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/** @file
Library used for sorting routines.
Copyright (c) 2009 - 2021, Intel Corporation. All rights reserved. <BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi.h>
#include <Protocol/UnicodeCollation.h>
#include <Protocol/DevicePath.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>
#include <Library/DevicePathLib.h>
STATIC EFI_UNICODE_COLLATION_PROTOCOL *mUnicodeCollation = NULL;
#define USL_FREE_NON_NULL(Pointer) \
{ \
if ((Pointer) != NULL) { \
FreePool((Pointer)); \
(Pointer) = NULL; \
} \
}
/**
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 = AllocateZeroPool (ElementSize);
ASSERT (Buffer != NULL);
QuickSort (
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
@retval <0 Buffer1 is less than Buffer2
@retval >0 Buffer1 is greater than Buffer2
**/
INTN
EFIAPI
DevicePathCompare (
IN CONST VOID *Buffer1,
IN CONST VOID *Buffer2
)
{
EFI_DEVICE_PATH_PROTOCOL *DevicePath1;
EFI_DEVICE_PATH_PROTOCOL *DevicePath2;
CHAR16 *TextPath1;
CHAR16 *TextPath2;
EFI_STATUS Status;
INTN RetVal;
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 (mUnicodeCollation == NULL) {
Status = gBS->LocateProtocol (
&gEfiUnicodeCollation2ProtocolGuid,
NULL,
(VOID **)&mUnicodeCollation
);
ASSERT_EFI_ERROR (Status);
}
TextPath1 = ConvertDevicePathToText (
DevicePath1,
FALSE,
FALSE
);
TextPath2 = ConvertDevicePathToText (
DevicePath2,
FALSE,
FALSE
);
if (TextPath1 == NULL) {
RetVal = -1;
} else if (TextPath2 == NULL) {
RetVal = 1;
} else {
RetVal = mUnicodeCollation->StriColl (
mUnicodeCollation,
TextPath1,
TextPath2
);
}
USL_FREE_NON_NULL (TextPath1);
USL_FREE_NON_NULL (TextPath2);
return (RetVal);
}
/**
Function to compare 2 strings without regard to case of the characters.
@param[in] Buffer1 Pointer to String to compare.
@param[in] Buffer2 Pointer to second String to compare.
@retval 0 Buffer1 equal to Buffer2.
@retval <0 Buffer1 is less than Buffer2.
@retval >0 Buffer1 is greater than Buffer2.
**/
INTN
EFIAPI
StringNoCaseCompare (
IN CONST VOID *Buffer1,
IN CONST VOID *Buffer2
)
{
EFI_STATUS Status;
if (mUnicodeCollation == NULL) {
Status = gBS->LocateProtocol (
&gEfiUnicodeCollation2ProtocolGuid,
NULL,
(VOID **)&mUnicodeCollation
);
ASSERT_EFI_ERROR (Status);
}
return (mUnicodeCollation->StriColl (
mUnicodeCollation,
*(CHAR16 **)Buffer1,
*(CHAR16 **)Buffer2
));
}
/**
Function to compare 2 strings.
@param[in] Buffer1 Pointer to String to compare (CHAR16**).
@param[in] Buffer2 Pointer to second String to compare (CHAR16**).
@retval 0 Buffer1 equal to Buffer2.
@retval <0 Buffer1 is less than Buffer2.
@retval >0 Buffer1 is greater than Buffer2.
**/
INTN
EFIAPI
StringCompare (
IN CONST VOID *Buffer1,
IN CONST VOID *Buffer2
)
{
return (StrCmp (
*(CHAR16 **)Buffer1,
*(CHAR16 **)Buffer2
));
}
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