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/** @file
Common Library Routines to assist handle HII elements.
Copyright (c) 2007 - 2008, 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.
**/
#include "LibraryInternal.h"
//
// Hii relative protocols
//
EFI_HII_DATABASE_PROTOCOL *gIfrLibHiiDatabase;
EFI_HII_STRING_PROTOCOL *gIfrLibHiiString;
GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_GUID mIfrVendorGuid = EFI_IFR_TIANO_GUID;
/**
ExtendedIfrSupportLib's constructor. It locates the required protocol:
gEfiHiiDatabaseProtocolGuid and gEfiHiiStringProtocolGuid.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS This function always completes successfully.
**/
EFI_STATUS
EFIAPI
ExtendedIfrSupportLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
Status = gBS->LocateProtocol (&gEfiHiiDatabaseProtocolGuid, NULL, (VOID **) &gIfrLibHiiDatabase);
ASSERT_EFI_ERROR (Status);
Status = gBS->LocateProtocol (&gEfiHiiStringProtocolGuid, NULL, (VOID **) &gIfrLibHiiString);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
/**
Extract formset class for given HII handle.
@param Handle The HII handle.
@param Class Class of the formset.
@param FormSetTitle Formset title string.
@param FormSetHelp Formset help string.
@retval EFI_SUCCESS Successfully extract Class for specified Hii handle.
@return Other values if failed to export packages for the given HII handle.
**/
EFI_STATUS
EFIAPI
IfrLibExtractClassFromHiiHandle (
IN EFI_HII_HANDLE Handle,
OUT UINT16 *Class,
OUT EFI_STRING_ID *FormSetTitle,
OUT EFI_STRING_ID *FormSetHelp
)
{
EFI_STATUS Status;
UINTN BufferSize;
EFI_HII_PACKAGE_LIST_HEADER *HiiPackageList;
UINT8 *Package;
UINT8 *OpCodeData;
UINT32 Offset;
UINT32 Offset2;
UINT32 PackageListLength;
EFI_HII_PACKAGE_HEADER PackageHeader;
ASSERT (Handle != NULL);
ASSERT (Class != NULL);
ASSERT (FormSetTitle != NULL);
ASSERT (FormSetHelp != NULL);
*Class = EFI_NON_DEVICE_CLASS;
*FormSetTitle = 0;
*FormSetHelp = 0;
//
// Get HII PackageList
//
BufferSize = 0;
HiiPackageList = NULL;
Status = gIfrLibHiiDatabase->ExportPackageLists (gIfrLibHiiDatabase, Handle, &BufferSize, HiiPackageList);
ASSERT (Status != EFI_NOT_FOUND);
if (Status == EFI_BUFFER_TOO_SMALL) {
HiiPackageList = AllocatePool (BufferSize);
ASSERT (HiiPackageList != NULL);
Status = gIfrLibHiiDatabase->ExportPackageLists (gIfrLibHiiDatabase, Handle, &BufferSize, HiiPackageList);
}
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get Form package from this HII package List
//
Offset = sizeof (EFI_HII_PACKAGE_LIST_HEADER);
Offset2 = 0;
PackageListLength = ReadUnaligned32 (&HiiPackageList->PackageLength);
while (Offset < PackageListLength) {
Package = ((UINT8 *) HiiPackageList) + Offset;
CopyMem (&PackageHeader, Package, sizeof (EFI_HII_PACKAGE_HEADER));
if (PackageHeader.Type == EFI_HII_PACKAGE_FORMS) {
//
// Search Class Opcode in this Form Package
//
Offset2 = sizeof (EFI_HII_PACKAGE_HEADER);
while (Offset2 < PackageHeader.Length) {
OpCodeData = Package + Offset2;
if (((EFI_IFR_OP_HEADER *) OpCodeData)->OpCode == EFI_IFR_FORM_SET_OP) {
//
// Find FormSet OpCode
//
CopyMem (FormSetTitle, &((EFI_IFR_FORM_SET *) OpCodeData)->FormSetTitle, sizeof (EFI_STRING_ID));
CopyMem (FormSetHelp, &((EFI_IFR_FORM_SET *) OpCodeData)->Help, sizeof (EFI_STRING_ID));
}
if ((((EFI_IFR_OP_HEADER *) OpCodeData)->OpCode == EFI_IFR_GUID_OP) &&
CompareGuid (&mIfrVendorGuid, (EFI_GUID *)(OpCodeData + sizeof (EFI_IFR_OP_HEADER))) &&
(((EFI_IFR_GUID_CLASS *) OpCodeData)->ExtendOpCode == EFI_IFR_EXTEND_OP_CLASS)
) {
//
// Find GUIDed Class OpCode
//
CopyMem (Class, &((EFI_IFR_GUID_CLASS *) OpCodeData)->Class, sizeof (UINT16));
//
// Till now, we ought to have found the formset Opcode
//
break;
}
Offset2 += ((EFI_IFR_OP_HEADER *) OpCodeData)->Length;
}
if (Offset2 < PackageHeader.Length) {
//
// Target formset found
//
break;
}
}
Offset += PackageHeader.Length;
}
FreePool (HiiPackageList);
return EFI_SUCCESS;
}
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