roa-mod-loader

basic loader for mods made for Rivals of Aether. provides a logger and wrapper functions for MinHook (https://github.com/TsudaKageyu/minhook)

• Works through versions 1.4.0 - 2.1.9.1, for older version you will have to manually start the loader using Cheat Engine, as they do not use a catch_error_mini.dll

hooking a built-in function example

// game_save function ptr
// will be set to the address of the built-in function game_save() if it is found
GMLScriptPtr game_save;

// our detour function that logs whenever game_save is called
void game_save_detour(GMLInstance* self, GMLInstance* other, RValue& out, uint32_t arg_count, RValue* args)
{
    loader_log_info("game_save called");
    game_save(self, other, out, arg_count, args);
}

DWORD WINAPI entry(LPVOID hModule)
{
    // get the function pointer of built-in function game_save()
    void* hook_ptr = loader_get_yyc_func_ptr("game_save");
    
    loader_hook_create(hook_ptr, &game_save_detour, game_save);
    loader_hook_enable(hook_ptr);
}