Adds minimal Steam fiddling protection

CMakeLists.txt

@@ -7,7 +7,7 @@ project(breakhack C)
 set(breakhack_GAME_TITLE "BreakHack")
 set(breakhack_MAJOR_VERSION 1)
 set(breakhack_MINOR_VERSION 1)
-set(breakhack_PATCH_VERSION 3)
+set(breakhack_PATCH_VERSION 4)
 set(breakhack_RELEASE_TYPE "")
 
 include(FindLua)

src/main.c

@@ -526,16 +526,21 @@ resetGame(void)
 static bool
 init(void)
 {
+#ifdef STEAM_BUILD
+	if (!steam_restart_needed()) {
+		steam_init();
+	} else {
+		error("%s needs to be started through Steam", GAME_TITLE);
+		return false;
+	}
+#endif // STEAM_BUILD
+
 	if (!initSDL()) {
 		return false;
 	} else if (!initGame()) {
 		return false;
 	}
 
-#ifdef STEAM_BUILD
-	steam_init();
-#endif // STEAM_BUILD
-
 	settings_init();
 	hiscore_init();
 	initMainMenu();

src/steam/steamworks_api_wrapper.c

@@ -58,6 +58,12 @@ leaderboard_received(Sint64 hLeaderboard, const char *name)
 		m_hKillsLeaderboard = hLeaderboard;
 }
 
+bool
+steam_restart_needed()
+{
+	return c_SteamAPI_RestartAppIfNecessary();
+}
+
 void
 steam_init()
 {

src/steam/steamworks_api_wrapper.h

@@ -25,6 +25,8 @@ typedef struct Achievement {
 	int m_iIconImage;
 } Achievement;
 
+bool steam_restart_needed(void);
+
 void steam_init(void);
 
 void steam_shutdown(void);

steamworks_c_wrapper/src/steamworks_c_wrapper.cpp

@@ -47,6 +47,11 @@ c_SteamAPI_GetAppID()
 	return m_AppId;
 }
 
+bool c_SteamAPI_RestartAppIfNecessary()
+{
+	return SteamAPI_RestartAppIfNecessary(931040);
+}
+
 void
 c_SteamAPI_RunCallbacks(void)
 {

steamworks_c_wrapper/src/steamworks_c_wrapper.h

@@ -26,6 +26,9 @@ c_SteamAPI_Init(void);
 int64_t
 c_SteamAPI_GetAppID(void);
 
+bool
+c_SteamAPI_RestartAppIfNecessary(void);
+
 void
 c_SteamAPI_RunCallbacks(void);