SbTime.h

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/*=======================================================================
 * Copyright 1991-1996, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED
 *
 * UNPUBLISHED -- Rights reserved under the copyright laws of the United
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 * in Technical Data and Computer Software clause at DFARS 252.227-7013 and/or
 * in similar or successor clauses in the FAR, or the DOD or NASA FAR
 * Supplement.  Contractor/manufacturer is Silicon Graphics, Inc.,
 * 2011 N. Shoreline Blvd. Mountain View, CA 94039-7311.
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**=======================================================================*/
/*=======================================================================
** Author      : Nick Thompson (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef _SB_TIME_
#define _SB_TIME_
 
#include <Inventor/sys/port.h>
 
#ifdef _WIN32
#  include <time.h>
#else
#  include <sys/time.h>
#endif
 
#include <math.h>
#include <limits.h>
#include <Inventor/SbBase.h>
#include <Inventor/SbString.h>
 
//
//  Class: SbTime
//
//  Representation of a time.  Some parts are not adequately debugged:
//  for example, it is not clear when it is legal to have negative
//  values.
//
 
class  SbTime {
 
 public:
  SbTime() {}
 
  SbTime(double sec);
 
  SbTime(time_t sec, long usec);
 
 private:
  // Constructor taking milliseconds
  //
  // NOTE! This constructor has been removed.  Change existing uses of
  //          SbTime(msec)
  // to
  //          time_t secs = msec / 1000;
  //          SbTime(secs, 1000 * (msec - 1000 * sec))
  // The constructor was removed because it led to unexpected results --
  // while SbTime(1.0) results in 1 second, SbTime(1) resulted in 1
  // MILLIsecond).  Its declaration has been kept, as "private", so that 
  // existing code using it will get compilation errors; if it was removed
  // completely, an existing use of SbTime(1) would silently cast to
  // SbTime(1.0) resulting in hard-to-find bugs.  This declaration
  // will be removed entirely in a future release, so that SbTime(1)
  // will be equivalent to SbTime(1.0).
  SbTime(uint32_t msec);
 
 public:
  SbTime(const struct timeval *tv);
 
  static SbTime getTimeOfDay();
 
  void setToTimeOfDay();
 
  static SbTime zero();
  
  static void sleep(const int msec);
 
  static void usleep(size_t usec);
 
#if !defined(_WIN32)
  static SbTime max();
#endif
 
  static SbTime maxTime();
 
  void setValue(double sec);
 
  void setValue(time_t sec, long usec);
 
  void setValue(const struct timeval *tv);
 
  void setMsecValue(unsigned long msec);
 
  double getValue() const;
 
  void getValue(time_t &sec, long &usec) const;
 
  void getValue(struct timeval *tv) const;
 
  unsigned long getMsecValue() const;
 
  SbString format(const char *fmt = "%S.%i") const;
 
#ifdef _WIN32
#  define DEFAULT_FORMAT_DATE   "%#c"
#else  
#  define DEFAULT_FORMAT_DATE   "%A, %D %r"
#endif
  SbString formatDate(const char *fmt = DEFAULT_FORMAT_DATE) const;
 
   friend SbTime operator +(const SbTime &t0, const SbTime &t1);
 
   friend SbTime operator -(const SbTime &t0, const SbTime &t1);
 
  SbTime &operator +=(const SbTime &tm);
 
  SbTime &operator -=(const SbTime &tm);
 
  SbTime operator -() const;
 
   friend SbTime operator *(const SbTime &tm, double s);
   friend SbTime operator *(double s, const SbTime &tm);
 
  SbTime &operator *=(double s);
 
   friend SbTime operator /(const SbTime &tm, double s);
 
  SbTime & operator /=(double s);
 
  double operator /(const SbTime &tm) const;
 
  SbTime operator %(const SbTime &tm) const;
 
  int operator ==(const SbTime &tm) const;
 
  int operator !=(const SbTime &tm) const;
 
  inline SbBool operator <(const SbTime &tm) const;
  inline SbBool operator >(const SbTime &tm) const;
  inline SbBool operator <=(const SbTime &tm) const;
  inline SbBool operator >=(const SbTime &tm) const;
 
 private:
  struct timeval t;
 
};
 
inline SbBool
SbTime::operator <(const SbTime &tm) const
{
  if ((t.tv_sec < tm.t.tv_sec) ||
      (t.tv_sec == tm.t.tv_sec && t.tv_usec < tm.t.tv_usec))
    return TRUE;
  else
    return FALSE;
}
 
inline SbBool
SbTime::operator >(const SbTime &tm) const
{
  if ((t.tv_sec > tm.t.tv_sec) ||
      (t.tv_sec == tm.t.tv_sec && t.tv_usec > tm.t.tv_usec))
    return TRUE;
  else
    return FALSE;
}
 
inline SbBool
SbTime::operator <=(const SbTime &tm) const
{
  if ((t.tv_sec < tm.t.tv_sec) ||
      (t.tv_sec == tm.t.tv_sec && t.tv_usec <= tm.t.tv_usec))
    return TRUE;
  else
    return FALSE;
}
 
inline SbBool
SbTime::operator >=(const SbTime &tm) const
{
  if ((t.tv_sec > tm.t.tv_sec) ||
      (t.tv_sec == tm.t.tv_sec && t.tv_usec >= tm.t.tv_usec))
    return TRUE;
  else
    return FALSE;
}
 
#endif /* _SB_TIME_ */