IntelFrameworkPkg/Library/HiiLibFramework/HiiLibFramework.c

   1 /** @file
   2   HII Library implementation that uses DXE protocols and services.
   3
   4   Copyright (c) 2006, Intel Corporation<BR>
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15
  16 #include <FrameworkDxe.h>
  17
  18
  19 #include <Protocol/FrameworkHii.h>
  20
  21 #include <Library/HiiLib.h>
  22 #include <Library/DebugLib.h>
  23 #include <Library/UefiBootServicesTableLib.h>
  24 #include <Library/MemoryAllocationLib.h>
  25
  26 EFI_HII_PROTOCOL      *gHiiProtocol = NULL;
  27
  28 /**
  29   The constructor function for HiiLibFramework library instance
  30
  31   The constructor function locates Hii protocol from protocol database.
  32   It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.
  33
  34   @param  ImageHandle   The firmware allocated handle for the EFI image.
  35   @param  SystemTable   A pointer to the EFI System Table.
  36
  37   @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
  38
  39 **/
  40 EFI_STATUS
  41 EFIAPI
  42 HiiLibFrameworkConstructor (
  43   IN      EFI_HANDLE                ImageHandle,
  44   IN      EFI_SYSTEM_TABLE          *SystemTable
  45   )
  46 {
  47   EFI_STATUS Status;
  48
  49   Status = gBS->LocateProtocol (
  50                   &gEfiHiiProtocolGuid,
  51                   NULL,
  52                   (VOID **) &gHiiProtocol
  53                   );
  54   ASSERT_EFI_ERROR (Status);
  55
  56   return Status;
  57
  58 }
  59
  60 /**
  61   This function allocates pool for an EFI_HII_PACKAGES structure
  62   with enough space for the variable argument list of package pointers.
  63   The allocated structure is initialized using NumberOfPackages, Guid,
  64   and the variable length argument list of package pointers.
  65
  66   @param  NumberOfPackages The number of HII packages to prepare.
  67   @param  Guid Package GUID.
  68
  69   @return The allocated and initialized packages.
  70
  71 **/
  72 EFI_HII_PACKAGES *
  73 InternalPreparePackages (
  74   IN UINTN           NumberOfPackages,
  75   IN CONST EFI_GUID  *Guid OPTIONAL,
  76   IN VA_LIST         Args
  77   )
  78 {
  79   EFI_HII_PACKAGES  *HiiPackages;
  80   VOID              **Package;
  81   UINTN             Index;
  82
  83   ASSERT (NumberOfPackages > 0);
  84
  85   HiiPackages                   = AllocateZeroPool (sizeof (EFI_HII_PACKAGES) + NumberOfPackages * sizeof (VOID *));
  86   ASSERT (HiiPackages != NULL);
  87
  88   HiiPackages->GuidId           = (EFI_GUID *) Guid;
  89   HiiPackages->NumberOfPackages = NumberOfPackages;
  90   Package                       = (VOID **) (((UINT8 *) HiiPackages) + sizeof (EFI_HII_PACKAGES));
  91
  92   for (Index = 0; Index < NumberOfPackages; Index++) {
  93     *Package = VA_ARG (Args, VOID *);
  94     Package++;
  95   }
  96
  97   return HiiPackages;
  98
  99 }
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