mirror of
https://github.com/i-net-software/JWebAssembly.git
synced 2025-03-15 02:44:47 +01:00
add getPosition() to LocalVariable
This commit is contained in:
Volker Berlin
parent
14dc89aacb
commit
68aaa5c589
@ -1,93 +1,103 @@
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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 LocalVariable {
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private int start_pc;
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private int length;
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private int name_index;
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private int descriptor_index;
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private int index;
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private boolean declared;
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protected LocalVariable() {
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// nothing
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}
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/**
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* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.13
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* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#5956
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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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*/
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LocalVariable( DataInputStream input ) throws IOException {
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start_pc = input.readUnsignedShort();
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length = input.readUnsignedShort();
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name_index = input.readUnsignedShort();
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descriptor_index = input.readUnsignedShort();
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index = input.readUnsignedShort();
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}
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/**
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* Get the index in the local variable table.
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* @return the index.
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*/
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public int getIndex() {
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return index;
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}
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/**
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* Get the name of the variable
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* @param constantPool ConstantPool of the current class
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*/
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public String getName( ConstantPool constantPool ) {
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return (String)constantPool.get( name_index );
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}
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public int getDescriptorIdx() {
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return descriptor_index;
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}
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/**
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* Was the declaration printed?
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* @return true if already declared
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*/
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public boolean isDeclared() {
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return declared;
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}
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/**
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* Mark this variable as declared.
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*/
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public void setDeclared() {
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declared = true;
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}
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}
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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 LocalVariable {
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private int start_pc;
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private int length;
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private int name_index;
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private int descriptor_index;
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private int index;
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private int position;
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private boolean declared;
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/**
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* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.13
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* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#5956
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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 I/O error occurs.
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*/
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LocalVariable( DataInputStream input, int position ) throws IOException {
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start_pc = input.readUnsignedShort();
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length = input.readUnsignedShort();
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name_index = input.readUnsignedShort();
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descriptor_index = input.readUnsignedShort();
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index = input.readUnsignedShort();
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this.position = position;
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}
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/**
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* Get the index in the local variable table (memory location/slot).
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*
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* @return the index.
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*/
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public int getIndex() {
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return index;
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}
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/**
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* Get the position in the local variable table.
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*
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* @return the position
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*/
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public int getPosition() {
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return position;
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}
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/**
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* Get the name of the variable
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* @param constantPool ConstantPool of the current class
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*/
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public String getName( ConstantPool constantPool ) {
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return (String)constantPool.get( name_index );
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}
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public int getDescriptorIdx() {
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return descriptor_index;
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}
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/**
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* Was the declaration printed?
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* @return true if already declared
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*/
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public boolean isDeclared() {
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return declared;
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}
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/**
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* Mark this variable as declared.
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*/
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public void setDeclared() {
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declared = true;
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}
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}
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@ -1,126 +1,128 @@
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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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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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/**
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* @author Volker Berlin
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*/
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public class LocalVariableTable {
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private LocalVariable[] tablePosition;
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private LocalVariable[] table;
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private int count;
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/**
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* @param maxLocals the count of local variables in the memory
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*/
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LocalVariableTable( int maxLocals ) {
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table = new LocalVariable[maxLocals];
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tablePosition = new LocalVariable[maxLocals];
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}
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/**
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* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.13
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* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#5956
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*
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* @param input
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* the stream of the class
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* @param withPositions a hack if we find a better solution to map the positions LocalVariableTypeTable
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* @throws IOException
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*/
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void read( DataInputStream input, boolean withPositions ) throws IOException {
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count = input.readUnsignedShort();
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if( count > table.length ) {
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table = new LocalVariable[count];
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tablePosition = new LocalVariable[count];
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}
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for( int i = 0; i < count; i++ ) {
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LocalVariable var = new LocalVariable( input );
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int idx = var.getIndex();
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if( withPositions ) {
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tablePosition[i] = var;
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}
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table[idx] = var;
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}
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}
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/**
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* Get the count of variables.
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* @return the count
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*/
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public int getPositionSize() {
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return count;
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}
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/**
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* Get the count of storage places a 4 bytes for local variables. Double and long variables need 2 of this places.
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*
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* @return the local stack size
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*/
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public int getSize() {
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return table.length;
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}
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/**
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* Get the LocalVariable with it position. The position is continue also with double and long variables. Or if a variable is reused from a other block.
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*
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* @param pos
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* the position
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*/
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@Nonnull
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public LocalVariable getPosition( int pos ) {
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return tablePosition[pos];
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}
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/**
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* Get the LocalVariable with its memory location. The index has empty places with double and long variables.
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*
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* @param idx
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* the index in the memory
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*/
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@Nonnull
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public LocalVariable get( int idx ) {
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return table[idx];
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}
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/**
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* Find a LocalVariable with a given name.
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*
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* @param name
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* needed for evaluate the name.
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* @param constantPool
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* current constant pool
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* @return the LocalVariable or null
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*/
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@Nullable
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public LocalVariable get( String name, ConstantPool constantPool ) {
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for( int i=0; i<table.length; i++ ){
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if( name.equals( table[i].getName( constantPool ) )) {
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return table[i];
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}
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}
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return null;
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}
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}
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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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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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/**
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* @author Volker Berlin
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*/
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public class LocalVariableTable {
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private LocalVariable[] tablePosition;
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private LocalVariable[] table;
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private int count;
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/**
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* @param maxLocals the count of local variables in the memory
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*/
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LocalVariableTable( int maxLocals ) {
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table = new LocalVariable[maxLocals];
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tablePosition = new LocalVariable[maxLocals];
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}
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/**
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* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.13
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* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#5956
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*
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* @param input
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* the stream of the class
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* @param withPositions
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* a hack if we find a better solution to map the positions LocalVariableTypeTable
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* @throws IOException
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* if any I/O error occurs.
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*/
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void read( DataInputStream input, boolean withPositions ) throws IOException {
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count = input.readUnsignedShort();
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if( count > table.length ) {
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table = new LocalVariable[count];
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tablePosition = new LocalVariable[count];
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}
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for( int i = 0; i < count; i++ ) {
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LocalVariable var = new LocalVariable( input, i );
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int idx = var.getIndex();
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if( withPositions ) {
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tablePosition[i] = var;
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}
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table[idx] = var;
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}
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}
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/**
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* Get the count of variables.
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* @return the count
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*/
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public int getPositionSize() {
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return count;
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}
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/**
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* Get the count of storage places a 4 bytes for local variables. Double and long variables need 2 of this places.
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*
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* @return the local stack size
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*/
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public int getSize() {
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return table.length;
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}
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/**
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* Get the LocalVariable with it position. The position is continue also with double and long variables. Or if a variable is reused from a other block.
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*
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* @param pos
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* the position
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*/
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@Nonnull
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public LocalVariable getPosition( int pos ) {
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return tablePosition[pos];
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}
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/**
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* Get the LocalVariable with its memory location (slot). The index has empty places with double and long variables.
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*
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* @param idx
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* the index in the memory
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*/
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@Nonnull
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public LocalVariable get( int idx ) {
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return table[idx];
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}
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/**
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* Find a LocalVariable with a given name.
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*
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* @param name
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* needed for evaluate the name.
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* @param constantPool
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* current constant pool
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* @return the LocalVariable or null
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*/
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@Nullable
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public LocalVariable get( String name, ConstantPool constantPool ) {
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for( int i=0; i<table.length; i++ ){
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if( name.equals( table[i].getName( constantPool ) )) {
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return table[i];
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}
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}
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return null;
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}
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}
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