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#!/bin/sh
exec guile -q -s "$0" "$@"
!#
;;; test-ffi --- Foreign function interface. -*- Scheme -*-
;;;
;;; Copyright (C) 2010, 2017 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
(use-modules (system foreign)
(rnrs bytevectors)
(srfi srfi-1)
(srfi srfi-26))
(define lib
(dynamic-link (string-append (getenv "builddir") "/libtest-ffi")))
(define failed? #f)
(define-syntax test
(syntax-rules ()
((_ exp res)
(let ((expected res)
(actual exp))
(if (not (equal? actual expected))
(begin
(set! failed? #t)
(format (current-error-port)
"bad return from expression `~a': expected ~A; got ~A~%"
'exp expected actual)))))))
;;;
;;; No args
;;;
(define f-v-
(pointer->procedure void (dynamic-func "test_ffi_v_" lib) '()))
(test (f-v-) *unspecified*)
(define f-s8-
(pointer->procedure int8 (dynamic-func "test_ffi_s8_" lib) '()))
(test (f-s8-) -100)
(define f-u8-
(pointer->procedure uint8 (dynamic-func "test_ffi_u8_" lib) '()))
(test (f-u8-) 200)
(define f-s16-
(pointer->procedure int16 (dynamic-func "test_ffi_s16_" lib) '()))
(test (f-s16-) -20000)
(define f-u16-
(pointer->procedure uint16 (dynamic-func "test_ffi_u16_" lib) '()))
(test (f-u16-) 40000)
(define f-s32-
(pointer->procedure int32 (dynamic-func "test_ffi_s32_" lib) '()))
(test (f-s32-) -2000000000)
(define f-u32-
(pointer->procedure uint32 (dynamic-func "test_ffi_u32_" lib) '()))
(test (f-u32-) 4000000000)
(define f-s64-
(pointer->procedure int64 (dynamic-func "test_ffi_s64_" lib) '()))
(test (f-s64-) -2000000000)
(define f-u64-
(pointer->procedure uint64 (dynamic-func "test_ffi_u64_" lib) '()))
(test (f-u64-) 4000000000)
;;;
;;; One u8 arg
;;;
(define f-v-u8
(pointer->procedure void (dynamic-func "test_ffi_v_u8" lib) (list uint8)))
(test (f-v-u8 10) *unspecified*)
(define f-s8-u8
(pointer->procedure int8 (dynamic-func "test_ffi_s8_u8" lib) (list uint8)))
(test (f-s8-u8 10) -90)
(define f-u8-u8
(pointer->procedure uint8 (dynamic-func "test_ffi_u8_u8" lib) (list uint8)))
(test (f-u8-u8 10) 210)
(define f-s16-u8
(pointer->procedure int16 (dynamic-func "test_ffi_s16_u8" lib) (list uint8)))
(test (f-s16-u8 10) -19990)
(define f-u16-u8
(pointer->procedure uint16 (dynamic-func "test_ffi_u16_u8" lib) (list uint8)))
(test (f-u16-u8 10) 40010)
(define f-s32-u8
(pointer->procedure int32 (dynamic-func "test_ffi_s32_u8" lib) (list uint8)))
(test (f-s32-u8 10) -1999999990)
(define f-u32-u8
(pointer->procedure uint32 (dynamic-func "test_ffi_u32_u8" lib) (list uint8)))
(test (f-u32-u8 10) 4000000010)
(define f-s64-u8
(pointer->procedure int64 (dynamic-func "test_ffi_s64_u8" lib) (list uint8)))
(test (f-s64-u8 10) -1999999990)
(define f-u64-u8
(pointer->procedure uint64 (dynamic-func "test_ffi_u64_u8" lib) (list uint8)))
(test (f-u64-u8 10) 4000000010)
;;;
;;; One s64 arg
;;;
(define f-v-s64
(pointer->procedure void (dynamic-func "test_ffi_v_s64" lib) (list int64)))
(test (f-v-s64 10) *unspecified*)
(define f-s8-s64
(pointer->procedure int8 (dynamic-func "test_ffi_s8_s64" lib) (list int64)))
(test (f-s8-s64 10) -90)
(define f-u8-s64
(pointer->procedure uint8 (dynamic-func "test_ffi_u8_s64" lib) (list int64)))
(test (f-u8-s64 10) 210)
(define f-s16-s64
(pointer->procedure int16 (dynamic-func "test_ffi_s16_s64" lib) (list int64)))
(test (f-s16-s64 10) -19990)
(define f-u16-s64
(pointer->procedure uint16 (dynamic-func "test_ffi_u16_s64" lib) (list int64)))
(test (f-u16-s64 10) 40010)
(define f-s32-s64
(pointer->procedure int32 (dynamic-func "test_ffi_s32_s64" lib) (list int64)))
(test (f-s32-s64 10) -1999999990)
(define f-u32-s64
(pointer->procedure uint32 (dynamic-func "test_ffi_u32_s64" lib) (list int64)))
(test (f-u32-s64 10) 4000000010)
(define f-s64-s64
(pointer->procedure int64 (dynamic-func "test_ffi_s64_s64" lib) (list int64)))
(test (f-s64-s64 10) -1999999990)
(define f-u64-s64
(pointer->procedure uint64 (dynamic-func "test_ffi_u64_s64" lib) (list int64)))
(test (f-u64-s64 10) 4000000010)
;;
;; Multiple int args of differing types
;;
(define f-sum
(pointer->procedure int64 (dynamic-func "test_ffi_sum" lib)
(list int8 int16 int32 int64)))
(test (f-sum -1 2000 -30000 40000000000)
(+ -1 2000 -30000 40000000000))
;;
;; More than ten arguments
;;
(define f-sum-many
(pointer->procedure int64 (dynamic-func "test_ffi_sum_many" lib)
(list uint8 uint16 uint32 uint64
int8 int16 int32 int64
int8 int16 int32 int64)))
(test (f-sum-many 255 65535 4294967295 1844674407370955161
-1 2000 -30000 40000000000
5 -6000 70000 -80000000000)
(+ 255 65535 4294967295 1844674407370955161
-1 2000 -30000 40000000000
5 -6000 70000 -80000000000))
;;
;; Structs
;;
(define f-sum-struct
(pointer->procedure int64 (dynamic-func "test_ffi_sum_struct" lib)
(list (list int8 int16 int32 int64))))
(test (f-sum-struct (make-c-struct (list int8 int16 int32 int64)
(list -1 2000 -30000 40000000000)))
(+ -1 2000 -30000 40000000000))
;;
;; Structs
;;
(define f-memcpy
(pointer->procedure '* (dynamic-func "test_ffi_memcpy" lib)
(list '* '* int32)))
(let* ((src* '(0 1 2 3 4 5 6 7))
(src (bytevector->pointer (u8-list->bytevector src*)))
(dest (bytevector->pointer (make-bytevector 16 0)))
(res (f-memcpy dest src (length src*))))
(or (= (pointer-address dest) (pointer-address res))
(error "memcpy res not equal to dest"))
(or (equal? (bytevector->u8-list (pointer->bytevector dest 16))
'(0 1 2 3 4 5 6 7 0 0 0 0 0 0 0 0))
(error "unexpected dest")))
;;
;; Function pointers
;;
(define f-callback-1
(pointer->procedure int (dynamic-func "test_ffi_callback_1" lib)
(list '* int)))
(if (defined? 'procedure->pointer)
(let* ((calls 0)
(ptr (procedure->pointer int
(lambda (x)
(set! calls (+ 1 calls))
(* x 3))
(list int)))
(input (iota 123)))
(define (expected-result x)
(+ 7 (* x 3)))
(let ((result (map (cut f-callback-1 ptr <>) input)))
(and (or (= calls (length input))
(error "incorrect number of callback calls" calls))
(or (equal? (map expected-result input) result)
(error "incorrect result" result))))))
(define f-callback-2
(pointer->procedure double (dynamic-func "test_ffi_callback_2" lib)
(list '* float int double)))
(if (defined? 'procedure->pointer)
(let* ((proc (lambda (x y z)
(* (+ x (exact->inexact y)) z)))
(ptr (procedure->pointer double proc
(list float int double)))
(arg1 (map (cut * <> 1.25) (iota 123 500)))
(arg2 (iota 123))
(arg3 (map (cut / <> 2.0) (iota 123 0 -10))))
(define result
(map (cut f-callback-2 ptr <> <> <>)
arg1 arg2 arg3))
(or (equal? result (map proc arg1 arg2 arg3))
(error "incorrect result" result))))
;;;
;;; Global symbols.
;;;
(use-modules ((rnrs bytevectors) #:select (utf8->string)))
(if (defined? 'setlocale)
(setlocale LC_ALL "C"))
(define global (cond
((string-contains %host-type "cygwin")
;; On Cygwin, dynamic-link doesn't search recursively
;; into linked DLLs. Thus one needs to link to the core
;; C library DLL explicitly.
(dynamic-link "cygwin1"))
((string-contains %host-type "mingw")
;; Also, no recursive search into linked DLLs in MinGW.
(dynamic-link "msvcrt"))
(else
(dynamic-link))))
(define strerror
(pointer->procedure '* (dynamic-func "strerror" global)
(list int)))
(define strlen
(pointer->procedure size_t (dynamic-func "strlen" global)
(list '*)))
(let* ((ptr (strerror ENOENT))
(len (strlen ptr))
(bv (pointer->bytevector ptr len 0 'u8))
(str (utf8->string bv)))
(test #t (not (not (string-contains str "file")))))
(exit (not failed?))
;; Local Variables:
;; mode: scheme
;; End:
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