1 files changed, 150 insertions, 0 deletions
diff --git a/gpr/source/lib/dng_sdk/dng_rational.cpp b/gpr/source/lib/dng_sdk/dng_rational.cpp
new file mode 100644
index 0000000..c366b46
--- /dev/null
+++ b/gpr/source/lib/dng_sdk/dng_rational.cpp
@@ -0,0 +1,150 @@
+/*****************************************************************************/
+// Copyright 2006 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_rational.cpp#1 $ */ 
+/* $DateTime: 2012/05/30 13:28:51 $ */
+/* $Change: 832332 $ */
+/* $Author: tknoll $ */
+
+/*****************************************************************************/
+
+#include "dng_rational.h"
+
+#include "dng_utils.h"
+
+/*****************************************************************************/
+
+real64 dng_srational::As_real64 () const
+	{
+
+	if (d)
+		return (real64) n / (real64) d;
+
+	else
+		return 0.0;
+
+	}
+
+/*****************************************************************************/
+
+void dng_srational::Set_real64 (real64 x, int32 dd)
+	{
+	
+	if (x == 0.0)
+		{
+		
+		*this = dng_srational (0, 1);
+
+		}
+	
+	if (dd == 0)
+		{
+		
+		real64 y = Abs_real64 (x);
+	
+		if (y >= 32768.0)
+			{
+			dd = 1;
+			}
+			
+		else if (y >= 1.0)
+			{
+			dd = 32768;
+			}
+			
+		else
+			{
+			dd = 32768 * 32768;
+			}
+			
+		}
+		
+	*this = dng_srational (Round_int32 (x * dd), dd);
+
+	}
+
+/*****************************************************************************/
+
+void dng_srational::ReduceByFactor (int32 factor)
+	{
+	
+	while (n % factor == 0 &&
+		   d % factor == 0 &&
+		   d >= factor)
+		{
+		n /= factor;
+		d /= factor;
+		}
+	
+	}
+		
+/*****************************************************************************/
+
+real64 dng_urational::As_real64 () const
+	{
+
+	if (d)
+		return (real64) n / (real64) d;
+
+	else
+		return 0.0;
+
+	}
+
+/*****************************************************************************/
+
+void dng_urational::Set_real64 (real64 x, uint32 dd)
+	{
+	
+	if (x <= 0.0)
+		{
+		
+		*this = dng_urational (0, 1);
+
+		}
+	
+	if (dd == 0)
+		{
+	
+		if (x >= 32768.0)
+			{
+			dd = 1;
+			}
+			
+		else if (x >= 1.0)
+			{
+			dd = 32768;
+			}
+			
+		else
+			{
+			dd = 32768 * 32768;
+			}
+			
+		}
+		
+	*this = dng_urational (Round_uint32 (x * dd), dd);
+	
+	}
+		
+/*****************************************************************************/
+
+void dng_urational::ReduceByFactor (uint32 factor)
+	{
+	
+	while (n % factor == 0 &&
+		   d % factor == 0 &&
+		   d >= factor)
+		{
+		n /= factor;
+		d /= factor;
+		}
+	
+	}
+		
+/*****************************************************************************/