io_writable_length  554 io.c               long l = io_writable_length(fptr, fptr->wbuf_len);
io_writable_length  576 io.c           	long l = io_writable_length(fptr, fptr->wbuf_len);
io_writable_length  773 io.c               long l = io_writable_length(p->fptr, p->length);
io_writable_length  823 io.c           	    long l = io_writable_length(fptr, n);