/* This file is part of the KDE libraries
   Copyright (C) 2007 Sebastian Pipping <webmaster@hartwork.org>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 */

#include "katewildcardmatcher.h"
#include <QString>
#include <QChar>

namespace KateWildcardMatcher
{
bool exactMatch(const QString &candidate, const QString &wildcard, int candidatePosFromRight, int wildcardPosFromRight, bool caseSensitive = true)
{
    for (; wildcardPosFromRight >= 0; wildcardPosFromRight--) {
        const ushort ch = wildcard[wildcardPosFromRight].unicode();
        switch (ch) {
            case L'*':
                if (candidatePosFromRight == -1) {
                    break;
                }

                if (wildcardPosFromRight == 0) {
                    return true;
                }

                // Eat all we can and go back as far as we have to
                for (int j = -1; j <= candidatePosFromRight; j++) {
                    if (exactMatch(candidate, wildcard, j, wildcardPosFromRight - 1)) {
                        return true;
                    }
                }
                return false;

            case L'?':
                if (candidatePosFromRight == -1) {
                    return false;
                }

                candidatePosFromRight--;
                break;

            default:
                if (candidatePosFromRight == -1) {
                    return false;
                }

                const ushort candidateCh = candidate[candidatePosFromRight].unicode();
                const bool match = caseSensitive ? (candidateCh == ch) : (QChar::toLower(candidateCh) == QChar::toLower(ch));
                if (match) {
                    candidatePosFromRight--;
                } else {
                    return false;
                }
        }
    }
    return true;
}

bool exactMatch(const QString &candidate, const QString &wildcard, bool caseSensitive)
{
    return exactMatch(candidate, wildcard, candidate.length() - 1, wildcard.length() - 1, caseSensitive);
}

}
