path: root/IntelFrameworkPkg/Library/FrameworkIfrSupportLib/IfrOnTheFly.c

/** @file
  Library Routines to create IFR on-the-fly
  
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.             

**/

#include "IfrSupportLibInternal.h"

/**
  Create a formset
  
  The form package is a collection of forms that are intended to describe the pages that will be
  displayed to the user.
  
  @param FormSetTitle         Title of formset
  @param Guid                 Guid of formset
  @param Class                Class of formset
  @param SubClass             Sub class of formset
  @param FormBuffer           Pointer of the formset created
  @param StringBuffer         Pointer of FormSetTitile string created
  
  @retval EFI_OUT_OF_RESOURCES     No enough buffer to allocate
  @retval EFI_SUCCESS              Formset successfully created  
**/
EFI_STATUS
CreateFormSet (
  IN      CHAR16              *FormSetTitle,
  IN      EFI_GUID            *Guid,
  IN      UINT8               Class,
  IN      UINT8               SubClass,
  IN OUT  VOID                **FormBuffer,
  IN OUT  VOID                **StringBuffer
  )
{
  EFI_STATUS            Status;
  EFI_HII_IFR_PACK      IfrPack;
  FRAMEWORK_EFI_IFR_FORM_SET      FormSet;
  FRAMEWORK_EFI_IFR_END_FORM_SET  EndFormSet;
  UINT8                 *Destination;
  CHAR16                CurrentLanguage[4];
  STRING_REF            StringToken;

  //
  // Pre-allocate a buffer sufficient for us to work from.
  //
  FormBuffer = AllocateZeroPool (DEFAULT_FORM_BUFFER_SIZE);
  if (FormBuffer == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }

  //
  // Pre-allocate a buffer sufficient for us to work from.
  //
  StringBuffer = AllocateZeroPool (DEFAULT_STRING_BUFFER_SIZE);
  if (StringBuffer == NULL) {
    gBS->FreePool (FormBuffer);
    return EFI_OUT_OF_RESOURCES;
  }

  //
  // Obtain current language value
  //
  GetCurrentLanguage (CurrentLanguage);

  //
  // Add the FormSetTitle to the string buffer and get the StringToken
  //
  Status = AddString (*StringBuffer, CurrentLanguage, FormSetTitle, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Initialize the Ifr Package header data
  //
  IfrPack.Header.Length = sizeof (EFI_HII_PACK_HEADER) + sizeof (FRAMEWORK_EFI_IFR_FORM_SET) + sizeof (FRAMEWORK_EFI_IFR_END_FORM_SET);
  IfrPack.Header.Type   = EFI_HII_IFR;

  //
  // Initialize FormSet with the appropriate information
  //
  FormSet.Header.OpCode = FRAMEWORK_EFI_IFR_FORM_SET_OP;
  FormSet.Header.Length = sizeof (FRAMEWORK_EFI_IFR_FORM_SET);
  FormSet.FormSetTitle  = StringToken;
  FormSet.Class         = Class;
  FormSet.SubClass      = SubClass;
  CopyMem (&FormSet.Guid, Guid, sizeof (EFI_GUID));

  //
  // Initialize the end formset data
  //
  EndFormSet.Header.Length  = sizeof (FRAMEWORK_EFI_IFR_END_FORM_SET);
  EndFormSet.Header.OpCode  = FRAMEWORK_EFI_IFR_END_FORM_SET_OP;

  Destination               = (UINT8 *) *FormBuffer;

  //
  // Copy the formset/endformset data to the form buffer
  //
  CopyMem (Destination, &IfrPack, sizeof (EFI_HII_PACK_HEADER));

  Destination = Destination + sizeof (EFI_HII_PACK_HEADER);

  CopyMem (Destination, &FormSet, sizeof (FRAMEWORK_EFI_IFR_FORM_SET));

  Destination = Destination + sizeof (FRAMEWORK_EFI_IFR_FORM_SET);

  CopyMem (Destination, &EndFormSet, sizeof (FRAMEWORK_EFI_IFR_END_FORM_SET));
  return EFI_SUCCESS;
}

/**
  Create a form
  A form is the encapsulation of what amounts to a browser page. The header defines a FormId,
  which is referenced by the form package, among others. It also defines a FormTitle, which is a
  string to be used as the title for the form
  
  @param FormTitle        Title of the form
  @param FormId           Id of the form
  @param FormBuffer       Pointer of the form created
  @param StringBuffer     Pointer of FormTitil string created
  
  @retval EFI_SUCCESS     Form successfully created
**/
EFI_STATUS
CreateForm (
  IN      CHAR16              *FormTitle,
  IN      UINT16              FormId,
  IN OUT  VOID                *FormBuffer,
  IN OUT  VOID                *StringBuffer
  )
{
  EFI_STATUS        Status;
  FRAMEWORK_EFI_IFR_FORM      Form;
  FRAMEWORK_EFI_IFR_END_FORM  EndForm;
  CHAR16            CurrentLanguage[4];
  STRING_REF        StringToken;

  //
  // Obtain current language value
  //
  GetCurrentLanguage (CurrentLanguage);

  Status = AddString (StringBuffer, CurrentLanguage, FormTitle, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  Form.Header.OpCode  = FRAMEWORK_EFI_IFR_FORM_OP;
  Form.Header.Length  = sizeof (FRAMEWORK_EFI_IFR_FORM);
  Form.FormId         = FormId;
  Form.FormTitle      = StringToken;

  Status              = AddOpCode (FormBuffer, &Form);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  EndForm.Header.OpCode = FRAMEWORK_EFI_IFR_END_FORM_OP;
  EndForm.Header.Length = sizeof (FRAMEWORK_EFI_IFR_END_FORM);

  Status                = AddOpCode (FormBuffer, &EndForm);

  return Status;
}

/**
  Create a SubTitle
  
  Subtitle strings are intended to be used by authors to separate sections of questions into semantic
  groups.
  
  @param SubTitle         Sub title to be created
  @param FormBuffer       Where this subtitle to add to
  @param StringBuffer     String buffer created for subtitle
  
  @retval EFI_SUCCESS      Subtitle successfully created
**/
EFI_STATUS
CreateSubTitle (
  IN      CHAR16              *SubTitle,
  IN OUT  VOID                *FormBuffer,
  IN OUT  VOID                *StringBuffer
  )
{
  EFI_STATUS        Status;
  FRAMEWORK_EFI_IFR_SUBTITLE  Subtitle;
  CHAR16            CurrentLanguage[4];
  STRING_REF        StringToken;

  //
  // Obtain current language value
  //
  GetCurrentLanguage (CurrentLanguage);

  Status = AddString (StringBuffer, CurrentLanguage, SubTitle, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  Subtitle.Header.OpCode  = FRAMEWORK_EFI_IFR_SUBTITLE_OP;
  Subtitle.Header.Length  = sizeof (FRAMEWORK_EFI_IFR_SUBTITLE);
  Subtitle.SubTitle       = StringToken;

  Status                  = AddOpCode (FormBuffer, &Subtitle);

  return Status;
}

/**
  Create a line of text
  Unlike HTML, text is simply another tag. 
  This tag type enables IFR to be more easily localized.
  
  @param String          - First string of the text
  @param String2         - Second string of the text
  @param String3         - Help string of the text
  @param Flags           - Flag of the text
  @param Key             - Key of the text
  @param FormBuffer      - The form where this text adds to
  @param StringBuffer    - String buffer created for String, String2 and String3
  
  @retval EFI_SUCCESS     - Text successfully created
**/
EFI_STATUS
CreateText (
  IN      CHAR16              *String,
  IN      CHAR16              *String2,
  IN      CHAR16              *String3,
  IN      UINT8               Flags,
  IN      UINT16              Key,
  IN OUT  VOID                *FormBuffer,
  IN OUT  VOID                *StringBuffer
  )
{
  EFI_STATUS    Status;
  FRAMEWORK_EFI_IFR_TEXT  Text;
  CHAR16        CurrentLanguage[4];
  STRING_REF    StringToken;

  //
  // Obtain current language value
  //
  GetCurrentLanguage (CurrentLanguage);

  //
  // Add first string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, String, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  Text.Header.OpCode  = FRAMEWORK_EFI_IFR_TEXT_OP;
  Text.Header.Length  = sizeof (FRAMEWORK_EFI_IFR_TEXT);
  Text.Text           = StringToken;

  //
  // Add second string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, String2, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  Text.TextTwo  = StringToken;

  Text.Flags    = (UINT8) (Flags | FRAMEWORK_EFI_IFR_FLAG_CREATED);
  Text.Key      = Key;

  //
  // Add second string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, String3, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  Text.Help = StringToken;

  Status    = AddOpCode (FormBuffer, &Text);

  return Status;
}

/**
  Create a hyperlink
  
  @param FormId         Form ID of the hyperlink
  @param Prompt         Prompt of the hyperlink
  @param FormBuffer     The form where this hyperlink adds to
  @param StringBuffer   String buffer created for Prompt
  
  @retval EFI_SUCCESS   Hyperlink successfully created  
**/
EFI_STATUS
CreateGoto (
  IN      UINT16              FormId,
  IN      CHAR16              *Prompt,
  IN OUT  VOID                *FormBuffer,
  IN OUT  VOID                *StringBuffer
  )
{
  EFI_STATUS  Status;
  FRAMEWORK_EFI_IFR_REF Hyperlink;
  CHAR16      CurrentLanguage[4];
  STRING_REF  StringToken;

  //
  // Obtain current language value
  //
  GetCurrentLanguage (CurrentLanguage);

  Status = AddString (StringBuffer, CurrentLanguage, Prompt, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  Hyperlink.Header.OpCode = FRAMEWORK_EFI_IFR_REF_OP;
  Hyperlink.Header.Length = sizeof (FRAMEWORK_EFI_IFR_REF);
  Hyperlink.FormId        = FormId;
  Hyperlink.Prompt        = StringToken;

  Status                  = AddOpCode (FormBuffer, &Hyperlink);

  return Status;
}

/**
  Create a one-of question with a set of options to choose from.  The
  OptionsList is a pointer to a null-terminated list of option descriptions.

  @param QuestionId      - Question ID of the one-of box
  @param DataWidth       - DataWidth of the one-of box
  @param Prompt          - Prompt of the one-of box
  @param Help            - Help of the one-of box
  @param OptionsList     - Each string in it is an option of the one-of box
  @param OptionCount     - Option string count
  @param FormBuffer      - The form where this one-of box adds to
  @param StringBuffer    - String buffer created for Prompt, Help and Option strings
  
  @retval EFI_DEVICE_ERROR    - DataWidth > 2
  @retval EFI_SUCCESS         - One-Of box successfully created.
**/
EFI_STATUS
CreateOneOf (
  IN      UINT16              QuestionId,
  IN      UINT8               DataWidth,
  IN      CHAR16              *Prompt,
  IN      CHAR16              *Help,
  IN      IFR_OPTION          *OptionsList,
  IN      UINTN               OptionCount,
  IN OUT  VOID                *FormBuffer,
  IN OUT  VOID                *StringBuffer
  )
{
  EFI_STATUS            Status;
  UINTN                 Index;
  FRAMEWORK_EFI_IFR_ONE_OF        OneOf;
  FRAMEWORK_EFI_IFR_ONE_OF_OPTION OneOfOption;
  FRAMEWORK_EFI_IFR_END_ONE_OF    EndOneOf;
  CHAR16                CurrentLanguage[4];
  STRING_REF            StringToken;

  //
  // We do not create op-code storage widths for one-of in excess of 16 bits for now
  //
  if (DataWidth > 2) {
    return EFI_DEVICE_ERROR;
  }

  //
  // Obtain current language value
  //
  GetCurrentLanguage (CurrentLanguage);

  //
  // Add first string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, Prompt, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  OneOf.Header.OpCode = FRAMEWORK_EFI_IFR_ONE_OF_OP;
  OneOf.Header.Length = sizeof (FRAMEWORK_EFI_IFR_ONE_OF);
  OneOf.QuestionId    = QuestionId;
  OneOf.Width         = DataWidth;
  OneOf.Prompt        = StringToken;

  //
  // Add second string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, Help, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  OneOf.Help  = StringToken;

  Status      = AddOpCode (FormBuffer, &OneOf);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  for (Index = 0; Index < OptionCount; Index++) {
    OneOfOption.Header.OpCode = FRAMEWORK_EFI_IFR_ONE_OF_OPTION_OP;
    OneOfOption.Header.Length = sizeof (FRAMEWORK_EFI_IFR_ONE_OF_OPTION);

    //
    // Add string and get token back
    //
    Status              = AddString (StringBuffer, CurrentLanguage, OptionsList[Index].OptionString, &StringToken);

    OneOfOption.Option  = StringToken;
    OneOfOption.Value   = OptionsList[Index].Value;
    OneOfOption.Flags   = (UINT8) (OptionsList[Index].Flags | FRAMEWORK_EFI_IFR_FLAG_CREATED);
    OneOfOption.Key     = OptionsList[Index].Key;

    Status              = AddOpCode (FormBuffer, &OneOfOption);

    if (EFI_ERROR (Status)) {
      return Status;
    }
  }

  EndOneOf.Header.Length  = sizeof (FRAMEWORK_EFI_IFR_END_ONE_OF);
  EndOneOf.Header.OpCode  = FRAMEWORK_EFI_IFR_END_ONE_OF_OP;

  Status                  = AddOpCode (FormBuffer, &EndOneOf);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  return EFI_SUCCESS;
}

/**
  Create a one-of question with a set of options to choose from.  The
  OptionsList is a pointer to a null-terminated list of option descriptions.
  
  @param QuestionId      - Question ID of the ordered list
  @param MaxEntries      - MaxEntries of the ordered list
  @param Prompt          - Prompt of the ordered list
  @param Help            - Help of the ordered list
  @param OptionsList     - Each string in it is an option of the ordered list
  @param OptionCount     - Option string count
  @param FormBuffer      - The form where this ordered list adds to
  @param StringBuffer    - String buffer created for Prompt, Help and Option strings
  
  @retval EFI_SUCCESS     - Ordered list successfully created.
**/
EFI_STATUS
CreateOrderedList (
  IN      UINT16              QuestionId,
  IN      UINT8               MaxEntries,
  IN      CHAR16              *Prompt,
  IN      CHAR16              *Help,
  IN      IFR_OPTION          *OptionsList,
  IN      UINTN               OptionCount,
  IN OUT  VOID                *FormBuffer,
  IN OUT  VOID                *StringBuffer
  )
{
  EFI_STATUS            Status;
  UINTN                 Index;
  FRAMEWORK_EFI_IFR_ORDERED_LIST  OrderedList;
  FRAMEWORK_EFI_IFR_ONE_OF_OPTION OrderedListOption;
  FRAMEWORK_EFI_IFR_END_ONE_OF    EndOrderedList;
  CHAR16                CurrentLanguage[4];
  STRING_REF            StringToken;

  //
  // Obtain current language value
  //
  GetCurrentLanguage (CurrentLanguage);

  //
  // Add first string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, Prompt, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  OrderedList.Header.OpCode = FRAMEWORK_EFI_IFR_ORDERED_LIST_OP;
  OrderedList.Header.Length = sizeof (FRAMEWORK_EFI_IFR_ORDERED_LIST);
  OrderedList.QuestionId    = QuestionId;
  OrderedList.MaxEntries    = MaxEntries;
  OrderedList.Prompt        = StringToken;

  //
  // Add second string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, Help, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  OrderedList.Help  = StringToken;

  Status            = AddOpCode (FormBuffer, &OrderedList);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  for (Index = 0; Index < OptionCount; Index++) {
    OrderedListOption.Header.OpCode = FRAMEWORK_EFI_IFR_ONE_OF_OPTION_OP;
    OrderedListOption.Header.Length = sizeof (FRAMEWORK_EFI_IFR_ONE_OF_OPTION);

    //
    // Add string and get token back
    //
    Status                    = AddString (StringBuffer, CurrentLanguage, OptionsList[Index].OptionString, &StringToken);

    OrderedListOption.Option  = StringToken;
    OrderedListOption.Value   = OptionsList[Index].Value;
    OrderedListOption.Flags   = (UINT8) (OptionsList[Index].Flags | FRAMEWORK_EFI_IFR_FLAG_CREATED);
    OrderedListOption.Key     = OptionsList[Index].Key;

    Status                    = AddOpCode (FormBuffer, &OrderedListOption);

    if (EFI_ERROR (Status)) {
      return Status;
    }
  }

  EndOrderedList.Header.Length  = sizeof (FRAMEWORK_EFI_IFR_END_ONE_OF);
  EndOrderedList.Header.OpCode  = FRAMEWORK_EFI_IFR_END_ONE_OF_OP;

  Status                        = AddOpCode (FormBuffer, &EndOrderedList);

  return Status;
}

/**
  Create a checkbox
  
  @param QuestionId       Question ID of the check box
  @param DataWidth        DataWidth of the check box
  @param Prompt           Prompt of the check box
  @param Help             Help of the check box  
  @param Flags            Flags of the check box
  @param FormBuffer       The form where this check box adds to
  @param StringBuffer     String buffer created for Prompt and Help.
  
  @retval  EFI_DEVICE_ERROR    DataWidth > 1
  @retval EFI_SUCCESS          Check box successfully created
**/
EFI_STATUS
CreateCheckBox (
  IN      UINT16              QuestionId,
  IN      UINT8               DataWidth,
  IN      CHAR16              *Prompt,
  IN      CHAR16              *Help,
  IN      UINT8               Flags,
  IN OUT  VOID                *FormBuffer,
  IN OUT  VOID                *StringBuffer
  )
{
  EFI_STATUS        Status;
  FRAMEWORK_EFI_IFR_CHECKBOX  CheckBox;
  CHAR16            CurrentLanguage[4];
  STRING_REF        StringToken;

  //
  // We do not create op-code storage widths for checkbox in excess of 8 bits for now
  //
  if (DataWidth > 1) {
    return EFI_DEVICE_ERROR;
  }

  //
  // Obtain current language value
  //
  GetCurrentLanguage (CurrentLanguage);

  //
  // Add first string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, Prompt, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  CheckBox.Header.OpCode  = FRAMEWORK_EFI_IFR_CHECKBOX_OP;
  CheckBox.Header.Length  = sizeof (FRAMEWORK_EFI_IFR_CHECKBOX);
  CheckBox.QuestionId     = QuestionId;
  CheckBox.Width          = DataWidth;
  CheckBox.Prompt         = StringToken;

  //
  // Add second string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, Help, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  CheckBox.Help   = StringToken;
  CheckBox.Flags  = (UINT8) (Flags | FRAMEWORK_EFI_IFR_FLAG_CREATED);

  Status          = AddOpCode (FormBuffer, &CheckBox);
  
  return Status;
}

/**
  Create a numeric
  
  @param QuestionId       Question ID of the numeric
  @param DataWidth        DataWidth of the numeric
  @param Prompt           Prompt of the numeric
  @param Help             Help of the numeric
  @param Minimum          Minumun boundary of the numeric
  @param Maximum          Maximum boundary of the numeric
  @param Step             Step of the numeric
  @param Default          Default value
  @param Flags            Flags of the numeric
  @param Key              Key of the numeric
  @param FormBuffer       The form where this numeric adds to
  @param StringBuffer     String buffer created for Prompt and Help.

  @retval EFI_DEVICE_ERROR       DataWidth > 2
  @retval EFI_SUCCESS            Numeric is successfully created  
**/
EFI_STATUS
CreateNumeric (
  IN      UINT16              QuestionId,
  IN      UINT8               DataWidth,
  IN      CHAR16              *Prompt,
  IN      CHAR16              *Help,
  IN      UINT16              Minimum,
  IN      UINT16              Maximum,
  IN      UINT16              Step,
  IN      UINT16              Default,
  IN      UINT8               Flags,
  IN      UINT16              Key,
  IN OUT  VOID                *FormBuffer,
  IN OUT  VOID                *StringBuffer
  )
{
  EFI_STATUS      Status;
  FRAMEWORK_EFI_IFR_NUMERIC Numeric;
  CHAR16          CurrentLanguage[4];
  STRING_REF      StringToken;

  //
  // We do not create op-code storage widths for numerics in excess of 16 bits for now
  //
  if (DataWidth > 2) {
    return EFI_DEVICE_ERROR;
  }

  //
  // Obtain current language value
  //
  GetCurrentLanguage (CurrentLanguage);

  //
  // Add first string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, Prompt, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  Numeric.Header.OpCode = FRAMEWORK_EFI_IFR_NUMERIC_OP;
  Numeric.Header.Length = sizeof (FRAMEWORK_EFI_IFR_NUMERIC);
  Numeric.QuestionId    = QuestionId;
  Numeric.Width         = DataWidth;
  Numeric.Prompt        = StringToken;

  //
  // Add second string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, Help, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  Numeric.Help    = StringToken;
  Numeric.Minimum = Minimum;
  Numeric.Maximum = Maximum;
  Numeric.Step    = Step;
  Numeric.Default = Default;
  Numeric.Flags   = (UINT8) (Flags | FRAMEWORK_EFI_IFR_FLAG_CREATED);
  Numeric.Key     = Key;

  Status          = AddOpCode (FormBuffer, &Numeric);

  return Status;
}

/**
  Create a string
  
  @param QuestionId      - Question ID of the string
  @param DataWidth       - DataWidth of the string
  @param Prompt          - Prompt of the string
  @param Help            - Help of the string
  @param MinSize         - Min size boundary of the string
  @param MaxSize         - Max size boundary of the string
  @param Flags           - Flags of the string
  @param Key             - Key of the string
  @param FormBuffer      - The form where this string adds to
  @param StringBuffer    - String buffer created for Prompt and Help.
  @retval EFI_SUCCESS     - String successfully created.  
**/
EFI_STATUS
CreateString (
  IN      UINT16              QuestionId,
  IN      UINT8               DataWidth,
  IN      CHAR16              *Prompt,
  IN      CHAR16              *Help,
  IN      UINT8               MinSize,
  IN      UINT8               MaxSize,
  IN      UINT8               Flags,
  IN      UINT16              Key,
  IN OUT  VOID                *FormBuffer,
  IN OUT  VOID                *StringBuffer
  )
{
  EFI_STATUS      Status;
  FRAMEWORK_EFI_IFR_STRING  String;
  CHAR16          CurrentLanguage[4];
  STRING_REF      StringToken;

  //
  // Obtain current language value
  //
  GetCurrentLanguage (CurrentLanguage);

  //
  // Add first string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, Prompt, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  String.Header.OpCode  = FRAMEWORK_EFI_IFR_STRING_OP;
  String.Header.Length  = sizeof (FRAMEWORK_EFI_IFR_STRING);
  String.QuestionId     = QuestionId;
  String.Width          = DataWidth;
  String.Prompt         = StringToken;

  //
  // Add second string, get first string's token
  //
  Status = AddString (StringBuffer, CurrentLanguage, Help, &StringToken);

  if (EFI_ERROR (Status)) {
    return Status;
  }

  String.Help     = StringToken;
  String.MinSize  = MinSize;
  String.MaxSize  = MaxSize;
  String.Flags    = (UINT8) (Flags | FRAMEWORK_EFI_IFR_FLAG_CREATED);
  String.Key      = Key;

  Status          = AddOpCode (FormBuffer, &String);

  return Status;
}