1) Add in fix to handle the case when a form is not related to a buffer storage.

2) Allocate Hii Handle from a bitfield array so Framework Hii Handle can be recycled.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5700 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Compatibility/FrameworkHiiToUefiHiiThunk/HiiHandle.c

@@ -0,0 +1,66 @@
+/**@file
+  Framework HII handle database allocation and deallocation functins.
+  
+Copyright (c) 2008, 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.
+
+**/
+
+
+#include "HiiHandle.h"
+
+//
+// FRAMEWORK_EFI_HII_HANDLE
+//
+UINT8 mHandle[1024 * 8] = {0};
+
+VOID
+InitHiiHandleDatabase (
+  VOID
+  )
+{
+  //
+  // FRAMEWORK_EFI_HII_HANDLE 0 is reserved.
+  // Set Bit 0 in mHandle[0] to 1.
+  //
+  mHandle[0] |= 1 << 0;
+}
+
+
+EFI_STATUS
+AllocateHiiHandle (
+  FRAMEWORK_EFI_HII_HANDLE *Handle
+  )
+{
+  UINTN       Index;
+
+  for (Index = 0; Index < sizeof (mHandle) * 8; Index++) {
+    if ((mHandle[Index / 8] & (1 << (Index % 8))) == 0) {
+      mHandle[Index / 8] |= (1 << (Index % 8));
+      *Handle = (FRAMEWORK_EFI_HII_HANDLE) Index;
+      ASSERT (*Handle != 0);
+      return EFI_SUCCESS;
+    }
+  }
+  
+  return EFI_OUT_OF_RESOURCES;
+}
+
+VOID
+FreeHiiHandle (
+  FRAMEWORK_EFI_HII_HANDLE Handle
+  )
+{
+  UINT16 Num;
+
+  Num = (UINT16) Handle;
+
+  ASSERT ((mHandle [Num / 8] & (~(1 << (Num % 8)))) != 0);
+  mHandle [Num / 8] &= (~(1 << (Num % 8)));
+}