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Update DevicePathLib to reflect the update of UEFI device utility protocol 

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3914 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
qhuang8 2007-09-24 06:54:04 +00:00
parent a0b4ea2aec
commit 98a14db6f2
3 changed files with 32 additions and 13 deletions
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11
MdePkg/Include/Library/DevicePathLib.h
View File

@ -1,5 +1,5 @@
/** @file
Entry point to a DXE Boot Services Driver
Device Path services.
Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
@ -59,7 +59,8 @@ DuplicateDevicePath (
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 NULL 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.
@ -83,8 +84,10 @@ AppendDevicePath (
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 DevicePath is NULL, then NULL is returned.
If DevicePathNode is NULL, then NULL is returned.
If DeviceNode is NULL then a copy of DevicePath is returned.
If DevicePathNode is NULL then a copy of DevicePath 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.

25
MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.c
View File

@ -31,6 +31,16 @@
#include <Library/UefiBootServicesTableLib.h>
#include <Library/BaseLib.h>
//
// Template for an end-of-device path node.
//
STATIC EFI_DEVICE_PATH_PROTOCOL mEndDevicePath[] = {
END_DEVICE_PATH_TYPE,
END_ENTIRE_DEVICE_PATH_SUBTYPE,
END_DEVICE_PATH_LENGTH,
0
};
/**
Returns the size of a device path in bytes.
@ -114,7 +124,8 @@ DuplicateDevicePath (
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 NULL 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.
@ -142,7 +153,7 @@ AppendDevicePath (
// If there's only 1 path, just duplicate it.
//
if (FirstDevicePath == NULL) {
return DuplicateDevicePath (SecondDevicePath);
return DuplicateDevicePath ((SecondDevicePath != NULL) ? SecondDevicePath : mEndDevicePath);
}
if (SecondDevicePath == NULL) {
@ -178,8 +189,10 @@ AppendDevicePath (
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 DevicePath is NULL, then NULL is returned.
If DevicePathNode is NULL, then NULL is returned.
If DeviceNode is NULL then a copy of DevicePath is returned.
If DevicePathNode is NULL then a copy of DevicePath 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.
@ -202,8 +215,8 @@ AppendDevicePathNode (
EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;
UINTN NodeLength;
if (DevicePath == NULL || DevicePathNode == NULL) {
return NULL;
if (DevicePathNode == NULL) {
return DuplicateDevicePath ((DevicePath != NULL) ? DevicePath : mEndDevicePath);
}
//
// Build a Node that has a terminator on it

9
MdePkg/Library/UefiDevicePathLibDevicePathProtocol/UefiDevicePathLib.c
View File

@ -111,7 +111,8 @@ DuplicateDevicePath (
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 NULL 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.
@ -138,8 +139,10 @@ AppendDevicePath (
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 DevicePath is NULL, then NULL is returned.
If DevicePathNode is NULL, then NULL is returned.
If DeviceNode is NULL then a copy of DevicePath is returned.
If DevicePathNode is NULL then a copy of DevicePath 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.