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diff --git a/gpr/source/lib/dng_sdk/dng_assertions.h b/gpr/source/lib/dng_sdk/dng_assertions.h
new file mode 100644
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--- /dev/null
+++ b/gpr/source/lib/dng_sdk/dng_assertions.h
@@ -0,0 +1,133 @@
+/*****************************************************************************/
+// Copyright 2006-2007 Adobe Systems Incorporated
+// All Rights Reserved.
+//
+// NOTICE:  Adobe permits you to use, modify, and distribute this file in
+// accordance with the terms of the Adobe license agreement accompanying it.
+/*****************************************************************************/
+
+/* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_assertions.h#3 $ */ 
+/* $DateTime: 2012/09/05 12:31:51 $ */
+/* $Change: 847652 $ */
+/* $Author: tknoll $ */
+
+/** \file
+ * Conditionally compiled assertion check support.
+ */
+
+/*****************************************************************************/
+
+#ifndef __dng_assertions__
+#define __dng_assertions__
+
+/*****************************************************************************/
+
+#include "dng_exceptions.h"
+#include "dng_flags.h"
+
+/*****************************************************************************/
+
+#if qDNGDebug
+
+/// Platform-specific function to display an assert.
+
+void dng_show_message (const char *s);
+
+/// Show a formatted error message.
+
+void dng_show_message_f (const char *fmt, ...);
+
+#endif
+
+/*****************************************************************************/
+
+#ifndef DNG_ASSERT
+
+#if qDNGDebug
+
+/// Conditionally compiled macro to check an assertion and display a message if
+/// it fails and assertions are compiled in via qDNGDebug
+/// \param x Predicate which must be true.
+/// \param y String to display if x is not true.
+
+#define DNG_ASSERT(x,y) { if (!(x)) dng_show_message (y); }
+
+#else
+
+/// Conditionally compiled macro to check an assertion and display a message if
+/// it fails and assertions are compiled in via qDNGDebug
+/// \param x Predicate which must be true.
+/// \param y String to display if x is not true.
+
+#define DNG_ASSERT(x,y)
+
+#endif
+#endif
+
+/*****************************************************************************/
+
+#ifndef DNG_REQUIRE
+
+#if qDNGDebug
+
+/// Conditionally compiled macro to check an assertion, display a message, and throw
+/// an exception if it fails and assertions are compiled in via qDNGDebug
+/// \param condition Predicate which must be true.
+/// \param msg String to display if condition is not true.
+
+#define DNG_REQUIRE(condition,msg)				\
+	do											\
+		{										\
+												\
+		if (!(condition))						\
+			{									\
+												\
+			DNG_ASSERT(condition, msg);			\
+												\
+			ThrowProgramError (msg);			\
+												\
+			}									\
+												\
+		}										\
+	while (0)
+
+#else
+
+/// Conditionally compiled macro to check an assertion, display a message, and throw
+/// an exception if it fails and assertions are compiled in via qDNGDebug
+/// \param condition Predicate which must be true.
+/// \param msg String to display if condition is not true.
+
+#define DNG_REQUIRE(condition,msg)				\
+	do											\
+		{										\
+												\
+		if (!(condition))						\
+			{									\
+												\
+			ThrowProgramError (msg);			\
+												\
+			}									\
+												\
+		}										\
+	while (0)
+
+#endif
+#endif
+
+/*****************************************************************************/
+
+#ifndef DNG_REPORT
+
+/// Macro to display an informational message
+/// \param x String to display.
+
+#define DNG_REPORT(x) DNG_ASSERT (false, x)
+
+#endif
+
+/*****************************************************************************/
+
+#endif
+
+/*****************************************************************************/