Re: [PATCH RFC 2/3] lib: test-kstrtox: add E notation tests for kstrto[u]dec64()

[Andy Shevchenko]

On Thu, Oct 01, 2026 at 12:34:57PM -0300, Rodrigo Alencar via B4 Relay wrote:

> Cover E notation parsing in kstrtoudec64() and kstrtodec64(): positive,
> zero and negative exponents, upper case 'E', an explicit '+' sign,
> truncation of integer digits by negative exponents, large values, and
> failures for overflowing or incomplete exponents.

...

>  		{"0.2",				20},
>  		{"0.18446744073709551616",	20},
>  		{"1",				20},
> +		/* E notation: exponent causes overflow */
> +		{"1e21",			1},
> +		{"2e20",			1},
> +		/* E notation: no digits after exponent marker */
> +		{"1e",			3},
> +		/* E notation: sign only after exponent marker */
> +		{"1e+",			3},
> +		{"1e-",			3},

I would also consider something like

	1ee // double 'e'
	1e+0b // an attempt to have a hexadecimal exponent

-- 
With Best Regards,
Andy Shevchenko