strncmp – Tarik Billa

Is it legal to pass a non-null-terminated string to strncmp in C?

June 1, 2023 by Tarik

According to the C99 standard, section 7.21.4.4, §3., it is legal: The strncmp function returns an integer greater than, equal to, or less than zero, accordingly as the possibly null-terminated array pointed to by s1 is greater than, equal to, or less than the possibly null-terminated array pointed to by s2. Notice, however, that it … Read more

Why is string comparison so fast in python?

May 13, 2023 by Tarik

TL:DR: a slice compare is some Python overhead + a highly-optimized memcmp (unless there’s UTF-8 processing?). Ideally, use slice compares to find the first mismatch to within less than 128 bytes or something, then loop a char at a time. Or if it’s an option and the problem is important, make a modified copy of … Read more