Added original SDK code for Alien Swarm.

public/vstdlib/vcover.h

@@ -0,0 +1,125 @@
+//========== Copyright <20> 2005, Valve Corporation, All rights reserved. ========
+//
+// Purpose: A simple tool for coverage tests
+//
+//=============================================================================
+
+#ifndef VCOVER_H
+#define VCOVER_H
+
+#include "tier1/utlrbtree.h"
+#include "vstdlib.h"
+
+#if defined( _WIN32 )
+#pragma once
+#endif
+
+class CVCoverage
+{
+public:
+	CVCoverage() :
+	  m_bActive( false ),
+	  m_depth( 0 ),
+	  m_token( 1 )
+	{
+	}
+
+	bool IsActive() const
+	{
+		return m_bActive;
+	}
+
+	void SetActive( bool bActive )
+	{
+		Assert( bActive != m_bActive );
+		m_bActive = bActive;
+		if ( bActive )
+			++m_token;
+	}
+
+	void Begin()
+	{
+		++m_depth;
+	}
+
+	void End()
+	{
+		--m_depth;
+	}
+
+	void Reset()
+	{
+		m_locations.RemoveAll();
+	}
+
+	bool ShouldCover( unsigned token ) const
+	{
+		return ( m_bActive && m_depth > 0 && token != m_token );
+	}
+
+	unsigned Cover( const char *pszFile, int line )
+	{
+		Location_t location = { pszFile, line };
+
+		m_locations.Insert( location );
+
+		return m_token;
+	}
+
+	void Report()
+	{
+		for ( int i = m_locations.FirstInorder(); i != m_locations.InvalidIndex(); i = m_locations.NextInorder( i ) )
+		{
+			Msg( "%s(%d) :\n", m_locations[i].pszFile, m_locations[i].line );
+		}
+	}
+
+private:
+	struct Location_t
+	{
+		const char *pszFile;
+		int line;
+
+	};
+
+	class CLocationLess
+	{
+	public:
+		CLocationLess( int ignored ) {}
+		bool operator!() { return false; }
+
+		bool operator()(  const Location_t &lhs, const Location_t &rhs ) const
+		{
+			if ( lhs.line < rhs.line )
+			{
+				return true;
+			}
+
+			return CaselessStringLessThan( lhs.pszFile, rhs.pszFile );
+		}
+	};
+
+	bool m_bActive;
+	int m_depth;
+	unsigned m_token;
+
+	CUtlRBTree< Location_t, unsigned short, CLocationLess > m_locations;
+};
+
+VSTDLIB_INTERFACE CVCoverage g_VCoverage;
+
+#ifdef VCOVER_ENABLED
+#define VCOVER() \
+	do \
+	{ \
+		static token; \
+		if ( g_VCoverage.ShouldCover( token ) ) \
+		{ \
+			token = g_VCoverage.Cover(  __FILE__, __LINE__ ); \
+		} \
+	} while( 0 )
+#else
+#define VCOVER() ((void)0)
+#endif
+
+#endif // VCOVER_H