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;;;; foreign.test --- FFI. -*- mode: scheme; coding: utf-8; -*-
;;;;
;;;; Copyright (C) 2010 Free Software Foundation, Inc.
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;;
;;;; This library is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;;;
;;; See also ../standalone/test-ffi for FFI tests.
;;;
(define-module (test-foreign)
#:use-module (system foreign)
#:use-module (rnrs bytevectors)
#:use-module (srfi srfi-1)
#:use-module (test-suite lib))
(with-test-prefix "null pointer"
(pass-if "zero"
(= 0 (pointer-address %null-pointer)))
(pass-if "null pointer identity"
(eq? %null-pointer (make-pointer 0)))
(pass-if "null-pointer? %null-pointer"
(null-pointer? %null-pointer))
(pass-if-exception "pointer->bytevector %null-pointer"
exception:null-pointer-error
(pointer->bytevector %null-pointer 7)))
(with-test-prefix "make-pointer"
(pass-if "address preserved"
(= 123 (pointer-address (make-pointer 123)))))
(with-test-prefix "pointer<->bytevector"
(pass-if "bijection"
(let ((bv #vu8(0 1 2 3 4 5 6 7)))
(equal? (pointer->bytevector (bytevector->pointer bv)
(bytevector-length bv))
bv)))
(pass-if "pointer from bits"
(let* ((bytes (iota (sizeof '*)))
(bv (u8-list->bytevector bytes)))
(= (pointer-address
(make-pointer (bytevector-uint-ref bv 0 (native-endianness)
(sizeof '*))))
(fold-right (lambda (byte address)
(+ byte (* 256 address)))
0
bytes))))
(pass-if "dereference-pointer"
(let* ((bytes (iota (sizeof '*)))
(bv (u8-list->bytevector bytes)))
(= (pointer-address
(dereference-pointer (bytevector->pointer bv)))
(fold-right (lambda (byte address)
(+ byte (* 256 address)))
0
bytes)))))
(with-test-prefix "structs"
(pass-if "parse-c-struct"
(let ((layout (list int64 uint8))
(data (list -300 43)))
(equal? (parse-c-struct (make-c-struct layout data)
layout)
data))))
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