SWG

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== Format details ==
 
== Format details ==
New SWG format is based on generalized [[LHA]] format. It is approximately parsable as LHA, but the fields starting with the filename field seem to be repurposed, and it has a custom "compression scheme".
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New SWG format is a derivative of [[LHA]] format, apparently based on LHA header level 0, with an extra 165 bytes worth of headers preceding the filename field. It has a custom "<code>-sw1-</code>" compression method, the details of which are apparently undocumented.
  
 
== Identification ==
 
== Identification ==
New format files have ASCII "{{magic|-sw1-}}" at offset 2.
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New format: At offset 2 is ASCII "{{magic|-sw1-}}" (if the first member file was compressible), or "{{magic|-sw0-}}" (if not).
  
 
At least some old format files start with "{{magic|SWAGOLX.EXE}}".
 
At least some old format files start with "{{magic|SWAGOLX.EXE}}".
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== Specifications ==
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* [http://files.mpoli.fi/software/PROGRAMM/GENERAL/SWAG.ZIP SWAG.ZIP] → SWAGADD.DOC - Has partial documentation of new format.
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** [https://hwiegman.home.xs4all.nl/fileformats/swg/swg.txt swg.txt] - Excerpt from SWAGADD.DOC
  
 
== Software ==
 
== Software ==
* [http://files.mpoli.fi/software/PROGRAMM/GENERAL/] → swag.zip - GDSOFT SWAG Packet Reader v3.13 (DOS software)
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* [http://files.mpoli.fi/software/PROGRAMM/GENERAL/] → SWAG.ZIP - GDSOFT SWAG Packet Reader v3.13 (DOS software)
** Note that the Reader is also included in the allswags.zip file.
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** Note that the Reader is also included in the ALLSWAGS.ZIP file.
* [http://files.mpoli.fi/software/PROGRAMM/GENERAL/] → swagwin.zip - SWAG for WINDOWS, v1.04
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* [http://files.mpoli.fi/software/PROGRAMM/GENERAL/] → SWAGWIN.ZIP - SWAG for WINDOWS, v1.04
 
* {{CdTextfiles|monstmedia/PROG/PASCAL/SWAG.ZIP|SWAG.ZIP}} - Maybe the first version (DOS software)
 
* {{CdTextfiles|monstmedia/PROG/PASCAL/SWAG.ZIP|SWAG.ZIP}} - Maybe the first version (DOS software)
  
 
== Sample files ==
 
== Sample files ==
 
* [https://archive.org/details/2012.11.24.ftp-garbo-mirror GARBO Shareware Archive] → allswags.zip
 
* [https://archive.org/details/2012.11.24.ftp-garbo-mirror GARBO Shareware Archive] → allswags.zip
* [http://files.mpoli.fi/software/PROGRAMM/PASCAL/] → allswags.zip
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* [http://files.mpoli.fi/software/PROGRAMM/PASCAL/] → ALLSWAGS.ZIP
 
* {{CdTextfiles|monstmedia/PROG/PASCAL/SWAGABC.ZIP|SWAGABC.ZIP}} - Old format
 
* {{CdTextfiles|monstmedia/PROG/PASCAL/SWAGABC.ZIP|SWAGABC.ZIP}} - Old format
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* https://telparia.com/fileFormatSamples/archive/swagPacket/
  
 
== Links ==
 
== Links ==

Latest revision as of 22:51, 16 September 2021

File Format
Name SWG
Ontology
Extension(s) .swg
Released 1993?

SWG (SWAG packet) is a specialized archive format associated with the SourceWare Archival Group (SWAG). SWAG is a historical collection of Pascal source code.

There are at least two different SWG formats, which we'll call "old" and "new".

Contents

[edit] Format details

New SWG format is a derivative of LHA format, apparently based on LHA header level 0, with an extra 165 bytes worth of headers preceding the filename field. It has a custom "-sw1-" compression method, the details of which are apparently undocumented.

[edit] Identification

New format: At offset 2 is ASCII "-sw1-" (if the first member file was compressible), or "-sw0-" (if not).

At least some old format files start with "SWAGOLX.EXE".

[edit] Specifications

  • SWAG.ZIP → SWAGADD.DOC - Has partial documentation of new format.
    • swg.txt - Excerpt from SWAGADD.DOC

[edit] Software

  • [1] → SWAG.ZIP - GDSOFT SWAG Packet Reader v3.13 (DOS software)
    • Note that the Reader is also included in the ALLSWAGS.ZIP file.
  • [2] → SWAGWIN.ZIP - SWAG for WINDOWS, v1.04
  • SWAG.ZIP - Maybe the first version (DOS software)

[edit] Sample files

[edit] Links

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