diff -r a350c2cc736a -r 75e385f68b7e jitcraft/FixedArray.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jitcraft/FixedArray.cpp	Sat Jun 30 19:38:53 2012 -0700
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2012 David Anderson
+ *
+ * This file is part of JITCraft.
+ *
+ * JITCraft is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version.
+ * 
+ * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * JITCraft. If not, see http://www.gnu.org/licenses/.
+ */
+#include <limits.h>
+#include "FixedArray.h"
+#include "Zone.h"
+
+using namespace jc;
+
+static const unsigned kMaxFixedArrayLength = ((INT_MAX - sizeof(FixedArray)) / sizeof(jc::Object *));
+
+void
+FixedArray::init(unsigned length)
+{
+    WRITE_FIELD(length, length);
+}
+
+FixedArray *
+FixedArray::New(Zone *zone, unsigned length, Heap::Tenure tenure)
+{
+    // :TODO: error...
+    if (length >= kMaxFixedArrayLength) {
+        assert(false);
+        return NULL;
+    }
+
+    Object *obj = zone->allocate(MapKind_FixedArray, SizeFor(length), tenure);
+    if (!obj)
+        return NULL;
+
+    FixedArray *array = FixedArray::cast(obj);
+    array->init(length);
+    return array;
+}
+
+void
+ByteArray::init(unsigned length)
+{
+    WRITE_FIELD(length, length);
+}
+
+ByteArray *
+ByteArray::New(Zone *zone, unsigned length, Heap::Tenure tenure)
+{
+    // :TODO: error...
+    if (length >= kMaxFixedArrayLength) {
+        assert(false);
+        return NULL;
+    }
+
+    Object *obj = zone->allocate(MapKind_ByteArray, SizeFor(length), tenure);
+    if (!obj)
+        return NULL;
+
+    ByteArray *array = ByteArray::cast(obj);
+    array->init(length);
+    return array;
+}
+