gethostname.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 --- gethostname.lisp (2112B) --- 1 ;;;; -*- Mode: lisp; indent-tabs-mode: nil -*- 2 ;;; 3 ;;; gethostname.lisp --- A simple CFFI example. 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 ;;;# CFFI Example: gethostname binding 29 ;;; 30 ;;; This is a very simple CFFI example that illustrates calling a C 31 ;;; function that fills in a user-supplied string buffer. 32 33 (defpackage #:cffi-example-gethostname 34 (:use #:common-lisp #:cffi) 35 (:export #:gethostname)) 36 37 (in-package #:cffi-example-gethostname) 38 39 ;;; Define the Lisp function %GETHOSTNAME to call the C 'gethostname' 40 ;;; function, which will fill BUF with up to BUFSIZE characters of the 41 ;;; system's hostname. 42 (defcfun ("gethostname" %gethostname) :int 43 (buf :pointer) 44 (bufsize :int)) 45 46 ;;; Define a Lispy interface to 'gethostname'. The utility macro 47 ;;; WITH-FOREIGN-POINTER-AS-STRING is used to allocate a temporary 48 ;;; buffer and return it as a Lisp string. 49 (defun gethostname () 50 (with-foreign-pointer-as-string ((buf bufsize) 255) 51 (%gethostname buf bufsize)))