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/*******************************************************************************
* Copyright (c) 2008, 2009 Wind River Systems, Inc. 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:
* Markus Schorn - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.core.pdom.dom.cpp;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.internal.core.pdom.db.Database;
import org.eclipse.cdt.internal.core.pdom.dom.PDOMLinkage;
import org.eclipse.cdt.internal.core.pdom.dom.PDOMNode;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.CoreException;
/**
* Stores a list of types
*/
class PDOMCPPTypeList {
protected static final int NODE_SIZE = 4;
/**
* Stores the given types in the database.
* @return the record by which the types can be referenced.
*/
public static long putTypes(PDOMNode parent, IType[] types) throws CoreException {
if (types == null)
return 0;
final PDOMLinkage linkage= parent.getLinkage();
final Database db= linkage.getDB();
final short len = (short)Math.min(types.length, (Database.MAX_MALLOC_SIZE-2)/NODE_SIZE);
final long block = db.malloc(2+ NODE_SIZE*len);
long p = block;
db.putShort(p, len); p+=2;
for (int i=0; i<len; i++, p+=NODE_SIZE) {
final IType type = types[i];
long rec= 0;
if (type != null) {
final PDOMNode pdomType = linkage.addType(parent, type);
if (pdomType != null) {
rec= pdomType.getRecord();
}
}
db.putRecPtr(p, rec);
}
return block;
}
public static IType[] getTypes(PDOMNode parent, long rec) throws CoreException {
if (rec == 0)
return null;
final PDOMLinkage linkage= parent.getLinkage();
final Database db= linkage.getDB();
final short len = db.getShort(rec);
if (len == 0)
return IType.EMPTY_TYPE_ARRAY;
Assert.isTrue(len >= 0 && len <= (Database.MAX_MALLOC_SIZE-2)/NODE_SIZE);
rec+=2;
IType[] result= new IType[len];
for (int i=0; i<len; i++, rec+=NODE_SIZE) {
final long typeRec= db.getRecPtr(rec);
if (typeRec != 0)
result[i]= (IType)linkage.getNode(typeRec);
}
return result;
}
/**
* Restores an array of template arguments from the database.
*/
public static void clearTypes(PDOMNode parent, final long record) throws CoreException {
if (record == 0)
return;
final PDOMLinkage linkage= parent.getLinkage();
final Database db= linkage.getDB();
final short len= db.getShort(record);
Assert.isTrue(len >= 0 && len <= (Database.MAX_MALLOC_SIZE-2)/NODE_SIZE);
long p= record+2;
for (int i=0; i<len; i++, p+=NODE_SIZE) {
final long typeRec= db.getRecPtr(p);
final IType t= (IType) linkage.getNode(typeRec);
linkage.deleteType(t, parent.getRecord());
}
db.free(record);
}
}
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