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-rw-r--r--src/item_use.c410
1 files changed, 410 insertions, 0 deletions
diff --git a/src/item_use.c b/src/item_use.c
new file mode 100644
index 000000000..fee70d7d2
--- /dev/null
+++ b/src/item_use.c
@@ -0,0 +1,410 @@
+#include "global.h"
+#include "task.h"
+#include "item.h"
+#include "palette.h"
+#include "weather.h"
+#include "string_util.h"
+#include "menu.h"
+#include "mail.h"
+#include "asm.h"
+#include "rom4.h"
+#include "metatile_behavior.h"
+#include "field_player_avatar.h"
+#include "flag.h"
+#include "map_obj_lock.h"
+#include "script.h"
+#include "field_player_avatar.h"
+#include "sound.h"
+
+extern void (* const gUnknown_083D61E4[])();
+extern void (* gUnknown_03005D00)(u8);
+extern void (* gUnknown_0300485C)(void);
+
+extern void sub_80A5B00(u8);
+extern void sub_80A5CC4(void);
+extern void sub_80C8FAC(u8);
+extern void DisplayItemMessageOnField(u8, u8*, TaskFunc, u16);
+extern void sub_80A5C48(u8);
+extern void sub_80A5C9C(u8);
+extern void ItemUseOutOfBattle_TMHM(u8);
+extern void ItemUseOutOfBattle_EvolutionStone(u8);
+extern void ItemUseOnFieldCB_Bike(u8);
+extern void ItemUseOnFieldCB_Rod(u8);
+extern void ItemUseOnFieldCB_Itemfinder(u8);
+extern void sub_80A5D04(void);
+extern bool8 sub_80E5EF4(void);
+extern void GetOnOffBike(u8);
+extern void sub_80C9458(u8);
+extern void sub_80C9520(u8);
+extern u8 sub_80C9908(s16, s16);
+extern void sub_80C997C(u8);
+extern void sub_80C99EC(u8);
+extern void sub_80C9A38(u8);
+
+extern u8 gOtherText_DadsAdvice[];
+extern u8 gOtherText_CantGetOffBike[];
+extern u8 gOtherText_NoResponse[];
+
+extern u8 gUnknown_083D61F0[];
+
+extern u16 gScriptItemId;
+
+bool8 ItemfinderCheckForHiddenItems(struct MapEvents *events, int);
+
+void sub_80C8FAC(u8 taskId)
+{
+ u8 taskData;
+
+ if(gScriptItemId == 0xAF)
+ taskData = gTasks[taskId].data[15] - 1;
+ else
+ taskData = ItemId_GetType(gScriptItemId) - 1;
+
+ gTasks[taskId].data[8] = (u32)gUnknown_083D61E4[taskData] >> 16;
+ gTasks[taskId].data[9] = (u32)gUnknown_083D61E4[taskData];
+ gTasks[taskId].func = sub_80A5B00;
+}
+
+void unknown_ItemMenu_Confirm(u8 var)
+{
+ sub_80C8FAC(var);
+ BeginNormalPaletteFade(0xFFFFFFFF, 0, 0, 16, 0);
+}
+
+void sub_80C9038(u8 var)
+{
+ sub_80C8FAC(var);
+ fade_screen(1, 0);
+}
+
+void SetUpItemUseOnFieldCallback(u8 taskId)
+{
+ if(gTasks[taskId].data[2] != 1)
+ {
+ gUnknown_0300485C = (void *)sub_80A5CC4;
+ unknown_ItemMenu_Confirm(taskId);
+ }
+ else
+ gUnknown_03005D00(taskId);
+}
+
+void sub_80C9098(u8 var1, u8 var2, const u8 *var3)
+{
+ StringExpandPlaceholders(gStringVar4, var3);
+
+ if(!var2)
+ {
+ MenuZeroFillWindowRect(0, 13, 13, 20);
+ DisplayItemMessageOnField(var1, gStringVar4, sub_80A5C48, 1);
+ }
+ else
+ DisplayItemMessageOnField(var1, gStringVar4, sub_80A5C9C, 0);
+}
+
+void DisplayDadsAdviceCannotUseItemMessage(u8 var1, u8 var2)
+{
+ sub_80C9098(var1, var2, gOtherText_DadsAdvice);
+}
+
+void sub_80C9104(u8 var1, u8 var2)
+{
+ sub_80C9098(var1, var2, gOtherText_CantGetOffBike);
+}
+
+u8 CheckIfItemIsTMHMOrEvolutionStone(u16 itemId)
+{
+ if(ItemId_GetFieldFunc(itemId) == ItemUseOutOfBattle_TMHM)
+ return 1;
+ else if(ItemId_GetFieldFunc(itemId) == ItemUseOutOfBattle_EvolutionStone)
+ return 2;
+ else
+ return 0;
+}
+
+void sub_80C9154(u8 taskId)
+{
+ struct MailStruct mailStruct;
+
+ if(!gPaletteFade.active)
+ {
+ mailStruct.var20 = gScriptItemId;
+ sub_80F890C(&mailStruct, sub_80A5D04, 0);
+ DestroyTask(taskId);
+ }
+}
+
+void ItemUseOutOfBattle_Mail(u8 taskId)
+{
+ BeginNormalPaletteFade(0xFFFFFFFF, 0, 0, 16, 0);
+ gTasks[taskId].func = sub_80C9154;
+}
+
+void ItemUseOutOfBattle_Bike(u8 taskId)
+{
+ s16 x, y;
+ u8 tileBehavior;
+
+ PlayerGetDestCoords(&x, &y);
+ tileBehavior = MapGridGetMetatileBehaviorAt(x, y);
+
+ if(FlagGet(0x82B) == TRUE
+ || MetatileBehavior_IsVerticalRail(tileBehavior) == TRUE
+ || MetatileBehavior_IsHorizontalRail(tileBehavior) == TRUE
+ || MetatileBehavior_IsIsolatedVerticalRail(tileBehavior) == TRUE
+ || MetatileBehavior_IsIsolatedHorizontalRail(tileBehavior) == TRUE)
+ {
+ sub_80C9104(taskId, gTasks[taskId].data[2]);
+ }
+ else
+ {
+ if(sub_8053C44() == TRUE && sub_80E5EF4() == FALSE)
+ {
+ gUnknown_03005D00 = (void *)ItemUseOnFieldCB_Bike;
+ SetUpItemUseOnFieldCallback(taskId);
+ }
+ else
+ DisplayDadsAdviceCannotUseItemMessage(taskId, gTasks[taskId].data[2]);
+ }
+}
+
+void ItemUseOnFieldCB_Bike(u8 taskId)
+{
+ if(ItemId_GetSecondaryId(gScriptItemId) == 0)
+ GetOnOffBike(2);
+ if(ItemId_GetSecondaryId(gScriptItemId) == 1)
+ GetOnOffBike(4);
+
+ sub_8064E2C();
+ ScriptContext2_Disable();
+ DestroyTask(taskId);
+}
+
+bool32 CanFish(void)
+{
+ s16 x, y;
+ u16 tileBehavior;
+
+ GetXYCoordsOneStepInFrontOfPlayer(&x, &y);
+ tileBehavior = MapGridGetMetatileBehaviorAt(x, y);
+
+ if (MetatileBehavior_IsWaterfall(tileBehavior))
+ return FALSE;
+
+ if (TestPlayerAvatarFlags(PLAYER_AVATAR_FLAG_4))
+ return FALSE;
+
+ if (!TestPlayerAvatarFlags(PLAYER_AVATAR_FLAG_SURFING))
+ {
+ if (IsPlayerFacingSurfableFishableWater())
+ return TRUE;
+ }
+ else
+ {
+ if (MetatileBehavior_IsSurfableWaterOrUnderwater(tileBehavior) && !MapGridIsImpassableAt(x, y))
+ return TRUE;
+ if (MetatileBehavior_IsBridge(tileBehavior) == TRUE)
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+void ItemUseOutOfBattle_Rod(u8 taskId)
+{
+ if(CanFish() == TRUE)
+ {
+ gUnknown_03005D00 = (void *)ItemUseOnFieldCB_Rod;
+ SetUpItemUseOnFieldCallback(taskId);
+ }
+ else
+ DisplayDadsAdviceCannotUseItemMessage(taskId, gTasks[taskId].data[2]);
+}
+
+void ItemUseOnFieldCB_Rod(u8 taskId)
+{
+ StartFishing(ItemId_GetSecondaryId(gScriptItemId));
+ DestroyTask(taskId);
+}
+
+void ItemUseOutOfBattle_Itemfinder(u8 var)
+{
+ sav12_xor_increment(0x27);
+ gUnknown_03005D00 = (void *)ItemUseOnFieldCB_Itemfinder;
+ SetUpItemUseOnFieldCallback(var);
+}
+
+void ItemUseOnFieldCB_Itemfinder(u8 taskId)
+{
+ if(ItemfinderCheckForHiddenItems(gMapHeader.events, taskId) == TRUE)
+ gTasks[taskId].func = sub_80C9458;
+ else
+ DisplayItemMessageOnField(taskId, gOtherText_NoResponse, sub_80C9520, 0);
+}
+
+void sub_80C9458(u8 taskId)
+{
+ u8 var;
+ u8 playerDir;
+ u8 i;
+ s16 *data = gTasks[taskId].data;
+
+ if(!data[3])
+ {
+ if(data[4] == 4)
+ {
+ var = sub_80C9908(data[0], data[1]);
+ if(var)
+ {
+ sub_80C997C(gUnknown_083D61F0[var - 1]);
+ gTasks[taskId].func = sub_80C99EC;
+ }
+ else
+ {
+ playerDir = player_get_direction_lower_nybble();
+
+ for (i = 0; i < 4; i++)
+ if (playerDir == gUnknown_083D61F0[i])
+ data[5] = (i + 1) & 3;
+
+ gTasks[taskId].func = sub_80C9A38;
+ data[3] = 0;
+ data[2] = 0;
+ }
+ return;
+ }
+ PlaySE(0x48);
+ data[4]++;
+ }
+ data[3] = (data[3] + 1) & 0x1F;
+}
+
+void sub_80C9520(u8 taskId)
+{
+ MenuZeroFillWindowRect(0, 14, 29, 19);
+ sub_8064E2C();
+ ScriptContext2_Disable();
+ DestroyTask(taskId);
+}
+
+// too much struct math.
+__attribute__((naked))
+bool8 ItemfinderCheckForHiddenItems(struct MapEvents *events, int var)
+{
+ asm(".syntax unified\n\
+ push {r4-r7,lr}\n\
+ mov r7, r9\n\
+ mov r6, r8\n\
+ push {r6,r7}\n\
+ sub sp, 0x4\n\
+ adds r5, r0, 0\n\
+ lsls r1, 24\n\
+ lsrs r6, r1, 24\n\
+ mov r4, sp\n\
+ adds r4, 0x2\n\
+ mov r0, sp\n\
+ adds r1, r4, 0\n\
+ bl PlayerGetDestCoords\n\
+ ldr r1, _080C9618 @ =gTasks\n\
+ lsls r0, r6, 2\n\
+ adds r0, r6\n\
+ lsls r0, 3\n\
+ adds r0, r1\n\
+ movs r1, 0\n\
+ strh r1, [r0, 0xC]\n\
+ movs r3, 0\n\
+ mov r9, r4\n\
+ ldrb r0, [r5, 0x3]\n\
+ cmp r3, r0\n\
+ bge _080C95FC\n\
+ subs r1, 0x5\n\
+ mov r8, r1\n\
+_080C9580:\n\
+ lsls r3, 16\n\
+ asrs r1, r3, 16\n\
+ ldr r2, [r5, 0x10]\n\
+ lsls r0, r1, 1\n\
+ adds r0, r1\n\
+ lsls r4, r0, 2\n\
+ adds r1, r4, r2\n\
+ ldrb r0, [r1, 0x5]\n\
+ adds r7, r3, 0\n\
+ cmp r0, 0x7\n\
+ bne _080C95EC\n\
+ movs r2, 0x96\n\
+ lsls r2, 2\n\
+ adds r0, r2, 0\n\
+ ldrh r1, [r1, 0xA]\n\
+ adds r0, r1\n\
+ lsls r0, 16\n\
+ lsrs r0, 16\n\
+ bl FlagGet\n\
+ lsls r0, 24\n\
+ cmp r0, 0\n\
+ bne _080C95EC\n\
+ ldr r1, [r5, 0x10]\n\
+ adds r1, r4, r1\n\
+ ldrh r2, [r1]\n\
+ adds r2, 0x7\n\
+ mov r0, sp\n\
+ ldrh r0, [r0]\n\
+ subs r2, r0\n\
+ ldrh r0, [r1, 0x2]\n\
+ adds r0, 0x7\n\
+ mov r3, r9\n\
+ ldrh r1, [r3]\n\
+ subs r0, r1\n\
+ lsls r0, 16\n\
+ lsrs r0, 16\n\
+ lsls r2, 16\n\
+ asrs r1, r2, 16\n\
+ movs r3, 0xE0\n\
+ lsls r3, 11\n\
+ adds r2, r3\n\
+ lsrs r2, 16\n\
+ cmp r2, 0xE\n\
+ bhi _080C95EC\n\
+ lsls r0, 16\n\
+ asrs r2, r0, 16\n\
+ cmp r2, r8\n\
+ blt _080C95EC\n\
+ cmp r2, 0x5\n\
+ bgt _080C95EC\n\
+ adds r0, r6, 0\n\
+ bl sub_80C9838\n\
+_080C95EC:\n\
+ movs r1, 0x80\n\
+ lsls r1, 9\n\
+ adds r0, r7, r1\n\
+ lsrs r3, r0, 16\n\
+ asrs r0, 16\n\
+ ldrb r2, [r5, 0x3]\n\
+ cmp r0, r2\n\
+ blt _080C9580\n\
+_080C95FC:\n\
+ adds r0, r6, 0\n\
+ bl sub_80C9720\n\
+ ldr r0, _080C9618 @ =gTasks\n\
+ lsls r1, r6, 2\n\
+ adds r1, r6\n\
+ lsls r1, 3\n\
+ adds r1, r0\n\
+ movs r3, 0xC\n\
+ ldrsh r0, [r1, r3]\n\
+ cmp r0, 0x1\n\
+ beq _080C961C\n\
+ movs r0, 0\n\
+ b _080C961E\n\
+ .align 2, 0\n\
+_080C9618: .4byte gTasks\n\
+_080C961C:\n\
+ movs r0, 0x1\n\
+_080C961E:\n\
+ add sp, 0x4\n\
+ pop {r3,r4}\n\
+ mov r8, r3\n\
+ mov r9, r4\n\
+ pop {r4-r7}\n\
+ pop {r1}\n\
+ bx r1\n\
+ .syntax divided");
+}
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