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From: "Leif Lindholm" <leif@nuviainc.com>
To: Rebecca Cran <rebecca@nuviainc.com>
Cc: devel@edk2.groups.io, Ard Biesheuvel <ard.biesheuvel@arm.com>,
	nd@arm.com, Sami Mujawar <Sami.Mujawar@arm.com>,
	Liming Gao <gaoliming@byosoft.com.cn>,
	Michael D Kinney <michael.d.kinney@intel.com>,
	Zhiguang Liu <zhiguang.liu@intel.com>,
	Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>
Subject: Re: [PATCH v6 14/22] ArmPkg: Add Universal/Smbios/ProcessorSubClassDxe
Date: Thu, 28 Jan 2021 11:32:41 +0000	[thread overview]
Message-ID: <20210128113241.GU1664@vanye> (raw)
In-Reply-To: <6fa39599-5ec0-38f3-6eb0-f857c601fb8a@nuviainc.com>

On Wed, Jan 27, 2021 at 21:53:57 -0700, Rebecca Cran wrote:
> On 1/25/21 12:04 PM, Leif Lindholm wrote:
> > On Thu, Jan 14, 2021 at 09:36:20 -0700, Rebecca Cran wrote:
> > > +// Sets the HII variable `x` if `pcd` isn't empty
> > > +#define SET_HII_STRING_IF_PCD_NOT_EMPTY(pcd, x)               \
> > > +    x##Str = (CHAR16 *)PcdGetPtr (pcd); \
> > > +    if (StrLen (x##Str) > 0) {                                \
> > > +      HiiSetString (mHiiHandle, x, x##Str, NULL);             \
> > > +    }                                                         \
> > 
> > I am not a fan of preprocessor macros that require local variables
> > with magic names to exist.
> > Can this be rewritten as a helper function?
> 
> Unfortunately PcdGetPtr uses token pasting, so a helper function won't work.
> 
> Would the following be better?
> 
> #define SetHiiStringIfPcdNotEmpty(Pcd, StringId) { \
>   CHAR16 *Str = (CHAR16*)PcdGetPtr (Pcd); \
>   if (StrLen (Str) > 0) { \
>     HiiSetString (mHiiHandle, StringId, Str, NULL); \
>   } \
> }

I'm mostly OK with that. I'd say it technically violates the coding
style because of assigning a value to Str on definition, but I can't
convince myself to care about that for a macro.

However, it still needs to have the name indicate that it's a macro,
so SET_HII_STRING_IF_PCD_NOT_EMPTY.

Best Regards,

Leif

  reply	other threads:[~2021-01-28 11:32 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-14 16:36 [PATCH v6 00/22] ArmPkg,MdePkg: Add Universal/Smbios, and related changes Rebecca Cran
2021-01-14 16:36 ` [PATCH v6 01/22] BaseTools: Fix the build report crash issue Rebecca Cran
2021-01-14 16:36 ` [PATCH v6 02/22] ArmPkg: Add ARM SMC Architecture functions to ArmStdSmc.h Rebecca Cran
2021-01-15 20:55   ` [edk2-devel] " Samer El-Haj-Mahmoud
2021-01-14 16:36 ` [PATCH v6 03/22] MdePkg: Update IndustryStandard/SmBios.h with processor status data Rebecca Cran
2021-01-15  0:46   ` 回复: " gaoliming
2021-01-15 20:54   ` [edk2-devel] " Samer El-Haj-Mahmoud
2021-01-14 16:36 ` [PATCH v6 04/22] ArmPkg: Add register encoding definition for MMFR2 Rebecca Cran
2021-01-14 16:36 ` [PATCH v6 05/22] ArmPkg: Add helper to read the Memory Model Features Register 2 Rebecca Cran
2021-01-26  9:35   ` [edk2-devel] " Philippe Mathieu-Daudé
2021-01-14 16:36 ` [PATCH v6 06/22] ArmPkg: Add helper function to read the Memory Model Feature Register 4 Rebecca Cran
2021-01-14 16:36 ` [PATCH v6 07/22] ArmPkg: Fix the return type of the ReadCCSIDR function Rebecca Cran
2021-01-14 16:36 ` [PATCH v6 08/22] ArmPkg: Update ArmLibPrivate.h with cache register definitions Rebecca Cran
2021-01-14 16:36 ` [PATCH v6 09/22] ArmPkg: Add definition of the maximum cache level in ARMv8-A Rebecca Cran
2021-01-14 16:36 ` [PATCH v6 10/22] ArmPkg: Add helper to read CCIDX status Rebecca Cran
2021-01-14 16:36 ` [PATCH v6 11/22] ArmPkg: Add helper to read the CCSIDR2 register Rebecca Cran
2021-01-18  8:51   ` Sami Mujawar
2021-01-14 16:36 ` [PATCH v6 12/22] ArmPkg: Add Library/OemMiscLib.h Rebecca Cran
2021-01-15 20:56   ` [edk2-devel] " Samer El-Haj-Mahmoud
2021-01-25 17:51   ` Leif Lindholm
2021-01-14 16:36 ` [PATCH v6 13/22] ArmPkg: Add Universal/Smbios/OemMiscLibNull Rebecca Cran
2021-01-15 20:57   ` [edk2-devel] " Samer El-Haj-Mahmoud
2021-01-25 17:51   ` Leif Lindholm
2021-01-14 16:36 ` [PATCH v6 14/22] ArmPkg: Add Universal/Smbios/ProcessorSubClassDxe Rebecca Cran
2021-01-25 19:04   ` Leif Lindholm
2021-01-28  4:53     ` Rebecca Cran
2021-01-28 11:32       ` Leif Lindholm [this message]
2021-01-28 11:45         ` [edk2-devel] " Laszlo Ersek
2021-01-14 16:36 ` [PATCH v6 15/22] ArmPkg: Add Universal/Smbios/SmbiosMiscDxe/Type00 Rebecca Cran
2021-01-15 21:09   ` [edk2-devel] " Samer El-Haj-Mahmoud
2021-01-25 19:08   ` Leif Lindholm
2021-01-14 16:36 ` [PATCH v6 16/22] ArmPkg: Add Universal/Smbios/SmbiosMiscDxe/Type01 Rebecca Cran
2021-01-15 21:09   ` [edk2-devel] " Samer El-Haj-Mahmoud
2021-01-25 19:09   ` Leif Lindholm
2021-01-14 16:36 ` [PATCH v6 17/22] ArmPkg: Add Universal/Smbios/SmbiosMiscDxe/Type02 Rebecca Cran
2021-01-25 19:10   ` Leif Lindholm
2021-01-25 19:23   ` [edk2-devel] " Samer El-Haj-Mahmoud
2021-01-14 16:36 ` [PATCH v6 18/22] ArmPkg: Add Universal/Smbios/SmbiosMiscDxe/Type03 Rebecca Cran
2021-01-25 19:11   ` Leif Lindholm
2021-01-25 19:23   ` [edk2-devel] " Samer El-Haj-Mahmoud
2021-01-14 16:36 ` [PATCH v6 19/22] ArmPkg: Add Universal/Smbios/SmbiosMiscDxe/Type13 Rebecca Cran
2021-01-25 19:11   ` Leif Lindholm
2021-01-14 16:36 ` [PATCH v6 20/22] ArmPkg: Add Universal/Smbios/SmbiosMiscDxe/Type32 Rebecca Cran
2021-01-15 21:10   ` [edk2-devel] " Samer El-Haj-Mahmoud
2021-01-25 19:20     ` Rebecca Cran
2021-01-25 19:23       ` Samer El-Haj-Mahmoud
2021-01-25 19:12   ` Leif Lindholm
2021-01-14 16:36 ` [PATCH v6 21/22] ArmPkg: Add SMBIOS PCDs to ArmPkg.dec Rebecca Cran
2021-01-14 16:36 ` [PATCH v6 22/22] ArmPkg: Add Universal/Smbios/SmbiosMiscDxe Rebecca Cran
2021-01-25 19:15   ` Leif Lindholm
2021-01-25 19:23   ` [edk2-devel] " Samer El-Haj-Mahmoud
     [not found] ` <165A268B3006F467.32022@groups.io>
2021-01-14 16:40   ` [edk2-devel] [PATCH v6 01/22] BaseTools: Fix the build report crash issue Rebecca Cran

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