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-rw-r--r--src/proguard/optimize/MethodDescriptorShrinker.java350
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diff --git a/src/proguard/optimize/MethodDescriptorShrinker.java b/src/proguard/optimize/MethodDescriptorShrinker.java
deleted file mode 100644
index f5f52b0..0000000
--- a/src/proguard/optimize/MethodDescriptorShrinker.java
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@@ -1,350 +0,0 @@
-/*
- * 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.optimize;
-
-import proguard.classfile.*;
-import proguard.classfile.attribute.*;
-import proguard.classfile.attribute.annotation.*;
-import proguard.classfile.attribute.visitor.AttributeVisitor;
-import proguard.classfile.editor.ConstantPoolEditor;
-import proguard.classfile.util.*;
-import proguard.classfile.visitor.MemberVisitor;
-import proguard.optimize.info.*;
-import proguard.optimize.peephole.VariableShrinker;
-
-import java.util.Arrays;
-
-/**
- * This MemberVisitor removes unused parameters in the descriptors of the
- * methods that it visits.
- *
- * @see ParameterUsageMarker
- * @see VariableUsageMarker
- * @see VariableShrinker
- * @author Eric Lafortune
- */
-public class MethodDescriptorShrinker
-extends SimplifiedVisitor
-implements MemberVisitor,
- AttributeVisitor
-{
- private static final boolean DEBUG = false;
-
-
- private final MemberVisitor extraMemberVisitor;
-
-
- /**
- * Creates a new MethodDescriptorShrinker.
- */
- public MethodDescriptorShrinker()
- {
- this(null);
- }
-
-
- /**
- * Creates a new MethodDescriptorShrinker with an extra visitor.
- * @param extraMemberVisitor an optional extra visitor for all methods whose
- * parameters have been simplified.
- */
- public MethodDescriptorShrinker(MemberVisitor extraMemberVisitor)
- {
- this.extraMemberVisitor = extraMemberVisitor;
- }
-
-
- // Implementations for MemberVisitor.
-
- public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
- {
- if (DEBUG)
- {
- System.out.println("MethodDescriptorShrinker: ["+programClass.getName()+"."+programMethod.getName(programClass)+programMethod.getDescriptor(programClass)+"]");
- }
-
- // Update the descriptor if it has any unused parameters.
- String descriptor = programMethod.getDescriptor(programClass);
- String newDescriptor = shrinkDescriptor(programMethod, descriptor);
-
- if (!newDescriptor.equals(descriptor))
- {
- String name = programMethod.getName(programClass);
- String newName = name;
-
- // Append a code, if the method isn't a class instance initializer.
- if (!name.equals(ClassConstants.METHOD_NAME_INIT))
- {
- newName += ClassConstants.SPECIAL_MEMBER_SEPARATOR + Long.toHexString(Math.abs((descriptor).hashCode()));
- }
-
- ConstantPoolEditor constantPoolEditor =
- new ConstantPoolEditor(programClass);
-
- // Update the name, if necessary.
- if (!newName.equals(name))
- {
- programMethod.u2nameIndex =
- constantPoolEditor.addUtf8Constant(newName);
- }
-
- // Update the referenced classes.
- programMethod.referencedClasses =
- shrinkReferencedClasses(programMethod,
- descriptor,
- programMethod.referencedClasses);
-
- // Finally, update the descriptor itself.
- programMethod.u2descriptorIndex =
- constantPoolEditor.addUtf8Constant(newDescriptor);
-
- if (DEBUG)
- {
- System.out.println(" -> ["+newName+newDescriptor+"]");
- }
-
- // Shrink the signature and parameter annotations.
- programMethod.attributesAccept(programClass, this);
-
- // Visit the method, if required.
- if (extraMemberVisitor != null)
- {
- extraMemberVisitor.visitProgramMethod(programClass, programMethod);
- }
- }
- }
-
-
- // Implementations for AttributeVisitor.
-
- public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
-
-
- public void visitSignatureAttribute(Clazz clazz, Method method, SignatureAttribute signatureAttribute)
- {
- if (DEBUG)
- {
- System.out.println(" ["+signatureAttribute.getSignature(clazz)+"]");
- }
-
- // Compute the new signature.
- String signature = signatureAttribute.getSignature(clazz);
- String newSignature = shrinkDescriptor(method, signature);
-
- if (!newSignature.equals(signature))
- {
- // Update the signature.
- signatureAttribute.u2signatureIndex =
- new ConstantPoolEditor((ProgramClass)clazz).addUtf8Constant(newSignature);
-
- // Update the referenced classes.
- signatureAttribute.referencedClasses =
- shrinkReferencedClasses(method,
- signature,
- signatureAttribute.referencedClasses);
-
- if (DEBUG)
- {
- System.out.println(" -> ["+newSignature+"]");
- }
- }
- }
-
-
- public void visitAnyParameterAnnotationsAttribute(Clazz clazz, Method method, ParameterAnnotationsAttribute parameterAnnotationsAttribute)
- {
- int[] annotationsCounts = parameterAnnotationsAttribute.u2parameterAnnotationsCount;
- Annotation[][] annotations = parameterAnnotationsAttribute.parameterAnnotations;
-
- // All parameters of non-static methods are shifted by one in the local
- // variable frame.
- int parameterIndex =
- (method.getAccessFlags() & ClassConstants.ACC_STATIC) != 0 ?
- 0 : 1;
-
- int annotationIndex = 0;
- int newAnnotationIndex = 0;
-
- // Go over the parameters.
- String descriptor = method.getDescriptor(clazz);
- InternalTypeEnumeration internalTypeEnumeration =
- new InternalTypeEnumeration(descriptor);
-
- while (internalTypeEnumeration.hasMoreTypes())
- {
- String type = internalTypeEnumeration.nextType();
- if (ParameterUsageMarker.isParameterUsed(method, parameterIndex))
- {
- annotationsCounts[newAnnotationIndex] = annotationsCounts[annotationIndex];
- annotations[newAnnotationIndex++] = annotations[annotationIndex];
- }
-
- annotationIndex++;
-
- parameterIndex += ClassUtil.isInternalCategory2Type(type) ? 2 : 1;
- }
-
- // Update the number of parameters.
- parameterAnnotationsAttribute.u1parametersCount = newAnnotationIndex;
-
- // Clear the unused entries.
- while (newAnnotationIndex < annotationIndex)
- {
- annotationsCounts[newAnnotationIndex] = 0;
- annotations[newAnnotationIndex++] = null;
- }
- }
-
-
- // Small utility methods.
-
- /**
- * Returns a shrunk descriptor or signature of the given method.
- */
- private String shrinkDescriptor(Method method, String descriptor)
- {
- // All parameters of non-static methods are shifted by one in the local
- // variable frame.
- int parameterIndex =
- (method.getAccessFlags() & ClassConstants.ACC_STATIC) != 0 ?
- 0 : 1;
-
- InternalTypeEnumeration internalTypeEnumeration =
- new InternalTypeEnumeration(descriptor);
-
- StringBuffer newDescriptorBuffer =
- new StringBuffer(descriptor.length());
-
- // Copy the formal type parameters.
- newDescriptorBuffer.append(internalTypeEnumeration.formalTypeParameters());
- newDescriptorBuffer.append(ClassConstants.METHOD_ARGUMENTS_OPEN);
-
- // Go over the parameters.
- while (internalTypeEnumeration.hasMoreTypes())
- {
- String type = internalTypeEnumeration.nextType();
- if (ParameterUsageMarker.isParameterUsed(method, parameterIndex))
- {
- newDescriptorBuffer.append(type);
- }
- else if (DEBUG)
- {
- System.out.println(" Deleting parameter #"+parameterIndex+" ["+type+"]");
- }
-
- parameterIndex += ClassUtil.isInternalCategory2Type(type) ? 2 : 1;
- }
-
- // Copy the return type.
- newDescriptorBuffer.append(ClassConstants.METHOD_ARGUMENTS_CLOSE);
- newDescriptorBuffer.append(internalTypeEnumeration.returnType());
-
- return newDescriptorBuffer.toString();
- }
-
-
- /**
- * Shrinks the array of referenced classes of the given method.
- */
- private Clazz[] shrinkReferencedClasses(Method method,
- String descriptor,
- Clazz[] referencedClasses)
- {
- if (referencedClasses != null)
- {
- // All parameters of non-static methods are shifted by one in the local
- // variable frame.
- int parameterIndex =
- (method.getAccessFlags() & ClassConstants.ACC_STATIC) != 0 ?
- 0 : 1;
-
- InternalTypeEnumeration internalTypeEnumeration =
- new InternalTypeEnumeration(descriptor);
-
- int referencedClassIndex = 0;
- int newReferencedClassIndex = 0;
-
- // Copy the formal type parameters.
- {
- String type = internalTypeEnumeration.formalTypeParameters();
- int count = new DescriptorClassEnumeration(type).classCount();
- for (int counter = 0; counter < count; counter++)
- {
- referencedClasses[newReferencedClassIndex++] =
- referencedClasses[referencedClassIndex++];
- }
- }
-
- // Go over the parameters.
- while (internalTypeEnumeration.hasMoreTypes())
- {
- // Consider the classes referenced by this parameter type.
- String type = internalTypeEnumeration.nextType();
- int count = new DescriptorClassEnumeration(type).classCount();
-
- if (ParameterUsageMarker.isParameterUsed(method, parameterIndex))
- {
- // Copy the referenced classes.
- for (int counter = 0; counter < count; counter++)
- {
- referencedClasses[newReferencedClassIndex++] =
- referencedClasses[referencedClassIndex++];
- }
- }
- else
- {
- // Skip the referenced classes.
- referencedClassIndex += count;
- }
-
- parameterIndex += ClassUtil.isInternalCategory2Type(type) ? 2 : 1;
- }
-
- // Copy the return type.
- {
- String type = internalTypeEnumeration.returnType();
- int count = new DescriptorClassEnumeration(type).classCount();
- for (int counter = 0; counter < count; counter++)
- {
- referencedClasses[newReferencedClassIndex++] =
- referencedClasses[referencedClassIndex++];
- }
- }
-
- // Shrink the array to the proper size.
- if (newReferencedClassIndex == 0)
- {
- referencedClasses = null;
- }
- else if (newReferencedClassIndex < referencedClassIndex)
- {
- Clazz[] newReferencedClasses = new Clazz[newReferencedClassIndex];
- System.arraycopy(referencedClasses, 0,
- newReferencedClasses, 0,
- newReferencedClassIndex);
-
- referencedClasses = newReferencedClasses;
- }
- }
-
- return referencedClasses;
- }
-}
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