GET_SPACE_GOTO
GET_SPACE_GOTO(sp, bp, blen, cmd.argv[0]->len * 2 + 50);
GET_SPACE_GOTO(sp, bp, blen, nlen);
GET_SPACE_GOTO(sp, bp, blen, sizeof(action) * MAXNUM + 1);
GET_SPACE_GOTO(sp, bp, blen, len * MAX_CHARACTER_COLUMNS + 128);
GET_SPACE_GOTO(sp, bp, blen, nlen);
GET_SPACE_GOTO(sp, bp, blen, len + 1);