Added functions gvalue-new and gvalue-free

diff --git a/glib/gparam.lisp b/glib/gparam.lisp
new file mode 100644 (file)
index 0000000..1e75982
--- /dev/null
+++ b/glib/gparam.lisp
@@ -0,0 +1,57 @@
+;; Common Lisp bindings for GTK+ v2.0
+;; Copyright (C) 2000 Espen S. Johnsen <esj@stud.cs.uit.no>
+;;
+;; 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 2 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+;; $Id: gparam.lisp,v 1.1 2001-01-28 14:18:44 espen Exp $
+
+(in-package "GLIB")
+
+(deftype gvalue () 'pointer)
+
+(defconstant +gvalue-size+ (+ (size-of 'type-number) (* 4 (size-of 'double-float))))
+(defconstant +gvalue-value-offset+ (size-of 'type-number))
+
+(define-foreign ("g_value_init" gvalue-init) () nil
+  (type type-number))
+
+(defun gvalue-new (type)
+  (let ((gvalue (allocate-memory +gvalue-size+)))
+    (setf (system:sap-ref-32 gvalue 0) type)
+;    (gvalue-init (type-number-of type))
+    gvalue))
+
+(defun gvalue-free (gvalue free-content)
+  (unless (null-pointer-p gvalue)
+    (when free-content
+      (funcall
+       (get-destroy-function (gvalue-type gvalue))
+       gvalue +gvalue-value-offset+))
+    (deallocate-memory gvalue)))
+
+(defun gvalue-type (gvalue)
+  (type-from-number (system:sap-ref-32 gvalue 0)))
+
+(defun gvalue-get (gvalue)
+  (funcall
+   (get-reader-function (gvalue-type gvalue))
+   gvalue +gvalue-value-offset+))
+
+(defun gvalue-set (gvalue value)
+  (funcall
+   (get-writer-function (gvalue-type gvalue))
+   value gvalue +gvalue-value-offset+)
+  value)
+