Package org.eolang.opeo.decompilation

Class DecompilerState

java.lang.Object

org.eolang.opeo.decompilation.DecompilerState

public final class DecompilerState
extends Object

Internal state of decompiler. This state changes all the time between instruction handlers.

Since:

0.2

Constructor Summary

Constructors

Constructor	Description
DecompilerState()	Constructor.
DecompilerState(Deque<Opcode> opcodes, OperandStack stack, LocalVariables vars)	Constructor.
DecompilerState(LocalVariables vars)	Constructor.
DecompilerState(OperandStack ostack)	Constructor.
DecompilerState(OperandStack operands, LocalVariables vars)	Constructor.

Method Summary

Modifier and Type	Method	Description
Opcode	current()	Retrieve current bytecode instruction.
boolean	hasInstructions()	Check if there are any instructions left.
Object	operand(int index)	Instruction operand.
void	popInstruction()	Remove current instruction from the list.
String	prettyOpcodes()	Print opcodes in a pretty way.
OperandStack	stack()	Retrieve current stack.
AstNode	variable(int index, org.objectweb.asm.Type type)	Retrieve variable by index and type.

Methods inherited from class java.lang.Object

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

Constructor Details

DecompilerState

public DecompilerState()

Constructor.

DecompilerState

public DecompilerState(LocalVariables vars)

Constructor.

Parameters:

vars - Method local variables.

DecompilerState

public DecompilerState(OperandStack ostack)

Constructor.

Parameters:

ostack - Operand stack.

DecompilerState

public DecompilerState(OperandStack operands,
 LocalVariables vars)

Constructor.

Parameters:

operands - Operand stack.

vars - Method local variables.

DecompilerState

public DecompilerState(Deque<Opcode> opcodes,
 OperandStack stack,
 LocalVariables vars)

Constructor.

Parameters:

opcodes - Remaining opcodes.

stack - Operand stack.

vars - Method local variables.

Method Details

current

public Opcode current()

Retrieve current bytecode instruction.

Returns:

Current bytecode instruction.

hasInstructions

public boolean hasInstructions()

Check if there are any instructions left.

Returns:

True if there are instructions left.

popInstruction

public void popInstruction()

Remove current instruction from the list. This is used when we decompile an instruction.

operand

public Object operand(int index)

Instruction operand.

Parameters:

index - Operand index.

Returns:

Instruction operand.

variable

public AstNode variable(int index,
 org.objectweb.asm.Type type)

Retrieve variable by index and type.

Parameters:

index - Variable index.

type - Varaiable type.

Returns:

Variable node.

stack

public OperandStack stack()

Retrieve current stack.

Returns:

Operand stack.

prettyOpcodes

public String prettyOpcodes()

Print opcodes in a pretty way.

Returns:

Pretty opcodes string