On Sat, May 29, 2021 at 12:35 AM Joe Perches [off-list ref] wrote:

On Sat, 2021-05-29 at 00:16 +0300, Andy Shevchenko wrote:

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On Saturday, May 29, 2021, Joe Perches [off-list ref] wrote:

...

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Likely these should be 0x%02x

What’s the difference (except printing 0)?

(assuming the argument is unsigned char/u8)

%#02x will always emit more than the specified length (3 or 4 chars)
values < 16 are 0x<hexdigit>, values >= 16 are 0x<hexdigit><hexdigit>

0 will be 0, btw.

Hey Andy.  Right.

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0x%02x will always emit 4 chars

*Minimum* or at least 4 characters. There is an upper limit of sizeof(int)
* 2 + 2.

I did write assuming the argument is unsigned char/u8.
For the general unsigned int arg case, you are of course correct.

Signed char also.  Basically for all signed types and unsigned int cases.

-- 
With Best Regards,
Andy Shevchenko