/**
 * pnode -- a pnode identifier for provtraces.
 *
 * Captures both type and pnum.
 */
class pnode {
   enum PNODE_TYPE { FILE, PROC };

   PNODE_TYPE ptype;
   int  pnum;
   static int next_pnum = 0;

   /**
    * Create a new pnode of the specified type.
    */
   public pnode(char type) {

      switch ( type ) {
         case 'f':
            ptype = PNODE_TYPE.FILE;
            break;

         case 'p':
            ptype = PNODE_TYPE.PROC;
            break;

         default:
            System.out.println( "Unsupported pnode type: " + type );
            System.exit(-1);
      }

      pnum = next_pnum++;
   }

   public int getPnum() {
      return pnum;
   }

   public String getType() {
      switch ( ptype ) {
         case FILE:
            return"f";

         case PROC:
            return "p";
      }

      return "UNKNOWN";
   }

   public String toString() {
      return getType() + pnum;
   }
}