3 ms·

There are a number of standard functions that can achieve this, namely in string.h. Performance is a question of course.

• rwmj 5y ago
  Which functions in particular?
  • junon 5y ago
    strchr(str, 0) == NULL memchr(str, 0, len) == NULL
    • klyrs 5y ago
      Those find the first zero -- not the number of contiguous zeros.
      • junon 5y ago
        Oops, you're right. I was going to reach for `strcspn` but then realized it doesn't work for null bytes. Huh. OP is right, there is no good function for this in the standard library.