SegundaPasada

public static void pass_two( ) {
    // This procedure is an outline of pass two of a simple assembler.
    // flag that stops pass two
    boolean more_input = true;
    String line, opcode;
    // fields of the instruction
    int location_counter, length, type;
    // misc. variables
    final int END_STATEMENT = −2;
    // signals end of input
    final int MAX_CODE = 16;
    // max bytes of code per instruction
    byte code[ ] = new byte[MAX_CODE];
    // holds generated code per instruction
    location_counter = 0; // assemble first instruction at 0
    while (more_input) {
        type = read_type( );
        opcode = read_opcode( );
        length = read_length( );
        line = read_line( ); // more_input set to false by END
        // get type field of next line
        // get opcode field of next line
        // get length field of next line
        // get the actual line of input
        if (type != 0) {
            // type 0 is for comment lines
            switch(type) {
                // generate the output code
                case 1: eval_type1(opcode, length, line, code); break;
                case 2: eval_type2(opcode, length, line, code); break;
                // other cases here
            }
        }
        write_output(code);
        // write the binary code
        write_listing(code, line);
        // print one line on the listing
        location_counter = location_counter + length;
        // update loc_ctr
        if (type == END_STATEMENT) {
            // are we done with input?
            more_input = false;
            // if so, perform housekeeping tasks
            finish_up( );
            // odds and ends
        }
    }
}