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gnu.mail.util
Class QInputStream  

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          gnu.mail.util.QPInputStream
              gnu.mail.util.QInputStream

All Implemented Interfaces:

java.io.Closeable

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public class QInputStream

extends QPInputStream

Provides RFC 2047 "B" transfer encoding. 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	EQ
   private static int	SPACE
   private static int	UNDERSCORE

    

   Fields inherited from class gnu.mail.util.QPInputStream

   buf, spaceCount

    

   Fields inherited from class java.io.FilterInputStream

   in

    

   Constructor Summary

   QInputStream(java.io.InputStream in)           Constructor.

    

   Method Summary
   int	read()           Read a character.

    

   Methods inherited from class gnu.mail.util.QPInputStream

   available, markSupported, read

    

   Methods inherited from class java.io.FilterInputStream

   close, mark, read, reset, skip

    

   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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   EQ

   private static final int EQ

   See Also:

   Constant Field Values

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   UNDERSCORE

   private static final int UNDERSCORE

   See Also:

   Constant Field Values

   Constructor Detail

   QInputStream

   public QInputStream(java.io.InputStream in)

   Constructor.

   Method Detail

   read

   public int read()
            throws java.io.IOException

   Read a character.

   Overrides:

   read in class QPInputStream

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