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91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/** @file
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Language related HII Library implementation.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "InternalHiiLib.h"
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/**
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Retrieves a pointer to the a Null-terminated ASCII string containing the list
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of languages that an HII handle in the HII Database supports. The returned
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string is allocated using AllocatePool(). The caller is responsible for freeing
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the returned string using FreePool(). The format of the returned string follows
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the language format assumed the HII Database.
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If HiiHandle is NULL, then ASSERT().
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@param[in] HiiHandle A handle that was previously registered in the HII Database.
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@retval NULL HiiHandle is not registered in the HII database
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@retval NULL There are not enough resources available to retrieve the supported
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languages.
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@retval NULL The list of supported languages could not be retrieved.
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@retval Other A pointer to the Null-terminated ASCII string of supported languages.
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**/
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CHAR8 *
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EFIAPI
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HiiGetSupportedLanguages (
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IN EFI_HII_HANDLE HiiHandle
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)
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{
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EFI_STATUS Status;
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UINTN LanguageSize;
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CHAR8 TempSupportedLanguages;
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CHAR8 *SupportedLanguages;
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ASSERT (HiiHandle != NULL);
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//
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// Retrieve the size required for the supported languages buffer.
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//
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LanguageSize = 0;
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Status = gHiiString->GetLanguages (gHiiString, HiiHandle, &TempSupportedLanguages, &LanguageSize);
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//
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// If GetLanguages() returns EFI_SUCCESS for a zero size,
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// then there are no supported languages registered for HiiHandle. If GetLanguages()
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// returns an error other than EFI_BUFFER_TOO_SMALL, then HiiHandle is not present
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// in the HII Database
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//
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if (Status != EFI_BUFFER_TOO_SMALL) {
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//
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// Return NULL if the size can not be retrieved, or if HiiHandle is not in the HII Database
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//
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return NULL;
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}
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//
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// Allocate the supported languages buffer.
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//
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SupportedLanguages = AllocateZeroPool (LanguageSize);
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if (SupportedLanguages == NULL) {
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//
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// Return NULL if allocation fails.
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//
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return NULL;
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}
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//
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// Retrieve the supported languages string
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//
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Status = gHiiString->GetLanguages (gHiiString, HiiHandle, SupportedLanguages, &LanguageSize);
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if (EFI_ERROR (Status)) {
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//
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// Free the buffer and return NULL if the supported languages can not be retrieved.
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//
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FreePool (SupportedLanguages);
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return NULL;
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}
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//
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// Return the Null-terminated ASCII string of supported languages
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//
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return SupportedLanguages;
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}
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