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

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.

   Field Summary

   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

   Constructor Detail

   QInputStream

   public QInputStream(java.io.InputStream in)

   Constructor.

   Parameters:

   in - the underlying input stream.

   Method Detail

   read

   public int read()
            throws java.io.IOException

   Read a character.

   Overrides:

   read in class QPInputStream

   Throws:

   java.io.IOException