Fleshing out object functions.

diff --git a/ez.el b/ez.el
index e899ab4..f1ef37e 100644 (file)
--- a/ez.el
+++ b/ez.el
@@ -105,16 +105,6 @@
 
 ;; Object tree
 
-(defun ez-make-obj (&optional name attribs props parent first-child next-sibling)
-    (list name attribs props parent first-child next-sibling))
-
-(defun ez-obj-name (obj) (elt obj 0))
-(defun ez-obj-attribs (obj) (elt obj 1))
-(defun ez-obj-props (obj) (elt obj 2))
-(defun ez-obj-parent (obj) (elt obj 3))
-(defun ez-obj-first-child (obj) (elt obj 4))
-(defun ez-obj-next-sibling (obj) (elt obj 5))
-
 (defvar ez-property-defaults nil)
 
 (defun ez-load-property-defaults ()
@@ -122,6 +112,31 @@
   (dotimes (i 31)
     (aset ez-property-defaults i (aref ez-memory (+ ez-objtab-addr (* 2 i))))))
 
+(defun ez-get-obj-addr (obj-id)
+  (+ ez-objtab-addr (* 2 31) (* 9 (- obj-id 1))))
+
+(defun ez-get-obj-parent (obj-id)
+  (let ((addr (ez-get-obj-addr obj-id)))
+    (ez-mem-ref-byte (+ addr 4))))
+
+(defun ez-get-obj-sibling (obj-id)
+  (let ((addr (ez-get-obj-addr obj-id)))
+    (ez-mem-ref-byte (+ addr 5))))
+
+(defun ez-get-obj-child (obj-id)
+  (let ((addr (ez-get-obj-addr obj-id)))
+    (ez-mem-ref-byte (+ addr 6))))
+
+(defun ez-get-obj-plist-addr (obj-id)
+  (let ((addr (ez-get-obj-addr obj-id)))
+    (ez-mem-ref-word (+ addr 7))))
+
+(defun ez-get-obj-name (obj-id)
+  (let ((plist-addr (ez-get-obj-plist-addr obj-id)))
+    (if (> (ez-mem-ref-byte plist-addr) 0)
+        (ez-get-zstring (+ 1 (ez-get-obj-plist-addr obj-id)))
+      nil)))
+
 (defun ez-get-obj (obj-id)
   (let ((addr (+ ez-objtab-addr
                  (* 2 31)
@@ -135,7 +150,7 @@
      (let ((plist-addr (ez-mem-ref-word (+ addr 7))))
        (if (> (ez-mem-ref-byte plist-addr) 0)
            (ez-get-zstring (+ 1 plist-addr))
-         "")))))
+         nil)))))
 
 
 ;; Z-strings
@@ -183,9 +198,9 @@
        ((memq char '(1 2 3)) ;Abbreviation
         (setq abbrev-char char))
        ((= char 4)
-        (setq cur (mod (+ cur 1) 2)))
+        (setq cur (mod (+ cur 1) 3)))
        ((= char 5)
-        (setq cur (mod (+ 2 (- cur 1)) 2)))
+        (setq cur (mod (+ 3 (- cur 1)) 3)))
        (t 
         (setq s (concat s (substring (elt ez-zstring-alphabets cur)
                                      char (+ char 1))))
@@ -331,7 +346,7 @@
               operand-types (cdr operands-and-types)))))
     (let ((table-row (assoc (list optype opcode) ez-op-table)))
       (unless table-row
-        (error "Unsupported op" optype opcode))
+        (error "Unsupported op" instr-pc optype opcode operands operand-types))
       (let ((mnemonic (elt table-row 1)))
         (message "PC:%x Optype:%s Opcode:%x Mnemonic:%s Operands:%s"
                  instr-pc optype opcode mnemonic operands))
@@ -527,8 +542,14 @@
 (setq ez-call-stack (list (ez-make-call-stack-frame ez-start-pc)))
 (ez-execute-instr)
 
+(while (ez-execute-instr))
+
 (binformat #x97)
 "10010111"
+(ez-get-obj 208)
+(binformat #x57)
+"01010111"
+
 
 
 ez-call-stack