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;;;; -*- Mode: lisp; indent-tabs-mode: nil -*-
;;;
;;; examples.lisp --- Simple test examples of CFFI.
;;;
;;; 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.
;;;
(defpackage #:cffi-examples
(:use #:cl #:cffi)
(:export
#:run-examples
#:sqrtf
#:getenv))
(in-package #:cffi-examples)
;; A simple libc function.
(defcfun "sqrtf" :float
(n :float))
;; This definition uses the STRING type translator to automatically
;; convert Lisp strings to foreign strings and vice versa.
(defcfun "getenv" :string
(name :string))
;; Calling a varargs function.
(defun sprintf-test ()
"Test calling a varargs function."
(with-foreign-pointer-as-string ((buf buf-size) 255)
(foreign-funcall
"snprintf" :pointer buf :int buf-size
:string "%d %f #x%x!" :int 666
:double (coerce pi 'double-float)
:unsigned-int #xcafebabe
:void)))
;; Defining an emerated type.
(defcenum test-enum
(:invalid 0)
(:positive 1)
(:negative -1))
;; Use the absolute value function to test keyword/enum translation.
(defcfun ("abs" c-abs) test-enum
(n test-enum))
(defun cffi-version ()
(asdf:component-version (asdf:find-system 'cffi)))
(defun run-examples ()
(format t "~&;;; CFFI version ~A on ~A ~A:~%"
(cffi-version) (lisp-implementation-type)
(lisp-implementation-version))
(format t "~&;; shell: ~A~%" (getenv "SHELL"))
(format t "~&;; sprintf test: ~A~%" (sprintf-test))
(format t "~&;; (c-abs :positive): ~A~%" (c-abs :positive))
(format t "~&;; (c-abs :negative): ~A~%" (c-abs :negative))
(force-output))
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