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:
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