1 files changed, 69 insertions, 0 deletions
diff --git a/primedev/core/filesystem/filesystem.h b/primedev/core/filesystem/filesystem.h
new file mode 100644
index 00000000..fcd1bb2f
--- /dev/null
+++ b/primedev/core/filesystem/filesystem.h
@@ -0,0 +1,69 @@
+#pragma once
+#include "core/sourceinterface.h"
+
+// taken from ttf2sdk
+typedef void* FileHandle_t;
+
+#pragma pack(push, 1)
+
+// clang-format off
+OFFSET_STRUCT(VPKFileEntry)
+{
+    STRUCT_SIZE(0x44);
+    FIELDS(0x0, 
+          char* directory;
+          char* filename;
+          char* extension;
+        )
+};
+// clang-format on
+#pragma pack(pop)
+
+struct VPKData;
+
+enum SearchPathAdd_t
+{
+	PATH_ADD_TO_HEAD, // First path searched
+	PATH_ADD_TO_TAIL, // Last path searched
+};
+
+class CSearchPath
+{
+public:
+	unsigned char unknown[0x18];
+	const char* debugPath;
+};
+
+class IFileSystem
+{
+public:
+	struct VTable
+	{
+		void* unknown[10];
+		void (*AddSearchPath)(IFileSystem* fileSystem, const char* pPath, const char* pathID, SearchPathAdd_t addType);
+		void* unknown2[84];
+		bool (*ReadFromCache)(IFileSystem* fileSystem, const char* path, void* result);
+		void* unknown3[15];
+		VPKData* (*MountVPK)(IFileSystem* fileSystem, const char* vpkPath);
+	};
+
+	struct VTable2
+	{
+		int (*Read)(IFileSystem::VTable2** fileSystem, void* pOutput, int size, FileHandle_t file);
+		void* unknown[1];
+		FileHandle_t (*Open)(
+			IFileSystem::VTable2** fileSystem, const char* pFileName, const char* pOptions, const char* pathID, int64_t unknown);
+		void (*Close)(IFileSystem* fileSystem, FileHandle_t file);
+		long long (*Seek)(IFileSystem::VTable2** fileSystem, FileHandle_t file, long long offset, long long whence);
+		void* unknown2[5];
+		bool (*FileExists)(IFileSystem::VTable2** fileSystem, const char* pFileName, const char* pPathID);
+	};
+
+	VTable* m_vtable;
+	VTable2* m_vtable2;
+};
+
+extern SourceInterface<IFileSystem>* g_pFilesystem;
+
+std::string ReadVPKFile(const char* path);
+std::string ReadVPKOriginalFile(const char* path);