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import java.io.*;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.taskdefs.MatchingTask;


public class CopyrightInsertionTask extends MatchingTask
{
  private static final String copyrightStringPart1_ = "Copyright (C) ";
  private static final String copyrightStringPart2_ = "1997-2019";
  private static final String copyrightStringPart3_ = " International Business Machines Corporation and others.";
  private static final String copyrightString_ = copyrightStringPart1_ + copyrightStringPart2_ + copyrightStringPart3_;
  private static final int copyrightStringLength_ = copyrightString_.length();

  private boolean verbose_;

  private File destDir_;  // directory where the *.class files are located

  private int numFilesProcessed_ = 0; // count of class files processed
  private int numFilesStamped_ = 0; // count of class files stamped
  private int numFilesAlreadyStamped_ = 0; // count of class files already stamped

  public void setDestdir(File destDir)
  {
    destDir_ = destDir;
  }

  public void setVerbose(boolean verbose)
  {
    verbose_ = verbose;
  }


  // Executes the task.
  public void execute() throws BuildException
  {
    DirectoryScanner scanner = getDirectoryScanner(destDir_);
    String[] classFileNames = scanner.getIncludedFiles();

    for (int i=0; i 0x7F) // not a single-byte char
        {
          i++;
          byte b = (byte)bytes[i];
          validate(b);
          if (b > 0xBF) // not a double-byte char
          {
            i++;
            byte c = (byte)bytes[i];
            validate(c);
            ch = ((a & 0xf) << 12) + ((b & 0x3f) << 6) + (c & 0x3f);
          }
          else // is a double-byte
          {
            ch = ((a & 0x1f) << 6) + (b & 0x3f);
          }
        }
        else // is a single-byte
        {
          ch = a;
        }
        name.append((char)ch);
        i++;
      }
      name_ = name.toString();
    }

    private /*static*/ void validate(byte x)
    {
      if (x==0x0 || x>=0xf0)
        throw new NullPointerException("Invalid byte: "+x);
    }
  }

}