X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Forg%2Fibex%2Fjs%2FTrap.java;h=f2200fb32b6aabca99503b95e03cf832721481fb;hb=73131826a18c93af4fb04672bc3ec820e1197ad1;hp=77476f6f688b9d0711c54b550b5d508014e26084;hpb=b1fa73c17b31f268fca5695d0876d7314fbacce3;p=org.ibex.js.git

diff --git a/src/org/ibex/js/Trap.java b/src/org/ibex/js/Trap.java
index 77476f6..f2200fb 100644
--- a/src/org/ibex/js/Trap.java
+++ b/src/org/ibex/js/Trap.java
@@ -1,4 +1,7 @@
-// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
+// Copyright 2000-2005 the Contributors, as shown in the revision logs.
+// Licensed under the Apache Public Source License 2.0 ("the License").
+// You may not use this file except in compliance with the License.
+
 package org.ibex.js;
 
 /**
@@ -7,55 +10,22 @@ package org.ibex.js;
  *  linked list stack, with the most recently placed trap at the head
  *  of the list.
  */
-class Trap {
+final class Trap {
 
-    JS trapee = null;          ///< the box on which this trap was placed
-    Object name = null;        ///< the property that the trap was placed on
+    final JS target;          ///< the box on which this trap was placed
+    final JS key;             ///< the property that the trap was placed on
 
-    JSFunction f = null;       ///< the function for this trap
-    Trap next = null;          ///< the next trap down the trap stack
+    final JSFunction f;       ///< the function for this trap
+    Trap next;                ///< the next trap down the trap stack
 
-    Trap(JS b, String n, JSFunction f, Trap nx) {
-        trapee = b; name = n; this.f = f; this.next = nx;
-    }
-
-    static final JSFunction putInvoker = new JSFunction("putInvoker", 0, null);
-    static final JSFunction getInvoker = new JSFunction("getInvoker", 0, null);
-
-    static {
-        putInvoker.add(1, ByteCodes.PUT, null);
-        putInvoker.add(2, Tokens.RETURN, null);
-        getInvoker.add(1, ByteCodes.GET, null);
-        getInvoker.add(2, Tokens.RETURN, null);
+    Trap(JS b, JS n, JSFunction f, Trap nx) {
+        target = b; key = n; this.f = f; this.next = nx;
     }
     
-    void invoke(Object value) throws JSExn {
-        Interpreter i = new Interpreter(putInvoker, false, null);
-        i.stack.push(trapee);
-        i.stack.push(name);
-        i.stack.push(value);
-        i.resume();
-    }
-
-    Object invoke() throws JSExn {
-        Interpreter i = new Interpreter(getInvoker, false, null);
-        i.stack.push(trapee);
-        i.stack.push(name);
-        return i.resume();
-    }
-
-    // FIXME: review; is necessary?
-    static class TrapScope extends JSScope {
-        Trap t;
-        Object val = null;
-        boolean cascadeHappened = false;
-        public TrapScope(JSScope parent, Trap t, Object val) { super(parent); this.t = t; this.val = val; }
-        public Object get(Object key) throws JSExn {
-            if (key.equals("trapee")) return t.trapee;
-            if (key.equals("callee")) return t.f;
-            if (key.equals("trapname")) return t.name;
-            return super.get(key);
-        }
-    }
+    boolean isReadTrap()  { return f.numFormalArgs == 0; }
+    boolean isWriteTrap() { return f.numFormalArgs != 0; }
+    Trap readTrap()  { Trap t = this; while(t!=null && t.isWriteTrap()) t = t.next; return t; }
+    Trap writeTrap() { Trap t = this; while(t!=null && t.isReadTrap())  t = t.next; return t; }
+    Trap nextReadTrap()  { return next == null ? null : next.readTrap();  }
+    Trap nextWriteTrap() { return next == null ? null : next.writeTrap(); }
 }
-