Checking validity of a filepath

Is there a function I can use to check that a file exists, given a filepath as input?
What I'm trying to do is check that a sound file exists. With images, you could check the dimensions or something to check that it loaded properly, but with sounds, I know of no corresponding object in KAG that can be manipulated. Only a playSound() function that takes a sound filepath directly as an argument. If it doesn't find the file, it just doesn't play a sound, but I want to check this beforehand.

 

Code:

bool isFileValid(string file)
{
CFileMatcher matcher("myaudiofile.ogg");
if (matcher.getFirst() != "") return true;
else return false;
}

Maybe will that work? I've never used file matchers but I guess it works like that.

 

As it turned out, CFilematcher returns the nearest match in the whole Base directory for a given path or filename. So I had to first search, then require that the result is exactly equal to the input (or it could be some near approximation turning up a false positive). Is there any place to find documentations for all the functions in manual/functions.txt and objects.txt?

 

Maybe try my solution without the ".ogg" and check if the result has the ".ogg" within. This won't work with extensionless files though.