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Start analyzing the chunks

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This commit is contained in:
Matthias Schiffer 2015-02-01 05:18:35 +01:00
parent 8a8a41a800
commit 8403a4e71c
4 changed files with 80 additions and 24 deletions
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50
src/World/Chunk.cpp
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@ -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();
}
}