# HG changeset patch
# User Jaroslav Tulach <jaroslav.tulach@apidesign.org>
# Date 1353170595 -3600
# Node ID 9eb74b221cff9512c22d2d9d2fc91d441f8641f2
# Parent  f61602ea7759cdeac8b785fbb40c7cf967f15582
Pre-fill arrays with nulls

diff -r f61602ea7759 -r 9eb74b221cff vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java
--- a/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Sat Nov 17 16:15:10 2012 +0100
+++ b/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Sat Nov 17 17:43:15 2012 +0100
@@ -592,25 +592,25 @@
                 }
                 case opc_newarray: {
                     int type = byteCodes[i++];
-                    out.append("stack.push(new Array(stack.pop()));");
+                    out.append("stack.push(new Array(stack.pop()).fillNulls());");
                     break;
                 }
                 case opc_anewarray: {
                     i += 2; // skip type of array
-                    out.append("stack.push(new Array(stack.pop()));");
+                    out.append("stack.push(new Array(stack.pop()).fillNulls());");
                     break;
                 }
                 case opc_multianewarray: {
                     i += 2;
                     int dim = readByte(byteCodes, ++i);
-                    out.append("{ var a0 = new Array(stack.pop());");
+                    out.append("{ var a0 = new Array(stack.pop()).fillNulls();");
                     for (int d = 1; d < dim; d++) {
                         out.append("\n  var l" + d).append(" = stack.pop();");
                         out.append("\n  for (var i" + d).append (" = 0; i" + d).
                             append(" < a" + (d - 1)).
                             append(".length; i" + d).append("++) {");
                         out.append("\n    var a" + d).
-                            append (" = new Array(l" + d).append(");");
+                            append (" = new Array(l" + d).append(").fillNulls();");
                         out.append("\n    a" + (d - 1)).append("[i" + d).append("] = a" + d).
                             append(";");
                     }
diff -r f61602ea7759 -r 9eb74b221cff vm/src/main/java/org/apidesign/vm4brwsr/GenJS.java
--- a/vm/src/main/java/org/apidesign/vm4brwsr/GenJS.java	Sat Nov 17 16:15:10 2012 +0100
+++ b/vm/src/main/java/org/apidesign/vm4brwsr/GenJS.java	Sat Nov 17 17:43:15 2012 +0100
@@ -41,6 +41,14 @@
         compile(GenJS.class.getClassLoader(), out, names);
     }
     static void compile(ClassLoader l, Appendable out, StringArray names) throws IOException {
+        out.append("Array.prototype.fillNulls = function() {\n" +
+             "  for(var i = 0; i < this.length; i++) {\n" +
+             "    this[i] = null;\n" +
+             "  }\n" +
+             "  return this;\n" +
+             "};");
+        
+        
         StringArray processed = new StringArray();
         StringArray initCode = new StringArray();
         for (String baseClass : names.toArray()) {
diff -r f61602ea7759 -r 9eb74b221cff vm/src/test/java/org/apidesign/vm4brwsr/ArrayTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/ArrayTest.java	Sat Nov 17 16:15:10 2012 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/ArrayTest.java	Sat Nov 17 17:43:15 2012 +0100
@@ -64,9 +64,9 @@
         try {
             ret = code.invokeFunction(methodName, args);
         } catch (ScriptException ex) {
-            fail("Execution failed in\n" + codeSeq, ex);
+            fail("Execution failed in\n" + StaticMethodTest.dumpJS(codeSeq), ex);
         } catch (NoSuchMethodException ex) {
-            fail("Cannot find method in\n" + codeSeq, ex);
+            fail("Cannot find method in\n" + StaticMethodTest.dumpJS(codeSeq), ex);
         }
         if (ret == null && expRes == null) {
             return;
diff -r f61602ea7759 -r 9eb74b221cff vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java	Sat Nov 17 16:15:10 2012 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java	Sat Nov 17 17:43:15 2012 +0100
@@ -275,15 +275,17 @@
             return (Invocable)js;
         } catch (Exception ex) {
             if (sb.length() > 2000) {
-                File f = File.createTempFile("execution", ".js");
-                FileWriter w = new FileWriter(f);
-                w.append(sb);
-                w.close();
-                sb.setLength(0);
-                sb.append(f.getPath());
+                dumpJS(sb);
             }
             fail("Could not compile:\n" + sb, ex);
             return null;
         }
     }
+    static String dumpJS(CharSequence sb) throws IOException {
+        File f = File.createTempFile("execution", ".js");
+        FileWriter w = new FileWriter(f);
+        w.append(sb);
+        w.close();
+        return f.getPath();
+    }
 }