rb_write_internal  555 io.c               return rb_write_internal(fptr->fd, fptr->wbuf+fptr->wbuf_off, l);
rb_write_internal  577 io.c           	r = rb_write_internal(fptr->fd, fptr->wbuf+fptr->wbuf_off, l);
rb_write_internal  774 io.c               return rb_write_internal(p->fptr->fd, RSTRING_PTR(p->str)+p->offset, l);
rb_write_internal  824 io.c           	    r = rb_write_internal(fptr->fd, RSTRING_PTR(str)+offset, l);
rb_write_internal 3056 io.c                           r = rb_write_internal(fptr->fd, ds, dp-ds);