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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
*
* 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.attribute.preverification;
import proguard.classfile.*;
import proguard.classfile.attribute.CodeAttribute;
import proguard.classfile.attribute.preverification.visitor.*;
/**
* This StackMapFrame represents an "append frame".
*
* @author Eric Lafortune
*/
public class MoreZeroFrame extends StackMapFrame
{
public int additionalVariablesCount;
public VerificationType[] additionalVariables;
/**
* Creates an uninitialized MoreZeroFrame.
*/
public MoreZeroFrame()
{
}
/**
* Creates a MoreZeroFrame with the given tag.
*/
public MoreZeroFrame(int tag)
{
additionalVariablesCount = tag + 1 - MORE_ZERO_FRAME;
}
/**
* Creates a MoreZeroFrame with the given additional variables.
*/
public MoreZeroFrame(VerificationType[] additionalVariables)
{
this(additionalVariables.length, additionalVariables);
}
/**
* Creates a MoreZeroFrame with the given additional variables.
*/
public MoreZeroFrame(int additionalVariablesCount,
VerificationType[] additionalVariables)
{
this.additionalVariablesCount = additionalVariablesCount;
this.additionalVariables = additionalVariables;
}
/**
* Applies the given verification type visitor to all variables.
*/
public void additionalVariablesAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, VerificationTypeVisitor verificationTypeVisitor)
{
for (int index = 0; index < additionalVariablesCount; index++)
{
additionalVariables[index].accept(clazz, method, codeAttribute, offset, verificationTypeVisitor);
}
}
// Implementations for StackMapFrame.
public int getTag()
{
return MORE_ZERO_FRAME + additionalVariablesCount - 1;
}
public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, StackMapFrameVisitor stackMapFrameVisitor)
{
stackMapFrameVisitor.visitMoreZeroFrame(clazz, method, codeAttribute, offset, this);
}
// Implementations for Object.
public boolean equals(Object object)
{
if (!super.equals(object))
{
return false;
}
MoreZeroFrame other = (MoreZeroFrame)object;
if (this.u2offsetDelta != other.u2offsetDelta ||
this.additionalVariablesCount != other.additionalVariablesCount)
{
return false;
}
for (int index = 0; index < additionalVariablesCount; index++)
{
VerificationType thisType = this.additionalVariables[index];
VerificationType otherType = other.additionalVariables[index];
if (!thisType.equals(otherType))
{
return false;
}
}
return true;
}
public int hashCode()
{
int hashCode = super.hashCode();
for (int index = 0; index < additionalVariablesCount; index++)
{
hashCode ^= additionalVariables[index].hashCode();
}
return hashCode;
}
public String toString()
{
StringBuffer buffer = new StringBuffer(super.toString()).append("Var: ...");
for (int index = 0; index < additionalVariablesCount; index++)
{
buffer = buffer.append('[')
.append(additionalVariables[index].toString())
.append(']');
}
buffer.append(", Stack: (empty)");
return buffer.toString();
}
}
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