environment varibles. Multi-instance device paths should never be placed\r
on a Handle.\r
\r
- Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\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
**/\r
\r
\r
-#include <Uefi.h>\r
-\r
-#include <Library/DevicePathLib.h>\r
-#include <Library/BaseMemoryLib.h>\r
-#include <Library/DebugLib.h>\r
-#include <Library/MemoryAllocationLib.h>\r
-#include <Library/UefiBootServicesTableLib.h>\r
-#include <Library/BaseLib.h>\r
-\r
-//\r
-// Template for an end-of-device path node.\r
-//\r
-GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_DEVICE_PATH_PROTOCOL mUefiDevicePathLibEndDevicePath = {\r
- END_DEVICE_PATH_TYPE,\r
- END_ENTIRE_DEVICE_PATH_SUBTYPE,\r
- {\r
- END_DEVICE_PATH_LENGTH,\r
- 0\r
- }\r
-};\r
-\r
-/**\r
- Returns the Type field of a device path node.\r
-\r
- Returns the Type field of the device path node specified by Node.\r
-\r
- If Node is NULL, then ASSERT().\r
-\r
- @param Node A pointer to a device path node data structure.\r
-\r
- @return The Type field of the device path node specified by Node.\r
-\r
-**/\r
-UINT8\r
-EFIAPI\r
-DevicePathType (\r
- IN CONST VOID *Node\r
- )\r
-{\r
- ASSERT (Node != NULL);\r
- return ((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Type;\r
-}\r
-\r
-/**\r
- Returns the SubType field of a device path node.\r
-\r
- Returns the SubType field of the device path node specified by Node.\r
-\r
- If Node is NULL, then ASSERT().\r
-\r
- @param Node A pointer to a device path node data structure.\r
-\r
- @return The SubType field of the device path node specified by Node.\r
-\r
-**/\r
-UINT8\r
-EFIAPI\r
-DevicePathSubType (\r
- IN CONST VOID *Node\r
- )\r
-{\r
- ASSERT (Node != NULL);\r
- return ((EFI_DEVICE_PATH_PROTOCOL *)(Node))->SubType;\r
-}\r
-\r
-/**\r
- Returns the 16-bit Length field of a device path node.\r
-\r
- Returns the 16-bit Length field of the device path node specified by Node. \r
- Node is not required to be aligned on a 16-bit boundary, so it is recommended\r
- that a function such as ReadUnaligned16() be used to extract the contents of \r
- the Length field.\r
-\r
- If Node is NULL, then ASSERT().\r
-\r
- @param Node A pointer to a device path node data structure.\r
-\r
- @return The 16-bit Length field of the device path node specified by Node.\r
-\r
-**/\r
-UINTN\r
-EFIAPI\r
-DevicePathNodeLength (\r
- IN CONST VOID *Node\r
- )\r
-{\r
- ASSERT (Node != NULL);\r
- return ReadUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0]);\r
-}\r
-\r
-/**\r
- Returns a pointer to the next node in a device path.\r
-\r
- Returns a pointer to the device path node that follows the device path node \r
- specified by Node.\r
-\r
- If Node is NULL, then ASSERT().\r
-\r
- @param Node A pointer to a device path node data structure.\r
-\r
- @return a pointer to the device path node that follows the device path node \r
- specified by Node.\r
-\r
-**/\r
-EFI_DEVICE_PATH_PROTOCOL *\r
-EFIAPI\r
-NextDevicePathNode (\r
- IN CONST VOID *Node\r
- )\r
-{\r
- ASSERT (Node != NULL);\r
- return (EFI_DEVICE_PATH_PROTOCOL *)((UINT8 *)(Node) + DevicePathNodeLength(Node));\r
-}\r
-\r
-/**\r
- Determines if a device path node is an end node of a device path.\r
- This includes nodes that are the end of a device path instance and nodes that \r
- are the end of an entire device path.\r
-\r
- Determines if the device path node specified by Node is an end node of a device path. \r
- This includes nodes that are the end of a device path instance and nodes that are the \r
- end of an entire device path. If Node represents an end node of a device path, \r
- then TRUE is returned. Otherwise, FALSE is returned.\r
-\r
- If Node is NULL, then ASSERT().\r
-\r
- @param Node A pointer to a device path node data structure.\r
-\r
- @retval TRUE The device path node specified by Node is an end node of a \r
- device path.\r
- @retval FALSE The device path node specified by Node is not an end node of \r
- a device path.\r
- \r
-**/\r
-BOOLEAN\r
-EFIAPI\r
-IsDevicePathEndType (\r
- IN CONST VOID *Node\r
- )\r
-{\r
- ASSERT (Node != NULL);\r
- return (BOOLEAN) (DevicePathType (Node) == END_DEVICE_PATH_TYPE);\r
-}\r
-\r
-/**\r
- Determines if a device path node is an end node of an entire device path.\r
-\r
- Determines if a device path node specified by Node is an end node of an entire \r
- device path. If Node represents the end of an entire device path, then TRUE is \r
- returned. Otherwise, FALSE is returned.\r
-\r
- If Node is NULL, then ASSERT().\r
-\r
- @param Node A pointer to a device path node data structure.\r
-\r
- @retval TRUE The device path node specified by Node is the end of an entire \r
- device path.\r
- @retval FALSE The device path node specified by Node is not the end of an \r
- entire device path.\r
-\r
-**/\r
-BOOLEAN\r
-EFIAPI\r
-IsDevicePathEnd (\r
- IN CONST VOID *Node\r
- )\r
-{\r
- ASSERT (Node != NULL);\r
- return (BOOLEAN) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_ENTIRE_DEVICE_PATH_SUBTYPE);\r
-}\r
-\r
-/**\r
- Determines if a device path node is an end node of a device path instance.\r
-\r
- Determines if a device path node specified by Node is an end node of a device \r
- path instance. If Node represents the end of a device path instance, then TRUE \r
- is returned. Otherwise, FALSE is returned.\r
-\r
- If Node is NULL, then ASSERT().\r
-\r
- @param Node A pointer to a device path node data structure.\r
-\r
- @retval TRUE The device path node specified by Node is the end of a device \r
- path instance.\r
- @retval FALSE The device path node specified by Node is not the end of a \r
- device path instance.\r
-\r
-**/\r
-BOOLEAN\r
-EFIAPI\r
-IsDevicePathEndInstance (\r
- IN CONST VOID *Node\r
- )\r
-{\r
- ASSERT (Node != NULL);\r
- return (BOOLEAN) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_INSTANCE_DEVICE_PATH_SUBTYPE);\r
-}\r
-\r
-/**\r
- Sets the length, in bytes, of a device path node.\r
-\r
- Sets the length of the device path node specified by Node to the value specified \r
- by NodeLength. NodeLength is returned. Node is not required to be aligned on \r
- a 16-bit boundary, so it is recommended that a function such as WriteUnaligned16()\r
- be used to set the contents of the Length field.\r
-\r
- If Node is NULL, then ASSERT().\r
- If NodeLength >= 0x10000, then ASSERT().\r
-\r
- @param Node A pointer to a device path node data structure.\r
- @param Length The length, in bytes, of the device path node.\r
-\r
- @return Length\r
-\r
-**/\r
-UINT16\r
-EFIAPI\r
-SetDevicePathNodeLength (\r
- IN OUT VOID *Node,\r
- IN UINTN Length\r
- )\r
-{\r
- ASSERT (Node != NULL);\r
- ASSERT (Length < 0x10000);\r
- return WriteUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0], (UINT16)(Length));\r
-}\r
-\r
-/**\r
- Fills in all the fields of a device path node that is the end of an entire device path.\r
-\r
- Fills in all the fields of a device path node specified by Node so Node represents \r
- the end of an entire device path. The Type field of Node is set to \r
- END_DEVICE_PATH_TYPE, the SubType field of Node is set to \r
- END_ENTIRE_DEVICE_PATH_SUBTYPE, and the Length field of Node is set to \r
- END_DEVICE_PATH_LENGTH. Node is not required to be aligned on a 16-bit boundary, \r
- so it is recommended that a function such as WriteUnaligned16() be used to set \r
- the contents of the Length field. \r
-\r
- If Node is NULL, then ASSERT(). \r
-\r
- @param Node A pointer to a device path node data structure.\r
-\r
-**/\r
-VOID\r
-EFIAPI\r
-SetDevicePathEndNode (\r
- OUT VOID *Node\r
- )\r
-{\r
- ASSERT (Node != NULL);\r
- CopyMem (Node, &mUefiDevicePathLibEndDevicePath, sizeof (mUefiDevicePathLibEndDevicePath));\r
-}\r
+#include "UefiDevicePathLib.h"\r
\r
/**\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. If DevicePath \r
- is NULL, then 0 is returned.\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
- \r
- @retval 0 If DevicePath is NULL.\r
+\r
+ @retval 0 If DevicePath is NULL or invalid.\r
@retval Others The size of a device path in bytes.\r
\r
**/\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 (!IsDevicePathEnd (DevicePath)) {\r
- DevicePath = NextDevicePathNode (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) + DevicePathNodeLength (DevicePath);\r
+ return UefiDevicePathLibGetDevicePathSize (DevicePath);\r
}\r
\r
/**\r
\r
@param DevicePath A pointer to a device path data structure.\r
\r
- @retval NULL If DevicePath is NULL.\r
+ @retval NULL DevicePath is NULL or invalid.\r
@retval Others A pointer to the duplicated device path.\r
\r
**/\r
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath\r
)\r
{\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
-\r
- return AllocateCopyPool (Size, DevicePath);\r
+ return UefiDevicePathLibDuplicateDevicePath (DevicePath);\r
}\r
\r
/**\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
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 != NULL) ? SecondDevicePath : &mUefiDevicePathLibEndDevicePath);\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 - END_DEVICE_PATH_LENGTH;\r
-\r
- NewDevicePath = AllocatePool (Size);\r
-\r
- if (NewDevicePath != NULL) {\r
- NewDevicePath = CopyMem (NewDevicePath, FirstDevicePath, Size1);\r
- //\r
- // Over write FirstDevicePath EndNode and do the copy\r
- //\r
- DevicePath2 = (EFI_DEVICE_PATH_PROTOCOL *) ((CHAR8 *) NewDevicePath +\r
- (Size1 - END_DEVICE_PATH_LENGTH));\r
- CopyMem (DevicePath2, SecondDevicePath, Size2);\r
- }\r
-\r
- return NewDevicePath;\r
+ return UefiDevicePathLibAppendDevicePath (FirstDevicePath, SecondDevicePath);\r
}\r
\r
/**\r
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathNode OPTIONAL\r
)\r
{\r
- EFI_DEVICE_PATH_PROTOCOL *TempDevicePath;\r
- EFI_DEVICE_PATH_PROTOCOL *NextNode;\r
- EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r
- UINTN NodeLength;\r
-\r
- if (DevicePathNode == NULL) {\r
- return DuplicateDevicePath ((DevicePath != NULL) ? DevicePath : &mUefiDevicePathLibEndDevicePath);\r
- }\r
- //\r
- // Build a Node that has a terminator on it\r
- //\r
- NodeLength = DevicePathNodeLength (DevicePathNode);\r
-\r
- TempDevicePath = AllocatePool (NodeLength + END_DEVICE_PATH_LENGTH);\r
- if (TempDevicePath == NULL) {\r
- return NULL;\r
- }\r
- TempDevicePath = CopyMem (TempDevicePath, DevicePathNode, NodeLength);\r
- //\r
- // Add and end device path node to convert Node to device path\r
- //\r
- NextNode = NextDevicePathNode (TempDevicePath);\r
- SetDevicePathEndNode (NextNode);\r
- //\r
- // Append device paths\r
- //\r
- NewDevicePath = AppendDevicePath (DevicePath, TempDevicePath);\r
-\r
- FreePool (TempDevicePath);\r
-\r
- return NewDevicePath;\r
+ return UefiDevicePathLibAppendDevicePathNode (DevicePath, DevicePathNode);\r
}\r
\r
/**\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
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathInstance OPTIONAL\r
)\r
{\r
- EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r
- EFI_DEVICE_PATH_PROTOCOL *TempDevicePath;\r
- UINTN SrcSize;\r
- UINTN InstanceSize;\r
-\r
- if (DevicePath == NULL) {\r
- return DuplicateDevicePath (DevicePathInstance);\r
- }\r
-\r
- if (DevicePathInstance == NULL) {\r
- return NULL;\r
- }\r
-\r
- SrcSize = GetDevicePathSize (DevicePath);\r
- InstanceSize = GetDevicePathSize (DevicePathInstance);\r
-\r
- NewDevicePath = AllocatePool (SrcSize + InstanceSize);\r
- if (NewDevicePath != NULL) {\r
- \r
- TempDevicePath = CopyMem (NewDevicePath, DevicePath, SrcSize);;\r
- \r
- while (!IsDevicePathEnd (TempDevicePath)) {\r
- TempDevicePath = NextDevicePathNode (TempDevicePath);\r
- }\r
- \r
- TempDevicePath->SubType = END_INSTANCE_DEVICE_PATH_SUBTYPE;\r
- TempDevicePath = NextDevicePathNode (TempDevicePath);\r
- CopyMem (TempDevicePath, DevicePathInstance, InstanceSize);\r
- }\r
-\r
- return NewDevicePath;\r
+ return UefiDevicePathLibAppendDevicePathInstance (DevicePath, DevicePathInstance);\r
}\r
\r
/**\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
OUT UINTN *Size\r
)\r
{\r
- EFI_DEVICE_PATH_PROTOCOL *DevPath;\r
- EFI_DEVICE_PATH_PROTOCOL *ReturnValue;\r
- UINT8 Temp;\r
-\r
- ASSERT (Size != NULL);\r
-\r
- if (DevicePath == NULL || *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 UefiDevicePathLibGetNextDevicePathInstance (DevicePath, Size);\r
}\r
\r
/**\r
IN UINT16 NodeLength\r
)\r
{\r
- EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r
-\r
- if (NodeLength < sizeof (EFI_DEVICE_PATH_PROTOCOL)) {\r
- //\r
- // NodeLength is less than the size of the header.\r
- //\r
- return NULL;\r
- }\r
- \r
- DevicePath = AllocateZeroPool (NodeLength);\r
- if (DevicePath != NULL) {\r
- DevicePath->Type = NodeType;\r
- DevicePath->SubType = NodeSubType;\r
- SetDevicePathNodeLength (DevicePath, NodeLength);\r
- }\r
-\r
- return DevicePath;\r
+ return UefiDevicePathLibCreateDeviceNode (NodeType, NodeSubType, NodeLength);\r
}\r
\r
/**\r
\r
This function returns TRUE if the device path specified by DevicePath is\r
multi-instance.\r
- Otherwise, FALSE is returned. If DevicePath is NULL, then FALSE is returned.\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
\r
@retval TRUE DevicePath is multi-instance.\r
- @retval FALSE DevicePath is not multi-instance or DevicePath \r
- is NULL.\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
- if (DevicePath == NULL) {\r
- return FALSE;\r
- }\r
+/**\r
+ Converts a device node to its string representation.\r
\r
- Node = DevicePath;\r
- while (!IsDevicePathEnd (Node)) {\r
- if (IsDevicePathEndInstance (Node)) {\r
- return TRUE;\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
- Node = NextDevicePathNode (Node);\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
- return FALSE;\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
-\r
/**\r
- Retrieves the device path protocol from a handle.\r
+ Converts a device path to its text representation.\r
\r
- 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 \r
- is returned.\r
- \r
- @param Handle The handle from which to retrieve the device \r
- path protocol.\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
- @return The device path protocol from the handle specified by Handle.\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
**/\r
-EFI_DEVICE_PATH_PROTOCOL *\r
+CHAR16 *\r
EFIAPI\r
-DevicePathFromHandle (\r
- IN EFI_HANDLE Handle\r
+ConvertDevicePathToText (\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,\r
+ IN BOOLEAN DisplayOnly,\r
+ IN BOOLEAN AllowShortcuts\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 UefiDevicePathLibConvertDevicePathToText (DevicePath, DisplayOnly, AllowShortcuts);\r
}\r
\r
/**\r
- Allocates a device path for a file and appends it to an existing device path.\r
-\r
- If Device is a valid device handle that contains a device path protocol, then a device path for\r
- the file specified by FileName is allocated and appended to the device path associated with the\r
- handle Device. The allocated device path is returned. If Device is NULL or Device is a handle\r
- that does not support the device path protocol, then a device path containing a single device\r
- path node for the file specified by FileName is allocated and returned.\r
- The memory for the new device path is allocated from EFI boot services memory. It is the responsibility\r
- of the caller to free the memory allocated.\r
- \r
- If FileName is NULL, then ASSERT().\r
- If FileName is not aligned on a 16-bit boundary, then ASSERT().\r
+ Convert text to the binary representation of a device node.\r
\r
- @param Device A pointer to a device handle. This parameter \r
- is optional and may be NULL.\r
- @param FileName A pointer to a Null-terminated Unicode string.\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 The allocated device path.\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
-FileDevicePath (\r
- IN EFI_HANDLE Device, OPTIONAL\r
- IN CONST CHAR16 *FileName\r
+ConvertTextToDeviceNode (\r
+ IN CONST CHAR16 *TextDeviceNode\r
)\r
{\r
- UINT16 Size;\r
- FILEPATH_DEVICE_PATH *FilePath;\r
- EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r
- EFI_DEVICE_PATH_PROTOCOL *FileDevicePath;\r
+ return UefiDevicePathLibConvertTextToDeviceNode (TextDeviceNode);\r
+}\r
\r
- DevicePath = NULL;\r
+/**\r
+ Convert text to the binary representation of a device path.\r
\r
- Size = (UINT16) StrSize (FileName);\r
- \r
- FileDevicePath = AllocatePool (Size + SIZE_OF_FILEPATH_DEVICE_PATH + END_DEVICE_PATH_LENGTH);\r
- if (FileDevicePath != NULL) {\r
- FilePath = (FILEPATH_DEVICE_PATH *) FileDevicePath;\r
- FilePath->Header.Type = MEDIA_DEVICE_PATH;\r
- FilePath->Header.SubType = MEDIA_FILEPATH_DP;\r
- CopyMem (&FilePath->PathName, FileName, Size);\r
- SetDevicePathNodeLength (&FilePath->Header, Size + SIZE_OF_FILEPATH_DEVICE_PATH);\r
- SetDevicePathEndNode (NextDevicePathNode (&FilePath->Header));\r
-\r
- if (Device != NULL) {\r
- DevicePath = DevicePathFromHandle (Device);\r
- }\r
-\r
- DevicePath = AppendDevicePath (DevicePath, FileDevicePath);\r
- FreePool (FileDevicePath);\r
- }\r
-\r
- return DevicePath;\r
-}\r
\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
+ConvertTextToDevicePath (\r
+ IN CONST CHAR16 *TextDevicePath\r
+ )\r
+{\r
+ return UefiDevicePathLibConvertTextToDevicePath (TextDevicePath);\r
+}\r
projects / mirror_edk2.git / blobdiff