Re: [RFC]strn(case)cmp supporting negative length as third parameter

Laruence wrote:

Hi: strn(case)cmp dosen't support a negative length as its third paramter, while substr dose.

here is the rfc: https://wiki.php.net/rfc/strncmpnegativelen any question? plz worte me back. thanks

What do you exactly mean by "in the reverse order" in

if the abs of the negative length is greater than any strlen of the first two parameters, then strn(case)cmp will work as strncmp in the reverse order with the abs value:

Looking at

var_dump <http://www.php.net/var_dump>(strncmp <http://www.php.net/strncmp>("prefix_num", "num", -10)); //outpu: int(7) it seems to mean that it would be equivalent to

var_dump(strncmp("mun_xiferp", "mun", 10));

However, if I'm reading the patch correctly, it would be taking the smaller string. Ie. it would be equivalent to

var_dump <http://www.php.net/var_dump>(strncmp <http://www.php.net/strncmp>("prefix_num", "num", -3));

Seems an implementation bug.