strcspn(9) on Linux
The text 93c31c1b57e6, as Debian 7 (Wheezy) shipped it.
Calculate the length of the initial substring of s which does not contain letters in reject
The text 93c31c1b57e6, as Debian 7 (Wheezy) shipped it.
Calculate the length of the initial substring of s which does not contain letters in reject