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kpeter (Peter Kovacs)
Use XTI implementation instead of ATI in NetworkSimplex (#234) XTI (eXtended Threaded Index) is an imporved version of the widely known ATI (Augmented Threaded Index) method for storing and updating the spanning tree structure in Network Simplex algorithms. In the ATI data structure three indices are stored for each node: predecessor, thread and depth. In the XTI data structure depth is replaced by the number of successors and the last successor (according to the thread index).
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/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2009

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */



///\file

///\brief Some basic non-inline functions and static global data.



#include<lemon/bits/windows.h>



#ifdef WIN32

#ifndef WIN32_LEAN_AND_MEAN

#define WIN32_LEAN_AND_MEAN

#endif

#ifndef NOMINMAX

#define NOMINMAX

#endif

#ifdef UNICODE

#undef UNICODE

#endif

#include <windows.h>

#ifdef LOCALE_INVARIANT

#define MY_LOCALE LOCALE_INVARIANT

#else

#define MY_LOCALE LOCALE_NEUTRAL

#endif

#else

#include <unistd.h>

#include <ctime>

#include <sys/times.h>

#include <sys/time.h>

#endif



#include <cmath>

#include <sstream>



namespace lemon {

  namespace bits {

    void getWinProcTimes(double &rtime,

                         double &utime, double &stime,

                         double &cutime, double &cstime)

    {

#ifdef WIN32

      static const double ch = 4294967296.0e-7;

      static const double cl = 1.0e-7;



      FILETIME system;

      GetSystemTimeAsFileTime(&system);

      rtime = ch * system.dwHighDateTime + cl * system.dwLowDateTime;



      FILETIME create, exit, kernel, user;

      if (GetProcessTimes(GetCurrentProcess(),&create, &exit, &kernel, &user)) {

        utime = ch * user.dwHighDateTime + cl * user.dwLowDateTime;

        stime = ch * kernel.dwHighDateTime + cl * kernel.dwLowDateTime;

        cutime = 0;

        cstime = 0;

      } else {

        rtime = 0;

        utime = 0;

        stime = 0;

        cutime = 0;

        cstime = 0;

      }

#else

      timeval tv;

      gettimeofday(&tv, 0);

      rtime=tv.tv_sec+double(tv.tv_usec)/1e6;



      tms ts;

      double tck=sysconf(_SC_CLK_TCK);

      times(&ts);

      utime=ts.tms_utime/tck;

      stime=ts.tms_stime/tck;

      cutime=ts.tms_cutime/tck;

      cstime=ts.tms_cstime/tck;

#endif

    }



    std::string getWinFormattedDate()

    {

      std::ostringstream os;

#ifdef WIN32

      SYSTEMTIME time;

      GetSystemTime(&time);

      char buf1[11], buf2[9], buf3[5];

	  if (GetDateFormat(MY_LOCALE, 0, &time,

                        ("ddd MMM dd"), buf1, 11) &&

          GetTimeFormat(MY_LOCALE, 0, &time,

                        ("HH':'mm':'ss"), buf2, 9) &&

          GetDateFormat(MY_LOCALE, 0, &time,

                        ("yyyy"), buf3, 5)) {

        os << buf1 << ' ' << buf2 << ' ' << buf3;

      }

      else os << "unknown";

#else

      timeval tv;

      gettimeofday(&tv, 0);



      char cbuf[26];

      ctime_r(&tv.tv_sec,cbuf);

      os << cbuf;

#endif

      return os.str();

    }



    int getWinRndSeed()

    {

#ifdef WIN32

      FILETIME time;

      GetSystemTimeAsFileTime(&time);

      return GetCurrentProcessId() + time.dwHighDateTime + time.dwLowDateTime;

#else

      timeval tv;

      gettimeofday(&tv, 0);

      return getpid() + tv.tv_sec + tv.tv_usec;

#endif

    }

  }

}