diff options
Diffstat (limited to 'src/dbwrapper.h')
| -rw-r--r-- | src/dbwrapper.h | 76 |
1 files changed, 41 insertions, 35 deletions
diff --git a/src/dbwrapper.h b/src/dbwrapper.h index 1d31ab8ae5..47bdb31b5b 100644 --- a/src/dbwrapper.h +++ b/src/dbwrapper.h @@ -1,4 +1,4 @@ -// Copyright (c) 2012-2014 The Bitcoin Core developers +// Copyright (c) 2012-2015 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. @@ -23,7 +23,23 @@ public: dbwrapper_error(const std::string& msg) : std::runtime_error(msg) {} }; -void HandleError(const leveldb::Status& status) throw(dbwrapper_error); +class CDBWrapper; + +/** These should be considered an implementation detail of the specific database. + */ +namespace dbwrapper_private { + +/** Handle database error by throwing dbwrapper_error exception. + */ +void HandleError(const leveldb::Status& status); + +/** Work around circular dependency, as well as for testing in dbwrapper_tests. + * Database obfuscation should be considered an implementation detail of the + * specific database. + */ +const std::vector<unsigned char>& GetObfuscateKey(const CDBWrapper &w); + +}; /** Batch of changes queued to be written to a CDBWrapper */ class CDBBatch @@ -31,14 +47,14 @@ class CDBBatch friend class CDBWrapper; private: + const CDBWrapper &parent; leveldb::WriteBatch batch; - const std::vector<unsigned char> *obfuscate_key; public: /** - * @param[in] obfuscate_key If passed, XOR data with this key. + * @param[in] _parent CDBWrapper that this batch is to be submitted to */ - CDBBatch(const std::vector<unsigned char> *obfuscate_key) : obfuscate_key(obfuscate_key) { }; + CDBBatch(const CDBWrapper &_parent) : parent(_parent) { }; template <typename K, typename V> void Write(const K& key, const V& value) @@ -51,7 +67,7 @@ public: CDataStream ssValue(SER_DISK, CLIENT_VERSION); ssValue.reserve(ssValue.GetSerializeSize(value)); ssValue << value; - ssValue.Xor(*obfuscate_key); + ssValue.Xor(dbwrapper_private::GetObfuscateKey(parent)); leveldb::Slice slValue(&ssValue[0], ssValue.size()); batch.Put(slKey, slValue); @@ -72,17 +88,17 @@ public: class CDBIterator { private: + const CDBWrapper &parent; leveldb::Iterator *piter; - const std::vector<unsigned char> *obfuscate_key; public: /** - * @param[in] piterIn The original leveldb iterator. - * @param[in] obfuscate_key If passed, XOR data with this key. + * @param[in] _parent Parent CDBWrapper instance. + * @param[in] _piter The original leveldb iterator. */ - CDBIterator(leveldb::Iterator *piterIn, const std::vector<unsigned char>* obfuscate_key) : - piter(piterIn), obfuscate_key(obfuscate_key) { }; + CDBIterator(const CDBWrapper &_parent, leveldb::Iterator *_piter) : + parent(_parent), piter(_piter) { }; ~CDBIterator(); bool Valid(); @@ -118,7 +134,7 @@ public: leveldb::Slice slValue = piter->value(); try { CDataStream ssValue(slValue.data(), slValue.data() + slValue.size(), SER_DISK, CLIENT_VERSION); - ssValue.Xor(*obfuscate_key); + ssValue.Xor(dbwrapper_private::GetObfuscateKey(parent)); ssValue >> value; } catch (const std::exception&) { return false; @@ -134,6 +150,7 @@ public: class CDBWrapper { + friend const std::vector<unsigned char>& dbwrapper_private::GetObfuscateKey(const CDBWrapper &w); private: //! custom environment this database is using (may be NULL in case of default environment) leveldb::Env* penv; @@ -180,7 +197,7 @@ public: ~CDBWrapper(); template <typename K, typename V> - bool Read(const K& key, V& value) const throw(dbwrapper_error) + bool Read(const K& key, V& value) const { CDataStream ssKey(SER_DISK, CLIENT_VERSION); ssKey.reserve(ssKey.GetSerializeSize(key)); @@ -193,7 +210,7 @@ public: if (status.IsNotFound()) return false; LogPrintf("LevelDB read failure: %s\n", status.ToString()); - HandleError(status); + dbwrapper_private::HandleError(status); } try { CDataStream ssValue(strValue.data(), strValue.data() + strValue.size(), SER_DISK, CLIENT_VERSION); @@ -206,15 +223,15 @@ public: } template <typename K, typename V> - bool Write(const K& key, const V& value, bool fSync = false) throw(dbwrapper_error) + bool Write(const K& key, const V& value, bool fSync = false) { - CDBBatch batch(&obfuscate_key); + CDBBatch batch(*this); batch.Write(key, value); return WriteBatch(batch, fSync); } template <typename K> - bool Exists(const K& key) const throw(dbwrapper_error) + bool Exists(const K& key) const { CDataStream ssKey(SER_DISK, CLIENT_VERSION); ssKey.reserve(ssKey.GetSerializeSize(key)); @@ -227,20 +244,20 @@ public: if (status.IsNotFound()) return false; LogPrintf("LevelDB read failure: %s\n", status.ToString()); - HandleError(status); + dbwrapper_private::HandleError(status); } return true; } template <typename K> - bool Erase(const K& key, bool fSync = false) throw(dbwrapper_error) + bool Erase(const K& key, bool fSync = false) { - CDBBatch batch(&obfuscate_key); + CDBBatch batch(*this); batch.Erase(key); return WriteBatch(batch, fSync); } - bool WriteBatch(CDBBatch& batch, bool fSync = false) throw(dbwrapper_error); + bool WriteBatch(CDBBatch& batch, bool fSync = false); // not available for LevelDB; provide for compatibility with BDB bool Flush() @@ -248,32 +265,21 @@ public: return true; } - bool Sync() throw(dbwrapper_error) + bool Sync() { - CDBBatch batch(&obfuscate_key); + CDBBatch batch(*this); return WriteBatch(batch, true); } CDBIterator *NewIterator() { - return new CDBIterator(pdb->NewIterator(iteroptions), &obfuscate_key); + return new CDBIterator(*this, pdb->NewIterator(iteroptions)); } /** * Return true if the database managed by this class contains no entries. */ bool IsEmpty(); - - /** - * Accessor for obfuscate_key. - */ - const std::vector<unsigned char>& GetObfuscateKey() const; - - /** - * Return the obfuscate_key as a hex-formatted string. - */ - std::string GetObfuscateKeyHex() const; - }; #endif // BITCOIN_DBWRAPPER_H |