/**************************************************************************
**
** This file is part of Qt Creator
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** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
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** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** 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
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#include "FastPreprocessor.h"
#include <Literals.h>
#include <TranslationUnit.h>
#include <QtCore/QDebug>

using namespace CPlusPlus;

FastPreprocessor::FastPreprocessor(const Snapshot &snapshot)
    : _snapshot(snapshot),
      _preproc(this, &_env)
{ }

QByteArray FastPreprocessor::run(QString fileName, const QString &source)
{
    _preproc.setExpandMacros(false);

    if (Document::Ptr doc = _snapshot.document(fileName)) {
        _merged.insert(fileName);

        mergeEnvironment(QLatin1String("<configuration>"));
        foreach (const Document::Include &i, doc->includes())
            mergeEnvironment(i.fileName());
    }

    const QByteArray preprocessed = _preproc(fileName, source);
    return preprocessed;
}

void FastPreprocessor::sourceNeeded(QString &fileName, IncludeType, unsigned)
{ mergeEnvironment(fileName); }

void FastPreprocessor::mergeEnvironment(const QString &fileName)
{
    if (! _merged.contains(fileName)) {
        _merged.insert(fileName);

        if (Document::Ptr doc = _snapshot.document(fileName)) {
            foreach (const Document::Include &i, doc->includes())
                mergeEnvironment(i.fileName());

            _env.addMacros(doc->definedMacros());
        }
    }
}