Unfortunately necessary because Ion Fury savegames store 120 GB(!!) of data, mostly zeros.
Unlike the old method, this compresses the entire savegame as one block using a ZLib stream so it should be a lot more efficient now.
For main resource data this is probably unnecessary - most resources are never cached with the exception of sounds and textures, which are loaded permanently anyway.
But for hardware textures this is different. Due to the poor precaching it is impossible to selectively evict hardware textures that are not needed any longer, so for this an MRU cache is really needed so that they do not accumulate and congest the video RAM in the process.
That's one more third party dependency down.
Not only are two hashing algorithms redundant, there was also a large size discrepancy: SuperFastHash is 3 kb of source code while xxhash is 120kb and generally extremely awful code.
It was easy to make a choice here. None of the use cases require this kind of performance tweaking, the longest hashed block of data is a 768 byte palette.
Unfortunately this means that looking up ID 0 can be a bit more costly than the rest because all ID-less entries in RFF files also use 0.
For other file types -1 is used.
It's still not active but now should produce correct results when working inside the file system.
What it is missing is a file scanner that picks the data it needs to process.
- disabled the user maps menu because it is hopelessly dependent on functionality that cannot be fixed. Better wait until the menu refactor to do it right - it'd be a waste of time fixing the current menus.
* saving of demos and savegames no longer mindlessly writes to the mod directory. All such access is now being rerouted through the special paths interface so that the game data can reside in write protected locations.
* refactored all occurences of klistpath except fnlist_getnames.
* do not allow CON scripts to write to arbitrary files. This is a massive exploit and can be used to cause real damage if someone knows how to play this thing - it's far easier than people may think! It will now write any such data to a special section in the main config which is safe and cannot be manipulated to write to random locations on the hard drive.
* reroute several error conditions to I_Error.
* removed some soon-to-be obsolete GRP loading code.
* explicitly trigger the SetDefaults script events which depended on side effects from the config implementation.
* removed the nonsensical file system switch. All this does is create instabilities because it is non-obvious from where data is loaded. If a resource is mounted, it should be checked for content no matter what. While this may affect the stray weird mod out there it is a necessity if we want to allow transparent project repackaging.
The idea here is to completely merge the resource management into the file system so that Blood's DICTNODE is merely an alias to the internal FResourceLump.
A two-tiered resource system is not something I consider worthwile, it made sense to get around Builds crappy cache but in the long term this is not a good solution for a multi-game port to have a resource management system in the backend and another one put over it in the front end, both with their own caching logic that might interfere with each other. Better merge it into one that can handle everything.
The Steam/GOG path getters were taken out of the frontends.
This also switches the Windows directory reader touse the wide string version to get Unicode file names.
Some paths were added to the config file instead of hard coding them.
