date

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// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.
 
#ifndef tools_wroot_date
#define tools_wroot_date
 
//_MSC_VER (= Microsoft VisualC++) :
//  localtime_r() does not exist on Windows and we can't use the
//  Windows ::GetLocalTime() since G4 do not want to include windows.h.
//  Then we stay with the not thread safe localtime().
 
#include <time.h>
 
namespace tools {
namespace wroot {
 
typedef unsigned int date;
 
inline date get_date(){
  // Set Date/Time to current time as reported by the system.
  // Date and Time are encoded into one single unsigned 32 bit word.
  // Date is stored with the origin being the 1st january 1995.
  // Time has 1 second precision.
  time_t tloc = ::time(0);
#ifdef _MSC_VER
  struct tm *tp = (tm*)::localtime(&tloc); //not thread safe (but exist on Windows).
#else
  struct tm tpa;
  struct tm *tp = (tm*)::localtime_r(&tloc, &tpa); //does not exist on Windows.
#endif
  unsigned int year   = tp->tm_year;
  unsigned int month  = tp->tm_mon + 1;
  unsigned int day    = tp->tm_mday;
  unsigned int hour   = tp->tm_hour;
  unsigned int min    = tp->tm_min;
  unsigned int sec    = tp->tm_sec;
  return ((year-95)<<26 | month<<22 | day<<17 | hour<<12 | min<<6 | sec);
}
 
}}
 
#endif