9a9b83e638
Currently, this is only relevant when using LevelDB, and a newer version of libstdc++, which uses a different C++ ABI which clang does not yet support. A symptom of the problem are unexpected linking failures, caused by undefined symbols, while other symbols from the same library do not cause errors. The solution is a workaround, that avoids using the offending symbols, at the cost of reduced functionality. As this currently only affects the text of an error message, the impact is minor.
117 lines
3.0 KiB
C++
117 lines
3.0 KiB
C++
#include "db-leveldb.h"
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#include <stdexcept>
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#include <sstream>
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#include "build_config.h"
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#include "types.h"
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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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m_blocksReadCount(0),
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m_blocksQueriedCount(0),
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m_keyFormatI64Usage(0),
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m_keyFormatAXYZUsage(0)
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{
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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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#if CPP_ABI_STDSTRING_OK
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throw std::runtime_error(std::string("Failed to open Database: ") + status.ToString());
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#else
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throw std::runtime_error(std::string("Failed to open Database: ") +
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( status.ok() ? "Ok (??? how is this possible ???"")" // "" is needed to prevent interpretation as trigraph -shudder-
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: status.IsNotFound() ? "NotFound"
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: status.IsCorruption() ? "Corruption"
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: status.IsIOError() ? "IOError"
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: "Cannot determine error type - could be NotSupported or InvalidArgument or something else"));
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#endif
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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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int DBLevelDB::getBlocksReadCount(void)
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{
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return m_blocksReadCount;
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}
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int DBLevelDB::getBlocksQueriedCount(void)
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{
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return m_blocksQueriedCount;
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}
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const DB::BlockPosList &DBLevelDB::getBlockPosList() {
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m_blockPosList.clear();
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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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m_blockPosList.push_back(BlockPos(it->key().ToString()));
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}
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delete it;
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return m_blockPosList;
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}
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DB::Block DBLevelDB::getBlockOnPos(const BlockPos &pos)
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{
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std::string datastr;
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leveldb::Status status;
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// If block format is not known, try both alternatives, but prefer
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// the version that has worked best in recent history
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if (pos.databaseFormat() == BlockPos::Unknown) {
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BlockPos::StrFormat format[2];
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if (m_keyFormatI64Usage > m_keyFormatAXYZUsage) {
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format[0] = BlockPos::I64;
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format[1] = BlockPos::AXYZ;
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}
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else {
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format[0] = BlockPos::AXYZ;
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format[1] = BlockPos::I64;
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}
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int i;
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for (i = 0; i < 2; i++) {
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m_blocksQueriedCount++;
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status = m_db->Get(leveldb::ReadOptions(), pos.databasePosStrFmt(format[i]), &datastr);
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if (status.ok())
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break;
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}
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if (i < 2) {
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if (format[i] == BlockPos::I64) {
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m_keyFormatI64Usage = (m_keyFormatI64Usage << 1) | 0x01;
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m_keyFormatAXYZUsage = (m_keyFormatAXYZUsage >> 1);
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}
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else {
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m_keyFormatAXYZUsage = (m_keyFormatAXYZUsage << 1) | 0x01;
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m_keyFormatI64Usage = (m_keyFormatI64Usage >> 1);
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}
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}
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}
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else {
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m_blocksQueriedCount++;
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status = m_db->Get(leveldb::ReadOptions(), pos.databasePosStr(), &datastr);
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}
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if(status.ok()) {
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m_blocksReadCount++;
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return Block(pos, ustring(reinterpret_cast<const unsigned char *>(datastr.c_str()), datastr.size()));
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}
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else {
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return Block(pos, ustring(reinterpret_cast<const unsigned char *>("")));
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}
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}
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