proguard.classfile.instruction.InstructionUtil Maven / Gradle / Ivy
/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2018 GuardSquare NV
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.instruction;
import proguard.classfile.ClassConstants;
import static proguard.classfile.ClassConstants.*;
import static proguard.classfile.instruction.InstructionConstants.*;
/**
* Utility methods for converting between representations of names and
* descriptions.
*
* @author Eric Lafortune
*/
public class InstructionUtil
{
/**
* Returns the internal type corresponding to the given 'newarray' type.
* @param arrayType InstructionConstants.ARRAY_T_BOOLEAN
,
* InstructionConstants.ARRAY_T_BYTE
,
* InstructionConstants.ARRAY_T_CHAR
,
* InstructionConstants.ARRAY_T_SHORT
,
* InstructionConstants.ARRAY_T_INT
,
* InstructionConstants.ARRAY_T_LONG
,
* InstructionConstants.ARRAY_T_FLOAT
, or
* InstructionConstants.ARRAY_T_DOUBLE
.
* @return ClassConstants.TYPE_BOOLEAN
,
* ClassConstants.TYPE_BYTE
,
* ClassConstants.TYPE_CHAR
,
* ClassConstants.TYPE_SHORT
,
* ClassConstants.TYPE_INT
,
* ClassConstants.TYPE_LONG
,
* ClassConstants.TYPE_FLOAT
, or
* ClassConstants.TYPE_DOUBLE
.
*/
public static char internalTypeFromArrayType(byte arrayType)
{
switch (arrayType)
{
case InstructionConstants.ARRAY_T_BOOLEAN: return ClassConstants.TYPE_BOOLEAN;
case InstructionConstants.ARRAY_T_CHAR: return ClassConstants.TYPE_CHAR;
case InstructionConstants.ARRAY_T_FLOAT: return ClassConstants.TYPE_FLOAT;
case InstructionConstants.ARRAY_T_DOUBLE: return ClassConstants.TYPE_DOUBLE;
case InstructionConstants.ARRAY_T_BYTE: return ClassConstants.TYPE_BYTE;
case InstructionConstants.ARRAY_T_SHORT: return ClassConstants.TYPE_SHORT;
case InstructionConstants.ARRAY_T_INT: return ClassConstants.TYPE_INT;
case InstructionConstants.ARRAY_T_LONG: return ClassConstants.TYPE_LONG;
default: throw new IllegalArgumentException("Unknown array type ["+arrayType+"]");
}
}
/**
* Returns the newarray type constant for the given internal primitive
* type.
*
* @param internalType a primitive type ('Z','B','I',...)
* @return the array type constant corresponding to the given
* primitive type.
* @see #internalTypeFromArrayType(byte)
*/
public static byte arrayTypeFromInternalType(char internalType)
{
switch (internalType)
{
case TYPE_BOOLEAN: return ARRAY_T_BOOLEAN;
case TYPE_BYTE: return ARRAY_T_BYTE;
case TYPE_CHAR: return ARRAY_T_CHAR;
case TYPE_SHORT: return ARRAY_T_SHORT;
case TYPE_INT: return ARRAY_T_INT;
case TYPE_LONG: return ARRAY_T_LONG;
case TYPE_FLOAT: return ARRAY_T_FLOAT;
case TYPE_DOUBLE: return ARRAY_T_DOUBLE;
default: throw new IllegalArgumentException("Unknown primitive: " + internalType);
}
}
}
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