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#include "pch.h"
#include "modmanager.h"
#include "hooks.h"
#include "filesystem.h"
#include "hookutils.h"
#include <fstream>
typedef char (*KeyValues__LoadFromBufferType)(
void* self, const char* resourceName, const char* pBuffer, void* pFileSystem, void* a5, void* a6, int a7);
KeyValues__LoadFromBufferType KeyValues__LoadFromBuffer;
char KeyValues__LoadFromBufferHook(void* self, const char* resourceName, const char* pBuffer, void* pFileSystem, void* a5, void* a6, int a7)
{
static void* pSavedFilesystemPtr = nullptr;
// this is just to allow playlists to get a valid pFileSystem ptr for kv building, other functions that call this particular overload of
// LoadFromBuffer seem to get called on network stuff exclusively not exactly sure what the address wanted here is, so just taking it
// from a function call that always happens before playlists is loaded
if (pFileSystem != nullptr)
pSavedFilesystemPtr = pFileSystem;
if (!pFileSystem && !strcmp(resourceName, "playlists"))
pFileSystem = pSavedFilesystemPtr;
return KeyValues__LoadFromBuffer(self, resourceName, pBuffer, pFileSystem, a5, a6, a7);
}
void ModManager::TryBuildKeyValues(const char* filename)
{
spdlog::info("Building KeyValues for file {}", filename);
std::string normalisedPath = g_pModManager->NormaliseModFilePath(fs::path(filename));
fs::path compiledPath = GetCompiledAssetsPath() / filename;
fs::path compiledDir = compiledPath.parent_path();
fs::create_directories(compiledDir);
fs::path kvPath(filename);
std::string ogFilePath = "mod_original_";
ogFilePath += kvPath.filename().string();
std::string newKvs = "// AUTOGENERATED: MOD PATCH KV\n";
int patchNum = 0;
// copy over patch kv files, and add #bases to new file, last mods' patches should be applied first
// note: #include should be identical but it's actually just broken, thanks respawn
for (int64_t i = m_loadedMods.size() - 1; i > -1; i--)
{
if (!m_loadedMods[i].Enabled)
continue;
size_t fileHash = STR_HASH(normalisedPath);
auto modKv = m_loadedMods[i].KeyValues.find(fileHash);
if (modKv != m_loadedMods[i].KeyValues.end())
{
// should result in smth along the lines of #include "mod_patch_5_mp_weapon_car.txt"
std::string patchFilePath = "mod_patch_";
patchFilePath += std::to_string(patchNum++);
patchFilePath += "_";
patchFilePath += kvPath.filename().string();
newKvs += "#base \"";
newKvs += patchFilePath;
newKvs += "\"\n";
fs::remove(compiledDir / patchFilePath);
fs::copy_file(m_loadedMods[i].ModDirectory / "keyvalues" / filename, compiledDir / patchFilePath);
}
}
// add original #base last, #bases don't override preexisting keys, including the ones we've just done
newKvs += "#base \"";
newKvs += ogFilePath;
newKvs += "\"\n";
// load original file, so we can parse out the name of the root obj (e.g. WeaponData for weapons)
std::string originalFile = R2FS::ReadVPKOriginalFile(filename);
if (!originalFile.length())
{
spdlog::warn("Tried to patch kv {} but no base kv was found!", ogFilePath);
return;
}
char rootName[64];
memset(rootName, 0, sizeof(rootName));
// iterate until we hit an ascii char that isn't in a # command or comment to get root obj name
int i = 0;
while (!(originalFile[i] >= 65 && originalFile[i] <= 122))
{
// if we hit a comment or # thing, iterate until end of line
if (originalFile[i] == '/' || originalFile[i] == '#')
while (originalFile[i] != '\n')
i++;
i++;
}
int j = 0;
for (int j = 0; originalFile[i] >= 65 && originalFile[i] <= 122; j++)
rootName[j] = originalFile[i++];
// empty kv, all the other stuff gets #base'd
newKvs += rootName;
newKvs += "\n{\n}\n";
std::ofstream originalFileWriteStream(compiledDir / ogFilePath, std::ios::binary);
originalFileWriteStream << originalFile;
originalFileWriteStream.close();
std::ofstream writeStream(compiledPath, std::ios::binary);
writeStream << newKvs;
writeStream.close();
ModOverrideFile overrideFile;
overrideFile.owningMod = nullptr;
overrideFile.path = normalisedPath;
if (m_modFiles.find(normalisedPath) == m_modFiles.end())
m_modFiles.insert(std::make_pair(normalisedPath, overrideFile));
else
m_modFiles[normalisedPath] = overrideFile;
}
ON_DLL_LOAD("engine.dll", KeyValues, [](HMODULE baseAddress)
{
HookEnabler hook;
ENABLER_CREATEHOOK(
hook, (char*)baseAddress + 0x426C30, &KeyValues__LoadFromBufferHook, reinterpret_cast<LPVOID*>(&KeyValues__LoadFromBuffer));
})
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