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Fix old 1.7 worlds with broken ID mappings

This commit is contained in:
Player 2014-03-30 17:17:54 +02:00
parent 939a095896
commit d392ddf3be
2 changed files with 80 additions and 0 deletions
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8
fml/src/main/java/cpw/mods/fml/common/FMLContainer.java
View File

@ -216,6 +216,14 @@ public class FMLContainer extends DummyModContainer implements WorldAccessContai
NBTTagCompound dataTag = list.func_150305_b(i);
dataList.put(dataTag.func_74779_i("K"), dataTag.func_74762_e("V"));
}
if (!tag.func_74764_b("BlockedItemIds")) // no blocked id info -> old 1.7 save
{
// old 1.7 save potentially affected by the registry mapping bug
// fix the ids the best we can...
GameData.fixBrokenIds(dataList);
}
// blocked ids
int[] blockedIds = tag.func_74759_k("BlockedItemIds");
// block aliases

72
fml/src/main/java/cpw/mods/fml/common/registry/GameData.java
View File

@ -218,6 +218,78 @@ public class GameData {
return ui;
}
/**
* Fix IDs improperly allocated by early versions of the registry, best-effort.
*
* Items sharing the same ID with a block, but not sharing the same registry name will be
* mapped to an unused id. Losing items instead of blocks should minimize the damage.
*
* @param dataList List containing the IDs to fix
*/
public static void fixBrokenIds(Map<String, Integer> dataList)
{
BitSet availabilityMap = new BitSet(32000);
// reserve all ids occupied by blocks
for (Entry<String, Integer> entry : dataList.entrySet())
{
String itemName = entry.getKey();
if (itemName.charAt(0) == '\u0001') // is a block
{
availabilityMap.set(entry.getValue());
}
}
Set<String> itemsToAllocate = new HashSet<String>();
// check all ids occupied by items
for (Entry<String, Integer> entry : dataList.entrySet())
{
String itemName = entry.getKey();
if (itemName.charAt(0) != '\u0001') // is an item
{
int oldId = entry.getValue();
if (availabilityMap.get(oldId)) // id is already occupied
{
String realName = itemName.substring(1);
String blockName = '\u0001' + realName;
if (!dataList.containsKey(blockName) ||
!(getMain().iItemRegistry.getRaw(realName) instanceof ItemBlock)) // the slot is occupied by something else and this item is no ItemBlock
{
// relocate the item later, after all correct ids have been claimed
itemsToAllocate.add(itemName);
}
else if (dataList.get(blockName) != oldId) // occupied, but this is an ItemBlock for a different block than whatever may use its id
{
// relocate to the matching block
int newId = dataList.get(blockName);
entry.setValue(newId);
FMLLog.warning("Fixed ItemBlock %s not using the id of its block, old id %d, new id %d.", realName, oldId, newId);
}
}
else // unused id, occupy
{
availabilityMap.set(oldId);
}
}
}
for (String itemName : itemsToAllocate)
{
int oldId = dataList.get(itemName);
int newId = availabilityMap.nextClearBit(4096);
dataList.put(itemName, newId);
FMLLog.warning("Fixed Item %s conflicting with another block/item, old id %d, new id %d.", itemName.substring(1), oldId, newId);
}
}
public static List<String> injectWorldIDMap(Map<String, Integer> dataList, boolean injectFrozenData, boolean isLocalWorld)
{
return injectWorldIDMap(dataList, new int[0], new HashMap<String, String>(), new HashMap<String, String>(), injectFrozenData, isLocalWorld);