Merged 2 branches because they relied on each other.

This one contains these changes from main c55:
* Adds a function to check if there is room for a specific item
* Using that, you can now pick up rats if you have a full inventory and a not full rat stack
* Furnace would cook only 1 item if that item used the last available result slot, now it will continue
* Furnace will say it's overloaded
* Furnace won't wait until the next step to start on the next item
 - This caused small fuels to cook slower than meant to
 - Also caused furnaces to say they were out of fuel after finishing the last fuel item

src/content_nodemeta.cpp

@@ -182,16 +182,24 @@ std::string FurnaceNodeMetadata::infoText()
  assert(src_list);
  const InventoryItem *src_item = src_list->getItem(0);
 
- if(src_item)
+ if(src_item) {
+ InventoryList *dst_list = m_inventory->getList("dst");
+ if(!dst_list->roomForCookedItem(src_item))
+ return "Furnace is overloaded";
  return "Furnace is out of fuel";
+ }
  else
  return "Furnace is inactive";
  }
  else
  {
- std::string s = "Furnace is active (";
- s += itos(m_fuel_time/m_fuel_totaltime*100);
- s += "%)";
+ std::string s = "Furnace is active";
+ // Do this so it doesn't always show (0%) for weak fuel
+ if(m_fuel_totaltime > 3) {
+ s += " (";
+ s += itos(m_fuel_time/m_fuel_totaltime*100);
+ s += "%)";
+ }
  return s;
  }
 }
@@ -221,9 +229,14 @@ bool FurnaceNodeMetadata::step(float dtime)
  assert(src_list);
  const InventoryItem *src_item = src_list->getItem(0);
 
+ bool room_available = false;
+
+ if(src_item && src_item->isCookable())
+ room_available = dst_list->roomForCookedItem(src_item);
+
  // Start only if there are free slots in dst, so that it can
  // accomodate any result item
- if(dst_list->getFreeSlots() > 0 && src_item && src_item->isCookable())
+ if(room_available)
  {
  m_src_totaltime = 3;
  }
@@ -252,13 +265,18 @@ bool FurnaceNodeMetadata::step(float dtime)
  m_src_totaltime = 0;
  }
  changed = true;
- continue;
+
+ // Fall through if the fuel item was used up this step
+ if(m_fuel_time < m_fuel_totaltime)
+ continue;
  }
 
  /*
- If there is no source item or source item is not cookable, stop loop.
+ If there is no source item or source item is not cookable,
+ or furnace became overloaded, stop loop.
  */
- if(src_item == NULL || m_src_totaltime < 0.001)
+ if((m_fuel_time < m_fuel_totaltime || dst_list->roomForCookedItem(src_item) == false)
+ && (src_item == NULL || m_src_totaltime < 0.001))
  {
  m_step_accumulator = 0;
  break;

src/inventory.cpp

@@ -549,7 +549,7 @@ InventoryItem * InventoryList::addItem(u32 i, InventoryItem *newitem)
  }
 }
 
-bool InventoryList::itemFits(u32 i, InventoryItem *newitem)
+bool InventoryList::itemFits(const u32 i, const InventoryItem *newitem)
 {
  // If it is an empty position, it's an easy job.
  const InventoryItem *to_item = getItem(i);
@@ -558,11 +558,11 @@ bool InventoryList::itemFits(u32 i, InventoryItem *newitem)
  return true;
  }
 
- // If not addable, return the item
+ // If not addable, fail
  if(newitem->addableTo(to_item) == false)
  return false;
 
- // If the item fits fully in the slot, add counter and delete it
+ // If the item fits fully in the slot, pass
  if(newitem->getCount() <= to_item->freeSpace())
  {
  return true;
@@ -571,6 +571,24 @@ bool InventoryList::itemFits(u32 i, InventoryItem *newitem)
  return false;
 }
 
+bool InventoryList::roomForItem(const InventoryItem *item)
+{
+ for(u32 i=0; i<m_items.size(); i++)
+ if(itemFits(i, item))
+ return true;
+ return false;
+}
+
+bool InventoryList::roomForCookedItem(const InventoryItem *item)
+{
+ const InventoryItem *cook = item->createCookResult();
+ if(!cook)
+ return false;
+ bool room = roomForItem(cook);
+ delete cook;
+ return room;
+}
+
 InventoryItem * InventoryList::takeItem(u32 i, u32 count)
 {
  if(count == 0)

src/inventory.h

@@ -490,7 +490,13 @@ class InventoryList
  InventoryItem * addItem(u32 i, InventoryItem *newitem);
 
  // Checks whether the item could be added to the given slot
- bool itemFits(u32 i, InventoryItem *newitem);
+ bool itemFits(const u32 i, const InventoryItem *newitem);
+
+ // Checks whether there is room for a given item
+ bool roomForItem(const InventoryItem *item);
+
+ // Checks whether there is room for a given item aftr it has been cooked
+ bool roomForCookedItem(const InventoryItem *item);
 
  // Takes some items from a slot.
  // If there are not enough, takes as many as it can.

src/server.cpp

@@ -2446,7 +2446,7 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
  if(g_settings.getBool("creative_mode") == false)
  {
  // Skip if inventory has no free space
- if(ilist->getUsedSlots() == ilist->getSize())
+ if(ilist->roomForItem(item) == false)
  {
  dout_server<<"Player inventory has no free space"<<std::endl;
  return;