Determining item quality?

[Tanaris4]

So if I already have the base address of my item (and all things that come w/that, id, etc...) How can I determine the item quality?

Is this stored in one of the flags w/in UNIT_FIELDS or do I need to consult the wow dbc to find this?

I took a look at this:

int __cdecl lua_GetInventoryItemQuality(int a1)
{
  int result; // eax@1
  int v2; // ebx@1
  int v3; // edi@3
  int v4; // eax@5
  __int64 v5; // qax@5
  int v6; // ebx@5
  int v7; // esi@5
  int v8; // eax@7
  int v9; // eax@8
  int v10; // edi@8
  int v11; // eax@9
  int v12; // edx@10
  int v13; // [sp+14h] [bp-Ch]@8
  char *v14; // [sp+18h] [bp-8h]@1
  int v15; // [sp+1Ch] [bp-4h]@1

  v2 = 0;
  v15 = 0;
  result = sub_749510(&v14, &v15);
  if ( result )
  {
    v3 = GetUnitFromName(v14);
    if ( (unsigned __int8)sub_6E1C80(v3) )
    {
      if ( v15 == -1 )
      {
        v4 = *(_DWORD *)(v3 + 8);
        v7 = *(_DWORD *)v4;
        v6 = *(_DWORD *)(v4 + 4);
        v5 = ClntObjMgrGetActivePlayer();
        if ( v7 != (_DWORD)v5 || v6 != HIDWORD(v5) || (v8 = sub_4D2A40(v3), !v8) )
          goto LABEL_16;
        v10 = *(_DWORD *)(v3 + 8);
        v13 = *(_DWORD *)v10;
        v14 = *(char **)(v10 + 4);
        v9 = DBItemCache_GetInfoBlockByID(v8, &v13, sub_748ED0, 0, 0);
        v2 = 0;
      }
      else
      {
        v11 = GetBagItem(v3 + 6384, v15);
        if ( !v11 )
          goto LABEL_16;
        v12 = *(_DWORD *)(v11 + 8);
        v13 = 0;
        v14 = 0;
        v9 = DBItemCache_GetInfoBlockByID(*(_DWORD *)(v12 + 12), &v13, 0, 0, 0);
      }
      if ( v9 != v2 )
      {
        if ( *(_DWORD *)(v9 + 40) == v2 )
          v15 = -1;
        else
          v15 = *(_DWORD *)(v9 + 20);
        FrameScript_PushNumber(a1, (double)v15);
        return 1;
      }
    }
LABEL_16:
    FrameScript_pushnil(a1);
    result = 1;
  }
  return result;
}

And i *think* it's getting it from the cache (so not unit fields, and not the wow dbc). Is this a correct assumption? I haven't reversed the cache + understood how to read it yet so just want to be sure before I waste hours of work

[Kirth]

AFAIK Quality is not stored in the DBC files. Hence it probably fetches it from the client or the cache.

[Apoc]

Item quality is stored in the cache entries.

Not sure if this is up to date or not (haven't gotten to this part of my rewrite yet)

        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
        public struct ItemInfo
        {
            public int EntryLength;
            public int ClassId;
            public int SubClassId;
            public int Unk0;
            public int DisplayInfoId;
            public int Rarity;
            public int TypeFlags;
            public int BuyPrice;
            public int Faction;
            public int SellPrice;
            public int EquipSlot;
            public int AllowedClasses;
            public int AllowedRaces;
            public int ItemLevel;
            public int RequiredLevel;
            public int RequiredSkill;
            public int RequiredSkillLevel;
            public int RequireSpell;
            public int RequiredHonorRank;
            public int RequiredCityRank;
            public int RequiredReputationFaction;
            public int RequiredReputationRank;
            public int UniqueCount;
            public int MaxStackSize;
            public int BagSlots;
            public int NumberOfStats;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 10, ArraySubType = UnmanagedType.I4)]
            public int[] StatId;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 10, ArraySubType = UnmanagedType.I4)]
            public int[] StatValue;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2, ArraySubType = UnmanagedType.I4)]
            public int[] Unk1;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2, ArraySubType = UnmanagedType.R4)]
            public float[] DamageMin;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2, ArraySubType = UnmanagedType.R4)]
            public float[] DamageMax;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2, ArraySubType = UnmanagedType.I4)]
            public int[] DamageType;
            public int ResistPhysical_Armor;
            public int ResistHoly;
            public int ResistFire;
            public int ResistNature;
            public int ResistFrost;
            public int ResistShadow;
            public int ResistArcane;
            public int WeaponDelay;
            public int AmmoType;
            public float RangeModifier;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5, ArraySubType = UnmanagedType.I4)]
            public int[] SpellId;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5, ArraySubType = UnmanagedType.I4)]
            public int[] SpellTriggerId;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5, ArraySubType = UnmanagedType.I4)]
            public int[] SpellCharges;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5, ArraySubType = UnmanagedType.I4)]
            public int[] SpellCooldown;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5, ArraySubType = UnmanagedType.I4)]
            public int[] SpellCategory;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5, ArraySubType = UnmanagedType.I4)]
            public int[] SpellCategoryCooldown;
            public int BondId;
            [MarshalAs(UnmanagedType.LPStr)]
            public string Description;
            public int BookTextId;
            public int BookPages;
            public int BookStationaryId;
            public int BeginQuestId;
            public int LockPickSkillRequired;
            public int MaterialId;
            public int SheathId;
            public int RandomPropertyId;
            public int RandomPropertyId2;
            public int BlockValue;
            public int ItemSetId;
            public int DurabilityValue;
            public int ItemAreaId;
            public int ItemMapId;
            public int BagFamily;
            public int totemCategory;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3, ArraySubType = UnmanagedType.I4)]
            public int[] SocketColor;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3, ArraySubType = UnmanagedType.I4)]
            public int[] SocketUnk;
            public int SocketBonus;
            public int GemProperties;
            public int DisenchantSkillLevel;
            public float ArmorDamageModifier;
            public int ItemExtendedCost;
            public int ItemLimitId;
            public int Unk2;
            [MarshalAs(UnmanagedType.LPStr)]
            public string Name;
        }

        /// <summary>
        ///   Typedef for the virtual DbCache_GetInfoBlockById func. Some caches take extra params, but most (all) can
        ///   be passed the ID/Index of the cache, and then the rest passed as 0.
        /// </summary>
        /// <param name = "instance">'this' needs to be the specific cache type pointer</param>
        /// <param name = "id">The ID to search</param>
        /// <param name = "guid">A GUID to the cache object in question; if one exists.</param>
        /// <param name = "a4"></param>
        /// <param name = "a5"></param>
        /// <param name = "a6"></param>
        /// <returns>A pointer to an info block (struct) depending on the type of cache, and function pointer/cache pointer.</returns>
        [UnmanagedFunctionPointer(CallingConvention.ThisCall)]
        private delegate IntPtr GetInfoBlockByIdDelegate(IntPtr instance, int id, ref ulong guid, int a4, int a5, int a6);