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kpeter (Peter Kovacs)
Support negative costs and bounds in NetworkSimplex (#270) * The interface is reworked to support negative costs and bounds. - ProblemType and problemType() are renamed to SupplyType and supplyType(), see also #234. - ProblemType type is introduced similarly to the LP interface. - 'bool run()' is replaced by 'ProblemType run()' to handle unbounded problem instances, as well. - Add INF public member constant similarly to the LP interface. * Remove capacityMap() and boundMaps(), see also #266. * Update the problem definition in the MCF module. * Remove the usage of Circulation (and adaptors) for checking feasibility. Check feasibility by examining the artifical arcs instead (after solving the problem). * Additional check for unbounded negative cycles found during the algorithm (it is possible now, since negative costs are allowed). * Fix in the constructor (the value types needn't be integer any more), see also #254. * Improve and extend the doc. * Rework the test file and add test cases for negative costs and bounds.
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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

    }

  }

}