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  4. how to read hex value data from text file and store into array?
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how to read hex value data from text file and store into array?

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  • S Offline
    S Offline
    sachin786
    wrote on last edited by
    #6

    no i want to just copy this 498 bytes data into an array...

    1 Reply Last reply
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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #7

      So basically:

      QByteArray, fileContent = myFile.readAll();
      memcpy(&hex[4], fileContent.data(), fileContent.size());
      

      ?

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      JohanSoloJ 1 Reply Last reply
      0
      • SGaistS SGaist

        So basically:

        QByteArray, fileContent = myFile.readAll();
        memcpy(&hex[4], fileContent.data(), fileContent.size());
        

        ?

        JohanSoloJ Offline
        JohanSoloJ Offline
        JohanSolo
        wrote on last edited by JohanSolo
        #8

        @SGaist said:

        So basically:

        QByteArray, fileContent = myFile.readAll();
        memcpy(&hex[4], fileContent.data(), fileContent.size());
        

        ?

        I don't think so, he apparently has the binary values he's interesting in ASCII format in the file.

        `They did not know it was impossible, so they did it.'
        -- Mark Twain

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        • S Offline
          S Offline
          sachin786
          wrote on last edited by
          #9

          i have open and read this file properly in c but for storing this data in array not get it any idea...

          #include <stdio.h>
          #include <stdlib.h>
          int main()
          {
          FILE *f;
          char c;
          f=fopen("1.txt","r");
          while((c=fgetc(f))!=EOF)
          {
          printf("%c",c);
          }
          fclose(f);
          return 0;
          }

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          • jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #10

            Read the file content in a QByteArray using QFile::readAll().
            Then call split(',') on that byte array.
            You will get a list of QByteArray like:

            ["0x09","0xFF","0xD5","0x3C","0x06","0x7C","0x0A"...]
            

            Now you can loop over all the elements of the list and call QByteArray::fromHex(...).toInt() to convert from hex to integer.

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

            JohanSoloJ 1 Reply Last reply
            1
            • jsulmJ jsulm

              Read the file content in a QByteArray using QFile::readAll().
              Then call split(',') on that byte array.
              You will get a list of QByteArray like:

              ["0x09","0xFF","0xD5","0x3C","0x06","0x7C","0x0A"...]
              

              Now you can loop over all the elements of the list and call QByteArray::fromHex(...).toInt() to convert from hex to integer.

              JohanSoloJ Offline
              JohanSoloJ Offline
              JohanSolo
              wrote on last edited by
              #11

              @jsulm said:

              Read the file content in a QByteArray using QFile::readAll().
              Then call split(',') on that byte array.

              Nice idea, no need for regular expressions indeed!

              `They did not know it was impossible, so they did it.'
              -- Mark Twain

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              • S Offline
                S Offline
                sachin786
                wrote on last edited by sachin786
                #12

                ok for now i done till this.
                my file is 1.txt, which contains simply this "1A,2C,0A"

                unsigned char temp[3]={0}
                QByteArray bb("0x");
                QByteArray aa;

                QString line;
                QFile file1(filename);
                if(file1.open(QIODevice::ReadOnly | QIODevice::Text)){
                line=file1.readAll();
                QStringList strings2 = line.split(QRegExp("\W+"), QString::SkipEmptyParts);
                int n = strings2.size();

                    for(x=0;x<n;x++){
                           qDebug() << strings2.at(x) << "  ";
                           aa = strings2.at(x).toLocal8Bit();      // at this aa =1A first loop, and so on.
                           bb=bb.append(aa);    // bb= 0x1A for first loop , and so on
                           bb ="0x";                     // initialise 'bb'
                           /*
                            *
                            * in this portion is there any way  i can save value of 'bb' to my unsigned    char  temp[ ]?
                            *so that i can do something like temp[x]=bb ?? 
                            */
                
                           if(x==n) break;
                          }               
                     }
                
                1 Reply Last reply
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                • jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by jsulm
                  #13

                  It is not really clear what you want: do you want to store a character represented by the hex value or the integer value?
                  So, how should temp look after you store bb there?
                  What is this supposed to do?

                  bb=bb.append(aa);    // bb= 0x1A for first loop , and so on
                  bb ="0x";
                  

                  you first assign a value and then overwrite it with "0x".
                  Why do you need 0x?

                  In my previous post I already suggested how to convert hex string to integer.

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

                  1 Reply Last reply
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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #14

                    From your latest text sample, what about:

                    QByteArray dataFromFile = file.readAll();
                    QByteArray aa = "0x" +  dataFromFile.replace(",", "");
                    

                    But as @jsulm asked, what is your final goal with these data ?

                    Interested in AI ? www.idiap.ch
                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                    1 Reply Last reply
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                    • S Offline
                      S Offline
                      sachin786
                      wrote on last edited by sachin786
                      #15
                      1. I have a file with hex values saved as hex.txt which has
                        0x04,0x2C,0x64,0x00,0xB6,0x03,0xFA,0x84,0x87,0x6A,0x74,0x18,0x01,0x64,0x79,0x13,0x09,0x6A,0xCB,0xED,0x3D,0x9C,0x79,0x88,0x49,0x4A,0x2E,0xE8,0x89,0x24,0xF7,0xDD,0x04,0xA9,0x09,0xE7,0xE5,0x14,0xF7,0x5B,0xC5,0x49,0x38,0x10,0xFA,0x5C,0xFA,0x99,0xC4,0x0D,0x74,0xE0,0x3A,0x45,0xE8,0x64,0xCC,0xBB,0x72,0x57,0x31,0x63,0xF9,0x7F,0x46,0x48,0xF4,0xE8,0x91,0x5B,0xF8,0xED,0x07,0x9B,0x09,0x07,0x0D,0x64,0xF7,0x64,0xC7,0x5A,0xB8,0x17,0xCD,0xBC,0x6A,0xA9,0xC3,0x9D,0xEF,0x96,0x9D,0x62,0xF5,0xDD,0x83,0xD9,0x45,0x0F,0x99,0x4B,0xF6,0x63,0x41,0x29,0x38,0xE0,0x4A,0xCD,0xF9,0x94,0xC3,0x1D,0xAE,0xB8,0x96,0x3D,0x69,0x82,0x8C,0xFF,0x29,0xF9,0x2A,0xF6,0x85,0x50,0x45,0x1A,0x7E,0xF8,0x26,0x66,0x86,0x43,0x48,0x4B,0x3E,0xF9,0x96,0xD4,0x6A,0x33,0xC3,0x6B,0x75,0xFD,0x29,0x95,0xAA,0x27,0xC4,0xBD,0xF7,0x0F,0x99,0x1D,0xEB,0x9C,0x84,0xFB,0x7B,0xF8,0x4D,0x3A,0xFA,0x12,0x43,0xC9,0x43,0x0F,0x66,0x52,0xF7,0x6F,0x87,0x4A,0x36,0xE9,0xD5,0x84,0x8B,0x9A,0x8B,0xFF,0xC1,0x0F,0x2D,0x25,0x8B,0x99,0xCE,0xFE,0xC3,0xFF,0x0E,0xC9,0xF8,0x88,0x83,0xD9,0x83,0xD8,0x5D,0x91,0xF5,0x76,0xC7,0x3A,0xF8,0xE0,0x86,0x71,0xF7,0x7C,0x04,0x3A,0xFA,0xD8,0x95,0x69,0x4B,0x8F,0xC5,0xFA,0xFB,0xEF,0xBD,0x19,0xF6,0x05,0xC6,0xB8,0x7B,0x16,0xD5,0x71,0xF6,0x7D,0x46,0xD7,0xB7,0xC0,0xE5,0x11,0xF7,0x75,0x04,0x4A,0x3A,0xE1,0x72,0xD9,0x4B,0x96,0x89,0xFF,0xFF,0xDF,0x82,0xF2,0xF4,0x65,0x44,0x3B,0xB8,0xF0,0xF9,0xF9,0x43,0x50,0xC4,0x9D,0xFE,0x37,0x62,0xB8,0xA7,0x88,0x43,0xE9,0xC1,0xEF,0xB5,0x50,0xF7,0x87,0x85,0x17,0x40,0xE8,0x01,0x98,0x4A,0x86,0xC7,0xF7,0xFF,0x0F,0x31,0x38,0x4A,0x0B,0x44,0x38,0x7E,0xF8,0x59,0xE8,0x49,0x8B,0xC3,0xD9,0xFF,0xEF,0x72,0xE0,0x4A,0x0C,0xC7,0x29,0x3E,0xF8,0x45,0x33,0x7C,0x1B,0x02,0xDA,0x3F,0xF8,0xB1,0xF8,0x45,0x80,0x44,0x19,0xBE,0xE0,0xD6,0xC8,0x45,0x04,0xC3,0xF9,0x05,0x1F,0xA1,0x6B,0x7C,0x94,0xC3,0xF7,0xFB,0x0F,0xA3,0x2F,0x3F,0x11,0x27,0x42,0xF7,0x44,0x1F,0x65,0x62,0x52,0x42,0x4A,0x34,0x22,0x13,0x21,0x54,0x18,0x22,0x85,0xFF,0x43,0x32,0xB8,0xA5,0xF7,0xFF,0x12,0xF2,0x1F,0xC1,0x68,0x48,0x86,0x2F,0x22,0xF8,0x26,0x23,0xFF,0x0F,0xF6,0xFF,0x3F,0x77,0x45,0x1F,0x1F,0x17,0xF4,0x74,0x34,0x36,0x73,0x3F,0x26,0xF2,0x1F,0x6F,0x92,0x41,0xF7,0xFF,0x77,0xA6,0xF4,0x8F,0x4F,0xF4,0xF9,0x33,0x75,0x32,0xF4,0xF1,0xF8,0xF1,0x1F,0x8F,0x46,0x36,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xA2,0xE4
                        total is 498 bytes

                      2)Now I need to copy this 498 bytes values (same to same) to below array at a particular position starting from [8] to [498]

                      given the array in that array i want to store above text file data.....
                      unsigned char hex[508]={
                      0x5A,0xA5,0x0B,0x01,0xF4,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
                      0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};

                      kshegunovK 1 Reply Last reply
                      0
                      • jsulmJ Offline
                        jsulmJ Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by
                        #16
                        temp[x]=static_cast<unsigned char>(QByteArray::fromHex(bb).toInt());
                        

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

                        1 Reply Last reply
                        0
                        • S sachin786
                          1. I have a file with hex values saved as hex.txt which has
                            0x04,0x2C,0x64,0x00,0xB6,0x03,0xFA,0x84,0x87,0x6A,0x74,0x18,0x01,0x64,0x79,0x13,0x09,0x6A,0xCB,0xED,0x3D,0x9C,0x79,0x88,0x49,0x4A,0x2E,0xE8,0x89,0x24,0xF7,0xDD,0x04,0xA9,0x09,0xE7,0xE5,0x14,0xF7,0x5B,0xC5,0x49,0x38,0x10,0xFA,0x5C,0xFA,0x99,0xC4,0x0D,0x74,0xE0,0x3A,0x45,0xE8,0x64,0xCC,0xBB,0x72,0x57,0x31,0x63,0xF9,0x7F,0x46,0x48,0xF4,0xE8,0x91,0x5B,0xF8,0xED,0x07,0x9B,0x09,0x07,0x0D,0x64,0xF7,0x64,0xC7,0x5A,0xB8,0x17,0xCD,0xBC,0x6A,0xA9,0xC3,0x9D,0xEF,0x96,0x9D,0x62,0xF5,0xDD,0x83,0xD9,0x45,0x0F,0x99,0x4B,0xF6,0x63,0x41,0x29,0x38,0xE0,0x4A,0xCD,0xF9,0x94,0xC3,0x1D,0xAE,0xB8,0x96,0x3D,0x69,0x82,0x8C,0xFF,0x29,0xF9,0x2A,0xF6,0x85,0x50,0x45,0x1A,0x7E,0xF8,0x26,0x66,0x86,0x43,0x48,0x4B,0x3E,0xF9,0x96,0xD4,0x6A,0x33,0xC3,0x6B,0x75,0xFD,0x29,0x95,0xAA,0x27,0xC4,0xBD,0xF7,0x0F,0x99,0x1D,0xEB,0x9C,0x84,0xFB,0x7B,0xF8,0x4D,0x3A,0xFA,0x12,0x43,0xC9,0x43,0x0F,0x66,0x52,0xF7,0x6F,0x87,0x4A,0x36,0xE9,0xD5,0x84,0x8B,0x9A,0x8B,0xFF,0xC1,0x0F,0x2D,0x25,0x8B,0x99,0xCE,0xFE,0xC3,0xFF,0x0E,0xC9,0xF8,0x88,0x83,0xD9,0x83,0xD8,0x5D,0x91,0xF5,0x76,0xC7,0x3A,0xF8,0xE0,0x86,0x71,0xF7,0x7C,0x04,0x3A,0xFA,0xD8,0x95,0x69,0x4B,0x8F,0xC5,0xFA,0xFB,0xEF,0xBD,0x19,0xF6,0x05,0xC6,0xB8,0x7B,0x16,0xD5,0x71,0xF6,0x7D,0x46,0xD7,0xB7,0xC0,0xE5,0x11,0xF7,0x75,0x04,0x4A,0x3A,0xE1,0x72,0xD9,0x4B,0x96,0x89,0xFF,0xFF,0xDF,0x82,0xF2,0xF4,0x65,0x44,0x3B,0xB8,0xF0,0xF9,0xF9,0x43,0x50,0xC4,0x9D,0xFE,0x37,0x62,0xB8,0xA7,0x88,0x43,0xE9,0xC1,0xEF,0xB5,0x50,0xF7,0x87,0x85,0x17,0x40,0xE8,0x01,0x98,0x4A,0x86,0xC7,0xF7,0xFF,0x0F,0x31,0x38,0x4A,0x0B,0x44,0x38,0x7E,0xF8,0x59,0xE8,0x49,0x8B,0xC3,0xD9,0xFF,0xEF,0x72,0xE0,0x4A,0x0C,0xC7,0x29,0x3E,0xF8,0x45,0x33,0x7C,0x1B,0x02,0xDA,0x3F,0xF8,0xB1,0xF8,0x45,0x80,0x44,0x19,0xBE,0xE0,0xD6,0xC8,0x45,0x04,0xC3,0xF9,0x05,0x1F,0xA1,0x6B,0x7C,0x94,0xC3,0xF7,0xFB,0x0F,0xA3,0x2F,0x3F,0x11,0x27,0x42,0xF7,0x44,0x1F,0x65,0x62,0x52,0x42,0x4A,0x34,0x22,0x13,0x21,0x54,0x18,0x22,0x85,0xFF,0x43,0x32,0xB8,0xA5,0xF7,0xFF,0x12,0xF2,0x1F,0xC1,0x68,0x48,0x86,0x2F,0x22,0xF8,0x26,0x23,0xFF,0x0F,0xF6,0xFF,0x3F,0x77,0x45,0x1F,0x1F,0x17,0xF4,0x74,0x34,0x36,0x73,0x3F,0x26,0xF2,0x1F,0x6F,0x92,0x41,0xF7,0xFF,0x77,0xA6,0xF4,0x8F,0x4F,0xF4,0xF9,0x33,0x75,0x32,0xF4,0xF1,0xF8,0xF1,0x1F,0x8F,0x46,0x36,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xA2,0xE4
                            total is 498 bytes

                          2)Now I need to copy this 498 bytes values (same to same) to below array at a particular position starting from [8] to [498]

                          given the array in that array i want to store above text file data.....
                          unsigned char hex[508]={
                          0x5A,0xA5,0x0B,0x01,0xF4,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
                          0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};

                          kshegunovK Offline
                          kshegunovK Offline
                          kshegunov
                          Moderators
                          wrote on last edited by kshegunov
                          #17

                          @sachin786
                          Judging from your C code you don't have a text file at all but rather a binary file where the characters are saved. Assuming this is the case you read the data into a byte array (as already suggested) and just copy the relevant parts into a new byte array.

                          QFile inputFile("myFileName.txt", QFile::ReadOnly);
                          if (!inputFile.open())
                              ; //< Handle open errors here
                          
                          QByteArray binary = inputFile.readAll();   //< binary contains the file now
                          
                          unsigned char hex[508]; //< This is your array
                          
                          qint32 start = 4, size = 498;
                          ::memcpy(hex + start, binary.constData(), size); //< Copy the binary data
                          

                          If, on the other hand, you indeed have a text file as shown in the above post, then you read the text into a string (as already suggested yet again) and split by the comma separator. You then convert the resulting strings into one byte integers and copy them over to the new byte array.

                          QFile inputFile("myFileName.txt", QFile::ReadOnly | QFile::Text);
                          if (!inputFile.open())
                              ; //< Handle open errors here
                          
                          QTextStream in(&inputFile);
                          QString text = in.readAll();   //< text contains the file now
                          
                          QStringList bytes = text.split(',');  //< Split the text into bytes
                          
                          QByteArray binary; //< Prepare the byte array
                          binary.reserve(bytes.size());
                          
                          bool ok = true;
                          foreach (QString byte, bytes)  {
                              unsigned char hexChar = byte.toInt(&ok, 0); //< Convert string to integer according to C-style rules
                              if (!ok)
                                  ; //< Error while converting, handle accordingly
                          
                              binary.append(hexChar); //< Append the char to the byte array
                          }
                          
                          // And finally, copy the data:
                          
                          unsigned char hex[508]; //< This is your array
                          
                          qint32 start = 4, size = 498;
                          ::memcpy(hex + start, binary.constData(), size); //< Copy the binary data
                          

                          EDIT: Alternatively the last snippet could be modified so you can save the data directly while converting:

                          QFile inputFile("myFileName.txt", QFile::ReadOnly | QFile::Text);
                          if (!inputFile.open())
                              ; //< Handle open errors here
                          
                          QTextStream in(&inputFile);
                          QString text = in.readAll();   //< text contains the file now
                          
                          QStringList bytes = text.split(',');  //< Split the text into bytes
                          
                          bool ok = true;
                          
                          qint32 start = 4, size = 498;
                          for (qint32 i = 0, bytesNumber = bytes.size(), offset = start; i < bytesNumber && i < size; i++, offset++)  {
                              unsigned char hexChar = byte.toInt(&ok, 0); //< Convert string to integer according to C-style rules
                              if (!ok)
                                  ; //< Error while converting, handle accordingly
                          
                              hex[offset] = hexChar;
                          }
                          

                          Read and abide by the Qt Code of Conduct

                          1 Reply Last reply
                          1
                          • S Offline
                            S Offline
                            sachin786
                            wrote on last edited by
                            #18

                            @kshegunov thanks for reply...
                            #include "qtquick1applicationviewer.h"
                            #include <QApplication>
                            #include <QtCore>
                            #include <QDebug>
                            int main(int argc, char *argv[])
                            {
                            QApplication app(argc, argv);

                            QtQuick1ApplicationViewer viewer;
                            viewer.addImportPath(QLatin1String("modules"));
                            viewer.setOrientation(QtQuick1ApplicationViewer::ScreenOrientationAuto);
                            viewer.setMainQmlFile(QLatin1String("qrc:/main.qml"));
                            viewer.showExpanded();
                            
                            
                            bool ok = true;
                            QString filename="/home/anas/myQtApp/sachin2hex/hex.txt";
                            QFile inputFile(filename);
                            QByteArray binary; //< Prepare the byte array
                            QStringList bytes;
                            int i=0;
                            
                            unsigned char hex[508]={0x5A,0xA5,0x0B,0x01,0xF4,0x01,0x00,0x00,....position from[4] to [498] bytes data ///  << same as mention above
                            
                            if(inputFile.open(QIODevice::ReadOnly | QIODevice::Text)){
                                QTextStream in(&inputFile);
                                QString text = in.readAll();   //< text contains the file now
                            
                                bytes = text.split(',');
                                qDebug() << "bytes :: " << bytes;
                            
                                binary.reserve(bytes.size());
                            
                                foreach (QString byte, bytes)  {
                                    unsigned char hexChar = byte.toInt(&ok, 0); //< Convert string to integer according to C-style rules
                                    if (!ok)
                                        ; //< Error while converting, handle accordingly
                            
                                    binary.append(hexChar); //< Append the char to the byte array
                                }
                            
                                qint32 start = 4, size = 498;
                                ::memcpy(hex + start, binary.constData(), size); //< Copy the binary data
                            
                            
                            }
                            
                            for(i=0;i<508;i++) printf("%c", hex[i]);
                            
                            return app.exec();
                            

                            }

                            it print garbage for hex[ ]......

                            kshegunovK 1 Reply Last reply
                            0
                            • S sachin786

                              @kshegunov thanks for reply...
                              #include "qtquick1applicationviewer.h"
                              #include <QApplication>
                              #include <QtCore>
                              #include <QDebug>
                              int main(int argc, char *argv[])
                              {
                              QApplication app(argc, argv);

                              QtQuick1ApplicationViewer viewer;
                              viewer.addImportPath(QLatin1String("modules"));
                              viewer.setOrientation(QtQuick1ApplicationViewer::ScreenOrientationAuto);
                              viewer.setMainQmlFile(QLatin1String("qrc:/main.qml"));
                              viewer.showExpanded();
                              
                              
                              bool ok = true;
                              QString filename="/home/anas/myQtApp/sachin2hex/hex.txt";
                              QFile inputFile(filename);
                              QByteArray binary; //< Prepare the byte array
                              QStringList bytes;
                              int i=0;
                              
                              unsigned char hex[508]={0x5A,0xA5,0x0B,0x01,0xF4,0x01,0x00,0x00,....position from[4] to [498] bytes data ///  << same as mention above
                              
                              if(inputFile.open(QIODevice::ReadOnly | QIODevice::Text)){
                                  QTextStream in(&inputFile);
                                  QString text = in.readAll();   //< text contains the file now
                              
                                  bytes = text.split(',');
                                  qDebug() << "bytes :: " << bytes;
                              
                                  binary.reserve(bytes.size());
                              
                                  foreach (QString byte, bytes)  {
                                      unsigned char hexChar = byte.toInt(&ok, 0); //< Convert string to integer according to C-style rules
                                      if (!ok)
                                          ; //< Error while converting, handle accordingly
                              
                                      binary.append(hexChar); //< Append the char to the byte array
                                  }
                              
                                  qint32 start = 4, size = 498;
                                  ::memcpy(hex + start, binary.constData(), size); //< Copy the binary data
                              
                              
                              }
                              
                              for(i=0;i<508;i++) printf("%c", hex[i]);
                              
                              return app.exec();
                              

                              }

                              it print garbage for hex[ ]......

                              kshegunovK Offline
                              kshegunovK Offline
                              kshegunov
                              Moderators
                              wrote on last edited by
                              #19

                              @sachin786

                              it print garbage for hex[ ]......

                              What do you expect to be printed exactly? The data is binary so any of the elements that can't be displayed will be printed as gibberish ... 0x01, 0x00 are non-printable characters, so you'd see (depending on the platform) squares or other strange symbols, this doesn't necessarily mean the data is corrupted, only that it's interpreted in a erroneous way.

                              Read and abide by the Qt Code of Conduct

                              1 Reply Last reply
                              1

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