base64decode     4549 ext/nkf/nkf-utf8/nkf.c     t1 = 0x3f & base64decode(c1);
base64decode     4550 ext/nkf/nkf-utf8/nkf.c     t2 = 0x3f & base64decode(c2);
base64decode     4551 ext/nkf/nkf-utf8/nkf.c     t3 = 0x3f & base64decode(c3);
base64decode     4552 ext/nkf/nkf-utf8/nkf.c     t4 = 0x3f & base64decode(c4);