SQZ Format
Intel byte order

Information from File Format List 2.0 by Max Maischein.

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If you notice any mistakes or omissions, please let me know!  It is only
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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.
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The SQZ files are yet another archive format. The SQZ archives consist of one
archive header and several file headers. The archive header has the
following format :
OFFSET              Count TYPE   Description
0000h                   5 char   ID='HLSQZ'
0005h                   1 char   Version in ASCII
                                 ID='1'
0006h                   1 byte   OS byte,
                                  0 - PC-DOS / MS-DOS
                                  1 - OS/2
                                  2 - MVS
                                  3 - HPFS (OS/2)
                                  4 - Amiga
                                  5 - Macintosh
                                  6 - Unix
0007h                   1 byte   Misc. flags, bitmapped :
                                  0 - Intel byte order / Motorola byte order
                                  1 - Filetime in ?? / File time in DOS format
                                  2 - No security envelope / security envelope
                                3-7 - reserved

After the header and each block, there is one byte denoting the type/size of the
next block :
OFFSET              Count TYPE   Description
0000h                   1 byte   Block/size specifier :
                                 0 - End of archive
                                 1 - Comment
                                 2 - Password
                                 3 - Security envelope
                              4-18 - reserved
                               >18 - normal file header,
                                     byte value is size of header

The normal file header then has the following format :
OFFSET              Count TYPE   Description
0000h                   1 byte   Checksum of header
0001h                   1 byte   Flags, bitmapped :
                                 0-3 : Compression method :
                                         0 -
                                         1 -
                                         2 -
                                         3 -
                                         4 -
                                   4 - Security envelope should follow
                                 5-7 - reserved
0002h                   1 dword  Compressed size of file
0006h                   1 dword  Original file size
000Ah                   1 dword  Date and time of file (see table 0009)
000Eh                   1 byte   File attributes
000Fh                   1 dword  CRC-32 of file
0013h                   ? char   Filename (see above for length)

The comment block :
OFFSET              Count TYPE   Description
0000h                   1 word   Size of uncompressed comment
0002h                   1 word   Size of compressed comment data
                                 ="LEN"
0004h                   1 byte   Flags, bitmapped, see above
0005h                   1 dword  CRC-32
0009h               "LEN" byte   Compressed comment data

The password block :
OFFSET              Count TYPE   Description
0000h                   1 word   Size of password block (=4)
0004h                   1 dword  CRC-32 of password

Other blocks :
OFFSET              Count TYPE   Description
0000h                   1 word   Size of this block
                                 ="LEN"
0002h               "LEN" byte   Block data

EXTENSION:SQZ
OCCURENCES:PC
PROGRAMS:??
REFERENCE:
SEE ALSO: