[forther] checking file and folder existence

[rt4all at hetnet.nl]

Hi all,

Are there iForth versions for
SwiftForth  IS-DIR ( z-addr -- flag )   and  IS-FILE ( z-addr -- flag )
or VFX  dirExists?	\ caddr len -- flag    and   FileExist?    \ caddr len -- flag

I need to check the existence of nib files just prior to an attempt showing them
on the screen in macOS coco-i4 SHOW.NIB

Thank you, -roelf