Re: [PATCH v6 1/3] lib/vsprintf: Add support for printing V4L2 and DRM fourccs

[Andy Shevchenko]

On Mon, Feb 08, 2021 at 10:58:55PM +0200, Andy Shevchenko wrote:
> On Mon, Feb 08, 2021 at 10:43:30PM +0200, Andy Shevchenko wrote:
> > On Mon, Feb 8, 2021 at 10:11 PM Sakari Ailus
> > <sakari.ailus@xxxxxxxxxxxxxxx> wrote:

...

> __le32 val;
> 
> val = cpu_to_le32(*fourcc & ~BIT(31));
> 
> p += string_escape_mem(&val, sizeof(*fourcc), output, sizeof(output), ESCAPE_NP | ESCAPE_HEX, NULL);

sizeof(val) and as we are discussing in parallel emails something like
skip_trailing_spaces() to be applied after above.

The rationale of the above, that we reuse existing code and existing standard
for the escaping non-printable characters.

-- 
With Best Regards,
Andy Shevchenko