source: binary-improvements/7dtd-server-fixes/src/PlayerDataStuff.cs@ 134

using System;
using System.Collections.Generic;

namespace AllocsFixes
{
        public class PlayerDataStuff
        {
                public class PlayerItems
                {
                        public SortedList<string, int> belt = new SortedList<string, int> ();
                        public SortedList<string, int> bag = new SortedList<string, int> ();

                        public PlayerItems (InventoryField[] _belt, InventoryField[] _bag)
                        {
                                foreach (InventoryField item in _belt) {
                                        if (item.count > 0) {
                                                string name = getInvFieldName (item);
                                                if (belt.ContainsKey (name)) {
                                                        belt [name] += item.count;
                                                } else {
                                                        belt.Add (name, item.count);
                                                }
                                        }
                                }

                                foreach (InventoryField item in _bag) {
                                        if (item.count > 0) {
                                                string name = getInvFieldName (item);
                                                if (bag.ContainsKey (name)) {
                                                        bag [name] += item.count;
                                                } else {
                                                        bag.Add (name, item.count);
                                                }
                                        }
                                }
                        }
                };

                private static Dictionary<int, PlayerItems> itemsPerEntityId = new Dictionary<int, PlayerItems> ();

                public static PlayerItems GetPlayerItems (int entityId)
                {
                        if (itemsPerEntityId.ContainsKey (entityId))
                                return itemsPerEntityId [entityId];
                        else
                                return null;
                }

                public static void GM_SavePlayerData (GameManager manager, int _clientId, PlayerDataFile _playerDataFile)
                {
                        try {
                                int entityId = CommonMappingFunctions.GetEntityID (CommonMappingFunctions.GetClientInfoFromClientID (_clientId));
                                if (entityId >= 0) {
                                        Log.Out ("Saving playerData for entity id: " + entityId);

                                        if (itemsPerEntityId.ContainsKey (entityId))
                                                itemsPerEntityId.Remove (entityId);
                                        itemsPerEntityId.Add (entityId, new PlayerItems (_playerDataFile.inventory, _playerDataFile.bag));
                                }
                        } catch (Exception e) {
                                Log.Out ("Error in GM_SavePlayerData: " + e);
                        }

//              Log.Out ("Inventory of player:");
//              for (int i = 0; i < _playerDataFile.inventory.Length; i++) {
//                      InventoryField item = _playerDataFile.inventory [i];
//                      printItem (item, i);
//              }
//
//              Log.Out ("Bag of player:");
//              for (int i = 0; i < _playerDataFile.bag.Length; i++) {
//                      InventoryField item = _playerDataFile.bag [i];
//                      printItem (item, i);
//              }
                }

                private static string getInvFieldName (InventoryField item)
                {
                        ItemBase iBase = ItemBase.list [item.itemValue.type];
                        string name = iBase.name;
                        if (iBase.IsBlock ()) {
                                ItemBlock iBlock = (ItemBlock)iBase;
                                name = iBlock.GetItemName (item.itemValue);
                        }
                        return name;
                }

                private static void printItem (InventoryField item, int slot)
                {
                        if (item.count > 0) {
                                ItemBase iBase = ItemBase.list [item.itemValue.type];
                                string name = iBase.name;
                                if (iBase.IsBlock ()) {
                                        ItemBlock iBlock = (ItemBlock)iBase;
                                        name = iBlock.GetItemName (item.itemValue);
                                }
                                Log.Out (string.Format ("Slot {0:00}: {1:00} * {2}, blockinst={3}, meta={4}, type={5}, usetimes={6}",
                                                slot, item.count, name, item.itemValue.blockinst, item.itemValue.meta, item.itemValue.type, item.itemValue.usetimes)
                                );
                        }
                }
        }
}