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/*******************************************************************************
* Copyright (c) 2007, 2009 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:
* Bryan Wilkinson (QNX) - Initial API and implementation
* Andrew Ferguson (Symbian)
* Markus Schorn (Wind River Systems)
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.core.pdom.dom.cpp;
import java.util.ArrayList;
import org.eclipse.cdt.core.CCorePlugin;
import org.eclipse.cdt.core.dom.ast.ASTTypeUtil;
import org.eclipse.cdt.core.dom.ast.DOMException;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.ITypedef;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPClassSpecialization;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPClassTemplate;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPClassTemplatePartialSpecialization;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPClassType;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateArgument;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateInstance;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateNonTypeParameter;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateParameter;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateTemplateParameter;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateTypeParameter;
import org.eclipse.cdt.core.parser.util.CharArrayUtils;
import org.eclipse.cdt.internal.core.dom.parser.ProblemBinding;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPDeferredClassInstance;
import org.eclipse.cdt.internal.core.dom.parser.cpp.ICPPDeferredClassInstance;
import org.eclipse.cdt.internal.core.dom.parser.cpp.ICPPInstanceCache;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.CPPTemplates;
import org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.SemanticUtil;
import org.eclipse.cdt.internal.core.index.IIndexCPPBindingConstants;
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.CoreException;
/**
* Implementation for class templates in the index, base class for partial specializations.
*/
public class PDOMCPPClassTemplate extends PDOMCPPClassType
implements ICPPClassTemplate, ICPPInstanceCache, IPDOMCPPTemplateParameterOwner {
private static final int PARAMETERS = PDOMCPPClassType.RECORD_SIZE + 0;
private static final short RELEVANT_PARAMETERS= PDOMCPPClassType.RECORD_SIZE + 4;
private static final int FIRST_PARTIAL = PDOMCPPClassType.RECORD_SIZE + 6;
/**
* The size in bytes of a PDOMCPPClassTemplate record in the database.
*/
@SuppressWarnings("hiding")
protected static final int RECORD_SIZE = PDOMCPPClassType.RECORD_SIZE + 10;
private ICPPTemplateParameter[] params; // Cached template parameters.
public PDOMCPPClassTemplate(PDOMCPPLinkage linkage, PDOMNode parent, ICPPClassTemplate template) throws CoreException, DOMException {
super(linkage, parent, template);
final Database db = getDB();
final ICPPTemplateParameter[] origParams= template.getTemplateParameters();
final IPDOMCPPTemplateParameter[] params = PDOMTemplateParameterArray.createPDOMTemplateParameters(linkage, this, origParams);
long rec= PDOMTemplateParameterArray.putArray(db, params);
db.putRecPtr(record + PARAMETERS, rec);
db.putShort(record + RELEVANT_PARAMETERS, (short) params.length);
linkage.new ConfigureTemplateParameters(origParams, params);
}
public PDOMCPPClassTemplate(PDOMLinkage linkage, long bindingRecord) {
super(linkage, bindingRecord);
}
@Override
protected int getRecordSize() {
return RECORD_SIZE;
}
@Override
public int getNodeType() {
return IIndexCPPBindingConstants.CPP_CLASS_TEMPLATE;
}
public ICPPTemplateParameter[] getTemplateParameters() {
if (params == null) {
try {
final Database db = getDB();
long rec= db.getRecPtr(record + PARAMETERS);
int count= Math.max(0, db.getShort(record + RELEVANT_PARAMETERS));
if (rec == 0 || count == 0) {
params= ICPPTemplateParameter.EMPTY_TEMPLATE_PARAMETER_ARRAY;
} else {
IPDOMCPPTemplateParameter[] allParams = PDOMTemplateParameterArray.getArray(this, rec);
count= Math.min(count, allParams.length);
if (count == allParams.length) {
params= allParams;
} else {
params= new ICPPTemplateParameter[count];
System.arraycopy(allParams, 0, params, 0, count);
}
}
} catch (CoreException e) {
CCorePlugin.log(e);
params = ICPPTemplateParameter.EMPTY_TEMPLATE_PARAMETER_ARRAY;
}
}
return params;
}
@Override
public void update(PDOMLinkage linkage, IBinding newBinding) throws CoreException {
super.update(linkage, newBinding);
if (newBinding instanceof ICPPClassTemplate) {
ICPPClassTemplate ct= (ICPPClassTemplate) newBinding;
try {
updateTemplateParameters(linkage, ct.getTemplateParameters());
} catch (DOMException e) {
CCorePlugin.log(e);
}
}
}
private void updateTemplateParameters(PDOMLinkage linkage, ICPPTemplateParameter[] newParams) throws CoreException, DOMException {
final Database db = getDB();
long rec= db.getRecPtr(record + PARAMETERS);
IPDOMCPPTemplateParameter[] allParams;
if (rec == 0) {
allParams= IPDOMCPPTemplateParameter.EMPTY_ARRAY;
} else {
allParams = PDOMTemplateParameterArray.getArray(this, rec);
}
final int newParamLength = newParams.length;
int[] props= new int[allParams.length];
int[] result= new int[newParamLength];
int additionalPars= 0;
boolean reorder= false;
for (int i = 0; i < props.length; i++) {
final IPDOMCPPTemplateParameter par = allParams[i];
props[i]= getProperty(par);
}
outer: for (int i = 0; i < newParamLength; i++) {
ICPPTemplateParameter newPar = newParams[i];
int prop= getProperty(newPar);
for (int j = 0; j < props.length; j++) {
if (props[j] == prop) {
// reuse param
result[i]= j;
props[j]= -1;
allParams[j].update(linkage, newPar);
if (j != i)
reorder= true;
continue outer;
}
}
result[i]= -1;
additionalPars++;
}
if (additionalPars > 0 || reorder) {
params= null;
IPDOMCPPTemplateParameter[] newAllParams= new IPDOMCPPTemplateParameter[allParams.length+additionalPars];
for (int j = 0; j < newParamLength; j++) {
int idx= result[j];
if (idx >= 0) {
newAllParams[j]= allParams[idx];
allParams[idx]= null;
} else {
newAllParams[j]= PDOMTemplateParameterArray.createPDOMTemplateParameter(getLinkage(), this, newParams[j]);
}
}
int pos= newParamLength;
for (int j = 0; j < allParams.length; j++) {
IPDOMCPPTemplateParameter unused = allParams[j];
if (unused != null)
newAllParams[pos++]= unused;
}
if (rec != 0)
db.free(rec);
rec= PDOMTemplateParameterArray.putArray(db, newAllParams);
db.putRecPtr(record + PARAMETERS, rec);
}
db.putShort(record + RELEVANT_PARAMETERS, (short) newParamLength);
}
private int getProperty(ICPPTemplateParameter par) {
int result= par.getParameterPosition() & 0xffff;
if (par instanceof ICPPTemplateTypeParameter)
return result;
if (par instanceof ICPPTemplateNonTypeParameter)
return result | 0x10000;
return result | 0x20000;
}
private PDOMCPPClassTemplatePartialSpecialization getFirstPartial() throws CoreException {
long value = getDB().getRecPtr(record + FIRST_PARTIAL);
return value != 0 ? new PDOMCPPClassTemplatePartialSpecialization(getLinkage(), value) : null;
}
public void addPartial(PDOMCPPClassTemplatePartialSpecialization partial) throws CoreException {
PDOMCPPClassTemplatePartialSpecialization first = getFirstPartial();
partial.setNextPartial(first);
getDB().putRecPtr(record + FIRST_PARTIAL, partial.getRecord());
}
public ICPPClassTemplatePartialSpecialization[] getPartialSpecializations() throws DOMException {
try {
ArrayList<PDOMCPPClassTemplatePartialSpecialization> partials =
new ArrayList<PDOMCPPClassTemplatePartialSpecialization>();
for (PDOMCPPClassTemplatePartialSpecialization partial = getFirstPartial();
partial != null;
partial = partial.getNextPartial()) {
partials.add(partial);
}
return partials.toArray(new ICPPClassTemplatePartialSpecialization[partials.size()]);
} catch (CoreException e) {
CCorePlugin.log(e);
return new ICPPClassTemplatePartialSpecialization[0];
}
}
@Override
public boolean isSameType(IType type) {
if (type instanceof ITypedef) {
return type.isSameType(this);
}
if (type instanceof PDOMNode) {
PDOMNode node= (PDOMNode) type;
if (node.getPDOM() == getPDOM()) {
return node.getRecord() == getRecord();
}
}
// need a class template
if (type instanceof ICPPClassTemplate == false || type instanceof ProblemBinding)
return false;
// exclude other kinds of class templates
if (type instanceof ICPPClassTemplatePartialSpecialization ||
type instanceof ICPPTemplateTemplateParameter ||
type instanceof ICPPClassSpecialization)
return false;
try {
ICPPClassType ctype= (ICPPClassType) type;
if (ctype.getKey() != getKey())
return false;
char[] nchars = ctype.getNameCharArray();
if (nchars.length == 0) {
nchars= ASTTypeUtil.createNameForAnonymous(ctype);
}
if (nchars == null || !CharArrayUtils.equals(nchars, getNameCharArray()))
return false;
return SemanticUtil.isSameOwner(getOwner(), ctype.getOwner());
} catch (DOMException e) {
return false;
}
}
public ICPPTemplateInstance getInstance(ICPPTemplateArgument[] arguments) {
return PDOMInstanceCache.getCache(this).getInstance(arguments);
}
public void addInstance(ICPPTemplateArgument[] arguments, ICPPTemplateInstance instance) {
PDOMInstanceCache.getCache(this).addInstance(arguments, instance);
}
public ICPPTemplateInstance[] getAllInstances() {
return PDOMInstanceCache.getCache(this).getAllInstances();
}
public ICPPTemplateParameter adaptTemplateParameter(ICPPTemplateParameter param) {
// Template parameters are identified by their position in the parameter list.
int pos = param.getParameterPosition();
ICPPTemplateParameter[] pars = getTemplateParameters();
if (pars == null || pos >= pars.length)
return null;
ICPPTemplateParameter result= pars[pos];
if (param instanceof ICPPTemplateTypeParameter) {
if (result instanceof ICPPTemplateTypeParameter)
return result;
} else if (param instanceof ICPPTemplateNonTypeParameter) {
if (result instanceof ICPPTemplateNonTypeParameter)
return result;
} else if (param instanceof ICPPTemplateTemplateParameter) {
if (result instanceof ICPPTemplateTemplateParameter)
return result;
}
return null;
}
public ICPPDeferredClassInstance asDeferredInstance() throws DOMException {
PDOMInstanceCache cache= PDOMInstanceCache.getCache(this);
synchronized (cache) {
ICPPDeferredClassInstance dci= cache.getDeferredInstance();
if (dci == null) {
dci= createDeferredInstance();
cache.putDeferredInstance(dci);
}
return dci;
}
}
protected ICPPDeferredClassInstance createDeferredInstance() throws DOMException {
ICPPTemplateArgument[] args = CPPTemplates.templateParametersAsArguments(getTemplateParameters());
return new CPPDeferredClassInstance(this, args, getCompositeScope());
}
}
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