Extract constructor .fil files

This is a simple piece of code implemented in C to extract .fil from the constructor game. This includes most of the game videos and sounds.

Caution: This tool will extract files to the current directory

To compile: make

To use for analysis ./fil a /path/to/.fil

To use for extraction ./fil e /path/to/.fil

Many thanks to https://github.com/shlainn/game-file-formats/wiki/Constructor-.FIL-files for providing the file format