Find out file extension of a file from within the file.

I have a build I want to give someone that contain protected models and I have a script that I also want to protect. Right now I have a parameter being passed in to say which library I want to ready from, but I don't like that. Is there any way that I can see if the file that is being run is a .m or a .p? If I can do that then I can base my choice on that. I tried using mfilename and it didn't work and I tried:

a = mfilename('fullpath');
[~,~,ext] = fileparts(a);

but that didn't work either. I don't want to use dir, since I'll have both versions on my computer. Is there anything I can do to get the file extension of the file that I run?

Answer 1

[Sean de Wolski]

You could fileparts the output from which.

[~,~,ext] = fileparts(which(mfilename))

[Sasquatch]

You have wisdom that one strives for! Thanks!