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/*******************************************************************************
* Copyright (c) 2008, 2012 Institute for Software, HSR Hochschule fuer Technik
* Rapperswil, University of applied sciences 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:
* Institute for Software - initial API and implementation
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.rewrite.astwriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import java.util.TreeSet;
import org.eclipse.cdt.core.dom.ast.IASTFileLocation;
import org.eclipse.cdt.core.dom.ast.IASTMacroExpansionLocation;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTNodeLocation;
import org.eclipse.cdt.core.dom.ast.IASTPreprocessorIncludeStatement;
import org.eclipse.cdt.core.dom.ast.IASTPreprocessorMacroDefinition;
import org.eclipse.cdt.core.dom.ast.IASTStatement;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
import org.eclipse.cdt.core.index.IIndex;
import org.eclipse.cdt.core.index.IIndexMacro;
import org.eclipse.cdt.core.index.IIndexName;
import org.eclipse.cdt.core.index.IndexFilter;
import org.eclipse.cdt.internal.core.pdom.dom.PDOMMacroReferenceName;
import org.eclipse.core.runtime.CoreException;
/**
* Recognizes nodes that are the result of an macro expansion and replaces them
* with a suitable macro call.
*
* @author Emanuel Graf IFS
*/
public class MacroExpansionHandler {
private final Scribe scribe;
private int lastMacroExpOffset;
private IASTTranslationUnit ast;
private Map<String, List<IIndexName>> macroExpansion = new TreeMap<String, List<IIndexName>>();
public MacroExpansionHandler(Scribe scribe) {
this.scribe = scribe;
}
protected boolean checkisMacroExpansionNode(IASTNode node) {
return checkisMacroExpansionNode(node, true);
}
protected boolean isStatementWithMixedLocation(IASTStatement node) {
IASTNodeLocation[] nodeLocations = getNodeLocations(node);
if (nodeLocations != null && nodeLocations.length > 1) {
for (IASTNodeLocation loc : nodeLocations) {
if (loc instanceof IASTMacroExpansionLocation) {
return true;
}
}
}
return false;
}
protected boolean macroExpansionAlreadyPrinted(IASTNode node) {
IASTNodeLocation[] locs = node.getNodeLocations();
if (locs.length ==1) {
if (locs[0] instanceof IASTMacroExpansionLocation) {
IASTMacroExpansionLocation macroNode = (IASTMacroExpansionLocation) locs[0];
if (macroNode.asFileLocation().getNodeOffset() == lastMacroExpOffset) {
return true;
}
}
}
return false;
}
protected boolean checkisMacroExpansionNode(IASTNode node, boolean write) {
IASTTranslationUnit unit = node.getTranslationUnit();
if (ast == null || !ast.equals(unit)) {
initEmptyMacros(unit);
}
IASTNodeLocation[] locs = getNodeLocations(node);
if (locs != null && locs.length == 1) {
if (locs[0] instanceof IASTMacroExpansionLocation) {
IASTMacroExpansionLocation macroNode = (IASTMacroExpansionLocation) locs[0];
if (macroNode.asFileLocation().getNodeOffset() == lastMacroExpOffset) {
return true;
}
if (write) {
lastMacroExpOffset = macroNode.asFileLocation().getNodeOffset();
node = node.getOriginalNode();
scribe.print(node.getRawSignature());
}
return true;
}
}
handleEmptyMacroExpansion(node);
return false;
}
private IASTNodeLocation[] getNodeLocations(IASTNode node) {
return node.getOriginalNode().getNodeLocations();
}
private void handleEmptyMacroExpansion(IASTNode node) {
if (node.getTranslationUnit() == null)
return;
String file = node.getContainingFilename();
List<IIndexName> exps = macroExpansion.get(file);
if (exps != null && !exps.isEmpty()) {
IASTFileLocation fileLocation = getFileLocation(node);
if (fileLocation != null) {
int nOff = fileLocation.getNodeOffset();
for (IIndexName iIndexName : exps) {
if (iIndexName instanceof PDOMMacroReferenceName) {
PDOMMacroReferenceName mName = (PDOMMacroReferenceName) iIndexName;
int eOff = mName.getFileLocation().getNodeOffset();
int eLength = mName.getFileLocation().getNodeLength();
if (eOff < nOff && Math.abs((eOff + eLength - nOff)) < 3) {
scribe.print(mName.toString() + " "); //$NON-NLS-1$
}
}
}
}
}
}
private IASTFileLocation getFileLocation(IASTNode node) {
return node.getOriginalNode().getFileLocation();
}
private void initEmptyMacros(IASTTranslationUnit unit) {
if (unit != null) {
ast = unit;
IIndex index = ast.getIndex();
if (index != null) {
macroExpansion = new TreeMap<String, List<IIndexName>>();
IASTPreprocessorMacroDefinition[] md = ast.getMacroDefinitions();
TreeSet<String>paths = new TreeSet<String>();
for (IASTPreprocessorIncludeStatement is :ast.getIncludeDirectives()) {
if (!is.isSystemInclude()) {
paths.add(is.getContainingFilename());
}
}
paths.add(ast.getContainingFilename());
for (IASTPreprocessorMacroDefinition iastPreprocessorMacroDefinition : md) {
if (iastPreprocessorMacroDefinition.getExpansion().length() == 0) {
try {
IIndexMacro[] macroBinding = index.findMacros(
iastPreprocessorMacroDefinition.getName().toCharArray(),
IndexFilter.ALL, null);
if (macroBinding.length > 0) {
IIndexName[] refs = index.findReferences(macroBinding[0]);
for (IIndexName iIndexName : refs) {
String filename = iIndexName.getFileLocation().getFileName();
List<IIndexName> fileList = macroExpansion.get(filename);
if (paths.contains(filename)) {
if (fileList == null) {
fileList = new ArrayList<IIndexName>();
macroExpansion.put(filename, fileList);
}
fileList.add(iIndexName);
}
}
}
} catch (CoreException e) {
e.printStackTrace();
}
}
}
} else {
macroExpansion = Collections.emptyMap();
}
}
}
public void reset() {
lastMacroExpOffset = -1;
}
}
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