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Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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source-engine/public/tier1/convar.h

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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $Workfile: $
// $Date: $
//
//-----------------------------------------------------------------------------
// $NoKeywords: $
//===========================================================================//
#ifndef CONVAR_H
#define CONVAR_H
#if _WIN32
#pragma once
#endif
#include "tier0/dbg.h"
#include "tier1/iconvar.h"
#include "tier1/utlvector.h"
#include "tier1/utlstring.h"
#include "icvar.h"
#ifdef _WIN32
#define FORCEINLINE_CVAR FORCEINLINE
#elif POSIX
#define FORCEINLINE_CVAR inline
#else
#error "implement me"
#endif
//-----------------------------------------------------------------------------
// Forward declarations
//-----------------------------------------------------------------------------
class ConVar;
class CCommand;
class ConCommand;
class ConCommandBase;
struct characterset_t;
//-----------------------------------------------------------------------------
// 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;
};
//-----------------------------------------------------------------------------
// Helper method for console development
//-----------------------------------------------------------------------------
#if defined( _X360 ) && !defined( _RETAIL )
void ConVar_PublishToVXConsole();
#endif
//-----------------------------------------------------------------------------
// Called when a ConCommand needs to execute
//-----------------------------------------------------------------------------
typedef void ( *FnCommandCallbackVoid_t )( void );
typedef void ( *FnCommandCallback_t )( const CCommand &command );
#define COMMAND_COMPLETION_MAXITEMS 64
#define COMMAND_COMPLETION_ITEM_LENGTH 64
//-----------------------------------------------------------------------------
// Returns 0 to COMMAND_COMPLETION_MAXITEMS worth of completion strings
//-----------------------------------------------------------------------------
typedef int ( *FnCommandCompletionCallback )( const char *partial, char commands[ COMMAND_COMPLETION_MAXITEMS ][ COMMAND_COMPLETION_ITEM_LENGTH ] );
//-----------------------------------------------------------------------------
// Interface version
//-----------------------------------------------------------------------------
class ICommandCallback
{
public:
virtual void CommandCallback( const CCommand &command ) = 0;
};
class ICommandCompletionCallback
{
public:
virtual int CommandCompletionCallback( const char *pPartial, CUtlVector< CUtlString > &commands ) = 0;
};
//-----------------------------------------------------------------------------
// Purpose: The base console invoked command/cvar interface
//-----------------------------------------------------------------------------
class ConCommandBase
{
friend class CCvar;
friend class ConVar;
friend class ConCommand;
friend void ConVar_Register( int nCVarFlag, IConCommandBaseAccessor *pAccessor );
friend void ConVar_PublishToVXConsole();
// FIXME: Remove when ConVar changes are done
friend class CDefaultCvar;
public:
ConCommandBase( void );
ConCommandBase( const char *pName, const char *pHelpString = 0,
int flags = 0 );
virtual ~ConCommandBase( void );
virtual bool IsCommand( void ) const;
// Check flag
virtual bool IsFlagSet( int flag ) const;
// Set flag
virtual void AddFlags( int flags );
// Return name of cvar
virtual const char *GetName( void ) const;
// Return help text for cvar
virtual const char *GetHelpText( void ) const;
// Deal with next pointer
const ConCommandBase *GetNext( void ) const;
ConCommandBase *GetNext( void );
virtual bool IsRegistered( void ) const;
// Returns the DLL identifier
virtual CVarDLLIdentifier_t GetDLLIdentifier() const;
protected:
virtual void CreateBase( const char *pName, const char *pHelpString = 0,
int flags = 0 );
// Used internally by OneTimeInit to initialize/shutdown
virtual void Init();
void Shutdown();
// Internal copy routine ( uses new operator from correct module )
char *CopyString( const char *from );
private:
// Next ConVar in chain
// Prior to register, it points to the next convar in the DLL.
// Once registered, though, m_pNext is reset to point to the next
// convar in the global list
ConCommandBase *m_pNext;
// Has the cvar been added to the global list?
bool m_bRegistered;
// Static data
const char *m_pszName;
const char *m_pszHelpString;
// ConVar flags
int m_nFlags;
protected:
// ConVars add themselves to this list for the executable.
// Then ConVar_Register runs through all the console variables
// and registers them into a global list stored in vstdlib.dll
static ConCommandBase *s_pConCommandBases;
// ConVars in this executable use this 'global' to access values.
static IConCommandBaseAccessor *s_pAccessor;
};
//-----------------------------------------------------------------------------
// Command tokenizer
//-----------------------------------------------------------------------------
class CCommand
{
public:
CCommand();
CCommand( int nArgC, const char **ppArgV );
bool Tokenize( const char *pCommand, characterset_t *pBreakSet = NULL );
void Reset();
int ArgC() const;
const char **ArgV() const;
const char *ArgS() const; // All args that occur after the 0th arg, in string form
const char *GetCommandString() const; // The entire command in string form, including the 0th arg
const char *operator[]( int nIndex ) const; // Gets at arguments
const char *Arg( int nIndex ) const; // Gets at arguments
// Helper functions to parse arguments to commands.
const char* FindArg( const char *pName ) const;
int FindArgInt( const char *pName, int nDefaultVal ) const;
static int MaxCommandLength();
static characterset_t* DefaultBreakSet();
private:
enum
{
COMMAND_MAX_ARGC = 64,
COMMAND_MAX_LENGTH = 512,
};
int m_nArgc;
int m_nArgv0Size;
char m_pArgSBuffer[ COMMAND_MAX_LENGTH ];
char m_pArgvBuffer[ COMMAND_MAX_LENGTH ];
const char* m_ppArgv[ COMMAND_MAX_ARGC ];
};
inline int CCommand::MaxCommandLength()
{
return COMMAND_MAX_LENGTH - 1;
}
inline int CCommand::ArgC() const
{
return m_nArgc;
}
inline const char **CCommand::ArgV() const
{
return m_nArgc ? (const char**)m_ppArgv : NULL;
}
inline const char *CCommand::ArgS() const
{
return m_nArgv0Size ? &m_pArgSBuffer[m_nArgv0Size] : "";
}
inline const char *CCommand::GetCommandString() const
{
return m_nArgc ? m_pArgSBuffer : "";
}
inline const char *CCommand::Arg( int nIndex ) const
{
// FIXME: Many command handlers appear to not be particularly careful
// about checking for valid argc range. For now, we're going to
// do the extra check and return an empty string if it's out of range
if ( nIndex < 0 || nIndex >= m_nArgc )
return "";
return m_ppArgv[nIndex];
}
inline const char *CCommand::operator[]( int nIndex ) const
{
return Arg( nIndex );
}
//-----------------------------------------------------------------------------
// Purpose: The console invoked command
//-----------------------------------------------------------------------------
class ConCommand : public ConCommandBase
{
friend class CCvar;
public:
typedef ConCommandBase BaseClass;
ConCommand( const char *pName, FnCommandCallbackVoid_t callback,
const char *pHelpString = 0, int flags = 0, FnCommandCompletionCallback completionFunc = 0 );
ConCommand( const char *pName, FnCommandCallback_t callback,
const char *pHelpString = 0, int flags = 0, FnCommandCompletionCallback completionFunc = 0 );
ConCommand( const char *pName, ICommandCallback *pCallback,
const char *pHelpString = 0, int flags = 0, ICommandCompletionCallback *pCommandCompletionCallback = 0 );
virtual ~ConCommand( void );
virtual bool IsCommand( void ) const;
virtual int AutoCompleteSuggest( const char *partial, CUtlVector< CUtlString > &commands );
virtual bool CanAutoComplete( void );
// Invoke the function
virtual void Dispatch( const CCommand &command );
private:
// NOTE: To maintain backward compat, we have to be very careful:
// All public virtual methods must appear in the same order always
// since engine code will be calling into this code, which *does not match*
// in the mod code; it's using slightly different, but compatible versions
// of this class. Also: Be very careful about adding new fields to this class.
// Those fields will not exist in the version of this class that is instanced
// in mod code.
// Call this function when executing the command
union
{
FnCommandCallbackVoid_t m_fnCommandCallbackV1;
FnCommandCallback_t m_fnCommandCallback;
ICommandCallback *m_pCommandCallback;
};
union
{
FnCommandCompletionCallback m_fnCompletionCallback;
ICommandCompletionCallback *m_pCommandCompletionCallback;
};
bool m_bHasCompletionCallback : 1;
bool m_bUsingNewCommandCallback : 1;
bool m_bUsingCommandCallbackInterface : 1;
};
//-----------------------------------------------------------------------------
// Purpose: A console variable
//-----------------------------------------------------------------------------
class ConVar : public ConCommandBase, public IConVar
{
friend class CCvar;
friend class ConVarRef;
public:
typedef ConCommandBase BaseClass;
ConVar( const char *pName, const char *pDefaultValue, int flags = 0);
ConVar( const char *pName, const char *pDefaultValue, int flags,
const char *pHelpString );
ConVar( const char *pName, const char *pDefaultValue, int flags,
const char *pHelpString, bool bMin, float fMin, bool bMax, float fMax );
ConVar( const char *pName, const char *pDefaultValue, int flags,
const char *pHelpString, FnChangeCallback_t callback );
ConVar( const char *pName, const char *pDefaultValue, int flags,
const char *pHelpString, bool bMin, float fMin, bool bMax, float fMax,
FnChangeCallback_t callback );
ConVar( const char *pName, const char *pDefaultValue, int flags,
const char *pHelpString, bool bMin, float fMin, bool bMax, float fMax,
bool bCompMin, float fCompMin, bool bCompMax, float fCompMax,
FnChangeCallback_t callback );
virtual ~ConVar( void );
virtual bool IsFlagSet( int flag ) const;
virtual const char* GetHelpText( void ) const;
virtual bool IsRegistered( void ) const;
virtual const char *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_t 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( const char *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;
const char *GetDefault( void ) const;
void SetDefault( const char *pszDefault );
// True if it has a min/max competitive setting
bool GetCompMin( float& minVal ) const;
bool GetCompMax( float& maxVal ) const;
FORCEINLINE_CVAR bool IsCompetitiveRestricted() const;
bool SetCompetitiveMode( bool bCompetitive );
private:
// Called by CCvar when the value of a var is changing.
virtual void InternalSetValue(const char *value);
// For CVARs marked FCVAR_NEVER_AS_STRING
virtual void InternalSetFloatValue( float fNewValue, bool bForce = false );
virtual void InternalSetIntValue( int nValue );
virtual bool ClampValue( float& value );
virtual void ChangeStringValue( const char *tempVal, float flOldValue );
void Create( const char *pName, const char *pDefaultValue, int flags = 0,
const char *pHelpString = 0, bool bMin = false, float fMin = 0.0,
bool bMax = false, float fMax = 0.0,
bool bCompMin = false, float fCompMin = 0.0,
bool bCompMax = false, float fCompMax = 0.0,
FnChangeCallback_t callback = 0 );
// Used internally by OneTimeInit to initialize.
virtual void Init();
int GetFlags() { return m_pParent->m_nFlags; }
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
const char *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;
// Min/Max values for competitive.
bool m_bHasCompMin;
float m_fCompMinVal;
bool m_bHasCompMax;
float m_fCompMaxVal;
bool m_bCompetitiveRestrictions;
// Call this function when ConVar changes
FnChangeCallback_t m_fnChangeCallback;
};
//-----------------------------------------------------------------------------
// 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 : const char *
//-----------------------------------------------------------------------------
FORCEINLINE_CVAR const char *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 : "";
}
//-----------------------------------------------------------------------------
// Purpose: Return whether this convar is restricted for competitive play.
// Output : bool
//-----------------------------------------------------------------------------
FORCEINLINE_CVAR bool ConVar::IsCompetitiveRestricted() const
{
const int nFlags = m_pParent->m_nFlags;
const bool bHasCompSettings = m_pParent->m_bHasCompMin || m_pParent->m_bHasCompMax;
const bool bClientCanAdjust = ( nFlags & ( FCVAR_ARCHIVE | FCVAR_ALLOWED_IN_COMPETITIVE ) ) != 0;
const bool bInternalUseOnly = ( nFlags & ( FCVAR_HIDDEN | FCVAR_DEVELOPMENTONLY | FCVAR_INTERNAL_USE | FCVAR_GAMEDLL | FCVAR_REPLICATED | FCVAR_CHEAT ) ) != 0;
return bHasCompSettings || !( bClientCanAdjust || bInternalUseOnly );
}
//-----------------------------------------------------------------------------
// Used to read/write convars that already exist (replaces the FindVar method)
//-----------------------------------------------------------------------------
class ConVarRef
{
public:
ConVarRef( const char *pName );
ConVarRef( const char *pName, bool bIgnoreMissing );
ConVarRef( IConVar *pConVar );
void Init( const char *pName, bool bIgnoreMissing );
bool IsValid() const;
bool IsFlagSet( int nFlags ) const;
IConVar *GetLinkedConVar();
// Get/Set value
float GetFloat( void ) const;
int GetInt( void ) const;
bool GetBool() const { return !!GetInt(); }
const char *GetString( void ) const;
// True if it has a min/max setting
bool GetMin( float& minVal ) const;
bool GetMax( float& maxVal ) const;
void SetValue( const char *pValue );
void SetValue( float flValue );
void SetValue( int nValue );
void SetValue( bool bValue );
const char *GetName() const;
const char *GetDefault() const;
private:
// High-speed method to read convar data
IConVar *m_pConVar;
ConVar *m_pConVarState;
};
//-----------------------------------------------------------------------------
// Did we find an existing convar of that name?
//-----------------------------------------------------------------------------
FORCEINLINE_CVAR bool ConVarRef::IsFlagSet( int nFlags ) const
{
return ( m_pConVar->IsFlagSet( nFlags ) != 0 );
}
FORCEINLINE_CVAR IConVar *ConVarRef::GetLinkedConVar()
{
return m_pConVar;
}
FORCEINLINE_CVAR const char *ConVarRef::GetName() const
{
return m_pConVar->GetName();
}
//-----------------------------------------------------------------------------
// Purpose: Return ConVar value as a float
//-----------------------------------------------------------------------------
FORCEINLINE_CVAR float ConVarRef::GetFloat( void ) const
{
return m_pConVarState->m_fValue;
}
//-----------------------------------------------------------------------------
// Purpose: Return ConVar value as an int
//-----------------------------------------------------------------------------
FORCEINLINE_CVAR int ConVarRef::GetInt( void ) const
{
return m_pConVarState->m_nValue;
}
//-----------------------------------------------------------------------------
// Purpose: Return ConVar value as a string, return "" for bogus string pointer, etc.
//-----------------------------------------------------------------------------
FORCEINLINE_CVAR const char *ConVarRef::GetString( void ) const
{
Assert( !IsFlagSet( FCVAR_NEVER_AS_STRING ) );
return m_pConVarState->m_pszString;
}
FORCEINLINE_CVAR bool ConVarRef::GetMin( float& minVal ) const
{
return m_pConVarState->GetMin( minVal );
}
FORCEINLINE_CVAR bool ConVarRef::GetMax( float& maxVal ) const
{
return m_pConVarState->GetMax( maxVal );
}
FORCEINLINE_CVAR void ConVarRef::SetValue( const char *pValue )
{
m_pConVar->SetValue( pValue );
}
FORCEINLINE_CVAR void ConVarRef::SetValue( float flValue )
{
m_pConVar->SetValue( flValue );
}
FORCEINLINE_CVAR void ConVarRef::SetValue( int nValue )
{
m_pConVar->SetValue( nValue );
}
FORCEINLINE_CVAR void ConVarRef::SetValue( bool bValue )
{
m_pConVar->SetValue( bValue ? 1 : 0 );
}
FORCEINLINE_CVAR const char *ConVarRef::GetDefault() const
{
return m_pConVarState->m_pszDefaultValue;
}
//-----------------------------------------------------------------------------
// Called by the framework to register ConCommands with the ICVar
//-----------------------------------------------------------------------------
void ConVar_Register( int nCVarFlag = 0, IConCommandBaseAccessor *pAccessor = NULL );
void ConVar_Unregister( );
//-----------------------------------------------------------------------------
// Utility methods
//-----------------------------------------------------------------------------
void ConVar_PrintFlags( const ConCommandBase *var );
void ConVar_PrintDescription( const ConCommandBase *pVar );
//-----------------------------------------------------------------------------
// Purpose: Utility class to quickly allow ConCommands to call member methods
//-----------------------------------------------------------------------------
#pragma warning (disable : 4355 )
template< class T >
class CConCommandMemberAccessor : public ConCommand, public ICommandCallback, public ICommandCompletionCallback
{
typedef ConCommand BaseClass;
typedef void ( T::*FnMemberCommandCallback_t )( const CCommand &command );
typedef int ( T::*FnMemberCommandCompletionCallback_t )( const char *pPartial, CUtlVector< CUtlString > &commands );
public:
CConCommandMemberAccessor( T* pOwner, const char *pName, FnMemberCommandCallback_t callback, const char *pHelpString = 0,
int flags = 0, FnMemberCommandCompletionCallback_t completionFunc = 0 ) :
BaseClass( pName, this, pHelpString, flags, ( completionFunc != 0 ) ? this : NULL )
{
m_pOwner = pOwner;
m_Func = callback;
m_CompletionFunc = completionFunc;
}
~CConCommandMemberAccessor()
{
Shutdown();
}
void SetOwner( T* pOwner )
{
m_pOwner = pOwner;
}
virtual void CommandCallback( const CCommand &command )
{
Assert( m_pOwner && m_Func );
(m_pOwner->*m_Func)( command );
}
virtual int CommandCompletionCallback( const char *pPartial, CUtlVector< CUtlString > &commands )
{
Assert( m_pOwner && m_CompletionFunc );
return (m_pOwner->*m_CompletionFunc)( pPartial, commands );
}
private:
T* m_pOwner;
FnMemberCommandCallback_t m_Func;
FnMemberCommandCompletionCallback_t m_CompletionFunc;
};
#pragma warning ( default : 4355 )
//-----------------------------------------------------------------------------
// Purpose: Utility macros to quicky generate a simple console command
//-----------------------------------------------------------------------------
#define CON_COMMAND( name, description ) \
static void name( const CCommand &args ); \
static ConCommand name##_command( #name, name, description ); \
static void name( const CCommand &args )
#define CON_COMMAND_F( name, description, flags ) \
static void name( const CCommand &args ); \
static ConCommand name##_command( #name, name, description, flags ); \
static void name( const CCommand &args )
#define CON_COMMAND_F_COMPLETION( name, description, flags, completion ) \
static void name( const CCommand &args ); \
static ConCommand name##_command( #name, name, description, flags, completion ); \
static void name( const CCommand &args )
#define CON_COMMAND_EXTERN( name, _funcname, description ) \
void _funcname( const CCommand &args ); \
static ConCommand name##_command( #name, _funcname, description ); \
void _funcname( const CCommand &args )
#define CON_COMMAND_EXTERN_F( name, _funcname, description, flags ) \
void _funcname( const CCommand &args ); \
static ConCommand name##_command( #name, _funcname, description, flags ); \
void _funcname( const CCommand &args )
#define CON_COMMAND_MEMBER_F( _thisclass, name, _funcname, description, flags ) \
void _funcname( const CCommand &args ); \
friend class CCommandMemberInitializer_##_funcname; \
class CCommandMemberInitializer_##_funcname \
{ \
public: \
CCommandMemberInitializer_##_funcname() : m_ConCommandAccessor( NULL, name, &_thisclass::_funcname, description, flags ) \
{ \
m_ConCommandAccessor.SetOwner( GET_OUTER( _thisclass, m_##_funcname##_register ) ); \
} \
private: \
CConCommandMemberAccessor< _thisclass > m_ConCommandAccessor; \
}; \
\
CCommandMemberInitializer_##_funcname m_##_funcname##_register; \
#endif // CONVAR_H