setvbuffer       395 ext/nkf/nkf1.7/nkf.c       setvbuffer(stdout, stdobuf, IOBUF_SIZE);
setvbuffer       404 ext/nkf/nkf1.7/nkf.c       setvbuffer(stdin, stdibuf, IOBUF_SIZE);
setvbuffer       445 ext/nkf/nkf1.7/nkf.c               setvbuffer(fin, stdibuf, IOBUF_SIZE);