diff options
Diffstat (limited to 'third_party/java/proguard/proguard5.3.3/src/proguard/optimize/MethodStaticizer.java')
-rw-r--r-- | third_party/java/proguard/proguard5.3.3/src/proguard/optimize/MethodStaticizer.java | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/third_party/java/proguard/proguard5.3.3/src/proguard/optimize/MethodStaticizer.java b/third_party/java/proguard/proguard5.3.3/src/proguard/optimize/MethodStaticizer.java new file mode 100644 index 0000000000..0d87e6255f --- /dev/null +++ b/third_party/java/proguard/proguard5.3.3/src/proguard/optimize/MethodStaticizer.java @@ -0,0 +1,87 @@ +/* + * ProGuard -- shrinking, optimization, obfuscation, and preverification + * of Java bytecode. + * + * Copyright (c) 2002-2017 Eric Lafortune @ GuardSquare + * + * 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.visitor.AttributeVisitor; +import proguard.classfile.editor.MethodInvocationFixer; +import proguard.classfile.util.SimplifiedVisitor; +import proguard.classfile.visitor.MemberVisitor; +import proguard.optimize.info.ParameterUsageMarker; +import proguard.optimize.peephole.VariableShrinker; + +/** + * This MemberVisitor makes all methods that it visits static, if their 'this' + * parameters are unused. + * + * @see ParameterUsageMarker + * @see MethodInvocationFixer + * @see VariableShrinker + * @author Eric Lafortune + */ +public class MethodStaticizer +extends SimplifiedVisitor +implements MemberVisitor, + AttributeVisitor +{ + private final MemberVisitor extraStaticMemberVisitor; + + + /** + * Creates a new MethodStaticizer. + */ + public MethodStaticizer() + { + this(null); + } + + + /** + * Creates a new MethodStaticizer with an extra visitor. + * @param extraStaticMemberVisitor an optional extra visitor for all + * methods that have been made static. + */ + public MethodStaticizer(MemberVisitor extraStaticMemberVisitor) + { + this.extraStaticMemberVisitor = extraStaticMemberVisitor; + } + + + // Implementations for MemberVisitor. + + public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod) + { + // Is the 'this' parameter being used? + if (!ParameterUsageMarker.isParameterUsed(programMethod, 0)) + { + // Make the method static. + programMethod.u2accessFlags = + (programMethod.getAccessFlags() & ~ClassConstants.ACC_FINAL) | + ClassConstants.ACC_STATIC; + + // Visit the method, if required. + if (extraStaticMemberVisitor != null) + { + extraStaticMemberVisitor.visitProgramMethod(programClass, programMethod); + } + } + } +} |