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authorMatthias Schiffer <mschiffer@universe-factory.net>2015-02-01 05:18:35 +0100
committerMatthias Schiffer <mschiffer@universe-factory.net>2015-02-01 05:18:35 +0100
commit8403a4e71c1c3557646c9f0d019bc53e014134a0 (patch)
treecba4b422d46ab0012a7c920b74c26663baf01040 /src/World
parent8a8a41a800dfe9bdcab934d6b53d9c6defd4a457 (diff)
downloadMinedMap-8403a4e71c1c3557646c9f0d019bc53e014134a0.tar
MinedMap-8403a4e71c1c3557646c9f0d019bc53e014134a0.zip
Start analyzing the chunks
Diffstat (limited to 'src/World')
-rw-r--r--src/World/Chunk.cpp50
-rw-r--r--src/World/Chunk.hpp7
-rw-r--r--src/World/Region.cpp5
3 files changed, 38 insertions, 24 deletions
diff --git a/src/World/Chunk.cpp b/src/World/Chunk.cpp
index db286ee..90ad21f 100644
--- a/src/World/Chunk.cpp
+++ b/src/World/Chunk.cpp
@@ -25,6 +25,8 @@
#include "Chunk.hpp"
+#include "../Util.hpp"
+#include "../NBT/ByteTag.hpp"
#include <iostream>
#include <stdexcept>
@@ -36,7 +38,7 @@
namespace MinedMap {
namespace World {
-std::pair<UniqueCPtr<uint8_t[]>, size_t> Chunk::inflateChunk(uint8_t *data, size_t len) {
+void Chunk::inflateChunk(uint8_t *buffer, size_t buflen) {
size_t outlen = 0;
uint8_t *output = nullptr;
@@ -45,8 +47,8 @@ std::pair<UniqueCPtr<uint8_t[]>, size_t> Chunk::inflateChunk(uint8_t *data, size
if (ret != Z_OK)
throw std::runtime_error("inflateInit() failed");
- stream.next_in = data;
- stream.avail_in = len;
+ stream.next_in = buffer;
+ stream.avail_in = buflen;
while (stream.avail_in) {
outlen += 65536;
@@ -67,7 +69,28 @@ std::pair<UniqueCPtr<uint8_t[]>, size_t> Chunk::inflateChunk(uint8_t *data, size
inflateEnd(&stream);
- return std::make_pair(UniqueCPtr<uint8_t[]>(output), stream.total_out);
+ len = stream.total_out;
+ data = UniqueCPtr<uint8_t[]>(output);
+}
+
+void Chunk::parseChunk() {
+ Buffer nbt(data.get(), len);
+ std::pair<std::string, std::shared_ptr<const NBT::Tag>> tag = NBT::Tag::readNamedTag(&nbt);
+
+ std::shared_ptr<const NBT::CompoundTag>::operator=(std::dynamic_pointer_cast<const NBT::CompoundTag>(tag.second));
+
+ if (!(*this) || tag.first != "")
+ throw std::invalid_argument("invalid root tag");
+
+ sections = (*this)->get<const NBT::ListTag<NBT::CompoundTag>>("Level", "Sections");
+ if (!sections)
+ throw std::invalid_argument("no sections found");
+}
+
+void Chunk::analyzeChunk() {
+ maxY = (assertValue(sections->back()->get<NBT::ByteTag>("Y"))->getValue() + 1) * SIZE;
+
+ std::cerr << "maxY: " << maxY << std::endl;
}
Chunk::Chunk(uint8_t *buffer, size_t buflen) {
@@ -82,22 +105,9 @@ Chunk::Chunk(uint8_t *buffer, size_t buflen) {
if (format != 2)
throw std::invalid_argument("unknown chunk format");
- 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<const NBT::Tag>> tag = NBT::Tag::readNamedTag(&nbt);
-
- std::shared_ptr<const NBT::CompoundTag>::operator=(std::dynamic_pointer_cast<const NBT::CompoundTag>(tag.second));
-
- if (!(*this) || tag.first != "")
- throw std::invalid_argument("invalid root tag");
-
- sections = (*this)->get<const NBT::ListTag<NBT::CompoundTag>>("Level", "Sections");
- if (!sections)
- throw std::invalid_argument("no sections found");
+ inflateChunk(buffer+5, size-1);
+ parseChunk();
+ analyzeChunk();
}
}
diff --git a/src/World/Chunk.hpp b/src/World/Chunk.hpp
index 5b0ecdb..639d1a7 100644
--- a/src/World/Chunk.hpp
+++ b/src/World/Chunk.hpp
@@ -43,9 +43,14 @@ public:
static const size_t SIZE = 16;
private:
+ size_t len;
UniqueCPtr<uint8_t[]> data;
- static std::pair<UniqueCPtr<uint8_t[]>, size_t> inflateChunk(uint8_t *data, size_t len);
+ unsigned maxY;
+
+ void inflateChunk(uint8_t *data, size_t len);
+ void parseChunk();
+ void analyzeChunk();
std::shared_ptr<const NBT::ListTag<NBT::CompoundTag>> sections;
diff --git a/src/World/Region.cpp b/src/World/Region.cpp
index 4c435f7..4f69059 100644
--- a/src/World/Region.cpp
+++ b/src/World/Region.cpp
@@ -88,13 +88,12 @@ Region::Region(const char *filename) {
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;
+ if (c != chunkMap.size())
+ throw std::invalid_argument("region incomplete");
}
}