X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=MdePkg%2FLibrary%2FBaseMemoryLibMmx%2FMemLibGuid.c;h=c04af6e112dd6c82c535ae50e8a207b210059ee3;hb=6fb11b1da27dd85035df985aa005cf902e153945;hp=06b2721c64f407a6ce20c477c6005b8e9ce83f63;hpb=878ddf1fc3540a715f63594ed22b6929e881afb4;p=mirror_edk2.git
diff --git a/MdePkg/Library/BaseMemoryLibMmx/MemLibGuid.c b/MdePkg/Library/BaseMemoryLibMmx/MemLibGuid.c
index 06b2721c64..c04af6e112 100644
--- a/MdePkg/Library/BaseMemoryLibMmx/MemLibGuid.c
+++ b/MdePkg/Library/BaseMemoryLibMmx/MemLibGuid.c
@@ -1,48 +1,50 @@
/** @file
Implementation of GUID functions.
- Copyright (c) 2006, 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.
-
- Module Name: MemLibGuid.c
-
- The following BaseMemoryLib instances share the same version of this file:
-
+ The following BaseMemoryLib instances contain the same copy of this file:
+
BaseMemoryLib
BaseMemoryLibMmx
BaseMemoryLibSse2
BaseMemoryLibRepStr
+ BaseMemoryLibOptDxe
+ BaseMemoryLibOptPei
PeiMemoryLib
UefiMemoryLib
+ Copyright (c) 2006 - 2010, 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.
+
**/
-/**
- This function copies a source GUID to a destination GUID.
+#include "MemLibInternals.h"
- This function copies the contents of the 128-bit GUID specified by SourceGuid
- to DestinationGuid, and returns DestinationGuid.
+/**
+ Copies a source GUID to a destination GUID.
+ This function copies the contents of the 128-bit GUID specified by SourceGuid to
+ DestinationGuid, and returns DestinationGuid.
+
If DestinationGuid is NULL, then ASSERT().
If SourceGuid is NULL, then ASSERT().
- @param DestinationGuid Pointer to the destination GUID.
- @param SourceGuid Pointer to the source GUID.
+ @param DestinationGuid The pointer to the destination GUID.
+ @param SourceGuid The pointer to the source GUID.
- @return DestinationGuid
+ @return DestinationGuid.
**/
GUID *
EFIAPI
CopyGuid (
- OUT GUID *DestinationGuid,
- IN CONST GUID *SourceGuid
+ OUT GUID *DestinationGuid,
+ IN CONST GUID *SourceGuid
)
{
WriteUnaligned64 (
@@ -57,70 +59,79 @@ CopyGuid (
}
/**
- Compares two GUIDs
-
- This function compares Guid1 to Guid2. If the GUIDs are identical then TRUE
- is returned. If there are any bit differences in the two GUIDs, then FALSE is
- returned.
+ Compares two GUIDs.
+ This function compares Guid1 to Guid2. If the GUIDs are identical then TRUE is returned.
+ If there are any bit differences in the two GUIDs, then FALSE is returned.
+
If Guid1 is NULL, then ASSERT().
If Guid2 is NULL, then ASSERT().
- @param Guid1 guid to compare
- @param Guid2 guid to compare
+ @param Guid1 A pointer to a 128 bit GUID.
+ @param Guid2 A pointer to a 128 bit GUID.
- @retval TRUE if Guid1 == Guid2
- @retval FALSE if Guid1 != Guid2
+ @retval TRUE Guid1 and Guid2 are identical.
+ @retval FALSE Guid1 and Guid2 are not identical.
**/
BOOLEAN
EFIAPI
CompareGuid (
- IN CONST GUID *Guid1,
- IN CONST GUID *Guid2
+ IN CONST GUID *Guid1,
+ IN CONST GUID *Guid2
)
{
- return (BOOLEAN)(
- ReadUnaligned64 ((CONST UINT64*)Guid1)
- == ReadUnaligned64 ((CONST UINT64*)Guid2) &&
- ReadUnaligned64 ((CONST UINT64*)Guid1 + 1)
- == ReadUnaligned64 ((CONST UINT64*)Guid2 + 1)
- );
+ UINT64 LowPartOfGuid1;
+ UINT64 LowPartOfGuid2;
+ UINT64 HighPartOfGuid1;
+ UINT64 HighPartOfGuid2;
+
+ LowPartOfGuid1 = ReadUnaligned64 ((CONST UINT64*) Guid1);
+ LowPartOfGuid2 = ReadUnaligned64 ((CONST UINT64*) Guid2);
+ HighPartOfGuid1 = ReadUnaligned64 ((CONST UINT64*) Guid1 + 1);
+ HighPartOfGuid2 = ReadUnaligned64 ((CONST UINT64*) Guid2 + 1);
+
+ return (BOOLEAN) (LowPartOfGuid1 == LowPartOfGuid2 && HighPartOfGuid1 == HighPartOfGuid2);
}
/**
Scans a target buffer for a GUID, and returns a pointer to the matching GUID
in the target buffer.
- This function searches target the buffer specified by Buffer and Length from
- the lowest address to the highest address at 128-bit increments for the
- 128-bit GUID value that matches Guid. If a match is found, then a pointer to
- the matching GUID in the target buffer is returned. If no match is found,
- then NULL is returned. If Length is 0, then NULL is returned.
-
- If Buffer is NULL, then ASSERT().
- If Buffer is not aligned on a 64-bit boundary, then ASSERT().
+ This function searches the target buffer specified by Buffer and Length from
+ the lowest address to the highest address at 128-bit increments for the 128-bit
+ GUID value that matches Guid. If a match is found, then a pointer to the matching
+ GUID in the target buffer is returned. If no match is found, then NULL is returned.
+ If Length is 0, then NULL is returned.
+
+ If Length > 0 and Buffer is NULL, then ASSERT().
+ If Buffer is not aligned on a 32-bit boundary, then ASSERT().
+ If Length is not aligned on a 128-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
- @param Buffer Pointer to the target buffer to scan.
- @param Length Number of bytes in Buffer to scan.
- @param Guid Value to search for in the target buffer.
+ @param Buffer The pointer to the target buffer to scan.
+ @param Length The number of bytes in Buffer to scan.
+ @param Guid The value to search for in the target buffer.
+
+ @return A pointer to the matching Guid in the target buffer or NULL otherwise.
- @return Pointer to the first occurrence.
- @retval NULL if Length == 0 or Guid was not found.
**/
VOID *
EFIAPI
ScanGuid (
- IN CONST VOID *Buffer,
- IN UINTN Length,
- IN CONST GUID *Guid
+ IN CONST VOID *Buffer,
+ IN UINTN Length,
+ IN CONST GUID *Guid
)
{
CONST GUID *GuidPtr;
+ ASSERT (((UINTN)Buffer & (sizeof (Guid->Data1) - 1)) == 0);
+ ASSERT (Length <= (MAX_ADDRESS - (UINTN)Buffer + 1));
+ ASSERT ((Length & (sizeof (*GuidPtr) - 1)) == 0);
+
GuidPtr = (GUID*)Buffer;
- Buffer = GuidPtr + Length / sizeof (*GuidPtr);
+ Buffer = GuidPtr + Length / sizeof (*GuidPtr);
while (GuidPtr < (CONST GUID*)Buffer) {
if (CompareGuid (GuidPtr, Guid)) {
return (VOID*)GuidPtr;