Getting a key's read syntax as a string

[John Mastro]

Hello Emacsers,

Is there a programmatic way to get a string representing a
key-with-modifier's read syntax, given its integer value?

Perhaps more clearly, I'm looking for something that would work like
this:

    (key-read-syntax ?\C-a) ;=> "?\C-a" or "C-a"
    (key-read-syntax ?\M-f) ;=> "?\M-f" or "M-f"

I checked the manual but didn't come across anything.

Thanks

-- 
john