str_nth          2156 string.c           const char *pp = str_nth(p, e, nth, enc, singlebyte);
str_nth          3318 string.c           s = str_nth(sbeg, RSTRING_END(str), pos, enc, singlebyte);
str_nth          4229 string.c           p = str_nth(RSTRING_PTR(str), RSTRING_END(str), beg, enc, singlebyte);
str_nth          4231 string.c           e = str_nth(p, RSTRING_END(str), len, enc, singlebyte);