diff options
Diffstat (limited to 'src/proguard/classfile/attribute/preverification/LessZeroFrame.java')
-rw-r--r-- | src/proguard/classfile/attribute/preverification/LessZeroFrame.java | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/src/proguard/classfile/attribute/preverification/LessZeroFrame.java b/src/proguard/classfile/attribute/preverification/LessZeroFrame.java new file mode 100644 index 0000000..fcc8e0a --- /dev/null +++ b/src/proguard/classfile/attribute/preverification/LessZeroFrame.java @@ -0,0 +1,103 @@ +/* + * ProGuard -- shrinking, optimization, obfuscation, and preverification + * of Java bytecode. + * + * Copyright (c) 2002-2009 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.StackMapFrameVisitor; + +/** + * This StackMapFrame represents an "chop frame". + * + * @author Eric Lafortune + */ +public class LessZeroFrame extends StackMapFrame +{ + public int choppedVariablesCount; + + + /** + * Creates an uninitialized LessZeroFrame. + */ + public LessZeroFrame() + { + } + + + /** + * Creates a LessZeroFrame with the given tag. + */ + public LessZeroFrame(int tag) + { + choppedVariablesCount = LESS_ZERO_FRAME + 3 - tag; + } + + + /** + * Creates a LessZeroFrame with the given number of chopped variables. + */ + public LessZeroFrame(byte choppedVariablesCount) + { + this.choppedVariablesCount = (int)choppedVariablesCount; + } + + + // Implementations for StackMapFrame. + + public int getTag() + { + return LESS_ZERO_FRAME + 3 - choppedVariablesCount; + } + + + public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, StackMapFrameVisitor stackMapFrameVisitor) + { + stackMapFrameVisitor.visitLessZeroFrame(clazz, method, codeAttribute, offset, this); + } + + + // Implementations for Object. + + public boolean equals(Object object) + { + if (!super.equals(object)) + { + return false; + } + + LessZeroFrame other = (LessZeroFrame)object; + + return this.u2offsetDelta == other.u2offsetDelta && + this.choppedVariablesCount != other.choppedVariablesCount; + } + + + public int hashCode() + { + return super.hashCode() ^ choppedVariablesCount; + } + + + public String toString() + { + return super.toString()+"Var: (chopped "+choppedVariablesCount+"), Stack: (empty)"; + } +} |