add some basic filesystem stuff and client/ui script callbacks

1 files changed, 53 insertions, 0 deletions

diff --git a/NorthstarDedicatedTest/filesystem.cpp b/NorthstarDedicatedTest/filesystem.cpp
new file mode 100644
index 00000000..135201b6
--- /dev/null
+++ b/NorthstarDedicatedTest/filesystem.cpp
@@ -0,0 +1,53 @@
+#include "pch.h"
+#include "filesystem.h"
+#include "hooks.h"
+#include "hookutils.h"
+#include "sourceinterface.h"
+
+// hook forward declares
+typedef FileHandle_t(*ReadFileFromVPKType)(VPKData* vpkInfo, __int64* b, const char* filename);
+ReadFileFromVPKType readFileFromVPK;
+FileHandle_t ReadFileFromVPKHook(VPKData* vpkInfo, __int64* b, const char* filename);
+
+typedef bool(*ReadFromCacheType)(IFileSystem* filesystem, const char* path, void* result);
+ReadFromCacheType readFromCache;
+bool ReadFromCacheHook(IFileSystem* filesystem, const char* path, void* result);
+
+SourceInterface<IFileSystem>* g_Filesystem;
+
+void InitialiseFilesystem(HMODULE baseAddress)
+{
+	g_Filesystem = new SourceInterface<IFileSystem>("filesystem_stdio.dll", "VFileSystem017");
+
+	// create hooks
+	HookEnabler hook;
+	ENABLER_CREATEHOOK(hook, (char*)baseAddress + 0x5CBA0, &ReadFileFromVPKHook, reinterpret_cast<LPVOID*>(&readFileFromVPK));
+	ENABLER_CREATEHOOK(hook, (*g_Filesystem)->m_vtable->ReadFromCache, &ReadFromCacheHook, reinterpret_cast<LPVOID*>(&readFromCache));
+}
+
+bool ShouldReplaceFile(const char* path)
+{
+	return false;
+}
+
+FileHandle_t ReadFileFromVPKHook(VPKData* vpkInfo, __int64* b, const char* filename)
+{
+	// move this to a convar at some point when we can read them in native
+	//spdlog::info("ReadFileFromVPKHook {} {}", filename, vpkInfo->path);
+	if (ShouldReplaceFile(filename))
+	{
+		*b = -1;
+		return b;
+	}
+
+	return readFileFromVPK(vpkInfo, b, filename);
+}
+
+bool ReadFromCacheHook(IFileSystem* filesystem, const char* path, void* result)
+{
+	// move this to a convar at some point when we can read them in native
+	//spdlog::info("ReadFromCacheHook {}", path);
+
+
+	return readFromCache(filesystem, path, result);
+}
\ No newline at end of file