renamed Script to JSU

[org.ibex.js.git] / src / org / ibex / js / JSFunction.java

diff --git a/src/org/ibex/js/JSFunction.java b/src/org/ibex/js/JSFunction.java
index 9dfc5db..681e03e 100644 (file)
--- a/src/org/ibex/js/JSFunction.java
+++ b/src/org/ibex/js/JSFunction.java
@@ -1,12 +1,12 @@
-// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
-package org.ibex.js;
+// 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.
 
-import java.io.*;
-import org.ibex.util.*;
+package org.ibex.js;
 
 /** A JavaScript function, compiled into bytecode */
-class JSFunction extends JS implements ByteCodes, Tokens, Task {
-
+class JSFunction extends JS.Immutable implements ByteCodes, Tokens {
+    private static final JS[] emptyArgs = new JS[0];
 
     // Fields and Accessors ///////////////////////////////////////////////
 
@@ -21,31 +21,22 @@ class JSFunction extends JS implements ByteCodes, Tokens, Task {
     int size = 0;                  ///< the number of instruction/argument pairs
 
     JSScope parentScope;           ///< the default scope to use as a parent scope when executing this
-    Vec formalArgs = new Vec();
 
-    // Public //////////////////////////////////////////////////////////////////////////////
 
-    // FEATURE: make sure that this can only be called from the Scheduler...
-    /** if you enqueue a function, it gets invoked in its own pauseable context */
-    public void perform() throws JSExn {
-        Interpreter i = new Interpreter(this, true, new JSArray());
-        i.resume();
-    }
+    // Public //////////////////////////////////////////////////////////////////////////////
 
-    /** parse and compile a function */
-    public static JSFunction _fromReader(String sourceName, int firstLine, Reader sourceCode) throws IOException {
-        JSFunction ret = new JSFunction(sourceName, firstLine, null);
-        if (sourceCode == null) return ret;
-        Parser p = new Parser(sourceCode, sourceName, firstLine);
-        while(true) {
-            int s = ret.size;
-            p.parseStatement(ret, null);
-            if (s == ret.size) break;
-        }
-        ret.add(-1, LITERAL, null); 
-        ret.add(-1, RETURN);
+    // FIXME: what needs to be syncrhonized (if anything)?
+    private Interpreter runner = null;
+    public Object run(Object o) throws JSExn {
+        if (runner == null) runner = new Interpreter(this, true, emptyArgs);
+        Object ret = runner.run(o);
+        if (runner.f == null) runner = null;
         return ret;
     }
+    public void pause() throws NotPausableException {
+        if (runner == null) throw new NotPausableException();
+        runner.pause();
+    }
 
     public JSFunction _cloneWithNewParentScope(JSScope s) {
         JSFunction ret = new JSFunction(sourceName, firstLine, s);
@@ -55,23 +46,13 @@ class JSFunction extends JS implements ByteCodes, Tokens, Task {
         ret.arg = this.arg;
         ret.line = this.line;
         ret.size = this.size;
-        ret.formalArgs = this.formalArgs;
         ret.numFormalArgs = this.numFormalArgs;
         return ret;
     }
 
-    /** Note: code gets run in an <i>unpauseable</i> context. */
-    public Object call(Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
-        JSArray args = new JSArray();
-        if (nargs > 0) args.addElement(a0);
-        if (nargs > 1) args.addElement(a1);
-        if (nargs > 2) args.addElement(a2);
-        for(int i=3; i<nargs; i++) args.addElement(rest[i-3]);
-        Interpreter cx = new Interpreter(this, false, args);
-        return cx.resume();
-    }
+    public JS call(JS[] args) throws JSExn { return (JS)new Interpreter(this, false, args).run(null); }
 
-    public JSScope getParentScope() { return parentScope; }
+    JSScope getParentScope() { return parentScope; }
 
     // Adding and Altering Bytecodes ///////////////////////////////////////////////////
 
@@ -104,23 +85,30 @@ class JSFunction extends JS implements ByteCodes, Tokens, Task {
 
     // Debugging //////////////////////////////////////////////////////////////////////
 
-    public String toString() { return "JSFunction [" + sourceName + ":" + firstLine + "]"; }
+    String extendedToString() { return "[" + sourceName + ":" + firstLine + "]"; }
 
-    public String dump() {
+    String dump() { return dump(""); }
+    private  String dump(String prefix) {
         StringBuffer sb = new StringBuffer(1024);
         sb.append("\n" + sourceName + ": " + firstLine + "\n");
         for (int i=0; i < size; i++) {
-            sb.append(i).append(" (").append(line[i]).append(") :");
+            sb.append(prefix);
+            sb.append(i).append(" (").append(line[i]).append("): ");
             if (op[i] < 0) sb.append(bytecodeToString[-op[i]]);
             else sb.append(codeToString[op[i]]);
             sb.append(" ");
-            sb.append(arg[i] == null ? "(no arg)" : arg[i]);
+            sb.append(arg[i] == null ? "(no arg)" : arg[i] instanceof JS ? JSU.str((JS)arg[i]) : arg[i]);
             if((op[i] == JF || op[i] == JT || op[i] == JMP) && arg[i] != null && arg[i] instanceof Number) {
                 sb.append(" jump to ").append(i+((Number) arg[i]).intValue());
             } else  if(op[i] == TRY) {
                 int[] jmps = (int[]) arg[i];
                 sb.append(" catch: ").append(jmps[0] < 0 ? "No catch block" : ""+(i+jmps[0]));
                 sb.append(" finally: ").append(jmps[1] < 0 ? "No finally block" : ""+(i+jmps[1]));
+            } else if(op[i] == NEWFUNCTION) {
+                sb.append(((JSFunction) arg[i]).dump(prefix + "     "));
+            } else if(op[i] == NEWSCOPE) {
+                int n = ((JSNumber)arg[i]).toInt();
+                sb.append(" base: " + (n>>>16) + " size: " + (n&0xffff));
             }
             sb.append("\n");
         }