#include <Uefi.h>
#include <Protocol/DevicePathUtilities.h>
#include <Protocol/DebugPort.h>
#include <Protocol/DevicePathToText.h>
#include <Protocol/DevicePathFromText.h>
#include <Guid/PcAnsi.h>
#include <Library/DebugLib.h>
#include <Library/PrintLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DevicePathLib.h>
#include <Library/PcdLib.h>
#include <IndustryStandard/Bluetooth.h>

Data Structures
struct	POOL_PRINT

struct	DEVICE_PATH_TO_TEXT_TABLE

struct	DEVICE_PATH_TO_TEXT_GENERIC_TABLE

struct	DEVICE_PATH_FROM_TEXT_TABLE

struct	USB_CLASS_TEXT

struct	VENDOR_DEFINED_HARDWARE_DEVICE_PATH

struct	VENDOR_DEFINED_MESSAGING_DEVICE_PATH

struct	VENDOR_DEFINED_MEDIA_DEVICE_PATH

struct	ACPI_EXTENDED_HID_DEVICE_PATH_WITH_STR

struct	ISCSI_DEVICE_PATH_WITH_NAME

struct	VENDOR_DEVICE_PATH_WITH_DATA

Macros
#define	IS_COMMA(a) ((a) == L',')

#define	IS_HYPHEN(a) ((a) == L'-')

#define	IS_DOT(a) ((a) == L'.')

#define	IS_LEFT_PARENTH(a) ((a) == L'(')

#define	IS_RIGHT_PARENTH(a) ((a) == L')')

#define	IS_SLASH(a) ((a) == L'/')

#define	IS_NULL(a) ((a) == L'\0')

#define	USB_CLASS_AUDIO 1

#define	USB_CLASS_CDCCONTROL 2

#define	USB_CLASS_HID 3

#define	USB_CLASS_IMAGE 6

#define	USB_CLASS_PRINTER 7

#define	USB_CLASS_MASS_STORAGE 8

#define	USB_CLASS_HUB 9

#define	USB_CLASS_CDCDATA 10

#define	USB_CLASS_SMART_CARD 11

#define	USB_CLASS_VIDEO 14

#define	USB_CLASS_DIAGNOSTIC 220

#define	USB_CLASS_WIRELESS 224

#define	USB_CLASS_RESERVE 254

#define	USB_SUBCLASS_FW_UPDATE 1

#define	USB_SUBCLASS_IRDA_BRIDGE 2

#define	USB_SUBCLASS_TEST 3

#define	RFC_1700_UDP_PROTOCOL 17

#define	RFC_1700_TCP_PROTOCOL 6

Typedefs
typedef EFI_DEVICE_PATH_PROTOCOL (	DEVICE_PATH_FROM_TEXT) (IN CHAR16 *Str)

typedef VOID(*	DEVICE_PATH_TO_TEXT) (IN OUT POOL_PRINT Str, IN VOID DevicePath, IN BOOLEAN DisplayOnly, IN BOOLEAN AllowShortcuts)

Functions
UINTN EFIAPI	UefiDevicePathLibGetDevicePathSize (IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath)

EFI_DEVICE_PATH_PROTOCOL *EFIAPI	UefiDevicePathLibDuplicateDevicePath (IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath)

EFI_DEVICE_PATH_PROTOCOL *EFIAPI	UefiDevicePathLibAppendDevicePath (IN CONST EFI_DEVICE_PATH_PROTOCOL FirstDevicePath OPTIONAL, IN CONST EFI_DEVICE_PATH_PROTOCOL SecondDevicePath OPTIONAL)

EFI_DEVICE_PATH_PROTOCOL *EFIAPI	UefiDevicePathLibAppendDevicePathNode (IN CONST EFI_DEVICE_PATH_PROTOCOL DevicePath OPTIONAL, IN CONST EFI_DEVICE_PATH_PROTOCOL DevicePathNode OPTIONAL)

EFI_DEVICE_PATH_PROTOCOL *EFIAPI	UefiDevicePathLibAppendDevicePathInstance (IN CONST EFI_DEVICE_PATH_PROTOCOL DevicePath OPTIONAL, IN CONST EFI_DEVICE_PATH_PROTOCOL DevicePathInstance OPTIONAL)

EFI_DEVICE_PATH_PROTOCOL *EFIAPI	UefiDevicePathLibGetNextDevicePathInstance (IN OUT EFI_DEVICE_PATH_PROTOCOL *DevicePath, OUT UINTN Size)

EFI_DEVICE_PATH_PROTOCOL *EFIAPI	UefiDevicePathLibCreateDeviceNode (IN UINT8 NodeType, IN UINT8 NodeSubType, IN UINT16 NodeLength)

BOOLEAN EFIAPI	UefiDevicePathLibIsDevicePathMultiInstance (IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath)

CHAR16 *EFIAPI	UefiDevicePathLibConvertDevicePathToText (IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath, IN BOOLEAN DisplayOnly, IN BOOLEAN AllowShortcuts)

CHAR16 *EFIAPI	UefiDevicePathLibConvertDeviceNodeToText (IN CONST EFI_DEVICE_PATH_PROTOCOL *DeviceNode, IN BOOLEAN DisplayOnly, IN BOOLEAN AllowShortcuts)

EFI_DEVICE_PATH_PROTOCOL *EFIAPI	UefiDevicePathLibConvertTextToDeviceNode (IN CONST CHAR16 *TextDeviceNode)

EFI_DEVICE_PATH_PROTOCOL *EFIAPI	UefiDevicePathLibConvertTextToDevicePath (IN CONST CHAR16 *TextDevicePath)

Detailed Description

Definition for Device Path library.

Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file UefiDevicePathLib.h.

Macro Definition Documentation

◆ IS_COMMA

#define IS_COMMA ( a ) ((a) == L',')

Definition at line 27 of file UefiDevicePathLib.h.

◆ IS_DOT

#define IS_DOT ( a ) ((a) == L'.')

Definition at line 29 of file UefiDevicePathLib.h.

◆ IS_HYPHEN

#define IS_HYPHEN ( a ) ((a) == L'-')

Definition at line 28 of file UefiDevicePathLib.h.

◆ IS_LEFT_PARENTH

#define IS_LEFT_PARENTH ( a ) ((a) == L'(')

Definition at line 30 of file UefiDevicePathLib.h.

◆ IS_NULL

#define IS_NULL ( a ) ((a) == L'\0')

Definition at line 33 of file UefiDevicePathLib.h.

◆ IS_RIGHT_PARENTH

#define IS_RIGHT_PARENTH ( a ) ((a) == L')')

Definition at line 31 of file UefiDevicePathLib.h.

◆ IS_SLASH

#define IS_SLASH ( a ) ((a) == L'/')

Definition at line 32 of file UefiDevicePathLib.h.

◆ RFC_1700_TCP_PROTOCOL

#define RFC_1700_TCP_PROTOCOL 6

Definition at line 101 of file UefiDevicePathLib.h.

◆ RFC_1700_UDP_PROTOCOL

#define RFC_1700_UDP_PROTOCOL 17

Definition at line 100 of file UefiDevicePathLib.h.

◆ USB_CLASS_AUDIO

#define USB_CLASS_AUDIO 1

Definition at line 82 of file UefiDevicePathLib.h.

◆ USB_CLASS_CDCCONTROL

#define USB_CLASS_CDCCONTROL 2

Definition at line 83 of file UefiDevicePathLib.h.

◆ USB_CLASS_CDCDATA

#define USB_CLASS_CDCDATA 10

Definition at line 89 of file UefiDevicePathLib.h.

◆ USB_CLASS_DIAGNOSTIC

#define USB_CLASS_DIAGNOSTIC 220

Definition at line 92 of file UefiDevicePathLib.h.

◆ USB_CLASS_HID

#define USB_CLASS_HID 3

Definition at line 84 of file UefiDevicePathLib.h.

◆ USB_CLASS_HUB

#define USB_CLASS_HUB 9

Definition at line 88 of file UefiDevicePathLib.h.

◆ USB_CLASS_IMAGE

#define USB_CLASS_IMAGE 6

Definition at line 85 of file UefiDevicePathLib.h.

◆ USB_CLASS_MASS_STORAGE

#define USB_CLASS_MASS_STORAGE 8

Definition at line 87 of file UefiDevicePathLib.h.

◆ USB_CLASS_PRINTER

#define USB_CLASS_PRINTER 7

Definition at line 86 of file UefiDevicePathLib.h.

◆ USB_CLASS_RESERVE

#define USB_CLASS_RESERVE 254

Definition at line 95 of file UefiDevicePathLib.h.

◆ USB_CLASS_SMART_CARD

#define USB_CLASS_SMART_CARD 11

Definition at line 90 of file UefiDevicePathLib.h.

◆ USB_CLASS_VIDEO

#define USB_CLASS_VIDEO 14

Definition at line 91 of file UefiDevicePathLib.h.

◆ USB_CLASS_WIRELESS

#define USB_CLASS_WIRELESS 224

Definition at line 93 of file UefiDevicePathLib.h.

◆ USB_SUBCLASS_FW_UPDATE

#define USB_SUBCLASS_FW_UPDATE 1

Definition at line 96 of file UefiDevicePathLib.h.

◆ USB_SUBCLASS_IRDA_BRIDGE

#define USB_SUBCLASS_IRDA_BRIDGE 2

Definition at line 97 of file UefiDevicePathLib.h.

◆ USB_SUBCLASS_TEST

#define USB_SUBCLASS_TEST 3

Definition at line 98 of file UefiDevicePathLib.h.

Typedef Documentation

◆ DEVICE_PATH_FROM_TEXT

typedef EFI_DEVICE_PATH_PROTOCOL *(* DEVICE_PATH_FROM_TEXT) (IN CHAR16 *Str)

Definition at line 45 of file UefiDevicePathLib.h.

◆ DEVICE_PATH_TO_TEXT

typedef VOID(* DEVICE_PATH_TO_TEXT) (IN OUT POOL_PRINT *Str, IN VOID *DevicePath, IN BOOLEAN DisplayOnly, IN BOOLEAN AllowShortcuts)

Definition at line 51 of file UefiDevicePathLib.h.

Function Documentation

◆ UefiDevicePathLibAppendDevicePath()

EFI_DEVICE_PATH_PROTOCOL *EFIAPI UefiDevicePathLibAppendDevicePath	(	IN CONST EFI_DEVICE_PATH_PROTOCOL *FirstDevicePath	OPTIONAL,
		IN CONST EFI_DEVICE_PATH_PROTOCOL *SecondDevicePath	OPTIONAL
	)

Creates a new device path by appending a second device path to a first device path.

This function creates a new device path by appending a copy of SecondDevicePath to a copy of FirstDevicePath in a newly allocated buffer. Only the end-of-device-path device node from SecondDevicePath is retained. The newly created device path is returned. If FirstDevicePath is NULL, then it is ignored, and a duplicate of SecondDevicePath is returned. If SecondDevicePath is NULL, then it is ignored, and a duplicate of FirstDevicePath is returned. If both FirstDevicePath and SecondDevicePath are NULL, then a copy of an end-of-device-path is returned.

If there is not enough memory for the newly allocated buffer, then NULL is returned. The memory for the new device path is allocated from EFI boot services memory. It is the responsibility of the caller to free the memory allocated.

Parameters

FirstDevicePath	A pointer to a device path data structure.
SecondDevicePath	A pointer to a device path data structure.

Return values

NULL	If there is not enough memory for the newly allocated buffer.
NULL	If FirstDevicePath or SecondDevicePath is invalid.
Others	A pointer to the new device path if success. Or a copy an end-of-device-path if both FirstDevicePath and SecondDevicePath are NULL.

Definition at line 452 of file DevicePathUtilities.c.

◆ UefiDevicePathLibAppendDevicePathInstance()

EFI_DEVICE_PATH_PROTOCOL *EFIAPI UefiDevicePathLibAppendDevicePathInstance	(	IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath	OPTIONAL,
		IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathInstance	OPTIONAL
	)

Creates a new device path by appending the specified device path instance to the specified device path.

This function creates a new device path by appending a copy of the device path instance specified by DevicePathInstance to a copy of the device path specified by DevicePath in a allocated buffer. The end-of-device-path device node is moved after the end of the appended device path instance and a new end-of-device-path-instance node is inserted between. If DevicePath is NULL, then a copy if DevicePathInstance is returned. If DevicePathInstance is NULL, then NULL is returned. If DevicePath or DevicePathInstance is invalid, then NULL is returned. If there is not enough memory to allocate space for the new device path, then NULL is returned. The memory is allocated from EFI boot services memory. It is the responsibility of the caller to free the memory allocated.

Parameters

DevicePath	A pointer to a device path data structure.
DevicePathInstance	A pointer to a device path instance.

Returns: A pointer to the new device path.

Definition at line 596 of file DevicePathUtilities.c.

◆ UefiDevicePathLibAppendDevicePathNode()

EFI_DEVICE_PATH_PROTOCOL *EFIAPI UefiDevicePathLibAppendDevicePathNode	(	IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath	OPTIONAL,
		IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathNode	OPTIONAL
	)

Creates a new path by appending the device node to the device path.

This function creates a new device path by appending a copy of the device node specified by DevicePathNode to a copy of the device path specified by DevicePath in an allocated buffer. The end-of-device-path device node is moved after the end of the appended device node. If DevicePathNode is NULL then a copy of DevicePath is returned. If DevicePath is NULL then a copy of DevicePathNode, followed by an end-of-device path device node is returned. If both DevicePathNode and DevicePath are NULL then a copy of an end-of-device-path device node is returned. If there is not enough memory to allocate space for the new device path, then NULL is returned. The memory is allocated from EFI boot services memory. It is the responsibility of the caller to free the memory allocated.

Parameters

DevicePath	A pointer to a device path data structure.
DevicePathNode	A pointer to a single device path node.

Return values

NULL	If there is not enough memory for the new device path.
Others	A pointer to the new device path if success. A copy of DevicePathNode followed by an end-of-device-path node if both FirstDevicePath and SecondDevicePath are NULL. A copy of an end-of-device-path node if both FirstDevicePath and SecondDevicePath are NULL.

Definition at line 531 of file DevicePathUtilities.c.

◆ UefiDevicePathLibConvertDeviceNodeToText()

CHAR16 *EFIAPI UefiDevicePathLibConvertDeviceNodeToText	(	IN CONST EFI_DEVICE_PATH_PROTOCOL *	DeviceNode,
		IN BOOLEAN	DisplayOnly,
		IN BOOLEAN	AllowShortcuts
	)

Converts a device node to its string representation.

Parameters

DeviceNode	A Pointer to the device node to be converted.
DisplayOnly	If DisplayOnly is TRUE, then the shorter text representation of the display node is used, where applicable. If DisplayOnly is FALSE, then the longer text representation of the display node is used.
AllowShortcuts	If AllowShortcuts is TRUE, then the shortcut forms of text representation for a device node can be used, where applicable.

Returns: A pointer to the allocated text representation of the device node or NULL if DeviceNode is NULL or there was insufficient memory.

Definition at line 2383 of file DevicePathToText.c.

◆ UefiDevicePathLibConvertDevicePathToText()

CHAR16 *EFIAPI UefiDevicePathLibConvertDevicePathToText	(	IN CONST EFI_DEVICE_PATH_PROTOCOL *	DevicePath,
		IN BOOLEAN	DisplayOnly,
		IN BOOLEAN	AllowShortcuts
	)

Converts a device path to its text representation.

Parameters

DevicePath	A Pointer to the device to be converted.
DisplayOnly	If DisplayOnly is TRUE, then the shorter text representation of the display node is used, where applicable. If DisplayOnly is FALSE, then the longer text representation of the display node is used.
AllowShortcuts	If AllowShortcuts is TRUE, then the shortcut forms of text representation for a device node can be used, where applicable.

Returns: A pointer to the allocated text representation of the device path or NULL if DeviceNode is NULL or there was insufficient memory.

Definition at line 2440 of file DevicePathToText.c.

◆ UefiDevicePathLibConvertTextToDeviceNode()

EFI_DEVICE_PATH_PROTOCOL *EFIAPI UefiDevicePathLibConvertTextToDeviceNode ( IN CONST CHAR16 * TextDeviceNode )

Convert text to the binary representation of a device node.

Parameters

TextDeviceNode TextDeviceNode points to the text representation of a device node. Conversion starts with the first character and continues until the first non-device node character.

Returns: A pointer to the EFI device node or NULL if TextDeviceNode is NULL or there was insufficient memory or text unsupported.

Definition at line 3736 of file DevicePathFromText.c.

◆ UefiDevicePathLibConvertTextToDevicePath()

EFI_DEVICE_PATH_PROTOCOL *EFIAPI UefiDevicePathLibConvertTextToDevicePath ( IN CONST CHAR16 * TextDevicePath )

Convert text to the binary representation of a device path.

Parameters

TextDevicePath TextDevicePath points to the text representation of a device path. Conversion starts with the first character and continues until the first non-device node character.

Returns: A pointer to the allocated device path or NULL if TextDeviceNode is NULL or there was insufficient memory.

Definition at line 3793 of file DevicePathFromText.c.

◆ UefiDevicePathLibCreateDeviceNode()

EFI_DEVICE_PATH_PROTOCOL *EFIAPI UefiDevicePathLibCreateDeviceNode	(	IN UINT8	NodeType,
		IN UINT8	NodeSubType,
		IN UINT16	NodeLength
	)

Creates a device node.

This function creates a new device node in a newly allocated buffer of size NodeLength and initializes the device path node header with NodeType and NodeSubType. The new device path node is returned. If NodeLength is smaller than a device path header, then NULL is returned. If there is not enough memory to allocate space for the new device path, then NULL is returned. The memory is allocated from EFI boot services memory. It is the responsibility of the caller to free the memory allocated.

Parameters

NodeType	The device node type for the new device node.
NodeSubType	The device node sub-type for the new device node.
NodeLength	The length of the new device node.

Returns: The new device path.

Definition at line 742 of file DevicePathUtilities.c.

◆ UefiDevicePathLibDuplicateDevicePath()

EFI_DEVICE_PATH_PROTOCOL *EFIAPI UefiDevicePathLibDuplicateDevicePath ( IN CONST EFI_DEVICE_PATH_PROTOCOL * DevicePath )

Creates a new copy of an existing device path.

This function allocates space for a new copy of the device path specified by DevicePath. If DevicePath is NULL, then NULL is returned. If the memory is successfully allocated, then the contents of DevicePath are copied to the newly allocated buffer, and a pointer to that buffer is returned. Otherwise, NULL is returned. The memory for the new device path is allocated from EFI boot services memory. It is the responsibility of the caller to free the memory allocated.

Parameters

DevicePath A pointer to a device path data structure.

Return values

NULL	DevicePath is NULL or invalid.
Others	A pointer to the duplicated device path.

Definition at line 405 of file DevicePathUtilities.c.

◆ UefiDevicePathLibGetDevicePathSize()

UINTN EFIAPI UefiDevicePathLibGetDevicePathSize ( IN CONST EFI_DEVICE_PATH_PROTOCOL * DevicePath )

Returns the size of a device path in bytes.

This function returns the size, in bytes, of the device path data structure specified by DevicePath including the end of device path node. If DevicePath is NULL or invalid, then 0 is returned.

Parameters

DevicePath A pointer to a device path data structure.

Return values

0	If DevicePath is NULL or invalid.
Others	The size of a device path in bytes.

Definition at line 359 of file DevicePathUtilities.c.

◆ UefiDevicePathLibGetNextDevicePathInstance()

EFI_DEVICE_PATH_PROTOCOL *EFIAPI UefiDevicePathLibGetNextDevicePathInstance	(	IN OUT EFI_DEVICE_PATH_PROTOCOL **	DevicePath,
		OUT UINTN *	Size
	)

Creates a copy of the current device path instance and returns a pointer to the next device path instance.

This function creates a copy of the current device path instance. It also updates DevicePath to point to the next device path instance in the device path (or NULL if no more) and updates Size to hold the size of the device path instance copy. If DevicePath is NULL, then NULL is returned. If DevicePath points to a invalid device path, then NULL is returned. If there is not enough memory to allocate space for the new device path, then NULL is returned. The memory is allocated from EFI boot services memory. It is the responsibility of the caller to free the memory allocated. If Size is NULL, then ASSERT().

Parameters

DevicePath	On input, this holds the pointer to the current device path instance. On output, this holds the pointer to the next device path instance or NULL if there are no more device path instances in the device path pointer to a device path data structure.
Size	On output, this holds the size of the device path instance, in bytes or zero, if DevicePath is NULL.

Returns: A pointer to the current device path instance.

Definition at line 667 of file DevicePathUtilities.c.

◆ UefiDevicePathLibIsDevicePathMultiInstance()

BOOLEAN EFIAPI UefiDevicePathLibIsDevicePathMultiInstance ( IN CONST EFI_DEVICE_PATH_PROTOCOL * DevicePath )

Determines if a device path is single or multi-instance.

This function returns TRUE if the device path specified by DevicePath is multi-instance. Otherwise, FALSE is returned. If DevicePath is NULL or invalid, then FALSE is returned.

Parameters

DevicePath A pointer to a device path data structure.

Return values

TRUE	DevicePath is multi-instance.
FALSE	DevicePath is not multi-instance, or DevicePath is NULL or invalid.

Definition at line 784 of file DevicePathUtilities.c.

Data Structures

Macros

Typedefs

Functions

Detailed Description

Macro Definition Documentation

◆ IS_COMMA

◆ IS_DOT

◆ IS_HYPHEN

◆ IS_LEFT_PARENTH

◆ IS_NULL

◆ IS_RIGHT_PARENTH

◆ IS_SLASH

◆ RFC_1700_TCP_PROTOCOL

◆ RFC_1700_UDP_PROTOCOL

◆ USB_CLASS_AUDIO

◆ USB_CLASS_CDCCONTROL

◆ USB_CLASS_CDCDATA

◆ USB_CLASS_DIAGNOSTIC

◆ USB_CLASS_HID

◆ USB_CLASS_HUB

◆ USB_CLASS_IMAGE

◆ USB_CLASS_MASS_STORAGE

◆ USB_CLASS_PRINTER

◆ USB_CLASS_RESERVE

◆ USB_CLASS_SMART_CARD

◆ USB_CLASS_VIDEO

◆ USB_CLASS_WIRELESS

◆ USB_SUBCLASS_FW_UPDATE

◆ USB_SUBCLASS_IRDA_BRIDGE

◆ USB_SUBCLASS_TEST

Typedef Documentation

◆ DEVICE_PATH_FROM_TEXT

◆ DEVICE_PATH_TO_TEXT

Function Documentation

◆ UefiDevicePathLibAppendDevicePath()

◆ UefiDevicePathLibAppendDevicePathInstance()

◆ UefiDevicePathLibAppendDevicePathNode()

◆ UefiDevicePathLibConvertDeviceNodeToText()

◆ UefiDevicePathLibConvertDevicePathToText()

◆ UefiDevicePathLibConvertTextToDeviceNode()

◆ UefiDevicePathLibConvertTextToDevicePath()

◆ UefiDevicePathLibCreateDeviceNode()

◆ UefiDevicePathLibDuplicateDevicePath()

◆ UefiDevicePathLibGetDevicePathSize()

◆ UefiDevicePathLibGetNextDevicePathInstance()

◆ UefiDevicePathLibIsDevicePathMultiInstance()