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Splitting a bin file of 10560 bytes

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  • A Anna_64

    Re: Read binary Data and write it back

    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #2

    @Anna_64 What is your question?

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

    1 Reply Last reply
    0
    • A Offline
      A Offline
      Anna_64
      wrote on last edited by
      #3

      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

      jsulmJ J.HilkJ 2 Replies Last reply
      0
      • 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

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #4

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

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

        A 2 Replies Last reply
        3
        • 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

              1 Reply Last reply
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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
                  0
                  • 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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