52 lines
1.9 KiB
Common Lisp
52 lines
1.9 KiB
Common Lisp
;;;; -*- Mode: lisp; indent-tabs-mode: nil -*-
|
|
;;;
|
|
;;; union.lisp --- Tests on C unions.
|
|
;;;
|
|
;;; Copyright (C) 2005-2006, James Bielman <jamesjb@jamesjb.com>
|
|
;;;
|
|
;;; Permission is hereby granted, free of charge, to any person
|
|
;;; obtaining a copy of this software and associated documentation
|
|
;;; files (the "Software"), to deal in the Software without
|
|
;;; restriction, including without limitation the rights to use, copy,
|
|
;;; modify, merge, publish, distribute, sublicense, and/or sell copies
|
|
;;; of the Software, and to permit persons to whom the Software is
|
|
;;; furnished to do so, subject to the following conditions:
|
|
;;;
|
|
;;; The above copyright notice and this permission notice shall be
|
|
;;; included in all copies or substantial portions of the Software.
|
|
;;;
|
|
;;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
;;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
;;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
;;; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
|
|
;;; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
|
;;; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
;;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
;;; DEALINGS IN THE SOFTWARE.
|
|
;;;
|
|
|
|
(in-package #:cffi-tests)
|
|
|
|
(defcunion uint32-bytes
|
|
(int-value :unsigned-int)
|
|
(bytes :unsigned-char :count 4))
|
|
|
|
(defctype uint32-bytes (:union uint32-bytes))
|
|
|
|
(defun int-to-bytes (n)
|
|
"Convert N to a list of bytes using a union."
|
|
(with-foreign-object (obj 'uint32-bytes)
|
|
(setf (foreign-slot-value obj 'uint32-bytes 'int-value) n)
|
|
(loop for i from 0 below 4
|
|
collect (mem-aref
|
|
(foreign-slot-value obj 'uint32-bytes 'bytes)
|
|
:unsigned-char i))))
|
|
|
|
(deftest union.1
|
|
(let ((bytes (int-to-bytes #x12345678)))
|
|
(cond ((equal bytes '(#x12 #x34 #x56 #x78))
|
|
t)
|
|
((equal bytes '(#x78 #x56 #x34 #x12))
|
|
t)
|
|
(t bytes)))
|
|
t)
|