audk/MdePkg/Include/Protocol/HiiString.h

/** @file
  The file provides services to manipulate string data.
  
Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under 
the terms and conditions of the BSD License that 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.             

**/

#ifndef __HII_STRING_H__
#define __HII_STRING_H__

#include <Protocol/HiiFont.h>

#define EFI_HII_STRING_PROTOCOL_GUID \
  { 0xfd96974, 0x23aa, 0x4cdc, { 0xb9, 0xcb, 0x98, 0xd1, 0x77, 0x50, 0x32, 0x2a } }

typedef struct _EFI_HII_STRING_PROTOCOL EFI_HII_STRING_PROTOCOL;

/**
  This function adds the string String to the group of strings owned by PackageList, with the
  specified font information StringFontInfo, and returns a new string id.
  The new string identifier is guaranteed to be unique within the package list. 
  That new string identifier is reserved for all languages in the package list. 

  @param  This                   A pointer to the EFI_HII_STRING_PROTOCOL instance.
  @param  PackageList            The handle of the package list where this string will
                                 be added.
  @param  StringId               On return, contains the new strings id, which is
                                 unique within PackageList.
  @param  Language               Points to the language for the new string.
  @param  LanguageName           Points to the printable language name to associate
                                 with the passed in  Language field.If LanguageName
                                 is not NULL and the string package header's
                                 LanguageName  associated with a given Language is
                                 not zero, the LanguageName being passed in will
                                 be ignored.
  @param  String                 Points to the new null-terminated string.
  @param  StringFontInfo         Points to the new string's font information or
                                 NULL if the string should have the default system
                                 font, size and style.

  @retval EFI_SUCCESS            The new string was added successfully.
  @retval EFI_NOT_FOUND          The specified PackageList could not be found in
                                 database.
  @retval EFI_OUT_OF_RESOURCES   Could not add the string due to lack of resources.
  @retval EFI_INVALID_PARAMETER  String is NULL, or StringId is NULL, or Language is NULL.
  @retval EFI_INVALID_PARAMETER  The specified StringFontInfo does not exist in
                                 current database.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_HII_NEW_STRING)(
  IN CONST  EFI_HII_STRING_PROTOCOL   *This,
  IN        EFI_HII_HANDLE            PackageList,
  OUT       EFI_STRING_ID             *StringId,
  IN CONST  CHAR8                     *Language,
  IN  CONST CHAR16                    *LanguageName, OPTIONAL  
  IN CONST  EFI_STRING                String,
  IN CONST  EFI_FONT_INFO             *StringFontInfo OPTIONAL
);


/**
  This function retrieves the string specified by StringId which is associated
  with the specified PackageList in the language Language and copies it into
  the buffer specified by String.

  @param  This                   A pointer to the EFI_HII_STRING_PROTOCOL instance.
  @param  Language               Points to the language for the retrieved string.
  @param  PackageList            The package list in the HII database to search for
                                 the  specified string.
  @param  StringId               The string's id, which is unique within
                                 PackageList.
  @param  String                 Points to the new null-terminated string.
  @param  StringSize             On entry, points to the size of the buffer pointed
                                 to by  String, in bytes. On return, points to the
                                 length of the string, in bytes.
  @param  StringFontInfo         If not NULL, points to the string's font
                                 information.  It's caller's responsibility to free
                                 this buffer.

  @retval EFI_SUCCESS            The string was returned successfully.
  @retval EFI_NOT_FOUND          The string specified by StringId is not available.
                                 The specified PackageList is not in the database.
  @retval EFI_INVALID_LANGUAGE    The string specified by StringId is available but 
                                  not in the specified language.
  @retval EFI_BUFFER_TOO_SMALL   The buffer specified by StringSize is too small to
                                 hold the string.
  @retval EFI_INVALID_PARAMETER   The Language or StringSize was NULL.
  @retval EFI_INVALID_PARAMETER   The value referenced by StringSize was not zero and
                                  String was NULL.
  @retval EFI_OUT_OF_RESOURCES    There were insufficient resources to complete the
                                  request.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_HII_GET_STRING)(
  IN CONST  EFI_HII_STRING_PROTOCOL *This,
  IN CONST  CHAR8                   *Language,
  IN        EFI_HII_HANDLE          PackageList,
  IN        EFI_STRING_ID           StringId,
  OUT       EFI_STRING              String,
  IN OUT    UINTN                   *StringSize,
  OUT       EFI_FONT_INFO           **StringFontInfo OPTIONAL
);

/**
  This function updates the string specified by StringId in the specified PackageList to the text
  specified by String and, optionally, the font information specified by StringFontInfo.

  @param  This                   A pointer to the EFI_HII_STRING_PROTOCOL instance.
  @param  PackageList            The package list containing the strings.
  @param  StringId               The string's id, which is unique within
                                 PackageList.
  @param  Language               Points to the language for the updated string.
  @param  String                 Points to the new null-terminated string.
  @param  StringFontInfo         Points to the string's font information or NULL if
                                 the  string font information is not changed.

  @retval EFI_SUCCESS            The string was updated successfully.
  @retval EFI_NOT_FOUND          The string specified by StringId is not in the
                                 database.
  @retval EFI_INVALID_PARAMETER  The String or Language was NULL.
  @retval EFI_INVALID_PARAMETER  The specified StringFontInfo does not exist in
                                 current database.
  @retval EFI_OUT_OF_RESOURCES   The system is out of resources to accomplish the
                                 task.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_HII_SET_STRING)(
  IN CONST  EFI_HII_STRING_PROTOCOL *This,
  IN        EFI_HII_HANDLE          PackageList,
  IN        EFI_STRING_ID           StringId,
  IN CONST  CHAR8                   *Language,
  IN        EFI_STRING              String,
  IN CONST  EFI_FONT_INFO           *StringFontInfo OPTIONAL
);


/**
  This function returns the list of supported languages.

  @param  This                   A pointer to the EFI_HII_STRING_PROTOCOL instance.
  @param  PackageList            The package list to examine.
  @param  Languages              Points to the buffer to hold the returned
                                 null-terminated ASCII string.
  @param  LanguagesSize          On entry, points to the size of the buffer pointed
                                 to by Languages, in bytes. On return, points to
                                 the length of Languages, in bytes.

  @retval EFI_SUCCESS            The languages were returned successfully.
  @retval EFI_INVALID_PARAMETER  The LanguagesSize was NULL.
  @retval EFI_INVALID_PARAMETER  The value referenced by LanguagesSize is not zero
                                 and Languages is NULL.
  @retval EFI_BUFFER_TOO_SMALL   The LanguagesSize is too small to hold the list of
                                 supported languages. LanguageSize is updated to
                                 contain the required size.
  @retval EFI_NOT_FOUND          Could not find string package in specified
                                 packagelist.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_HII_GET_LANGUAGES)(
  IN CONST  EFI_HII_STRING_PROTOCOL   *This,
  IN        EFI_HII_HANDLE            PackageList,
  IN OUT    CHAR8                     *Languages,
  IN OUT    UINTN                     *LanguagesSize
);


/**
  Each string package has associated with it a single primary language and zero
  or more secondary languages. This routine returns the secondary languages
  associated with a package list.

  @param  This                   A pointer to the EFI_HII_STRING_PROTOCOL instance.
  @param  PackageList            The package list to examine.
  @param  PrimaryLanguage        Points to the null-terminated ASCII string that specifies
                                 the primary language. Languages are specified in the
                                 format specified in Appendix M of the UEFI 2.0 specification.
  @param  SecondaryLanguages     Points to the buffer to hold the returned null-terminated
                                 ASCII string that describes the list of
                                 secondary languages for the specified
                                 PrimaryLanguage. If there are no secondary
                                 languages, the function returns successfully, but
                                 this is set to NULL.
  @param  SecondaryLanguagesSize On entry, points to the size of the buffer pointed
                                 to by SecondaryLanguages, in bytes. On return,
                                 points to the length of SecondaryLanguages in bytes.

  @retval EFI_SUCCESS            Secondary languages were correctly returned.
  @retval EFI_INVALID_PARAMETER  PrimaryLanguage or SecondaryLanguagesSize was NULL.
  @retval EFI_INVALID_PARAMETER  The value referenced by SecondaryLanguagesSize is not
                                 zero and SecondaryLanguages is NULL.
  @retval EFI_BUFFER_TOO_SMALL   The buffer specified by SecondaryLanguagesSize is
                                 too small to hold the returned information.
                                 SecondaryLanguageSize is updated to hold the size of
                                 the buffer required.
  @retval EFI_INVALID_LANGUAGE   The language specified by PrimaryLanguage is not
                                 present in the specified package list.
  @retval EFI_NOT_FOUND          The specified PackageList is not in the Database.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_HII_GET_2ND_LANGUAGES)(
  IN CONST  EFI_HII_STRING_PROTOCOL   *This,
  IN        EFI_HII_HANDLE            PackageList,
  IN CONST  CHAR8                     *PrimaryLanguage,
  IN OUT    CHAR8                     *SecondaryLanguages,
  IN OUT    UINTN                     *SecondaryLanguagesSize
);


///
/// Services to manipulate the string.
///
struct _EFI_HII_STRING_PROTOCOL {
  EFI_HII_NEW_STRING        NewString;
  EFI_HII_GET_STRING        GetString;
  EFI_HII_SET_STRING        SetString;
  EFI_HII_GET_LANGUAGES     GetLanguages;
  EFI_HII_GET_2ND_LANGUAGES GetSecondaryLanguages;
};


extern EFI_GUID gEfiHiiStringProtocolGuid;

#endif