.HA Archive problems
 

I'd never before heard of a .HA file. I found one recently that I was unable to open with any program I'd found. I looked around and dug some more and discovered a program called HA that was made for dos that would extract it, however, what I would appreciate is if someone could write a program in C that would do it for me, so that this could be ported to practically an platform, here's all the info I could dig up on .HA files, and I can supply a few if anyone would like to take a stab at this.


Stolen from a file somewhere on the internet:

HA 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.
--------------------------------------------

HA files (not to be confused with HamarSoft's HAP

files [3]) contain a
small archive header with a word count of the

number of files in the
archive. The constituent files stored sequentially

with a header followed
by the compressed data, as is with most archives.

The main file header is formatted as follows:
OFFSET Count TYPE Description
0000h 2 char ID='HA'
0002h 1 word Number of files in

archive

Every compressed file has a header before it, like

this :

OFFSET Count TYPE Description
0000h 1 byte Version &

compression type
0001h 1 dword Compressed file

size
0005h 1 dword Original file size
0009h 1 dword CCITT CRC-32 (same

as ZModem/PkZIP)
000Dh 1 dword File time-stamp

(Unix format)
? ? char ASCIIZ pathname
? ? char ASCIIZ filename
????h 1 byte Length of machine

specific information
? byte Machine specific

information

Note that the path separator for pathnames is the

0FFh (255) character.

The high nybble of the version & compression type

field contains the
version information (0=HA 0.98), the low nybble is

the compression type :

(Table 0012)
HA compression types
0 "CPY" File is stored (no

compression)
1 "ASC" Default compression

method, using a sliding
window dictionary

with an arithmetic coder.
2 "HSC" Compression using a

"finite context [sic]
model and

arithmetic coder"
14 "DIR" Directory entry
15 "SPECIAL" Used with HA 0.99B

(?)


Machine specific information known:

1 byte Machine type (Host-OS)

1 = MS DOS
2 = Linux (Unix)

? bytes Information (currently only

file-attribute info)

EXTENSION:HA
OCCURENCES:PC, Linux
PROGRAMS:HA
REFERENCE:

-=-=End File=-=-

I wish everyone well.