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[Solved]Convert ASCII hex to int

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  • L Offline
    L Offline
    leon.anavi
    wrote on last edited by
    #4

    [quote author="Ivan1120" date="1378819542"]Thanks : )[/quote]

    You are welcome :) Please edit the title of the thread and add [SOLVED] as a prefix.

    http://anavi.org/

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    • L Offline
      L Offline
      Leopold
      wrote on last edited by
      #5

      @leon.anavi said in [Solved]Convert ASCII hex to int:

      bool bStatus = false;

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      • L Offline
        L Offline
        Leopold
        wrote on last edited by VRonin
        #6

        Hello,
        i have simular problem:
        i have a txt file with hex values in it, i want ro read them and store in a qvector.When I use your code I get error in qlist.h
        this is part of my code:

        				{
        								 bool bStatus = false;
                                         qDebug() << line;
        								 QStringList fields = line.split(' ');
        							     x.append(tick);
                                         tick++;
                                    
                                         y1.append(fields.at(1).toUInt(&bStatus,16));
                                         y2.append(fields.at(1).toUInt(&bStatus,16));
                                         y3.append(fields.at(1).toUInt(&bStatus,16));
        
        aha_1980A 1 Reply Last reply
        0
        • L Leopold

          Hello,
          i have simular problem:
          i have a txt file with hex values in it, i want ro read them and store in a qvector.When I use your code I get error in qlist.h
          this is part of my code:

          				{
          								 bool bStatus = false;
                                           qDebug() << line;
          								 QStringList fields = line.split(' ');
          							     x.append(tick);
                                           tick++;
                                      
                                           y1.append(fields.at(1).toUInt(&bStatus,16));
                                           y2.append(fields.at(1).toUInt(&bStatus,16));
                                           y3.append(fields.at(1).toUInt(&bStatus,16));
          
          aha_1980A Offline
          aha_1980A Offline
          aha_1980
          Lifetime Qt Champion
          wrote on last edited by
          #7

          Hi @Leopold,

          Unfortunately you didn't tell us which error you got.

          Nevertheless, there are several (potential) problems in your code.

          1. You split line in a QStringList fields, but don't check if the list contains more than one element before calling at(1). This can crash.
          2. You have a variable bStatus and give it to as Parameter to toUInt(), but don't check the value of bStatus
          3. You call the sequence fields.at(1).toUInt(&bStatus,16) three times. I'd store the result in a temporary value to avoid this duplication

          Regards

          Qt has to stay free or it will die.

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          • L Offline
            L Offline
            Leopold
            wrote on last edited by
            #8

            Hello,
            the error is a hint to line 531 in qlist.h
            "{ Q_ASSERT_X(i >= 0 && i < p.size(), "QList<T>::at", "index out of range");"
            I know the fields are always the same so the number of y is the same too.Giving the same value to three different vectors in a while loop should not be the problem. But I will change that.

            aha_1980A 1 Reply Last reply
            0
            • L Leopold

              Hello,
              the error is a hint to line 531 in qlist.h
              "{ Q_ASSERT_X(i >= 0 && i < p.size(), "QList<T>::at", "index out of range");"
              I know the fields are always the same so the number of y is the same too.Giving the same value to three different vectors in a while loop should not be the problem. But I will change that.

              aha_1980A Offline
              aha_1980A Offline
              aha_1980
              Lifetime Qt Champion
              wrote on last edited by
              #9

              @Leopold said in [Solved]Convert ASCII hex to int:

              Hello,
              the error is a hint to line 531 in qlist.h
              "{ Q_ASSERT_X(i >= 0 && i < p.size(), "QList<T>::at", "index out of range");"

              So take care to check fields.size() before calling fields.at(1). This should solve your problem.

              Qt has to stay free or it will die.

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              2
              • L Offline
                L Offline
                Leopold
                wrote on last edited by
                #10

                Hello,
                my problem seems to be the line.split
                QStringList fields = line.split(' ');
                this is a file with ' ' separation
                like "80: 1C 02 FC 85 FF 1D"

                jsulmJ 1 Reply Last reply
                0
                • L Leopold

                  Hello,
                  my problem seems to be the line.split
                  QStringList fields = line.split(' ');
                  this is a file with ' ' separation
                  like "80: 1C 02 FC 85 FF 1D"

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

                  @Leopold Can you do

                  qDebug() << line;
                  qDebug() << fields;
                  

                  and post the output here?

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

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                  1
                  • L Offline
                    L Offline
                    Leopold
                    wrote on last edited by
                    #12

                    In the meanwhile i have found how to split white space but it does not work.This is my split command:
                    QStringList fields = line.split("\s+");
                    this is qDebug()<<fields :("80: 1C 02 FC 85 FF 4F FF 1D 89 17 08 10 01 00 00 00 3B 87 69 00 82 00 48 09 88 10 00 00 ")
                    what other split commands for white space are possible?

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                    0
                    • VRoninV Offline
                      VRoninV Offline
                      VRonin
                      wrote on last edited by VRonin
                      #13
                      const QRegularExpression hexRegExp(QStringLiteral("[0-9a-fA-F]{2}(?!:)"));  // regular expression that matches 2 hex digits NOT followed by :
                      for(QRegularExpressionMatchIterator i = hexRegExp.globalMatch(line);i.hasNext();){ // iterate over all the matches
                      const QRegularExpressionMatch hexMatch = i.next();
                      qDebug() << "Hex: " << hexMatch.capturedRef(0) << " Dec: " << hexMatch.capturedRef(0).toUInt(Q_NULLPTR,16); //capturedRef contains the part matched by the regular expression
                      }
                      

                      "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                      ~Napoleon Bonaparte

                      On a crusade to banish setIndexWidget() from the holy land of Qt

                      1 Reply Last reply
                      3
                      • M Offline
                        M Offline
                        mpergand
                        wrote on last edited by mpergand
                        #14

                        Using a QByteArray is the way to go !

                        QString hex="80 1c,02:fc 85, ff* 1000";  // the separator can be any non hex char
                        QByteArray values=QByteArray::fromHex(hex.toLatin1());
                        qDebug()<<values;
                        for(quint8 c : values)  // note the quint8
                          qDebug()<<c;
                        
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                        1
                        • L Offline
                          L Offline
                          Leopold
                          wrote on last edited by VRonin
                          #15

                          @ VRonin
                          sorry , could you explain line by line, i normaly can read c-code but this is too complex and I would like to understand.On the other hand, when I put this code into mine I get a lot of errors.Here is part of my code. I have to examine first field and according to its value read the lines into different vectors.
                          i need an expression that the line will be split,every ( to me) known didn't work up to know.
                          my code:

                          if (line_count>3) // read line from line 4
                          							{
                                                          QStringList fields = line.split("[\s]+");// not working
                                                            qDebug()<<fields;// shows complete line, should be first field
                                                           Eingang.append(fields.at(0));// its a QString declared earlier
                                                           qDebug()<<Eingang;             
                                                           if( Eingang==("80:"))// then read this line
                          								{
                          								 bool bStatus = false;
                                                           qDebug() << line;
                                                           x.append(tick); // this will be x-line in a plot
                                                           tick++;
                                                      
                                                           y1.append(fields.at(1).toUInt(&bStatus,16));// one graph inplot
                                                           y2.append(fields.at(2).toUInt(&bStatus,16));// second graph in plot
                                        
                          								}
                                                          else if ( Eingang== ("7D:"))
                          								{
                                                              bool bStatus = false;
                                                              qDebug() << line;
                                                              QStringList fields = line.split("\\s+");// didn't work too
                                                              x.append(tick);
                                                              tick++;
                                                           y29.append(fields.at(1).toUInt(&bStatus,16));
                                                           y30.append(fields.at(2).toUInt(&bStatus,16));
                                               
                          								}
                          							}
                          						}		 
                          

                          and here part of the file:

                          Running command: read-raw
                          ECU responded to D0 command with: 98 00 01 02
                          
                          80: 1C 02 FC 85 FF 4F FF 1D 89 17 08 10 01 00 00 00 3B 87 69 00 82 00 48 09 88 10 00 00 
                          7D: 20 10 1C FF 92 00 A8 FF FF 01 01 7D 59 00 FF 51 FF FF 30 80 7F 7F FF 01 00 07 00 0D C0 1E 00 45 
                          80: 1C 03 0C 85 FF 4F FF 1E 89 17 08 10 01 00 00 00 3B 87 69 00 82 00 48 09 88 10 00 00 
                          7D: 20 10 1C FF 92 00 9D FF FF 01 01 7D 59 00 FF 51 FF FF 30 80 7F 6D FF 01 00 07 00 0D C0 1E 00 45 
                          80: 1C 02 F8 85 FF 4F FF 1E 89 17 08 10 01 00 00 00 3B 87 69 00 8C 00 48 09 88 10 00 00 
                          7D: 20 10 1C FF 92 00 43 FF FF 01 01 7D 58 00 FF 51 FF FF 30 80 7F 79 FF 01 00 07 00 0D C0
                          
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                          • VRoninV Offline
                            VRoninV Offline
                            VRonin
                            wrote on last edited by VRonin
                            #16

                            could you explain line by line

                            Added comments, for more info just look here: http://doc.qt.io/qt-5/qregularexpression.html#global-matching

                            On the other hand, when I put this code into mine I get a lot of errors

                            what errors? if it's because you don't support C++11 for some reason I changed the code so it works on old compilers

                            if( Eingang==("80:"))

                            add a regular expression for that too:

                            const QRegularExpression eingangExp(QStringLiteral("^\\s*([0-9a-fA-F]{2}):"));
                            const QRegularExpression hexRegExp(QStringLiteral("[0-9a-fA-F]{2}(?!:)"));
                            const QRegularExpressionMatch eingangMatch = eingangExp.match(line);
                            if(eingangMatch.hasMatch()){
                            if(eingangMatch.capturedRef(1).compare("80",Qt::CaseInsensitive)==0){ // Eingang==("80:")
                            qDebug() << "Eingang is 80";
                            for(QRegularExpressionMatchIterator i = hexRegExp.globalMatch(line);i.hasNext();){ // iterate over all the matches
                            const QRegularExpressionMatch hexMatch = i.next();
                            qDebug() << "Hex: " << hexMatch.capturedRef(0) << " Dec: " << hexMatch.capturedRef(0).toUInt(Q_NULLPTR,16); //capturedRef contains the part matched by the regular expression
                            }
                            }
                            else if(eingangMatch.capturedRef(1).compare("7D",Qt::CaseInsensitive)==0){ // Eingang==("7D:"){
                            qDebug() << "Eingang is 7D";
                            for(QRegularExpressionMatchIterator i = hexRegExp.globalMatch(line);i.hasNext();){ // iterate over all the matches
                            const QRegularExpressionMatch hexMatch = i.next();
                            qDebug() << "Hex: " << hexMatch.capturedRef(0) << " Dec: " << hexMatch.capturedRef(0).toUInt(Q_NULLPTR,16); //capturedRef contains the part matched by the regular expression
                            }
                            }
                            }
                            

                            QStringList fields = line.split("[\s]+");// not working

                            You have to tell split you are using a regexp and escape the \: QStringList fields = line.split(QRegularExpression("\\s+"));

                            "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                            ~Napoleon Bonaparte

                            On a crusade to banish setIndexWidget() from the holy land of Qt

                            1 Reply Last reply
                            1
                            • M Offline
                              M Offline
                              mpergand
                              wrote on last edited by
                              #17
                              QString line="80: 1C 02 FC 85 FF 4F FF 1D 89 17 08 10 01 00 00 00 3B 87 69 00 82 00 48 09 88 10 00 00 ";
                              QStringList fields=line.split(':');
                              qDebug()<<"en-tĂȘte:"<<fields[0];
                              QByteArray values=QByteArray::fromHex(fields[1].toLatin1());
                              qDebug()<<"data:"<<values;
                              

                              en-tĂȘte: "80"
                              data :"\x1C\x02\xFC\x85\xFFO\xFF\x1D\x89\x17\b\x10\x01\x00\x00\x00;\x87i\x00\x82\x00H\t\x88\x10\x00\x00"

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                              • L Offline
                                L Offline
                                Leopold
                                wrote on last edited by
                                #18

                                heureka
                                VRonin's code works:
                                QVector()
                                "80: 1C 02 FC 85 FF 4F FF 1D 89 17 08 10 01 00 00 00 3B 87 69 00 82 00 48 09 88 10 00 00 "
                                4
                                QRegularExpressionMatch(Valid, has match: 0:(0, 3, "80:"), 1:(0, 2, "80"))
                                "1C" 28
                                "02" 2
                                "FC" 252
                                now I have to give eyh value to the different y
                                but I think I can gigure that out.

                                @mpergand
                                this will divide first field from rest but how to divide the rest?
                                y1= field1,y2=field2 and so on
                                but I will test.

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                                0
                                • M Offline
                                  M Offline
                                  mpergand
                                  wrote on last edited by mpergand
                                  #19

                                  @Leopold said in [Solved]Convert ASCII hex to int:

                                  this will divide first field from rest but how to divide the rest?
                                  y1= field1,y2=field2 and so on
                                  but I will test.

                                  No need to split anything, you can access each byte in a QByteArray with at() or []
                                  See the doc ...

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                                  3
                                  • L Offline
                                    L Offline
                                    Leopold
                                    wrote on last edited by
                                    #20

                                    @VRonin
                                    the example works great for transforming from hex to dec but i get the same row what i have in the txt now as a vektor. In my code you see that I have different y Vektors.
                                    I need value of field1 in y1, field2 in y2 and so on.I can not figure out how to take the i into a loop with y(i).

                                    VRoninV 1 Reply Last reply
                                    0
                                    • L Leopold

                                      @VRonin
                                      the example works great for transforming from hex to dec but i get the same row what i have in the txt now as a vektor. In my code you see that I have different y Vektors.
                                      I need value of field1 in y1, field2 in y2 and so on.I can not figure out how to take the i into a loop with y(i).

                                      VRoninV Offline
                                      VRoninV Offline
                                      VRonin
                                      wrote on last edited by
                                      #21

                                      @Leopold Every time you call i.next(); it moves to the next field in order so it's quite easy to manage

                                      "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                                      ~Napoleon Bonaparte

                                      On a crusade to banish setIndexWidget() from the holy land of Qt

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                                      • L Offline
                                        L Offline
                                        Leopold
                                        wrote on last edited by
                                        #22

                                        I tried this:
                                        { // iterate over all the matches

                                        										const QRegularExpressionMatch hexMatch = i.next();
                                        										qDebug() <<  hexMatch.capturedRef(0) <<  hexMatch.capturedRef(0).toUInt(Q_NULLPTR,16); //capturedRef contains the part matched by the regular expression
                                                                                y1.append(hexMatch.capturedRef(1).toUInt(Q_NULLPTR,16));
                                                                                 y2.append(hexMatch.capturedRef(2).toUInt(Q_NULLPTR,16));
                                                                                  y3.append(hexMatch.capturedRef(3).toUInt(Q_NULLPTR,16));
                                                                                   y4.append(hexMatch.capturedRef(4).toUInt(Q_NULLPTR,16));
                                                                            }
                                        
                                        VRoninV 1 Reply Last reply
                                        0
                                        • L Leopold

                                          I tried this:
                                          { // iterate over all the matches

                                          										const QRegularExpressionMatch hexMatch = i.next();
                                          										qDebug() <<  hexMatch.capturedRef(0) <<  hexMatch.capturedRef(0).toUInt(Q_NULLPTR,16); //capturedRef contains the part matched by the regular expression
                                                                                  y1.append(hexMatch.capturedRef(1).toUInt(Q_NULLPTR,16));
                                                                                   y2.append(hexMatch.capturedRef(2).toUInt(Q_NULLPTR,16));
                                                                                    y3.append(hexMatch.capturedRef(3).toUInt(Q_NULLPTR,16));
                                                                                     y4.append(hexMatch.capturedRef(4).toUInt(Q_NULLPTR,16));
                                                                              }
                                          
                                          VRoninV Offline
                                          VRoninV Offline
                                          VRonin
                                          wrote on last edited by
                                          #23

                                          @Leopold said in [Solved]Convert ASCII hex to int:

                                          { // iterate over all the matches

                                          Look at that comment. Do you see what you are doing wrong?

                                          "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                                          ~Napoleon Bonaparte

                                          On a crusade to banish setIndexWidget() from the holy land of Qt

                                          1 Reply Last reply
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