rb_enc_nth        907 ext/iconv/iconv.c 	    start = (ps = rb_enc_nth(s, e, start, enc)) - s;
rb_enc_nth        910 ext/iconv/iconv.c 	    length = rb_enc_nth(ps, e, length, enc) - ps;
rb_enc_nth         91 include/ruby/encoding.h char* rb_enc_nth(const char*, const char*, int, rb_encoding*);
rb_enc_nth        662 sprintf.c      			char *p = rb_enc_nth(RSTRING_PTR(str), RSTRING_END(str),
rb_enc_nth       1335 string.c       	p = rb_enc_nth(p, e, nth, enc);