tvl-depot/src/db.hh
Eelco Dolstra 4a013962bd * Started using Berkeley DB environments. This is necessary for
transaction support (but we don't actually use transactions yet).
2003-07-31 13:47:13 +00:00

76 lines
1.3 KiB
C++

#ifndef __DB_H
#define __DB_H
#include <string>
#include <list>
#include <db_cxx.h>
#include "util.hh"
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);
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);
void delPair(const Transaction & txn, const string & table,
const string & key);
void enumTable(const Transaction & txn, const string & table,
Strings & keys);
};
#endif /* !__DB_H */