rb_read_internal 1164 io.c           	    r = rb_read_internal(fptr->fd, fptr->rbuf, fptr->rbuf_capa);
rb_read_internal 1431 io.c           	    c = rb_read_internal(fptr->fd, RSTRING_PTR(str)+offset, n);
rb_read_internal 1736 io.c           	n = rb_read_internal(fptr->fd, RSTRING_PTR(str), len);
rb_read_internal 3575 io.c               n = rb_read_internal(fptr->fd, RSTRING_PTR(str), ilen);