cd5ebaa06d
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10420 6f19259b-4bc3-4df7-8a09-765794883524
114 lines
3.8 KiB
C
114 lines
3.8 KiB
C
/** @file
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This library retrieves pointers to the UEFI HII Protocol instances in the
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library's constructor. All of the UEFI HII related protocols are optional,
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so the consumers of this library class must verify that the global variable
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pointers are not NULL before use.
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Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Uefi.h>
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#include <Library/UefiHiiServicesLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/DebugLib.h>
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#include <Protocol/HiiFont.h>
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#include <Protocol/HiiString.h>
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#include <Protocol/HiiImage.h>
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#include <Protocol/HiiDatabase.h>
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#include <Protocol/HiiConfigRouting.h>
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///
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/// Pointer to the UEFI HII Font Protocol
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///
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EFI_HII_FONT_PROTOCOL *gHiiFont = NULL;
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///
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/// Pointer to the UEFI HII String Protocol
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///
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EFI_HII_STRING_PROTOCOL *gHiiString = NULL;
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///
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/// Pointer to the UEFI HII Image Protocol
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///
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EFI_HII_IMAGE_PROTOCOL *gHiiImage = NULL;
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///
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/// Pointer to the UEFI HII Database Protocol
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///
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EFI_HII_DATABASE_PROTOCOL *gHiiDatabase = NULL;
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///
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/// Pointer to the UEFI HII Config Rounting Protocol
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///
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EFI_HII_CONFIG_ROUTING_PROTOCOL *gHiiConfigRouting = NULL;
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/**
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The constructor function retrieves pointers to the UEFI HII protocol instances
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The constructor function retrieves pointers to the four UEFI HII protocols from the
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handle database. These include the UEFI HII Font Protocol, the UEFI HII String
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Protocol, the UEFI HII Image Protocol, the UEFI HII Database Protocol, and the
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UEFI HII Config Routing Protocol. This function always return EFI_SUCCESS.
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All of these protocols are optional if the platform does not support configuration
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and the UEFI HII Image Protocol and the UEFI HII Font Protocol are optional if
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the platform does not support a graphical console. As a result, the consumers
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of this library much check the protocol pointers againt NULL before using them,
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or use dependency expressions to guarantee that some of them are present before
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assuming they are not NULL.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
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**/
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EFI_STATUS
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EFIAPI
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UefiHiiServicesLibConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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//
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// Retrieve the pointer to the UEFI HII String Protocol
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//
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Status = gBS->LocateProtocol (&gEfiHiiStringProtocolGuid, NULL, (VOID **) &gHiiString);
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ASSERT_EFI_ERROR (Status);
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//
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// Retrieve the pointer to the UEFI HII Database Protocol
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//
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Status = gBS->LocateProtocol (&gEfiHiiDatabaseProtocolGuid, NULL, (VOID **) &gHiiDatabase);
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ASSERT_EFI_ERROR (Status);
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//
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// Retrieve the pointer to the UEFI HII Config Routing Protocol
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//
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Status = gBS->LocateProtocol (&gEfiHiiConfigRoutingProtocolGuid, NULL, (VOID **) &gHiiConfigRouting);
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ASSERT_EFI_ERROR (Status);
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//
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// Retrieve the pointer to the optional UEFI HII Font Protocol
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//
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gBS->LocateProtocol (&gEfiHiiFontProtocolGuid, NULL, (VOID **) &gHiiFont);
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//
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// Retrieve the pointer to the optional UEFI HII Image Protocol
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//
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gBS->LocateProtocol (&gEfiHiiImageProtocolGuid, NULL, (VOID **) &gHiiImage);
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return EFI_SUCCESS;
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}
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