X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=MdePkg%2FLibrary%2FBaseMemoryLibSse2%2FMemLibGuid.c;h=737341023a0e3fe7b35fe361ba819a0573d7e0c4;hb=56385d49874f4b7cee6c9a0652c6b7c10aff0e2f;hp=06b2721c64f407a6ce20c477c6005b8e9ce83f63;hpb=878ddf1fc3540a715f63594ed22b6929e881afb4;p=mirror_edk2.git
diff --git a/MdePkg/Library/BaseMemoryLibSse2/MemLibGuid.c b/MdePkg/Library/BaseMemoryLibSse2/MemLibGuid.c
index 06b2721c64..737341023a 100644
--- a/MdePkg/Library/BaseMemoryLibSse2/MemLibGuid.c
+++ b/MdePkg/Library/BaseMemoryLibSse2/MemLibGuid.c
@@ -1,7 +1,18 @@
/** @file
Implementation of GUID functions.
- Copyright (c) 2006, Intel Corporation
+ The following BaseMemoryLib instances contain the same copy of this file:
+
+ BaseMemoryLib
+ BaseMemoryLibMmx
+ BaseMemoryLibSse2
+ BaseMemoryLibRepStr
+ BaseMemoryLibOptDxe
+ BaseMemoryLibOptPei
+ PeiMemoryLib
+ UefiMemoryLib
+
+ Copyright (c) 2006 - 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
@@ -10,39 +21,30 @@
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:
-
- BaseMemoryLib
- BaseMemoryLibMmx
- BaseMemoryLibSse2
- BaseMemoryLibRepStr
- PeiMemoryLib
- UefiMemoryLib
-
**/
-/**
- 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 Pointer to the destination GUID.
+ @param SourceGuid 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.
- @return Pointer to the first occurrence.
- @retval NULL if Length == 0 or Guid was not found.
+ @return A pointer to the matching Guid in the target buffer or NULL otherwise.
+
**/
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;