diff options
| author | jcarsey <jcarsey@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-11-09 23:33:11 +0000 |
|---|---|---|
| committer | jcarsey <jcarsey@6f19259b-4bc3-4df7-8a09-765794883524> | 2009-11-09 23:33:11 +0000 |
| commit | a4ee2a4f9296f00dbda066817b5bdba4f437097e (patch) | |
| tree | f29c71d33a2f34997b39f9be44e4704840cb0a70 /ShellPkg | |
| parent | 2247dde4b69779fc55c23aeb06130b7296ae7401 (diff) | |
| download | edk2-platforms-a4ee2a4f9296f00dbda066817b5bdba4f437097e.tar.xz | |
Adding new library instance for SortLib with built in function for sorting device paths.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9399 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ShellPkg')
| -rw-r--r-- | ShellPkg/Library/UefiSortLib/UefiSortLib.c | 254 | ||||
| -rw-r--r-- | ShellPkg/Library/UefiSortLib/UefiSortLib.inf | 49 |
2 files changed, 303 insertions, 0 deletions
diff --git a/ShellPkg/Library/UefiSortLib/UefiSortLib.c b/ShellPkg/Library/UefiSortLib/UefiSortLib.c new file mode 100644 index 0000000000..e7a8d1e952 --- /dev/null +++ b/ShellPkg/Library/UefiSortLib/UefiSortLib.c @@ -0,0 +1,254 @@ +/** @file
+ Library used for sorting routines.
+
+Copyright (c) 2009, Intel Corporation
+All rights reserved. This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Uefi.h>
+
+#include <Protocol/UnicodeCollation.h>
+#include <Protocol/DevicePath.h>
+#include <Protocol/DevicePathToText.h>
+
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/SortLib.h>
+
+/**
+ Worker function for QuickSorting. This function is identical to PerformQuickSort,
+ except that is uses the pre-allocated buffer so the in place sorting does not need to
+ allocate and free buffers constantly.
+
+ Each element must be equal sized.
+
+ if BufferToSort is NULL, then ASSERT.
+ if CompareFunction is NULL, then ASSERT.
+ if Buffer is NULL, then ASSERT.
+
+ if Count is < 2 then perform no action.
+ if Size is < 1 then perform no action.
+
+ @param[in,out] BufferToSort on call a Buffer of (possibly sorted) elements
+ on return a buffer of sorted elements
+ @param[in] Count the number of elements in the buffer to sort
+ @param[in] ElementSize Size of an element in bytes
+ @param[in] CompareFunction The function to call to perform the comparison
+ of any 2 elements
+ @param[in] Buffer Buffer of size ElementSize for use in swapping
+**/
+VOID
+EFIAPI
+QuickSortWorker (
+ IN OUT VOID *BufferToSort,
+ IN CONST UINTN Count,
+ IN CONST UINTN ElementSize,
+ IN SORT_COMPARE CompareFunction,
+ IN VOID *Buffer
+ ){
+ VOID *Pivot;
+ UINTN LoopCount;
+ UINTN NextSwapLocation;
+
+ ASSERT(BufferToSort != NULL);
+ ASSERT(CompareFunction != NULL);
+ ASSERT(Buffer != NULL);
+
+ if ( Count < 2
+ || ElementSize < 1
+ ){
+ return;
+ }
+
+ NextSwapLocation = 0;
+
+ //
+ // pick a pivot (we choose last element)
+ //
+ Pivot = ((UINT8*)BufferToSort+((Count-1)*ElementSize));
+
+ //
+ // Now get the pivot such that all on "left" are below it
+ // and everything "right" are above it
+ //
+ for ( LoopCount = 0
+ ; LoopCount < Count -1
+ ; LoopCount++
+ ){
+ //
+ // if the element is less than the pivot
+ //
+ if (CompareFunction((VOID*)((UINT8*)BufferToSort+((LoopCount)*ElementSize)),Pivot) <= 0){
+ //
+ // swap
+ //
+ CopyMem (Buffer, (UINT8*)BufferToSort+(NextSwapLocation*ElementSize), ElementSize);
+ CopyMem ((UINT8*)BufferToSort+(NextSwapLocation*ElementSize), (UINT8*)BufferToSort+((LoopCount)*ElementSize), ElementSize);
+ CopyMem ((UINT8*)BufferToSort+((LoopCount)*ElementSize), Buffer, ElementSize);
+
+ //
+ // increment NextSwapLocation
+ //
+ NextSwapLocation++;
+ }
+ }
+ //
+ // swap pivot to it's final position (NextSwapLocaiton)
+ //
+ CopyMem (Buffer, Pivot, ElementSize);
+ CopyMem (Pivot, (UINT8*)BufferToSort+(NextSwapLocation*ElementSize), ElementSize);
+ CopyMem ((UINT8*)BufferToSort+(NextSwapLocation*ElementSize), Buffer, ElementSize);
+
+ //
+ // Now recurse on 2 paritial lists. neither of these will have the 'pivot' element
+ // IE list is sorted left half, pivot element, sorted right half...
+ //
+ QuickSortWorker(
+ BufferToSort,
+ NextSwapLocation,
+ ElementSize,
+ CompareFunction,
+ Buffer);
+
+ QuickSortWorker(
+ (UINT8 *)BufferToSort + (NextSwapLocation+1) * ElementSize,
+ Count - NextSwapLocation - 1,
+ ElementSize,
+ CompareFunction,
+ Buffer);
+
+ return;
+}
+/**
+ Function to perform a Quick Sort alogrithm on a buffer of comparable elements.
+
+ Each element must be equal sized.
+
+ if BufferToSort is NULL, then ASSERT.
+ if CompareFunction is NULL, then ASSERT.
+
+ if Count is < 2 then perform no action.
+ if Size is < 1 then perform no action.
+
+ @param[in,out] BufferToSort on call a Buffer of (possibly sorted) elements
+ on return a buffer of sorted elements
+ @param[in] Count the number of elements in the buffer to sort
+ @param[in] ElementSize Size of an element in bytes
+ @param[in] CompareFunction The function to call to perform the comparison
+ of any 2 elements
+**/
+VOID
+EFIAPI
+PerformQuickSort (
+ IN OUT VOID *BufferToSort,
+ IN CONST UINTN Count,
+ IN CONST UINTN ElementSize,
+ IN SORT_COMPARE CompareFunction
+ ){
+ VOID *Buffer;
+
+ ASSERT(BufferToSort != NULL);
+ ASSERT(CompareFunction != NULL);
+
+ Buffer = AllocatePool(ElementSize);
+ ASSERT(Buffer != NULL);
+
+ QuickSortWorker(
+ BufferToSort,
+ Count,
+ ElementSize,
+ CompareFunction,
+ Buffer);
+
+ FreePool(Buffer);
+ return;
+}
+
+/**
+ function to compare 2 device paths for use in QuickSort
+
+ @param[in] Buffer1 pointer to Device Path poiner to compare
+ @param[in] Buffer2 pointer to second DevicePath pointer to compare
+
+ @retval 0 Buffer1 equal to Buffer2
+ @return < 0 Buffer1 is less than Buffer2
+ @return > 0 Buffer1 is greater than Buffer2
+**/
+INTN
+DevicePathCompare (
+ IN VOID *Buffer1,
+ IN VOID *Buffer2
+ ){
+ EFI_DEVICE_PATH_PROTOCOL *DevicePath1;
+ EFI_DEVICE_PATH_PROTOCOL *DevicePath2;
+ CHAR16 *TextPath1;
+ CHAR16 *TextPath2;
+ EFI_STATUS Status;
+ INTN RetVal;
+
+ STATIC EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *DevicePathToText = NULL;
+ STATIC EFI_UNICODE_COLLATION_PROTOCOL *UnicodeCollation = NULL;
+
+ DevicePath1 = *(EFI_DEVICE_PATH_PROTOCOL**)Buffer1;
+ DevicePath2 = *(EFI_DEVICE_PATH_PROTOCOL**)Buffer2;
+
+ if (DevicePath1 == NULL) {
+ if (DevicePath2 == NULL) {
+ return 0;
+ }
+
+ return -1;
+ }
+
+ if (DevicePath2 == NULL) {
+ return 1;
+ }
+
+ if (DevicePathToText == NULL) {
+ Status = gBS->LocateProtocol(
+ &gEfiDevicePathToTextProtocolGuid,
+ NULL,
+ (VOID**)&DevicePathToText);
+
+ ASSERT_EFI_ERROR(Status);
+ }
+
+ if (UnicodeCollation == NULL) {
+ Status = gBS->LocateProtocol(
+ &gEfiUnicodeCollation2ProtocolGuid,
+ NULL,
+ (VOID**)&UnicodeCollation);
+
+ ASSERT_EFI_ERROR(Status);
+ }
+
+ TextPath1 = DevicePathToText->ConvertDevicePathToText(
+ DevicePath1,
+ FALSE,
+ FALSE);
+
+ TextPath2 = DevicePathToText->ConvertDevicePathToText(
+ DevicePath2,
+ FALSE,
+ FALSE);
+
+ RetVal = UnicodeCollation->StriColl(
+ UnicodeCollation,
+ TextPath1,
+ TextPath2);
+
+ FreePool(TextPath1);
+ FreePool(TextPath2);
+
+ return (RetVal);
+}
\ No newline at end of file diff --git a/ShellPkg/Library/UefiSortLib/UefiSortLib.inf b/ShellPkg/Library/UefiSortLib/UefiSortLib.inf new file mode 100644 index 0000000000..a93c42dab0 --- /dev/null +++ b/ShellPkg/Library/UefiSortLib/UefiSortLib.inf @@ -0,0 +1,49 @@ +#/** @file
+# Library used for sorting routines.
+#
+# Copyright (c) 2009, Intel Corporation.
+#
+# All rights reserved. This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010006
+ BASE_NAME = UefiSortLib
+ FILE_GUID = 4264A823-45A3-42db-B92C-AA078555CBD3
+ MODULE_TYPE = UEFI_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = SORTLib|UEFI_APPLICATION UEFI_DRIVER
+
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF EBC
+#
+
+[Sources.common]
+ UefiSortLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ ShellPkg/ShellPkg.dec
+
+[LibraryClasses]
+ MemoryAllocationLib
+ BaseLib
+ BaseMemoryLib
+ DebugLib
+ UefiBootServicesTableLib
+
+[Protocols]
+ gEfiUnicodeCollation2ProtocolGuid # ALWAYS_CONSUMED
+ gEfiDevicePathProtocolGuid # ALWAYS_CONSUMED
+ gEfiDevicePathToTextProtocolGuid # ALWAYS_CONSUMED
+
+[Guids]
+
+[Pcd.common]
|