diff options
Diffstat (limited to 'src/proguard/classfile/attribute/preverification/MoreZeroFrame.java')
-rw-r--r-- | src/proguard/classfile/attribute/preverification/MoreZeroFrame.java | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/proguard/classfile/attribute/preverification/MoreZeroFrame.java b/src/proguard/classfile/attribute/preverification/MoreZeroFrame.java new file mode 100644 index 0000000..881f188 --- /dev/null +++ b/src/proguard/classfile/attribute/preverification/MoreZeroFrame.java @@ -0,0 +1,161 @@ +/* + * 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.*; + +/** + * 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(); + } +} |