ZoneFile bugfix + hash_table access

- Fixed start* in ZoneFile::Read pointing to the original buffer. This could result in members pointing to the old buffer instead of the zone files own copy of the buffer. This could cause a use after free or other memory erros if pointer members were accessed after the original buffer was freed.
- Added access to the relation data hashtable. Still pretty sure the game doesn't use it for anything. Gonna add generation of export with Nanoforge soon just in case. Seems simple enough to generate.

Author: Moneyl

RfgTools++/RfgTools++/formats/zones/ZoneFile.cpp

@@ -21,14 +21,16 @@ std::optional<ZoneFile> ZoneFile::Read(const std::string& path)
 std::optional<ZoneFile> ZoneFile::Read(std::span<u8> bytes, const std::string& name)
 {
 	size_t sizeBytes = bytes.size_bytes();
-	u8* start = bytes.data();
-	u8* end = start + sizeBytes;
 
-	//Take ownership of buffer
+	//Copy bytes to internal buffer
 	ZoneFile zoneFile;
 	zoneFile.Name = name;
 	zoneFile._data = std::make_unique<u8[]>(sizeBytes);
-	memcpy(zoneFile._data.get(), start, sizeBytes);
+	memcpy(zoneFile._data.get(), bytes.data(), sizeBytes);
+
+	//Get start and end position of data
+	u8* start = zoneFile._data.get();
+	u8* end = start + sizeBytes;
 
 	//Read header
 	memcpy(&zoneFile.Header, start, sizeof(ZoneFileHeader));
@@ -38,7 +40,7 @@ std::optional<ZoneFile> ZoneFile::Read(std::span<u8> bytes, const std::string& n
 	zoneFile.HasRelationData = (zoneFile.Header.DistrictFlags & 5) == 0;
 	if (zoneFile.HasRelationData)
 	{
-		zoneFile.RelationData = pos;
+		zoneFile.RelationData = (ZoneFileRelationData*)pos;
 		pos += 87368;
 	}
 	if (zoneFile.Empty())

RfgTools++/RfgTools++/formats/zones/ZoneFile.h

@@ -19,13 +19,25 @@ class ZoneFileHeader
 };
 static_assert(sizeof(ZoneFileHeader) == 24, "sizeof(ZoneFileHeader) must be 24 to match RFG zone file format.");
 
+struct ZoneFileRelationData
+{
+    u8 Padding0[4];
+    u16 Free;
+    u16 Slot[7280];
+    u16 Next[7280];
+    u8 Padding1[2];
+    u32 Keys[7280];
+    u32 Values[7280];
+};
+static_assert(sizeof(ZoneFileRelationData) == 87368);
+
 //Zone format version 36. Found in rfgzone_pc and layer_pc files in RFG and RFGR.
 class ZoneFile
 {
 public:
     ZoneFileHeader Header;
     bool HasRelationData = false;
-    u8* RelationData = nullptr;
+    ZoneFileRelationData* RelationData = nullptr;
     //Start of the zone object list. You must use NextObject() for iteration since there's variable size property blocks between objects.
     ZoneObject* Objects = nullptr;
     u32 ObjectsSize = 0;