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Quazip functions

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  • K Offline
    K Offline
    kitten
    wrote on last edited by
    #6

    but the documentation in qunzip is italian and i know only english and persian
    i don't see any forum to answers questions
    what should i do?

    www.kitten.mihanblog.com

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    • V Offline
      V Offline
      vsorokin
      wrote on last edited by
      #7

      Ok just give link to italian documentation, some Italian guys are on this forum

      --
      Vasiliy

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      • K Offline
        K Offline
        kitten
        wrote on last edited by
        #8

        this is a italian documentation
        http://quazip.sourceforge.net/classJlCompress.html

        www.kitten.mihanblog.com

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        • V Offline
          V Offline
          vsorokin
          wrote on last edited by
          #9

          So.... it's still qu a zip, not qu n zip

          --
          Vasiliy

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          • K Offline
            K Offline
            kitten
            wrote on last edited by
            #10

            yes it was a writing problem i had ,sorry for that

            www.kitten.mihanblog.com

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            • V Offline
              V Offline
              vsorokin
              wrote on last edited by
              #11

              OK, this method:
              @static QString extractFile(QString fileCompressed, QString file, QString fileDest = QString());@

              get first param - path to your .zip file
              get second param - name of file for extracting in .zip archive.
              get third param - name for uncompressed version of file.

              if third param is not set, fileDest = file, i.e. destination file will has same name ("mm" in your example)
              After this method finished, destination file will created. and method return you path to this file (not data, data already in file on hdd).

              More, it is static method, you are not needed create instance of JlCompress

              just make:

              @QString comp = JlCompress::extractFile(comp,"mm"); // comp is a filePath
              ....
              @

              --
              Vasiliy

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              • K Offline
                K Offline
                kitten
                wrote on last edited by
                #12

                but i have my compressed file in the one of the cells of my table in db, it is bubble data
                and i read it to a qstring
                and i don't have the name of files on my compressed file
                should i write it to a file?

                www.kitten.mihanblog.com

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                • V Offline
                  V Offline
                  vsorokin
                  wrote on last edited by
                  #13

                  I think you can.
                  But for this you need use lower level of quazip, you need use QuaZip class
                  It has constructor
                  @QuaZip(QIODevice *ioDevice);@
                  and you can set QDataStream.

                  Also QuaZip class was written by russian guy and it has english documentation, also you can look to tests - its are good examples of using.

                  --
                  Vasiliy

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                  • G Offline
                    G Offline
                    goetz
                    wrote on last edited by
                    #14

                    A [[Doc:QDataStream]] is not a [[Doc:QIODevice]], one would have to pass a [[Doc:QFile]] or another QIODevice subclass to the QuaZip constructor.

                    How do you "have the compressed file in the cell" of your table? We speak of arbitrary binary data, which needs to be stored in a QByteArray and which is hardly ever readable to a human.

                    http://www.catb.org/~esr/faqs/smart-questions.html

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                    • V Offline
                      V Offline
                      vsorokin
                      wrote on last edited by
                      #15

                      [quote author="Volker" date="1317330881"]A :QDataStream is not a QIODevice[/quote]
                      Ahh! Shame on me! :-/

                      --
                      Vasiliy

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                      • K Offline
                        K Offline
                        kitten
                        wrote on last edited by
                        #16

                        it is a blob cell that contain a zipped file, how can i use this with quazip?
                        i tried to open this blob cell to a qstring or qbytearray but it does'nt work correctly , it load only a few charachters , i think it has null values into it , what should i do?

                        www.kitten.mihanblog.com

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                        • G Offline
                          G Offline
                          goetz
                          wrote on last edited by
                          #17

                          Sorry, I misread your post. A "cell in the table" usually triggers the concept of something like a [[Doc:QTableWidget]] in Qt world (and not only there). You were referring to a BLOB column of a database table, which make much more sense.

                          In that case:
                          Read the BLOB data into a [[Doc:QByteArray]], feed that as that data storage to a [[Doc:QBuffer]] and feed that to the QuaZip constructor mentioned by Vass.

                          http://www.catb.org/~esr/faqs/smart-questions.html

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