Add support for map block version 29

include/BlockDecoder.h

@@ -1,8 +1,9 @@
 #pragma once
 
+#include <cstdint>
 #include <unordered_map>
-
 #include "types.h"
+#include <ZstdDecompressor.h>
 
 class BlockDecoder {
 public:
@@ -17,9 +18,11 @@ public:
 private:
 	typedef std::unordered_map<uint16_t, std::string> NameMap;
 	NameMap m_nameMap;
-	int m_blockAirId;
-	int m_blockIgnoreId;
+	uint16_t m_blockAirId, m_blockIgnoreId;
 
 	u8 m_version, m_contentWidth;
 	ustring m_mapData;
+
+	// one instance for performance
+	ZstdDecompressor m_zstd_decompressor;
 };

include/ZstdDecompressor.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <cstdlib>
+#include <string>
+#include "types.h"
+
+class ZstdDecompressor
+{
+public:
+	class DecompressError {};
+
+	ZstdDecompressor();
+	~ZstdDecompressor();
+	void setData(const u8 *data, size_t size, size_t seekPos);
+	size_t seekPos() const;
+	ustring decompress();
+
+private:
+	void *m_stream; // ZSTD_DStream
+	const u8 *m_data;
+	size_t m_seekPos, m_size;
+};