proguard.classfile.instruction

Class InstructionUtil

java.lang.Object

proguard.classfile.instruction.InstructionUtil

public class InstructionUtil
extends java.lang.Object

Utility methods for converting between representations of names and descriptions.

Constructor Summary

Constructors

Constructor and Description
InstructionUtil()

Method Summary

Modifier and Type	Method and Description
static byte	arrayTypeFromInternalType(char internalType) Returns the 'newarray' type constant for the given internal primitive type.
static char	internalTypeFromArrayType(byte arrayType) Returns the internal type corresponding to the given 'newarray' type.
static boolean	isStaticCall(byte opcode) Check if an instruction opcode refers to a static call (i.e.

Methods inherited from class java.lang.Object

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

Constructor Detail

InstructionUtil

public InstructionUtil()

Method Detail

internalTypeFromArrayType

public static char internalTypeFromArrayType(byte arrayType)

Returns the internal type corresponding to the given 'newarray' type.

Parameters:

arrayType - Instruction.ARRAY_T_BOOLEAN, Instruction.ARRAY_T_BYTE , Instruction.ARRAY_T_CHAR, Instruction.ARRAY_T_SHORT, Instruction.ARRAY_T_INT, Instruction.ARRAY_T_LONG, Instruction.ARRAY_T_FLOAT, or Instruction.ARRAY_T_DOUBLE.

Returns:

TypeConstants.BOOLEAN, TypeConstants.BYTE, TypeConstants.CHAR, TypeConstants.SHORT, TypeConstants.INT , TypeConstants.LONG, TypeConstants.FLOAT, or TypeConstants.DOUBLE.

arrayTypeFromInternalType

public static byte arrayTypeFromInternalType(char internalType)

Returns the 'newarray' type constant for the given internal primitive type.

Parameters:

internalType - a primitive type TypeConstants.BOOLEAN, TypeConstants.BYTE, TypeConstants.CHAR, TypeConstants.SHORT , TypeConstants.INT, TypeConstants.LONG, TypeConstants.FLOAT, or TypeConstants.DOUBLE.

Returns:

the array type constant corresponding to the given primitive type; TypeConstants.BOOLEAN, TypeConstants.BYTE, TypeConstants.CHAR , TypeConstants.SHORT, TypeConstants.INT, TypeConstants.LONG, TypeConstants.FLOAT, or TypeConstants.DOUBLE .

See Also:

internalTypeFromArrayType(byte)

isStaticCall

public static boolean isStaticCall(byte opcode)

Check if an instruction opcode refers to a static call (i.e. no calling instance needed).

Parameters:

opcode - The instruction opcode to check

Returns:

False if this call requires a calling instance, true otherwise.