Move interface stuff to utility file.

* Alternative method to using dlopen and dlsym.

* Accepts partial version strings.

Signed-off-by: aixxe <me@aixxe.net>

include/cstrike/Classes/Interface.h

@@ -1,11 +0,0 @@
-#pragma once
-
-typedef void* (*CreateInterfaceFn) (const char*, int*);
-typedef void* (*InstantiateInterfaceFn) ();
-
-class InterfaceReg {
-	public:
-		InstantiateInterfaceFn m_CreateFn;
-		const char* m_pName;
-		InterfaceReg* m_pNext;
-};

src/Utilities/Interfaces.h

@@ -0,0 +1,30 @@
+#pragma once
+
+typedef void* (*InstantiateInterfaceFn) ();
+
+class InterfaceReg {
+	public:
+		InstantiateInterfaceFn m_CreateFn;
+		const char* m_pName;
+		InterfaceReg* m_pNext;
+};
+
+inline const InterfaceReg* GetInterfaces(const char* library) {
+	// Find the pointer to the 'InterfaceReg::s_pInterfaceRegs' linked list - same on all game libraries.
+	uintptr_t interface_list_addr = FindPattern(library, "\x89\x10\x8B\x15\x00\x00\x00\x00\xA3", "xxxx????x");
+	
+	if (interface_list_addr)
+		return **reinterpret_cast<InterfaceReg***>(interface_list_addr + 4);
+
+	return nullptr;
+}
+
+template <typename T> inline T* GetInterface(const char* library, const char* partial_version) {
+	for (const InterfaceReg* current = GetInterfaces(library); current; current = current->m_pNext) {
+		if (std::string(current->m_pName).find(partial_version) != std::string::npos) {
+			return reinterpret_cast<T*>(current->m_CreateFn());
+		}
+	}
+
+	return nullptr;
+}