Added original SDK code for Alien Swarm.

public/tier1/UtlStringMap.h

@@ -0,0 +1,110 @@
+//===== Copyright <20> 1996-2005, Valve Corporation, All rights reserved. ======//
+//
+// Purpose: 
+//
+//===========================================================================//
+
+#ifndef UTLSTRINGMAP_H
+#define UTLSTRINGMAP_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "utlsymbol.h"
+
+template <class T>
+class CUtlStringMap
+{
+public:
+	CUtlStringMap( bool caseInsensitive = true ) : m_SymbolTable( 0, 32, caseInsensitive )
+	{
+	}
+
+	// Get data by the string itself:
+	T& operator[]( const char *pString )
+	{
+		CUtlSymbol symbol = m_SymbolTable.AddString( pString );
+		int index = ( int )( UtlSymId_t )symbol;
+		if( m_Vector.Count() <= index )
+		{
+			m_Vector.EnsureCount( index + 1 );
+		}
+		return m_Vector[index];
+	}
+
+	// Get data by the string's symbol table ID - only used to retrieve a pre-existing symbol, not create a new one!
+	T& operator[]( UtlSymId_t n )
+	{
+		Assert( n <= m_Vector.Count() );
+		return m_Vector[n];
+	}
+
+	const T& operator[]( UtlSymId_t n ) const
+	{
+		Assert( n <= m_Vector.Count() );
+		return m_Vector[n];
+	}
+
+	bool Defined( const char *pString ) const
+	{
+		return m_SymbolTable.Find( pString ) != UTL_INVAL_SYMBOL;
+	}
+
+	UtlSymId_t Find( const char *pString ) const
+	{
+		return m_SymbolTable.Find( pString );
+	}
+
+	UtlSymId_t AddString( const char *pString )
+	{
+		CUtlSymbol symbol = m_SymbolTable.AddString( pString );
+		int index = ( int )( UtlSymId_t )symbol;
+		if( m_Vector.Count() <= index )
+		{
+			m_Vector.EnsureCount( index + 1 );
+		}
+		return symbol;
+	}
+
+	static UtlSymId_t InvalidIndex()
+	{
+		return UTL_INVAL_SYMBOL;
+	}
+
+	int GetNumStrings( void ) const
+	{
+		return m_SymbolTable.GetNumStrings();
+	}
+
+	const char *String( int n )	const
+	{
+		return m_SymbolTable.String( n );
+	}
+
+	// Clear all of the data from the map
+	void Clear()
+	{
+		m_Vector.RemoveAll();
+		m_SymbolTable.RemoveAll();
+	}
+
+	void Purge()
+	{
+		m_Vector.Purge();
+		m_SymbolTable.RemoveAll();
+	}
+
+	void PurgeAndDeleteElements()
+	{
+		m_Vector.PurgeAndDeleteElements();
+		m_SymbolTable.RemoveAll();
+	}
+
+
+
+private:
+	CUtlVector<T> m_Vector;
+	CUtlSymbolTable m_SymbolTable;
+};
+
+#endif // UTLSTRINGMAP_H