examples.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/
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       ---
       examples.lisp (2705B)
       ---
            1 ;;;; -*- Mode: lisp; indent-tabs-mode: nil -*-
            2 ;;;
            3 ;;; examples.lisp --- Simple test examples of CFFI.
            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 (defpackage #:cffi-examples
           29   (:use #:cl #:cffi)
           30   (:export
           31    #:run-examples
           32    #:sqrtf
           33    #:getenv))
           34 
           35 (in-package #:cffi-examples)
           36 
           37 ;; A simple libc function.
           38 (defcfun "sqrtf" :float
           39   (n :float))
           40 
           41 ;; This definition uses the STRING type translator to automatically
           42 ;; convert Lisp strings to foreign strings and vice versa.
           43 (defcfun "getenv" :string
           44   (name :string))
           45 
           46 ;; Calling a varargs function.
           47 (defun sprintf-test ()
           48   "Test calling a varargs function."
           49   (with-foreign-pointer-as-string ((buf buf-size) 255)
           50     (foreign-funcall
           51      "snprintf" :pointer buf :int buf-size
           52      :string "%d %f #x%x!" :int 666
           53      :double (coerce pi 'double-float)
           54      :unsigned-int #xcafebabe
           55      :void)))
           56 
           57 ;; Defining an emerated type.
           58 (defcenum test-enum
           59   (:invalid 0)
           60   (:positive 1)
           61   (:negative -1))
           62 
           63 ;; Use the absolute value function to test keyword/enum translation.
           64 (defcfun ("abs" c-abs) test-enum
           65   (n test-enum))
           66 
           67 (defun cffi-version ()
           68   (asdf:component-version (asdf:find-system 'cffi)))
           69 
           70 (defun run-examples ()
           71   (format t "~&;;; CFFI version ~A on ~A ~A:~%"
           72           (cffi-version) (lisp-implementation-type)
           73           (lisp-implementation-version))
           74   (format t "~&;; shell:             ~A~%" (getenv "SHELL"))
           75   (format t "~&;; sprintf test:      ~A~%" (sprintf-test))
           76   (format t "~&;; (c-abs :positive): ~A~%" (c-abs :positive))
           77   (format t "~&;; (c-abs :negative): ~A~%" (c-abs :negative))
           78   (force-output))