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diff --git a/depends/quazip/JlCompress.h b/depends/quazip/JlCompress.h
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+++ b/depends/quazip/JlCompress.h
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+#ifndef JLCOMPRESSFOLDER_H_
+#define JLCOMPRESSFOLDER_H_
+
+#include "quazip.h"
+#include "quazipfile.h"
+#include "quazipfileinfo.h"
+#include <QString>
+#include <QDir>
+#include <QFileInfo>
+#include <QFile>
+
+/// Utility class for typical operations.
+/**
+  This class contains a number of useful static functions to perform
+  simple operations, such as mass ZIP packing or extraction.
+  */
+class QUAZIP_EXPORT JlCompress {
+private:
+    /// Compress a single file.
+    /**
+      \param zip Opened zip to compress the file to.
+      \param fileName The full path to the source file.
+      \param fileDest The full name of the file inside the archive.
+      \return true if success, false otherwise.
+      */
+    static bool compressFile(QuaZip* zip, QString fileName, QString fileDest);
+    /// Compress a subdirectory.
+    /**
+      \param parentZip Opened zip containing the parent directory.
+      \param dir The full path to the directory to pack.
+      \param parentDir The full path to the directory corresponding to
+      the root of the ZIP.
+      \param recursive Whether to pack sub-directories as well or only
+      files.
+      \return true if success, false otherwise.
+      */
+    static bool compressSubDir(QuaZip* parentZip, QString dir, QString parentDir, bool recursive = true);
+    /// Extract a single file.
+    /**
+      \param zip The opened zip archive to extract from.
+      \param fileName The full name of the file to extract.
+      \param fileDest The full path to the destination file.
+      \return true if success, false otherwise.
+      */
+    static bool extractFile(QuaZip* zip, QString fileName, QString fileDest);
+    /// Remove some files.
+    /**
+      \param listFile The list of files to remove.
+      \return true if success, false otherwise.
+      */
+    static bool removeFile(QStringList listFile);
+
+public:
+    /// Compress a single file.
+    /**
+      \param fileCompressed The name of the archive.
+      \param file The file to compress.
+      \return true if success, false otherwise.
+      */
+    static bool compressFile(QString fileCompressed, QString file);
+    /// Compress a list of files.
+    /**
+      \param fileCompressed The name of the archive.
+      \param files The file list to compress.
+      \return true if success, false otherwise.
+      */
+    static bool compressFiles(QString fileCompressed, QStringList files);
+    /// Compress a whole directory.
+    /**
+      \param fileCompressed The name of the archive.
+      \param dir The directory to compress.
+      \param recursive Whether to pack the subdirectories as well, or
+      just regular files.
+      \return true if success, false otherwise.
+      */
+    static bool compressDir(QString fileCompressed, QString dir = QString(), bool recursive = true);
+
+public:
+    /// Extract a single file.
+    /**
+      \param fileCompressed The name of the archive.
+      \param fileName The file to extract.
+      \param fileDest The destination file, assumed to be identical to
+      \a file if left empty.
+      \return The list of the full paths of the files extracted, empty on failure.
+      */
+    static QString extractFile(QString fileCompressed, QString fileName, QString fileDest = QString());
+    /// Extract a list of files.
+    /**
+      \param fileCompressed The name of the archive.
+      \param files The file list to extract.
+      \param dir The directory to put the files to, the current
+      directory if left empty.
+      \return The list of the full paths of the files extracted, empty on failure.
+      */
+    static QStringList extractFiles(QString fileCompressed, QStringList files, QString dir = QString());
+    /// Extract a whole archive.
+    /**
+      \param fileCompressed The name of the archive.
+      \param dir The directory to extract to, the current directory if
+      left empty.
+      \return The list of the full paths of the files extracted, empty on failure.
+      */
+    static QStringList extractDir(QString fileCompressed, QString dir = QString());
+    /// Extract a whole archive, with a list of exceptions (prefixes to ignore).
+    /**
+      \param fileCompressed The name of the archive.
+      \param dir The directory to extract to, the current directory if
+      left empty.
+      \param exceptions The list of exception prefixes
+      \return The list of the full paths of the files extracted, empty on failure.
+      */
+    static QStringList extractWithExceptions(QString fileCompressed, QString dir, QStringList exceptions);
+    /// Get the file list.
+    /**
+      \return The list of the files in the archive, or, more precisely, the
+      list of the entries, including both files and directories if they
+      are present separately.
+      */
+    static QStringList getFileList(QString fileCompressed);
+};
+
+#endif /* JLCOMPRESSFOLDER_H_ */