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Splitting a bin file of 10560 bytes

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  • A Anna_64

    i want to split a file which looks like
    QFile file("C:\Users\Desktop\binfile_enc.bin");
    this file is of size 1050.624 bytes
    i want to split into 64 chunks please help

    J.HilkJ Offline
    J.HilkJ Offline
    J.Hilk
    Moderators
    wrote on last edited by
    #5

    @Anna_64
    Please, do not ask the same question in multiple threads.

    Creating a new topic for a new question is the way it's supposed to be, but you asked this now also in 2 other topics.


    Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


    Q: What's that?
    A: It's blue light.
    Q: What does it do?
    A: It turns blue.

    1 Reply Last reply
    2
    • jsulmJ jsulm

      @Anna_64 Read the file into a QByteArray and use https://doc.qt.io/qt-5/qbytearray.html#mid to split it

      A Offline
      A Offline
      Anna_64
      wrote on last edited by
      #6

      @jsulm how to show the start and end position
      also i need 64 chunks 16416 bytes from my file

      jsulmJ 1 Reply Last reply
      0
      • Christian EhrlicherC Offline
        Christian EhrlicherC Offline
        Christian Ehrlicher
        Lifetime Qt Champion
        wrote on last edited by
        #7

        Simply read your chunks with QFile::read(int) and do whatever you want to do with the data afterwards.

        Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
        Visit the Qt Academy at https://academy.qt.io/catalog

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        • A Anna_64

          @jsulm how to show the start and end position
          also i need 64 chunks 16416 bytes from my file

          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #8

          @Anna_64 said in Splitting a bin file of 10560 bytes:

          how to show the start and end position

          this is simple math

          https://forum.qt.io/topic/113070/qt-code-of-conduct

          JonBJ A 2 Replies Last reply
          1
          • jsulmJ jsulm

            @Anna_64 said in Splitting a bin file of 10560 bytes:

            how to show the start and end position

            this is simple math

            JonBJ Offline
            JonBJ Offline
            JonB
            wrote on last edited by
            #9

            @jsulm
            I previously answered this question asked by @Anna_64 in other thread at https://forum.qt.io/topic/100441/issue-reading-from-qserialport/14.

            1 Reply Last reply
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            • jsulmJ jsulm

              @Anna_64 said in Splitting a bin file of 10560 bytes:

              how to show the start and end position

              this is simple math

              A Offline
              A Offline
              Anna_64
              wrote on last edited by
              #10

              @jsulm how to read a file in 64 times in qt

              jsulmJ 1 Reply Last reply
              0
              • A Anna_64

                @jsulm how to read a file in 64 times in qt

                jsulmJ Offline
                jsulmJ Offline
                jsulm
                Lifetime Qt Champion
                wrote on last edited by
                #11

                @Anna_64 Using a for-loop and QFile::read(int) as @Christian-Ehrlicher suggested.

                https://forum.qt.io/topic/113070/qt-code-of-conduct

                1 Reply Last reply
                3
                • jsulmJ jsulm

                  @Anna_64 Read the file into a QByteArray and use https://doc.qt.io/qt-5/qbytearray.html#mid to split it

                  A Offline
                  A Offline
                  Anna_64
                  wrote on last edited by
                  #12

                  @jsulm i have a QByte Array z=y.mid(0,16326);
                  i want to 64 chunk like this from 16326 how to do that

                  J.HilkJ jsulmJ 2 Replies Last reply
                  0
                  • A Anna_64

                    @jsulm i have a QByte Array z=y.mid(0,16326);
                    i want to 64 chunk like this from 16326 how to do that

                    J.HilkJ Offline
                    J.HilkJ Offline
                    J.Hilk
                    Moderators
                    wrote on last edited by
                    #13

                    @Anna_64
                    you're either having us on, or you started coding literally last week.

                    In the later case, you should to some tutorial/learning on the basics first.

                    https://www.tutorialspoint.com/cplusplus/index.htm


                    Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                    Q: What's that?
                    A: It's blue light.
                    Q: What does it do?
                    A: It turns blue.

                    1 Reply Last reply
                    4
                    • A Anna_64

                      @jsulm i have a QByte Array z=y.mid(0,16326);
                      i want to 64 chunk like this from 16326 how to do that

                      jsulmJ Offline
                      jsulmJ Offline
                      jsulm
                      Lifetime Qt Champion
                      wrote on last edited by jsulm
                      #14

                      @Anna_64 said in Splitting a bin file of 10560 bytes:

                      i want to 64 chunk like this from 16326 how to do that

                      So, you want to divide 16326 into 64 chunks, right?
                      What would the size of one chink be then? This is now not programming, just simple math.
                      If you calculated the size of one chunk, you then can have a for-loop (https://en.cppreference.com/w/cpp/language/for) which you execute 64 times and in each iteration read one chunk from the file (using QFile::read(int)).

                      https://forum.qt.io/topic/113070/qt-code-of-conduct

                      A 1 Reply Last reply
                      2
                      • jsulmJ jsulm

                        @Anna_64 said in Splitting a bin file of 10560 bytes:

                        i want to 64 chunk like this from 16326 how to do that

                        So, you want to divide 16326 into 64 chunks, right?
                        What would the size of one chink be then? This is now not programming, just simple math.
                        If you calculated the size of one chunk, you then can have a for-loop (https://en.cppreference.com/w/cpp/language/for) which you execute 64 times and in each iteration read one chunk from the file (using QFile::read(int)).

                        A Offline
                        A Offline
                        Anna_64
                        wrote on last edited by
                        #15

                        yes i calculated size of a chunk it s 16416 now i take it like QByteArray y= iContents.mid(0,16416)
                        now i need 64 chunk like this
                        thank u for guiding

                        jsulmJ 1 Reply Last reply
                        0
                        • A Anna_64

                          yes i calculated size of a chunk it s 16416 now i take it like QByteArray y= iContents.mid(0,16416)
                          now i need 64 chunk like this
                          thank u for guiding

                          jsulmJ Offline
                          jsulmJ Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on last edited by
                          #16

                          @Anna_64

                          for (int i = 0; i < 64; ++i) {
                              QByteArray y= iContents.mid(i * 16416, 16416);
                              ...
                          }
                          

                          https://forum.qt.io/topic/113070/qt-code-of-conduct

                          A 1 Reply Last reply
                          3
                          • jsulmJ jsulm

                            @Anna_64

                            for (int i = 0; i < 64; ++i) {
                                QByteArray y= iContents.mid(i * 16416, 16416);
                                ...
                            }
                            
                            A Offline
                            A Offline
                            Anna_64
                            wrote on last edited by
                            #17

                            @jsulmthank you

                            Pablo J. RoginaP 1 Reply Last reply
                            0
                            • A Anna_64

                              @jsulmthank you

                              Pablo J. RoginaP Offline
                              Pablo J. RoginaP Offline
                              Pablo J. Rogina
                              wrote on last edited by
                              #18

                              @Anna_64 if your issue is solved please don't forget to mark your post as such!. Thanks.

                              Upvote the answer(s) that helped you solve the issue
                              Use "Topic Tools" button to mark your post as Solved
                              Add screenshots via postimage.org
                              Don't ask support requests via chat/PM. Please use the forum so others can benefit from the solution in the future

                              1 Reply Last reply
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