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-rw-r--r--NorthstarDLL/keyvalues.cpp137
1 files changed, 137 insertions, 0 deletions
diff --git a/NorthstarDLL/keyvalues.cpp b/NorthstarDLL/keyvalues.cpp
new file mode 100644
index 00000000..2063be62
--- /dev/null
+++ b/NorthstarDLL/keyvalues.cpp
@@ -0,0 +1,137 @@
+#include "pch.h"
+#include "keyvalues.h"
+#include "modmanager.h"
+#include "filesystem.h"
+#include "hookutils.h"
+
+#include <fstream>
+
+// hook forward defs
+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);
+
+void InitialiseKeyValues(HMODULE baseAddress)
+{
+ HookEnabler hook;
+ ENABLER_CREATEHOOK(
+ hook, (char*)baseAddress + 0x426C30, &KeyValues__LoadFromBufferHook, reinterpret_cast<LPVOID*>(&KeyValues__LoadFromBuffer));
+}
+
+void* savedFilesystemPtr;
+
+char KeyValues__LoadFromBufferHook(void* self, const char* resourceName, const char* pBuffer, void* pFileSystem, void* a5, void* a6, int a7)
+{
+ // 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)
+ savedFilesystemPtr = pFileSystem;
+ if (!pFileSystem && !strcmp(resourceName, "playlists"))
+ pFileSystem = savedFilesystemPtr;
+
+ 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 = fs::path(filename).lexically_normal().string();
+ 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 = 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));
+ rootName[63] = '\0';
+
+ // 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;
+} \ No newline at end of file