Re: [PATCH v2] BaseTools: align ERROR/WARNING/RETURN macros with MdePkg versions

["Gao, Liming" <liming.gao@intel.com>]

Reviewed-by: Liming Gao <liming.gao@intel.com>

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Leif Lindholm
> Sent: Friday, December 8, 2017 1:38 AM
> To: edk2-devel@lists.01.org
> Cc: Gao, Liming <liming.gao@intel.com>
> Subject: [edk2] [PATCH v2] BaseTools: align ERROR/WARNING/RETURN macros with MdePkg versions
> 
> BaseTools' BaseTypes.h defined the ENCODE_ERROR macro as
>  #define ENCODE_ERROR(a)              ((RETURN_STATUS)(MAX_BIT | (a)))
> whereas MdePkg defines it as
>  #define ENCODE_ERROR(StatusCode)     ((RETURN_STATUS)(MAX_BIT | (StatusCode)))
> 
> When building with GCC 6.3 (at least) the former triggers
> "error: overflow in implicit constant conversion [-Werror=overflow]"
> Resolve this by aligning it with the latter one.
> 
> This also requires aligning the BaseTools typedef of RETURN_STATUS with
> the MdePkg one: INTN -> UINTN.
> 
> While at it, update adjacent ENCODE_WARNING and RETURN_ERROR as well.
> 
> Add an explicit initialization of *Alignment to 0 in GenFfs.c
> GetAlignmentFromFile to get rid of a warning occuring with GCC after
> this change (-Werror=maybe-uninitialized).
> 
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
> ---
> 
> v2 updated for ENCODE_WARNING and RETURN_ERROR, as requested
> by Liming.
> 
>  BaseTools/Source/C/GenFfs/GenFfs.c            | 1 +
>  BaseTools/Source/C/Include/Common/BaseTypes.h | 8 ++++----
>  2 files changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/BaseTools/Source/C/GenFfs/GenFfs.c b/BaseTools/Source/C/GenFfs/GenFfs.c
> index e2fb3e0d1e..3b4a9b7761 100644
> --- a/BaseTools/Source/C/GenFfs/GenFfs.c
> +++ b/BaseTools/Source/C/GenFfs/GenFfs.c
> @@ -529,6 +529,7 @@ GetAlignmentFromFile(char *InFile, UINT32 *Alignment)
> 
>    InFileHandle        = NULL;
>    PeFileBuffer        = NULL;
> +  *Alignment          = 0;
> 
>    memset (&ImageContext, 0, sizeof (ImageContext));
> 
> diff --git a/BaseTools/Source/C/Include/Common/BaseTypes.h b/BaseTools/Source/C/Include/Common/BaseTypes.h
> index 198647ab95..08b60bae11 100644
> --- a/BaseTools/Source/C/Include/Common/BaseTypes.h
> +++ b/BaseTools/Source/C/Include/Common/BaseTypes.h
> @@ -170,15 +170,15 @@
>  // EFI Error Codes common to all execution phases
>  //
> 
> -typedef INTN RETURN_STATUS;
> +typedef UINTN RETURN_STATUS;
> 
>  ///
>  /// Set the upper bit to indicate EFI Error.
>  ///
> -#define ENCODE_ERROR(a)              (MAX_BIT | (a))
> +#define ENCODE_ERROR(a)              ((RETURN_STATUS)(MAX_BIT | (a)))
> 
> -#define ENCODE_WARNING(a)            (a)
> -#define RETURN_ERROR(a)              ((a) < 0)
> +#define ENCODE_WARNING(a)            ((RETURN_STATUS)(a))
> +#define RETURN_ERROR(a)              (((INTN)(RETURN_STATUS)(a)) < 0)
> 
>  #define RETURN_SUCCESS               0
>  #define RETURN_LOAD_ERROR            ENCODE_ERROR (1)
> --
> 2.11.0
> 
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