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Committer's note: this is heavily modified from the original code
contributed by woz (and somewhat improved by bill and aciidz). Copyright
notices reflect joint authorship accordingly. woz still gets commit
authorship though because it feels wrong to yoink that from someone. :^)
And yes, the original code was written in 2022. Time flies.
A lot of the code is still kind of hacky and ugly and I'd like to
improve it later but there's other things to do so that can wait.
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This isn't totally ideal - it'd be nice to have a way to get colours
working, at least for errors/warnings. But it might not really be
possible to do that without custom networking stuff, so this will do for
the forseeable future. The main goal is just to be able to have
CON_SERVERSIDE commands actually give output to the relevant player.
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Restricted to L4D for now due to known ABI compatibility issues on other
branches. This should be easy to fix later when needed elsewhere.
Committer's note: I've counted myself as a joint author and added a
copyright notice to the .c file since this code is reasonably
modified from the code bill originally wrote last year.
but June of this year and , so I've gone ahead and
corrected his copyright notice too, with permission.
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This removes the horrible janky old KeyValues parser and replaces it
with a couple of trivial ad-hoc text parsers. In doing so, make the
format of the actual gamedata files more human-friendly too.
We also gain support for nested SendTables in mkentprops, which are
required to get at various things like player velocity. And, the actual
string matching is made more efficient (or, at least, more scalable) by
way of a cool radix tree thing which generates a bunch of switch cases
on distinct characters.
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- As much as possible avoid dragging system headers into translation
units. This should avoid namespace pollution and, hopefully, speed up
builds a little bit.
- Avoid leaning on the UCRT so much on Windows - prefer native win32
calls and native file handles except where doing so is inconvenient
(in particular, for stat(), which we might try and replace later).
- Also, switch from SystemFunction036 to ProcessPrng on Windows. This
requires us to generate a stub for bcryptprimitives.dll because
Microsoft haven't bothered to provide a link library, but the function
is better-documented and seems to be a more direct under-the-hood call
as well. Apparently it's what's used by the major web browsers these
days, which seems like a good indication it's stable and trusted.
- Lastly, remove a bunch of functions and macros and stuff that weren't
actually being used. It seems good to try and keep the scope of
OS-dependent stuff relatively contained and only add to it when
actually required.
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Currently only supports Orange Box and Left 4 Dead branches. There's
quite a large amount of gamedata involved in making this work, and
figuring it out for the likes of Portal 2 doesn't seem like a major
priority at the moment.
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Of course, this has only been used at build time for quite a while now.
Silly oversight!
The linker would have dropped it anyway so this will just avoid some
wasted effort.
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Avoids spurious and confusing fast-forward behaviour in the event of
resetting a run, then disconnecting early and deciding to load some
other map.
Also fixes a stupid typo (s/propand/propane/).
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This will be mostly useful for skipping cutscenes in Left 4 Dead games.
It may work in other games, but probably won't really be as useful.
Committer's note: this was adapted a fair bit from woz's original code,
hence the joint copyright, but he did most the hard work of figuring out
how to get this deep into the engine's call stack. Thanks!
bill also provided a fair bit of help figuring out missing gamedata and
fixing compatibility with L4D2 2147 and later. Also thanks!
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- Add a couple of overdue -Werrors that make life easier
- Reshuffle cc/ld flags a bit, mainly around -fuse-ld=lld
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Nothing really works yet, but at least test.h and fastspin are fixed and
some of the issues with RTTI and libdl and stuff are maybe kind of
sorted, subject to more testing later.
The main issue now seems to be the cvar interface not quite lining up
and crashing pretty much immediately. That'll probably take a lot more
debugging to figure out, which likely still won't be a priority for
quite a while.
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A lot of this is random WIP from a while back, at least a month ago, and
is being committed now to get it out of the way so that other patches
can be brought in and integrated against it without causing headaches.
Also rolled into this commit is a way to distinguish plugin_unload from
exiting the game. This is required for another soon-to-be-integrated
feature to avoid crashing on exit, and could in theory also be used to
speed up unloading on exit in future. While we're at it, this also
avoids the need to linearly scan through the plugin list to do the
old branch unloading fix, because we can.
Rough summary of the other smaller stuff I can remember doing:
- Rework bitbuf a bit
- Add some cryptographic nonsense in ac.c (not final at all)
- Introduce the first couple of "chunklets" libraries as a sort-of
subproject of this one
- Tidy up random small bits and bobs
- Add source for a small keypair generation tool
- Rework democustom to be very marginally more useful
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This is kind of a breaking change but the other code was obviously never
released or relied on by anyone - it will be pushed at the same time as
this in fact. It still seems worth having the original committed
separately to show the progression of development of the feature,
however. Technically the standalone vote cooldown resetting could also
be added back if ever desired however there doesn't seem to be that much
of a use case for that at the moment.
This feature ought to be a lot more convenient now as it allows for
resetting back to a set starting point no matter where the player is in
a run. It isn't universally useful as All Campaigns Legacy solo runs
require switching to a different type of server and Main Campaigns co-op
runs require restarting the game after Swamp Fever to work around the
god mode bug, however it is still useful in a good few situations.
Unfortunately this turned out to be pretty complex to implement, first
requiring a bunch of interop with valve's rather wacky KeyValues stuff,
and then requiring a bunch of especially difficult reverse engineering
of L4D1 v1.0.0.5 because it doesn't use said KeyValues stuff and does
something else completely different instead.
A side effect of all this work is that the nag removal hack is now part
of the KeyValues stuff in kvsys.c, which is kind of a comfier place for
it than just kind of dumped in the middle of sst.c.
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In most versions of L4D2, players cannot call a vote (e.g. switch
campaign, change difficulty, restart campaign) more than once every 3
minutes. This makes resetting on a first map a pain, usually requiring
reloading the map to reset the vote state.
This new sst_l4d_vote_cooldown_reset command empties the list of
structures tracking vote callers, allowing all players to vote again
immediately. This should make resetting runs a lot easier on versions
without unlimited votes.
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Another big one. Here's a list of things:
- Since the upcoming C23 standardises typeof(), use it as an extension
for the time being in order to allow passing arbitrary types as
macro/codegen parameters. It wouldn't have been a big leap to do this
even without standardisation since it's apparently an easy extension
to implement - and also, to be honest, this project is essentially glued
to Clang anyway so who cares.
- Likewise, bool, true and false are becoming pre-defined, so
pre-pre-define them now in order to get the benefit of not having to
remember one header everywhere.
- Really ungodly/amazing vcall macro stuff now allows us to call C++
virtual functions like regular C functions. It's pretty cool!
- Events can now take arbitrary parameters and come in two types:
regular events and predicates.
All this makes the base code even uglier but makes the feature
implementation nicer. In other words, it places more of the cognitive
burden on myself and less on other people who might want to contribute.
This is a good tradeoff, because I'm a genius.
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This is for somewhat later. I'd always planned to use it - it existed
already in earlier private repos, in fact. I just didn't bother to
import it here in case it wouldn't actually be needed, but with the way
current plans are going, it's definitely going to be needed, so here it
is.
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Copyright note: the stuff Bill wrote is all still in the other file.
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Also centralise NEXT_INSN macro, into its own header at least for now.
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Some of the alias stuff was kind of stolen from earlier figuring-out
Bill did. More Bill code is also on the way. :^)
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Currently only works in 3420 and 5135 and uses hardcoded offsets with a
byte pattern sanity check. Future work includes making it more widely
compatible, and also doing the crazy thing I wanted to do but gave up on
wherein the actual textures and stuff get patched in memory to sync up
all the colours.
Oh also, a couple of vtables were erroneously made executable, so I went
ahead and fixed that while I was at it.
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This was a lot more code than expected, but it might be finally close to
time to release the next beta...
We'll see if any more rabbit holes present themselves to jump into,
though.
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- A bunch of stuff is now defined in one header, engineapi.h
- engineapi.c is responsible for setting up any interfaces/stuff that's
used in more than one place
- mkgamedata is pretty much rewritten and now supports nested
conditionals
- gamedata variables no longer have the gamedata_ prefix because it was
just annoyingly long all the time
- vcall macros are somewhat revamped and support dynamic (gamedata)
indices
- Portal 1 FOV can be set anywhere from 75-120 using fov_desired -
tested in both the main versions currently used by runners
- A few typos were also fixed ("intput," "writeable," "indexes")
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Default gamedata values actually work the way they're supposed to now.
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hook_inline() uses the new x86_len() function to get instruction lengths
instead of doing full-blown disassembly, which should be a tiny bit
quicker, and also removes the next for about 90KiB of lookup tables and
such in the final binary. The code-digging logic in demorecord is also
rewritten to be opcode-based rather than mnenmonic based. In general,
going forward the plan is to always rely on opcodes and thus avoid a
bunch of disassembly work every plugin load.
udis86 is still in the tree for now to provide dbg_asmdump(), but it's
only compiled into debug builds and left out of releases completely. As
such, the whole BSD licence statement is also gone from the distribution
LICENCE files. There's now also a dbg_toghidra() which spits out a
rebased address to look stuff up for proper reverse engineering, which
might be more useful than dbg_asmdump() anyway. If nobody ends up using
the latter ever again, udis86 could get chucked completely. We'll see.
Also shoehorned into this commit are a couple more forgotten copyright
year bumps and some general minor cleanup here and there, because I
couldn't be bothered wading through all the diff hunks. Oh, and
makebindist.bat now makes an effort to make the zip file timestamps
predictable/reproducible. That should be a different commit for sure,
but oh well too bad.
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They're still temporary, I promise, but this will make tweaking the
toolchain or turning debug builds on and off a lot simpler.
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Important note: it doesn't WORK on Linux, and there's tons of warnings
and stuff, but it's easier to work on when all the compiler output and
whatnot is there.
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SST itself doesn't build, but it's a start!
Really interesting is the declaration after a switch label. That's of
course invalid, but Clang on Windows never complained. I guess it's an
MSVC extension, eh? How annoying.
Also, haha yes the script wasn't even executable. Forgot to
update-index when I remade the repo, I guess...
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This is done through a new "fixes" file which will probably become one
of those silly dumping grounds that every project has to have somewhere
to put random miscellaneous crap in.
These are mainly hidden in L4D2 but they just get unilaterally unhidden
if they exist, just to be sure they're accessible.
As a bonus, it turns out that unhiding a single cvar also allows us to
set sv_cheats 1 in Left 4 Dead 2, bringing an end to the need to port-
forward a listen server for co-op practice.
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With code from Bill. Thanks Bill!
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