start decompiling shop.c (#234)

3 files changed, 200 insertions, 434 deletions

diff --git a/asm/shop.s b/asm/shop.s
index d59f9584e..b23b07003 100644
--- a/asm/shop.s
+++ b/asm/shop.s
@@ -6,440 +6,6 @@
 
 	.text
 
-	thumb_func_start CreateShopMenu
-CreateShopMenu: @ 80B2D54
-	push {r4,lr}
-	sub sp, 0x8
-	adds r4, r0, 0
-	lsls r4, 24
-	lsrs r4, 24
-	bl ScriptContext2_Enable
-	ldr r1, _080B2D90 @ =gUnknown_03000708
-	movs r0, 0
-	strb r4, [r1, 0xC]
-	strb r0, [r1, 0x9]
-	cmp r4, 0
-	bne _080B2D9C
-	movs r0, 0x2
-	strb r0, [r1, 0xA]
-	movs r0, 0
-	movs r1, 0
-	movs r2, 0xA
-	movs r3, 0x7
-	bl MenuDrawTextWindow
-	ldr r3, _080B2D94 @ =gUnknown_083CC6D0
-	ldr r0, _080B2D98 @ =gUnknown_083CC6E8
-	str r0, [sp]
-	movs r0, 0x1
-	movs r1, 0x1
-	movs r2, 0x3
-	bl PrintMenuItemsReordered
-	b _080B2DBC
-	.align 2, 0
-_080B2D90: .4byte gUnknown_03000708
-_080B2D94: .4byte gUnknown_083CC6D0
-_080B2D98: .4byte gUnknown_083CC6E8
-_080B2D9C:
-	movs r0, 0x1
-	strb r0, [r1, 0xA]
-	movs r0, 0
-	movs r1, 0
-	movs r2, 0xA
-	movs r3, 0x5
-	bl MenuDrawTextWindow
-	ldr r3, _080B2DEC @ =gUnknown_083CC6D0
-	ldr r0, _080B2DF0 @ =gUnknown_083CC6EB
-	str r0, [sp]
-	movs r0, 0x1
-	movs r1, 0x1
-	movs r2, 0x2
-	bl PrintMenuItemsReordered
-_080B2DBC:
-	ldr r0, _080B2DF4 @ =gUnknown_03000708
-	ldrb r3, [r0, 0xA]
-	adds r3, 0x1
-	lsls r3, 24
-	lsrs r3, 24
-	movs r0, 0
-	str r0, [sp]
-	movs r0, 0x9
-	str r0, [sp, 0x4]
-	movs r0, 0
-	movs r1, 0x1
-	movs r2, 0x1
-	bl InitMenu
-	ldr r0, _080B2DF8 @ =sub_80B2E38
-	movs r1, 0x8
-	bl CreateTask
-	lsls r0, 24
-	lsrs r0, 24
-	add sp, 0x8
-	pop {r4}
-	pop {r1}
-	bx r1
-	.align 2, 0
-_080B2DEC: .4byte gUnknown_083CC6D0
-_080B2DF0: .4byte gUnknown_083CC6EB
-_080B2DF4: .4byte gUnknown_03000708
-_080B2DF8: .4byte sub_80B2E38
-	thumb_func_end CreateShopMenu
-
-	thumb_func_start SetShopMenuCallback
-SetShopMenuCallback: @ 80B2DFC
-	ldr r1, _080B2E04 @ =gUnknown_03000708
-	str r0, [r1]
-	bx lr
-	.align 2, 0
-_080B2E04: .4byte gUnknown_03000708
-	thumb_func_end SetShopMenuCallback
-
-	thumb_func_start SetShopItemsForSale
-SetShopItemsForSale: @ 80B2E08
-	push {lr}
-	adds r1, r0, 0
-	movs r2, 0
-	ldr r3, _080B2E34 @ =gUnknown_03000708
-	str r1, [r3, 0x4]
-	strb r2, [r3, 0x8]
-	ldrh r0, [r1]
-	cmp r0, 0
-	beq _080B2E30
-_080B2E1A:
-	ldrb r0, [r3, 0x8]
-	adds r0, 0x1
-	strb r0, [r3, 0x8]
-	adds r0, r2, 0x1
-	lsls r0, 16
-	lsrs r2, r0, 16
-	lsls r0, r2, 1
-	adds r0, r1
-	ldrh r0, [r0]
-	cmp r0, 0
-	bne _080B2E1A
-_080B2E30:
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080B2E34: .4byte gUnknown_03000708
-	thumb_func_end SetShopItemsForSale
-
-	thumb_func_start sub_80B2E38
-sub_80B2E38: @ 80B2E38
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	ldr r2, _080B2E60 @ =gMain
-	ldrh r1, [r2, 0x30]
-	movs r0, 0x40
-	ands r0, r1
-	cmp r0, 0
-	beq _080B2E68
-	ldr r4, _080B2E64 @ =gUnknown_03000708
-	ldrb r0, [r4, 0x9]
-	cmp r0, 0
-	beq _080B2EF4
-	movs r0, 0x5
-	bl PlaySE
-	movs r0, 0x1
-	negs r0, r0
-	b _080B2E82
-	.align 2, 0
-_080B2E60: .4byte gMain
-_080B2E64: .4byte gUnknown_03000708
-_080B2E68:
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	beq _080B2E90
-	ldr r4, _080B2E8C @ =gUnknown_03000708
-	ldrb r0, [r4, 0x9]
-	ldrb r1, [r4, 0xA]
-	cmp r0, r1
-	beq _080B2EF4
-	movs r0, 0x5
-	bl PlaySE
-	movs r0, 0x1
-_080B2E82:
-	bl MoveMenuCursor
-	strb r0, [r4, 0x9]
-	b _080B2EF4
-	.align 2, 0
-_080B2E8C: .4byte gUnknown_03000708
-_080B2E90:
-	ldrh r1, [r2, 0x2E]
-	movs r0, 0x1
-	ands r0, r1
-	cmp r0, 0
-	beq _080B2EE0
-	movs r0, 0x5
-	bl PlaySE
-	ldr r3, _080B2EB0 @ =gUnknown_03000708
-	ldrb r0, [r3, 0xC]
-	cmp r0, 0
-	bne _080B2EBC
-	ldr r1, _080B2EB4 @ =gUnknown_083CC6D0
-	ldr r2, _080B2EB8 @ =gUnknown_083CC6E8
-	b _080B2EC0
-	.align 2, 0
-_080B2EB0: .4byte gUnknown_03000708
-_080B2EB4: .4byte gUnknown_083CC6D0
-_080B2EB8: .4byte gUnknown_083CC6E8
-_080B2EBC:
-	ldr r1, _080B2ED8 @ =gUnknown_083CC6D0
-	ldr r2, _080B2EDC @ =gUnknown_083CC6EB
-_080B2EC0:
-	ldrb r0, [r3, 0x9]
-	adds r0, r2
-	ldrb r0, [r0]
-	lsls r0, 3
-	adds r1, 0x4
-	adds r0, r1
-	ldr r1, [r0]
-	adds r0, r4, 0
-	bl _call_via_r1
-	b _080B2EF4
-	.align 2, 0
-_080B2ED8: .4byte gUnknown_083CC6D0
-_080B2EDC: .4byte gUnknown_083CC6EB
-_080B2EE0:
-	movs r0, 0x2
-	ands r0, r1
-	cmp r0, 0
-	beq _080B2EF4
-	movs r0, 0x5
-	bl PlaySE
-	adds r0, r4, 0
-	bl HandleShopMenuQuit
-_080B2EF4:
-	pop {r4}
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80B2E38
-
-	thumb_func_start sub_80B2EFC
-sub_80B2EFC: @ 80B2EFC
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r2, _080B2F24 @ =gTasks
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	adds r1, r2
-	ldr r2, _080B2F28 @ =BuyMenuDrawGraphics
-	lsrs r0, r2, 16
-	strh r0, [r1, 0x18]
-	strh r2, [r1, 0x1A]
-	ldr r0, _080B2F2C @ =sub_80B2FA0
-	str r0, [r1]
-	movs r0, 0x1
-	movs r1, 0
-	bl fade_screen
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080B2F24: .4byte gTasks
-_080B2F28: .4byte BuyMenuDrawGraphics
-_080B2F2C: .4byte sub_80B2FA0
-	thumb_func_end sub_80B2EFC
-
-	thumb_func_start sub_80B2F30
-sub_80B2F30: @ 80B2F30
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r2, _080B2F58 @ =gTasks
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	adds r1, r2
-	ldr r2, _080B2F5C @ =sub_80A6300
-	lsrs r0, r2, 16
-	strh r0, [r1, 0x18]
-	strh r2, [r1, 0x1A]
-	ldr r0, _080B2F60 @ =sub_80B2FA0
-	str r0, [r1]
-	movs r0, 0x1
-	movs r1, 0
-	bl fade_screen
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080B2F58: .4byte gTasks
-_080B2F5C: .4byte sub_80A6300
-_080B2F60: .4byte sub_80B2FA0
-	thumb_func_end sub_80B2F30
-
-	thumb_func_start HandleShopMenuQuit
-HandleShopMenuQuit: @ 80B2F64
-	push {r4,lr}
-	adds r4, r0, 0
-	lsls r4, 24
-	lsrs r4, 24
-	bl sub_8072DEC
-	movs r0, 0
-	movs r1, 0
-	movs r2, 0xB
-	movs r3, 0x8
-	bl MenuZeroFillWindowRect
-	bl sub_80BE3BC
-	bl ScriptContext2_Disable
-	adds r0, r4, 0
-	bl DestroyTask
-	ldr r0, _080B2F9C @ =gUnknown_03000708
-	ldr r0, [r0]
-	cmp r0, 0
-	beq _080B2F96
-	bl _call_via_r0
-_080B2F96:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080B2F9C: .4byte gUnknown_03000708
-	thumb_func_end HandleShopMenuQuit
-
-	thumb_func_start sub_80B2FA0
-sub_80B2FA0: @ 80B2FA0
-	push {r4,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	ldr r0, _080B2FD4 @ =gPaletteFade
-	ldrb r1, [r0, 0x7]
-	movs r0, 0x80
-	ands r0, r1
-	cmp r0, 0
-	bne _080B2FCE
-	ldr r0, _080B2FD8 @ =gTasks
-	lsls r1, r4, 2
-	adds r1, r4
-	lsls r1, 3
-	adds r1, r0
-	ldrh r0, [r1, 0x18]
-	lsls r0, 16
-	ldrh r1, [r1, 0x1A]
-	orrs r0, r1
-	bl SetMainCallback2
-	adds r0, r4, 0
-	bl DestroyTask
-_080B2FCE:
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080B2FD4: .4byte gPaletteFade
-_080B2FD8: .4byte gTasks
-	thumb_func_end sub_80B2FA0
-
-	thumb_func_start ReturnToShopMenuAfterExitingSellMenu
-ReturnToShopMenuAfterExitingSellMenu: @ 80B2FDC
-	push {r4,lr}
-	adds r4, r0, 0
-	lsls r4, 24
-	lsrs r4, 24
-	ldr r0, _080B2FF8 @ =gUnknown_03000708
-	ldrb r0, [r0, 0xC]
-	bl CreateShopMenu
-	adds r0, r4, 0
-	bl DestroyTask
-	pop {r4}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080B2FF8: .4byte gUnknown_03000708
-	thumb_func_end ReturnToShopMenuAfterExitingSellMenu
-
-	thumb_func_start Task_ExitSellMenu
-Task_ExitSellMenu: @ 80B2FFC
-	push {r4,r5,lr}
-	lsls r0, 24
-	lsrs r4, r0, 24
-	adds r5, r4, 0
-	bl sub_807D770
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x1
-	bne _080B3040
-	ldr r0, _080B3028 @ =gUnknown_03000708
-	ldrb r0, [r0, 0xC]
-	cmp r0, 0x2
-	bne _080B3034
-	ldr r1, _080B302C @ =gOtherText_CanIHelpYou
-	ldr r2, _080B3030 @ =ReturnToShopMenuAfterExitingSellMenu
-	adds r0, r4, 0
-	movs r3, 0
-	bl DisplayItemMessageOnField
-	b _080B3040
-	.align 2, 0
-_080B3028: .4byte gUnknown_03000708
-_080B302C: .4byte gOtherText_CanIHelpYou
-_080B3030: .4byte ReturnToShopMenuAfterExitingSellMenu
-_080B3034:
-	ldr r1, _080B3048 @ =gOtherText_AnythingElse
-	ldr r2, _080B304C @ =ReturnToShopMenuAfterExitingSellMenu
-	adds r0, r5, 0
-	movs r3, 0
-	bl DisplayItemMessageOnField
-_080B3040:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080B3048: .4byte gOtherText_AnythingElse
-_080B304C: .4byte ReturnToShopMenuAfterExitingSellMenu
-	thumb_func_end Task_ExitSellMenu
-
-	thumb_func_start sub_80B3050
-sub_80B3050: @ 80B3050
-	push {lr}
-	bl pal_fill_black
-	ldr r0, _080B3064 @ =Task_ExitSellMenu
-	movs r1, 0x8
-	bl CreateTask
-	pop {r0}
-	bx r0
-	.align 2, 0
-_080B3064: .4byte Task_ExitSellMenu
-	thumb_func_end sub_80B3050
-
-	thumb_func_start sub_80B3068
-sub_80B3068: @ 80B3068
-	push {lr}
-	lsls r0, 24
-	lsrs r0, 24
-	bl Task_ExitSellMenu
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80B3068
-
-	thumb_func_start unref_sub_80B3078
-unref_sub_80B3078: @ 80B3078
-	lsls r0, 24
-	lsrs r0, 24
-	ldr r2, _080B308C @ =gTasks
-	lsls r1, r0, 2
-	adds r1, r0
-	lsls r1, 3
-	adds r1, r2
-	ldr r0, _080B3090 @ =Task_ExitSellMenu
-	str r0, [r1]
-	bx lr
-	.align 2, 0
-_080B308C: .4byte gTasks
-_080B3090: .4byte Task_ExitSellMenu
-	thumb_func_end unref_sub_80B3078
-
-	thumb_func_start sub_80B3094
-sub_80B3094: @ 80B3094
-	push {lr}
-	bl AnimateSprites
-	bl BuildOamBuffer
-	bl RunTasks
-	bl UpdatePaletteFade
-	pop {r0}
-	bx r0
-	thumb_func_end sub_80B3094
-
 	thumb_func_start sub_80B30AC
 sub_80B30AC: @ 80B30AC
 	push {r4,lr}
diff --git a/ld_script.txt b/ld_script.txt
index 4e364d6bc..28de8a235 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -147,6 +147,7 @@ SECTIONS {
         src/item.o(.text);
         src/matsuda_debug_menu.o(.text);
         asm/contest.o(.text);
+        src/shop.o(.text);
         asm/shop.o(.text);
         src/berry.o(.text);
         src/script_menu.o(.text);
diff --git a/src/shop.c b/src/shop.c
new file mode 100644
index 000000000..bab67daba
--- /dev/null
+++ b/src/shop.c
@@ -0,0 +1,199 @@
+#include "global.h"
+#include "menu.h"
+#include "script.h"
+#include "task.h"
+#include "main.h"
+#include "sound.h"
+#include "weather.h"
+#include "palette.h"
+#include "sprite.h"
+
+extern void sub_80B2FA0(u8);
+extern void BuyMenuDrawGraphics(void);
+extern void sub_80A6300(void);
+extern void sub_80BE3BC(void);
+extern void DisplayItemMessageOnField(u8, u8*, TaskFunc, u16);
+extern u8 sub_807D770(void);
+extern void pal_fill_black(void);
+
+struct UnknownShopStruct
+{
+    /* 0x0 */ void (* callback) (void);
+    /* 0x4 */ u16 *itemList;
+    /* 0x8 */ u8 itemCount;
+    /* 0x9 */ u8 unk9;
+    /* 0xA */ u8 unkA;
+    u8 unkB;
+    /* 0xC */ bool8 unkC;
+    // unknown size
+};
+
+extern struct UnknownShopStruct gUnknown_03000708;
+extern struct MenuAction gUnknown_083CC6D0[];
+
+extern u8 gUnknown_083CC6E8[];
+extern u8 gUnknown_083CC6EB[];
+extern u8 gOtherText_CanIHelpYou[];
+extern u8 gOtherText_AnythingElse[];
+
+void sub_80B2E38(u8);
+void HandleShopMenuQuit(u8);
+
+u8 CreateShopMenu(bool8 var)
+{
+    ScriptContext2_Enable();
+    gUnknown_03000708.unkC = var;
+    gUnknown_03000708.unk9 = 0;
+
+    if(var == FALSE)
+    {
+        gUnknown_03000708.unkA = 2;
+        MenuDrawTextWindow(0, 0, 10, 7);
+        PrintMenuItemsReordered(1, 1, 3, gUnknown_083CC6D0, (u8 *)gUnknown_083CC6E8);
+    }
+    else
+    {
+        gUnknown_03000708.unkA = 1;
+        MenuDrawTextWindow(0, 0, 10, 5);
+        PrintMenuItemsReordered(1, 1, 2, gUnknown_083CC6D0, (u8 *)gUnknown_083CC6EB);
+    }
+    InitMenu(0, 1, 1, gUnknown_03000708.unkA + 1, 0, 9);
+    
+    return CreateTask(sub_80B2E38, 8);
+}
+
+void SetShopMenuCallback(void *callbackPtr)
+{
+    gUnknown_03000708.callback = callbackPtr;
+}
+
+void SetShopItemsForSale(u16 *items)
+{
+    u16 i = 0;
+
+    gUnknown_03000708.itemList = items;
+    gUnknown_03000708.itemCount = 0;
+
+    while (gUnknown_03000708.itemList[i])
+    {
+        gUnknown_03000708.itemCount++;
+        i++;
+    }
+}
+
+void sub_80B2E38(u8 var)
+{
+    const u8 local = var;
+
+    if(gMain.newAndRepeatedKeys & 0x40)
+    {
+        if(gUnknown_03000708.unk9)
+        {
+            PlaySE(0x5);
+            gUnknown_03000708.unk9 = MoveMenuCursor(-1);
+        }
+    }
+    else if(gMain.newAndRepeatedKeys & 0x80)
+    {
+        if(gUnknown_03000708.unk9 != gUnknown_03000708.unkA)
+        {
+            PlaySE(0x5);
+            gUnknown_03000708.unk9 = MoveMenuCursor(1);
+        }
+    }
+    else if (gMain.newKeys & 1)
+    {
+        PlaySE(0x5);
+        if(!gUnknown_03000708.unkC)
+        {
+            gUnknown_083CC6D0[gUnknown_083CC6E8[gUnknown_03000708.unk9]].func(local);
+        }
+        else
+        {
+            gUnknown_083CC6D0[gUnknown_083CC6EB[gUnknown_03000708.unk9]].func(local);
+        }
+    }
+    else if(gMain.newKeys & 2)
+    {
+        PlaySE(0x5);
+        HandleShopMenuQuit(local);
+    }
+}
+
+void sub_80B2EFC(u8 taskId)
+{
+    gTasks[taskId].data[8] = (u32)BuyMenuDrawGraphics >> 16;
+    gTasks[taskId].data[9] = (u32)BuyMenuDrawGraphics;
+    gTasks[taskId].func = sub_80B2FA0;
+    fade_screen(1, 0);
+}
+
+void sub_80B2F30(u8 taskId)
+{
+    gTasks[taskId].data[8] = (u32)sub_80A6300 >> 16;
+    gTasks[taskId].data[9] = (u32)sub_80A6300;
+    gTasks[taskId].func = sub_80B2FA0;
+    fade_screen(1, 0);
+}
+
+void HandleShopMenuQuit(u8 taskId)
+{
+    sub_8072DEC();
+    MenuZeroFillWindowRect(0, 0, 11, 8);
+    sub_80BE3BC(); // in tv.s?
+    ScriptContext2_Disable();
+    DestroyTask(taskId);
+    
+    if(gUnknown_03000708.callback)
+        gUnknown_03000708.callback(); // run the callback if it exists.
+}
+
+void sub_80B2FA0(u8 taskId)
+{
+    if(!gPaletteFade.active)
+    {
+        SetMainCallback2((void *)((u16)gTasks[taskId].data[8] << 16 | (u16)gTasks[taskId].data[9]));
+        DestroyTask(taskId);
+    }
+}
+
+void ReturnToShopMenuAfterExitingSellMenu(u8 taskId)
+{
+    CreateShopMenu(gUnknown_03000708.unkC);
+    DestroyTask(taskId);
+}
+
+void Task_ExitSellMenu(u8 taskId)
+{
+    if(sub_807D770() == 1)
+    {
+        if(gUnknown_03000708.unkC == 2)
+            DisplayItemMessageOnField(taskId, gOtherText_CanIHelpYou, ReturnToShopMenuAfterExitingSellMenu, 0);
+        else
+            DisplayItemMessageOnField(taskId, gOtherText_AnythingElse, ReturnToShopMenuAfterExitingSellMenu, 0);
+    }
+}
+
+void sub_80B3050(void)
+{
+    pal_fill_black();
+    CreateTask(Task_ExitSellMenu, 0x8);
+}
+
+void sub_80B3068(u8 taskId)
+{
+    Task_ExitSellMenu(taskId);
+}
+
+void unref_sub_80B3078(u8 taskId)
+{
+    gTasks[taskId].func = Task_ExitSellMenu;
+}
+
+void sub_80B3094(void)
+{
+    AnimateSprites();
+    BuildOamBuffer();
+    RunTasks();
+    UpdatePaletteFade();
+}