aria2/src/Range.h

/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 Tatsuhiro Tsujikawa
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
 */
/* copyright --> */
#ifndef _D_RANGE_H_
#define _D_RANGE_H_

#include "common.h"
#include "SharedHandle.h"

namespace aria2 {

class Range {
private:
  off_t startByte_;
  off_t endByte_;
  uint64_t entityLength_;
public:
  Range():startByte_(0), endByte_(0), entityLength_(0) {}

  Range(off_t startByte, off_t endByte, uint64_t entityLength):
    startByte_(startByte), endByte_(endByte), entityLength_(entityLength) {}

  bool operator==(const Range& range) const
  {
    return startByte_ == range.startByte_ &&
      endByte_ == range.endByte_ &&
      entityLength_ == range.entityLength_;
  }

  bool operator!=(const Range& range) const
  {
    return !(*this == range);
  }

  off_t getStartByte() const
  {
    return startByte_;
  }

  off_t getEndByte() const
  {
    return endByte_;
  }

  uint64_t getEntityLength() const
  {
    return entityLength_;
  }

  uint64_t getContentLength() const
  {
    if(endByte_ >= startByte_) {
      return endByte_-startByte_+1;
    } else {
      return 0;
    }
  }
};

typedef SharedHandle<Range> RangeHandle;

} // namespace aria2

#endif // _D_RANGE_H_