encfs/base/ConfigVar.h

/*****************************************************************************
 * Author:   Valient Gough <vgough@pobox.com>
 *
 *****************************************************************************
 * Copyright (c) 2004, Valient Gough
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _ConfigVar_incl_
#define _ConfigVar_incl_

#include <string>
#include "base/shared_ptr.h"
#include "base/types.h"

namespace encfs {

class ConfigVar {
  struct ConfigVarData {
    std::string buffer;
    int offset;
  };

  shared_ptr<ConfigVarData> pd;

 public:
  ConfigVar();
  ConfigVar(const std::string &buffer);
  ConfigVar(const ConfigVar &src);
  ~ConfigVar();

  ConfigVar &operator=(const ConfigVar &src);

  // reset read/write offset..
  void resetOffset();

  // read bytes
  int read(byte *buffer, int size) const;

  // write bytes..
  int write(const byte *data, int size);

  int readInt() const;
  int readInt(int defaultValue) const;
  void writeInt(int value);

  bool readBool(bool defaultValue) const;

  void writeString(const char *data, int size);

  // return amount of data in var
  int size() const;
  // return data pointer - returns front of data pointer, not the current
  // position.
  const char *buffer() const;

  // return current position in data() buffer.
  int at() const;
};

ConfigVar &operator<<(ConfigVar &, bool);
ConfigVar &operator<<(ConfigVar &, int);
ConfigVar &operator<<(ConfigVar &, const std::string &str);

const ConfigVar &operator>>(const ConfigVar &, bool &);
const ConfigVar &operator>>(const ConfigVar &, int &);
const ConfigVar &operator>>(const ConfigVar &, std::string &str);

}  //  namespace encfs

#endif