//========= Copyright � 1996-2005, Valve Corporation, All rights reserved. ============//

//

// Purpose: 

//

// $Workfile:     $

// $Date: 2006-08-13 06:34:30 -0500 (Sun, 13 Aug 2006) $

//

//-----------------------------------------------------------------------------

// $NoKeywords: $

//=============================================================================//

#ifndef CONVAR_H

#define CONVAR_H

#if _WIN32

#pragma once

#endif

#include "tier0/dbg.h"

#ifdef _WIN32

#define FORCEINLINE_CVAR FORCEINLINE

#elif _LINUX

#define FORCEINLINE_CVAR __inline__ FORCEINLINE

#else

#error "implement me"

#endif

// The default, no flags at all

#define FCVAR_NONE				0 

// Command to ConVars and ConCommands

// ConVar Systems

#define FCVAR_UNREGISTERED		(1<<0)	// If this is set, don't add to linked list, etc.

#define FCVAR_LAUNCHER			(1<<1)	// defined by launcher

#define FCVAR_GAMEDLL			(1<<2)	// defined by the game DLL

#define FCVAR_CLIENTDLL			(1<<3)  // defined by the client DLL

#define FCVAR_MATERIAL_SYSTEM	(1<<4)	// Defined by the material system.

#define FCVAR_DATACACHE			(1<<19)	// Defined by the datacache system.

#define FCVAR_STUDIORENDER		(1<<15)	// Defined by the studiorender system.

#define FCVAR_FILESYSTEM		(1<<21)	// Defined by the file system.

#define FCVAR_PLUGIN			(1<<18)	// Defined by a 3rd party plugin.

#define FCVAR_TOOLSYSTEM		(1<<20)	// Defined by an IToolSystem library

#define FCVAR_SOUNDSYSTEM		(1<<23)	// Defined by the soundsystem library

#define FCVAR_INPUTSYSTEM		(1<<25)	// Defined by the inputsystem dll

#define FCVAR_NETWORKSYSTEM		(1<<26) // Defined by the network system

// NOTE!! if you add a cvar system, add it here too!!!!

// the engine lacks a cvar flag, but needs it for xbox

// an engine cvar is thus a cvar not marked with any other system

#define FCVAR_NON_ENGINE		((FCVAR_LAUNCHER|FCVAR_GAMEDLL|FCVAR_CLIENTDLL|FCVAR_MATERIAL_SYSTEM|FCVAR_DATACACHE|FCVAR_STUDIORENDER|FCVAR_FILESYSTEM|FCVAR_PLUGIN|FCVAR_TOOLSYSTEM|FCVAR_SOUNDSYSTEM|FCVAR_INPUTSYSTEM|FCVAR_NETWORKSYSTEM))

// ConVar only

#define FCVAR_PROTECTED			(1<<5)  // It's a server cvar, but we don't send the data since it's a password, etc.  Sends 1 if it's not bland/zero, 0 otherwise as value

#define FCVAR_SPONLY			(1<<6)  // This cvar cannot be changed by clients connected to a multiplayer server.

#define	FCVAR_ARCHIVE			(1<<7)	// set to cause it to be saved to vars.rc

#define	FCVAR_NOTIFY			(1<<8)	// notifies players when changed

#define	FCVAR_USERINFO			(1<<9)	// changes the client's info string

#define FCVAR_CHEAT				(1<<14) // Only useable in singleplayer / debug / multiplayer & sv_cheats

#define FCVAR_PRINTABLEONLY		(1<<10)  // This cvar's string cannot contain unprintable characters ( e.g., used for player name etc ).

#define FCVAR_UNLOGGED			(1<<11)  // If this is a FCVAR_SERVER, don't log changes to the log file / console if we are creating a log

#define FCVAR_NEVER_AS_STRING	(1<<12)  // never try to print that cvar

// It's a ConVar that's shared between the client and the server.

// At signon, the values of all such ConVars are sent from the server to the client (skipped for local

//  client, of course )

// If a change is requested it must come from the console (i.e., no remote client changes)

// If a value is changed while a server is active, it's replicated to all connected clients

#define FCVAR_REPLICATED		(1<<13)	// server setting enforced on clients, TODO rename to FCAR_SERVER at some time

#define FCVAR_DEMO				(1<<16)  // record this cvar when starting a demo file

#define FCVAR_DONTRECORD		(1<<17)  // don't record these command in demofiles

#define FCVAR_NOT_CONNECTED		(1<<22)	// cvar cannot be changed by a client that is connected to a server

#define FCVAR_ARCHIVE_XBOX		(1<<24) // cvar written to config.cfg on the Xbox

// #define FCVAR_AVAILABLE			(1<<27)

// #define FCVAR_AVAILABLE			(1<<28)

// #define FCVAR_AVAILABLE			(1<<29)

// #define FCVAR_AVAILABLE			(1<<30)

// #define FCVAR_AVAILABLE			(1<<31)

class ConVar;

class ConCommand;

class ConCommandBase;

// Any executable that wants to use ConVars need to implement one of

// these to hook up access to console variables.

class IConCommandBaseAccessor

{

public:

	// Flags is a combination of FCVAR flags in cvar.h.

	// hOut is filled in with a handle to the variable.

	virtual bool RegisterConCommandBase( ConCommandBase *pVar )=0;

};

// You don't have to instantiate one of these, just call its 

// OneTimeInit function when your executable is initializing.

class ConCommandBaseMgr

{

public:

	// Call this ONCE when the executable starts up.

	static void	OneTimeInit( IConCommandBaseAccessor *pAccessor );

#ifdef _XBOX

	static bool Fixup( ConCommandBase* pConCommandBase );

#ifndef _RETAIL

	static void PublishCommands( bool bForce );

#endif

#endif

};

// Called when a ConVar changes value

typedef void ( *FnChangeCallback )( ConVar *var, char const *pOldString );

// Called when a ConCommand needs to execute

typedef void ( *FnCommandCallback )( void );

#define COMMAND_COMPLETION_MAXITEMS		64

#define COMMAND_COMPLETION_ITEM_LENGTH	64

// Returns 0 to COMMAND_COMPLETION_MAXITEMS worth of completion strings

typedef int  ( *FnCommandCompletionCallback )( char const *partial, char commands[ COMMAND_COMPLETION_MAXITEMS ][ COMMAND_COMPLETION_ITEM_LENGTH ] );

//-----------------------------------------------------------------------------

// Purpose: The base console invoked command/cvar interface

//-----------------------------------------------------------------------------

class ConCommandBase

{

	friend class ConCommandBaseMgr;

	friend class CCvar;

	friend class ConVar;

	friend class ConCommand;

public:

								ConCommandBase( void );

								ConCommandBase( char const *pName, char const *pHelpString = 0, 

									int flags = 0 );

	virtual						~ConCommandBase( void );

	virtual	bool				IsCommand( void ) const;

	// Check flag

	virtual bool				IsBitSet( int flag ) const;

	// Set flag

	virtual void				AddFlags( int flags );

	// Return name of cvar

	virtual char const			*GetName( void ) const;

	// Return help text for cvar

	virtual char const			*GetHelpText( void ) const;

	// Deal with next pointer

	const ConCommandBase		*GetNext( void ) const;

	void						SetNext( ConCommandBase *next );

	virtual bool				IsRegistered( void ) const;

	// Global methods

	static ConCommandBase const	*GetCommands( void );

	static void					AddToList( ConCommandBase *var );

	static void					RemoveFlaggedCommands( int flag );

	static void					RevertFlaggedCvars( int flag );

	static ConCommandBase const	*FindCommand( char const *name );

protected:

	virtual void				Create( char const *pName, char const *pHelpString = 0, 

									int flags = 0 );

	// Used internally by OneTimeInit to initialize.

	virtual void				Init();

	// Internal copy routine ( uses new operator from correct module )

	char						*CopyString( char const *from );

	// Next ConVar in chain

	ConCommandBase				*m_pNext;

private:

	// Has the cvar been added to the global list?

	bool						m_bRegistered;

	// Static data

	char const 					*m_pszName;

	char const 					*m_pszHelpString;

	// ConVar flags

	int							m_nFlags;

protected:

	// ConVars add themselves to this list for the executable. Then ConVarMgr::Init() runs through 

	// all the console variables and registers them.

	static ConCommandBase		*s_pConCommandBases;

	// ConVars in this executable use this 'global' to access values.

	static IConCommandBaseAccessor	*s_pAccessor;

public: // Hackalicous

	inline int GetFlags() const

	{

		return m_nFlags;

	}

	inline void SetFlags(int flags)	

	{ 

		m_nFlags = flags; 

	}

};

//-----------------------------------------------------------------------------

// Purpose: The console invoked command

//-----------------------------------------------------------------------------

class ConCommand : public ConCommandBase

{

friend class ConCommandBaseMgr;

friend class CCvar;

#ifdef _STATIC_LINKED

friend class G_ConCommand;

friend class C_ConCommand;

friend class M_ConCommand;

friend class S_ConCommand;

friend class D_ConCommand;

#endif

public:

	typedef ConCommandBase BaseClass;

								ConCommand( void );

								ConCommand( char const *pName, FnCommandCallback callback, 

									char const *pHelpString = 0, int flags = 0, FnCommandCompletionCallback completionFunc = 0 );

	virtual						~ConCommand( void );

	virtual	bool				IsCommand( void ) const;

	virtual int					AutoCompleteSuggest( char const *partial, char commands[ COMMAND_COMPLETION_MAXITEMS ][ COMMAND_COMPLETION_ITEM_LENGTH ] );

	virtual bool				CanAutoComplete( void );

	// Invoke the function

	virtual void				Dispatch( void );

private:

	virtual void				Create( char const *pName, FnCommandCallback callback, 

									char const *pHelpString = 0, int flags = 0, FnCommandCompletionCallback completionFunc = 0 );

	// Call this function when executing the command

	FnCommandCallback			m_fnCommandCallback;

	FnCommandCompletionCallback	m_fnCompletionCallback;

	bool						m_bHasCompletionCallback;

public: // Hackalicous

	inline FnCommandCallback GetCallback() const

	{ 

		return m_fnCommandCallback; 

	}

};

//-----------------------------------------------------------------------------

// Purpose: A console variable

//-----------------------------------------------------------------------------

class ConVar : public ConCommandBase

{

friend class ConCommandBaseMgr;

friend class CCvar;

friend class CDefaultCvar;

#ifdef _STATIC_LINKED

friend class G_ConVar;

friend class C_ConVar;

friend class M_ConVar;

friend class S_ConVar;

friend class D_ConVar;

#endif

public:

	typedef ConCommandBase BaseClass;

								ConVar( char const *pName, char const *pDefaultValue, int flags = 0);

								ConVar( char const *pName, char const *pDefaultValue, int flags, 

									char const *pHelpString );

								ConVar( char const *pName, char const *pDefaultValue, int flags, 

									char const *pHelpString, bool bMin, float fMin, bool bMax, float fMax );

								ConVar( char const *pName, char const *pDefaultValue, int flags, 

									char const *pHelpString, FnChangeCallback callback );

								ConVar( char const *pName, char const *pDefaultValue, int flags, 

									char const *pHelpString, bool bMin, float fMin, bool bMax, float fMax,

									FnChangeCallback callback );

	virtual						~ConVar( void );

	virtual bool				IsBitSet( int flag ) const;

	virtual char const*			GetHelpText( void ) const;

	virtual bool				IsRegistered( void ) const;

	virtual char const			*GetName( void ) const;

	virtual void				AddFlags( int flags );

	virtual	bool				IsCommand( void ) const;

	// Install a change callback (there shouldn't already be one....)

	void InstallChangeCallback( FnChangeCallback callback );

	// Retrieve value

	FORCEINLINE_CVAR float			GetFloat( void ) const;

	FORCEINLINE_CVAR int				GetInt( void ) const;

	FORCEINLINE_CVAR bool			GetBool() const {  return !!GetInt(); }

	FORCEINLINE_CVAR char const	   *GetString( void ) const;

	// Any function that allocates/frees memory needs to be virtual or else you'll have crashes

	//  from alloc/free across dll/exe boundaries.

	// These just call into the IConCommandBaseAccessor to check flags and set the var (which ends up calling InternalSetValue).

	virtual void				SetValue( char const *value );

	virtual void				SetValue( float value );

	virtual void				SetValue( int value );

	// Reset to default value

	void						Revert( void );

	// True if it has a min/max setting

	bool						GetMin( float& minVal ) const;

	bool						GetMax( float& maxVal ) const;

	char const					*GetDefault( void ) const;

	static void					RevertAll( void );

private:

	// Called by CCvar when the value of a var is changing.

	virtual void				InternalSetValue(char const *value);

	// For CVARs marked FCVAR_NEVER_AS_STRING

	virtual void				InternalSetFloatValue( float fNewValue );

	virtual void				InternalSetIntValue( int nValue );

	virtual bool				ClampValue( float& value );

	virtual void				ChangeStringValue( char const *tempVal );

	virtual void				Create( char const *pName, char const *pDefaultValue, int flags = 0,

									char const *pHelpString = 0, bool bMin = false, float fMin = 0.0,

									bool bMax = false, float fMax = false, FnChangeCallback callback = 0 );

	// Used internally by OneTimeInit to initialize.

	virtual void				Init();

private:

	// This either points to "this" or it points to the original declaration of a ConVar.

	// This allows ConVars to exist in separate modules, and they all use the first one to be declared.

	// m_pParent->m_pParent must equal m_pParent (ie: m_pParent must be the root, or original, ConVar).

	ConVar						*m_pParent;

	// Static data

	char const					*m_pszDefaultValue;

	// Value

	// Dynamically allocated

	char						*m_pszString;

	int							m_StringLength;

	// Values

	float						m_fValue;

	int							m_nValue;

	// Min/Max values

	bool						m_bHasMin;

	float						m_fMinVal;

	bool						m_bHasMax;

	float						m_fMaxVal;

	// Call this function when ConVar changes

	FnChangeCallback			m_fnChangeCallback;

public: // Hackalicous

	inline FnChangeCallback	GetCallback() const

	{

		return m_fnChangeCallback;

	}

	inline void SetMin(bool set, float min=0.0)

	{ 

		m_bHasMin = set; 

		m_fMinVal = min; 

	}

	inline void SetMax(bool set, float max=0.0)

	{

		m_bHasMax = set;

		m_fMaxVal = max; 

	}

};

//-----------------------------------------------------------------------------

// Purpose: Return ConVar value as a float

// Output : float

//-----------------------------------------------------------------------------

FORCEINLINE_CVAR float ConVar::GetFloat( void ) const

{

	return m_pParent->m_fValue;

}

//-----------------------------------------------------------------------------

// Purpose: Return ConVar value as an int

// Output : int

//-----------------------------------------------------------------------------

FORCEINLINE_CVAR int ConVar::GetInt( void ) const 

{

	return m_pParent->m_nValue;

}

//-----------------------------------------------------------------------------

// Purpose: Return ConVar value as a string, return "" for bogus string pointer, etc.

// Output : char const *

//-----------------------------------------------------------------------------

FORCEINLINE_CVAR char const *ConVar::GetString( void ) const 

{

	if ( m_nFlags & FCVAR_NEVER_AS_STRING )

	{

		return "FCVAR_NEVER_AS_STRING";

	}

	return ( m_pParent->m_pszString ) ? m_pParent->m_pszString : "";

}

#ifdef _STATIC_LINKED

// identifies subsystem via piggybacking constructors with flags

class G_ConCommand : public ConCommand

{

public:

	G_ConCommand(char const *pName, FnCommandCallback callback, char const *pHelpString = 0, int flags = 0, FnCommandCompletionCallback completionFunc = 0 ) :	ConCommand(pName, callback, pHelpString, flags|FCVAR_GAMEDLL, completionFunc) {}

};

class C_ConCommand : public ConCommand

{

public:

	C_ConCommand(char const *pName, FnCommandCallback callback, char const *pHelpString = 0, int flags = 0, FnCommandCompletionCallback completionFunc = 0 ) :	ConCommand(pName, callback, pHelpString, flags|FCVAR_CLIENTDLL, completionFunc) {}

};

class M_ConCommand : public ConCommand

{

public:

	M_ConCommand(char const *pName, FnCommandCallback callback, char const *pHelpString = 0, int flags = 0, FnCommandCompletionCallback completionFunc = 0 ) :	ConCommand(pName, callback, pHelpString, flags|FCVAR_MATERIAL_SYSTEM, completionFunc) {}

};

class S_ConCommand : public ConCommand

{

public:

	S_ConCommand(char const *pName, FnCommandCallback callback, char const *pHelpString = 0, int flags = 0, FnCommandCompletionCallback completionFunc = 0 ) :	ConCommand(pName, callback, pHelpString, flags|FCVAR_STUDIORENDER, completionFunc) {}

};

class D_ConCommand : public ConCommand

{

public:

	D_ConCommand(char const *pName, FnCommandCallback callback, char const *pHelpString = 0, int flags = 0, FnCommandCompletionCallback completionFunc = 0 ) :	ConCommand(pName, callback, pHelpString, flags|FCVAR_DATACACHE, completionFunc) {}

};

typedef void ( *G_FnChangeCallback )( G_ConVar *var, char const *pOldString );

typedef void ( *C_FnChangeCallback )( C_ConVar *var, char const *pOldString );

typedef void ( *M_FnChangeCallback )( M_ConVar *var, char const *pOldString );

typedef void ( *S_FnChangeCallback )( S_ConVar *var, char const *pOldString );

typedef void ( *D_FnChangeCallback )( D_ConVar *var, char const *pOldString );

class G_ConVar : public ConVar

{

public:

	G_ConVar( char const *pName, char const *pDefaultValue, int flags = 0) : ConVar(pName, pDefaultValue, flags|FCVAR_GAMEDLL) {}

	G_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString ) : ConVar(pName, pDefaultValue, flags|FCVAR_GAMEDLL, pHelpString ) {}

	G_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString, bool bMin, float fMin, bool bMax, float fMax ) : ConVar(pName, pDefaultValue, flags|FCVAR_GAMEDLL, pHelpString, bMin, fMin, bMax, fMax) {}

	G_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString, G_FnChangeCallback callback ) : ConVar(pName, pDefaultValue, flags|FCVAR_GAMEDLL, pHelpString, (FnChangeCallback)callback ) {}

	G_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString, bool bMin, float fMin, bool bMax, float fMax, G_FnChangeCallback callback ) : ConVar(pName, pDefaultValue, flags|FCVAR_GAMEDLL, pHelpString, bMin, fMin, bMax, fMax, (FnChangeCallback)callback ) {}

};

class C_ConVar : public ConVar

{

public:

	C_ConVar( char const *pName, char const *pDefaultValue, int flags = 0) : ConVar(pName, pDefaultValue, flags|FCVAR_CLIENTDLL) {}

	C_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString ) : ConVar(pName, pDefaultValue, flags|FCVAR_CLIENTDLL, pHelpString ) {}

	C_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString, bool bMin, float fMin, bool bMax, float fMax ) : ConVar(pName, pDefaultValue, flags|FCVAR_CLIENTDLL, pHelpString, bMin, fMin, bMax, fMax) {}

	C_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString, C_FnChangeCallback callback ) : ConVar(pName, pDefaultValue, flags|FCVAR_CLIENTDLL, pHelpString, (FnChangeCallback)callback ) {}

	C_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString, bool bMin, float fMin, bool bMax, float fMax, C_FnChangeCallback callback ) : ConVar(pName, pDefaultValue, flags|FCVAR_CLIENTDLL, pHelpString, bMin, fMin, bMax, fMax, (FnChangeCallback)callback ) {}

};

class M_ConVar : public ConVar

{

public:

	M_ConVar( char const *pName, char const *pDefaultValue, int flags = 0) : ConVar(pName, pDefaultValue, flags|FCVAR_MATERIAL_SYSTEM) {}

	M_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString ) : ConVar(pName, pDefaultValue, flags|FCVAR_MATERIAL_SYSTEM, pHelpString ) {}

	M_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString, bool bMin, float fMin, bool bMax, float fMax ) : ConVar(pName, pDefaultValue, flags|FCVAR_MATERIAL_SYSTEM, pHelpString, bMin, fMin, bMax, fMax) {}

	M_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString, M_FnChangeCallback callback ) : ConVar(pName, pDefaultValue, flags|FCVAR_MATERIAL_SYSTEM, pHelpString, (FnChangeCallback)callback ) {}

	M_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString, bool bMin, float fMin, bool bMax, float fMax, M_FnChangeCallback callback ) : ConVar(pName, pDefaultValue, flags|FCVAR_MATERIAL_SYSTEM, pHelpString, bMin, fMin, bMax, fMax, (FnChangeCallback)callback ) {}

};

class S_ConVar : public ConVar

{

public:

	S_ConVar( char const *pName, char const *pDefaultValue, int flags = 0) : ConVar(pName, pDefaultValue, flags|FCVAR_STUDIORENDER) {}

	S_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString ) : ConVar(pName, pDefaultValue, flags|FCVAR_STUDIORENDER, pHelpString ) {}

	S_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString, bool bMin, float fMin, bool bMax, float fMax ) : ConVar(pName, pDefaultValue, flags|FCVAR_STUDIORENDER, pHelpString, bMin, fMin, bMax, fMax) {}

	S_ConVar( char const *pName, char const *pDefaultValue, int flags, char const *pHelpString, M_FnChangeCallback callback ) : ConVar(pName, pDefaultValue, flags|FCVAR_STUDIORENDER, pHelpString, (FnChangeCallback)callback ) {}