private List <List <int> > MergeItem(List <List <int> > item_list)
{
TwoKeyDictionary <int, int, List <int> > map = new TwoKeyDictionary <int, int, List <int> >();
foreach (List <int> item_info in item_list)
{
int item_id = 0, count = 0, bind = 0, addition = 0;
bool result = CustomFormat.ParseItemInfo(item_info, ref item_id, ref count, ref bind, ref addition);
if (!result)
{
return(null);
}
List <int> info = map.Get(item_id, bind);
if (info == null)
{
info = new List <int> {
item_id, 0, bind, addition
};
}
info[2] += count;
map.Set(item_id, bind, info);
}
return(map.ToList());
}