environment varibles. Multi-instance device paths should never be placed\r
on a Handle.\r
\r
- Copyright (c) 2006, Intel Corporation \r
- All rights reserved. This program and the accompanying materials \r
+ Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>\r
+ This program and the accompanying materials \r
are licensed and made available under the terms and conditions of the BSD License \r
which accompanies this distribution. The full text of the license may be found at \r
- http://opensource.org/licenses/bsd-license.php \r
+ http://opensource.org/licenses/bsd-license.php. \r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
\r
- Module Name: UefiDevicePathLib.c\r
-\r
**/\r
\r
+\r
+#include "UefiDevicePathLib.h"\r
+\r
/**\r
- This function returns the size, in bytes, \r
- of the device path data structure specified by DevicePath.\r
- If DevicePath is NULL, then 0 is returned.\r
+ Returns the size of a device path in bytes.\r
+\r
+ This function returns the size, in bytes, of the device path data structure \r
+ specified by DevicePath including the end of device path node.\r
+ If DevicePath is NULL or invalid, then 0 is returned.\r
\r
- @param DevicePath A pointer to a device path data structure.\r
+ @param DevicePath A pointer to a device path data structure.\r
\r
- @return The size of a device path in bytes.\r
+ @retval 0 If DevicePath is NULL or invalid.\r
+ @retval Others The size of a device path in bytes.\r
\r
**/\r
UINTN\r
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath\r
)\r
{\r
- CONST EFI_DEVICE_PATH_PROTOCOL *Start;\r
-\r
- if (DevicePath == NULL) {\r
- return 0;\r
- }\r
-\r
- //\r
- // Search for the end of the device path structure\r
- //\r
- Start = DevicePath;\r
- while (!EfiIsDevicePathEnd (DevicePath)) {\r
- DevicePath = EfiNextDevicePathNode (DevicePath);\r
- }\r
-\r
- //\r
- // Compute the size and add back in the size of the end device path structure\r
- //\r
- return ((UINTN) DevicePath - (UINTN) Start) + sizeof (EFI_DEVICE_PATH_PROTOCOL);\r
+ return UefiDevicePathLibGetDevicePathSize (DevicePath);\r
}\r
\r
/**\r
- This function allocates space for a new copy of the device path\r
- specified by DevicePath.\r
-\r
- @param DevicePath A pointer to a device path data structure.\r
-\r
- @return The duplicated device path.\r
+ Creates a new copy of an existing device path.\r
+\r
+ This function allocates space for a new copy of the device path specified by DevicePath. \r
+ If DevicePath is NULL, then NULL is returned. If the memory is successfully \r
+ allocated, then the contents of DevicePath are copied to the newly allocated \r
+ buffer, and a pointer to that buffer is returned. Otherwise, NULL is returned. \r
+ The memory for the new device path is allocated from EFI boot services memory. \r
+ It is the responsibility of the caller to free the memory allocated. \r
+ \r
+ @param DevicePath A pointer to a device path data structure.\r
\r
+ @retval NULL DevicePath is NULL or invalid.\r
+ @retval Others A pointer to the duplicated device path.\r
+ \r
**/\r
EFI_DEVICE_PATH_PROTOCOL *\r
EFIAPI\r
DuplicateDevicePath (\r
- IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath\r
)\r
{\r
- EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r
- UINTN Size;\r
-\r
- //\r
- // Compute the size\r
- //\r
- Size = GetDevicePathSize (DevicePath);\r
- if (Size == 0) {\r
- return NULL;\r
- }\r
-\r
- //\r
- // Allocate space for duplicate device path\r
- //\r
- NewDevicePath = AllocateCopyPool (Size, DevicePath);\r
-\r
- return NewDevicePath;\r
+ return UefiDevicePathLibDuplicateDevicePath (DevicePath);\r
}\r
\r
/**\r
- This function appends the device path SecondDevicePath\r
- to every device path instance in FirstDevicePath. \r
-\r
- @param FirstDevicePath A pointer to a device path data structure.\r
+ Creates a new device path by appending a second device path to a first device path.\r
+\r
+ This function creates a new device path by appending a copy of SecondDevicePath \r
+ to a copy of FirstDevicePath in a newly allocated buffer. Only the end-of-device-path \r
+ device node from SecondDevicePath is retained. The newly created device path is \r
+ returned. If FirstDevicePath is NULL, then it is ignored, and a duplicate of \r
+ SecondDevicePath is returned. If SecondDevicePath is NULL, then it is ignored, \r
+ and a duplicate of FirstDevicePath is returned. If both FirstDevicePath and \r
+ SecondDevicePath are NULL, then a copy of an end-of-device-path is returned. \r
\r
- @param SecondDevicePath A pointer to a device path data structure.\r
+ If there is not enough memory for the newly allocated buffer, then NULL is returned.\r
+ The memory for the new device path is allocated from EFI boot services memory. \r
+ It is the responsibility of the caller to free the memory allocated.\r
\r
- @return A pointer to the new device path is returned.\r
- NULL is returned if space for the new device path could not be allocated from pool.\r
- It is up to the caller to free the memory used by FirstDevicePath and SecondDevicePath\r
- if they are no longer needed.\r
+ @param FirstDevicePath A pointer to a device path data structure.\r
+ @param SecondDevicePath A pointer to a device path data structure.\r
+ \r
+ @retval NULL If there is not enough memory for the newly allocated buffer.\r
+ @retval NULL If FirstDevicePath or SecondDevicePath is invalid.\r
+ @retval Others A pointer to the new device path if success.\r
+ Or a copy an end-of-device-path if both FirstDevicePath and SecondDevicePath are NULL.\r
\r
**/\r
EFI_DEVICE_PATH_PROTOCOL *\r
EFIAPI\r
AppendDevicePath (\r
- IN CONST EFI_DEVICE_PATH_PROTOCOL *FirstDevicePath,\r
- IN CONST EFI_DEVICE_PATH_PROTOCOL *SecondDevicePath\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *FirstDevicePath, OPTIONAL\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *SecondDevicePath OPTIONAL\r
)\r
{\r
- UINTN Size;\r
- UINTN Size1;\r
- UINTN Size2;\r
- EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r
- EFI_DEVICE_PATH_PROTOCOL *DevicePath2;\r
-\r
- //\r
- // If there's only 1 path, just duplicate it\r
- //\r
- if (FirstDevicePath == NULL) {\r
- return DuplicateDevicePath (SecondDevicePath);\r
- }\r
-\r
- if (SecondDevicePath == NULL) {\r
- return DuplicateDevicePath (FirstDevicePath);\r
- }\r
-\r
- //\r
- // Allocate space for the combined device path. It only has one end node of\r
- // length EFI_DEVICE_PATH_PROTOCOL\r
- //\r
- Size1 = GetDevicePathSize (FirstDevicePath);\r
- Size2 = GetDevicePathSize (SecondDevicePath);\r
- Size = Size1 + Size2 - sizeof (EFI_DEVICE_PATH_PROTOCOL);\r
-\r
- NewDevicePath = AllocatePool (Size);\r
-\r
- if (NewDevicePath != NULL) {\r
- NewDevicePath = CopyMem (NewDevicePath, FirstDevicePath, Size1);\r
- //\r
- // Over write Src1 EndNode and do the copy\r
- //\r
- DevicePath2 = (EFI_DEVICE_PATH_PROTOCOL *) ((CHAR8 *) NewDevicePath + (Size1 - sizeof (EFI_DEVICE_PATH_PROTOCOL)));\r
- CopyMem (DevicePath2, SecondDevicePath, Size2);\r
- }\r
-\r
- return NewDevicePath;\r
+ return UefiDevicePathLibAppendDevicePath (FirstDevicePath, SecondDevicePath);\r
}\r
\r
/**\r
- This function appends the device path node SecondDevicePath\r
- to every device path instance in FirstDevicePath.\r
-\r
- @param FirstDevicePath A pointer to a device path data structure.\r
- \r
- @param SecondDevicePath A pointer to a single device path node.\r
-\r
- @return A pointer to the new device path.\r
- If there is not enough temporary pool memory available to complete this function,\r
- then NULL is returned.\r
+ Creates a new path by appending the device node to the device path.\r
+\r
+ This function creates a new device path by appending a copy of the device node \r
+ specified by DevicePathNode to a copy of the device path specified by DevicePath \r
+ in an allocated buffer. The end-of-device-path device node is moved after the \r
+ end of the appended device node.\r
+ If DevicePathNode is NULL then a copy of DevicePath is returned.\r
+ If DevicePath is NULL then a copy of DevicePathNode, followed by an end-of-device \r
+ path device node is returned.\r
+ If both DevicePathNode and DevicePath are NULL then a copy of an end-of-device-path \r
+ device node is returned.\r
+ If there is not enough memory to allocate space for the new device path, then \r
+ NULL is returned. \r
+ The memory is allocated from EFI boot services memory. It is the responsibility \r
+ of the caller to free the memory allocated.\r
+\r
+ @param DevicePath A pointer to a device path data structure.\r
+ @param DevicePathNode A pointer to a single device path node.\r
+\r
+ @retval NULL If there is not enough memory for the new device path.\r
+ @retval Others A pointer to the new device path if success.\r
+ A copy of DevicePathNode followed by an end-of-device-path node \r
+ if both FirstDevicePath and SecondDevicePath are NULL.\r
+ A copy of an end-of-device-path node if both FirstDevicePath \r
+ and SecondDevicePath are NULL.\r
\r
**/\r
EFI_DEVICE_PATH_PROTOCOL *\r
EFIAPI\r
AppendDevicePathNode (\r
- IN CONST EFI_DEVICE_PATH_PROTOCOL *FirstDevicePath,\r
- IN CONST EFI_DEVICE_PATH_PROTOCOL *SecondDevicePath\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath, OPTIONAL\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathNode OPTIONAL\r
)\r
{\r
- EFI_DEVICE_PATH_PROTOCOL *NextNode;\r
- EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r
- UINTN NodeLength;\r
- UINTN Size1;\r
-\r
- //\r
- // Build a Node that has a terminator on it\r
- //\r
- NodeLength = DevicePathNodeLength (SecondDevicePath);\r
- Size1 = GetDevicePathSize (FirstDevicePath);\r
- \r
- NewDevicePath = AllocatePool (NodeLength + Size1);\r
- if (NewDevicePath != NULL) {\r
- //\r
- // Copy the first device path to the new device path\r
- //\r
- NewDevicePath = CopyMem (NewDevicePath, FirstDevicePath, Size1);\r
-\r
- //\r
- // Copy the device path node to the new device path\r
- //\r
- NextNode = (EFI_DEVICE_PATH_PROTOCOL *) ((CHAR8 *) NewDevicePath + (Size1 - sizeof (EFI_DEVICE_PATH_PROTOCOL)));\r
- NextNode = CopyMem (NextNode, SecondDevicePath, NodeLength);\r
-\r
- //\r
- // Terminate the whole device path\r
- //\r
- NextNode = NextDevicePathNode (NextNode);\r
- SetDevicePathEndNode (NextNode);\r
- }\r
- return NewDevicePath;\r
+ return UefiDevicePathLibAppendDevicePathNode (DevicePath, DevicePathNode);\r
}\r
\r
/**\r
- This function appends the device path instance Instance to the device path Source.\r
- If Source is NULL, then a new device path with one instance is created. \r
-\r
- @param Source A pointer to a device path data structure.\r
- @param Instance A pointer to a device path instance.\r
+ Creates a new device path by appending the specified device path instance to the specified device\r
+ path.\r
+ \r
+ This function creates a new device path by appending a copy of the device path \r
+ instance specified by DevicePathInstance to a copy of the device path specified \r
+ by DevicePath in a allocated buffer.\r
+ The end-of-device-path device node is moved after the end of the appended device \r
+ path instance and a new end-of-device-path-instance node is inserted between. \r
+ If DevicePath is NULL, then a copy if DevicePathInstance is returned.\r
+ If DevicePathInstance is NULL, then NULL is returned.\r
+ If DevicePath or DevicePathInstance is invalid, then NULL is returned.\r
+ If there is not enough memory to allocate space for the new device path, then \r
+ NULL is returned. \r
+ The memory is allocated from EFI boot services memory. It is the responsibility \r
+ of the caller to free the memory allocated.\r
+ \r
+ @param DevicePath A pointer to a device path data structure.\r
+ @param DevicePathInstance A pointer to a device path instance.\r
\r
@return A pointer to the new device path.\r
- If there is not enough temporary pool memory available to complete this function,\r
- then NULL is returned.\r
\r
**/\r
EFI_DEVICE_PATH_PROTOCOL *\r
EFIAPI\r
AppendDevicePathInstance (\r
- IN CONST EFI_DEVICE_PATH_PROTOCOL *Source,\r
- IN CONST EFI_DEVICE_PATH_PROTOCOL *Instance\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath, OPTIONAL\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathInstance OPTIONAL\r
)\r
{\r
- EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r
- EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r
- UINTN SrcSize;\r
- UINTN InstanceSize;\r
-\r
- if (Source == NULL) {\r
- return DuplicateDevicePath (Instance);\r
- }\r
-\r
- SrcSize = GetDevicePathSize (Source);\r
- InstanceSize = GetDevicePathSize (Instance);\r
-\r
- NewDevicePath = AllocatePool (SrcSize + InstanceSize);\r
- if (NewDevicePath != NULL) {\r
- \r
- DevicePath = CopyMem (NewDevicePath, Source, SrcSize);;\r
- \r
- while (!IsDevicePathEnd (DevicePath)) {\r
- DevicePath = NextDevicePathNode (DevicePath);\r
- }\r
- \r
- DevicePath->SubType = END_INSTANCE_DEVICE_PATH_SUBTYPE;\r
+ return UefiDevicePathLibAppendDevicePathInstance (DevicePath, DevicePathInstance);\r
+}\r
\r
- DevicePath = NextDevicePathNode (DevicePath);\r
- CopyMem (DevicePath, Instance, InstanceSize);\r
- }\r
+/**\r
+ Creates a copy of the current device path instance and returns a pointer to the next device path\r
+ instance.\r
+\r
+ This function creates a copy of the current device path instance. It also updates \r
+ DevicePath to point to the next device path instance in the device path (or NULL \r
+ if no more) and updates Size to hold the size of the device path instance copy.\r
+ If DevicePath is NULL, then NULL is returned.\r
+ If DevicePath points to a invalid device path, then NULL is returned.\r
+ If there is not enough memory to allocate space for the new device path, then \r
+ NULL is returned. \r
+ The memory is allocated from EFI boot services memory. It is the responsibility \r
+ of the caller to free the memory allocated.\r
+ If Size is NULL, then ASSERT().\r
+ \r
+ @param DevicePath On input, this holds the pointer to the current \r
+ device path instance. On output, this holds \r
+ the pointer to the next device path instance \r
+ or NULL if there are no more device path\r
+ instances in the device path pointer to a \r
+ device path data structure.\r
+ @param Size On output, this holds the size of the device \r
+ path instance, in bytes or zero, if DevicePath \r
+ is NULL.\r
+\r
+ @return A pointer to the current device path instance.\r
\r
- return NewDevicePath;\r
+**/\r
+EFI_DEVICE_PATH_PROTOCOL *\r
+EFIAPI\r
+GetNextDevicePathInstance (\r
+ IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath,\r
+ OUT UINTN *Size\r
+ )\r
+{\r
+ return UefiDevicePathLibGetNextDevicePathInstance (DevicePath, Size);\r
}\r
\r
/**\r
- Function retrieves the next device path instance from a device path data structure.\r
+ Creates a device node.\r
\r
- @param DevicePath A pointer to a device path data structure.\r
- \r
- @param Size A pointer to the size of a device path instance in bytes.\r
+ This function creates a new device node in a newly allocated buffer of size \r
+ NodeLength and initializes the device path node header with NodeType and NodeSubType. \r
+ The new device path node is returned.\r
+ If NodeLength is smaller than a device path header, then NULL is returned. \r
+ If there is not enough memory to allocate space for the new device path, then \r
+ NULL is returned. \r
+ The memory is allocated from EFI boot services memory. It is the responsibility \r
+ of the caller to free the memory allocated.\r
+\r
+ @param NodeType The device node type for the new device node.\r
+ @param NodeSubType The device node sub-type for the new device node.\r
+ @param NodeLength The length of the new device node.\r
\r
- @return This function returns a pointer to the current device path instance.\r
- In addition, it returns the size in bytes of the current device path instance in Size,\r
- and a pointer to the next device path instance in DevicePath.\r
- If there are no more device path instances in DevicePath, then DevicePath will be set to NULL.\r
+ @return The new device path.\r
\r
**/\r
EFI_DEVICE_PATH_PROTOCOL *\r
EFIAPI\r
-GetNextDevicePathInstance (\r
- IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath,\r
- OUT UINTN *Size\r
+CreateDeviceNode (\r
+ IN UINT8 NodeType,\r
+ IN UINT8 NodeSubType,\r
+ IN UINT16 NodeLength\r
)\r
{\r
- EFI_DEVICE_PATH_PROTOCOL *DevPath;\r
- EFI_DEVICE_PATH_PROTOCOL *ReturnValue;\r
- UINT8 Temp;\r
-\r
- ASSERT (DevicePath != NULL);\r
- ASSERT (Size != NULL);\r
- if (*DevicePath == NULL) {\r
- *Size = 0;\r
- return NULL;\r
- }\r
-\r
- //\r
- // Find the end of the device path instance\r
- //\r
- DevPath = *DevicePath;\r
- while (!IsDevicePathEndType (DevPath)) {\r
- DevPath = NextDevicePathNode (DevPath);\r
- }\r
-\r
- //\r
- // Compute the size of the device path instance\r
- //\r
- *Size = ((UINTN) DevPath - (UINTN) (*DevicePath)) + sizeof (EFI_DEVICE_PATH_PROTOCOL);\r
- \r
- //\r
- // Make a copy and return the device path instance\r
- //\r
- Temp = DevPath->SubType;\r
- DevPath->SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;\r
- ReturnValue = DuplicateDevicePath (*DevicePath);\r
- DevPath->SubType = Temp;\r
-\r
- //\r
- // If DevPath is the end of an entire device path, then another instance\r
- // does not follow, so *DevicePath is set to NULL.\r
- //\r
- if (DevicePathSubType (DevPath) == END_ENTIRE_DEVICE_PATH_SUBTYPE) {\r
- *DevicePath = NULL;\r
- } else {\r
- *DevicePath = NextDevicePathNode (DevPath);\r
- }\r
-\r
- return ReturnValue;\r
+ return UefiDevicePathLibCreateDeviceNode (NodeType, NodeSubType, NodeLength);\r
}\r
\r
/**\r
- Return TRUE is this is a multi instance device path.\r
+ Determines if a device path is single or multi-instance.\r
+\r
+ This function returns TRUE if the device path specified by DevicePath is\r
+ multi-instance.\r
+ Otherwise, FALSE is returned.\r
+ If DevicePath is NULL or invalid, then FALSE is returned.\r
\r
- @param DevicePath A pointer to a device path data structure.\r
+ @param DevicePath A pointer to a device path data structure.\r
\r
- @retval TRUE If DevicePath is multi-instance.\r
- @retval FALSE If DevicePath is not multi-instance or DevicePath is NULL.\r
+ @retval TRUE DevicePath is multi-instance.\r
+ @retval FALSE DevicePath is not multi-instance, or DevicePath \r
+ is NULL or invalid.\r
\r
**/\r
BOOLEAN\r
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath\r
)\r
{\r
- CONST EFI_DEVICE_PATH_PROTOCOL *Node;\r
+ return UefiDevicePathLibIsDevicePathMultiInstance (DevicePath);\r
+}\r
+\r
+/**\r
+ Converts a device node to its string representation.\r
+\r
+ @param DeviceNode A Pointer to the device node to be converted.\r
+ @param DisplayOnly If DisplayOnly is TRUE, then the shorter text representation\r
+ of the display node is used, where applicable. If DisplayOnly\r
+ is FALSE, then the longer text representation of the display node\r
+ is used.\r
+ @param AllowShortcuts If AllowShortcuts is TRUE, then the shortcut forms of text\r
+ representation for a device node can be used, where applicable.\r
+\r
+ @return A pointer to the allocated text representation of the device node or NULL if DeviceNode\r
+ is NULL or there was insufficient memory.\r
+\r
+**/\r
+CHAR16 *\r
+EFIAPI\r
+ConvertDeviceNodeToText (\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DeviceNode,\r
+ IN BOOLEAN DisplayOnly,\r
+ IN BOOLEAN AllowShortcuts\r
+ )\r
+{\r
+ return UefiDevicePathLibConvertDeviceNodeToText (DeviceNode, DisplayOnly, AllowShortcuts);\r
+}\r
\r
- if (DevicePath == NULL) {\r
- return FALSE;\r
- }\r
+/**\r
+ Converts a device path to its text representation.\r
\r
- Node = DevicePath;\r
- while (!EfiIsDevicePathEnd (Node)) {\r
- if (EfiIsDevicePathEndInstance (Node)) {\r
- return TRUE;\r
- }\r
+ @param DevicePath A Pointer to the device to be converted.\r
+ @param DisplayOnly If DisplayOnly is TRUE, then the shorter text representation\r
+ of the display node is used, where applicable. If DisplayOnly\r
+ is FALSE, then the longer text representation of the display node\r
+ is used.\r
+ @param AllowShortcuts If AllowShortcuts is TRUE, then the shortcut forms of text\r
+ representation for a device node can be used, where applicable.\r
\r
- Node = EfiNextDevicePathNode (Node);\r
- }\r
+ @return A pointer to the allocated text representation of the device path or\r
+ NULL if DeviceNode is NULL or there was insufficient memory.\r
\r
- return FALSE;\r
+**/\r
+CHAR16 *\r
+EFIAPI\r
+ConvertDevicePathToText (\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,\r
+ IN BOOLEAN DisplayOnly,\r
+ IN BOOLEAN AllowShortcuts\r
+ )\r
+{\r
+ return UefiDevicePathLibConvertDevicePathToText (DevicePath, DisplayOnly, AllowShortcuts);\r
}\r
\r
/**\r
- This function retrieves the device path protocol from a handle.\r
+ Convert text to the binary representation of a device node.\r
\r
- @param Handle The handle from which to retrieve the device path protocol.\r
+ @param TextDeviceNode TextDeviceNode points to the text representation of a device\r
+ node. Conversion starts with the first character and continues\r
+ until the first non-device node character.\r
\r
- @return This function returns the device path protocol from the handle specified by Handle.\r
- If Handle is NULL or Handle does not contain a device path protocol, then NULL is returned.\r
+ @return A pointer to the EFI device node or NULL if TextDeviceNode is NULL or there was\r
+ insufficient memory or text unsupported.\r
\r
**/\r
EFI_DEVICE_PATH_PROTOCOL *\r
EFIAPI\r
-DevicePathFromHandle (\r
- IN EFI_HANDLE Handle\r
+ConvertTextToDeviceNode (\r
+ IN CONST CHAR16 *TextDeviceNode\r
)\r
{\r
- EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r
- EFI_STATUS Status;\r
-\r
- Status = gBS->HandleProtocol (\r
- Handle,\r
- &gEfiDevicePathProtocolGuid,\r
- (VOID *) &DevicePath\r
- );\r
- if (EFI_ERROR (Status)) {\r
- DevicePath = NULL;\r
- }\r
- return DevicePath;\r
+ return UefiDevicePathLibConvertTextToDeviceNode (TextDeviceNode);\r
}\r
\r
/**\r
- This function allocates a device path for a file and appends it to an existing device path.\r
+ Convert text to the binary representation of a device path.\r
\r
- @param Device A pointer to a device handle. This parameter is optional and may be NULL.\r
- @param FileName A pointer to a Null-terminated Unicode string.\r
\r
- @return If Device is a valid device handle that contains a device path protocol,\r
- then a device path for the file specified by FileName is allocated\r
- and appended to the device path associated with the handle Device. The allocated device path is returned.\r
- If Device is NULL or Device is a handle that does not support the device path protocol,\r
- then a device path containing a single device path node for the file specified by FileName\r
- is allocated and returned.\r
+ @param TextDevicePath TextDevicePath points to the text representation of a device\r
+ path. Conversion starts with the first character and continues\r
+ until the first non-device node character.\r
+\r
+ @return A pointer to the allocated device path or NULL if TextDeviceNode is NULL or\r
+ there was insufficient memory.\r
\r
**/\r
EFI_DEVICE_PATH_PROTOCOL *\r
EFIAPI\r
-FileDevicePath (\r
- IN EFI_HANDLE Device, OPTIONAL\r
- IN CONST CHAR16 *FileName\r
+ConvertTextToDevicePath (\r
+ IN CONST CHAR16 *TextDevicePath\r
)\r
{\r
- UINTN FileNameSize;\r
- UINTN FilePathNodeSize;\r
- FILEPATH_DEVICE_PATH *FilePathNode;\r
- EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r
-\r
- DevicePath = NULL;\r
-\r
- FileNameSize = StrSize (FileName);\r
- FilePathNodeSize = FileNameSize + SIZE_OF_FILEPATH_DEVICE_PATH;\r
- FilePathNode = AllocatePool (FilePathNodeSize);\r
- if (FilePathNode != NULL) {\r
- //\r
- // Build a file path node\r
- //\r
- FilePathNode->Header.Type = MEDIA_DEVICE_PATH;\r
- FilePathNode->Header.SubType = MEDIA_FILEPATH_DP;\r
- SetDevicePathNodeLength (&FilePathNode->Header, FilePathNodeSize);\r
- CopyMem (FilePathNode->PathName, FileName, FileNameSize);\r
- \r
- //\r
- // Append file path node to device's device path\r
- //\r
- if (Device != NULL) {\r
- DevicePath = DevicePathFromHandle (Device);\r
- }\r
- DevicePath = AppendDevicePathNode (DevicePath, (EFI_DEVICE_PATH_PROTOCOL *) FilePathNode);\r
- FreePool (FilePathNode);\r
- }\r
- return DevicePath;\r
+ return UefiDevicePathLibConvertTextToDevicePath (TextDevicePath);\r
}\r
-\r
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