Original Documentation

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: