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/*++
Copyright (c) 2006, 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.
Module Name:
string.c
Abstract:
String support
Revision History
--*/
#include "Bds.h"
#include "String.h"
#include "Language.h"
extern UINT8 BdsStrings[];
EFI_GUID gBdsStringPackGuid = { 0x7bac95d3, 0xddf, 0x42f3, {0x9e, 0x24, 0x7c, 0x64, 0x49, 0x40, 0x37, 0x9a} };
EFI_HII_HANDLE gStringPackHandle;
EFI_HII_PROTOCOL *Hii;
EFI_STATUS
InitializeStringSupport (
VOID
)
/*++
Routine Description:
Initialize HII global accessor for string support
Arguments:
None
Returns:
String from ID.
--*/
{
EFI_STATUS Status;
EFI_HII_PACKAGES *PackageList;
//
// There should only ever be one HII protocol
//
Status = gBS->LocateProtocol (
&gEfiHiiProtocolGuid,
NULL,
(VOID**)&Hii
);
if (!EFI_ERROR (Status)) {
PackageList = PreparePackages (1, &gBdsStringPackGuid, BdsStrings);
Status = Hii->NewPack (Hii, PackageList, &gStringPackHandle);
gBS->FreePool (PackageList);
}
return Status;
}
CHAR16 *
GetStringById (
IN STRING_REF Id
)
/*++
Routine Description:
Get string by string id from HII Interface
Arguments:
Id - String ID.
Returns:
CHAR16 * - String from ID.
NULL - If error occurs.
--*/
{
CHAR16 *String;
UINTN StringLength;
EFI_STATUS Status;
//
// Set default string size assumption at no more than 256 bytes
//
StringLength = 0x100;
String = AllocateZeroPool (StringLength);
if (String == NULL) {
//
// If this happens, we are oh-so-dead, but return a NULL in any case.
//
return NULL;
}
//
// Get the current string for the current Language
//
Status = Hii->GetString (Hii, gStringPackHandle, Id, FALSE, NULL, &StringLength, String);
if (EFI_ERROR (Status)) {
if (Status == EFI_BUFFER_TOO_SMALL) {
//
// Free the old pool
//
gBS->FreePool (String);
//
// Allocate new pool with correct value
//
String = AllocatePool (StringLength);
ASSERT (String != NULL);
Status = Hii->GetString (Hii, gStringPackHandle, Id, FALSE, NULL, &StringLength, String);
if (!EFI_ERROR (Status)) {
return String;
}
}
return NULL;
}
return String;
}
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