lix/src/db.hh

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#ifndef __DB_H
#define __DB_H
#include <string>
#include <list>
#include <db_cxx.h>
#include "util.hh"
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using namespace std;
class Database;
class Transaction
{
friend class Database;
private:
DbTxn * txn;
public:
Transaction();
Transaction(Database & _db);
~Transaction();
void commit();
};
#define noTxn Transaction()
class Database
{
friend class Transaction;
private:
DbEnv * env;
void requireEnv();
Db * openDB(const Transaction & txn,
const string & table, bool create);
public:
Database();
~Database();
void open(const string & path);
void createTable(const string & table);
bool queryString(const Transaction & txn, const string & table,
const string & key, string & data);
bool queryStrings(const Transaction & txn, const string & table,
const string & key, Strings & data);
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void setString(const Transaction & txn, const string & table,
const string & key, const string & data);
void setStrings(const Transaction & txn, const string & table,
const string & key, const Strings & data);
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void delPair(const Transaction & txn, const string & table,
const string & key);
void enumTable(const Transaction & txn, const string & table,
Strings & keys);
};
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#endif /* !__DB_H */