/*******************************************************************************
* Copyright (c) 2006, 2014 QNX Software Systems and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Doug Schaefer (QNX) - Initial API and implementation
* IBM Corporation
* Markus Schorn (Wind River Systems)
*******************************************************************************/
package org.eclipse.cdt.internal.core.pdom.dom.c;
import org.eclipse.cdt.core.CCorePlugin;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.IValue;
import org.eclipse.cdt.core.dom.ast.IVariable;
import org.eclipse.cdt.internal.core.dom.parser.IntegralValue;
import org.eclipse.cdt.internal.core.dom.parser.c.CVariableReadWriteFlags;
import org.eclipse.cdt.internal.core.index.IIndexCBindingConstants;
import org.eclipse.cdt.internal.core.pdom.db.Database;
import org.eclipse.cdt.internal.core.pdom.dom.PDOMBinding;
import org.eclipse.cdt.internal.core.pdom.dom.PDOMLinkage;
import org.eclipse.cdt.internal.core.pdom.dom.PDOMName;
import org.eclipse.cdt.internal.core.pdom.dom.PDOMNode;
import org.eclipse.core.runtime.CoreException;
/**
* Database representation for c-variables
*/
class PDOMCVariable extends PDOMBinding implements IVariable {
/**
* Offset of pointer to type information for this variable
* (relative to the beginning of the record).
*/
private static final int TYPE_OFFSET = PDOMBinding.RECORD_SIZE;
/**
* Offset of pointer to value information for this variable
* (relative to the beginning of the record).
*/
private static final int VALUE_OFFSET = TYPE_OFFSET + Database.TYPE_SIZE;
/**
* Offset of annotation information (relative to the beginning of the
* record).
*/
private static final int ANNOTATIONS = VALUE_OFFSET + Database.VALUE_SIZE;
/**
* The size in bytes of a PDOMCVariable record in the database.
*/
@SuppressWarnings("hiding")
protected static final int RECORD_SIZE = ANNOTATIONS + 1;
public PDOMCVariable(PDOMLinkage linkage, PDOMNode parent, IVariable variable) throws CoreException {
super(linkage, parent, variable.getNameCharArray());
linkage.storeType(record + TYPE_OFFSET, variable.getType());
linkage.storeValue(record + VALUE_OFFSET, variable.getInitialValue());
getDB().putByte(record + ANNOTATIONS, PDOMCAnnotations.encodeVariableAnnotations(variable));
}
@Override
public void update(final PDOMLinkage linkage, IBinding newBinding, IASTNode point) throws CoreException {
if (newBinding instanceof IVariable) {
IVariable var= (IVariable) newBinding;
linkage.storeType(record + TYPE_OFFSET, var.getType());
linkage.storeValue(record + VALUE_OFFSET, var.getInitialValue());
getDB().putByte(record + ANNOTATIONS, PDOMCAnnotations.encodeVariableAnnotations(var));
}
}
public PDOMCVariable(PDOMLinkage linkage, long record) {
super(linkage, record);
}
@Override
protected int getRecordSize() {
return RECORD_SIZE;
}
@Override
public int getNodeType() {
return IIndexCBindingConstants.CVARIABLE;
}
@Override
public IType getType() {
try {
return getLinkage().loadType(record + TYPE_OFFSET);
} catch (CoreException e) {
CCorePlugin.log(e);
return null;
}
}
@Override
public IValue getInitialValue() {
try {
return getLinkage().loadValue(record + VALUE_OFFSET);
} catch (CoreException e) {
CCorePlugin.log(e);
return IntegralValue.UNKNOWN;
}
}
@Override
public boolean isStatic() {
return PDOMCAnnotations.isStatic(getAnnotations());
}
@Override
public boolean isExtern() {
return PDOMCAnnotations.isExtern(getAnnotations());
}
@Override
public boolean isAuto() {
return PDOMCAnnotations.isAuto(getAnnotations());
}
@Override
public boolean isRegister() {
return PDOMCAnnotations.isRegister(getAnnotations());
}
private byte getAnnotations() {
return getByte(record + ANNOTATIONS);
}
@Override
public int getAdditionalNameFlags(int standardFlags, IASTName name) {
if ((standardFlags & PDOMName.IS_REFERENCE) == PDOMName.IS_REFERENCE) {
return CVariableReadWriteFlags.getReadWriteFlags(name);
}
return 0;
}
}