--- /dev/null
+/*++\r
+\r
+Copyright (c) 2006, Intel Corporation \r
+All rights reserved. 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
+ \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:\r
+\r
+ DevicePathUtilities.c\r
+\r
+Abstract:\r
+\r
+ Implementation file for Device Path Utilities Protocol\r
+\r
+--*/\r
+\r
+//\r
+// Include common header file for this module.\r
+//\r
+#include "CommonHeader.h"\r
+\r
+#include "DevicePath.h"\r
+\r
+UINTN\r
+GetDevicePathSizeProtocolInterface (\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath\r
+ )\r
+/*++\r
+\r
+ Routine Description:\r
+ Returns the size of the device path, in bytes.\r
+\r
+ Arguments:\r
+ DevicePath - Points to the start of the EFI device path.\r
+\r
+ Returns:\r
+ Size - Size of the specified device path, in bytes, including the end-of-path tag.\r
+\r
+--*/\r
+{\r
+ return GetDevicePathSize (DevicePath);\r
+}\r
+\r
+EFI_DEVICE_PATH_PROTOCOL *\r
+DuplicateDevicePathProtocolInterface (\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath\r
+ )\r
+/*++\r
+\r
+ Routine Description:\r
+ Create a duplicate of the specified path.\r
+\r
+ Arguments:\r
+ DevicePath - Points to the source EFI device path.\r
+\r
+ Returns:\r
+ Pointer - A pointer to the duplicate device path.\r
+ NULL - Insufficient memory.\r
+\r
+--*/\r
+{\r
+ return DuplicateDevicePath (DevicePath);\r
+}\r
+\r
+EFI_DEVICE_PATH_PROTOCOL *\r
+AppendDevicePathProtocolInterface (\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *Src1,\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *Src2\r
+ )\r
+/*++\r
+\r
+ Routine Description:\r
+ Create a new path by appending the second device path to the first.\r
+\r
+ Arguments:\r
+ Src1 - Points to the first device path. If NULL, then it is ignored.\r
+ Src2 - Points to the second device path. If NULL, then it is ignored.\r
+\r
+ Returns:\r
+ Pointer - A pointer to the newly created device path.\r
+ NULL - Memory could not be allocated\r
+ or either DevicePath or DeviceNode is NULL.\r
+\r
+--*/\r
+{\r
+ return AppendDevicePath (Src1, Src2);\r
+}\r
+\r
+EFI_DEVICE_PATH_PROTOCOL *\r
+AppendDeviceNodeProtocolInterface (\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DeviceNode\r
+ )\r
+/*++\r
+\r
+ Routine Description:\r
+ Creates a new path by appending the device node to the device path.\r
+\r
+ Arguments:\r
+ DevicePath - Points to the device path.\r
+ DeviceNode - Points to the device node.\r
+\r
+ Returns:\r
+ Pointer - A pointer to the allocated device node.\r
+ NULL - Memory could not be allocated\r
+ or either DevicePath or DeviceNode is NULL.\r
+\r
+--*/\r
+{\r
+ return AppendDevicePathNode (DevicePath, DeviceNode);\r
+}\r
+\r
+EFI_DEVICE_PATH_PROTOCOL *\r
+AppendDevicePathInstanceProtocolInterface (\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathInstance\r
+ )\r
+/*++\r
+\r
+ Routine Description:\r
+ Creates a new path by appending the specified device path instance to the specified device path.\r
+\r
+ Arguments:\r
+ DevicePath - Points to the device path. If NULL, then ignored.\r
+ DevicePathInstance - Points to the device path instance.\r
+\r
+ Returns:\r
+ Pointer - A pointer to the newly created device path\r
+ NULL - Memory could not be allocated or DevicePathInstance is NULL.\r
+\r
+--*/\r
+{\r
+ return AppendDevicePathInstance (DevicePath, DevicePathInstance);\r
+}\r
+\r
+EFI_DEVICE_PATH_PROTOCOL *\r
+GetNextDevicePathInstanceProtocolInterface (\r
+ IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePathInstance,\r
+ OUT UINTN *DevicePathInstanceSize\r
+ )\r
+/*++\r
+\r
+ Routine Description:\r
+ Creates a copy of the current device path instance and returns a pointer to the next device path instance.\r
+\r
+ Arguments:\r
+ DevicePathInstance - On input, this holds the pointer to the current device path\r
+ instance. On output, this holds the pointer to the next\r
+ device path instance or NULL if there are no more device\r
+ path instances in the device path.\r
+ DevicePathInstanceSize - On output, this holds the size of the device path instance,\r
+ in bytes or zero, if DevicePathInstance is zero.\r
+\r
+ Returns:\r
+ Pointer - A pointer to the copy of the current device path instance.\r
+ NULL - DevicePathInstace was NULL on entry or there was insufficient memory.\r
+\r
+--*/\r
+{\r
+ return GetNextDevicePathInstance (DevicePathInstance, DevicePathInstanceSize);\r
+}\r
+\r
+BOOLEAN\r
+IsDevicePathMultiInstanceProtocolInterface (\r
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath\r
+ )\r
+/*++\r
+\r
+ Routine Description:\r
+ Returns whether a device path is multi-instance.\r
+\r
+ Arguments:\r
+ DevicePath - Points to the device path. If NULL, then ignored.\r
+\r
+ Returns:\r
+ TRUE - The device path has more than one instance\r
+ FALSE - The device path is empty or contains only a single instance.\r
+\r
+--*/\r
+{\r
+ return IsDevicePathMultiInstance (DevicePath);\r
+}\r
+\r
+EFI_DEVICE_PATH_PROTOCOL *\r
+CreateDeviceNodeProtocolInterface (\r
+ IN UINT8 NodeType,\r
+ IN UINT8 NodeSubType,\r
+ IN UINT16 NodeLength\r
+ )\r
+/*++\r
+\r
+ Routine Description:\r
+ Creates a device node\r
+\r
+ Arguments:\r
+ NodeType - NodeType is the device node type (EFI_DEVICE_PATH.Type) for\r
+ the new device node.\r
+ NodeSubType - NodeSubType is the device node sub-type\r
+ EFI_DEVICE_PATH.SubType) for the new device node.\r
+ NodeLength - NodeLength is the length of the device node\r
+ (EFI_DEVICE_PATH.Length) for the new device node.\r
+\r
+ Returns:\r
+ Pointer - A pointer to the newly created device node.\r
+ NULL - NodeLength is less than\r
+ the size of the header or there was insufficient memory.\r
+\r
+--*/\r
+{\r
+ return CreateDeviceNode (NodeType, NodeSubType, NodeLength);\r
+}\r
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