From eddb0ba43ea75705d2ced3601da019ca2f802a42 Mon Sep 17 00:00:00 2001
From: JaceCear <11230293+JaceCear@users.noreply.github.com>
Date: Tue, 10 Dec 2024 14:10:18 +0100
Subject: [PATCH] Split GAME_ and ENGINE_ macros

---
 include/config.h    | 18 ++++++++++++++----
 include/game/game.h |  6 ------
 include/sprite.h    |  2 +-
 src/core.c          |  6 ++++--
 src/multi_sio.c     |  2 +-
 5 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/include/config.h b/include/config.h
index afadc0557..ee95e6bad 100644
--- a/include/config.h
+++ b/include/config.h
@@ -3,13 +3,23 @@
 
 /* TODO: Move config.h into a different location? */
 
-#define GAME_SA1 1
-#define GAME_SA2 2
-#define GAME_SA3 3
+#define GAME_SA1   1
+#define GAME_SA2   2
+#define GAME_SA3   3
+#define GAME_KATAM 4
 
-// TODO: Define this in Makefile through a compiler macro!
+#define ENGINE_1 1
+#define ENGINE_2 2
+#define ENGINE_3 3
+#define ENGINE_4 4
+
+// TODO: Define this in Makefile through a compiler macro?
 #define GAME GAME_SA2
 
+// TODO: Do SA1 and SA2 use the same engine ver?
+// TODO: Do SA3 and KATAM use the same engine ver?
+#define ENGINE GAME
+
 // TODO: Put somewhere else?
 #if PLATFORM_GBA
 #define USE_NEW_DMA 0
diff --git a/include/game/game.h b/include/game/game.h
index c3621603a..7cc1af7f5 100644
--- a/include/game/game.h
+++ b/include/game/game.h
@@ -5,10 +5,4 @@
 
 void GameStart(void);
 
-#define GAME_SA1     1
-#define GAME_SA2     2
-#define GAME_SA3     3
-#define GAME_KATAM   4
-#define CURRENT_GAME GAME_SA2
-
 #endif // GUARD_GAME_H
diff --git a/include/sprite.h b/include/sprite.h
index 2961d6938..207e98ba3 100644
--- a/include/sprite.h
+++ b/include/sprite.h
@@ -93,7 +93,7 @@ typedef struct {
 } Background; /* size = 0x40 */
 
 typedef struct {
-#if (CURRENT_GAME >= GAME_SA3)
+#if (ENGINE >= ENGINE_3)
     // In SA3 flip-bits are integrated into the oamIndex.
     // X-Flip: Bit 14
     // Y-Flip: Bit 15
diff --git a/src/core.c b/src/core.c
index 92e3d439f..cda33891e 100644
--- a/src/core.c
+++ b/src/core.c
@@ -35,6 +35,8 @@ u8 gNumHBlankIntrs = 0;
 struct BlendRegs gBldRegs ALIGNED(8) = {};
 u8 gOamFreeIndex = 0;
 struct Task gEmptyTask ALIGNED(16) = {};
+
+// NOTE: gNextFreeAffineIndex introduced in SA3, unused before.
 u8 gNextFreeAffineIndex = 0;
 BgAffineReg gBgAffineRegs[NUM_AFFINE_BACKGROUNDS] = {};
 void *gVramHeapStartAddr = NULL;
@@ -251,7 +253,7 @@ void GameInit(void)
     gBgAffineRegs[1].x = 0;
     gBgAffineRegs[1].y = 0;
 
-#if (CURRENT_GAME >= GAME_SA3)
+#if (GAME >= GAME_SA3)
     gNextFreeAffineIndex = 0;
 #endif
     gUnknown_03001944 = 0;
@@ -381,7 +383,7 @@ void GameLoop(void)
         gFlagsPreVBlank = gFlags;
         VBlankIntrWait();
 
-#if (CURRENT_GAME >= GAME_SA3)
+#if (GAME >= GAME_SA3)
         gNextFreeAffineIndex = 0;
 #endif
 
diff --git a/src/multi_sio.c b/src/multi_sio.c
index 6e72757b0..ceb29fdd8 100644
--- a/src/multi_sio.c
+++ b/src/multi_sio.c
@@ -11,7 +11,7 @@ u32 gMultiSioIntrFuncBuf[0x120 / 4] = {}; // Interrupt Routine RAM Execution Buf
 
 struct MultiSioArea gMultiSioArea = {};
 
-#if (CURRENT_GAME <= GAME_SA2)
+#if (GAME <= GAME_SA2)
 UNUSED u32 gUnusedMultiSioSpace[2] = {};
 #endif