NoMovement1, GoRandomDirections

asm/field_map_obj.s

@@ -5,66 +5,6 @@
 
 	.text
 
-	thumb_func_start FieldObjectCB_NoMovement1
-FieldObjectCB_NoMovement1: @ 808F3E0
-	push {lr}
-	adds r1, r0, 0
-	movs r0, 0x2E
-	ldrsh r2, [r1, r0]
-	lsls r0, r2, 3
-	adds r0, r2
-	lsls r0, 2
-	ldr r2, =gMapObjects
-	adds r0, r2
-	ldr r2, =FieldObjectCB2_NoMovement1
-	bl FieldObjectStep
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end FieldObjectCB_NoMovement1
-
-	thumb_func_start FieldObjectCB2_NoMovement1
-FieldObjectCB2_NoMovement1: @ 808F404
-	movs r0, 0
-	bx lr
-	thumb_func_end FieldObjectCB2_NoMovement1
-
-	thumb_func_start FieldObjectCB_GoRandomDirections
-FieldObjectCB_GoRandomDirections: @ 808F408
-	push {lr}
-	adds r1, r0, 0
-	movs r0, 0x2E
-	ldrsh r2, [r1, r0]
-	lsls r0, r2, 3
-	adds r0, r2
-	lsls r0, 2
-	ldr r2, =gMapObjects
-	adds r0, r2
-	ldr r2, =FieldObjectCB2_GoRandomDirections
-	bl FieldObjectStep
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end FieldObjectCB_GoRandomDirections
-
-	thumb_func_start FieldObjectCB2_GoRandomDirections
-FieldObjectCB2_GoRandomDirections: @ 808F42C
-	push {r4,lr}
-	ldr r3, =gUnknown_0850D6F4
-	movs r4, 0x30
-	ldrsh r2, [r1, r4]
-	lsls r2, 2
-	adds r2, r3
-	ldr r2, [r2]
-	bl _call_via_r2
-	lsls r0, 24
-	lsrs r0, 24
-	pop {r4}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end FieldObjectCB2_GoRandomDirections
-
 	thumb_func_start sub_808F44C
 sub_808F44C: @ 808F44C
 	push {r4,lr}

include/field_map_obj.h

@@ -47,6 +47,7 @@ void FieldObjectGetLocalIdAndMap(struct MapObject *, u8 *, u8 *, u8 *);
 void npc_coords_shift(struct MapObject *, s16, s16);
 void sub_808EB08(struct MapObject *, s16, s16);
 void sub_808F254(u8, u8, u8);
+void FieldObjectStep(struct MapObject *, struct Sprite *, bool8(struct MapObject *, struct Sprite *));
 
 // Exported data declarations
 

src/field_map_obj.c

@@ -20,6 +20,29 @@
 
 #define NUM_FIELD_MAP_OBJECT_TEMPLATES 0x51
 
+#define null_object_step(name, retval) \
+static bool8 FieldObjectCB2_##name(struct MapObject *, struct Sprite *);\
+void FieldObjectCB_##name(struct Sprite *sprite)\
+{\
+    FieldObjectStep(&gMapObjects[sprite->data0], sprite, FieldObjectCB2_##name);\
+}\
+static bool8 FieldObjectCB2_##name(struct MapObject *mapObject, struct Sprite *sprite)\
+{\
+    return (retval);\
+}
+
+#define field_object_step(name, table) \
+extern bool8 (*const (table)[])(struct MapObject *, struct Sprite *);\
+static bool8 FieldObjectCB2_##name(struct MapObject *, struct Sprite *);\
+void FieldObjectCB_##name(struct Sprite *sprite)\
+{\
+    FieldObjectStep(&gMapObjects[sprite->data0], sprite, FieldObjectCB2_##name);\
+}\
+static bool8 FieldObjectCB2_##name(struct MapObject *mapObject, struct Sprite *sprite)\
+{\
+    return (table)[sprite->data1](mapObject, sprite);\
+}
+
 // Static struct declarations
 
 // Static RAM declarations
@@ -1692,3 +1715,8 @@ u16 npc_paltag_by_palslot(u8 palSlot)
     }
     return 0x11ff;
 }
+
+null_object_step(NoMovement1, FALSE)
+
+field_object_step(GoRandomDirections, gUnknown_0850D6F4)
+