/**
* Fach: ALG
* Logo2Java-Parser
* by Gilles Zimmermann, Stefan Urech
* (c) by zugut.ch
* 30.01.2006
*/
options {
LOOKAHEAD = 1;
DEBUG_PARSER = true;
}
PARSER_BEGIN(Logo)
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class Logo
{
public static FileWriter fileWriter = null;
public static String outputFileName = ".." + File.separatorChar + "build" + File.separatorChar;
public static int repcount = 0;
public static void main(String args[]) throws ParseException,
TokenMgrError
{
if( args == null || args.length < 1 )
{
System.out.println("Wrong parameter!");
System.exit(0);
}
FileReader reader = null;
try
{
reader = new FileReader( new File(args[0] ));
}
catch (FileNotFoundException e)
{
System.out.println("File Not Found: " + args[0]);
System.exit(1);
}
Logo parser = new Logo(reader);
try
{
parser.program();
System.out.println("\nFinished!");
}
catch (ParseException x)
{
System.out.println("Syntaxtic Error\n" + x.toString() ); throw x;
}
catch (TokenMgrError x)
{
System.out.println("Lexical Error\n" + x.toString() ); throw x;
}
}
/**
* Schreibt einen Text in die Output-Datei
*/
public static void Write( String text )
{
try
{
fileWriter.write(text);
}
catch( IOException e )
{
System.out.println( e.toString() );
System.exit(0);
}
}
/**
* Schreibt einen Text in die Output-Datei
*/
public static void WriteLine( String text )
{
try
{
fileWriter.write(text + "\n" );
}
catch( IOException e )
{
System.out.println( e.toString() + "\n\r");
System.exit(0);
}
}
/**
* Erstellt den Filewriter für den gegebenen Dateiname
*/
public static void CreateFileWriter( String filename )
{
try
{
FileWriter htmlWriter = new FileWriter( outputFileName + filename + ".html", false );
htmlWriter.write( "\n" );
htmlWriter.flush();
htmlWriter.close();
}
catch( IOException e )
{
System.out.println( e.toString() );
System.exit(0);
}
try
{
fileWriter = new FileWriter( outputFileName + filename + ".java", false );
}
catch( IOException e )
{
System.out.println( e.toString() );
System.exit(0);
}
}
public static void CloseFileWriter()
{
try
{
fileWriter.flush();
fileWriter.close();
}
catch( IOException e )
{
System.out.println( e.toString() );
System.exit(0);
}
}
}
PARSER_END(Logo)
SKIP: {
"#" : WithinComment
}
SKIP:
{
"\n" : DEFAULT
}
SKIP:
{
"\r" : DEFAULT
}
SKIP:
{
"\r\n" : DEFAULT
}
MORE:
{
<~[]>
}
SKIP: {
}
SKIP: {
}
TOKEN :
{
|
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<#DIGIT: ["0"-"9"]> |
<#DIGITS: ()+>|
("." )?>|
<#LCHAR: ["a"-"z"]> |
<#UCHAR: ["A"-"Z"]> |
<#CHAR: | > |
|
( | )*>
}
void program() :
{
Token t;
}
{
t =
{
CreateFileWriter( t.image.toLowerCase() );
WriteLine("import java.awt.Graphics;");
WriteLine("");
WriteLine("public class " + t.image.toLowerCase() + " extends java.applet.Applet {");
WriteLine("");
WriteLine("private LogoPrimitives logo;");
}
(subroutine())*
{
WriteLine("public void paint(Graphics g) {");
WriteLine("logo = new LogoPrimitives(this);");
WriteLine("");
}
(statement())*
{
WriteLine("}");
WriteLine("}");
CloseFileWriter();
}
}
void subroutine() :
{
String komma = "";
Token t = null;
}
{
t =
{
Write( "public void " + t.image + "( " );
}
(
":"
t =
{
Write( komma + "double " + t.image );
komma = ", ";
}
)*
{
Write( ") {" );
}
(statement())*
{
WriteLine( "}" );
}
}
void statement() :
{
Token t = null;
String komma = "";
}
{
{ WriteLine("logo.cs();"); } |
{ WriteLine("logo.pd();"); }|
{ WriteLine("logo.pu();"); }|
{ WriteLine("logo.ht();"); }|
{ WriteLine("logo.st();"); }|
{ Write("logo.fd("); } nExpr() { WriteLine(");"); }|
{ Write("logo.bk("); } nExpr() { WriteLine(");"); }|
{ Write("logo.lt("); } nExpr() { WriteLine(");"); }|