diff --git a/indra/llcommon/llunits.h b/indra/llcommon/llunits.h
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index 0000000000000000000000000000000000000000..0fcb8281a02776b4c61c491a527ca0041c282e27
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+++ b/indra/llcommon/llunits.h
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+/** 
+ * @file llunits.h
+ * @brief Unit definitions
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLUNITTYPE_H
+#define LL_LLUNITTYPE_H
+
+#include "stdtypes.h"
+#include "llunittype.h"
+
+//
+// Unit declarations
+//
+
+namespace LLUnits
+{
+LL_DECLARE_BASE_UNIT(Bytes, "B");
+// technically, these are kibibytes, mibibytes, etc. but we should stick with commonly accepted terminology
+LL_DECLARE_DERIVED_UNIT(Kilobytes, "KB", Bytes, / 1024);
+LL_DECLARE_DERIVED_UNIT(Megabytes, "MB", Kilobytes, / 1024);
+LL_DECLARE_DERIVED_UNIT(Gigabytes, "GB", Megabytes, / 1024);
+}
+
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Bytes);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Kilobytes);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Megabytes);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Gigabytes);
+
+namespace LLUnits
+{
+// technically, these are kibibits, mibibits, etc. but we should stick with commonly accepted terminology
+LL_DECLARE_DERIVED_UNIT(Bits,		"b", 	Bytes, * 8	);
+LL_DECLARE_DERIVED_UNIT(Kilobits,	"Kb",	Bits, / 1024);
+LL_DECLARE_DERIVED_UNIT(Megabits,	"Mb",	Kilobits, / 1024);  
+LL_DECLARE_DERIVED_UNIT(Gigabits,	"Gb",	Megabits, / 1024);
+}
+
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Bits);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Kilobits);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Megabits);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Gigabits);
+
+namespace LLUnits
+{
+LL_DECLARE_BASE_UNIT(Seconds, "s");
+LL_DECLARE_DERIVED_UNIT(Minutes,		"min",			Seconds, / 60);
+LL_DECLARE_DERIVED_UNIT(Hours,			"h",			Minutes, / 60);
+LL_DECLARE_DERIVED_UNIT(Days,			"d",			Hours, / 24);
+LL_DECLARE_DERIVED_UNIT(Milliseconds,	"ms",			Seconds, * 1000);
+LL_DECLARE_DERIVED_UNIT(Microseconds,	"\x09\x3cs",	Milliseconds, * 1000);
+LL_DECLARE_DERIVED_UNIT(Nanoseconds,	"ns",			Microseconds, * 1000);
+}
+
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Seconds);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Minutes);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Hours);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Days);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Milliseconds);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Microseconds);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Nanoseconds);
+
+namespace LLUnits
+{
+LL_DECLARE_BASE_UNIT(Meters, "m");
+LL_DECLARE_DERIVED_UNIT(Kilometers,		"km",	Meters, / 1000);
+LL_DECLARE_DERIVED_UNIT(Centimeters,	"cm",	Meters, * 100);
+LL_DECLARE_DERIVED_UNIT(Millimeters,	"mm",	Meters, * 1000);
+}
+
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Meters);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Kilometers);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Centimeters);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Millimeters);
+
+namespace LLUnits
+{
+// rare units
+LL_DECLARE_BASE_UNIT(Hertz, "Hz");
+LL_DECLARE_DERIVED_UNIT(Kilohertz, "KHz", Hertz, / 1000);
+LL_DECLARE_DERIVED_UNIT(Megahertz, "MHz", Kilohertz, / 1000);
+LL_DECLARE_DERIVED_UNIT(Gigahertz, "GHz", Megahertz, / 1000);
+
+LL_DECLARE_BASE_UNIT(Radians, "rad");
+LL_DECLARE_DERIVED_UNIT(Degrees, "deg", Radians, * 57.29578f);
+
+LL_DECLARE_BASE_UNIT(Percent, "%");
+LL_DECLARE_DERIVED_UNIT(Ratio, "x", Percent, / 100);
+
+LL_DECLARE_BASE_UNIT(Triangles, "tris");
+LL_DECLARE_DERIVED_UNIT(Kilotriangles, "ktris", Triangles, / 1000);
+
+} // namespace LLUnits
+
+// rare units
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Hertz);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Kilohertz);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Megahertz);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Gigahertz);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Radians);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Degrees);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Percent);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Ratio);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Triangles);
+LL_DECLARE_UNIT_TYPEDEFS(LLUnits, Kilotriangles);
+
+
+#endif // LL_LLUNITTYPE_H