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https://github.com/i-net-software/JWebAssembly.git
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handle MODULE and PACKAGE constant on the pool (module-info.class)
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Volker Berlin
parent
e0659a7033
commit
833cd8c80a
@ -1,124 +1,135 @@
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/*
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Copyright 2011 - 2017 Volker Berlin (i-net software)
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package de.inetsoftware.classparser;
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import java.io.DataInputStream;
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import java.io.IOException;
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/**
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* @author Volker Berlin
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*/
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public class ConstantPool {
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private final Object[] constantPool;
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/**
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* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.4
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* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#20080
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*
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* @param input
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* the stream of the class
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* @throws IOException
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* if any IO error occur
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*/
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ConstantPool( DataInputStream input ) throws IOException {
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int count = input.readUnsignedShort();
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Object[] pool = constantPool = new Object[count];
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for( int i = 1; i < count; i++ ) {
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byte type = input.readByte();
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switch( type ) {
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case 1: //CONSTANT_Utf8
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pool[i] = input.readUTF();
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break;
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case 3: //CONSTANT_Integer
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pool[i] = new Integer( input.readInt() );
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break;
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case 4: //CONSTANT_Float
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pool[i] = new Float( input.readFloat() );
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break;
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case 5: //CONSTANT_Long
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pool[i] = new Long( input.readLong() );
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i++;
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break;
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case 6: //CONSTANT_Double
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pool[i] = new Double( input.readDouble() );
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i++;
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break;
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case 7: //CONSTANT_Class
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case 8: //CONSTANT_String
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pool[i] = new int[] { type, input.readUnsignedShort() };
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break;
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case 9: //CONSTANT_Fieldref
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case 10: //CONSTANT_Methodref
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case 11: //CONSTANT_InterfaceMethodref
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case 12: //CONSTANT_NameAndType
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pool[i] = new int[] { type, input.readUnsignedShort(), input.readUnsignedShort() };
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break;
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default:
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throw new IOException( "Unknown constant pool type: " + type );
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}
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}
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boolean repeat;
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do {
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repeat = false;
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for( int i = 0; i < count; i++ ) {
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if( pool[i] instanceof int[] ) {
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int[] data = (int[])pool[i];
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switch( data[0] ) {
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case 7: //CONSTANT_Class
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pool[i] = new ConstantClass( (String)pool[data[1]] );
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break;
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case 8: //CONSTANT_String
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pool[i] = pool[data[1]];
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break;
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case 9: //CONSTANT_Fieldref
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if( pool[data[1]] instanceof int[] || pool[data[2]] instanceof int[] ) {
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repeat = true;
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} else {
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pool[i] = new ConstantFieldRef( (ConstantClass)pool[data[1]], (ConstantNameAndType)pool[data[2]] );
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}
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break;
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case 10: //CONSTANT_Methodref
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if( pool[data[1]] instanceof int[] || pool[data[2]] instanceof int[] ) {
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repeat = true;
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} else {
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pool[i] = new ConstantMethodRef( (ConstantClass)pool[data[1]], (ConstantNameAndType)pool[data[2]] );
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}
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break;
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case 11: //CONSTANT_InterfaceMethodref
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if( pool[data[1]] instanceof int[] || pool[data[2]] instanceof int[] ) {
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repeat = true;
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} else {
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pool[i] = new ConstantInterfaceRef( (ConstantClass)pool[data[1]], (ConstantNameAndType)pool[data[2]] );
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}
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break;
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case 12: //CONSTANT_NameAndType
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pool[i] = new ConstantNameAndType( (String)pool[data[1]], (String)pool[data[2]] );
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break;
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default:
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throw new IOException( "Unknown constant pool type: " + data[0] );
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}
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}
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}
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} while( repeat );
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}
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public Object get( int index ) {
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return constantPool[index];
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}
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}
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/*
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Copyright 2011 - 2019 Volker Berlin (i-net software)
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package de.inetsoftware.classparser;
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import java.io.DataInputStream;
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import java.io.IOException;
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/**
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* @author Volker Berlin
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*/
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public class ConstantPool {
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private final Object[] constantPool;
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/**
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* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.4
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* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#20080
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*
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* @param input
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* the stream of the class
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* @throws IOException
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* if any IO error occur
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*/
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ConstantPool( DataInputStream input ) throws IOException {
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int count = input.readUnsignedShort();
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Object[] pool = constantPool = new Object[count];
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for( int i = 1; i < count; i++ ) {
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byte type = input.readByte();
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switch( type ) {
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case 1: //CONSTANT_Utf8
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pool[i] = input.readUTF();
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break;
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case 3: //CONSTANT_Integer
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pool[i] = new Integer( input.readInt() );
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break;
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case 4: //CONSTANT_Float
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pool[i] = new Float( input.readFloat() );
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break;
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case 5: //CONSTANT_Long
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pool[i] = new Long( input.readLong() );
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i++;
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break;
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case 6: //CONSTANT_Double
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pool[i] = new Double( input.readDouble() );
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i++;
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break;
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case 7: //CONSTANT_Class
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case 8: //CONSTANT_String
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case 19: // CONSTANT_Module
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case 20: // CONSTANT_Package
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pool[i] = new int[] { type, input.readUnsignedShort() };
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break;
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case 9: //CONSTANT_Fieldref
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case 10: //CONSTANT_Methodref
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case 11: //CONSTANT_InterfaceMethodref
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case 12: //CONSTANT_NameAndType
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pool[i] = new int[] { type, input.readUnsignedShort(), input.readUnsignedShort() };
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break;
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default:
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throw new IOException( "Unknown constant pool type: " + type );
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}
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}
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boolean repeat;
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do {
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repeat = false;
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for( int i = 0; i < count; i++ ) {
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if( pool[i] instanceof int[] ) {
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int[] data = (int[])pool[i];
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switch( data[0] ) {
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case 7: //CONSTANT_Class
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pool[i] = new ConstantClass( (String)pool[data[1]] );
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break;
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case 8: //CONSTANT_String
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case 19: // CONSTANT_Module
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case 20: // CONSTANT_Package
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pool[i] = pool[data[1]];
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break;
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case 9: //CONSTANT_Fieldref
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if( pool[data[1]] instanceof int[] || pool[data[2]] instanceof int[] ) {
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repeat = true;
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} else {
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pool[i] = new ConstantFieldRef( (ConstantClass)pool[data[1]], (ConstantNameAndType)pool[data[2]] );
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}
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break;
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case 10: //CONSTANT_Methodref
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if( pool[data[1]] instanceof int[] || pool[data[2]] instanceof int[] ) {
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repeat = true;
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} else {
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pool[i] = new ConstantMethodRef( (ConstantClass)pool[data[1]], (ConstantNameAndType)pool[data[2]] );
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}
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break;
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case 11: //CONSTANT_InterfaceMethodref
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if( pool[data[1]] instanceof int[] || pool[data[2]] instanceof int[] ) {
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repeat = true;
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} else {
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pool[i] = new ConstantInterfaceRef( (ConstantClass)pool[data[1]], (ConstantNameAndType)pool[data[2]] );
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}
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break;
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case 12: //CONSTANT_NameAndType
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pool[i] = new ConstantNameAndType( (String)pool[data[1]], (String)pool[data[2]] );
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break;
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default:
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throw new IOException( "Unknown constant pool type: " + data[0] );
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}
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}
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}
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} while( repeat );
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}
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/**
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* Get a object from the pool at the given index.
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*
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* @param index
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* the index
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* @return the object
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*/
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public Object get( int index ) {
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return constantPool[index];
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}
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}
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