From sik.the.hedgehog at gmail.com  Thu Jan  1 23:11:15 2015
From: sik.the.hedgehog at gmail.com (Sik the hedgehog)
Date: Fri, 2 Jan 2015 01:11:15 -0300
Subject: [physfs] How to check if some files got overriden?
Message-ID: <CAEyBR+U430YaYvt7tGCQZWTxg1+1gfVb6LpDb2fmGtVdtMsRwQ@mail.gmail.com>

I'm using PhysicsFS mounting to implement mods in my game (where a mod
is just an archive that overrides those in the game). I need a way to
check if some of those get altered when I add a mod though (to disable
saving, otherwise the savegame could become invalid). More
specifically, I need to see if the archive:

- Contains system/scenes
- Contains system/tweaks.ini
- Contains levels/*.sol

How can I check this? I would do the check every time I mount a mod
(not after mounting all of them), if this helps.

From indy at driftsolutions.com  Fri Jan  2 01:39:43 2015
From: indy at driftsolutions.com (Indy Sams)
Date: Fri, 2 Jan 2015 01:39:43 -0500
Subject: [physfs] How to check if some files got overriden?
In-Reply-To: <CAEyBR+U430YaYvt7tGCQZWTxg1+1gfVb6LpDb2fmGtVdtMsRwQ@mail.gmail.com>
References: <CAEyBR+U430YaYvt7tGCQZWTxg1+1gfVb6LpDb2fmGtVdtMsRwQ@mail.gmail.com>
Message-ID: <1584795287.20150102013943@driftsolutions.com>

Hello Sik,

You can try PHYSFS_getRealDir, but a better way may be to store a hash
of the relevant files or a unique string defined by the mod in your save
files  so  people  can still save even with mods and it will only load
games that match the current mod.

Best regards,
 Indy Sams
 mailto:indy at driftsolutions.com

Thursday, January 1, 2015, 11:11:15 PM, you wrote:

Sth> I'm using PhysicsFS mounting to implement mods in my game (where a mod
Sth> is just an archive that overrides those in the game). I need a way to
Sth> check if some of those get altered when I add a mod though (to disable
Sth> saving, otherwise the savegame could become invalid). More
Sth> specifically, I need to see if the archive:

Sth> - Contains system/scenes
Sth> - Contains system/tweaks.ini
Sth> - Contains levels/*.sol

Sth> How can I check this? I would do the check every time I mount a mod
Sth> (not after mounting all of them), if this helps.
Sth> _______________________________________________
Sth> physfs mailing list
Sth> physfs at icculus.org
Sth> http://icculus.org/mailman/listinfo/physfs


From sik.the.hedgehog at gmail.com  Fri Jan  2 02:44:06 2015
From: sik.the.hedgehog at gmail.com (Sik the hedgehog)
Date: Fri, 2 Jan 2015 04:44:06 -0300
Subject: [physfs] How to check if some files got overriden?
In-Reply-To: <1584795287.20150102013943@driftsolutions.com>
References: <CAEyBR+U430YaYvt7tGCQZWTxg1+1gfVb6LpDb2fmGtVdtMsRwQ@mail.gmail.com>
 <1584795287.20150102013943@driftsolutions.com>
Message-ID: <CAEyBR+WR1pkaPJ+6AQUGwozXCWqNuD4Hr9fva+gLjjMkXV-Ueg@mail.gmail.com>

2015-01-02 3:39 GMT-03:00, Indy Sams <indy at driftsolutions.com>:
> You can try PHYSFS_getRealDir, but a better way may be to store a hash
> of the relevant files or a unique string defined by the mod in your save
> files  so  people  can still save even with mods and it will only load
> games that match the current mod.

If you specify a new save filename in your own system/tweaks.ini then
the game will use that instead. The check is for mods that can
potentially corrupt the savegame but don't provide their own filename
(i.e. it's a safety check).

I thought about the hash thing, although that'd work mostly for
system/scenes and system/tweaks.ini (i.e. the two files), I'd still
need to see what's the deal with levels/*.sol (since it can be either
overwriting the current levels *or* adding new ones). But um, I guess
that adding new levels won't help if system/scenes isn't overwritten
as well (that file contains the level list), so I could just look at
the current scene list and see if those levels got overwritten.