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;; -*- coding: utf-8; mode: scheme -*-
;;
;; objc-ffi.scm
;;
;; Copyright (c) 2006 KOGURO, Naoki (naoki@koguro.net)
;; All rights reserved.
;;
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following conditions
;; are met:
;;
;; 1. Redistributions of source code must retain the above copyright
;; notice, this list of conditions and the following disclaimer.
;; 2. Redistributions in binary form must reproduce the above copyright
;; notice, this list of conditions and the following disclaimer in the
;; documentation and/or other materials provided with the distribution.
;; 3. Neither the name of the authors nor the names of its contributors
;; may be used to endorse or promote products derived from this
;; software without specific prior written permission.
;;
;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
;; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
;; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
;; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
;; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
;; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
;; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
;; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
;; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;
;; $Id: $
;;
(define-module c-wrapper.objc-ffi
(use c-wrapper)
(use file.util)
(use srfi-1)
(extend c-wrapper.c-ffi)
(c-load '("stdlib.h" "objc/objc-runtime.h" "objc/objc-class.h")
:libs "-lobjc"
:compiled-lib "objc-ffilib")
(export @
@selector
c-load-framework
objc-lookup-class
objc-register-method
objc-add-method
make-super
<id>
<SEL>)
)
(select-module c-wrapper.objc-ffi)
(with-module c-wrapper.c-ffi
(set! %c-load-framework
(lambda (name)
(or (and-let* ((filename (find-file-in-paths
name :paths (map (cut string-append
<>
name
".framework/")
(list (build-path
(sys-getenv "HOME")
"Library/Frameworks/")
"/Library/Frameworks/"
"/System/Library/Frameworks/"))
:pred file-is-readable?)))
(c-load-library filename))
(errorf "framework ~a is not found" name)))))
(define c-load-framework (with-module c-wrapper.objc-ffi %c-load-framework))
(define method-pool (make-hash-table 'string=?))
(define ivar-pool (make-hash-table 'equal?))
(define (@ str)
(objc-string <id> str) )
(define (@selector name)
(sel_registerName (x->string name)))
(define (encode-objc-type c-type)
(format "~a~a"
(cond
((equal? c-type <c-char>)
"c")
((equal? c-type <c-int>)
"i")
((equal? c-type <c-short>)
"s")
((equal? c-type <c-long>)
"l")
((equal? c-type <c-longlong>)
"q")
((equal? c-type <c-uchar>)
"C")
((equal? c-type <c-uint>)
"I")
((equal? c-type <c-ushort>)
"S")
((equal? c-type <c-ulong>)
"L")
((equal? c-type <c-ulonglong>)
"Q")
((equal? c-type <c-float>)
"f")
((equal? c-type <c-double>)
"d")
((equal? c-type <c-void>)
"v")
((equal? c-type <id>)
"@")
((equal? c-type <Class>)
"#")
((equal? c-type <SEL>)
":")
((is-a? c-type <c-array-meta>)
(format "[~a]" (encode-objc-type (element-type-of c-type))))
((is-a? c-type <c-struct-meta>)
(format "{~a}"
(string-append (map (lambda (alist)
(format "~a=~a"
(car alist)
(encode-objc-type (cdr alist))))
(decl-alist-of c-type)))))
((is-a? c-type <c-union-meta>)
(format "(~a)"
(string-append (map (lambda (alist)
(format "~a"
(encode-objc-type (cdr alist))))
(decl-alist-of c-type)))))
((bit-field? c-type)
"b")
((is-a? c-type <c-ptr-meta>)
(format "^~a" (encode-objc-type (orig-c-type-of c-type))))
(else
"?"))
(cond
((bit-field? c-type)
(bits-of c-type))
(else
(c-sizeof c-type)))))
(define (objc-lookup-class name)
(objc_lookUpClass (symbol->string name)))
(define (objc-register-method name type-list)
(hash-table-put! method-pool name type-list))
(define (nil? x)
(eq? (ref x) nil))
(define (objc-make-class name super-class-ptr)
(unless (nil? (objc-lookup-class name))
(errorf "Objective-C class '~a' is already exists." name))
(let ((root-class-ptr (do ((class-ptr super-class-ptr
(ref (deref class-ptr) 'super_class)))
((nil? (ref (deref class-ptr) 'super_class))
class-ptr)))
(new-class (deref (cast <Class>
(malloc (c-sizeof (c-struct 'objc_class))))))
(meta-class (deref (cast <Class>
(malloc (c-sizeof (c-struct 'objc_class)))))))
(set! (ref new-class 'isa) (ptr meta-class))
(set! (ref new-class 'info) CLS_CLASS)
(set! (ref meta-class 'info) CLS_META)
(set! (ref new-class 'name) (symbol->string name))
(set! (ref meta-class 'name) (symbol->string name))
(set! (ref new-class 'methodLists) (make-null-ptr))
(set! (ref meta-class 'methodLists) (make-null-ptr))
(set! (ref new-class 'super_class) super-class-ptr)
(set! (ref meta-class 'super_class) (ref (deref super-class-ptr) 'isa))
(set! (ref meta-class 'isa) (ref (deref root-class-ptr) 'isa))
(set! (ref new-class 'instance_size) (ref (deref super-class-ptr)
'instance_size))
(set! (ref meta-class 'instance_size)
(ref (deref (ref meta-class 'super_class)) 'instance_size))
(objc_addClass (ptr new-class))
new-class))
(define (objc-add-method class method-name ret-type arg-types proc)
(let ((selector (@selector method-name))
(method (make (c-struct 'objc_method)))
(method-list (make (c-struct 'objc_method_list))))
(set! (ref method 'method_name) selector)
(set! (ref method 'method_types)
(apply string-append (map encode-objc-type
(list* ret-type <id> <SEL> arg-types))))
(set! (ref method 'method_imp)
(cast (c-func-ptr ret-type (list* <id> <SEL> arg-types)) proc))
(set! (ref method-list 'method_count) 1)
(set! (ref (ref method-list 'method_list) 0) method)
(class_addMethods class (ptr method-list))))
(define (needs-objc_msgSend_stret? ret-type)
(define (composite-type? ret-type)
(or (is-a? ret-type <c-struct-meta>)
(is-a? ret-type <c-union-meta>)))
(if (big-endian?)
;; Mac on PPC
(composite-type? ret-type)
;; Mac on Intel
(cond
((not (composite-type? ret-type))
#f)
((< 8 (c-sizeof ret-type))
#t)
(else
(let loop ((composite-type ret-type))
(find (lambda (type)
(cond
((composite-type? type)
(loop type))
((and (is-a? type <c-array-meta>)
(< 1 (size-of type)))
#t)
(else
#f)))
(map cdr (decl-alist-of composite-type))))))))
(define (%objc-msg-send obj super? selector-name . args)
(or (and-let* ((lst (hash-table-get method-pool selector-name)))
(let* ((ret-type (car lst))
(arg-types (cdr lst))
(send (if (needs-objc_msgSend_stret? ret-type)
(lambda (obj selector . args)
(let ((retval (make ret-type)))
(apply (make-c-func-vaargs
(if super?
'objc_msgSendSuper_stret
'objc_msgSend_stret)
<c-void>
(append (list (ptr <c-void>)
(if super?
(ptr (c-struct 'objc_super))
<id>)
<SEL>)
arg-types))
(ptr retval) obj selector args)
retval))
(make-c-func-vaargs (if super?
'objc_msgSendSuper
'objc_msgSend)
ret-type
(append (list (if super?
(ptr (c-struct 'objc_super))
<id>)
<SEL>)
arg-types))))
(sel (@selector selector-name)))
(if (null-ptr? sel)
(errorf "selector ~a is not found." selector-name)
(apply send obj sel args))))
(errorf "selector ~a is not found." selector-name)))
(define (args->selector-name args)
(string-append
(string-join (map x->string
(filter (lambda (elem)
(or (symbol? elem) (keyword? elem)))
args))
":")
(if (= (length args) 1)
""
":")))
(define (filter-args args)
(remove (lambda (elem) (or (symbol? elem) (keyword? elem))) args))
(define-method object-apply ((obj <id>) . rest)
(apply %objc-msg-send obj #f (args->selector-name rest) (filter-args rest)))
(define-method object-apply ((obj (ptr (c-struct 'objc_super))) . rest)
(apply %objc-msg-send obj #t (args->selector-name rest) (filter-args rest)))
(define (make-super class obj)
(let ((data (make (c-struct 'objc_super))))
(set! (ref data 'receiver) obj)
(set! (ref data 'class)
(ref (deref (cast (ptr (c-struct 'objc_class)) class)) 'super_class))
(ptr data)))
(provide "c-wrapper/objc-ffi")
;; end of file
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