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Re: [PATCH v3 01/24] xen/ctype: introduce is_console_printable()
- To: dmukhin@xxxxxxxx
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 22 Jan 2025 08:19:07 +0100
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 22 Jan 2025 07:19:14 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 04.01.2025 02:58, Denis Mukhin via B4 Relay wrote:
> --- a/xen/include/xen/ctype.h
> +++ b/xen/include/xen/ctype.h
> @@ -4,6 +4,8 @@
> /*
> * NOTE! This ctype does not handle EOF like the standard C
> * library is required to.
> + *
> + * See Rule 21.13 in docs/misra/rules.rst.
> */
As previously indicated, I object to such comments. I think I said so before:
_All_ Misra rules are relevant _everywhere_ anyway.
> @@ -51,4 +53,9 @@ static inline unsigned char __toupper(unsigned char c)
> #define tolower(c) ((char)__tolower(c))
> #define toupper(c) ((char)__toupper(c))
>
> +static inline unsigned is_console_printable(unsigned char c)
> +{
> + return isprint(c) || c == '\n' || c == '\t';
> +}
Why a return type of unsigned (and then not even "unsigned int")? I can't
spot anything in the file which would serve as a reference for this, and
by its nature the function clearly wants to return bool.
I further question the placement of this function in ctype.h: Only console
related code cares about this function, so exposure is far too wide this
way.
Jan
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