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/*----------------------------------------------------------------------------
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 *-------------------------      M a R T E   O S      ------------------------
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 *----------------------------------------------------------------------------
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 *                                                           V1.0  Dec 2001
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 *
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 *                    't i m e s p e c _ o p e r a t i o n s'
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 *
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 *                                      H
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 *
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 * File 'timespec_operations.h'                                        by MAR.
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 *                                (july 2002)  transformed into macros by Jul.
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 * Some basic operations with the type 'timespec'.
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 *
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 * ----------------------------------------------------------------------
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 *  Copyright (C) 2001   Universidad de Cantabria, SPAIN
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 *
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 *  Authors: Mario Aldea Rivas          aldeam@ctr.unican.es
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 *           Michael Gonzalez Harbour      mgh@ctr.unican.es
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 *
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 * MaRTE OS  is free software; you can  redistribute it and/or  modify it
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 * under the terms of the GNU General Public License  as published by the
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 * Free Software Foundation;  either  version 2, or (at  your option) any
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 * later version.
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 *
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 * MaRTE OS  is distributed  in the  hope  that  it will be   useful, but
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 * WITHOUT  ANY  WARRANTY;     without  even the   implied   warranty  of
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 * MERCHANTABILITY  or  FITNESS FOR A  PARTICULAR PURPOSE.    See the GNU
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 * General Public License for more details.
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 *
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 * You should have received  a  copy of  the  GNU General Public  License
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 * distributed with MaRTE  OS;  see file COPYING.   If not,  write to the
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 * Free Software  Foundation,  59 Temple Place  -  Suite 330,  Boston, MA
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 * 02111-1307, USA.
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 *
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 * As a  special exception, if you  link this  unit  with other  files to
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 * produce an   executable,   this unit  does  not  by  itself cause  the
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 * resulting executable to be covered by the  GNU General Public License.
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 * This exception does  not however invalidate  any other reasons why the
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 * executable file might be covered by the GNU Public License.
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 *
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 *---------------------------------------------------------------------------*/
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#ifndef _MARTE_MISC_TIMESPEC_OPERATIONS_H_
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#define _MARTE_MISC_TIMESPEC_OPERATIONS_H_
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#include <time.h>
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#define smaller_timespec(t1, t2) \
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 ( \
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  (t1)->tv_sec < (t2)->tv_sec || ((t1)->tv_sec == (t2)->tv_sec &&   \
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                                     (t1)->tv_nsec < (t2)->tv_nsec) \
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 )
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#define smaller_or_equal_timespec(t1, t2) \
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 ( \
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  (t1)->tv_sec < (t2)->tv_sec || ((t1)->tv_sec == (t2)->tv_sec &&    \
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                                     (t1)->tv_nsec <= (t2)->tv_nsec) \
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 )
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#define incr_timespec(t1, t2) \
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{ \
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  (t1)->tv_sec += (t2)->tv_sec; \
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  (t1)->tv_nsec += (t2)->tv_nsec; \
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  if ((t1)->tv_nsec >= 1000000000) { \
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    (t1)->tv_sec ++; \
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    (t1)->tv_nsec -= 1000000000; \
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  } \
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}
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#define decr_timespec(t1, t2) \
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{ \
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  if ((t1)->tv_nsec < (t2)->tv_nsec) { \
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    (t1)->tv_sec -= (t2)->tv_sec + 1; \
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    (t1)->tv_nsec = (t1)->tv_nsec + 1000000000 - (t2)->tv_nsec; \
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  } else { \
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    (t1)->tv_sec -= (t2)->tv_sec; \
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    (t1)->tv_nsec -= (t2)->tv_nsec; \
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  } \
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}
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#define  add_timespec( sum , t1 , t2 ) \
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{ \
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  (sum)->tv_sec  = (t1)->tv_sec  + (t2)->tv_sec; \
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  (sum)->tv_nsec = (t1)->tv_nsec + (t2)->tv_nsec; \
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  if ((sum)->tv_nsec >= 1000000000) { \
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    (sum)->tv_sec ++; \
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    (sum)->tv_nsec -= 1000000000; \
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  } \
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}
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#define float_to_timespec( f1 , t1 ) \
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( \
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  (t1)->tv_sec = (int)(f1), \
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  (t1)->tv_nsec = (int)(((f1)-(float)((t1)->tv_sec))*1000000000.0), \
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  (t1) \
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)
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#define float_to_timespec_value(f1, t1) \
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( \
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  (t1).tv_sec = (int)(f1), \
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  (t1).tv_nsec = (int)(((f1)-(float)((t1).tv_sec))*1000000000.0), \
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  (t1) \
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)
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#endif /* _MARTE_MISC_TIMESPEC_OPERATIONS_H_ */
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