Package com.tonic.util

Class InstructionLength

java.lang.Object

com.tonic.util.InstructionLength

public final class InstructionLength
extends Object

Encoded length of a single instruction in a raw bytecode array, for scanners that walk code without parsing it into instruction objects.

Method Summary

Modifier and Type	Method	Description
static int	at(byte[] code, int offset)	The encoded length of the instruction at an offset, including its opcode byte.

Methods inherited from class java.lang.Object

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

Method Detail

at

public static int at(byte[] code,
                     int offset)

The encoded length of the instruction at an offset, including its opcode byte. All fixed-length instructions derive from Opcode.getOperandCount(), so the only cases spelled out here are the three whose length depends on the code around them.

Parameters:

code - the raw bytecode

offset - the offset of the instruction's opcode byte

Returns:

the length in bytes, or -1 if the instruction is truncated or malformed