Mercurial > hg > openjdk > jdk9 > jaxp
view src/java.xml/share/classes/com/sun/org/apache/bcel/internal/generic/IINC.java @ 1113:2fdbfbde3bc0
8162572: Update License Header for all JAXP sources
Reviewed-by: lancea
author | joehw |
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date | Mon, 17 Apr 2017 16:24:10 -0700 |
parents | 2bfaf29cc90b |
children |
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/* * reserved comment block * DO NOT REMOVE OR ALTER! */ /* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.sun.org.apache.bcel.internal.generic; import java.io.*; import com.sun.org.apache.bcel.internal.util.ByteSequence; /** * IINC - Increment local variable by constant * * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> */ public class IINC extends LocalVariableInstruction { private boolean wide; private int c; /** * Empty constructor needed for the Class.newInstance() statement in * Instruction.readInstruction(). Not to be used otherwise. */ IINC() {} /** * @param n index of local variable * @param c increment factor */ public IINC(int n, int c) { super(); // Default behaviour of LocalVariableInstruction causes error this.opcode = com.sun.org.apache.bcel.internal.Constants.IINC; this.length = (short)3; setIndex(n); // May set wide as side effect setIncrement(c); } /** * Dump instruction as byte code to stream out. * @param out Output stream */ public void dump(DataOutputStream out) throws IOException { if(wide) // Need WIDE prefix ? out.writeByte(com.sun.org.apache.bcel.internal.Constants.WIDE); out.writeByte(opcode); if(wide) { out.writeShort(n); out.writeShort(c); } else { out.writeByte(n); out.writeByte(c); } } private final void setWide() { if(wide = ((n > com.sun.org.apache.bcel.internal.Constants.MAX_SHORT) || (Math.abs(c) > Byte.MAX_VALUE))) length = 6; // wide byte included else length = 3; } /** * Read needed data (e.g. index) from file. */ protected void initFromFile(ByteSequence bytes, boolean wide) throws IOException { this.wide = wide; if(wide) { length = 6; n = bytes.readUnsignedShort(); c = bytes.readShort(); } else { length = 3; n = bytes.readUnsignedByte(); c = bytes.readByte(); } } /** * @return mnemonic for instruction */ public String toString(boolean verbose) { return super.toString(verbose) + " " + c; } /** * Set index of local variable. */ public final void setIndex(int n) { if(n < 0) throw new ClassGenException("Negative index value: " + n); this.n = n; setWide(); } /** * @return increment factor */ public final int getIncrement() { return c; } /** * Set increment factor. */ public final void setIncrement(int c) { this.c = c; setWide(); } /** @return int type */ public Type getType(ConstantPoolGen cp) { return Type.INT; } /** * Call corresponding visitor method(s). The order is: * Call visitor methods of implemented interfaces first, then * call methods according to the class hierarchy in descending order, * i.e., the most specific visitXXX() call comes last. * * @param v Visitor object */ public void accept(Visitor v) { v.visitLocalVariableInstruction(this); v.visitIINC(this); } }