Implement most of the chunk format

23 files changed, 1327 insertions, 1 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9d94e18..f476f23 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,4 +2,8 @@ cmake_minimum_required(VERSION 2.8.3)
 project(MINEDMAP CXX)
 
 
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(ZLIB REQUIRED zlib)
+
+
 add_subdirectory(src)
diff --git a/src/Buffer.hpp b/src/Buffer.hpp
new file mode 100644
index 0000000..9af622d
--- /dev/null
+++ b/src/Buffer.hpp
@@ -0,0 +1,63 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include <cstdint>
+#include <stdexcept>
+#include <string>
+
+
+namespace MinedMap {
+
+class Buffer {
+private:
+	const uint8_t *data;
+	size_t len;
+
+public:
+	Buffer(const uint8_t *data0, size_t len0) : data(data0), len(len0) {}
+
+	uint8_t get() {
+		if (!len)
+			throw std::runtime_error("Buffer::get(): buffer underrun");
+
+		data++;
+		len--;
+		return data[-1];
+	}
+
+	std::string getString(size_t n) {
+		if (n > len)
+			throw std::runtime_error("Buffer::get(): buffer underrun");
+
+		data += n;
+		len -= n;
+		return std::string(reinterpret_cast<const char *>(data - n), n);
+	}
+};
+
+}
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 4559a19..df50419 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,3 +1,12 @@
+include_directories(${ZLIB_INCLUDE_DIRS})
+link_directories(${ZLIB_LIBRARY_DIRS})
+
 add_executable(MinedMap
   MinedMap.cpp
+  NBT/Tag.cpp
+  World/Chunk.cpp
+  World/Region.cpp
 )
+set_target_properties(MinedMap PROPERTIES COMPILE_FLAGS "-std=c++11 -Wall ${ZLIB_CFLAGS_OTHER}")
+set_target_properties(MinedMap PROPERTIES LINK_FLAGS "${ZLIB_LDFLAGS_OTHER}")
+target_link_libraries(MinedMap ${ZLIB_LIBRARIES})
diff --git a/src/MinedMap.cpp b/src/MinedMap.cpp
index c28911a..306837d 100644
--- a/src/MinedMap.cpp
+++ b/src/MinedMap.cpp
@@ -24,6 +24,21 @@
 */
 
 
-int main() {
+#include "World/Region.hpp"
+
+#include <iostream>
+#include <unistd.h>
+
+
+int main(int argc, char *argv[]) {
+	using namespace MinedMap;
+
+	if (argc < 2) {
+		std::cerr << "Usage: " << argv[0] << " region" << std::endl;
+		return 1;
+	}
+
+	World::Region region(argv[1]);
+
 	return 0;
 }
diff --git a/src/NBT/ByteArrayTag.hpp b/src/NBT/ByteArrayTag.hpp
new file mode 100644
index 0000000..d5a6333
--- /dev/null
+++ b/src/NBT/ByteArrayTag.hpp
@@ -0,0 +1,62 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+#include <vector>
+
+
+namespace MinedMap {
+namespace NBT {
+
+class ByteArrayTag : public Tag {
+private:
+	friend class Tag;
+
+	std::vector<uint8_t> value;
+
+	ByteArrayTag(Buffer *buffer) {
+		uint32_t len = uint32_t(buffer->get()) << 24;
+		len |= uint32_t(buffer->get()) << 16;
+		len |= uint32_t(buffer->get()) << 8;
+		len |= uint32_t(buffer->get());
+
+		value.resize(len);
+
+		for (uint32_t i = 0; i < len; i++)
+			value[i] = buffer->get();
+	}
+
+public:
+	virtual Type getType() const {
+		return Type::ByteArray;
+	}
+};
+
+}
+}
diff --git a/src/NBT/ByteTag.hpp b/src/NBT/ByteTag.hpp
new file mode 100644
index 0000000..cc4aba9
--- /dev/null
+++ b/src/NBT/ByteTag.hpp
@@ -0,0 +1,56 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+
+namespace MinedMap {
+namespace NBT {
+
+class ByteTag : public Tag {
+private:
+	friend class Tag;
+
+	uint8_t value;
+
+	ByteTag(Buffer *buffer) {
+		value = buffer->get();
+	}
+
+public:
+	virtual Type getType() const {
+		return Type::Byte;
+	}
+
+	uint8_t getValue() const {
+		return value;
+	}
+};
+
+}
+}
diff --git a/src/NBT/CompoundTag.hpp b/src/NBT/CompoundTag.hpp
new file mode 100644
index 0000000..99bbd94
--- /dev/null
+++ b/src/NBT/CompoundTag.hpp
@@ -0,0 +1,61 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+#include <string>
+#include <unordered_map>
+
+
+namespace MinedMap {
+namespace NBT {
+
+class CompoundTag : public Tag {
+private:
+	friend class Tag;
+
+	std::unordered_map<std::string, std::shared_ptr<Tag>> value;
+
+	CompoundTag(Buffer *buffer) {
+		while (true) {
+			std::pair<std::string, std::shared_ptr<Tag>> v = Tag::readNamedTag(buffer);
+			if (v.second->getType() == Type::End)
+				break;
+
+			value.insert(std::move(v));
+		}
+	}
+
+public:
+	virtual Type getType() const {
+		return Type::Compound;
+	}
+};
+
+}
+}
diff --git a/src/NBT/DoubleTag.hpp b/src/NBT/DoubleTag.hpp
new file mode 100644
index 0000000..327dcf5
--- /dev/null
+++ b/src/NBT/DoubleTag.hpp
@@ -0,0 +1,59 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+
+namespace MinedMap {
+namespace NBT {
+
+class DoubleTag : public Tag {
+private:
+	friend class Tag;
+
+	DoubleTag(Buffer *buffer) {
+		uint64_t value;
+
+		value = uint64_t(buffer->get()) << 56;
+		value |= uint64_t(buffer->get()) << 48;
+		value |= uint64_t(buffer->get()) << 40;
+		value |= uint64_t(buffer->get()) << 32;
+		value |= uint64_t(buffer->get()) << 24;
+		value |= uint64_t(buffer->get()) << 16;
+		value |= uint64_t(buffer->get()) << 8;
+		value |= uint64_t(buffer->get());
+	}
+
+public:
+	virtual Type getType() const {
+		return Type::Double;
+	}
+};
+
+}
+}
diff --git a/src/NBT/EndTag.hpp b/src/NBT/EndTag.hpp
new file mode 100644
index 0000000..c969e98
--- /dev/null
+++ b/src/NBT/EndTag.hpp
@@ -0,0 +1,48 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+
+namespace MinedMap {
+namespace NBT {
+
+class EndTag : public Tag {
+private:
+	friend class Tag;
+
+	EndTag() {}
+
+public:
+	virtual Type getType() const {
+		return Type::End;
+	}
+};
+
+}
+}
diff --git a/src/NBT/FloatTag.hpp b/src/NBT/FloatTag.hpp
new file mode 100644
index 0000000..8859f94
--- /dev/null
+++ b/src/NBT/FloatTag.hpp
@@ -0,0 +1,55 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+
+namespace MinedMap {
+namespace NBT {
+
+class FloatTag : public Tag {
+private:
+	friend class Tag;
+
+	FloatTag(Buffer *buffer) {
+		uint32_t value;
+
+		value = uint32_t(buffer->get()) << 24;
+		value |= uint32_t(buffer->get()) << 16;
+		value |= uint32_t(buffer->get()) << 8;
+		value |= uint32_t(buffer->get());
+	}
+
+public:
+	virtual Type getType() const {
+		return Type::Float;
+	}
+};
+
+}
+}
diff --git a/src/NBT/IntArrayTag.hpp b/src/NBT/IntArrayTag.hpp
new file mode 100644
index 0000000..e9b0d3d
--- /dev/null
+++ b/src/NBT/IntArrayTag.hpp
@@ -0,0 +1,68 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+#include <vector>
+
+
+namespace MinedMap {
+namespace NBT {
+
+class IntArrayTag : public Tag {
+private:
+	friend class Tag;
+
+	std::vector<uint32_t> value;
+
+	IntArrayTag(Buffer *buffer) {
+		uint32_t len = uint32_t(buffer->get()) << 24;
+		len |= uint32_t(buffer->get()) << 16;
+		len |= uint32_t(buffer->get()) << 8;
+		len |= uint32_t(buffer->get());
+
+		value.resize(len);
+
+		for (uint32_t i = 0; i < len; i++) {
+			uint32_t v = uint32_t(buffer->get()) << 24;
+			v |= uint32_t(buffer->get()) << 16;
+			v |= uint32_t(buffer->get()) << 8;
+			v |= uint32_t(buffer->get());
+
+			value[i] = v;
+		}
+	}
+
+public:
+	virtual Type getType() const {
+		return Type::IntArray;
+	}
+};
+
+}
+}
diff --git a/src/NBT/IntTag.hpp b/src/NBT/IntTag.hpp
new file mode 100644
index 0000000..9e7b3db
--- /dev/null
+++ b/src/NBT/IntTag.hpp
@@ -0,0 +1,59 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+
+namespace MinedMap {
+namespace NBT {
+
+class IntTag : public Tag {
+private:
+	friend class Tag;
+
+	uint32_t value;
+
+	IntTag(Buffer *buffer) {
+		value = uint32_t(buffer->get()) << 24;
+		value |= uint32_t(buffer->get()) << 16;
+		value |= uint32_t(buffer->get()) << 8;
+		value |= uint32_t(buffer->get());
+	}
+
+public:
+	virtual Type getType() const {
+		return Type::Int;
+	}
+
+	uint32_t getValue() const {
+		return value;
+	}
+};
+
+}
+}
diff --git a/src/NBT/ListTag.hpp b/src/NBT/ListTag.hpp
new file mode 100644
index 0000000..6404065
--- /dev/null
+++ b/src/NBT/ListTag.hpp
@@ -0,0 +1,65 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+#include <vector>
+
+
+namespace MinedMap {
+namespace NBT {
+
+class ListTag : public Tag {
+private:
+	friend class Tag;
+
+	std::vector<std::shared_ptr<Tag>> value;
+
+
+	ListTag(Buffer *buffer) {
+		Type type = static_cast<Type>(buffer->get());
+
+		uint32_t len = uint32_t(buffer->get()) << 24;
+		len |= uint32_t(buffer->get()) << 16;
+		len |= uint32_t(buffer->get()) << 8;
+		len |= uint32_t(buffer->get());
+
+		value.resize(len);
+
+		for (uint32_t i = 0; i < len; i++)
+			value[i] = Tag::readTag(type, buffer);
+	}
+
+public:
+	virtual Type getType() const {
+		return Type::List;
+	}
+};
+
+}
+}
diff --git a/src/NBT/LongTag.hpp b/src/NBT/LongTag.hpp
new file mode 100644
index 0000000..6cd5f8f
--- /dev/null
+++ b/src/NBT/LongTag.hpp
@@ -0,0 +1,63 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+
+namespace MinedMap {
+namespace NBT {
+
+class LongTag : public Tag {
+private:
+	friend class Tag;
+
+	uint64_t value;
+
+	LongTag(Buffer *buffer) {
+		value = uint64_t(buffer->get()) << 56;
+		value |= uint64_t(buffer->get()) << 48;
+		value |= uint64_t(buffer->get()) << 40;
+		value |= uint64_t(buffer->get()) << 32;
+		value |= uint64_t(buffer->get()) << 24;
+		value |= uint64_t(buffer->get()) << 16;
+		value |= uint64_t(buffer->get()) << 8;
+		value |= uint64_t(buffer->get());
+	}
+
+public:
+	virtual Type getType() const {
+		return Type::Long;
+	}
+
+	uint64_t getValue() const {
+		return value;
+	}
+};
+
+}
+}
diff --git a/src/NBT/ShortTag.hpp b/src/NBT/ShortTag.hpp
new file mode 100644
index 0000000..a44ca9b
--- /dev/null
+++ b/src/NBT/ShortTag.hpp
@@ -0,0 +1,57 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+
+namespace MinedMap {
+namespace NBT {
+
+class ShortTag : public Tag {
+private:
+	friend class Tag;
+
+	uint16_t value;
+
+	ShortTag(Buffer *buffer) {
+		value = buffer->get() << 8;
+		value |= buffer->get();
+	}
+
+public:
+	virtual Type getType() const {
+		return Type::Short;
+	}
+
+	uint16_t getValue() const {
+		return value;
+	}
+};
+
+}
+}
diff --git a/src/NBT/StringTag.hpp b/src/NBT/StringTag.hpp
new file mode 100644
index 0000000..a120183
--- /dev/null
+++ b/src/NBT/StringTag.hpp
@@ -0,0 +1,55 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Tag.hpp"
+
+
+namespace MinedMap {
+namespace NBT {
+
+class StringTag : public Tag {
+private:
+	friend class Tag;
+
+	std::string value;
+
+	StringTag(Buffer *buffer) {
+		uint16_t len = buffer->get() << 8;
+		len |= buffer->get();
+
+		value = buffer->getString(len);
+	}
+
+public:
+	virtual Type getType() const {
+		return Type::String;
+	}
+};
+
+}
+}
diff --git a/src/NBT/Tag.cpp b/src/NBT/Tag.cpp
new file mode 100644
index 0000000..fddfc4e
--- /dev/null
+++ b/src/NBT/Tag.cpp
@@ -0,0 +1,105 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include "Tag.hpp"
+
+#include "EndTag.hpp"
+#include "ByteTag.hpp"
+#include "ShortTag.hpp"
+#include "IntTag.hpp"
+#include "LongTag.hpp"
+#include "FloatTag.hpp"
+#include "DoubleTag.hpp"
+#include "ByteArrayTag.hpp"
+#include "StringTag.hpp"
+#include "ListTag.hpp"
+#include "CompoundTag.hpp"
+#include "IntArrayTag.hpp"
+
+
+#include <stdexcept>
+
+
+namespace MinedMap {
+namespace NBT {
+
+std::shared_ptr<Tag> Tag::readTag(Type type, Buffer *buffer) {
+	switch (type) {
+	case Type::End:
+		return std::shared_ptr<EndTag>(new EndTag());
+
+	case Type::Byte:
+		return std::shared_ptr<ByteTag>(new ByteTag(buffer));
+
+	case Type::Short:
+		return std::shared_ptr<ShortTag>(new ShortTag(buffer));
+
+	case Type::Int:
+		return std::shared_ptr<IntTag>(new IntTag(buffer));
+
+	case Type::Long:
+		return std::shared_ptr<LongTag>(new LongTag(buffer));
+
+	case Type::Float:
+		return std::shared_ptr<FloatTag>(new FloatTag(buffer));
+
+	case Type::Double:
+		return std::shared_ptr<DoubleTag>(new DoubleTag(buffer));
+
+	case Type::ByteArray:
+		return std::shared_ptr<ByteArrayTag>(new ByteArrayTag(buffer));
+
+	case Type::String:
+		return std::shared_ptr<StringTag>(new StringTag(buffer));
+
+	case Type::List:
+		return std::shared_ptr<ListTag>(new ListTag(buffer));
+
+	case Type::Compound:
+		return std::shared_ptr<CompoundTag>(new CompoundTag(buffer));
+
+	case Type::IntArray:
+		return std::shared_ptr<IntArrayTag>(new IntArrayTag(buffer));
+
+	default:
+		throw std::runtime_error("Tag::read: unknown tag type");
+	}
+}
+
+std::pair<std::string, std::shared_ptr<Tag>> Tag::readNamedTag(Buffer *buffer) {
+	Type type = static_cast<Type>(buffer->get());
+	if (type == Type::End)
+		return std::make_pair("", std::shared_ptr<EndTag>(new EndTag()));
+
+	uint16_t len = buffer->get() << 8;
+	len |= buffer->get();
+	std::string name = buffer->getString(len);
+
+	return std::make_pair(name, readTag(type, buffer));
+}
+
+}
+}
diff --git a/src/NBT/Tag.hpp b/src/NBT/Tag.hpp
new file mode 100644
index 0000000..0d25299
--- /dev/null
+++ b/src/NBT/Tag.hpp
@@ -0,0 +1,65 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include <cstdint>
+#include <memory>
+
+#include "../Buffer.hpp"
+
+
+namespace MinedMap {
+namespace NBT {
+
+class Tag {
+public:
+	enum class Type {
+		End = 0,
+		Byte = 1,
+		Short = 2,
+		Int = 3,
+		Long = 4,
+		Float = 5,
+		Double = 6,
+		ByteArray = 7,
+		String = 8,
+		List = 9,
+		Compound = 10,
+		IntArray = 11,
+	};
+
+	static std::shared_ptr<Tag> readTag(Type type, Buffer *buffer);
+
+	static std::pair<std::string, std::shared_ptr<Tag>> readNamedTag(Buffer *buffer);
+
+	virtual Type getType() const = 0;
+
+	virtual ~Tag() {}
+};
+
+}
+}
diff --git a/src/UniqueCPtr.hpp b/src/UniqueCPtr.hpp
new file mode 100644
index 0000000..9e70b89
--- /dev/null
+++ b/src/UniqueCPtr.hpp
@@ -0,0 +1,37 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include <cstdlib>
+#include <memory>
+
+
+template<typename T> class UniqueCPtr : public std::unique_ptr<T, void (*)(void *)> {
+public:
+	UniqueCPtr() : std::unique_ptr<T, void (*)(void *)>(nullptr, std::free) {}
+	template<typename T2> UniqueCPtr(T2 ptr) : std::unique_ptr<T, void (*)(void *)>(ptr, std::free) {}
+};
diff --git a/src/World/Chunk.cpp b/src/World/Chunk.cpp
new file mode 100644
index 0000000..ccd0d87
--- /dev/null
+++ b/src/World/Chunk.cpp
@@ -0,0 +1,101 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include "Chunk.hpp"
+
+#include <iostream>
+#include <stdexcept>
+#include <cstdlib>
+
+#include <zlib.h>
+
+
+namespace MinedMap {
+namespace World {
+
+std::tuple<UniqueCPtr<uint8_t[]>, size_t> Chunk::inflateChunk(uint8_t *data, size_t len) {
+	size_t outlen = 0;
+	uint8_t *output = nullptr;
+
+	z_stream stream = {};
+	int ret = inflateInit(&stream);
+	if (ret != Z_OK)
+		throw std::runtime_error("inflateInit() failed");
+
+	stream.next_in = data;
+	stream.avail_in = len;
+
+	while (stream.avail_in) {
+		outlen += 65536;
+		output = static_cast<uint8_t *>(std::realloc(output, outlen));
+
+		stream.next_out = output + stream.total_out;
+		stream.avail_out = outlen - stream.total_out;
+
+		ret = inflate(&stream, Z_NO_FLUSH);
+		switch (ret) {
+		case Z_NEED_DICT:
+		case Z_DATA_ERROR:
+		case Z_MEM_ERROR:
+			inflateEnd(&stream);
+			throw std::runtime_error("inflate() failed");
+		}
+	}
+
+	inflateEnd(&stream);
+
+	return std::make_tuple(UniqueCPtr<uint8_t[]>(output), stream.total_out);
+}
+
+Chunk::Chunk(uint8_t *buffer, size_t buflen) {
+	if (buflen < 5)
+		throw std::invalid_argument("short chunk");
+
+	size_t size = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | buffer[3];
+	if (size < 1 || size > (buflen - 4))
+		throw std::invalid_argument("invalid chunk size");
+
+	uint8_t format = buffer[4];
+	if (format != 2)
+		throw std::invalid_argument("unknown chunk format");
+
+	UniqueCPtr<uint8_t[]> data;
+	size_t len;
+	std::tie(data, len) = inflateChunk(buffer+5, size-1);
+
+	std::cerr << "Chunk has size " << size << " (" << len << " inflated)" << std::endl;
+
+	Buffer nbt(data.get(), len);
+
+	std::pair<std::string, std::shared_ptr<NBT::Tag>> tag = NBT::Tag::readNamedTag(&nbt);
+	if (tag.first != "")
+		throw std::invalid_argument("non-empty root tag");
+
+	content = std::move(tag.second);
+}
+
+}
+}
diff --git a/src/World/Chunk.hpp b/src/World/Chunk.hpp
new file mode 100644
index 0000000..eba4626
--- /dev/null
+++ b/src/World/Chunk.hpp
@@ -0,0 +1,54 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+
+#include "../UniqueCPtr.hpp"
+#include "../NBT/Tag.hpp"
+
+#include <cstdint>
+#include <tuple>
+
+
+namespace MinedMap {
+namespace World {
+
+class Chunk {
+public:
+	static const size_t SIZE = 16;
+
+private:
+	static std::tuple<UniqueCPtr<uint8_t[]>, size_t> inflateChunk(uint8_t *data, size_t len);
+
+	std::shared_ptr<NBT::Tag> content;
+
+public:
+	Chunk(uint8_t *buffer, size_t buflen);
+};
+
+}
+}
diff --git a/src/World/Region.cpp b/src/World/Region.cpp
new file mode 100644
index 0000000..4c435f7
--- /dev/null
+++ b/src/World/Region.cpp
@@ -0,0 +1,101 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include "Region.hpp"
+
+#include <fstream>
+#include <iostream>
+
+
+namespace MinedMap {
+namespace World {
+
+Region::ChunkMap Region::processHeader(const uint8_t header[4096]) {
+	ChunkMap map;
+
+	for (size_t z = 0; z < 32; z++) {
+		for (size_t x = 0; x < 32; x++) {
+			const uint8_t *p = &header[128*z + x*4];
+
+			size_t offset = (p[0] << 16) | (p[1] << 8) | p[2];
+
+			if (!offset)
+				continue;
+
+			size_t len = p[3];
+
+			map.emplace(offset, ChunkDesc(x, z, len));
+		}
+	}
+
+	return map;
+}
+
+Region::Region(const char *filename) {
+	std::ifstream file;
+	file.exceptions(std::ios::failbit | std::ios::badbit);
+	file.open(filename, std::ios::in | std::ios::binary);
+
+	ChunkMap chunkMap;
+
+	{
+		uint8_t header[4096];
+		file.read((char *)header, sizeof(header));
+
+		chunkMap = processHeader(header);
+	}
+
+	size_t i = 1, c = 0;
+	while (!file.eof()) {
+		auto it = chunkMap.find(i);
+		if (it == chunkMap.end()) {
+			file.ignore(4096);
+			i++;
+			continue;
+		}
+
+		size_t x, z, len;
+		std::tie(x, z, len) = it->second;
+
+		if (chunks[x][z])
+			throw std::invalid_argument("duplicate chunk");
+
+		uint8_t buffer[len * 4096];
+		file.read((char *)buffer, len * 4096);
+
+		chunks[x][z].reset(new Chunk(buffer, len * 4096));
+
+		std::cerr << "Read chunk (" << x << "," << z << ") of length " << len << std::endl;
+
+		i += len;
+		c++;
+	}
+
+	std::cerr << "Read " << c <<" of " << chunkMap.size() << " chunks" << std::endl;
+}
+
+}
+}
diff --git a/src/World/Region.hpp b/src/World/Region.hpp
new file mode 100644
index 0000000..0843724
--- /dev/null
+++ b/src/World/Region.hpp
@@ -0,0 +1,64 @@
+/*
+  Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#pragma once
+
+#include "Chunk.hpp"
+
+#include <memory>
+#include <stdexcept>
+#include <tuple>
+#include <unordered_map>
+
+
+namespace MinedMap {
+namespace World {
+
+class Region {
+public:
+	static const size_t SIZE = 32;
+
+private:
+	typedef std::tuple<size_t, size_t, size_t> ChunkDesc;
+	typedef std::unordered_map<size_t, ChunkDesc> ChunkMap;
+
+	std::unique_ptr<Chunk> chunks[SIZE][SIZE];
+
+	static ChunkMap processHeader(const uint8_t header[4096]);
+
+public:
+	Region(const char *filename);
+
+	const Chunk * operator()(size_t x, size_t z) {
+		if (x >= SIZE || z >= SIZE)
+			throw std::range_error("Region(): bad coordinates");
+
+		return chunks[x][z].get();
+	}
+};
+
+}
+}