Class ASCII85OutputStream

  • All Implemented Interfaces:
    java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable, ASCII85Constants, Finalizable

    public class ASCII85OutputStream
    extends java.io.FilterOutputStream
    implements ASCII85Constants, Finalizable
    This class applies a ASCII85 encoding to the stream.
    Version:
    $Id: ASCII85OutputStream.java 1804124 2017-08-04 14:13:54Z ssteiner $
    • Constructor Summary

      Constructors 
      Constructor Description
      ASCII85OutputStream​(java.io.OutputStream out)  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      private void checkedWrite​(byte[] buf)  
      private void checkedWrite​(byte[] buf, boolean nosplit)  
      private void checkedWrite​(byte[] buf, int len)  
      private void checkedWrite​(byte[] buf, int len, boolean nosplit)  
      void close()  
      private byte[] convertWord​(long word)
      This converts a 32 bit value (4 bytes) into 5 bytes using base 85.
      void finalizeStream()
      This method can be called instead of close() on a subclass of FilteredOutputStream when a final marker has to be written to the target stream, but close() cannot be called.
      void write​(int b)  
      • Methods inherited from class java.io.FilterOutputStream

        flush, write, write
      • Methods inherited from class java.io.OutputStream

        nullOutputStream
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • pos

        private int pos
      • buffer

        private long buffer
      • posinline

        private int posinline
      • bw

        private int bw
    • Constructor Detail

      • ASCII85OutputStream

        public ASCII85OutputStream​(java.io.OutputStream out)
        See Also:
        FilterOutputStream
    • Method Detail

      • write

        public void write​(int b)
                   throws java.io.IOException
        Overrides:
        write in class java.io.FilterOutputStream
        Throws:
        java.io.IOException
        See Also:
        FilterOutputStream
      • checkedWrite

        private void checkedWrite​(byte[] buf)
                           throws java.io.IOException
        Throws:
        java.io.IOException
      • checkedWrite

        private void checkedWrite​(byte[] buf,
                                  boolean nosplit)
                           throws java.io.IOException
        Throws:
        java.io.IOException
      • checkedWrite

        private void checkedWrite​(byte[] buf,
                                  int len)
                           throws java.io.IOException
        Throws:
        java.io.IOException
      • checkedWrite

        private void checkedWrite​(byte[] buf,
                                  int len,
                                  boolean nosplit)
                           throws java.io.IOException
        Throws:
        java.io.IOException
      • convertWord

        private byte[] convertWord​(long word)
        This converts a 32 bit value (4 bytes) into 5 bytes using base 85. each byte in the result starts with zero at the '!' character so the resulting base85 number fits into printable ascii chars
        Parameters:
        word - the 32 bit unsigned (hence the long datatype) word
        Returns:
        5 bytes (or a single byte of the 'z' character for word values of 0)
      • finalizeStream

        public void finalizeStream()
                            throws java.io.IOException
        Description copied from interface: Finalizable
        This method can be called instead of close() on a subclass of FilteredOutputStream when a final marker has to be written to the target stream, but close() cannot be called.
        Specified by:
        finalizeStream in interface Finalizable
        Throws:
        java.io.IOException - In case of an IO problem
        See Also:
        Finalizable
      • close

        public void close()
                   throws java.io.IOException
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
        Overrides:
        close in class java.io.FilterOutputStream
        Throws:
        java.io.IOException
        See Also:
        FilterOutputStream