diff -r 000000000000 -r 1918ee327afb tools/porting/src/replacetoken.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/porting/src/replacetoken.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,105 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the qt3to4 porting application of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "replacetoken.h"
+#include "tokenreplacements.h"
+#include <QByteArray>
+
+QT_BEGIN_NAMESPACE
+
+/*
+    Add an entry to the tokenRuleLookup map for each token replacement rule.
+*/
+ReplaceToken::ReplaceToken(const QList<TokenReplacement*> &tokenReplacementRules)
+:tokenReplacementRules(tokenReplacementRules)
+{
+    foreach (TokenReplacement* rep, tokenReplacementRules) {
+        QByteArray key = rep->getReplaceKey();
+        if(!key.isEmpty()) {
+            tokenRuleLookup.insert(key, rep);
+        }
+    }
+}
+
+TextReplacements ReplaceToken::getTokenTextReplacements(const TokenEngine::TokenContainer &container)
+{
+    TextReplacements textReplacements;
+
+    int t=0;
+    const int numTokens = container.count();
+    while(t < numTokens) {
+        QByteArray tokenText = container.text(t);
+        bool changed = false;
+
+        if(isPreprocessorDirective(tokenText)) {
+            foreach(TokenReplacement *tokenReplacementRule, tokenReplacementRules) {
+                if(!changed)
+                    changed = tokenReplacementRule->doReplace(container, t, textReplacements);
+                if(changed)
+                    break;
+            }
+        } else if (isInterestingToken(tokenText.trimmed())) {
+            foreach (TokenReplacement* value, tokenRuleLookup.values(tokenText)) {
+                changed = value->doReplace(container, t, textReplacements);
+                if(changed) {
+                    goto end;
+                }
+            }
+        }
+    end:
+        ++t;
+    }
+    return textReplacements;
+}
+
+bool ReplaceToken::isInterestingToken(const QByteArray &text)
+{
+    return !(text.isEmpty() || text==";" || text=="(" || text==")" || text=="{" || text=="}" || text=="="
+            || text=="+=" || text=="-=" || text=="if" || text=="then" || text=="else"
+    );
+}
+
+bool ReplaceToken::isPreprocessorDirective(const QByteArray &token)
+{
+    return (token[0]=='#');
+}
+
+QT_END_NAMESPACE