Class java.util.UUDecoder

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Class java.util.UUDecoder

java.lang.Object
   |
   +----java.util.CharacterDecoder
           |
           +----java.util.UUDecoder

public class UUDecoder
extends CharacterDecoder

This class implements a Berkeley uu character decoder. This decoder was made famous by the uudecode program. The basic character coding is algorithmic, taking 6 bits of binary data and adding it to an ASCII ' ' (space) character. This converts these six bits into a printable representation. Note that it depends on the ASCII character encoding standard for english. Groups of three bytes are converted into 4 characters by treating the three bytes a four 6 bit groups, group 1 is byte 1's most significant six bits, group 2 is byte 1's least significant two bits plus byte 2's four most significant bits. etc. In this encoding, the buffer prefix is:

    begin [mode] [filename]

This is followed by one or more lines of the form:

	(len)(data)(data)(data) ...

where (len) is the number of bytes on this line. Note that groupings are always four characters, even if length is not a multiple of three bytes. When less than three characters are encoded, the values of the last remaining bytes is undefined and should be ignored. The last line of data in a uuencoded buffer is represented by a single space character. This is translated by the decoding engine to a line length of zero. This is immediately followed by a line which contains the word 'end[newline]' If an error is encountered during decoding this class throws a CEFormatException. The specific detail messages are:

	"UUDecoder: No begin line."
	"UUDecoder: Malformed begin line."
	"UUDecoder: Short Buffer."
	"UUDecoder: Bad Line Length."
	"UUDecoder: Missing 'end' line."

Version:: 1.1, 16 Mar 1995
Author:: Chuck McManis
See Also:: CharacterDecoder, UUEncoder

bufferName: This string contains the name that was in the buffer being decoded.
mode: Represents UNIX(tm) mode bits.

UUDecoder()

bufferName

  public String bufferName

This string contains the name that was in the buffer being decoded.

mode

  public int mode

Represents UNIX(tm) mode bits. Generally three octal digits representing read, write, and execute permission of the owner, group owner, and others. They should be interpreted as the bit groups:

(owner) (group) (others)
	rwx      rwx     rwx 	(r = read, w = write, x = execute)

UUDecoder

  public UUDecoder()

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