UNIX 7th Ed. - /usr/src/libc/gen/strlen.c

   1: /*
   2:  * Returns the number of
   3:  * non-NULL bytes in string argument.
   4:  */
   5: 
   6: strlen(s)
   7: register char *s;
   8: {
   9:     register n;
  10: 
  11:     n = 0;
  12:     while (*s++)
  13:         n++;
  14:     return(n);
  15: }

Defined functions