File indexing completed on 2024-05-12 03:54:54

 /*
     This file is part of the KDE libraries
 
     SPDX-FileCopyrightText: 1999 Waldo Bastian <bastian@kde.org>
     SPDX-FileCopyrightText: 2006 Allen Winter <winter@kde.org>
     SPDX-FileCopyrightText: 2006 Gregory S. Hayes <syncomm@kde.org>
     SPDX-FileCopyrightText: 2006 Jaison Lee <lee.jaison@gmail.com>
     SPDX-FileCopyrightText: 2011 Romain Perier <bambi@ubuntu.com>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 
 #include "kbackup.h"
 
 #include <QDir>
 #include <QFileInfo>
 
 namespace KBackup
 {
 bool simpleBackupFile(const QString &qFilename, const QString &backupDir, const QString &backupExtension)
 {
     QString backupFileName = qFilename + backupExtension;
 
     if (!backupDir.isEmpty()) {
         QFileInfo fileInfo(qFilename);
         backupFileName = backupDir + QLatin1Char('/') + fileInfo.fileName() + backupExtension;
     }
 
     //    qCDebug(KCOREADDONS_DEBUG) << "KBackup copying " << qFilename << " to " << backupFileName;
     QFile::remove(backupFileName);
     return QFile::copy(qFilename, backupFileName);
 }
 
 bool numberedBackupFile(const QString &qFilename, const QString &backupDir, const QString &backupExtension, const uint maxBackups)
 {
     QFileInfo fileInfo(qFilename);
 
     // The backup file name template.
     QString sTemplate;
     if (backupDir.isEmpty()) {
         sTemplate = qFilename + QLatin1String(".%1") + backupExtension;
     } else {
         sTemplate = backupDir + QLatin1Char('/') + fileInfo.fileName() + QLatin1String(".%1") + backupExtension;
     }
 
     // First, search backupDir for numbered backup files to remove.
     // Remove all with number 'maxBackups' and greater.
     QDir d = backupDir.isEmpty() ? fileInfo.dir() : backupDir;
     d.setFilter(QDir::Files | QDir::Hidden | QDir::NoSymLinks);
     const QStringList nameFilters = QStringList(fileInfo.fileName() + QLatin1String(".*") + backupExtension);
     d.setNameFilters(nameFilters);
     d.setSorting(QDir::Name);
 
     uint maxBackupFound = 0;
     const QFileInfoList infoList = d.entryInfoList();
     for (const QFileInfo &fi : infoList) {
         if (fi.fileName().endsWith(backupExtension)) {
             // sTemp holds the file name, without the ending backupExtension
             QString sTemp = fi.fileName();
             sTemp.truncate(fi.fileName().length() - backupExtension.length());
             // compute the backup number
             int idex = sTemp.lastIndexOf(QLatin1Char('.'));
             if (idex > 0) {
                 bool ok;
                 const uint num = QStringView(sTemp).mid(idex + 1).toUInt(&ok);
                 if (ok) {
                     if (num >= maxBackups) {
                         QFile::remove(fi.filePath());
                     } else {
                         maxBackupFound = qMax(maxBackupFound, num);
                     }
                 }
             }
         }
     }
 
     // Next, rename max-1 to max, max-2 to max-1, etc.
     QString to = sTemplate.arg(maxBackupFound + 1);
     for (int i = maxBackupFound; i > 0; i--) {
         QString from = sTemplate.arg(i);
         //        qCDebug(KCOREADDONS_DEBUG) << "KBackup renaming " << from << " to " << to;
         QFile::rename(from, to);
         to = from;
     }
 
     // Finally create most recent backup by copying the file to backup number 1.
     //    qCDebug(KCOREADDONS_DEBUG) << "KBackup copying " << qFilename << " to " << sTemplate.arg(1);
     return QFile::copy(qFilename, sTemplate.arg(1));
 }
 
 }