65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
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#include "db-leveldb.h"
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#include <stdexcept>
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#include <sstream>
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inline int64_t stoi64(const std::string &s) {
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std::stringstream tmp(s);
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long long t;
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tmp >> t;
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return t;
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}
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inline std::string i64tos(int64_t i) {
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std::ostringstream o;
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o<<i;
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return o.str();
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}
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DBLevelDB::DBLevelDB(const std::string &mapdir) {
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leveldb::Options options;
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options.create_if_missing = false;
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leveldb::Status status = leveldb::DB::Open(options, mapdir + "map.db", &m_db);
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if(!status.ok())
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throw std::runtime_error("Failed to open Database");
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}
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DBLevelDB::~DBLevelDB() {
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delete m_db;
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}
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std::vector<int64_t> DBLevelDB::getBlockPos() {
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std::vector<int64_t> vec;
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std::set<int64_t> s;
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leveldb::Iterator* it = m_db->NewIterator(leveldb::ReadOptions());
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for (it->SeekToFirst(); it->Valid(); it->Next()) {
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vec.push_back(stoi64(it->key().ToString()));
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s.insert(stoi64(it->key().ToString()));
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}
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delete it;
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m_bpcache = s;
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return vec;
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}
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DBBlockList DBLevelDB::getBlocksOnZ(int zPos)
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{
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DBBlockList blocks;
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std::string datastr;
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leveldb::Status status;
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int64_t psMin;
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int64_t psMax;
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psMin = (zPos * 16777216l) - 0x800000;
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psMax = (zPos * 16777216l) + 0x7fffff;
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for(int64_t i = psMin; i <= psMax; i++) { // FIXME: This is still very very inefficent (even with m_bpcache)
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if(m_bpcache.find(i) == m_bpcache.end())
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continue;
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status = m_db->Get(leveldb::ReadOptions(), i64tos(i), &datastr);
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if(status.ok())
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blocks.push_back( DBBlock( i, std::basic_string<unsigned char>( (const unsigned char*) datastr.c_str(), datastr.size() ) ) );
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}
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return blocks;
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}
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