1 files changed, 115 insertions, 0 deletions
diff --git a/public/string_t.h b/public/string_t.h
new file mode 100644
index 0000000..9fa1de6
--- /dev/null
+++ b/public/string_t.h
@@ -0,0 +1,115 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Defines the more complete set of operations on the string_t defined
+// 			These should be used instead of direct manipulation to allow more
+//			flexibility in future ports or optimization.
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef STRING_T_H
+#define STRING_T_H
+
+#if defined( _WIN32 )
+#pragma once
+#endif
+
+#ifndef NO_STRING_T
+
+#ifdef WEAK_STRING_T
+
+typedef int	string_t;
+
+//-----------------------------------------------------------------------------
+// Purpose: The correct way to specify the NULL string as a constant.
+//-----------------------------------------------------------------------------
+
+#define NULL_STRING			0
+
+//-----------------------------------------------------------------------------
+// Purpose: Given a string_t, make a C string. By convention the result string 
+// 			pointer should be considered transient and should not be stored.
+//-----------------------------------------------------------------------------
+
+#define STRING( offset )	( ( offset ) ? reinterpret_cast<const char *>( offset ) : "" )
+
+//-----------------------------------------------------------------------------
+// Purpose: Given a C string, obtain a string_t
+//-----------------------------------------------------------------------------
+
+#define MAKE_STRING( str )	( ( *str != 0 ) ? reinterpret_cast<int>( str ) : 0 )
+
+//-----------------------------------------------------------------------------
+
+#define IDENT_STRINGS( s1, s2 )	*((void **)&(s1)) == *((void **)&(s2))
+
+//-----------------------------------------------------------------------------
+
+#else // Strong string_t
+
+//-----------------------------------------------------------------------------
+
+struct string_t
+{
+public:
+	bool operator!() const							{ return ( pszValue == NULL );			}
+	bool operator==( const string_t &rhs ) const	{ return ( pszValue == rhs.pszValue );	}
+	bool operator!=( const string_t &rhs ) const	{ return ( pszValue != rhs.pszValue );	}
+	bool operator<( const string_t &rhs ) const		{ return ((void *)pszValue < (void *)rhs.pszValue ); }
+
+	const char *ToCStr() const						{ return ( pszValue ) ? pszValue : ""; 	}
+	
+protected:
+	const char *pszValue;
+};
+
+//-----------------------------------------------------------------------------
+
+struct castable_string_t : public string_t // string_t is used in unions, hence, no constructor allowed
+{
+	castable_string_t()							{ pszValue = NULL; }
+	castable_string_t( const char *pszFrom )	{ pszValue = (pszFrom && *pszFrom) ? pszFrom : 0; }
+};
+
+//-----------------------------------------------------------------------------
+// Purpose: The correct way to specify the NULL string as a constant.
+//-----------------------------------------------------------------------------
+
+#define NULL_STRING			castable_string_t()
+
+//-----------------------------------------------------------------------------
+// Purpose: Given a string_t, make a C string. By convention the result string 
+// 			pointer should be considered transient and should not be stored.
+//-----------------------------------------------------------------------------
+
+#define STRING( string_t_obj )	(string_t_obj).ToCStr()
+
+//-----------------------------------------------------------------------------
+// Purpose: Given a C string, obtain a string_t
+//-----------------------------------------------------------------------------
+
+#define MAKE_STRING( c_str )	castable_string_t( c_str )
+
+//-----------------------------------------------------------------------------
+
+#define IDENT_STRINGS( s1, s2 )	*((void **)&(s1)) == *((void **)&(s2))
+
+//-----------------------------------------------------------------------------
+
+inline void NetworkVarConstruct( string_t &x ) { x = NULL_STRING; }
+
+#endif
+
+#else	// NO_STRING_T
+
+typedef const char *string_t;
+#define NULL_STRING				0
+#define STRING( c_str )			( c_str )
+#define MAKE_STRING( c_str )	( c_str )
+#define IDENT_STRINGS( s1, s2 )	*((void **)&(s1)) == *((void **)&(s2))
+
+#endif	// NO_STRING_T
+
+//=============================================================================
+
+#endif // STRING_T_H