71 lines
1.6 KiB
Java
71 lines
1.6 KiB
Java
package com.loomcom.j6502;
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import java.io.*;
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public class CommandParser {
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private BufferedReader m_in;
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private BufferedWriter m_out;
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private Simulator m_simulator;
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public CommandParser(InputStream in, OutputStream out, Simulator s) {
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m_in = new BufferedReader(new InputStreamReader(in));
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m_out = new BufferedWriter(new OutputStreamWriter(out));
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}
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public void run() {
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try {
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String command = null;
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greeting();
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prompt();
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while (!shouldQuit(command = readLine())) {
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dispatch(command);
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prompt();
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}
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writeLine("\n\nGoodbye!");
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} catch (IOException ex) {
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System.err.println("Error: " + ex.toString());
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System.exit(1);
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}
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}
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/**
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* Dispatch the command.
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*/
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public void dispatch(String command) throws IOException {
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writeLine("You entered: " + command);
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}
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/*******************************************************************
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* Private
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*******************************************************************/
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private void greeting() throws IOException {
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writeLine("Welcome to the j6502 Simulator!");
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}
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private void prompt() throws IOException {
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m_out.write("j6502> ");
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m_out.flush();
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}
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private String readLine() throws IOException {
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String line = m_in.readLine();
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if (line == null) { return null; }
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return line.trim();
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}
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private void writeLine(String line) throws IOException {
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m_out.write(line);
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m_out.newLine();
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m_out.flush();
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}
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/**
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* Returns true if the line is a quit.
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*/
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private boolean shouldQuit(String line) {
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return (line == null || "q".equals(line.toLowerCase()));
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}
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} |