Module org.kink_lang.kink

Package org.kink_lang.kink.internal.callstack

Class Lnums

java.lang.Object

org.kink_lang.kink.internal.callstack.Lnums

public final class Lnums
extends Object

Support class for lnums in the call stack.

Method Summary

Modifier and Type	Method	Description
static int	getArgCount(long lnum)	Extracts argCount from the lnum.
static int	getDataStackUsage(long lnum)	Extracts dataStackUsage from the lnum.
static int	getProgramCounter(long lnum)	Extracts programCounter from the lnum.
static long	makeLnum(int programCounter, int argCount, int dataStackUsage)	Makes an lnum composing three int nums.

Methods inherited from class java.lang.Object

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

Method Details

makeLnum

public static long makeLnum(int programCounter,
 int argCount,
 int dataStackUsage)

Makes an lnum composing three int nums. Each arg must be unsigned 20bit int.

Parameters:

programCounter - the program counter.

argCount - the count of args of the frame.

dataStackUsage - the used size of dataStack.

Returns:

the lnum.

getProgramCounter

public static int getProgramCounter(long lnum)

Extracts programCounter from the lnum.

Parameters:

lnum - made by makeLnum(int,int,int).

Returns:

the programCounter.

getArgCount

public static int getArgCount(long lnum)

Extracts argCount from the lnum.

Parameters:

lnum - made by makeLnum(int,int,int).

Returns:

the argCount.

getDataStackUsage

public static int getDataStackUsage(long lnum)

Extracts dataStackUsage from the lnum.

Parameters:

lnum - made by makeLnum(int,int,int).

Returns:

the dataStackUsage.