SWG
From Just Solve the File Format Problem
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== Identification == | == Identification == | ||
| − | New format | + | 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}}". | ||
Revision as of 17:02, 18 February 2021
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 |
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.
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".
Specifications
- SWAG.ZIP → SWAGADD.DOC - Has partial documentation of new format.
- swg.txt - Excerpt from SWAGADD.DOC
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)
Sample files
- GARBO Shareware Archive → allswags.zip
- [3] → ALLSWAGS.ZIP
- SWAGABC.ZIP - Old format
Links
- The HTML SWAG Home Page - The contents of SWAG are available here, but maybe not in SWG format.
