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	---
	ttranslator-test.lisp (3565B)
	---
	1 ;;;; -- Mode: lisp; indent-tabs-mode: nil --
	2 ;;;
	3 ;;; translator-test.lisp --- Testing type translators.
	4 ;;;
	5 ;;; Copyright (C) 2005-2006, James Bielman <[email protected]>
	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-translator-test
	29 (:use #:common-lisp #:cffi))
	30
	31 (in-package #:cffi-translator-test)
	32
	33 ;;;# Verbose Pointer Translator
	34 ;;;
	35 ;;; This is a silly type translator that doesn't actually do any
	36 ;;; translating, but it prints out a debug message when the pointer is
	37 ;;; converted to/from its foreign representation.
	38
	39 (define-foreign-type verbose-pointer-type ()
	40 ()
	41 (:actual-type :pointer))
	42
	43 (defmethod translate-to-foreign (value (type verbose-pointer-type))
	44 (format debug-io "~&;; to foreign: VERBOSE-POINTER: ~S~%" value)
	45 value)
	46
	47 (defmethod translate-from-foreign (value (type verbose-pointer-type))
	48 (format debug-io "~&;; from foreign: VERBOSE-POINTER: ~S~%" value)
	49 value)
	50
	51 ;;;# Verbose String Translator
	52 ;;;
	53 ;;; A VERBOSE-STRING extends VERBOSE-POINTER and converts Lisp strings
	54 ;;; C strings. If things are working properly, both type translators
	55 ;;; should be called when converting a Lisp string to/from a C string.
	56 ;;;
	57 ;;; The translators should be called most-specific-first when
	58 ;;; translating to C, and most-specific-last when translating from C.
	59
	60 (define-foreign-type verbose-string-type (verbose-pointer-type)
	61 ()
	62 (:simple-parser verbose-string))
	63
	64 (defmethod translate-to-foreign ((s string) (type verbose-string-type))
	65 (let ((value (foreign-string-alloc s)))
	66 (format debug-io "~&;; to foreign: VERBOSE-STRING: ~S -> ~S~%" s v…
	67 (values (call-next-method value type) t)))
	68
	69 (defmethod translate-to-foreign (value (type verbose-string-type))
	70 (if (pointerp value)
	71 (progn
	72 (format debug-io "~&;; to foreign: VERBOSE-STRING: ~S -> ~:*~S…
	73 (values (call-next-method) nil))
	74 (error "Cannot convert ~S to a foreign string: it is not a Lisp ~
	75 string or pointer." value)))
	76
	77 (defmethod translate-from-foreign (ptr (type verbose-string-type))
	78 (let ((value (foreign-string-to-lisp (call-next-method))))
	79 (format debug-io "~&;; from foreign: VERBOSE-STRING: ~S -> ~S~%" p…
	80 value))
	81
	82 (defmethod free-translated-object (ptr (type verbose-string-type) free-p)
	83 (when free-p
	84 (format debug-io "~&;; freeing VERBOSE-STRING: ~S~%" ptr)
	85 (foreign-string-free ptr)))
	86
	87 (defun test-verbose-string ()
	88 (foreign-funcall "getenv" verbose-string "SHELL" verbose-string))