/usr/share/gauche-0.9/site/lib/h2s/fixup.scm is in gauche-gtk 0.6~pre1+git20121223-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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;; to modify the gtk objects generated in the parser,
;;
(define-module h2s.fixup
(export fixup)
(use h2s.gtk-types-for-fixup)
(use h2s.utils)
(use h2s.track)
(use h2s.objects)
(use srfi-13)
(use srfi-2)
(use srfi-1)
(use text.tr)
(use gauche.parameter)
)
(select-module h2s.fixup)
(define debug #f)
;;================================================================
;; PASS 2 - FIXUPS
;;
;; Load "hints" files
(define (load-hints hint-files)
(parameterize ((input-file "hints.h")) ;;dummy
(for-each (lambda (file)
(when (file-exists? file)
(report #`" loading ,file")
(with-error-handler
(lambda (e)
(logformat "Error in ~a ~a:\n~a\n" file (input-file) (ref e 'message))
(sys-exit -1))
(lambda ()
(load file :environment (current-module)))))) ; eval as scheme! good.
hint-files)))
;; utilities that can be used inside hints file
(define-macro (define-cproc-fix name . body)
`(cproc-fix ',name (lambda (self) ,@body)))
(define (cproc-fix name body)
(let1 self
(or (find-function name)
(make <gtk-function>
:scm-name name
:c-name (string->symbol (string-tr (x->string name) "-" "_"))
:return-type (find-type 'void)
:arguments '()))
(body self)))
(define-macro (disable-cproc name)
`(cond ((find-function ',name)
=> (lambda (f) (set! (internal? f) #t)))))
(define-macro (fix-arguments! args)
`(set! (arguments-of self) ,args))
(define-macro (fix-body! body)
`(begin
(set! (return-type-of self) #f) ;!!!
(set! (body-of self) ,body)))
(define-macro (define-cclass-fix name . body)
`(cclass-fix ',name (lambda (self) ,@body)))
(define (cclass-fix name body)
(let1 self
(or (find-struct name)
(error "cclass-fix: no such struct" name))
(body self)))
(define-macro (disable-cclass name)
`(cond ((find-struct ',name)
=> (lambda (s) (set! (internal? s) #t)))))
(define-macro (fix-field! name . body)
`((lambda (field) . ,body)
(or (find (lambda (p) (eq? (scm-name-of p) ,name))
(fields-of self))
(error "no such field" ',name))))
(define-macro (add-field! c-name typesig . opts)
`(set! (fields-of self)
(append (fields-of self)
(make <gtk-var>
:c-name ,c-name
:type (find-type-or-create ',typesig)
,@opts))))
;; some field may be missing in certain gtk versions.
;; use this to ignore such fields. NB: there may be more than
;; one field registered, if such fields appears within union.
(define-macro (ignore-field! name)
`(for-each (lambda (f) (set! (accessible? f) #f))
(filter (lambda (p) (eq? (scm-name-of p) ,name))
(fields-of self))))
(define-macro (ignore-field-except! names)
`(for-each (lambda (f) (set! (accessible? f) #f))
(remove (lambda (p) (memq (scm-name-of p) ,names))
(fields-of self))))
;; mmc: So this macro is not hygienic, and it modifies the `self' variable!
(define-macro (add-mixin! . c-mixin-names)
;; what if cpl-of fails?
;;
`(begin
(if (null? (cpl-of self))
(logformat "add-mixin! would fail on ~a\n" self)
(set! (direct-supers-of self)
(list ,@c-mixin-names (car (cpl-of self)))))
(set! (cpl-of self)
(list* ,@c-mixin-names (cpl-of self)))))
;; adds opaque GObject.
;; Fixme: This macro is used in the .hint files! To mark
(define-macro (define-opaque c-name type) ; :indirect or :gobject
`(make-opaque ',c-name ,type))
(define (make-opaque c-name type)
(let* ((struct (make-struct #`"_,|c-name|" '())))
(case type
((:gobject)
(set! (allocation-type-of struct) 'gobject)
(set! (superclass-of struct) (find-type 'GObject)) ; fixme: GObject* ?
(set! (cpl-of struct) '("Scm_GObjectClass")))
((:indirect)
(set! (allocation-type-of struct) 'indirect)
(set! (superclass-of struct) #f)
(set! (cpl-of struct) '()))
((:refcounted)
(set! (allocation-type-of struct) 'refcounted)
(set! (superclass-of struct) #f)
(set! (cpl-of struct) '()))
(else (error "unknown opaque object type" type)))))
;; mmc: haha!!! so this makes the .hints file a program! Compare w/ .stub files, which have partially(?) the _same_ syntax/commands!
;; extra cproc and cclass defined in the fix file is copied to
;; the output stub file.
(define-macro (define-cclass . args)
`(make <extra-stub> :body '(define-cclass ,@args) :type? #f))
(define-macro (define-cproc . args)
`(make <extra-stub> :body '(define-cproc ,@args) :type? #f))
(define-macro (define-enum . args)
`(make <extra-stub> :body '(define-enum ,@args) :type? #f))
(define-macro (define-constant . args)
`(make <extra-stub> :body '(define-constant ,@args) :type? #f))
(define-macro (define-type . args)
`(make <extra-stub> :body '(define-type ,@args) :type? #t)) ; this is special! this goes to a different file! the central type repo.
(define-macro (raw-code . args)
`(make <extra-stub> :body (string-join ',args "\n" 'suffix) :type? #f)) ;mmc: bug: \n is not ok.
;; figure out what implemenation type each structure is,
;; by examining its first field.
;;
(define-method set-superclass ((self <gtk-struct>))
(if debug (logformat-color 118 "set-superclass: ~a\n" (c-name-of self)))
(if (slot-bound? self 'superclass)
(begin
(if debug (logformat "we already know: ~a\n" (ref self 'superclass)))
(superclass-of self))
;;
(receive (superclass gobject)
(if (null? (fields-of self))
(values #f #f)
(let ((first-slot-type (type-of (car (fields-of self)))))
;;<------ the specifics of the G-object inheritance system
(cond
((memq (c-name-of first-slot-type) '(GObject GInitiallyUnowned))
;;(eq? (c-name-of first-slot-type) 'GObject) ; `top'
(logformat-color 111 "\tfirst-slot-type: ~a\n" first-slot-type)
(values
;; mmc: fake: (was first-slot-type)
(find-type 'GObject)
#t))
;; mmc: why do we look for the pointer-type ?
;; why do we want the pointer type?? .... b/c we have only those!
((and-let*
((ptrname (string->symbol #`",(c-name-of first-slot-type)*"))
(ptrtype (find-type ptrname))
;;mmc: todo! todo! todo! todo! todo! todo! todo! todo! todo! todo! todo!
((logformat "trying ~a\n" ptrtype))
((is-a? (body-of ptrtype) <gtk-struct>))
((set-superclass (body-of ptrtype)))) ; recurse!!! the structure?
(if debug (logformat-color 51 "\t\tfound superclass: ~a: gobject? ~a\n"
(c-name-of ptrtype)
(gobject? (body-of ptrtype))))
(values ptrtype (gobject? (body-of ptrtype))))) ;and this is already determined ???
(else
(logformat-color 10 "\t\t sorry: cannot find superclass of ~a\n" self)
(values #f #f)))))
;; now we have (superclass gobject)
;;
(when gobject
(set! (allocation-type-of self) 'gobject)) ; do we do it in topological order ?? No: we recurse!!!
(set! (superclass-of self) superclass)
superclass)))
(define-method set-cpl ((self <gtk-struct>))
(if debug (logformat-color 118 "set-cpl: ~a\n" (c-name-of self)))
;; after setting up superclass field of all structs, sets up CPL.
;; the hints file may modify CPL afterwards.
(set! (cpl-of self)
(let loop ((super (superclass-of self))
(classes '()))
(logformat "set-cpl: ~a, cname: ~a\n" super (if super (c-name-of super) "#f"))
(cond ((not super)
(reverse classes))
((eq? (c-name-of super) 'GObject) ; ugly hack!
(reverse (cons "Scm_GObjectClass" classes))) ; ???
((eq? (c-name-of super) 'GdkEvent*)
(reverse (cons "Scm_GdkEventClass" classes)))
(else (loop (superclass-of (body-of super))
(cons #`"Scm_,(c-name-of (body-of super))Class"
classes)))))))
;; mmc: i would like an example of such data type/struct
;; i think the old gdk-pixbuf used such thing.
(define-method set-refcounted ((self <gtk-struct>))
(if debug (logformat-color 118 "set-refcounted: ~a\n" (c-name-of self)))
;; use heuristics to find out if self is a ref-counting object (and not an
;; GObject). mmc: where do we avoid the GObject?
(when (find (lambda (field) (equal? (c-name-of field) "ref_count"))
(fields-of self)) ; it doesn't walk the inheritance tree !
(set! (allocation-type-of self) 'refcounted)))
;; the last step of fixup. i.e before fixup-functions, and before reading .hints!
;;
(define-method set-fields ((self <gtk-struct>))
;; scan <gtk-var>'s in the fields and sets up it's default setter and getter
(define (set-field-getter-n-setter field)
(let ((stub-type (scm-type-of (type-of field))))
(cond
((eq? stub-type '<gchar*>)
(set! (ref field 'getter)
#`"return SCM_MAKE_STR_COPYING_SAFELY(obj->,(c-name-of field));")
(set! (ref field 'setter)
;; Check if it is a string!!!
#`"if (SCM_STRINGP(value)) {obj->,(c-name-of field) = Scm_GetString(SCM_STRING(value));};")
;Scm_GetStringConst(SCM_STRING(value)) fixme: this should use malloc, not GC_malloc_atomic!
) ;mmc! was #f mmc: what if it already has a value. Should i free it? fixme!
;; mmc: what is it? i would think it's symbol type ->
((not (pair? stub-type)) ; has proper stub type, so no need of g&s.
;; Basic types! <int> etc.
(if debug (logformat-color 213 "unknown type of the slot: ~a ~a\n" (c-name-of field) stub-type))
(set! (ref field 'getter) #t)
(set! (ref field 'setter) #t))
((and-let*
;; mmc: these don't even consider the scm-type!!
;; check if it is an embedded structure.
((ptrtype ;; we store as types pointers !!! This is scheme!
(find-type (string->symbol #`",(c-name-of (type-of field))*")))
(ptrbody (body-of ptrtype)) ; can be symbol, struct, enum ...
;; why is this a condition ? What else ... symbol: char, int what's wrong w/ it?
((is-a? ptrbody <gtk-struct>)))
(set! (ref field 'getter)
;; getting the slot value and _immediately_ boxing it as the
#`"return ,(c-boxer-of ptrbody)(&(obj->,(c-name-of field)));")
(set! (ref field 'setter)
#`"obj->,(c-name-of field) = *,(c-unboxer-of ptrbody)(value);")
(logformat-color 214 "slot ~a embedded: ~a\n" (c-name-of field) (c-name-of ptrtype))
))
( ;; check if it is an array reference.
(and-let* ((arr (body-of (type-of field)))
((is-a? arr <gtk-array>))
(elttype (element-type-of arr))
(unboxer (get-slot-boxer elttype)))
(set! (ref field 'getter)
#`"ScmObj vec = Scm_MakeVector(,(size-of arr), SCM_FALSE); int i;
for (i=0; i<,(size-of arr); i++) {
SCM_VECTOR_ELEMENTS(vec)[i] = ,(unboxer #`\"(obj->,(c-name-of field)[i])\");
}
return vec;")
;; (UNKNOWN . XXXX)
(set! (ref field 'setter) #f)))
(else
(set! (ref field 'accessible?) #f)))))
(if debug
(logformat-color 118 "set-fields: ~a\n" (c-name-of self)))
(for-each set-field-getter-n-setter (fields-of self)))
;; mmc: ???
(define-method set-qualifier ((self <gtk-struct>))
;; sets GtkObject subclasses :base class, so that Scheme subclass can !! mmc!!
;; be defined.
(when (eq? (allocation-type-of self) 'gobject)
(set! (qualifier-of self) :base))) ; mmc: what does this do? -> genstub!
;; i have to know this well:
(define (fixup-structs)
(logformat-color 118 "fixup-structs\n=========\n")
;; Special treatment : GdkBitmap*, GdkPixmap* and GdkWindow* are really
;; synonyms of GdkDrawable*.
;; mmc: this should be meat for me/aliases!!
;; no more needed!
'(let ((gdkdrawable (find-type 'GdkDrawable*)))
(for-each (lambda (n)
(set! (body-of (find-type n)) (body-of gdkdrawable)))
'(GdkBitmap* GdkPixmap* GdkWindow*)))
;; GtkAllocation is an alias of GdkRectangle.
(let ((gtk-allocation-type (find-type-or-create 'GtkAllocation*))
(gdk-rectangle-struct (find-struct '<gdk-rectangle>)))
(set! (body-of gtk-allocation-type) gdk-rectangle-struct))
;; mmc: this should be meat for me/aliases!! typedef GdkRectangle GtkAllocation;
(for-each-instance set-superclass <gtk-struct>)
(for-each-instance set-cpl <gtk-struct>)
(for-each-instance set-refcounted <gtk-struct>)
(for-each-instance set-fields <gtk-struct>))
(define (fixup-structs-after)
;; need to do this after loading hints, for the allocation type of
;; the struct may be modified in hints.
(logformat "fixup-structs-after\n")
(for-each-instance set-qualifier <gtk-struct>))
;; Some heuristics to remove irrelevant functions
(define-method set-internal ((self <gtk-function>))
(let1 cnam (x->string (c-name-of self))
(when (or (string-suffix? "_ref" cnam)
(string-suffix? "_unref" cnam)
(string-suffix? "_get_type" cnam))
(set! (internal? self) #t))))
(define-method fix-arg ((self <gtk-function>))
;; This is for (void) argument list
(when (equal? (arguments-of self) '(()))
(set! (arguments-of self) '())) ; mmc: '(()) -> '() why is it needed. in fact void?
;; Ignore 'const' qualifier (except const-char*)
(for-each (lambda (arg)
(let* ((type (type-of arg))
(typename (c-name-of type)))
(when (and (not (memq typename '(const-char* const-gchar*)))
(string-prefix? "const-" (x->string typename))) ;mmc:! typename includes all of that!!!
(set! (type-of arg)
(find-type-or-create (string->symbol
(string-drop (x->string typename) ; const- is 6 chars, hehe
6)))))))
(arguments-of self)))
(define (fixup-functions)
(for-each-instance set-internal <gtk-function>)
(for-each-instance fix-arg <gtk-function>))
(define (fixup hint-files)
(fixup-structs)
(fixup-functions)
(load-hints hint-files)
(fixup-structs-after))
(provide "h2s/fixup")
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