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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 a "same locals 1 stack item frame" or a
* "same locals 1 stack item frame extended".
*
* @author Eric Lafortune
*/
public class SameOneFrame extends StackMapFrame
{
public VerificationType stackItem;
/**
* Creates an uninitialized SameOneFrame.
*/
public SameOneFrame()
{
}
/**
* Creates a SameOneFrame with the given tag.
*/
public SameOneFrame(int tag)
{
u2offsetDelta = tag - SAME_ONE_FRAME;
}
/**
* Creates a SameOneFrame with the given stack verification type.
*/
public SameOneFrame(VerificationType stackItem)
{
this.stackItem = stackItem;
}
/**
* Applies the given verification type visitor to the stack item.
*/
public void stackItemAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, VerificationTypeVisitor verificationTypeVisitor)
{
stackItem.accept(clazz, method, codeAttribute, offset, verificationTypeVisitor);
}
// Implementations for StackMapFrame.
public int getTag()
{
return u2offsetDelta < 64 ?
SAME_ONE_FRAME + u2offsetDelta :
SAME_ONE_FRAME_EXTENDED;
}
public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, StackMapFrameVisitor stackMapFrameVisitor)
{
stackMapFrameVisitor.visitSameOneFrame(clazz, method, codeAttribute, offset, this);
}
// Implementations for Object.
public boolean equals(Object object)
{
if (!super.equals(object))
{
return false;
}
SameOneFrame other = (SameOneFrame)object;
return this.u2offsetDelta == other.u2offsetDelta &&
this.stackItem.equals(other.stackItem);
}
public int hashCode()
{
return super.hashCode() ^ stackItem.hashCode();
}
public String toString()
{
return super.toString()+"Var: ..., Stack: ["+stackItem.toString()+"]";
}
}
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