WorldFiles region format and magic check

src/files/WorldFiles.h

@@ -15,12 +15,13 @@
 #include "../typedefs.h"
 #include "../settings.h"
 
+const uint REGION_HEADER_SIZE = 10;
 const uint REGION_LAYER_VOXELS = 0;
 const uint REGION_LAYER_LIGHTS = 1;
 const uint REGION_SIZE_BIT = 5;
 const uint REGION_SIZE = (1 << (REGION_SIZE_BIT));
 const uint REGION_CHUNKS_COUNT = ((REGION_SIZE) * (REGION_SIZE));
-const uint REGION_FORMAT_VERSION = 1;
+const uint REGION_FORMAT_VERSION = 2;
 const uint WORLD_FORMAT_VERSION = 1;
 const uint MAX_OPEN_REGION_FILES = 16;
 
@@ -52,9 +53,16 @@ public:
 	uint32_t* getSizes() const;
 };
 
+struct regfile {
+    files::rafile file;
+    int version;
+
+    regfile(std::filesystem::path filename);
+};
+
 typedef std::unordered_map<glm::ivec2, std::unique_ptr<WorldRegion>> regionsmap;
 class WorldFiles {
-    std::unordered_map<glm::ivec3, std::unique_ptr<files::rafile>> openRegFiles;
+    std::unordered_map<glm::ivec3, std::unique_ptr<regfile>> openRegFiles;
 
 	void writeWorldInfo(const World* world);
 	std::filesystem::path getLightsFolder() const;
@@ -98,8 +106,8 @@ class WorldFiles {
 				   const std::filesystem::path& folder,
 				   int x, int z, int layer);
     
-    files::rafile* getRegFile(glm::ivec3 coord,
-                              const std::filesystem::path& folder);
+    regfile* getRegFile(glm::ivec3 coord,
+                        const std::filesystem::path& folder);
 public:
     static bool parseRegionFilename(const std::string& name, int& x, int& y);
     std::filesystem::path getRegionsFolder() const;