To read structure variable from a binary file

Hi Everyone,
Iam having a binary file created by c++.It contains structure  like this one...
struct
      char name[2];
      unsigned short num;
      char identity[4];
      double date;
      union
          byte id[4];
          int sizeconst;
          int size;
I want to read this struct file in labview. How can i do that?

Once I had the same problem, I've asked NI-support and they said to me because of different kind of reading method that that operation is impossibile to do, so the solution to solve the problem has been to create a C++ library that reads the structure from the file and makes disponible the data. After, I've called the library by "Call by library function" in my Labview software.
Ricky
Italian Developer engineer
www.www.selt-sistemi.com

Similar Messages

  • Reading an object from a binary file

    i am writing objects into my binary file using printwriter class. i am able to write objects into the file but i am having problems reading the object from the file. is there any other way of going about it. i tried using the objectoutputstream and object input stream class. but i am getting run time errors coz of something to do with serialization
    i am storing records as a object into a binary file so that it is easy to seek my records

    Of course you have trouble reading objects after you wrote them with a PrintWriter.
    You should rather have fixed the Serialization errors: only objkects that implement Serializable correctly can be serialized.

  • At end of tether!  Reading in variables from a text file

    Hi all
    My stress factor has gone through the roof because I am trying to read in from a text file (you may have seen some earlir questions about ArrayLists) it's just not working!
    The code is below. The result is that it's reading in all of the car data, none of the motorbike and only the first line for the services. It's odd and it's driving me insane!
    Here's an example of the data it's reading. There are about 7-10 sets of data per type
    <car><reg>AB04CDE</reg><make>Ford</make><model>Fiesta</model><colour>blue</colour><passenger_no>4</passenger_no></car>
    <service><service_no>13570</service_no><reg>J605PLE</reg><date>15:07:2006</date><miles>20000</miles><part_replaced>brake_pads</part_replaced><part_replaced>front_tyres</part_replaced></service>
    <motorbike><reg>TT05EKJ</reg><make>Triumph</make><model>Speedmaster</model><colour>black</colour><load>20.50</load></motorbike>
    Here's the code
    while (moreToRead) {
            String line;
            try {
              line = fileReader.getNextStructure();
    // collect the data from the file
              if (line.indexOf("<car>")> -1){
                // Select/Extract the registration element
                int nStart = line.indexOf("<reg>");
                int nEnd = line.indexOf("</reg>");
                String reg = line.substring(nStart+5,nEnd);
                // Select/Extract the make element
                nStart = line.indexOf("<make>");
                nEnd = line.indexOf("</make>");
                String make = line.substring(nStart+6,nEnd);
                // Select/Extract the model element
                nStart = line.indexOf("<model>");
                nEnd = line.indexOf("</model>");
                String model = line.substring(nStart+7,nEnd);
                // Select/Extract the colour element
                nStart = line.indexOf("<colour>");
                nEnd = line.indexOf("</colour>");
                String colour = line.substring(nStart+8,nEnd);
                // Select/Extract the passenger_no element
                nStart = line.indexOf("<passenger_no>");
                nEnd = line.indexOf("</passenger_no>");
                String passenger_no = line.substring(nStart+14,nEnd);
                //convert string to int
                int passengerInt = Integer.parseInt(passenger_no);
                // declare new object car and assign the variables then add it to the array.
                Car c = new Car (reg, make, model, colour, passengerInt);
                carList.add(c);
      } else if (line.indexOf("<bike>")> -1) {
             // Select/Extract the registration element
             int nStart = line.indexOf("<reg>");
             int nEnd = line.indexOf("</reg>");
             String reg = line.substring(nStart+5,nEnd);
             // Select/Extract the make element
             nStart = line.indexOf("<make>");
             nEnd = line.indexOf("</make>");
             String make = line.substring(nStart+6,nEnd);
             // Select/Extract the model element
             nStart = line.indexOf("<model>");
             nEnd = line.indexOf("</model>");
             String model = line.substring(nStart+7,nEnd);
             // Select/Extract the colour element
             nStart = line.indexOf("<colour>");
             nEnd = line.indexOf("</colour>");
             String colour = line.substring(nStart+8,nEnd);
             // Select/Extract the load element
             nStart = line.indexOf("<load>");
             nEnd = line.indexOf("</load>");
             String load = line.substring(nStart+6,nEnd);
             //convert load string to double
             double bikeLoad = Double.parseDouble(load);
             // declare new object motorbike and assign the variables then add it to the array.
             Motorbike m = new Motorbike (reg, make, model, colour, bikeLoad);
             bikeList.add(m);
      } else  {
        // Select/Extract the service_number element
        int nStart = line.indexOf("<service_no>");
        int nEnd = line.indexOf("</service_no>");
        String service_no = line.substring(nStart+12,nEnd);
        console.println("service = " + service_no);
        nStart = line.indexOf("<reg>");
        nEnd = line.indexOf("</reg>");
        String reg = line.substring(nStart+5,nEnd);
        console.println("service = " + reg);
        nStart = line.indexOf("<date>");
        nEnd = line.indexOf("</date>");
        String date = line.substring(nStart+6,nEnd);
        console.println("service = " + date);
        nStart = line.indexOf("<miles>");
        nEnd = line.indexOf("</miles>");
        String miles = line.substring(nStart+7,nEnd);
        console.println("service = " + miles);
        nStart = line.indexOf("<part_replaced>");
        nEnd = line.indexOf("</part_replaced>");
        String part_replaced = line.substring(nStart+15,nEnd);
        console.println("service = " + part_replaced);
        //convert string to int
        int dateOfService = Integer.parseInt(date);
        //convert string to double
        double milesAtService = Double.parseDouble(miles);
        //convert service no to unique int
        int serviceNo = Integer.parseInt(service_no);
        // declare new object service and assign the variables then add it to the array.
        Service s = new Service (reg, part_replaced, serviceNo, dateOfService, milesAtService);
          serviceList.add(s);
          catch (Exception e) {
            // Run out of data
            moreToRead = false;
    } If anyone can spy anything that could be causing this I love your advice. I simply can't see it.
    Jo

    hi jos,
    we have been asked not to use a parser for this assignment. evil
    tutor i think! lolYour example seems to imply that all the <tag> ... </tag> pairs have
    to occur on a single line; if that is so, you can do some cheap
    programming like this:String getText(String line, String tag) {
       int start= line.indexOf("<"+tag+">");
       int end= line.indexOf("</"+tag+">", start);
       if (start < 0 || end < 0) return null; // no <tag> ... </tag> pair found
       // return the text in between the <tag> ... </tag> tags
       return line.substring(start+tag.length()+2, end);
    }kind regards,
    Jos

  • Within JBuilder, Reading Environment Variable From a BATCH File

    Hi ppl:
    Following my scenario without JBuilder. I would like to be able to do the same with JBuilder, so that I can run my application from within.
    1. In the DOS window, I run a config.bat file that sets up a whole bunch of environment variables and then calls another script file that sets up another whole bunch to set up environment for a third party API (C++ based).
    2. My application uses native methods to call the third party API which uses the environment variables set in step 1.
    I know how to set the environment varialbes in JBuilder (Project Parameters, VM). However, I don't know how I can call a batch file that does the same. I don't want to set up the third party variables in JBuilder manually, since the script that sets them up checks on a few things to customize the environment.
    I also know how to run a batch file from JBuilder, but that does not set the environment for the application. It seems like the batch file is run in a separate process.
    Any ideas?
    Kamran

    It seems like the batch file is run in a separate process.Yes, it is. That's a design feature of Windows. The environment variables that a process creates are available to any subprocess, but when the process ends, the environment variables vanish. That's because they are part of the process, not global variables as you might wish.
    So that's why your non-JBuilder scenario works; your C++ program is running in a subprocess of the process that defined the environment variables. And your JBuilder scenario doesn't work because the batch file it runs is in a process whose parent process is Windows, not JBuilder.

  • How to read configuration data from an xml file (not web.xml)?

    Hi,
    I want to separate the application specific configuration parameters in a separate xml file and read them as and when they are needed? I know that I can use the wb.xml but I want to separate them in a different xml file because I don't want the web.xml file to be played around later after deployment. If any change is needed then it should be done in the application-config.xml.
    How can I read the parameters from this xml file in my jsp code and also what should be the location of this file if I have
    ../webapps/Root/application
    directoty structure ?
    Any help is greatly appreciated.

    can you give an example of a property file and also
    it is loaded in the jsp ?Hmm... loading properties in a JSP is not a very good idea. You should do it in a separate class, rather than mixing the logic with the display logic.
    Properties properties = new Properties();
    properties.load(UtilClass.class.getResourceAsStream("config.properties"));
    // Add a try - catch block around the load
    // for IOException...

  • What is the best combination of read and write objects to binary files ...

    Hi everyone,
    what are the best combination of read and write objects to read/write a record of customers from a binary file. I should be able to use StringTokenizer. I am bit confused with all these Stream reader and writers.
    abdul

    You are, indeed, confused:
    o StreamTokenizer works on character input, not binary input.
    o Readers and Writers in general work on character streams, not binary.
    That leaves you various input streams and output streams for reading binary data.

  • I have a VI and an attched .txt data file. Now I want to read the data from the .txt file and display it as an array in the front panel. But the result is not right. Any help?

    I have a VI and an attched .txt data file. Now I want to read the data from the .txt file and display it as an array in the front panel. But the result is not right. Any help?
    Attachments:
    try2.txt ‏2 KB
    read_array.vi ‏21 KB

    The problem is in the delimiters in your text file. By default, Read From Spreadsheet File.vi expects a tab delimited file. You can specify a delimiter (like a space), but Read From Spreadsheet File.vi has a problem with repeated delimiters: if you specify a single space as a delimiter and Read From Spreadsheet File.vi finds two spaces back-to-back, it stops reading that line. Your file (as I got it from your earlier post) is delimited by 4 spaces.
    Here are some of your choices to fix your problem.
    1. Change the source file to a tab delimited file. Your VI will then run as is.
    2. Change the source file to be delimited by a single space (rather than 4), then wire a string constant containing one space to the delimiter input of Read From Spreadsheet File.vi.
    3. Wire a string constant containing 4 spaces to the delimiter input of Read From Spreadsheet File.vi. Then your text file will run as is.
    Depending on where your text file comes from (see more comments below), I'd vote for choice 1: a tab delimited text file. It's the most common text output of spreadsheet programs.
    Comments for choices 1 and 2: Where does the text file come from? Is it automatically generated or manually generated? Will it be generated multiple times or just once? If it's manually generated or generated just once, you can use any text editor to change 4 spaces to a tab or to a single space. Note: if you want to change it to a tab delimited file, you can't enter a tab directly into a box in the search & replace dialog of many programs like notepad, but you can do a cut and paste. Before you start your search and replace (just in the text window of the editor), press tab. A tab character will be entered. Press Shift-LeftArrow (not Backspace) to highlight the tab character. Press Ctrl-X to cut the tab character. Start your search and replace (Ctrl-H in notepad in Windows 2000). Click into the Find What box. Enter four spaces. Click into the Replace With box. Press Ctrl-V to paste the tab character. And another thing: older versions of notepad don't have search and replace. Use any editor or word processor that does.

  • Reading one line from a text file into an array

    i want to read one line from a text file into an array, and then the next line into a different array. both arays are type string...i have this:
    public static void readAndProcessData(FileInputStream stream){
         InputStreamReader iStrReader = new InputStreamReader (stream);
         BufferedReader reader = new BufferedReader (iStrReader);
         String line = "";          
         try{
         int i = 0;
              while (line != null){                 
                   names[i] = reader.readLine();
                   score[i] = reader.readLine();
                   line = reader.readLine();
                   i++;                
              }catch (IOException e){
              System.out.println("Error in file access");
    this section calls it:
    try{                         
         FileInputStream stream = new FileInputStream("ISU.txt");
              HighScore.readAndProcessData(stream);
              stream.close();
              names = HighScore.getNames();
              scores = HighScore.getScores();
         }catch(IOException e){
              System.out.println("Error in accessing file." + e.toString());
    it gives me an array index out of bounds error

    oh wait I see it when I looked at the original quote.
    They array you made called names or the other one is prob too small for the amount of names that you have in the file. Hence as I increases it eventually goes out of bounds of the array so you should probably resize the array if that happens.

  • Reading Each String From a text File

    Hello everyone...,
    I've a doubt in File...cos am not aware of File.....Could anyone
    plz tell me how do i read each String from a text file and store those Strings in each File...For example if a file contains "Java Tchnology forums, File handling in Java"...
    The output should be like this... Each file should contains each String....i.e..., Java-File1,Technology-File2...and so on....Plz anyone help me

    The Java� Tutorials > Essential Classes: Basic I/O

  • Populate a table reading the data from a TXT file

    how can I populate a table reading the data from a TXT file?
    thanks

    Hey Kevin!
    Using FORMS.TEXT_IO to bulk load data from a file strikes me as re-inventing the wheel. It is just about justifiable in a self-service environment, but I regard the EXTERNAL TABLE is a better solution for that situation as well.
    The same applies to UTL_FILE. I think the ability to read text with UTL_FILE is primarily intended for read file-based configuration or file manipulation/processing rather than data loading.
    Re-writing a text file into SQL statements is too much like hard work (even with an editor that supports macro definition and regular expressions) for no real benefit. You lose all the bulk load peformance you would get from SQL*Loader. But for QAD I'd probably let you off with it.
    You missed out one obvious alternative: using Java to turn the contents of an XML file into a CLOB and inserting it into a table which is read by a PL/SQL procedure that parses the XML records and insert the retrieved data into a table.
    Stay lucky, APC

  • How to read every line from a text file???

    How can i read every line from my text file ("eka.txt")
    now it only reads the first line and prints it out.
    What is wrong with this?
    import java.io.*;
    import java.util.*;
    class Testi{
         public static void main(String []args)throws IOException {
         BufferedReader stdin=new BufferedReader(new InputStreamReader(System.in));
    File inputFile = new File ("eka.txt");
    FileReader fis =new FileReader(inputFile);
    BufferedReader bis = new BufferedReader(fis);
    String test=bis.readLine();
    String tmp= "";
    while((bis.readLine().trim() != null)) {
    int spacefound=0;
    int l=test.indexOf(" ");
         for(int i=0;i<test.length();i++){
         char c=test.charAt(i);
         if(c!=' ') tmp+=""+c;
         if(c==' ' && (spacefound<1) && !(tmp.equals(""))){
         tmp+=""+c;
         spacefound++;
         if(tmp.length()==l) {
         System.out.println(tmp);
         tmp="";
         spacefound=0;
         if(tmp.length()<l){
         for(int i=0;i<=(l-tmp.length());i++)
         tmp+=""+' ';
         System.out.println(tmp);

    Try this code, Hope it servers your purpose.
    import java.io.*;
    import java.util.*;
    class Testi {
         public static void main(String []args)throws IOException {
              BufferedReader stdin=new BufferedReader(new InputStreamReader(System.in));
              File inputFile = new File ("Eka.txt");
              FileReader fis =new FileReader(inputFile);
              BufferedReader bis = new BufferedReader(fis);
              String test=bis.readLine();
              while(test != null) {
                   StringTokenizer st = new StringTokenizer(test," ");
                   while(st.hasMoreTokens())
                        System.out.println(st.nextToken());
                   test = bis.readLine();
    }Sudha

  • How to read some lines from a text file using java.

    hi,
    i m new to java and i want to read some lines from a text file based on some string occurrence in the file. This file to be read in steps.
    we only want to read the file upto the first Occurrence of "TEXT" string.
    How to do it ,,,
    Kinldy give the code
    Regards,
    Sagar
    this is the text file
    dfgjdjj
    sfjhjkd
    ghjkdg
    hjkdgh TEXT
    ikeyt
    ujt
    jk
    tyk TEXT
    rukl
    r

    Hendawy wrote:
    Since the word "TEXT" is formed of 4 letters, you would read the text file 4 bytes by four bytes. Wrong on two counts. First, the file may not be encoded 1 byte per character. It could be utf-16 in which case it would be two byte per character. Second, even if it were 1 byte per character, the string "Text" may not start on a 4 byte boundary.
    Consider a FileInputStream object "fis" that points to your text file. use fis.read(byte[] array, int offset, int len) to read every four bytes. Convert the "TEXT" String into a byte array "TEXT".getBytes(), and yous the Arrays class to compare the equality of the read bytes with your "TEXT".getBytes()Wrong since it relies on my second point and will fail when fis.read(byte[] array, int offset, int len) does not read 4 bytes (as is no guaranteed to). Check the Javadoc. Also, the file may not be encoded with the default character encoding.
    The problem is easily solved by reading a line at a time using a BufferedReader wrapping an InputStreamReader wrapping a FileInputStream and specifying the correct character encoding.
    Edited by: sabre150 on Apr 29, 2009 2:13 PM

  • How do i read complete line from a text file in j2me?????

    how do i read complete line from a text file in j2me????? I wanna read file line by line not char by char..Even i tried with readUTF of datainputstream to read word by word but i got UTFDataFormatException.. Please solve my problem.. Thanks in advance..

    That is not my problem . i already read it char by char.. i am getting complete line..But this process is taking to much time..So thats why i directly wanna read complete line or word to save time..

  • Reading rule sets from an XML file

    Hi all,
    How can I read rule sets from an XML file? I have been given some rules in XML
    format and using those I have to query some content. I am using WLP4.0
    Also how can I code rules in java?
    Thanks in advance.

    You can have the following classes:
    Players class deriving from Vector (or containing a vector), and then
    Player class with attribute 'name'.
    class Players
               Vector myVector = new Vector();
                void addPlayer(Player p)
                      myVector.add(p);
                Player getPlayer(int index)
                      myVector.get(index);
    class Player
             private String myName = null;
             Player(String name)
                    this.myName = name;
             String getName()
                    return myName;
    }Then while handling the SAX events you can do the following:
    class MySAXHandler implements ContentHandler (or whatever the itnerface is)
                 public void startElement(String name,....)
                          Players p = null;
                          if(name.equals("Players"))
                                 p = new Players();
                         else if (name.equals("Name"))
                                p.add(new Player(value));
    }HTH,
    Kalyan.

  • How to read a table from a word file, using HWPF

    How can I read a table from a Word file using HWPF?
    I looked in API and Table class doesn't seem to have a constructor... very very strange for me. pls help

    the constructor is HWPFDocument = new HWPFDocument(/*file*/)
    Here is the API for that
    http://poi.apache.org/apidocs/org/apache/poi/hwpf/HWPFDocument.html
    Also here is another link to something that might help you more with tables
    http://www.aspose.com/Community/forums/thread/79182.aspx

Maybe you are looking for