kPascal

A Pascal Interpreter written in Java. kPascal is intended to be used as either a command-line Java interpreter, or as an embedded Pascal engine inside J2EE applications.

Maven Coordinates

<groupId>com.khubla.kpascal</groupId>
<artifactId>kpascal</artifactId>
<version>1.1.0</version>
<packaging>jar</packaging>

License

kPascal is distributed until the GPL v3. For more information please see the GPL.

The grammar

kPascal uses Antlr. The Pascal grammar is here

Using kPascal in code

Using a file:

FileInputStream fileInputStream = new FileInputStream("myprogram.pas");
Interpreter interpreter = new Interpreter();
interpreter.run(fileInputStream);

Using a string:

String myProgram = "program HelloWorld; begin writeln('hello'); end."
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(myProgram.getBytes());
Interpreter interpreter = new Interpreter();
interpreter.run(byteArrayInputStream);

Custom input and output streams

kPascal uses System.in and System.out as the console by default. However, it is possible to provide your own input and output IO streams.

public void runPascalProgram(InputStream pascalInputStream, InputStream consoleIn, PrintStream consoleOut){
   Interpreter interpreter = new Interpreter(consoleIn, consoleOut);
   interpreter.run(programInputStream);
}

Using kPascal from the command line

java -jar kpascal.jar --file=myprogram.pas