diff options
Diffstat (limited to 'third_party/java/proguard/proguard5.3.3/src/proguard/classfile/editor/InstructionAdder.java')
-rw-r--r-- | third_party/java/proguard/proguard5.3.3/src/proguard/classfile/editor/InstructionAdder.java | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/third_party/java/proguard/proguard5.3.3/src/proguard/classfile/editor/InstructionAdder.java b/third_party/java/proguard/proguard5.3.3/src/proguard/classfile/editor/InstructionAdder.java new file mode 100644 index 0000000000..5dae480b7d --- /dev/null +++ b/third_party/java/proguard/proguard5.3.3/src/proguard/classfile/editor/InstructionAdder.java @@ -0,0 +1,76 @@ +/* + * 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.classfile.editor; + +import proguard.classfile.*; +import proguard.classfile.attribute.CodeAttribute; +import proguard.classfile.instruction.*; +import proguard.classfile.instruction.visitor.InstructionVisitor; +import proguard.classfile.util.SimplifiedVisitor; + +/** + * This InstructionVisitor adds all instructions that it visits to the given + * target code attribute. + * + * @author Eric Lafortune + */ +public class InstructionAdder +extends SimplifiedVisitor +implements InstructionVisitor +{ + private final ConstantAdder constantAdder; + private final CodeAttributeComposer codeAttributeComposer; + + + /** + * Creates a new InstructionAdder that will copy classes into the given + * target code attribute. + */ + public InstructionAdder(ProgramClass targetClass, + CodeAttributeComposer targetComposer) + { + constantAdder = new ConstantAdder(targetClass); + codeAttributeComposer = targetComposer; + } + + + // Implementations for InstructionVisitor. + + + public void visitAnyInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, Instruction instruction) + { + // Add the instruction. + codeAttributeComposer.appendInstruction(offset, instruction); + } + + + public void visitConstantInstruction(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ConstantInstruction constantInstruction) + { + // Create a copy of the instruction. + Instruction newConstantInstruction = + new ConstantInstruction(constantInstruction.opcode, + constantAdder.addConstant(clazz, constantInstruction.constantIndex), + constantInstruction.constant); + + // Add the instruction. + codeAttributeComposer.appendInstruction(offset, newConstantInstruction); + } +}
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