datastore.h

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#ifndef DATASTORE_H
#define DATASTORE_H 
#include <iostream>
#include <string>
#include <sstream>
#include <cstdlib>
#include <algorithm>
#include <exception>
#include <stdexcept>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <fstream>
#include <errno.h>
#include "cdb.h"
#include "cdb_make.h"
#define BADLOGRECORD 0
#define CANTBACKUPDATABASE 1
// This code is copyright Joshua Smith 2004
// and is released under the GPL
namespace Constant {

  class Datastore {
  private:
    cdb *db;
    int fd;
    std::ofstream logfile;
    std::ifstream key_sequencedb;
    std::string dbfilename;
    std::string logfilename;
    std::string last_key;
    uint32 end_of_data;
  public:
    Datastore();
    Datastore(const std::string &filen);

    ~Datastore();
    std::string fetch(const std::string &key_val);

    std::string fetch_next();

    void setdb(const std::string &filen);

    std::string operator[](const std::string &);

    void initlog(const std::string &logfilen);

    void log(const std::string&,const std::string &);

    void commitlog();
    
    void commitlog(const std::string &);

    void backupdb();

    void dump(const std::string &dumpfilename);

    std::pair<std::string,std::string> first();
    std::pair<std::string,std::string> next();
    
  private:
    int statdb();
    //int check_filesys_space();
  };
}
#endif

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