79 lines
2.6 KiB
Common Lisp
79 lines
2.6 KiB
Common Lisp
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;;;; -*- Mode: lisp; indent-tabs-mode: nil -*-
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;;;
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;;; examples.lisp --- Simple test examples of CFFI.
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;;;
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;;; Copyright (C) 2005-2006, James Bielman <jamesjb@jamesjb.com>
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;;;
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;;; Permission is hereby granted, free of charge, to any person
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;;; obtaining a copy of this software and associated documentation
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;;; files (the "Software"), to deal in the Software without
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;;; restriction, including without limitation the rights to use, copy,
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;;; modify, merge, publish, distribute, sublicense, and/or sell copies
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;;; of the Software, and to permit persons to whom the Software is
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;;; furnished to do so, subject to the following conditions:
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;;;
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;;; The above copyright notice and this permission notice shall be
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;;; included in all copies or substantial portions of the Software.
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;;;
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;;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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;;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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;;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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;;; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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;;; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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;;; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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;;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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;;; DEALINGS IN THE SOFTWARE.
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;;;
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(defpackage #:cffi-examples
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(:use #:cl #:cffi)
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(:export
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#:run-examples
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#:sqrtf
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#:getenv))
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(in-package #:cffi-examples)
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;; A simple libc function.
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(defcfun "sqrtf" :float
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(n :float))
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;; This definition uses the STRING type translator to automatically
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;; convert Lisp strings to foreign strings and vice versa.
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(defcfun "getenv" :string
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(name :string))
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;; Calling a varargs function.
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(defun sprintf-test ()
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"Test calling a varargs function."
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(with-foreign-pointer-as-string ((buf buf-size) 255)
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(foreign-funcall
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"snprintf" :pointer buf :int buf-size
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:string "%d %f #x%x!" :int 666
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:double (coerce pi 'double-float)
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:unsigned-int #xcafebabe
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:void)))
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;; Defining an emerated type.
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(defcenum test-enum
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(:invalid 0)
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(:positive 1)
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(:negative -1))
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;; Use the absolute value function to test keyword/enum translation.
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(defcfun ("abs" c-abs) test-enum
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(n test-enum))
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(defun cffi-version ()
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(asdf:component-version (asdf:find-system 'cffi)))
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(defun run-examples ()
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(format t "~&;;; CFFI version ~A on ~A ~A:~%"
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(cffi-version) (lisp-implementation-type)
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(lisp-implementation-version))
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(format t "~&;; shell: ~A~%" (getenv "SHELL"))
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(format t "~&;; sprintf test: ~A~%" (sprintf-test))
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(format t "~&;; (c-abs :positive): ~A~%" (c-abs :positive))
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(format t "~&;; (c-abs :negative): ~A~%" (c-abs :negative))
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(force-output))
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