On Fri, Apr 16, 2004 at 09:40:21PM -0700, Tim Rowledge wrote:
> OK, I'm going to propose a couple of extensions to the FilePlugin. I'm
> pretty sure it is possible to wrap them in such a way that older VMs
> will be ok and of course old images on a new vm will just work as
> before.
> 
> I've done a test build of prims to implement primitiveFileExists and
> primitiveDirectoryExists. They're essentially identical and it might be
> possible to merge them, depending on the various platform constraints.
> On RISC OS it would be obvious and trivial but I really don't want to
> jump to conclusion about other machines. (Apart from the obvious
> truism that they're clearly inferior :-) )
> 
> As an example:-
> 
> primitiveDirectoryExists

Tim, you might want to take a look through DirectoryPlugin (on SqueakMap).
This provides a number of performance-related primitives for files and
directories, including #fileExists: and #directoryExists. Feel free to lift
any that look relevant.

Sorry, I didn't do the RISC OS implementations...

Dave