X-Git-Url: http://git.megacz.com/?p=org.ibex.core.git;a=blobdiff_plain;f=src%2Forg%2Fibex%2Fjs%2FJS.java;h=65ba3f63c420e5ba0bd6055d4effe080c7478fb2;hp=f9bd66b57a77e9cbcc4394a60c9fe3989a431789;hb=85c8f402be33df8440511492fb597fba9c2eb45f;hpb=ce791e4058158295bce9cf7b6698c2b565d571d7

diff --git a/src/org/ibex/js/JS.java b/src/org/ibex/js/JS.java
index f9bd66b..65ba3f6 100644
--- a/src/org/ibex/js/JS.java
+++ b/src/org/ibex/js/JS.java
@@ -14,18 +14,20 @@ public abstract class JS {
     public final JS unclone() { return _unclone(); }
     public final JS jsclone() throws JSExn { return new Clone(this); }
 
-    // FEATURE: JSEnumeration
-    public Enumeration keys() throws JSExn { throw new JSExn("you can't enumerate the keys of this object (class=" + getClass().getName() +")"); }
+    public JS.Enumeration keys() throws JSExn { throw new JSExn("you can't enumerate the keys of this object (class=" + getClass().getName() +")"); }
     public JS get(JS key) throws JSExn { return null; }
     public void put(JS key, JS val) throws JSExn { throw new JSExn("" + key + " is read only (class=" + getClass().getName() +")"); }
+    
+    public InputStream getInputStream() throws IOException {
+        throw new IOException("this object doesn't have a stream associated with it " + getClass().getName() + ")");
+    }
         
     public final boolean hasTrap(JS key) { return getTrap(key) != null; }
     
     public JS callMethod(JS method, JS a0, JS a1, JS a2, JS[] rest, int nargs) throws JSExn {
         throw new JSExn("method not found (" + JS.debugToString(method) + ")");
-    }    
+    }
     
-    // FIXME: JSArgs objects, pointers into stack frame
     public JS call(JS a0, JS a1, JS a2, JS[] rest, int nargs) throws JSExn {
         throw new JSExn("you cannot call this object (class=" + this.getClass().getName() +")");
     }
@@ -39,12 +41,13 @@ public abstract class JS {
     Trap getTrap(JS key) { return null; }
     void putTrap(JS key, Trap value) throws JSExn { throw new JSExn("traps cannot be placed on this object (class=" + this.getClass().getName() +")"); }
     String coerceToString() throws JSExn { throw new JSExn("can't coerce to a string (class=" + getClass().getName() +")"); }
+    String debugToString() { return "[class=" + getClass().getName() + "]"; }
     boolean jsequals(JS o) { return this == o; }
     
-    public static class O extends JS {
+    public static class O extends JS implements Cloneable {
         private Hash entries;
         
-        public Enumeration keys() throws JSExn { return entries == null ? emptyEnumeration : entries.keys(); }
+        public Enumeration keys() throws JSExn { return entries == null ? (Enumeration)EMPTY_ENUMERATION : (Enumeration)new JavaEnumeration(null,entries.keys()); }
         public JS get(JS key) throws JSExn { return entries == null ? null : (JS)entries.get(key, null); }
         public void put(JS key, JS val) throws JSExn { (entries==null?entries=new Hash():entries).put(key,null,val); }        
 
@@ -71,29 +74,63 @@ public abstract class JS {
         public final void replaceNode(int index, Object o) { bt().replaceNode(index,o); }
         public final int indexNode(Object o) { return bt().indexNode(o); }
     }
-    
+        
     JS _unclone() { return this; }
     
     public interface Cloneable { }
     
-    public static class Clone extends JS.O implements Cloneable {
+    public static class Clone extends JS.O {
         protected final JS clonee;
         JS _unclone() { return clonee.unclone(); }
         public JS getClonee() { return clonee; }
         public Clone(JS clonee) throws JSExn {
-            if(!(clonee instanceof Cloneable)) throw new JSExn("" + getClass().getName() + " isn't cloneable");
+            if(!(clonee instanceof Cloneable)) throw new JSExn("" + clonee.getClass().getName() + " isn't cloneable");
             this.clonee = clonee;
         }
         public boolean jsequals(JS o) { return unclone().jsequals(o.unclone()); }
         public Enumeration keys() throws JSExn { return clonee.keys(); }
-        public JS get(JS key) throws JSExn { return clonee.get(key); }
-        public void put(JS key, JS val) throws JSExn { clonee.put(key, val); }
+        public JS get(JS key) throws JSExn { return clonee.getAndTriggerTraps(key); }
+        public void put(JS key, JS val) throws JSExn { clonee.putAndTriggerTraps(key, val); }
         public JS callMethod(JS method, JS a0, JS a1, JS a2, JS[] rest, int nargs) throws JSExn {
             return clonee.callMethod(method, a0, a1, a2, rest, nargs);
         }
         public JS call(JS a0, JS a1, JS a2, JS[] rest, int nargs) throws JSExn {
             return clonee.call(a0, a1, a2, rest, nargs);
         }
+        public InputStream getInputStream() throws IOException { return clonee.getInputStream(); }
+    }
+    
+    public static abstract class Enumeration extends JS {
+        final Enumeration parent;
+        boolean done;
+        public Enumeration(Enumeration parent) { this.parent = parent; }
+        protected abstract boolean _hasMoreElements();
+        protected abstract JS _nextElement() throws JSExn;
+        
+        public final boolean hasMoreElements() {
+            if(!done && !_hasMoreElements()) done = true;
+            return !done ? true : parent != null ? parent.hasMoreElements() : false;
+        }
+        public final JS nextElement() throws JSExn { return !done ? _nextElement() : parent != null ? parent.nextElement() : null; }
+        
+        public JS get(JS key) throws JSExn {
+            //#jswitch(key)
+            case "hasMoreElements": return B(hasMoreElements());
+            case "nextElement": return nextElement();
+            //#end
+            return super.get(key);
+        }
+    }
+    public static class EmptyEnumeration extends Enumeration {
+        public EmptyEnumeration(Enumeration parent) { super(parent); }
+        protected boolean _hasMoreElements() { return false; }
+        protected JS _nextElement() { return null; }
+    }
+    public static class JavaEnumeration extends Enumeration {
+        private final java.util.Enumeration e;
+        public JavaEnumeration(Enumeration parent, java.util.Enumeration e) { super(parent); this.e = e; }
+        protected boolean _hasMoreElements() { return e.hasMoreElements(); }
+        protected JS _nextElement() { return (JS) e.nextElement(); }
     }
     
     // Static Interpreter Control Methods ///////////////////////////////////////////////////////////////
@@ -111,21 +148,30 @@ public abstract class JS {
     public static UnpauseCallback pause() throws NotPauseableException {
         Interpreter i = Interpreter.current();
         if (i.pausecount == -1) throw new NotPauseableException();
+        boolean get;
+        switch(i.f.op[i.pc]) {
+            case Tokens.RETURN: case ByteCodes.PUT: get = false; break;
+            case ByteCodes.GET: case ByteCodes.CALL: get = true; break;
+            default: throw new Error("should never happen");
+        }
         i.pausecount++;
-        return new JS.UnpauseCallback(i);
+        return new JS.UnpauseCallback(i,get);
     }
 
     public static class UnpauseCallback implements Task {
-        Interpreter i;
-        UnpauseCallback(Interpreter i) { this.i = i; }
-        public void perform() throws JSExn { unpause((JS)null); }
-        public void unpause(JS o) throws JSExn {
-            i.stack.push(o);
-            i.resume();
+        private Interpreter i;
+        private boolean get;
+        UnpauseCallback(Interpreter i, boolean get) { this.i = i; this.get = get; }
+        public void perform() throws JSExn { unpause(); }
+        public JS unpause() throws JSExn { return unpause((JS)null); }
+        public JS unpause(JS o) throws JSExn {
+            if (o == JS.METHOD) throw new JSExn("can't return a method to a paused context");
+            if(get) i.stack.push(o);
+            return i.resume();
         }
-        public void unpause(JSExn e) {
-            // FIXME: Throw the JSExn into the js world
-            throw new Error("Exception " + e + " thrown from background task");
+        public JS unpause(JSExn e) throws JSExn {
+            i.catchException(e);
+            return i.resume();
         }
     }
 
@@ -157,7 +203,7 @@ public abstract class JS {
     
     public static String debugToString(JS o) {
         try { return toString(o); }
-        catch(JSExn e) { return "[class=" + o.getClass().getName() + "]"; }
+        catch(JSExn e) { return o.debugToString(); }
     }
     
     public static boolean isInt(JS o) {
@@ -194,7 +240,15 @@ public abstract class JS {
     public static final JS B(boolean b) { return b ? T : F; }
     public static final JS B(int i) { return i==0 ? F : T; }
     
-    public static final JS S(String s) { return new JSString(s); }
+    private static final int CACHE_SIZE = 65536 / 4; // must be a power of two
+    private static final JSString[] stringCache = new JSString[CACHE_SIZE];
+    public static final JS S(String s)  {
+        if(s == null) return null;
+        int slot = s.hashCode()&(CACHE_SIZE-1);
+        JSString ret = stringCache[slot];
+        if(ret == null || !ret.s.equals(s)) stringCache[slot] = ret = new JSString(s);
+        return ret;
+    }
 
     public static final JS N(double d) { return new JSNumber.D(d); }
     public static final JS N(long l) { return new JSNumber.L(l); }
@@ -205,28 +259,25 @@ public abstract class JS {
         return N(n.doubleValue());
     }
 
-    private static final JSNumber.I[] smallIntCache = new JSNumber.I[65535 / 4];
-    private static final JSNumber.I[] largeIntCache = new JSNumber.I[65535 / 4];
+    private static final JSNumber.I[] smallIntCache = new JSNumber.I[CACHE_SIZE];
+    private static final JSNumber.I[] largeIntCache = new JSNumber.I[CACHE_SIZE];
     public static final JS N(int i) {
         JSNumber.I ret = null;
         int idx = i + smallIntCache.length / 2;
-        if (idx < smallIntCache.length && idx > 0) {
+        if (idx < CACHE_SIZE && idx > 0) {
             ret = smallIntCache[idx];
             if (ret != null) return ret;
         }
-        else ret = largeIntCache[Math.abs(idx % largeIntCache.length)];
+        else ret = largeIntCache[Math.abs(idx % CACHE_SIZE)];
         if (ret == null || ret.i != i) {
             ret = new JSNumber.I(i);
             if (idx < smallIntCache.length && idx > 0) smallIntCache[idx] = ret;
-            else largeIntCache[Math.abs(idx % largeIntCache.length)] = ret;
+            else largeIntCache[Math.abs(idx % CACHE_SIZE)] = ret;
         }
         return ret;
     }
     
-    private static Enumeration emptyEnumeration = new Enumeration() {
-            public boolean hasMoreElements() { return false; }
-            public Object nextElement() { throw new NoSuchElementException(); }
-        };
+    private static Enumeration EMPTY_ENUMERATION = new EmptyEnumeration(null);
     
     public static JS fromReader(String sourceName, int firstLine, Reader sourceCode) throws IOException {
         return JSFunction._fromReader(sourceName, firstLine, sourceCode);
@@ -243,15 +294,21 @@ public abstract class JS {
     /** performs a put, triggering traps if present; traps are run in an unpauseable interpreter */
     public void putAndTriggerTraps(JS key, JS value) throws JSExn {
         Trap t = getTrap(key);
-        if (t != null) t.invoke(value);
-        else put(key, value);
+        if(t == null || (t = t.writeTrap()) == null) put(key,value);
+        else new Interpreter(t,value,false).resume();
     }
 
     /** performs a get, triggering traps if present; traps are run in an unpauseable interpreter */
     public JS getAndTriggerTraps(JS key) throws JSExn {
         Trap t = getTrap(key);
-        if (t != null) return t.invoke();
-        else return get(key);
+        if (t == null || (t = t.readTrap()) == null) return get(key);
+        else return new Interpreter(t,null,false).resume();
+    }
+    
+    public JS justTriggerTraps(JS key, JS value) throws JSExn {
+        Trap t = getTrap(key);
+        if(t == null || (t = t.writeTrap()) == null) return value;
+        else return new Interpreter(t,value,true).resume();
     }
 
     /** adds a trap, avoiding duplicates */
@@ -266,7 +323,7 @@ public abstract class JS {
     final void delTrap(JS key, JSFunction f) throws JSExn {
         Trap t = (Trap)getTrap(key);
         if (t == null) return;
-        if (t.f == f) { putTrap(t.name, t.next); return; }
+        if (t.f == f) { putTrap(t.target, t.next); return; }
         for(; t.next != null; t = t.next) if (t.next.f == f) { t.next = t.next.next; return; }
     }