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gnu.mail.util
Class QOutputStream  

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          gnu.mail.util.QPOutputStream
              gnu.mail.util.QOutputStream

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public class QOutputStream

extends QPOutputStream

Provides RFC 2047 "B" transfer decoding. See section 4.2:

The "Q" encoding is similar to the "Quoted-Printable" content- transfer-encoding defined in RFC 2045. It is designed to allow text containing mostly ASCII characters to be decipherable on an ASCII terminal without decoding.

1. Any 8-bit value may be represented by a "=" followed by two hexadecimal digits. For example, if the character set in use were ISO-8859-1, the "=" character would thus be encoded as "=3D", and a SPACE by "=20". (Upper case should be used for hexadecimal digits "A" through "F".)
2. The 8-bit hexadecimal value 20 (e.g., ISO-8859-1 SPACE) may be represented as "_" (underscore, ASCII 95.). (This character may not pass through some internetwork mail gateways, but its use will greatly enhance readability of "Q" encoded data with mail readers that do not support this encoding.) Note that the "_" always represents hexadecimal 20, even if the SPACE character occupies a different code position in the character set in use.
3. 8-bit values which correspond to printable ASCII characters other than "=", "?", and "_" (underscore), MAY be represented as those characters. (But see section 5 for restrictions.) In particular, SPACE and TAB MUST NOT be represented as themselves within encoded words.

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   Field Summary
   private static int	SPACE
   private  java.lang.String	specials
   private static java.lang.String	TEXT_SPECIALS
   private static int	UNDERSCORE
   private static java.lang.String	WORD_SPECIALS

    

   Fields inherited from class gnu.mail.util.QPOutputStream

    

   Fields inherited from class java.io.FilterOutputStream

   out

    

   Constructor Summary

   QOutputStream(java.io.OutputStream out, boolean word)           Constructor.

    

   Method Summary
   static int	encodedLength(byte[] bytes, boolean word)
   void	write(int c)           Write a character to the stream.

    

   Methods inherited from class gnu.mail.util.QPOutputStream

   close, flush, output, write, write

    

   Methods inherited from class java.lang.Object

   clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    

   Field Detail

   SPACE

   private static final int SPACE

   See Also:

   Constant Field Values

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   UNDERSCORE

   private static final int UNDERSCORE

   See Also:

   Constant Field Values

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   TEXT_SPECIALS

   private static java.lang.String TEXT_SPECIALS

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   WORD_SPECIALS

   private static java.lang.String WORD_SPECIALS

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   specials

   private java.lang.String specials

   Constructor Detail

   QOutputStream

   public QOutputStream(java.io.OutputStream out,
                        boolean word)

   Constructor. The word parameter is used to indicate whether the bytes passed to this stream are considered to be RFC 822 "word" tokens or "text" tokens.

   Method Detail

   write

   public void write(int c)
              throws java.io.IOException

   Write a character to the stream.

   Overrides:

   write in class QPOutputStream

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   encodedLength

   public static int encodedLength(byte[] bytes,
                                   boolean word)

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