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diff --git a/o3d/compiler/puritan/rand.h b/o3d/compiler/puritan/rand.h
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+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+#ifndef PURITAN_RAND_H
+#define PURITAN_RAND_H
+
+// Use a strong RNG if available.
+// TODO: Investigate using openssl on all platforms.
+#ifdef _WIN32
+#include <windows.h>
+#include <wincrypt.h>
+#else
+typedef void* HCRYPTPROV;
+#endif
+
+
+namespace Salem 
+{
+namespace Puritan
+{
+
+class Rand 
+{
+public:
+    unsigned y;
+    unsigned rnd_uint(void) ;
+    Rand(unsigned seed);
+    double rnd_flt(void);
+    int range(int lo, int hi);
+    unsigned urange(unsigned lo, unsigned hi);
+    size_t srange(size_t lo, size_t hi);
+    const char *from_list (const char **);
+
+private:
+    bool InitializeProvider();
+
+    HCRYPTPROV crypt_provider_;
+    static const size_t kCacheSize = 0x1000;
+    unsigned int cached_numbers_[kCacheSize];
+    long available_;
+};
+}
+}
+#endif