+++ /dev/null
-/** @file\r
- Implementation of GUID functions.\r
-\r
- Copyright (c) 2006, Intel Corporation<BR>\r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
-\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
-\r
- Module Name: MemLibGuid.c\r
-\r
- The following BaseMemoryLib instances share the same version of this file:\r
-\r
- BaseMemoryLib\r
- BaseMemoryLibMmx\r
- BaseMemoryLibSse2\r
- BaseMemoryLibRepStr\r
- PeiMemoryLib\r
- DxeMemoryLib\r
-\r
-**/\r
-\r
-/**\r
- Copies a source GUID to a destination GUID.\r
-\r
- This function copies the contents of the 128-bit GUID specified by SourceGuid to\r
- DestinationGuid, and returns DestinationGuid.\r
- If DestinationGuid is NULL, then ASSERT().\r
- If SourceGuid is NULL, then ASSERT().\r
-\r
- @param DestinationGuid Pointer to the destination GUID.\r
- @param SourceGuid Pointer to the source GUID.\r
-\r
- @return DestinationGuid.\r
-\r
-**/\r
-GUID *\r
-EFIAPI\r
-CopyGuid (\r
- OUT GUID *DestinationGuid,\r
- IN CONST GUID *SourceGuid\r
- )\r
-{\r
- WriteUnaligned64 (\r
- (UINT64*)DestinationGuid,\r
- ReadUnaligned64 ((CONST UINT64*)SourceGuid)\r
- );\r
- WriteUnaligned64 (\r
- (UINT64*)DestinationGuid + 1,\r
- ReadUnaligned64 ((CONST UINT64*)SourceGuid + 1)\r
- );\r
- return DestinationGuid;\r
-}\r
-\r
-/**\r
- Compares two GUIDs.\r
-\r
- This function compares Guid1 to Guid2. If the GUIDs are identical then TRUE is returned.\r
- If there are any bit differences in the two GUIDs, then FALSE is returned.\r
- If Guid1 is NULL, then ASSERT().\r
- If Guid2 is NULL, then ASSERT().\r
-\r
- @param Guid1 A pointer to a 128 bit GUID.\r
- @param Guid2 A pointer to a 128 bit GUID.\r
-\r
- @retval TRUE Guid1 and Guid2 are identical.\r
- @retval FALSE Guid1 and Guid2 are not identical.\r
-\r
-**/\r
-BOOLEAN\r
-EFIAPI\r
-CompareGuid (\r
- IN CONST GUID *Guid1,\r
- IN CONST GUID *Guid2\r
- )\r
-{\r
- UINT64 LowPartOfGuid1;\r
- UINT64 LowPartOfGuid2;\r
- UINT64 HighPartOfGuid1;\r
- UINT64 HighPartOfGuid2;\r
-\r
- LowPartOfGuid1 = ReadUnaligned64 ((CONST UINT64*) Guid1);\r
- LowPartOfGuid2 = ReadUnaligned64 ((CONST UINT64*) Guid2);\r
- HighPartOfGuid1 = ReadUnaligned64 ((CONST UINT64*) Guid1 + 1);\r
- HighPartOfGuid2 = ReadUnaligned64 ((CONST UINT64*) Guid2 + 1);\r
-\r
- return (BOOLEAN) (LowPartOfGuid1 == LowPartOfGuid2 && HighPartOfGuid1 == HighPartOfGuid2);\r
-}\r
-\r
-/**\r
- Scans a target buffer for a GUID, and returns a pointer to the matching GUID\r
- in the target buffer.\r
-\r
- This function searches target the buffer specified by Buffer and Length from\r
- the lowest address to the highest address at 128-bit increments for the 128-bit\r
- GUID value that matches Guid. If a match is found, then a pointer to the matching\r
- GUID in the target buffer is returned. If no match is found, then NULL is returned.\r
- If Length is 0, then NULL is returned.\r
- If Length > 0 and Buffer is NULL, then ASSERT().\r
- If Buffer is not aligned on a 32-bit boundary, then ASSERT().\r
- If Length is not aligned on a 128-bit boundary, then ASSERT().\r
- If Length is greater than (MAX_ADDRESS ? Buffer + 1), then ASSERT(). \r
-\r
- @param Buffer Pointer to the target buffer to scan.\r
- @param Length Number of bytes in Buffer to scan.\r
- @param Guid Value to search for in the target buffer.\r
-\r
- @return A pointer to the matching Guid in the target buffer or NULL otherwise.\r
-\r
-**/\r
-VOID *\r
-EFIAPI\r
-ScanGuid (\r
- IN CONST VOID *Buffer,\r
- IN UINTN Length,\r
- IN CONST GUID *Guid\r
- )\r
-{\r
- CONST GUID *GuidPtr;\r
-\r
- ASSERT (((UINTN)Buffer & (sizeof (Guid->Data1) - 1)) == 0);\r
- ASSERT (Length <= (MAX_ADDRESS - (UINTN)Buffer + 1));\r
- ASSERT ((Length & (sizeof (*GuidPtr) - 1)) == 0);\r
-\r
- GuidPtr = (GUID*)Buffer;\r
- Buffer = GuidPtr + Length / sizeof (*GuidPtr);\r
- while (GuidPtr < (CONST GUID*)Buffer) {\r
- if (CompareGuid (GuidPtr, Guid)) {\r
- return (VOID*)GuidPtr;\r
- }\r
- GuidPtr++;\r
- }\r
- return NULL;\r
-}\r