TTComp archive data decompressor

The TTDecomp utility will decompress files that are identified by the Unix file command as “TTComp archive data”.

Usage: ttdecomp infile outfile

Note that the TTComp archive data format is used by some libraries/utilities as a wrapper for multiple files. The TTDecomp utility does not parse the internal content of the input file; it simply decompresses the archive into the output file.

Some other utilities that handle such archives include:

• i3comp (InstallShield 3.x Compression and Maintenance utility); part of WinPack
• lawine (Starcraft/Brood War Library)
• PKZIP (for its own "inflate" method)
• STIX (for InstallShield 3 - Archives and self-extracting executables)

If the output of TTDecomp is not directly usable then you should check if one of these other utilities can make sense of the archive.

Download

Source	ttdecomp.tgz
Mac OS X executable	ttdecomp
Windows executable	ttdecomp.exe

---

Technical details

The actual decompression is performed in implode.c, which is found in the Starcraft/Brood War Library. The following files are from that library:

• implode.c
• common.c
• common.h

The library is licensed under the GNU Lesser GPL.

For all of these files I had to remove Unicode characters in order for them to compile using older versions of gcc.

I also changed some system include file references to local references. For example, from:
  #include <common.h>
to:
  #include "common.h" /* changed from <common.h> by Tony Lewis */

All such changes are indicated with a comment including my name.

Note that gcc version 3.2.2 emits a warning for implode.c:

  implode.c: In function `implode':
  implode.c:124: warning: `copy_off' might be used uninitialized in this function

Since ttdecomp does not call the implode function, this warning can be safely ignored.

Shannon-Fano coding

The compression algorithm is an example of Shannon-Fano coding.

---

Send me reports of any errors or suggestions you have about my tools.

---

The utility described on this page is Copyright 2012 Tony Lewis <tlewis@exelana.com>.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.