms.  Below that is a very simple C program to read and report.
> You’d need to have your C++ program read from stdin and use the argument(s)
> accordingly.  You’d invoke the whole thing like this:
> 
> >     chuck MyChucK.ck | myCProgram
> 
> where myCProgram is your compiled C++ executable.
> 
> // MyChucK.ck     ChucK Program to write random numbers to stdout
> while (true)  {
>     16::ms => now;
>     chout <= Std.ftoa(Math.random2f(0.0,3.14159),4); // 4 decimal places
>     chout <= "\n"; // newline
>     chout.flush(); // be sure and do this!!
> }
> //   END OF CHUCK PROGRAM TO WRITE FLOATS
> 
> // myCProgram.c     a C Program to read single floats from Stdin
> #include <stdlib.h>
> #include <stdio.h>
> #include <string.h>
> 
> int main()  {
>     char inString[256];
>     float inVal;
>     while (1)  {
>         fgets(inString,256,stdin);  // read standard input
>         inVal = atof(inString);     // peel off float value
>         inString[strlen(inString)-1] = 0; // kill the newline
>         printf("Got it!! %s, %f\n", inString, inVal); // report!!
>     }
>     return 1;
> }
> // END C PROGRAM TO READ FLOATS
> 
> 
> 
> > On May 10, 2016, at 2:09 PM, chuck-users-request at lists.cs.princeton.edu wrote:
> > 
> >   1. Communicate with a C++ programme (Guille Elias Alonso)
> >   2. Re: Communicate with a C++ programme (Stephen D Beck)
> >   3. Re: Communicate with a C++ programme (Guille Elias Alonso)
> > 
> > 
> > ----------------------------------------------------------------------
> > 
> > Message: 1
> > Date: Tue, 10 May 2016 22:53:48 +0200
> > From: Guille Elias Alonso <guille_elias_alonso at hotmail.com>
> > To: "chuck-users at lists.cs.princeton.edu"
> > 	<chuck-users at lists.cs.princeton.edu>
> > Subject: [chuck-users] Communicate with a C++ programme
> > Message-ID: <DUB125-W7866DF5CBF0938708FB36CB3710 at phx.gbl>
> > Content-Type: text/plain; charset="iso-8859-1"
> > 
> > Hello guys,
> > I'm writing a programme that analyses the micro input and makes some actions according to the analysis. Everything about the analysis is written in Chuck. The analysis of the micro signal gives a single number every 16 ms, and this number has to be sent to the C++ programme but I don't know how I can connect the two parts. This application is highly time-sensitive so I need a fast way of communicating.
> > I had read about these OSC events but it seems it's only for Chuck programmes receiving input from the outside and I want just the opposite. I've also thought about some mechanism of shared memory between the Chuck programme and the C++ programme but I don't see anywhere some way of implementing that with Chuck. Do you have any ideas?
> > Thanks,Guillermo 		 	   		  
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