decompile item.c (#91)

* start decompiling

* decompile item.c

* use static

1 files changed, 530 insertions, 0 deletions

diff --git a/src/item.c b/src/item.c
new file mode 100644
index 000000000..8bc0cf0f0
--- /dev/null
+++ b/src/item.c
@@ -0,0 +1,530 @@
+#include "global.h"
+#include "berry.h"
+#include "string_util.h"
+
+extern struct Berry *GetBerryInfo(u8 berry);
+
+extern u8 gOtherText_Berry2[];
+extern u8 gUnknown_02038560;
+
+typedef void (*ItemUseFunc)(u8);
+
+struct Item
+{
+    u8 name[14];
+    u16 itemId;
+    u16 price;
+    u8 holdEffect;
+    u8 holdEffectParam;
+    u8 *description;
+    u8 importance;
+    u8 unk19;
+    u8 pocket;
+    u8 type;
+    ItemUseFunc fieldUseFunc;
+    u8 battleUsage;
+    ItemUseFunc battleUseFunc;
+    u8 secondaryId;
+};
+
+extern struct Item gItems[];
+
+struct BagPocket
+{
+    struct ItemSlot *itemSlots;
+    u8 capacity;
+};
+
+extern struct BagPocket gBagPockets[5];
+
+enum
+{
+    ITEMS_POCKET,
+    BALLS_POCKET,
+    TMHM_POCKET,
+    BERRIES_POCKET,
+    KEYITEMS_POCKET
+};
+
+struct Item *ItemId_GetItem(u16);
+u8 ItemId_GetPocket(u16);
+static void CompactPCItems(void);
+
+void CopyItemName(u16 itemId, u8 *string)
+{
+    if (itemId == 0xAF)
+    {
+        StringCopy(string, GetBerryInfo(0x2B)->name);
+        StringAppend(string, gOtherText_Berry2);
+    }
+    else
+        StringCopy(string, ItemId_GetItem(itemId)->name);
+}
+
+//Unreferenced
+static s8 CountUsedBagPocketSlots(u8 pocket)
+{
+    u8 i;
+    
+    for (i = 0; i < gBagPockets[pocket].capacity; i++)
+    {
+        if (gBagPockets[pocket].itemSlots[i].itemId == 0)
+            return i;
+    }
+    return -1;
+}
+
+bool8 IsBagPocketNonEmpty(u8 pocket)
+{
+    u8 i;
+    
+    for (i = 0; i < gBagPockets[pocket - 1].capacity; i++)
+    {
+        if (gBagPockets[pocket - 1].itemSlots[i].itemId != 0)
+            return TRUE;
+    }
+    return FALSE;
+}
+
+bool8 CheckBagHasItem(u16 itemId, u16 count)
+{
+    u8 i;
+    u8 pocket;
+    
+    if (ItemId_GetPocket(itemId) == 0)
+        return FALSE;
+    pocket = ItemId_GetPocket(itemId) - 1;
+    //Check for item slots that contain the item
+    for (i = 0; i < gBagPockets[pocket].capacity; i++)
+    {
+        if (gBagPockets[pocket].itemSlots[i].itemId == itemId)
+        {
+            //Does this item slot contain enough of the item?
+            if (gBagPockets[pocket].itemSlots[i].quantity >= count)
+                return TRUE;
+            count -= gBagPockets[pocket].itemSlots[i].quantity;
+            //Does this item slot and all previous slots contain enough of the item?
+            if (count == 0)
+                return TRUE;
+        }
+    }
+    return FALSE;
+}
+
+bool8 CheckBagHasSpace(u16 itemId, u16 count)
+{
+    u8 i;
+    u8 pocket;
+    u16 slotCapacity;
+    
+    if (ItemId_GetPocket(itemId) == 0)
+        return FALSE;
+    pocket = ItemId_GetPocket(itemId) - 1;
+    if (pocket != BERRIES_POCKET)
+        slotCapacity = 99;
+    else
+        slotCapacity = 999;
+    
+    //Check space in any existing item slots that already contain this item
+    for (i = 0; i < gBagPockets[pocket].capacity; i++)
+    {
+        if (gBagPockets[pocket].itemSlots[i].itemId == itemId)
+        {
+            if (gBagPockets[pocket].itemSlots[i].quantity + count <= slotCapacity)
+                return TRUE;
+            if (pocket == TMHM_POCKET || pocket == BERRIES_POCKET)
+                return FALSE;
+            count -= slotCapacity - gBagPockets[pocket].itemSlots[i].quantity;
+            if (count == 0)
+                return TRUE;
+        }
+    }
+    
+    //Check space in empty item slots
+    if (count > 0)
+    {
+        for (i = 0; i < gBagPockets[pocket].capacity; i++)
+        {
+            if (gBagPockets[pocket].itemSlots[i].itemId == 0)
+            {
+                if (count <= slotCapacity)
+                    return TRUE;
+                else
+                    count -= slotCapacity;
+            }
+        }
+        if (count > 0)
+            return FALSE; //No more item slots. The bag is full
+    }
+    
+    return TRUE;
+}
+
+bool8 AddBagItem(u16 itemId, u16 count)
+{
+    u8 i;
+    u8 pocket;
+    u16 slotCapacity;
+    struct ItemSlot newItems[64];
+    
+    if (ItemId_GetPocket(itemId) == 0)
+        return FALSE;
+    pocket = ItemId_GetPocket(itemId) - 1;
+    //Copy the bag pocket
+    memcpy(newItems, gBagPockets[pocket].itemSlots, gBagPockets[pocket].capacity * sizeof(struct ItemSlot));
+    if (pocket != BERRIES_POCKET)
+        slotCapacity = 99;
+    else
+        slotCapacity = 999;
+    
+    //Use any item slots that already contain this item
+    for (i = 0; i < gBagPockets[pocket].capacity; i++)
+    {
+        if (newItems[i].itemId == itemId)
+        {
+            if (newItems[i].quantity + count <= slotCapacity)
+            {
+                newItems[i].quantity += count;
+                //Copy pocket back into the bag.
+                memcpy(gBagPockets[pocket].itemSlots, newItems, gBagPockets[pocket].capacity * sizeof(struct ItemSlot));
+                return TRUE;
+            }
+            if (pocket == TMHM_POCKET || pocket == BERRIES_POCKET)
+                return FALSE;
+            count -= slotCapacity - newItems[i].quantity;
+            newItems[i].quantity = slotCapacity;
+            if (count == 0)
+                goto copy_items;
+        }
+    }
+    
+    //Put any remaining items into new item slots.
+    if (count > 0)
+    {
+        for (i = 0; i < gBagPockets[pocket].capacity; i++)
+        {
+            if (newItems[i].itemId == 0)
+            {
+                newItems[i].itemId = itemId;
+                if (count <= slotCapacity)
+                {
+                    newItems[i].quantity = count;
+                    goto copy_items;
+                }
+                count -= slotCapacity;
+                newItems[i].quantity = slotCapacity;
+            }
+        }
+        if (count > 0)
+            return FALSE;   //No more empty item slots. The bag is full.
+    }
+    
+  copy_items:
+    //Copy pocket back into the bag.
+    memcpy(gBagPockets[pocket].itemSlots, newItems, gBagPockets[pocket].capacity * sizeof(struct ItemSlot));
+    return TRUE;
+}
+
+bool8 RemoveBagItem(u16 itemId, u16 count)
+{
+    u8 i;
+    u8 pocket;
+    u16 totalQuantity = 0;
+    
+    if (ItemId_GetPocket(itemId) == 0 || itemId == 0)
+        return FALSE;
+    pocket = ItemId_GetPocket(itemId) - 1;
+    
+    for (i = 0; i < gBagPockets[pocket].capacity; i++)
+    {
+        if (gBagPockets[pocket].itemSlots[i].itemId == itemId)
+            totalQuantity += gBagPockets[pocket].itemSlots[i].quantity;
+    }
+    if (totalQuantity < count)
+        return FALSE;   //We don't have enough of the item
+    
+    if (gBagPockets[pocket].capacity > gUnknown_02038560
+     && gBagPockets[pocket].itemSlots[gUnknown_02038560].itemId == itemId)
+    {
+        if (gBagPockets[pocket].itemSlots[gUnknown_02038560].quantity >= count)
+        {
+            gBagPockets[pocket].itemSlots[gUnknown_02038560].quantity -= count;
+            count = 0;
+        }
+        else
+        {
+            count -= gBagPockets[pocket].itemSlots[gUnknown_02038560].quantity;
+            gBagPockets[pocket].itemSlots[gUnknown_02038560].quantity = 0;
+        }
+        if (gBagPockets[pocket].itemSlots[gUnknown_02038560].quantity == 0)
+            gBagPockets[pocket].itemSlots[gUnknown_02038560].itemId = 0;
+        if (count == 0)
+            return TRUE;
+    }
+    
+    for (i = 0; i < gBagPockets[pocket].capacity; i++)
+    {
+        if (gBagPockets[pocket].itemSlots[i].itemId == itemId)
+        {
+            if (gBagPockets[pocket].itemSlots[i].quantity >= count)
+            {
+                gBagPockets[pocket].itemSlots[i].quantity -= count;
+                count = 0;
+            }
+            else
+            {
+                count -= gBagPockets[pocket].itemSlots[i].quantity;
+                gBagPockets[pocket].itemSlots[i].quantity = 0;
+            }
+            if (gBagPockets[pocket].itemSlots[i].quantity == 0)
+                gBagPockets[pocket].itemSlots[i].itemId = 0;
+            if (count == 0)
+                return TRUE;
+        }
+    }
+    return TRUE;
+}
+
+u8 GetPocketByItemId(u16 itemId)
+{
+    return ItemId_GetPocket(itemId);
+}
+
+void ClearItemSlots(struct ItemSlot *itemSlots, u8 b)
+{
+    u16 i;
+    
+    for (i = 0; i < b; i++)
+    {
+        itemSlots[i].itemId = 0;
+        itemSlots[i].quantity = 0;
+    }
+}
+
+static s32 FindFreePCItemSlot(void)
+{
+    s8 i;
+    
+    for (i = 0; i < 50; i++)
+    {
+        if (gSaveBlock1.pcItems[i].itemId == 0)
+            return i;
+    }
+    return -1;
+}
+
+u8 CountUsedPCItemSlots(void)
+{
+    u8 usedSlots = 0;
+    u8 i;
+    
+    for (i = 0; i < 50; i++)
+    {
+        if (gSaveBlock1.pcItems[i].itemId != 0)
+            usedSlots++;
+    }
+    return usedSlots;
+}
+
+bool8 CheckPCHasItem(u16 itemId, u16 count)
+{
+    u8 i;
+    
+    for (i = 0; i < 50; i++)
+    {
+        if (gSaveBlock1.pcItems[i].itemId == itemId && gSaveBlock1.pcItems[i].quantity >= count)
+            return TRUE;
+    }
+    return FALSE;
+}
+
+bool8 AddPCItem(u16 itemId, u16 count)
+{
+    u8 i;
+    s8 freeSlot;
+    struct ItemSlot newItems[50];
+    
+    //Copy PC items
+    memcpy(newItems, gSaveBlock1.pcItems, sizeof(newItems));
+    
+    //Use any item slots that already contain this item
+    for (i = 0; i < 50; i++)
+    {
+        if (newItems[i].itemId == itemId)
+        {
+            if (newItems[i].quantity + count <= 999)
+            {
+                newItems[i].quantity += count;
+                memcpy(gSaveBlock1.pcItems, newItems, sizeof(gSaveBlock1.pcItems));
+                return TRUE;
+            }
+            count += newItems[i].quantity - 999;
+            newItems[i].quantity = 999;
+            if (count == 0)
+            {
+                memcpy(gSaveBlock1.pcItems, newItems, sizeof(gSaveBlock1.pcItems));
+                return TRUE;
+            }
+        }
+    }
+    
+    //Put any remaining items into a new item slot.
+    if (count > 0)
+    {
+        freeSlot = FindFreePCItemSlot();
+        if (freeSlot == -1)
+            return FALSE;
+        newItems[freeSlot].itemId = itemId;
+        newItems[freeSlot].quantity = count;
+    }
+    
+    //Copy items back to the PC
+    memcpy(gSaveBlock1.pcItems, newItems, sizeof(gSaveBlock1.pcItems));
+    return TRUE;
+}
+
+void RemovePCItem(u8 index, u16 count)
+{
+    gSaveBlock1.pcItems[index].quantity -= count;
+    if (gSaveBlock1.pcItems[index].quantity == 0)
+    {
+        gSaveBlock1.pcItems[index].itemId = 0;
+        CompactPCItems();
+    }
+}
+
+static void CompactPCItems(void)
+{
+    u16 i;
+    u16 j;
+    
+    for (i = 0; i < 49; i++)
+    {
+        for (j = i + 1; j <= 49; j++)
+        {
+            if (gSaveBlock1.pcItems[i].itemId == 0)
+            {
+                struct ItemSlot temp = gSaveBlock1.pcItems[i];
+                gSaveBlock1.pcItems[i] = gSaveBlock1.pcItems[j];
+                gSaveBlock1.pcItems[j] = temp;
+            }
+        }
+    }
+}
+
+void SwapRegisteredBike(void)
+{
+    switch(gSaveBlock1.registeredItem)
+    {
+    case 0x103:
+        gSaveBlock1.registeredItem = 0x110;
+        break;
+    case 0x110:
+        gSaveBlock1.registeredItem = 0x103;
+        break;
+    }
+}
+
+static u16 SanitizeItemId(u16 itemId)
+{
+    if (itemId > 0x15C)
+        return 0;
+    else
+        return itemId;
+}
+
+struct Item *ItemId_GetItem(u16 itemId)
+{
+    return &gItems[SanitizeItemId(itemId)];
+}
+
+u16 ItemId_GetId(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].itemId;
+}
+
+u16 ItemId_GetPrice(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].price;
+}
+
+u8 ItemId_GetHoldEffect(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].holdEffect;
+}
+
+u8 ItemId_GetHoldEffectParam(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].holdEffectParam;
+}
+
+u8 *ItemId_GetDescription(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].description;
+}
+
+bool8 ItemId_CopyDescription(u8 *a, u32 itemId, u32 c)
+{
+    u32 r5 = c + 1;
+    u8 *description = gItems[SanitizeItemId(itemId)].description;
+    u8 *str = a;
+    
+    for (;;)
+    {
+        if (*description == 0xFF || *description == 0xFE)
+        {
+            r5--;
+            if (r5 == 0)
+            {
+                *str = 0xFF;
+                return TRUE;
+            }
+            if (*description == 0xFF)
+                return FALSE;
+            str = a;
+            description++;
+        }
+        else
+            *(str++) = *(description++);
+    }
+}
+
+u8 ItemId_GetImportance(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].importance;
+}
+
+u8 ItemId_GetUnknownValue(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].unk19;
+}
+
+u8 ItemId_GetPocket(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].pocket;
+}
+
+u8 ItemId_GetType(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].type;
+}
+
+ItemUseFunc ItemId_GetFieldFunc(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].fieldUseFunc;
+}
+
+u8 ItemId_GetBattleUsage(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].battleUsage;
+}
+
+ItemUseFunc ItemId_GetBattleFunc(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].battleUseFunc;
+}
+
+u8 ItemId_GetSecondaryId(u16 itemId)
+{
+    return gItems[SanitizeItemId(itemId)].secondaryId;
+}