DLLModHelpers.h

// Based heavily on Skyth's Helpers.h: https://github.com/blueskythlikesclouds/DllMods/blob/master/Dependencies/Helpers.h
#pragma once
#include "detours.h"
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <cstddef>

inline static const HMODULE MODULE_HANDLE = GetModuleHandle(nullptr);

#ifdef BASE_ADDRESS
#define ASLR(address) (reinterpret_cast<std::size_t>(MODULE_HANDLE) + \
    static_cast<std::size_t>(address) - static_cast<std::size_t>(BASE_ADDRESS))
#else
#define ASLR(address) (reinterpret_cast<std::size_t>(MODULE_HANDLE) + \
    static_cast<std::size_t>(address))
#endif

#define ININSTALL_HOOK(orig, hook) \
    { \
        DetourTransactionBegin(); \
        DetourUpdateThread(GetCurrentThread()); \
        DetourAttach((void**)&orig, hook); \
        DetourTransactionCommit(); \
    }

#define INSTALL_HOOK(name) ININSTALL_HOOK(name##_original, name##_hook)
#define INSTALL_HOOK_MEMBER(className, name) \
    ININSTALL_HOOK(className::name##_original, className##_##name##_hook)

#define FUNC_PTR(address, callingConvention, returnType, name, ...)\
    typedef returnType (callingConvention*name##_ptr_t)(__VA_ARGS__);\
    inline static const name##_ptr_t name = reinterpret_cast<name##_ptr_t>(address);\
    inline static name##_ptr_t name##_original = reinterpret_cast<name##_ptr_t>(address)

#define MEMBER_FUNC(address, className, returnType, name, ...)\
    typedef returnType (__thiscall*name##_ptr_t)(className* thisPtr, __VA_ARGS__);\
    inline static const name##_ptr_t name##_ptr = (name##_ptr_t)(address);\
    inline static name##_ptr_t name##_original = reinterpret_cast<name##_ptr_t>(address)

#define CALL_ORIGINAL(name, ...) name##_original(__VA_ARGS__)
#define HOOK(callingConvention, returnType, name, ...)\
    returnType callingConvention name##_hook(__VA_ARGS__)

#if defined(x64) || defined(_AMD64_)
#define HOOK_MEMBER(className, returnType, name, ...)\
    returnType __fastcall className##_##name##_hook(className* thisPtr,\
        __VA_ARGS__)
#else
#define HOOK_MEMBER(className, returnType, name, ...)\
    returnType __fastcall className##_##name##_hook(className* thisPtr,\
        void* DUMMY_ARGUMENT, __VA_ARGS__)
#endif