/*
   +----------------------------------------------------------------------+
   | HipHop for PHP                                                       |
   +----------------------------------------------------------------------+
   | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.txt                                  |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
*/
#ifndef incl_HPHP_KERNEL_VERSION_H_
#define incl_HPHP_KERNEL_VERSION_H_

#include <string>

namespace HPHP {

struct KernelVersion {
  // <major>.<minor>.<release>-<build>_fbk<fbk>
  int m_major;
  int m_minor;
  int m_release;
  int m_build;
  std::string m_release_str;
  std::string m_build_str;
  int m_fbk;
  KernelVersion();             // Use uname
  explicit KernelVersion(const char*);  // A known kernel version for cmp.
  static int cmp(const KernelVersion& l, const KernelVersion& r) {
#define C(field) if (l.field != r.field) return l.field - r.field;
    C(m_major);
    C(m_minor);
    C(m_release);
    C(m_build);
    C(m_fbk);
#undef C
    return 0;
  }
  private:
  void parse(const char* c);
  bool isNumber(const std::string s);
};

}

#endif