content: /*
   * Copyright (C) 2010 Ken Ellinwood
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package apksigner.io;
  
  import java.io.IOException;
  import java.io.OutputStream;
  import java.util.zip.CRC32;
  import java.util.zip.Deflater;
  import java.util.zip.DeflaterOutputStream;
  
  public class ZioEntryOutputStream extends OutputStream {
      int size = 0;  // tracks uncompressed size of data
      CRC32 crc = new CRC32();
      int crcValue = 0;
      OutputStream wrapped;
      OutputStream downstream;
      
      public ZioEntryOutputStream( int compression, OutputStream wrapped) 
      {
          this.wrapped = wrapped;
          if (compression != 0)
              downstream = new DeflaterOutputStream( wrapped, new Deflater( Deflater.BEST_COMPRESSION, true));
          else downstream = wrapped;
      }
      
      public void close() throws IOException {
          downstream.flush();
          downstream.close();
          crcValue = (int)crc.getValue();
      }
  
      public int getCRC() {
          return crcValue;
      }
      
      public void flush() throws IOException {
          downstream.flush();
      }
  
      public void write(byte[] b) throws IOException {
          downstream.write(b);
          crc.update(b);
          size += b.length;
      }
  
      public void write(byte[] b, int off, int len) throws IOException {
          downstream.write( b, off, len);
          crc.update( b, off, len);
          size += len;
      }
  
      public void write(int b) throws IOException {
          downstream.write( b);
          crc.update( b);
          size += 1;
      }
  
      public int getSize() {
          return size;
      }
  
      public OutputStream getWrappedStream()
      {
          return wrapped;
      }
      
  }
  
  