union.lisp - clic - Clic is an command line interactive client for gopher written in Common LISP (HTM) git clone git://bitreich.org/clic/ git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/clic/ (DIR) Log (DIR) Files (DIR) Refs (DIR) Tags (DIR) README (DIR) LICENSE --- union.lisp (1994B) --- 1 ;;;; -*- Mode: lisp; indent-tabs-mode: nil -*- 2 ;;; 3 ;;; union.lisp --- Tests on C unions. 4 ;;; 5 ;;; Copyright (C) 2005-2006, James Bielman <jamesjb@jamesjb.com> 6 ;;; 7 ;;; Permission is hereby granted, free of charge, to any person 8 ;;; obtaining a copy of this software and associated documentation 9 ;;; files (the "Software"), to deal in the Software without 10 ;;; restriction, including without limitation the rights to use, copy, 11 ;;; modify, merge, publish, distribute, sublicense, and/or sell copies 12 ;;; of the Software, and to permit persons to whom the Software is 13 ;;; furnished to do so, subject to the following conditions: 14 ;;; 15 ;;; The above copyright notice and this permission notice shall be 16 ;;; included in all copies or substantial portions of the Software. 17 ;;; 18 ;;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19 ;;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 ;;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 21 ;;; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 22 ;;; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 23 ;;; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 24 ;;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 25 ;;; DEALINGS IN THE SOFTWARE. 26 ;;; 27 28 (in-package #:cffi-tests) 29 30 (defcunion uint32-bytes 31 (int-value :unsigned-int) 32 (bytes :unsigned-char :count 4)) 33 34 (defctype uint32-bytes (:union uint32-bytes)) 35 36 (defun int-to-bytes (n) 37 "Convert N to a list of bytes using a union." 38 (with-foreign-object (obj 'uint32-bytes) 39 (setf (foreign-slot-value obj 'uint32-bytes 'int-value) n) 40 (loop for i from 0 below 4 41 collect (mem-aref 42 (foreign-slot-value obj 'uint32-bytes 'bytes) 43 :unsigned-char i)))) 44 45 (deftest union.1 46 (let ((bytes (int-to-bytes #x12345678))) 47 (cond ((equal bytes '(#x12 #x34 #x56 #x78)) 48 t) 49 ((equal bytes '(#x78 #x56 #x34 #x12)) 50 t) 51 (t bytes))) 52 t)