LZH Format
Intel byte order

Information from File Format List 2.0 by Max Maischein.

--------!-CONTACT_INFO----------------------
If you notice any mistakes or omissions, please let me know!  It is only
with YOUR help that the list can continue to grow.  Please send
all changes to me rather than distributing a modified version of the list.

This file has been authored in the style of the INTERxxy.* file list
by Ralf Brown, and uses almost the same format.

Please read the file FILEFMTS.1ST before asking me any questions. You may find
that they have already been addressed.

         Max Maischein

Max Maischein, 2:244/1106.17
Max_Maischein@spam.fido.de
corion@informatik.uni-frankfurt.de
Corion on #coders@IRC
--------!-DISCLAIMER------------------------
DISCLAIMER:  THIS MATERIAL IS PROVIDED "AS IS".  I verify the information
contained in this list to the best of my ability, but I cannot be held
responsible for any problems caused by use or misuse of the information,
especially for those file formats foreign to the PC, like AMIGA or SUN file
formats. If an information it is marked "guesswork" or undocumented, you
should check it carefully to make sure your program will not break with
an unexpected value (and please let me know whether or not it works
the same way).

Information marked with "???" is known to be incomplete or guesswork.

Some file formats were not released by their creators, others are regarded
as proprietary, which means that if your programs deal with them, you might
be looking for trouble. I don't care about this.
--------------------------------------------

The LHArc/LHA archiver is a multi platform archiver made by Haruyasu Yoshizaki,
which has a relatively good compression. It uses more or less the same
technology like the ZIP programs by Phil Katz. There was a hack named "ICE",
which had only the graphic characters displayed on decompression changed.

OFFSET              Count TYPE   Description
0000h                   1 byte   Size of archived file header
0001h                   1 byte   Checksum of remaining bytes
0002h                   3 char   ID='-lh'
                                 ID='-lz'
0005h                   1 char   Compression methods used (see table 0005)
0006h                   1 char   ID='-'
0007h                   1 dword  Compressed size
000Bh                   1 dword  Uncompressed size
000Fh                   1 dword  Original file date/time (see table 0009)
0013h                   1 word   File attribute
0015h                   1 byte   Filename / path length in bytes
                                 ="LEN"
0016h               "LEN" char   Filename / path
0018h                   1 word   CRC-16 of original file
+"LEN"

(Table 0005)
LHArc compression types
  "0" - No compression
  "1" - LZW, 4K buffer, Huffman for upper 6 bits of position
  "2" - unknown
  "3" - unknown
  "4" - LZW, Arithmetic Encoding
  "5" - LZW, Arithmetic Encoding
  "s" - LHa 2.x archive?
  "\" - LHa 2.x archive?
  "d" - LHa 2.x archive?

EXTENSION:LZH,ICE
OCCURENCES:PC
PROGRAMS:LHArc.EXE, LHA.EXE