path: root/MdeModulePkg/Universal/Console/TerminalDxe/Terminal.h

/*++

Copyright (c) 2006, Intel Corporation                                                         
All rights reserved. This program and the accompanying materials                          
are licensed and made available under the terms and conditions of the BSD License         
which accompanies this distribution.  The full text of the license may be found at        
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

Module Name:

  terminal.h

Abstract:

  
Revision History

--*/

#ifndef _TERMINAL_H
#define _TERMINAL_H


#include <PiDxe.h>
#include <Protocol/SimpleTextOut.h>
#include <Protocol/SerialIo.h>
#include <Guid/GlobalVariable.h>
#include <Protocol/DevicePath.h>
#include <Protocol/SimpleTextIn.h>
#include <Protocol/SimpleTextInEx.h>
#include <Guid/HotPlugDevice.h>
#include <Guid/PcAnsi.h>
#include <Library/DebugLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/UefiLib.h>
#include <Library/ReportStatusCodeLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/DevicePathLib.h>
#include <Library/PcdLib.h>
#include <Library/BaseLib.h>


#define RAW_FIFO_MAX_NUMBER 256
#define FIFO_MAX_NUMBER     128

typedef struct {
  UINT8 Head;
  UINT8 Tail;
  UINT8 Data[RAW_FIFO_MAX_NUMBER + 1];
} RAW_DATA_FIFO;

typedef struct {
  UINT8   Head;
  UINT8   Tail;
  UINT16  Data[FIFO_MAX_NUMBER + 1];
} UNICODE_FIFO;

typedef struct {
  UINT8         Head;
  UINT8         Tail;
  EFI_INPUT_KEY Data[FIFO_MAX_NUMBER + 1];
} EFI_KEY_FIFO;

#define TERMINAL_DEV_SIGNATURE  EFI_SIGNATURE_32 ('t', 'm', 'n', 'l')

#define TERMINAL_CONSOLE_IN_EX_NOTIFY_SIGNATURE EFI_SIGNATURE_32 ('t', 'm', 'e', 'n')

typedef struct _TERMINAL_CONSOLE_IN_EX_NOTIFY {
  UINTN                                 Signature;
  EFI_HANDLE                            NotifyHandle;
  EFI_KEY_DATA                          KeyData;
  EFI_KEY_NOTIFY_FUNCTION               KeyNotificationFn;
  LIST_ENTRY                            NotifyEntry;
} TERMINAL_CONSOLE_IN_EX_NOTIFY;
typedef struct {
  UINTN                               Signature;
  EFI_HANDLE                          Handle;
  UINT8                               TerminalType;
  EFI_SERIAL_IO_PROTOCOL              *SerialIo;
  EFI_DEVICE_PATH_PROTOCOL            *DevicePath;
  EFI_SIMPLE_TEXT_INPUT_PROTOCOL      SimpleInput;
  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL     SimpleTextOutput;
  EFI_SIMPLE_TEXT_OUTPUT_MODE         SimpleTextOutputMode;
  UINTN                               SerialInTimeOut;
  RAW_DATA_FIFO                       RawFiFo;
  UNICODE_FIFO                        UnicodeFiFo;
  EFI_KEY_FIFO                        EfiKeyFiFo;
  EFI_UNICODE_STRING_TABLE            *ControllerNameTable;
  EFI_EVENT                           TwoSecondTimeOut;
  UINT32                              InputState;
  UINT32                              ResetState;

  //
  // Esc could not be output to the screen by user,
  // but the terminal driver need to output it to
  // the terminal emulation software to send control sequence.
  // This boolean is used by the terminal driver only
  // to indicate whether the Esc could be sent or not.
  //
  BOOLEAN                             OutputEscChar;
  EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL   SimpleInputEx;
  LIST_ENTRY                          NotifyList;
} TERMINAL_DEV;

#define INPUT_STATE_DEFAULT               0x00
#define INPUT_STATE_ESC                   0x01
#define INPUT_STATE_CSI                   0x02
#define INPUT_STATE_LEFTOPENBRACKET       0x04
#define INPUT_STATE_O                     0x08
#define INPUT_STATE_2                     0x10

#define RESET_STATE_DEFAULT               0x00
#define RESET_STATE_ESC_R                 0x01
#define RESET_STATE_ESC_R_ESC_r           0x02

#define TERMINAL_CON_IN_DEV_FROM_THIS(a)  CR (a, TERMINAL_DEV, SimpleInput, TERMINAL_DEV_SIGNATURE)
#define TERMINAL_CON_OUT_DEV_FROM_THIS(a) CR (a, TERMINAL_DEV, SimpleTextOutput, TERMINAL_DEV_SIGNATURE)
#define TERMINAL_CON_IN_EX_DEV_FROM_THIS(a)  CR (a, TERMINAL_DEV, SimpleInputEx, TERMINAL_DEV_SIGNATURE)

typedef union {
  UINT8 Utf8_1;
  UINT8 Utf8_2[2];
  UINT8 Utf8_3[3];
} UTF8_CHAR;

#define PcAnsiType                0
#define VT100Type                 1
#define VT100PlusType             2
#define VTUTF8Type                3

#define LEFTOPENBRACKET           0x5b  // '['
#define ACAP                      0x41
#define BCAP                      0x42
#define CCAP                      0x43
#define DCAP                      0x44

#define MODE0_COLUMN_COUNT        80
#define MODE0_ROW_COUNT           25

#define MODE1_COLUMN_COUNT        100
#define MODE1_ROW_COUNT           31
#define BACKSPACE                 8
#define ESC                       27
#define CSI                       0x9B
#define DEL                       127
#define BRIGHT_CONTROL_OFFSET     2
#define FOREGROUND_CONTROL_OFFSET 6
#define BACKGROUND_CONTROL_OFFSET 11
#define ROW_OFFSET                2
#define COLUMN_OFFSET             5

typedef struct {
  UINT16  Unicode;
  CHAR8   PcAnsi;
  CHAR8   Ascii;
} UNICODE_TO_CHAR;

//
// Global Variables
//
extern EFI_DRIVER_BINDING_PROTOCOL   gTerminalDriverBinding;
extern EFI_COMPONENT_NAME_PROTOCOL   gTerminalComponentName;
extern EFI_COMPONENT_NAME2_PROTOCOL  gTerminalComponentName2;

extern EFI_GUID                      gSimpleTextInExNotifyGuid;
//
// Prototypes
//
EFI_STATUS
EFIAPI
InitializeTerminal (
  IN EFI_HANDLE         ImageHandle,
  IN EFI_SYSTEM_TABLE   *SystemTable
  )
;

EFI_STATUS
EFIAPI
TerminalConInReset (
  IN  EFI_SIMPLE_TEXT_INPUT_PROTOCOL    *This,
  IN  BOOLEAN                           ExtendedVerification
  )
;

EFI_STATUS
EFIAPI
TerminalConInReadKeyStroke (
  IN  EFI_SIMPLE_TEXT_INPUT_PROTOCOL  *This,
  OUT EFI_INPUT_KEY                   *Key
  )
;


BOOLEAN
IsKeyRegistered (
  IN EFI_KEY_DATA  *RegsiteredData,
  IN EFI_KEY_DATA  *InputData
  )
/*++

Routine Description:

Arguments:

  RegsiteredData    - A pointer to a buffer that is filled in with the keystroke 
                      state data for the key that was registered.
  InputData         - A pointer to a buffer that is filled in with the keystroke 
                      state data for the key that was pressed.

Returns:
  TRUE              - Key be pressed matches a registered key.
  FLASE             - Match failed. 
  
--*/
;

VOID
EFIAPI
TerminalConInWaitForKeyEx (
  IN  EFI_EVENT       Event,
  IN  VOID            *Context
  )
;  
//
// Simple Text Input Ex protocol prototypes
//

EFI_STATUS
EFIAPI
TerminalConInResetEx (
  IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,
  IN BOOLEAN                            ExtendedVerification
  )
/*++

  Routine Description:
    Reset the input device and optionaly run diagnostics

  Arguments:
    This                 - Protocol instance pointer.
    ExtendedVerification - Driver may perform diagnostics on reset.

  Returns:
    EFI_SUCCESS           - The device was reset.
    EFI_DEVICE_ERROR      - The device is not functioning properly and could 
                            not be reset.

--*/
;

EFI_STATUS
EFIAPI
TerminalConInReadKeyStrokeEx (
  IN  EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
  OUT EFI_KEY_DATA                      *KeyData
  )
/*++

  Routine Description:
    Reads the next keystroke from the input device. The WaitForKey Event can 
    be used to test for existance of a keystroke via WaitForEvent () call.

  Arguments:
    This       - Protocol instance pointer.
    KeyData    - A pointer to a buffer that is filled in with the keystroke 
                 state data for the key that was pressed.

  Returns:
    EFI_SUCCESS           - The keystroke information was returned.
    EFI_NOT_READY         - There was no keystroke data availiable.
    EFI_DEVICE_ERROR      - The keystroke information was not returned due to 
                            hardware errors.
    EFI_INVALID_PARAMETER - KeyData is NULL.                        

--*/
;

EFI_STATUS
EFIAPI
TerminalConInSetState (
  IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,
  IN EFI_KEY_TOGGLE_STATE               *KeyToggleState
  )
/*++

  Routine Description:
    Set certain state for the input device.

  Arguments:
    This                  - Protocol instance pointer.
    KeyToggleState        - A pointer to the EFI_KEY_TOGGLE_STATE to set the 
                            state for the input device.
                          
  Returns:                
    EFI_SUCCESS           - The device state was set successfully.
    EFI_DEVICE_ERROR      - The device is not functioning correctly and could 
                            not have the setting adjusted.
    EFI_UNSUPPORTED       - The device does not have the ability to set its state.
    EFI_INVALID_PARAMETER - KeyToggleState is NULL.                       

--*/   
;

EFI_STATUS
EFIAPI
TerminalConInRegisterKeyNotify (
  IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,
  IN EFI_KEY_DATA                       *KeyData,
  IN EFI_KEY_NOTIFY_FUNCTION            KeyNotificationFunction,
  OUT EFI_HANDLE                        *NotifyHandle
  )
/*++

  Routine Description:
    Register a notification function for a particular keystroke for the input device.

  Arguments:
    This                    - Protocol instance pointer.
    KeyData                 - A pointer to a buffer that is filled in with the keystroke 
                              information data for the key that was pressed.
    KeyNotificationFunction - Points to the function to be called when the key 
                              sequence is typed specified by KeyData.                        
    NotifyHandle            - Points to the unique handle assigned to the registered notification.                          

  Returns:
    EFI_SUCCESS             - The notification function was registered successfully.
    EFI_OUT_OF_RESOURCES    - Unable to allocate resources for necesssary data structures.
    EFI_INVALID_PARAMETER   - KeyData or NotifyHandle is NULL.                       
                              
--*/   
;

EFI_STATUS
EFIAPI
TerminalConInUnregisterKeyNotify (
  IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,
  IN EFI_HANDLE                         NotificationHandle
  )
/*++

  Routine Description:
    Remove a registered notification function from a particular keystroke.

  Arguments:
    This                    - Protocol instance pointer.    
    NotificationHandle      - The handle of the notification function being unregistered.

  Returns:
    EFI_SUCCESS             - The notification function was unregistered successfully.
    EFI_INVALID_PARAMETER   - The NotificationHandle is invalid.
    EFI_NOT_FOUND           - Can not find the matching entry in database.  
                              
--*/   
;

VOID
EFIAPI
TerminalConInWaitForKey (
  IN  EFI_EVENT     Event,
  IN  VOID          *Context
  )
;

EFI_STATUS
EFIAPI
TerminalConOutReset (
  IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL    *This,
  IN  BOOLEAN                            ExtendedVerification
  )
;

EFI_STATUS
EFIAPI
TerminalConOutOutputString (
  IN   EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
  IN  CHAR16                            *WString
  )
;

EFI_STATUS
EFIAPI
TerminalConOutTestString (
  IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
  IN  CHAR16                           *WString
  )
;

EFI_STATUS
EFIAPI
TerminalConOutQueryMode (
  IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
  IN  UINTN                            ModeNumber,
  OUT UINTN                            *Columns,
  OUT UINTN                            *Rows
  )
;

EFI_STATUS
EFIAPI
TerminalConOutSetMode (
  IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
  IN  UINTN                            ModeNumber
  )
;

EFI_STATUS
EFIAPI
TerminalConOutSetAttribute (
  IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
  IN  UINTN                            Attribute
  )
;

EFI_STATUS
EFIAPI
TerminalConOutClearScreen (
  IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This
  )
;

EFI_STATUS
EFIAPI
TerminalConOutSetCursorPosition (
  IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
  IN  UINTN                            Column,
  IN  UINTN                            Row
  )
;

EFI_STATUS
EFIAPI
TerminalConOutEnableCursor (
  IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
  IN  BOOLEAN                          Visible
  )
;

EFI_STATUS
EFIAPI
TerminalDriverBindingSupported (
  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN EFI_HANDLE                     Controller,
  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
  );

EFI_STATUS
EFIAPI
TerminalDriverBindingStart (
  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN EFI_HANDLE                     Controller,
  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
  );

EFI_STATUS
EFIAPI
TerminalDriverBindingStop (
  IN  EFI_DRIVER_BINDING_PROTOCOL    *This,
  IN  EFI_HANDLE                     Controller,
  IN  UINTN                          NumberOfChildren,
  IN  EFI_HANDLE                     *ChildHandleBuffer
  );

/**
  Retrieves a Unicode string that is the user readable name of the driver.

  This function retrieves the user readable name of a driver in the form of a
  Unicode string. If the driver specified by This has a user readable name in
  the language specified by Language, then a pointer to the driver name is
  returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
  by This does not support the language specified by Language,
  then EFI_UNSUPPORTED is returned.

  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
                                EFI_COMPONENT_NAME_PROTOCOL instance.

  @param  Language[in]          A pointer to a Null-terminated ASCII string
                                array indicating the language. This is the
                                language of the driver name that the caller is
                                requesting, and it must match one of the
                                languages specified in SupportedLanguages. The
                                number of languages supported by a driver is up
                                to the driver writer. Language is specified
                                in RFC 3066 or ISO 639-2 language code format.

  @param  DriverName[out]       A pointer to the Unicode string to return.
                                This Unicode string is the name of the
                                driver specified by This in the language
                                specified by Language.

  @retval EFI_SUCCESS           The Unicode string for the Driver specified by
                                This and the language specified by Language was
                                returned in DriverName.

  @retval EFI_INVALID_PARAMETER Language is NULL.

  @retval EFI_INVALID_PARAMETER DriverName is NULL.

  @retval EFI_UNSUPPORTED       The driver specified by This does not support
                                the language specified by Language.

**/
EFI_STATUS
EFIAPI
TerminalComponentNameGetDriverName (
  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
  IN  CHAR8                        *Language,
  OUT CHAR16                       **DriverName
  );


/**
  Retrieves a Unicode string that is the user readable name of the controller
  that is being managed by a driver.

  This function retrieves the user readable name of the controller specified by
  ControllerHandle and ChildHandle in the form of a Unicode string. If the
  driver specified by This has a user readable name in the language specified by
  Language, then a pointer to the controller name is returned in ControllerName,
  and EFI_SUCCESS is returned.  If the driver specified by This is not currently
  managing the controller specified by ControllerHandle and ChildHandle,
  then EFI_UNSUPPORTED is returned.  If the driver specified by This does not
  support the language specified by Language, then EFI_UNSUPPORTED is returned.

  @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
                                EFI_COMPONENT_NAME_PROTOCOL instance.

  @param  ControllerHandle[in]  The handle of a controller that the driver
                                specified by This is managing.  This handle
                                specifies the controller whose name is to be
                                returned.

  @param  ChildHandle[in]       The handle of the child controller to retrieve
                                the name of.  This is an optional parameter that
                                may be NULL.  It will be NULL for device
                                drivers.  It will also be NULL for a bus drivers
                                that wish to retrieve the name of the bus
                                controller.  It will not be NULL for a bus
                                driver that wishes to retrieve the name of a
                                child controller.

  @param  Language[in]          A pointer to a Null-terminated ASCII string
                                array indicating the language.  This is the
                                language of the driver name that the caller is
                                requesting, and it must match one of the
                                languages specified in SupportedLanguages. The
                                number of languages supported by a driver is up
                                to the driver writer. Language is specified in
                                RFC 3066 or ISO 639-2 language code format.

  @param  ControllerName[out]   A pointer to the Unicode string to return.
                                This Unicode string is the name of the
                                controller specified by ControllerHandle and
                                ChildHandle in the language specified by
                                Language from the point of view of the driver
                                specified by This.

  @retval EFI_SUCCESS           The Unicode string for the user readable name in
                                the language specified by Language for the
                                driver specified by This was returned in
                                DriverName.

  @retval EFI_INVALID_PARAMETER ControllerHandle is not a valid EFI_HANDLE.

  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
                                EFI_HANDLE.

  @retval EFI_INVALID_PARAMETER Language is NULL.

  @retval EFI_INVALID_PARAMETER ControllerName is NULL.

  @retval EFI_UNSUPPORTED       The driver specified by This is not currently
                                managing the controller specified by
                                ControllerHandle and ChildHandle.

  @retval EFI_UNSUPPORTED       The driver specified by This does not support
                                the language specified by Language.

**/
EFI_STATUS
EFIAPI
TerminalComponentNameGetControllerName (
  IN  EFI_COMPONENT_NAME_PROTOCOL                     *This,
  IN  EFI_HANDLE                                      ControllerHandle,
  IN  EFI_HANDLE                                      ChildHandle        OPTIONAL,
  IN  CHAR8                                           *Language,
  OUT CHAR16                                          **ControllerName
  );


//
// internal functions
//
EFI_STATUS
TerminalConInCheckForKey (
  IN  EFI_SIMPLE_TEXT_INPUT_PROTOCOL  *This
  )
;

VOID
TerminalUpdateConsoleDevVariable (
  IN CHAR16                    *VariableName,
  IN EFI_DEVICE_PATH_PROTOCOL  *ParentDevicePath
  )
;

VOID
TerminalRemoveConsoleDevVariable (
  IN CHAR16                    *VariableName,
  IN EFI_DEVICE_PATH_PROTOCOL  *ParentDevicePath
  )
;

VOID                                *
TerminalGetVariableAndSize (
  IN  CHAR16              *Name,
  IN  EFI_GUID            *VendorGuid,
  OUT UINTN               *VariableSize
  )
;

EFI_STATUS
SetTerminalDevicePath (
  IN  UINT8                       TerminalType,
  IN  EFI_DEVICE_PATH_PROTOCOL    *ParentDevicePath,
  OUT EFI_DEVICE_PATH_PROTOCOL    **TerminalDevicePath
  )
;

VOID
InitializeRawFiFo (
  IN  TERMINAL_DEV  *TerminalDevice
  )
;

VOID
InitializeUnicodeFiFo (
  IN  TERMINAL_DEV  *TerminalDevice
  )
;

VOID
InitializeEfiKeyFiFo (
  IN  TERMINAL_DEV  *TerminalDevice
  )
;

EFI_STATUS
GetOneKeyFromSerial (
  EFI_SERIAL_IO_PROTOCOL  *SerialIo,
  UINT8                   *Input
  )
;

BOOLEAN
RawFiFoInsertOneKey (
  TERMINAL_DEV  *TerminalDevice,
  UINT8         Input
  )
;

BOOLEAN
RawFiFoRemoveOneKey (
  TERMINAL_DEV  *TerminalDevice,
  UINT8         *Output
  )
;

BOOLEAN
IsRawFiFoEmpty (
  TERMINAL_DEV  *TerminalDevice
  )
;

BOOLEAN
IsRawFiFoFull (
  TERMINAL_DEV  *TerminalDevice
  )
;

BOOLEAN
EfiKeyFiFoInsertOneKey (
  TERMINAL_DEV      *TerminalDevice,
  EFI_INPUT_KEY     Key
  )
;

BOOLEAN
EfiKeyFiFoRemoveOneKey (
  TERMINAL_DEV  *TerminalDevice,
  EFI_INPUT_KEY *Output
  )
;

BOOLEAN
IsEfiKeyFiFoEmpty (
  TERMINAL_DEV  *TerminalDevice
  )
;

BOOLEAN
IsEfiKeyFiFoFull (
  TERMINAL_DEV  *TerminalDevice
  )
;

BOOLEAN
UnicodeFiFoInsertOneKey (
  TERMINAL_DEV      *TerminalDevice,
  UINT16            Input
  )
;

BOOLEAN
UnicodeFiFoRemoveOneKey (
  TERMINAL_DEV  *TerminalDevice,
  UINT16        *Output
  )
;

BOOLEAN
IsUnicodeFiFoEmpty (
  TERMINAL_DEV  *TerminalDevice
  )
;

BOOLEAN
IsUnicodeFiFoFull (
  TERMINAL_DEV  *TerminalDevice
  )
;

UINT8
UnicodeFiFoGetKeyCount (
  TERMINAL_DEV    *TerminalDevice
  )
;

VOID
TranslateRawDataToEfiKey (
  IN  TERMINAL_DEV      *TerminalDevice
  )
;

//
// internal functions for PC ANSI
//
VOID
AnsiRawDataToUnicode (
  IN  TERMINAL_DEV    *PcAnsiDevice
  )
;

VOID
UnicodeToEfiKey (
  IN  TERMINAL_DEV    *PcAnsiDevice
  )
;

EFI_STATUS
AnsiTestString (
  IN  TERMINAL_DEV    *TerminalDevice,
  IN  CHAR16          *WString
  )
;

//
// internal functions for VT100
//
EFI_STATUS
VT100TestString (
  IN  TERMINAL_DEV    *VT100Device,
  IN  CHAR16          *WString
  )
;

//
// internal functions for VT100Plus
//
EFI_STATUS
VT100PlusTestString (
  IN  TERMINAL_DEV    *TerminalDevice,
  IN  CHAR16          *WString
  )
;

//
// internal functions for VTUTF8
//
VOID
VTUTF8RawDataToUnicode (
  IN  TERMINAL_DEV    *VtUtf8Device
  )
;

EFI_STATUS
VTUTF8TestString (
  IN  TERMINAL_DEV    *TerminalDevice,
  IN  CHAR16          *WString
  )
;

VOID
UnicodeToUtf8 (
  IN  CHAR16      Unicode,
  OUT UTF8_CHAR   *Utf8Char,
  OUT UINT8       *ValidBytes
  )
;

VOID
GetOneValidUtf8Char (
  IN  TERMINAL_DEV      *Utf8Device,
  OUT UTF8_CHAR         *Utf8Char,
  OUT UINT8             *ValidBytes
  )
;

VOID
Utf8ToUnicode (
  IN  UTF8_CHAR       Utf8Char,
  IN  UINT8           ValidBytes,
  OUT CHAR16          *UnicodeChar
  )
;

//
// functions for boxdraw unicode
//
BOOLEAN
TerminalIsValidTextGraphics (
  IN  CHAR16  Graphic,
  OUT CHAR8   *PcAnsi, OPTIONAL
  OUT CHAR8   *Ascii OPTIONAL
  )
;

BOOLEAN
TerminalIsValidAscii (
  IN  CHAR16  Ascii
  )
;

BOOLEAN
TerminalIsValidEfiCntlChar (
  IN  CHAR16  CharC
  )
;

#endif