Re: strtol, strtoll, strtoul, strtoull: Make ISO C 23 compliant

[Eric Blake]

On Thu, Mar 16, 2023 at 04:05:18PM +0100, Bruno Haible wrote:
> ISO C 23 § 7.24.1.7 in combination with § 6.4.4.1 specifies that strtol,
> strtoll, strtoul, strtoull need to accept binary integer syntax as input,
> e.g. "0b101010" for 42.
> 
> This patch implements it, and augments the unit tests accordingly.
> 
> 
> 2023-03-16  Bruno Haible  <bruno@clisp.org>
> 
>       strtol, strtoll, strtoul, strtoull: Make ISO C 23 compliant.
>       * lib/strtol.c (INTERNAL (strtol)): Treat 'b' and base 2 like 'x' and
>       base 16. Based on glibc commit 64924422a99690d147a166b4de3103f3bf3eaf6c
>       by Joseph Myers.

C23 also supports literals with thousands separators, such as
0b0000'1111 or 0xab'cd.  Are strtol* required to support this as well?

/me goes and reads https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2626.pdf

"It is not proposed for the strto* family of functions from the C
Standard Library to support digit separators at this time"

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Eric Blake, Principal Software Engineer
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