Encoding a Series of Messages Using the Stream-Oriented C++ Control Class Interface

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Encoding a series of messages using the stream-oriented C++ control class is similar to the C method of encoding. All that is necessary is to create a loop in which EncodeTo or Encode methods will be called (or the overloaded << streaming operator). It is also possible to call different EncodeTo methods (or Encode or operator <<) one after another. An example showing how to do this is as follows:

   #include employee.h         // include file generated by ASN1C
 

 
   int main ()
 
   {
 
      const ASN1OCTET* msgptr;
 
      ASN1OCTET msgbuf[1024];
 
      int       msglen;
 
      const char* filename = "message.dat"
 

 
      try {
 
         // step 1: construct stream object. 
 

 
         ASN1BERFileOutputStream out (filename);
 

 
         try {
 

 
   
 
            // step 2: construct ASN1C C++ generated class.
 

 
            ASN1T_PersonnelRecord msgData;
 
            ASN1C_PersonnelRecord employee (msgData);
 

 
            for (;;) {
 
               // step 3: populate msgData structure with data to be
 
               // encoded. (note: this uses the generated assignment
 
               // operator to assign a string).
 

 
               employee.msgData.name = "SMITH";
 
               ...
 

 
               // step 4: invoke << operator or EncodeTo method
 

 
               out << employee; 
 
               // or employee.EncodeTo (out); can be used here.
 

 
               if (trace) {
 
                   printf ("Encoding was successful\n");
 
               }
 
            }
 
         }
 
      catch (ASN1RTLException& ex) {
 
            printf ("Encoding failed. Status = %i\n",
 
            ex.getStatus());
 
            out.printErrorInfo ();
 

 
            ...error processing...
 

 
            exit (-1);
 
         }
 
      }
 
      catch (ASN1RTLException& ex) {
 
        printf ("Exception thrown: Status = %i\n", ex.getStatus());
 
        return -1;
 
      }
 
   }