de.projectory.koivima.compiler.assembler
Class AssemblerCompiler

java.lang.Object
  de.projectory.koivima.compiler.assembler.AssemblerCompiler

public class AssemblerCompiler
extends java.lang.Object

Compiles a piece of assembly code for the virtual machine.

Field Summary

java.util.ArrayList<java.lang.String>	operators names of available operators
(package private) java.lang.String	packageName Name of the package containing the operators.
(package private) java.lang.String	packagePath Path to the directory containing the operators

Constructor Summary

AssemblerCompiler()
Creates a new compiler.

Method Summary

CodeBlock	compile(java.lang.String assemblyCode, ExecutionContext context) Compiles a string into an executable code block
CodeBlock	compileCodeBlock(Parser parser, ExecutionContext context) Reads tokens in assembly language from a parser until the end of a code block and compiles them to an executable codeblock.
protected AbstractElementList	compileList(AbstractElementList list, Parser parser, ExecutionContext context)
java.util.ArrayList<java.lang.String>	createListOfOperators() Looks for class files in de/projectory/koivima/operators/ and creates an internal list of operators.
void	setOperatorsPath(java.lang.String pathname) Sets the path to a new set of operators.
protected Element	tokenToElement(java.lang.String token, Parser parser, ExecutionContext context) Converts a token to an executable element of the virtual machine.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

operators

public java.util.ArrayList<java.lang.String> operators

names of available operators

packagePath

java.lang.String packagePath

Path to the directory containing the operators

packageName

java.lang.String packageName

Name of the package containing the operators. Note that this needs a . at the end

Constructor Detail

AssemblerCompiler

public AssemblerCompiler()

Creates a new compiler. Operators are created dynamically from the classes in the vm's operators directory. So the list of tokens this compiler knows depends on the contents of that directory.

Method Detail

setOperatorsPath

public void setOperatorsPath(java.lang.String pathname)

Sets the path to a new set of operators. This method should be used if the compiler should compile a custumized instruction set.

Parameters:

pathname - Directory containing the operators, for example de/projectory/koivima/operators/

createListOfOperators

public java.util.ArrayList<java.lang.String> createListOfOperators()

Looks for class files in de/projectory/koivima/operators/ and creates an internal list of operators. The compiler uses this list to map tokens to operators. This method should be called if the operators are changed at runtime.

tokenToElement

protected Element tokenToElement(java.lang.String token,
                                 Parser parser,
                                 ExecutionContext context)
                          throws java.io.IOException

Converts a token to an executable element of the virtual machine.

Returns:

The element that created from the token. null if the token is invalid.

Throws:

java.io.IOException

compileList

protected AbstractElementList compileList(AbstractElementList list,
                                          Parser parser,
                                          ExecutionContext context)
                                   throws java.io.IOException

Throws:

java.io.IOException

compileCodeBlock

public CodeBlock compileCodeBlock(Parser parser,
                                  ExecutionContext context)
                           throws java.io.IOException

Reads tokens in assembly language from a parser until the end of a code block and compiles them to an executable codeblock.

Parameters:

parser - Previously created Parser that provides the tokens for the compiler.

Throws:

java.io.IOException

compile

public CodeBlock compile(java.lang.String assemblyCode,
                         ExecutionContext context)
                  throws java.io.IOException

Compiles a string into an executable code block

Throws:

java.io.IOException