1 files changed, 101 insertions, 0 deletions
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;
+}
+
+}
+}