From f6c26464c7ba34436a08d889f62137aeeef0e6e2 Mon Sep 17 00:00:00 2001
From: Kawe Mazidjatari <48657826+Mauler125@users.noreply.github.com>
Date: Sun, 27 Nov 2022 21:53:54 +0100
Subject: [PATCH] Add IKeyValuesSystem class from Valve Source SDK 2013

---
 r5dev/public/ikeyvaluessystem.h | 52 +++++++++++++++++++++++++++++++++
 r5dev/vstdlib/keyvaluessystem.h |  6 ++--
 2 files changed, 54 insertions(+), 4 deletions(-)
 create mode 100644 r5dev/public/ikeyvaluessystem.h

diff --git a/r5dev/public/ikeyvaluessystem.h b/r5dev/public/ikeyvaluessystem.h
new file mode 100644
index 00000000..47d18a03
--- /dev/null
+++ b/r5dev/public/ikeyvaluessystem.h
@@ -0,0 +1,52 @@
+//====== Copyright © 1996-2005, Valve Corporation, All rights reserved. =======//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+#ifndef VSTDLIB_IKEYVALUESSYSTEM_H
+#define VSTDLIB_IKEYVALUESSYSTEM_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+//#include "vstdlib/vstdlib.h"
+
+// handle to a KeyValues key name symbol
+typedef int HKeySymbol;
+#define INVALID_KEY_SYMBOL (-1)
+
+//-----------------------------------------------------------------------------
+// Purpose: Interface to shared data repository for KeyValues (included in vgui_controls.lib)
+//			allows for central data storage point of KeyValues symbol table
+//-----------------------------------------------------------------------------
+class IKeyValuesSystem
+{
+public:
+	// registers the size of the KeyValues in the specified instance
+	// so it can build a properly sized memory pool for the KeyValues objects
+	// the sizes will usually never differ but this is for versioning safety
+	virtual void RegisterSizeofKeyValues( int size ) = 0;
+
+	// allocates/frees a KeyValues object from the shared mempool
+	virtual void *AllocKeyValuesMemory( int size ) = 0;
+	virtual void FreeKeyValuesMemory( void *pMem ) = 0;
+
+	// symbol table access (used for key names)
+	virtual HKeySymbol GetSymbolForString( const char *name, bool bCreate = true ) = 0;
+	virtual const char *GetStringForSymbol( HKeySymbol symbol ) = 0;
+
+	// for debugging, adds KeyValues record into global list so we can track memory leaks
+	virtual void AddKeyValuesToMemoryLeakList( void *pMem, HKeySymbol name ) = 0;
+	virtual void RemoveKeyValuesFromMemoryLeakList( void *pMem ) = 0;
+
+	// set/get a value for keyvalues resolution symbol
+	// e.g.: SetKeyValuesExpressionSymbol( "LOWVIOLENCE", true ) - enables [$LOWVIOLENCE]
+	virtual void SetKeyValuesExpressionSymbol( const char *name, bool bValue ) = 0;
+	virtual bool GetKeyValuesExpressionSymbol( const char *name ) = 0;
+
+	// symbol table access from code with case-preserving requirements (used for key names)
+	virtual HKeySymbol GetSymbolForStringCaseSensitive( HKeySymbol &hCaseInsensitiveSymbol, const char *name, bool bCreate = true ) = 0;
+};
+
+#endif // VSTDLIB_IKEYVALUESSYSTEM_H
diff --git a/r5dev/vstdlib/keyvaluessystem.h b/r5dev/vstdlib/keyvaluessystem.h
index d24d58ff..f84af7a8 100644
--- a/r5dev/vstdlib/keyvaluessystem.h
+++ b/r5dev/vstdlib/keyvaluessystem.h
@@ -1,9 +1,8 @@
 #pragma once
 
-typedef int HKeySymbol;
-#define INVALID_KEY_SYMBOL (-1)
+#include "public/ikeyvaluessystem.h"
 
-class CKeyValuesSystem // VTABLE @ 0x1413AA1E8 in R5pc_r5launch_N1094_CL456479_2019_10_30_05_20_PM
+class CKeyValuesSystem : public IKeyValuesSystem// VTABLE @ 0x1413AA1E8 in R5pc_r5launch_N1094_CL456479_2019_10_30_05_20_PM
 {
 public:
 	void RegisterSizeofKeyValues(int64_t size);
@@ -19,7 +18,6 @@ public:
 
 	// Datatypes aren't accurate. But full fill the actual byte distance.
 public:
-	void* m_pVTable;                         // 0x0000
 	int64_t m_iMaxKeyValuesSize;             // 0x0008
 private:
 	char         gap10[240];                 // 0x0010