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//========= Copyright <EFBFBD> 1996-2005, Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//=============================================================================//
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#ifndef VSTDLIB_IKEYVALUESSYSTEM_H
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#define VSTDLIB_IKEYVALUESSYSTEM_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "vstdlib/vstdlib.h"
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// handle to a KeyValues key name symbol
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typedef int HKeySymbol;
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#define INVALID_KEY_SYMBOL (-1)
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//-----------------------------------------------------------------------------
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// Purpose: Interface to shared data repository for KeyValues (included in vgui_controls.lib)
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// allows for central data storage point of KeyValues symbol table
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//-----------------------------------------------------------------------------
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class IKeyValuesSystem
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{
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public:
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// registers the size of the KeyValues in the specified instance
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// so it can build a properly sized memory pool for the KeyValues objects
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// the sizes will usually never differ but this is for versioning safety
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virtual void RegisterSizeofKeyValues(int size) = 0;
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// allocates/frees a KeyValues object from the shared mempool
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virtual void *AllocKeyValuesMemory(int size) = 0;
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virtual void FreeKeyValuesMemory(void *pMem) = 0;
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// symbol table access (used for key names)
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virtual HKeySymbol GetSymbolForString( const char *name, bool bCreate = true ) = 0;
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virtual const char *GetStringForSymbol(HKeySymbol symbol) = 0;
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// for debugging, adds KeyValues record into global list so we can track memory leaks
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virtual void AddKeyValuesToMemoryLeakList(void *pMem, HKeySymbol name) = 0;
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virtual void RemoveKeyValuesFromMemoryLeakList(void *pMem) = 0;
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// set/get a value for keyvalues resolution symbol
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// e.g.: SetKeyValuesExpressionSymbol( "LOWVIOLENCE", true ) - enables [$LOWVIOLENCE]
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virtual void SetKeyValuesExpressionSymbol( const char *name, bool bValue ) = 0;
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virtual bool GetKeyValuesExpressionSymbol( const char *name ) = 0;
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// symbol table access from code with case-preserving requirements (used for key names)
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virtual HKeySymbol GetSymbolForStringCaseSensitive( HKeySymbol &hCaseInsensitiveSymbol, const char *name, bool bCreate = true ) = 0;
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};
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VSTDLIB_INTERFACE IKeyValuesSystem *KeyValuesSystem();
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// #define KEYVALUESSYSTEM_INTERFACE_VERSION "KeyValuesSystem002"
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#endif // VSTDLIB_IKEYVALUESSYSTEM_H
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