1 files changed, 118 insertions, 0 deletions
diff --git a/public/tier1/rangecheckedvar.h b/public/tier1/rangecheckedvar.h
new file mode 100644
index 0000000..52313f8
--- /dev/null
+++ b/public/tier1/rangecheckedvar.h
@@ -0,0 +1,118 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#ifndef RANGECHECKEDVAR_H
+#define RANGECHECKEDVAR_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+#include "tier0/dbg.h"
+#include "tier0/threadtools.h"
+#include "mathlib/vector.h"
+#include <float.h>
+
+
+// Use this to disable range checks within a scope.
+class CDisableRangeChecks
+{
+public:
+	CDisableRangeChecks();
+	~CDisableRangeChecks();
+};
+
+
+template< class T >
+inline void RangeCheck( const T &value, int minValue, int maxValue )
+{
+#ifdef _DEBUG
+	extern bool g_bDoRangeChecks;
+	if ( ThreadInMainThread() && g_bDoRangeChecks )
+	{
+		// Ignore the min/max stuff for now.. just make sure it's not a NAN.
+		Assert( _finite( value ) );
+	}
+#endif
+}
+
+inline void RangeCheck( const Vector &value, int minValue, int maxValue )
+{
+#ifdef _DEBUG
+	RangeCheck( value.x, minValue, maxValue );
+	RangeCheck( value.y, minValue, maxValue );
+	RangeCheck( value.z, minValue, maxValue );
+#endif
+}
+
+
+template< class T, int minValue, int maxValue, int startValue >
+class CRangeCheckedVar
+{
+public:
+
+	inline CRangeCheckedVar()
+	{
+		m_Val = startValue;
+	}
+
+	inline CRangeCheckedVar( const T &value )
+	{
+		*this = value;
+	}
+
+	T GetRaw() const
+	{
+		return m_Val;
+	}
+
+	// Clamp the value to its limits. Interpolation code uses this after interpolating.
+	inline void Clamp()
+	{
+		if ( m_Val < minValue )
+			m_Val = minValue;
+		else if ( m_Val > maxValue )
+			m_Val = maxValue;
+	}
+
+	inline operator const T&() const
+	{
+		return m_Val;
+	}
+
+	inline CRangeCheckedVar<T, minValue, maxValue, startValue>& operator=( const T &value )
+	{
+		RangeCheck( value, minValue, maxValue );
+		m_Val = value;
+		return *this;
+	}
+
+	inline CRangeCheckedVar<T, minValue, maxValue, startValue>& operator+=( const T &value )
+	{
+		return (*this = m_Val + value);
+	}
+
+	inline CRangeCheckedVar<T, minValue, maxValue, startValue>& operator-=( const T &value )
+	{
+		return (*this = m_Val - value);
+	}
+
+	inline CRangeCheckedVar<T, minValue, maxValue, startValue>& operator*=( const T &value )
+	{
+		return (*this = m_Val * value);
+	}
+
+	inline CRangeCheckedVar<T, minValue, maxValue, startValue>& operator/=( const T &value )
+	{
+		return (*this = m_Val / value);
+	}
+
+private:
+
+	T m_Val;
+};
+
+#endif // RANGECHECKEDVAR_H