This looks to me not quite intuitional.
 !(!TryBestLanguage && Language == NULL) seems more straightforward and exactly what we would like to catch.

Abner

Get Outlook for Android<https://aka.ms/ghei36>

________________________________
From: devel@edk2.groups.io <devel@edk2.groups.io> on behalf of gaoliming <gaoliming@byosoft.com.cn>
Sent: Thursday, February 4, 2021, 3:13 PM
To: devel@edk2.groups.io; Chang, Abner (HPS SW/FW Technologist); dandan.bi@intel.com
Cc: 'Dong, Eric'; Wang, Nickle (HPS SW)
Subject: 回复: [edk2-devel] [PATCH v3] MdeModulePkg/Library: Add HiiGetStringEx to UefiHiiLib for EDK2 Redfish

If TryBestLanguage is FALE and Language is NULL, then ASSERT().

So, ASSERT statement should be ASSERT (TryBestLanguage || (Language !=
NULL));

Is this clear?

Thanks
Liming
> -----邮件原件-----
> 发件人: bounce+27952+71110+4905953+8761045@groups.io
> <bounce+27952+71110+4905953+8761045@groups.io> 代表 Abner Chang
> 发送时间: 2021年2月3日 23:21
> 收件人: devel@edk2.groups.io; dandan.bi@intel.com
> 抄送: Dong, Eric <eric.dong@intel.com>; Wang, Nickle (HPS SW)
> <nickle.wang@hpe.com>
> 主题: Re: [edk2-devel] [PATCH v3] MdeModulePkg/Library: Add
> HiiGetStringEx to UefiHiiLib for EDK2 Redfish
>
> Yes Dandan, yours follow coding standard. I will handle that.
> Also, I will help to push the patch to upstream with your review tag.
>
> Thanks
> Abner
>
> > -----Original Message-----
> > From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of
> > Dandan Bi
> > Sent: Wednesday, February 3, 2021 7:34 PM
> > To: Chang, Abner (HPS SW/FW Technologist) <abner.chang@hpe.com>;
> > devel@edk2.groups.io
> > Cc: Dong, Eric <eric.dong@intel.com>; Wang, Nickle (HPS SW)
> > <nickle.wang@hpe.com>
> > Subject: Re: [edk2-devel] [PATCH v3] MdeModulePkg/Library: Add
> > HiiGetStringEx to UefiHiiLib for EDK2 Redfish
> >
> > One minor comment inline below.
> > Reviewed-by: Dandan Bi <dandan.bi@intel.com> with this is handled.
> >
> > Thanks,
> > Dandan
> > > -----Original Message-----
> > > From: Abner Chang <abner.chang@hpe.com>
> > > Sent: Monday, February 1, 2021 11:06 AM
> > > To: devel@edk2.groups.io
> > > Cc: Bi, Dandan <dandan.bi@intel.com>; Dong, Eric
> > > <eric.dong@intel.com>; Nickle Wang <nickle.wang@hpe.com>
> > > Subject: [PATCH v3] MdeModulePkg/Library: Add HiiGetStringEx to
> > > UefiHiiLib for EDK2 Redfish
> > >
> > > Add HiiGetStringEx and leveraged by HiiGetString function to support
> > > getting string with the best language in optionally. This avoids the
> > > string in x-uefi language is misled to the language defined by
> > > "PlatformLang" or the "Supported Languages". This change is introduced
> > > to support x-uefi keyword language for configuring BIOS setting.
> > >
> > > Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
> > > Signed-off-by: Siyuan Fu <siyuan.fu@intel.com>
> > > Signed-off-by: Fan Wang <fan.wang@intel.com>
> > > Signed-off-by: Abner Chang <abner.chang@hpe.com>
> > > Cc: Dandan Bi <dandan.bi@intel.com>
> > > Cc: Eric Dong <eric.dong@intel.com>
> > > Cc: Nickle Wang <nickle.wang@hpe.com>
> > > ---
> > >  MdeModulePkg/Include/Library/HiiLib.h       | 60 ++++++++++---
> > >  MdeModulePkg/Library/UefiHiiLib/HiiString.c | 98
> > > +++++++++++++++------
> > >  2 files changed, 119 insertions(+), 39 deletions(-)
> > >
> > > diff --git a/MdeModulePkg/Include/Library/HiiLib.h
> > > b/MdeModulePkg/Include/Library/HiiLib.h
> > > index c475cb74a1..cd9027fefd 100644
> > > --- a/MdeModulePkg/Include/Library/HiiLib.h
> > > +++ b/MdeModulePkg/Include/Library/HiiLib.h
> > > @@ -1,7 +1,8 @@
> > >  /** @file
> > >    Public include file for the HII Library
> > >
> > > -Copyright (c) 2007 - 2018, Intel Corporation. All rights
> > > reserved.<BR>
> > > +Copyright (c) 2007 - 2021, Intel Corporation. All rights
> > > +reserved.<BR>
> > > +(C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> > >  SPDX-License-Identifier: BSD-2-Clause-Patent
> > >
> > >  **/
> > > @@ -123,16 +124,8 @@ HiiSetString (
> > >  ;
> > >
> > >  /**
> > > -  Retrieves a string from a string package in a specific language.
> > > If the language
> > > -  is not specified, then a string from a string package in the
> > > current platform
> > > -  language is retrieved.  If the string cannot be retrieved using the
> > > specified
> > > -  language or the current platform language, then the string is
> > > retrieved from
> > > -  the string package in the first language the string package
> > > supports.  The
> > > -  returned string is allocated using AllocatePool().  The caller is
> > > responsible
> > > -  for freeing the allocated buffer using FreePool().
> > > -
> > > -  If HiiHandle is NULL, then ASSERT().
> > > -  If StringId is 0, then ASSERT().
> > > +  Retrieves a string from a string package in a specific language
> > > + specified in Language  or in the best lanaguage. See HiiGetStringEx
> > > + () for
> > > the details.
> > >
> > >    @param[in]  HiiHandle  A handle that was previously registered in
> > > the HII Database.
> > >    @param[in]  StringId   The identifier of the string to retrieved
from
> the
> > > string
> > > @@ -152,8 +145,49 @@ HiiGetString (
> > >    IN EFI_HII_HANDLE  HiiHandle,
> > >    IN EFI_STRING_ID   StringId,
> > >    IN CONST CHAR8     *Language  OPTIONAL
> > > -  )
> > > -;
> > > +  );
> > > +
> > > +/**
> > > +  Retrieves a string from a string package in a specific language or
> > > +in the best
> > > +  language at discretion of this function according to the priority
of
> > languages.
> > > +  TryBestLanguage is used to get the string in the best language or
> > > +in the language
> > > +  specified in Language parameter. The behavior is,
> > > +  If TryBestLanguage is TRUE, this function looks for the best
> > > +language for
> > > the string.
> > > +   - If the string can not be retrieved using the specified language
> > > + or the
> > > current
> > > +     platform language, then the string is retrieved from the string
> > > + package in
> > > the
> > > +     first language the string package supports.
> > > +  If TryBestLanguage is FALSE, Language must be specified for
> > > + retrieving the
> > > string.
> > > +
> > > +  The returned string is allocated using AllocatePool().  The caller
> > > + is responsible  for freeing the allocated buffer using FreePool().
> > > +
> > > +  If HiiHandle is NULL, then ASSERT().
> > > +  If StringId is 0, then ASSET.
> > > +  If TryBestLanguage is FALE and Language is NULL, then ASSERT().
> > > +
> > > +  @param[in]  HiiHandle         A handle that was previously
> registered in the
> > > HII Database.
> > > +  @param[in]  StringId          The identifier of the string to
> retrieved from
> > the
> > > string
> > > +                                package associated with
> HiiHandle.
> > > +  @param[in]  Language          The language of the string to
> retrieve.  If this
> > > parameter
> > > +                                is NULL, then the current
> platform language is used.  The
> > > +                                format of Language must follow
> the
> > > + language format
> > > assumed
> > > +                                the HII Database.
> > > +  @param[in]  TryBestLanguage   If TRUE, try to get the best
> matching
> > > language from all
> > > +                                supported languages.If FALSE,
> the
> > > + Language must be
> > > assigned
> > > +                                for the StringID.
> > > +
> > > +  @retval NULL   The string specified by StringId is not present in
the
> string
> > > package.
> > > +  @retval Other  The string was returned.
> > > +
> > > +**/
> > > +EFI_STRING
> > > +EFIAPI
> > > +HiiGetStringEx (
> > > +  IN EFI_HII_HANDLE  HiiHandle,
> > > +  IN EFI_STRING_ID   StringId,
> > > +  IN CONST CHAR8     *Language  OPTIONAL,
> > > +  IN BOOLEAN         TryBestLanguage
> > > +  );
> > >
> > >  /**
> > >    Retrieves a string from a string package named by GUID, in the
> > > specified language.
> > > diff --git a/MdeModulePkg/Library/UefiHiiLib/HiiString.c
> > > b/MdeModulePkg/Library/UefiHiiLib/HiiString.c
> > > index 95229f8a8c..a9a11aef98 100644
> > > --- a/MdeModulePkg/Library/UefiHiiLib/HiiString.c
> > > +++ b/MdeModulePkg/Library/UefiHiiLib/HiiString.c
> > > @@ -1,7 +1,8 @@
> > >  /** @file
> > >    HII Library implementation that uses DXE protocols and services.
> > >
> > > -  Copyright (c) 2006 - 2018, Intel Corporation. All rights
> > > reserved.<BR>
> > > +  Copyright (c) 2006 - 2021, Intel Corporation. All rights
> > > + reserved.<BR>
> > > + (C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
> > >    SPDX-License-Identifier: BSD-2-Clause-Patent
> > >
> > >  **/
> > > @@ -190,16 +191,8 @@ HiiGetPackageString (  }
> > >
> > >  /**
> > > -  Retrieves a string from a string package in a specific language.
> > > If the language
> > > -  is not specified, then a string from a string package in the
> > > current platform
> > > -  language is retrieved.  If the string can not be retrieved using
> > > the specified
> > > -  language or the current platform language, then the string is
> > > retrieved from
> > > -  the string package in the first language the string package
> > > supports.  The
> > > -  returned string is allocated using AllocatePool().  The caller is
> > > responsible
> > > -  for freeing the allocated buffer using FreePool().
> > > -
> > > -  If HiiHandle is NULL, then ASSERT().
> > > -  If StringId is 0, then ASSET.
> > > +  Retrieves a string from a string package in a specific language
> > > + specified in Language  or in the best lanaguage. See HiiGetStringEx
> > > + () for
> > > the details.
> > >
> > >    @param[in]  HiiHandle  A handle that was previously registered in
> > > the HII Database.
> > >    @param[in]  StringId   The identifier of the string to retrieved
from
> the
> > > string
> > > @@ -220,6 +213,51 @@ HiiGetString (
> > >    IN EFI_STRING_ID   StringId,
> > >    IN CONST CHAR8     *Language  OPTIONAL
> > >    )
> > > +{
> > > +  return HiiGetStringEx (HiiHandle, StringId, Language, TRUE); }
> > > +
> > > +/**
> > > +  Retrieves a string from a string package in a specific language or
> > > +in the best
> > > +  language at discretion of this function according to the priority
of
> > languages.
> > > +  TryBestLanguage is used to get the string in the best language or
> > > +in the language
> > > +  specified in Language parameter. The behavior is,
> > > +  If TryBestLanguage is TRUE, this function looks for the best
> > > +language for
> > > the string.
> > > +   - If the string can not be retrieved using the specified language
> > > + or the
> > > current
> > > +     platform language, then the string is retrieved from the string
> > > + package in
> > > the
> > > +     first language the string package supports.
> > > +  If TryBestLanguage is FALSE, Language must be specified for
> > > + retrieving the
> > > string.
> > > +
> > > +  The returned string is allocated using AllocatePool().  The caller
> > > + is responsible  for freeing the allocated buffer using FreePool().
> > > +
> > > +  If HiiHandle is NULL, then ASSERT().
> > > +  If StringId is 0, then ASSET.
> > > +  If TryBestLanguage is FALE and Language is NULL, then ASSERT().
> > > +
> > > +  @param[in]  HiiHandle         A handle that was previously
> registered in the
> > > HII Database.
> > > +  @param[in]  StringId          The identifier of the string to
> retrieved from
> > the
> > > string
> > > +                                package associated with
> HiiHandle.
> > > +  @param[in]  Language          The language of the string to
> retrieve.  If this
> > > parameter
> > > +                                is NULL, then the current
> platform language is used.  The
> > > +                                format of Language must follow
> the
> > > + language format
> > > assumed
> > > +                                the HII Database.
> > > +  @param[in]  TryBestLanguage   If TRUE, try to get the best
> matching
> > > language from all
> > > +                                supported languages.If FALSE,
> the
> > > + Language must be
> > > assigned
> > > +                                for the StringID.
> > > +
> > > +  @retval NULL   The string specified by StringId is not present in
the
> string
> > > package.
> > > +  @retval Other  The string was returned.
> > > +
> > > +**/
> > > +EFI_STRING
> > > +EFIAPI
> > > +HiiGetStringEx (
> > > +  IN EFI_HII_HANDLE  HiiHandle,
> > > +  IN EFI_STRING_ID   StringId,
> > > +  IN CONST CHAR8     *Language  OPTIONAL,
> > > +  IN BOOLEAN         TryBestLanguage
> > > +  )
> > >  {
> > >    EFI_STATUS  Status;
> > >    UINTN       StringSize;
> > > @@ -231,7 +269,10 @@ HiiGetString (
> > >
> > >    ASSERT (HiiHandle != NULL);
> > >    ASSERT (StringId != 0);
> > > -
> > > +  //
> > > +  // Language must be specified if TryBestLanguage = FALSE.
> > > +  //
> > > +  ASSERT (!(TryBestLanguage == FALSE && Language == NULL));
> > One minor here, in order to following the coding style, this seems
should be
> > ASSERT (!(!TryBestLanguage && Language == NULL)); Please help double
> > check.
> >
> > >    //
> > >    // Initialize all allocated buffers to NULL
> > >    //
> > > @@ -261,21 +302,26 @@ HiiGetString (
> > >      Language = "";
> > >    }
> > >
> > > -  //
> > > -  // Get the best matching language from SupportedLanguages
> > > -  //
> > > -  BestLanguage = GetBestLanguage (
> > > -                   SupportedLanguages,
> > > -                   FALSE,
> // RFC 4646 mode
> > > -                   Language,
> // Highest priority
> > > -                   PlatformLanguage != NULL ? PlatformLanguage :
> "",  // Next
> > > highest priority
> > > -                   SupportedLanguages,
> // Lowest priority
> > > -                   NULL
> > > -                   );
> > > -  if (BestLanguage == NULL) {
> > > -    goto Error;
> > > +  if (TryBestLanguage) {
> > > +    //
> > > +    // Get the best matching language from SupportedLanguages
> > > +    //
> > > +    BestLanguage = GetBestLanguage (
> > > +                     SupportedLanguages,
> > > +                     FALSE,
> // RFC 4646 mode
> > > +                     Language,
> // Highest priority
> > > +                     PlatformLanguage != NULL ?
> PlatformLanguage :
> > > + "",  // Next
> > > highest priority
> > > +                     SupportedLanguages,
> // Lowest priority
> > > +                     NULL
> > > +                     );
> > > +    if (BestLanguage == NULL) {
> > > +      goto Error;
> > > +    }
> > > +  } else {
> > > +    BestLanguage = (CHAR8 *) Language;
> > >    }
> > >
> > > +
> > >    //
> > >    // Retrieve the size of the string in the string package for the
> > BestLanguage
> > >    //
> > > @@ -337,7 +383,7 @@ Error:
> > >    if (PlatformLanguage != NULL) {
> > >      FreePool (PlatformLanguage);
> > >    }
> > > -  if (BestLanguage != NULL) {
> > > +  if (TryBestLanguage && BestLanguage != NULL) {
> > >      FreePool (BestLanguage);
> > >    }
> > >
> > > --
> > > 2.17.1
> >
> >
> >
> >
> >
>
>
>
>
>