contrib/sb-posix/designator.lisp

   1 (in-package :sb-posix-internal)
   2 (defmacro define-designator (name result &body conversions)
   3   (let ((type `(quote (or ,@(mapcar #'car conversions))))
   4         (typename (intern (format nil "~A-~A"
   5                                   (symbol-name name)
   6                                   (symbol-name :designator))
   7                           #.*package*)))
   8     `(progn
   9       (eval-when (:compile-toplevel :load-toplevel :execute)
  10         (deftype ,typename () ,type)
  11         (setf (get ',name 'designator-type) ',result))
  12       (defun ,(intern (symbol-name name) :sb-posix) (,name)
  13         (declare (type ,typename ,name))
  14         (etypecase ,name
  15           ,@conversions)))))
  16
  17 (define-designator filename c-string
  18   (pathname  (namestring (translate-logical-pathname filename)))
  19   (string filename))
  20
  21 (define-designator file-descriptor (integer 32)
  22   (sb-impl::file-stream (sb-impl::fd-stream-fd file-descriptor))
  23   (fixnum file-descriptor))
  24