added interactive command prompt

.classpath

@@ -22,5 +22,10 @@
 			<attribute name="javadoc_location" value="https://commons.apache.org/proper/commons-lang/javadocs/api-3.5/"/>
 		</attributes>
 	</classpathentry>
+	<classpathentry kind="lib" path="lib/commons-cli-1.4.jar">
+		<attributes>
+			<attribute name="javadoc_location" value="http://commons.apache.org/proper/commons-cli/javadocs/api-release/"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="output" path="bin"/>
 </classpath>

src/pp/s1184725/boppi/util/InteractivePrompt.java

@@ -0,0 +1,93 @@
+package pp.s1184725.boppi.util;
+
+import java.util.Scanner;
+import java.util.logging.Logger;
+
+import org.apache.commons.cli.*;
+
+import pp.iloc.model.Program;
+import pp.s1184725.boppi.ToolChain;
+
+/**
+ * Provides an interactive command line for Boppi.
+ * 
+ * @author Frank Wibbelink
+ */
+public class InteractivePrompt {
+	private static CommandLine cmd;
+	private static Scanner sc;
+
+	/**
+	 * Runs the interactive command line.
+	 * 
+	 * @param args
+	 *            unused
+	 */
+	public static void main(String[] args) {
+		Options options = new Options();
+		options.addOption("s", "stateless", false, "run stateless (every command will run in a fresh environment)");
+		options.addOption("n", "empty-line", false, "keep reading a single command until the user enters an empty line");
+		options.addOption("h", "help", false, "display this message");
+		options.addOption("p", "print-program", false, "prints the program before executing it");
+		options.addOption("D", "debug", false, "runs a program in debug mode");
+		options.addOption("k", "keep", false, "appends every new command to previous input (implies --stateless)");
+		
+		try {
+			cmd = new DefaultParser().parse(options, args);
+		}
+		catch (ParseException e) {
+			System.err.println(e.getLocalizedMessage());
+			return;
+		}
+		
+		if (cmd.hasOption("h")) {
+			HelpFormatter formatter = new HelpFormatter();
+			formatter.printHelp("boppi", "", options, "Exit a program by typing 'exit' on a line.");
+			return;
+		}
+
+		sc = new Scanner(System.in);
+		
+		if (cmd.hasOption("n"))
+			sc.useDelimiter("\r?\n\r?\n");
+		else
+			sc.useDelimiter("\r?\n");
+		
+		if (cmd.hasOption("s") || cmd.hasOption("k"))
+			stateless();
+		else
+			System.err.println("Stateful interactive mode is not supported.");
+		
+		sc.close();
+	}
+	
+	private static void stateless() {
+		Logger logger = Logger.getAnonymousLogger();
+		String saved = "";
+		while (sc.hasNext()) {
+			String command = sc.next().trim();
+			
+			if(command.equals(""))
+				continue;
+			
+			if (command.equals("exit"))
+				break;
+			
+			String code = saved+command;
+			
+			if (cmd.hasOption("k"))
+				saved = code+";\n";
+			
+			Program program = ToolChain.compile(ToolChain.getCharStream(code), logger);
+			
+			if (cmd.hasOption("p")) {
+				for (String line : program.prettyPrint().split("\n"))
+					System.out.println("--- "+line);
+			}
+			
+			for (String str : ToolChain.execute(program, logger, "").split("\n"))
+				System.out.println("<<< "+str);
+		}
+	}
+
+}

util/javadoc.xml

@@ -1,12 +1,13 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <project default="javadoc">
     <target name="javadoc">
-        <javadoc access="public" author="true" classpath="../lib/commons-lang3-3.5.jar;../lib/antlr-4.7-complete.jar;../lib/junit-4.12.jar;../lib/hamcrest-all-1.3.jar" destdir="../doc/javadoc" nodeprecated="false" nodeprecatedlist="false" noindex="false" nonavbar="false" notree="false" packagenames="pp.*" source="1.8" sourcepath="../src" splitindex="false" use="true" version="true">
+        <javadoc access="public" author="true" classpath="../lib/commons-lang3-3.5.jar;../lib/commons-cli-1.4.jar;../lib/antlr-4.7-complete.jar;../lib/junit-4.12.jar;../lib/hamcrest-all-1.3.jar" destdir="../doc/javadoc" nodeprecated="false" nodeprecatedlist="false" noindex="false" nonavbar="false" notree="false" packagenames="pp.*" source="1.8" sourcepath="../src" splitindex="false" use="true" version="true">
             <link href="http://www.antlr.org/api/Java/"/>
             <link href="http://hamcrest.org/JavaHamcrest/javadoc/1.3/"/>
             <link href="https://docs.oracle.com/javase/8/docs/api/"/>
             <link href="http://junit.org/junit4/javadoc/4.12/"/>
             <link href="https://commons.apache.org/proper/commons-lang/javadocs/api-3.5/"/>
+        	<link href="http://commons.apache.org/proper/commons-cli/javadocs/api-release/"/>
         </javadoc>
     </target>
 </project>