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01ad5a7ba9
* libguile/foreign.c (sym_null_pointer_error): New variable. (null_pointer_error): New function. (scm_foreign_set_x): Raise an error if attempting to modify NULL_POINTER. (scm_foreign_to_bytevector): Use `null_pointer_error ()' instead of `scm_misc_error ()'. * test-suite/tests/foreign.test: New file. * test-suite/Makefile.am (SCM_TESTS): Add tests/foreign.test. * test-suite/lib.scm (exception:null-pointer-error): New variable.
57 lines
2 KiB
Scheme
57 lines
2 KiB
Scheme
;;;; foreign.test --- FFI. -*- mode: scheme; coding: utf-8; -*-
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;;;;
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;;;; Copyright (C) 2010 Free Software Foundation, Inc.
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;;;;
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free Software
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;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;;;
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;;; See also ../standalone/test-ffi for FFI tests.
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;;;
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(define-module (test-foreign)
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#:use-module (system foreign)
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#:use-module (rnrs bytevector)
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#:use-module (test-suite lib))
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(with-test-prefix "null pointer"
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(pass-if "zero"
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(= 0 (foreign-ref %null-pointer)))
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(pass-if-exception "foreign-set! %null-pointer"
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exception:null-pointer-error
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(foreign-set! %null-pointer 2))
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(pass-if "foreign-set! other-null-pointer"
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(let ((f (bytevector->foreign (make-bytevector 2))))
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(and (not (= 0 (foreign-ref f)))
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(begin
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(foreign-set! f 0)
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(= 0 (foreign-ref f)))
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(begin
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;; Here changing the pointer value of F is perfectly valid.
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(foreign-set! f 777)
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(= 777 (foreign-ref f))))))
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(pass-if-exception "foreign->bytevector %null-pointer"
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exception:null-pointer-error
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(foreign->bytevector %null-pointer))
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(pass-if-exception "foreign->bytevector other-null-pointer"
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exception:null-pointer-error
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(let ((f (bytevector->foreign (make-bytevector 2))))
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(foreign-set! f 0)
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(foreign->bytevector f))))
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