Re: replace strtok()

On 6/24/24 19:57, Peter Eisentraut wrote:
> On 24.06.24 02:34, Michael Paquier wrote:
>> On Sat, Jun 22, 2024 at 11:48:21AM -0400, Tom Lane wrote:
>>> Peter Eisentraut <peter(at)eisentraut(dot)org> writes:
>>>> On 18.06.24 13:43, Ranier Vilela wrote:
>>>>> I found another implementation of strsep, it seems lighter to me.
>>>>> I will attach it for consideration, however, I have not done any
>>>>> testing.
>>>
>>>> Yeah, surely there are many possible implementations.  I'm thinking,
>>>> since we already took other str*() functions from OpenBSD, it makes
>>>> sense to do this here as well, so we have only one source to deal with.
>>>
>>> Why not use strpbrk?  That's equally thread-safe, it's been there
>>> since C89, and it doesn't have the problem that you can't find out
>>> which of the delimiter characters was found.
>>
>> Yeah, strpbrk() has been used in the tree as far as 2003 without any
>> port/ implementation.
>
> The existing uses of strpbrk() are really just checking whether some
> characters exist in a string, more like an enhanced strchr().  I don't
> see any uses for tokenizing a string like strtok() or strsep() would do.
>  I think that would look quite cumbersome.  So I think a simpler and
> more convenient abstraction like strsep() would still be worthwhile.

I agree that using strsep() in these cases seems more natural. Since
this patch provides a default implementation compatibility does not seem
like a big issue.

I've also reviewed the rest of the patch and it looks good to me.

Regards,
-David