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diff --git a/engine/testscriptmgr.cpp b/engine/testscriptmgr.cpp
new file mode 100644
index 0000000..c94ed1b
--- /dev/null
+++ b/engine/testscriptmgr.cpp
@@ -0,0 +1,423 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//===========================================================================//
+
+
+#include "tier0/platform.h"
+#include "sys.h"
+#include "testscriptmgr.h"
+#include "tier0/dbg.h"
+#include "filesystem_engine.h"
+#include "tier1/strtools.h"
+#include "cmd.h"
+#include "convar.h"
+#include "vstdlib/random.h"
+#include <stdlib.h>
+#if defined( _X360 )
+#include "xbox/xbox_win32stubs.h"
+#endif
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+CTestScriptMgr g_TestScriptMgr;
+
+ConVar testscript_debug( "testscript_debug", "0", 0, "Debug test scripts." );
+
+#ifdef _DEBUG
+// --------------------------------------------------------------------------------------------------- //
+// Global console commands the test script manager implements.
+// --------------------------------------------------------------------------------------------------- //
+CON_COMMAND_EXTERN( Test_Wait, Test_Wait, "" )
+{
+	if ( args.ArgC() < 2 )
+	{
+		Error( "Test_Wait: requires seconds parameter." );
+		return;
+	}
+
+	float flSeconds = atof( args[ 1 ] );
+	GetTestScriptMgr()->SetWaitTime( flSeconds );
+}
+
+CON_COMMAND_EXTERN( Test_RunFrame, Test_RunFrame, "" )
+{
+	GetTestScriptMgr()->SetWaitCheckPoint( "frame_end" );
+}
+
+CON_COMMAND_EXTERN( Test_WaitForCheckPoint, Test_WaitForCheckPoint, "" )
+{
+	if ( args.ArgC() < 2 )
+	{
+		Error( "Test_WaitForCheckPoint <checkpoint name> [once]: requires checkpoint name." );
+		return;
+	}
+
+	bool bOnce = ( args.ArgC() >= 3 && Q_stricmp( args[2], "once" ) == 0 );
+	GetTestScriptMgr()->SetWaitCheckPoint( args[ 1 ], bOnce );
+}
+
+CON_COMMAND_EXTERN( Test_StartLoop, Test_StartLoop, "Test_StartLoop <loop name> - Denote the start of a loop. Really just defines a named point you can jump to." )
+{
+	if ( args.ArgC() < 2 )
+	{
+		Error( "Test_StartLoop: requires a loop name." );
+		return;
+	}
+
+	GetTestScriptMgr()->StartLoop( args[ 1 ] );
+}
+
+CON_COMMAND_EXTERN( Test_LoopCount, Test_LoopCount, "Test_LoopCount <loop name> <count> - loop back to the specified loop start point the specified # of times." )
+{
+	if ( args.ArgC() < 3 )
+	{
+		Error( "Test_LoopCount: requires a loop name and number of times to loop." );
+		return;
+	}
+
+	GetTestScriptMgr()->LoopCount( args[ 1 ], atoi( args[ 2 ] ) );
+}
+
+CON_COMMAND_EXTERN( Test_Loop, Test_Loop, "Test_Loop <loop name> - loop back to the specified loop start point unconditionally." )
+{
+	if ( args.ArgC() < 2 )
+	{
+		Error( "Test_Loop: requires a loop name." );
+		return;
+	}
+
+	GetTestScriptMgr()->LoopCount( args[ 1 ], -1 );
+}
+
+CON_COMMAND_EXTERN( Test_LoopForNumSeconds, Test_LoopForNumSeconds, "Test_LoopForNumSeconds <loop name> <time> - loop back to the specified start point for the specified # of seconds." )
+{
+	if ( args.ArgC() < 3 )
+	{
+		Error( "Test_LoopLoopForNumSeconds: requires a loop name and number of seconds to loop." );
+		return;
+	}
+
+	GetTestScriptMgr()->LoopForNumSeconds( args[ 1 ], atof( args[ 2 ] ) );
+}
+
+CON_COMMAND( Test_RandomChance, "Test_RandomChance <percent chance, 0-100> <token1> <token2...> - Roll the dice and maybe run the command following the percentage chance." )
+{
+	if ( args.ArgC() < 3 )
+	{
+		Error( "Test_RandomChance: requires percentage chance parameter (0-100) followed by command to execute." );
+	}
+
+	float flPercent = atof( args[ 1 ] );
+	if ( RandomFloat( 0, 100 ) < flPercent )
+	{
+		char newString[1024];
+		newString[0] = 0;
+
+		for ( int i=2; i < args.ArgC(); i++ )
+		{
+			Q_strncat( newString, args[ i ], sizeof( newString ), COPY_ALL_CHARACTERS );
+			Q_strncat( newString, " ", sizeof( newString ), COPY_ALL_CHARACTERS );
+		}
+
+		Cbuf_InsertText( newString );
+	}
+}
+
+
+CON_COMMAND( Test_SendKey, "" )
+{
+	if ( args.ArgC() < 2 )
+	{
+		Error( "Test_SendKey: requires key to send." );
+	}
+	Sys_TestSendKey( args[1] );
+}
+
+CON_COMMAND( Test_StartScript, "Start a test script running.." )
+{
+	if ( args.ArgC() < 2 )
+	{
+		Warning( "Test_StartScript: requires filename of script to start (file must be under testscripts directory).\n" );
+	}
+
+	if ( !GetTestScriptMgr()->StartTestScript( args[1] ) )
+		Warning( "Error starting testscript '%s'\n", args[1] );
+}
+#endif
+
+// --------------------------------------------------------------------------------------------------- //
+// CTestScriptMgr implementation.
+// --------------------------------------------------------------------------------------------------- //
+CTestScriptMgr::CTestScriptMgr()
+{
+	m_hFile = FILESYSTEM_INVALID_HANDLE;
+	m_NextCheckPoint[0] = 0;
+	m_WaitUntil = Sys_FloatTime();
+}
+
+
+CTestScriptMgr::~CTestScriptMgr()
+{
+	Term();
+}
+
+
+bool CTestScriptMgr::StartTestScript( const char *pFilename )
+{
+	Term();
+
+	char fullName[512];
+	Q_snprintf( fullName, sizeof( fullName ), "testscripts\\%s", pFilename );
+
+	m_hFile = g_pFileSystem->Open( fullName, "rt" );
+	if ( m_hFile == FILESYSTEM_INVALID_HANDLE )
+		return false;
+
+	RunCommands();	
+	return true;
+}
+
+
+void CTestScriptMgr::Term()
+{
+	if ( m_hFile != FILESYSTEM_INVALID_HANDLE )
+	{
+		g_pFileSystem->Close( m_hFile );
+		m_hFile = FILESYSTEM_INVALID_HANDLE;
+	}
+}
+
+
+bool CTestScriptMgr::IsInitted() const
+{
+	return m_hFile != FILESYSTEM_INVALID_HANDLE;
+}
+
+
+void CTestScriptMgr::CheckPoint( const char *pName )
+{
+	if ( !IsInitted() || IsTimerWaiting() )
+		return;
+
+	if ( testscript_debug.GetInt() )
+	{
+		if ( stricmp( pName, "frame_end" ) != 0 )
+		{
+			Msg( "TESTSCRIPT: CheckPoint -> '%s'.\n", pName );
+		}
+	}
+
+	m_CheckPointsHit.Insert( pName, 0 ); // Remember that we hit this checkpoint.
+
+	if ( m_NextCheckPoint[0] )
+	{
+		if ( Q_stricmp( m_NextCheckPoint, pName ) != 0 )
+		{
+			// This isn't the checkpoint you're looking for.
+			return;
+		}
+	}
+
+	// Either the timer expired, or we hit the checkpoint we were waiting for. Run some more commands.
+	m_NextCheckPoint[0] = 0;
+	RunCommands();
+}
+
+
+void CTestScriptMgr::RunCommands()
+{
+	Assert( IsInitted() );
+
+	while ( !IsTimerWaiting() && !IsCheckPointWaiting() )
+	{
+		// Parse out the next command.
+		char curCommand[512];
+		int iCurPos = 0;
+
+		bool bInSlash = false;
+		while ( 1 )
+		{
+			g_pFileSystem->Read( &curCommand[iCurPos], 1, m_hFile );
+			if ( curCommand[iCurPos] == '/' )
+			{
+				if ( bInSlash )
+				{
+					// Ok, the rest of this line is a comment.
+					char tempVal = !'\n';
+					while ( tempVal != '\n' && !g_pFileSystem->EndOfFile( m_hFile ) )
+					{
+						g_pFileSystem->Read( &tempVal, 1, m_hFile );
+					}
+
+					--iCurPos;
+					break;
+				}
+				else
+				{
+					bInSlash = true;
+				}
+			}
+			else
+			{
+				bInSlash = false;
+
+				if ( curCommand[iCurPos] == ';' || curCommand[iCurPos] == '\n' || g_pFileSystem->EndOfFile( m_hFile ) )
+				{
+					// End of this command.
+					break;
+				}
+			}
+
+			++iCurPos;
+		}
+
+		curCommand[iCurPos] = 0;
+		
+		// Did we hit the end of the file?
+		if ( curCommand[0] == 0 )
+		{
+			if ( g_pFileSystem->EndOfFile( m_hFile ) )
+			{
+				Term();
+				break;
+			}
+			else
+			{
+				continue;
+			}			
+		}
+
+		Cbuf_AddText( curCommand );
+		Cbuf_Execute();
+	}
+}
+
+
+bool CTestScriptMgr::IsTimerWaiting() const
+{
+	if ( Sys_FloatTime() < m_WaitUntil )
+	{
+		return true;
+	}
+	else
+	{
+		return false;
+	}
+}
+
+
+bool CTestScriptMgr::IsCheckPointWaiting() const
+{
+	return m_NextCheckPoint[0] != 0;
+}
+
+
+void CTestScriptMgr::SetWaitTime( float flSeconds )
+{
+	m_WaitUntil = Sys_FloatTime() + flSeconds;
+}
+
+
+CLoopInfo* CTestScriptMgr::FindLoop( const char *pLoopName )
+{
+	FOR_EACH_LL( m_Loops, i )
+	{
+		if ( Q_stricmp( pLoopName, m_Loops[i]->m_Name ) == 0 )
+			return m_Loops[i];
+	}
+	return NULL;
+}
+
+
+void CTestScriptMgr::StartLoop( const char *pLoopName )
+{
+	ErrorIfNotInitted();
+
+	if ( FindLoop( pLoopName ) )
+	{
+		Error( "CTestScriptMgr::StartLoop( %s ): loop already exists.", pLoopName );
+	}
+
+	CLoopInfo *pLoop = new CLoopInfo;
+	Q_strncpy( pLoop->m_Name, pLoopName, sizeof( pLoop->m_Name ) );
+	pLoop->m_nCount = 0;
+	pLoop->m_flStartTime = Sys_FloatTime();
+	pLoop->m_iNextCommandPos = g_pFileSystem->Tell( m_hFile );
+	pLoop->m_ListIndex = m_Loops.AddToTail( pLoop );
+}
+
+
+void CTestScriptMgr::LoopCount( const char *pLoopName, int nTimes )
+{
+	ErrorIfNotInitted();
+
+	CLoopInfo *pLoop = FindLoop( pLoopName );
+	if ( !pLoop )
+	{
+		Error( "CTestScriptMgr::LoopCount( %s ): no loop with this name exists.", pLoopName );
+	}
+
+	++pLoop->m_nCount;
+	if ( pLoop->m_nCount < nTimes || nTimes == -1 )
+	{
+		g_pFileSystem->Seek( m_hFile, pLoop->m_iNextCommandPos, FILESYSTEM_SEEK_HEAD );
+	}
+	else
+	{
+		m_Loops.Remove( pLoop->m_ListIndex );
+		delete pLoop;
+	}
+}
+
+
+void CTestScriptMgr::LoopForNumSeconds( const char *pLoopName, double nSeconds )
+{
+	ErrorIfNotInitted();
+
+	CLoopInfo *pLoop = FindLoop( pLoopName );
+	if ( !pLoop )
+	{
+		Error( "CTestScriptMgr::LoopForNumSeconds( %s ): no loop with this name exists.", pLoopName );
+	}
+
+	if ( Sys_FloatTime() - pLoop->m_flStartTime < nSeconds )
+	{
+		g_pFileSystem->Seek( m_hFile, pLoop->m_iNextCommandPos, FILESYSTEM_SEEK_HEAD );
+	}
+	else
+	{
+		m_Loops.Remove( pLoop->m_ListIndex );
+		delete pLoop;
+	}
+}
+
+
+void CTestScriptMgr::ErrorIfNotInitted()
+{
+	if ( !IsInitted() )
+	{
+		Error( "CTestScriptMgr: not initialized." );
+	}
+}
+
+
+void CTestScriptMgr::SetWaitCheckPoint( const char *pCheckPointName, bool bOnce )
+{
+	if ( testscript_debug.GetInt() )
+	{
+		if ( stricmp( pCheckPointName, "frame_end" ) != 0 )
+		{
+			Msg( "TESTSCRIPT: waiting for checkpoint '%s'%s\n", pCheckPointName, bOnce ? " (once)." : "." );
+		}
+	}
+	
+	// Don't wait on this checkpoint if we alereayd
+	if ( bOnce && m_CheckPointsHit.Find( pCheckPointName ) != m_CheckPointsHit.InvalidIndex() )
+		return;
+
+	Q_strncpy( m_NextCheckPoint, pCheckPointName, sizeof( m_NextCheckPoint ) );
+}