Import some basic libraries instances for Mde Packages.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2704 6f19259b-4bc3-4df7-8a09-765794883524
2007-06-22 03:21:45 +00:00
parent e053747a04
commit e1f414b6a7
506 changed files with 45626 additions and 0 deletions
--- a/MdePkg/Library/BaseMemoryLibRepStr/MemLibGuid.c
+++ b/MdePkg/Library/BaseMemoryLibRepStr/MemLibGuid.c
@@ -0,0 +1,137 @@
+/** @file
+  Implementation of GUID functions.
+
+  Copyright (c) 2006, Intel Corporation<BR>
+  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:
+
+    BaseMemoryLib
+    BaseMemoryLibMmx
+    BaseMemoryLibSse2
+    BaseMemoryLibRepStr
+    PeiMemoryLib
+    DxeMemoryLib
+
+**/
+
+//
+// Include common header file for this module.
+//
+#include "CommonHeader.h"
+
+/**
+  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.
+
+  @return DestinationGuid.
+
+**/
+GUID *
+EFIAPI
+CopyGuid (
+  OUT GUID       *DestinationGuid,
+  IN CONST GUID  *SourceGuid
+  )
+{
+  WriteUnaligned64 (
+    (UINT64*)DestinationGuid,
+    ReadUnaligned64 ((CONST UINT64*)SourceGuid)
+    );
+  WriteUnaligned64 (
+    (UINT64*)DestinationGuid + 1,
+    ReadUnaligned64 ((CONST UINT64*)SourceGuid + 1)
+    );
+  return DestinationGuid;
+}
+
+/**
+  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       A pointer to a 128 bit GUID.
+  @param  Guid2       A pointer to a 128 bit GUID.
+
+  @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
+  )
+{
+  return (BOOLEAN)(
+           ReadUnaligned64 ((CONST UINT64*)Guid1)
+             == ReadUnaligned64 ((CONST UINT64*)Guid2) &&
+           ReadUnaligned64 ((CONST UINT64*)Guid1 + 1)
+             == ReadUnaligned64 ((CONST UINT64*)Guid2 + 1)
+           );
+}
+
+/**
+  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 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 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
+  )
+{
+  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);
+  while (GuidPtr < (CONST GUID*)Buffer) {
+    if (CompareGuid (GuidPtr, Guid)) {
+      return (VOID*)GuidPtr;
+    }
+    GuidPtr++;
+  }
+  return NULL;
+}