sub_812CAD8

New macro `PRESSED(x)` tests `gMain.newKeys & (x)`.  The macro itself
is inoptimal.  However, its use is required to match this function.
We suspect this macro may have been implemented globally, hence we
put it in `global.h`.  Propagating its use through the remainder of
this project, as well as [Ruby](/pret/pokeruby) and [Emerald](/pret/pokeemerald),
has been left as a to-do item.

3 files changed, 84 insertions, 198 deletions

diff --git a/asm/fame_checker.s b/asm/fame_checker.s
index f87b8622f..80c8fa2a8 100644
--- a/asm/fame_checker.s
+++ b/asm/fame_checker.s
@@ -5,200 +5,6 @@
 
 	.text
 
-	thumb_func_start sub_812CAD8
-sub_812CAD8: @ 812CAD8
-	push {r4-r6,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	lsls r1, r4, 2
-	adds r1, r4
-	lsls r1, 3
-	ldr r0, _0812CB9C @ =gTasks
-	adds r5, r1, r0
-	adds r0, 0x8
-	adds r6, r1, r0
-	bl RunTextPrinters
-	ldr r0, _0812CBA0 @ =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x1
-	ands r0, r1
-	cmp r0, 0
-	beq _0812CB2E
-	movs r0, 0x2
-	bl IsTextPrinterActive
-	lsls r0, 16
-	cmp r0, 0
-	bne _0812CB2E
-	ldr r0, _0812CBA4 @ =gUnknown_203B0FC
-	ldr r0, [r0]
-	movs r2, 0x2
-	ldrsh r1, [r6, r2]
-	adds r0, 0x1D
-	adds r0, r1
-	ldrb r1, [r0]
-	ldr r2, _0812CBA8 @ =gSprites
-	lsls r0, r1, 4
-	adds r0, r1
-	lsls r0, 2
-	adds r0, r2
-	movs r1, 0x30
-	ldrsh r0, [r0, r1]
-	cmp r0, 0xFF
-	beq _0812CB2E
-	adds r0, r4, 0
-	bl sub_812CE04
-_0812CB2E:
-	ldr r0, _0812CBA0 @ =gMain
-	ldrh r1, [r0, 0x2E]
-	movs r0, 0x2
-	ands r0, r1
-	cmp r0, 0
-	beq _0812CBB8
-	movs r0, 0x5
-	bl PlaySE
-	movs r4, 0
-	ldr r6, _0812CBA4 @ =gUnknown_203B0FC
-_0812CB44:
-	ldr r0, [r6]
-	adds r0, 0x1D
-	adds r0, r4
-	ldrb r0, [r0]
-	movs r1, 0
-	bl sub_812CEFC
-	adds r0, r4, 0x1
-	lsls r0, 24
-	lsrs r4, r0, 24
-	cmp r4, 0x5
-	bls _0812CB44
-	bl sub_812CE9C
-	ldr r2, _0812CBA8 @ =gSprites
-	movs r0, 0x8
-	ldrsh r1, [r5, r0]
-	lsls r0, r1, 4
-	adds r0, r1
-	lsls r0, 2
-	adds r2, 0x1C
-	adds r0, r2
-	ldr r1, _0812CBAC @ =sub_812D764
-	str r1, [r0]
-	ldr r0, _0812CBB0 @ =gUnknown_3005EC8
-	ldrb r0, [r0]
-	cmp r0, 0xFF
-	beq _0812CB80
-	bl sub_812DB10
-_0812CB80:
-	movs r0, 0x1
-	bl sub_812E4A4
-	movs r0, 0
-	bl sub_812D0F4
-	bl sub_812E000
-	bl sub_812C990
-	ldr r0, _0812CBB4 @ =sub_812C694
-	str r0, [r5]
-	b _0812CC62
-	.align 2, 0
-_0812CB9C: .4byte gTasks
-_0812CBA0: .4byte gMain
-_0812CBA4: .4byte gUnknown_203B0FC
-_0812CBA8: .4byte gSprites
-_0812CBAC: .4byte sub_812D764
-_0812CBB0: .4byte gUnknown_3005EC8
-_0812CBB4: .4byte sub_812C694
-_0812CBB8:
-	movs r0, 0x40
-	ands r0, r1
-	cmp r0, 0
-	bne _0812CBC8
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	beq _0812CBF4
-_0812CBC8:
-	ldrh r1, [r5, 0xA]
-	movs r2, 0xA
-	ldrsh r0, [r5, r2]
-	cmp r0, 0x2
-	ble _0812CBE4
-	subs r0, r1, 0x3
-	strh r0, [r5, 0xA]
-	movs r2, 0x1B
-	negs r2, r2
-	adds r0, r4, 0
-	movs r1, 0
-	bl sub_812CC68
-	b _0812CC62
-_0812CBE4:
-	adds r0, r1, 0x3
-	strh r0, [r5, 0xA]
-	adds r0, r4, 0
-	movs r1, 0
-	movs r2, 0x1B
-	bl sub_812CC68
-	b _0812CC62
-_0812CBF4:
-	movs r0, 0x20
-	ands r0, r1
-	cmp r0, 0
-	beq _0812CC26
-	ldrh r6, [r5, 0xA]
-	movs r1, 0xA
-	ldrsh r0, [r5, r1]
-	cmp r0, 0
-	beq _0812CC12
-	movs r1, 0x3
-	bl __modsi3
-	lsls r0, 16
-	cmp r0, 0
-	bne _0812CC1C
-_0812CC12:
-	adds r0, r6, 0x2
-	strh r0, [r5, 0xA]
-	adds r0, r4, 0
-	movs r1, 0x5E
-	b _0812CC4A
-_0812CC1C:
-	subs r0, r6, 0x1
-	strh r0, [r5, 0xA]
-	movs r1, 0x2F
-	negs r1, r1
-	b _0812CC48
-_0812CC26:
-	movs r0, 0x10
-	ands r0, r1
-	cmp r0, 0
-	beq _0812CC62
-	movs r1, 0xA
-	ldrsh r0, [r5, r1]
-	adds r0, 0x1
-	movs r1, 0x3
-	bl __modsi3
-	cmp r0, 0
-	bne _0812CC52
-	ldrh r0, [r5, 0xA]
-	subs r0, 0x2
-	strh r0, [r5, 0xA]
-	movs r1, 0x5E
-	negs r1, r1
-_0812CC48:
-	adds r0, r4, 0
-_0812CC4A:
-	movs r2, 0
-	bl sub_812CC68
-	b _0812CC62
-_0812CC52:
-	ldrh r0, [r5, 0xA]
-	adds r0, 0x1
-	strh r0, [r5, 0xA]
-	adds r0, r4, 0
-	movs r1, 0x2F
-	movs r2, 0
-	bl sub_812CC68
-_0812CC62:
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_812CAD8
-
 	thumb_func_start sub_812CC68
 sub_812CC68: @ 812CC68
 	push {r4-r7,lr}
diff --git a/include/global.h b/include/global.h
index 050e200f9..3dc11bfbd 100644
--- a/include/global.h
+++ b/include/global.h
@@ -62,6 +62,13 @@
 #define T2_READ_32(ptr) ((ptr)[0] + ((ptr)[1] << 8) + ((ptr)[2] << 16) + ((ptr)[3] << 24))
 #define T2_READ_PTR(ptr) (void*) T2_READ_32(ptr)
 
+// This macro is required to prevent the compiler from optimizing
+// a dpad up/down check in sub_812CAD8 (fame_checker.c).
+// We suspect it was used globally.
+// GameFreak never ceases to amaze.
+// TODO: Propagate use of this macro
+#define PRESSED(button) ({gMain.newKeys & (button);})
+
 extern u8 gStringVar1[];
 extern u8 gStringVar2[];
 extern u8 gStringVar3[];
diff --git a/src/fame_checker.c b/src/fame_checker.c
index 81aeb7aee..e83eaa301 100644
--- a/src/fame_checker.c
+++ b/src/fame_checker.c
@@ -1,5 +1,6 @@
 #include "global.h"
 #include "constants/songs.h"
+#include "sprite.h"
 #include "bg.h"
 #include "graphics.h"
 #include "new_menu_helpers.h"
@@ -58,6 +59,7 @@ void sub_812C990(void);
 void sub_812C9BC(u8 taskId);
 void sub_812CA1C(u8 taskId);
 void sub_812CAD8(u8 taskId);
+void sub_812CC68(u8 taskId, s8 dx, s8 dy);
 void sub_812CD3C(void);
 void sub_812CE04(u8 taskId);
 void sub_812CE9C(void);
@@ -73,11 +75,13 @@ void sub_812D584(void);
 void sub_812D594(void);
 bool8 sub_812D6B4(void);
 u8 sub_812D724(s16 a0);
+void sub_812D764(struct Sprite *sprite);
 u8 sub_812D7E4(void);
 void sub_812D800(struct Sprite *sprite);
 u8 sub_812D888(u8 a0);
 void sub_812D9A8(u8 a0, u16 a1);
 void sub_812DA14(u8 a0);
+void sub_812DB10(void);
 void sub_812DB28(void);
 void sub_812E000(void);
 void sub_812E048(void);
@@ -222,9 +226,9 @@ void sub_812C694(u8 taskId)
     if (FindTaskIdByFunc(sub_812E110) == 0xFF)
     {
         RunTextPrinters();
-        if ((gMain.newKeys & SELECT_BUTTON) && !gUnknown_203B0FC->unk_07_1 && gUnknown_203B0FC->unk_00 != sub_8107EB8)
+        if ((PRESSED(SELECT_BUTTON)) && !gUnknown_203B0FC->unk_07_1 && gUnknown_203B0FC->unk_00 != sub_8107EB8)
             task->func = sub_812CF3C;
-        else if (gMain.newKeys & START_BUTTON)
+        else if (PRESSED(START_BUTTON))
         {
             r4 = sub_812E064();
             if (sub_812C8F8(taskId) == TRUE)
@@ -248,7 +252,7 @@ void sub_812C694(u8 taskId)
                 task->func = sub_812C9BC;
             }
         }
-        else if (gMain.newKeys & A_BUTTON)
+        else if (PRESSED(A_BUTTON))
         {
             r4 = ListMenuHandleInput(0);
             if (r4 == gUnknown_203B0FC->unk_07_2 - 1)
@@ -279,7 +283,7 @@ void sub_812C694(u8 taskId)
                 task->func = sub_812CAD8;
             }
         }
-        else if (gMain.newKeys & B_BUTTON)
+        else if (PRESSED(B_BUTTON))
         {
             if (sub_812C8F8(taskId) != TRUE)
                 task->func = sub_812CF3C;
@@ -344,3 +348,72 @@ void sub_812CA1C(u8 taskId)
         gSprites[task->data[3]].callback = sub_812D800;
     }
 }
+
+void sub_812CAD8(u8 taskId)
+{
+    struct Task *task = &gTasks[taskId];
+    s16 *data = gTasks[taskId].data;
+
+    RunTextPrinters();
+    if (PRESSED(A_BUTTON) && !IsTextPrinterActive(2))
+    {
+        u8 spriteId = gUnknown_203B0FC->unk_1D[data[1]];
+        if (gSprites[spriteId].data[1] != 0xFF)
+            sub_812CE04(taskId);
+    }
+    if (PRESSED(B_BUTTON))
+    {
+        u8 r4;
+        PlaySE(SE_SELECT);
+        for (r4 = 0; r4 < 6; r4++)
+            sub_812CEFC(gUnknown_203B0FC->unk_1D[r4], 0);
+        sub_812CE9C();
+        gSprites[task->data[0]].callback = sub_812D764;
+        if (gUnknown_3005EC8 != 0xFF)
+            sub_812DB10();
+        sub_812E4A4(1);
+        sub_812D0F4(0);
+        sub_812E000();
+        sub_812C990();
+        task->func = sub_812C694;
+    }
+    else if (PRESSED(DPAD_UP) || PRESSED(DPAD_DOWN))
+    {
+        if (task->data[1] >= 3)
+        {
+            task->data[1] -= 3;
+            sub_812CC68(taskId, 0, -0x1b);
+        }
+        else
+        {
+            task->data[1] += 3;
+            sub_812CC68(taskId, 0, +0x1b);
+        }
+    }
+    else if (PRESSED(DPAD_LEFT))
+    {
+        if (task->data[1] == 0 || task->data[1] % 3 == 0)
+        {
+            task->data[1] += 2;
+            sub_812CC68(taskId, +0x5e, 0);
+        }
+        else
+        {
+            task->data[1]--;
+            sub_812CC68(taskId, -0x2f, 0);
+        }
+    }
+    else if (PRESSED(DPAD_RIGHT))
+    {
+        if ((task->data[1] + 1) % 3 == 0)
+        {
+            task->data[1] -= 2;
+            sub_812CC68(taskId, -0x5e, 0);
+        }
+        else
+        {
+            task->data[1]++;
+            sub_812CC68(taskId, +0x2f, 0);
+        }
+    }
+}