[Scilab-users] output buffer

[Jean-Yves Baudais]

Hello,


Le 17/06/2022 à 23:45, Stephane Mottelet a écrit :
> The buffer size is not set by Scilab and hence is always the default for 
> a given platform (it can be different for macOS, Linux, Windows). I 
> suppose you need to increase or decrease it for a given application?


It is just for convenience. Here a better explanation. During 
simulation, I write some variables on file (used latter for statistical 
analysis) and I use to prepare and test the post-processing using the 
partial output data. Scilab does not write the data one by one, but by 
block of size 4096. The following code shows this behaviour.


--> function stupidWrite(fd,n,a)
--> for i=1:n mfprintf(fd,"%d",a); end
--> endfunction
--> fd=mopen("test.am","a");
--> stupidWrite(fd,4096,1);
--> unix_g("cat test.am | wc ");
  ans  =
   "      0       0       0"
--> stupidWrite(fd,1,2);
--> unix_g("cat test.am | wc ");
  ans  =
   "      0       1    4096"
--> mclose(fd)
--> unix_g("cat test.am |wc ")
  ans  =
   "      0       1    4097"


With the C language, the size of the output buffer is managed using 
setvbuf. It seems that there is no interface for C-coded version of 
setvbuf (contrary to many input/output C function).

So my question is: "is it possible to manage the size of the output 
buffer in Scilab?"

The solution I found is to mopen and mclose the file each time I want to 
write something. Is there another solution?

Thanks,

--Jean-Yves