// $Id: timeradd.h,v 1.3 2003/10/07 21:46:13 idgay Exp $/* * $Id: timeradd.h,v 1.3 2003/10/07 21:46:13 idgay Exp $ * **************************************************************************** * * uisp - The Micro In-System Programmer for Atmel AVR microcontrollers. * Copyright (C) 2002, 2003  Marek Michalkiewicz * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA * **************************************************************************** *//* I'm not sure how portable is to use these macros (they are available   on my system, but not mentioned in the glibc manual I have).   Similar macros are provided here for systems that don't have them.  -MM */#include <sys/time.h>#ifndef timeradd#define timeradd(_a, _b, _res)				\  do {							\    (_res)->tv_usec = (_a)->tv_usec + (_b)->tv_usec;	\    (_res)->tv_sec = (_a)->tv_sec + (_b)->tv_sec;	\    if ((_res)->tv_usec >= 1000000)			\      {							\        (_res)->tv_usec -= 1000000;			\        (_res)->tv_sec++;				\      }							\  } while (0)#endif#ifndef timersub#define timersub(_a, _b, _res)				\  do {							\    (_res)->tv_usec = (_a)->tv_usec - (_b)->tv_usec;	\    (_res)->tv_sec = (_a)->tv_sec - (_b)->tv_sec;	\    if ((_res)->tv_usec < 0) {				\      (_res)->tv_usec += 1000000;			\      (_res)->tv_sec--;					\    }							\  } while (0)#endif#ifndef timercmp#define timercmp(_a, _b, _cmp)				\  (((_a)->tv_sec == (_b)->tv_sec) ?			\   ((_a)->tv_usec _cmp (_b)->tv_usec) :			\   ((_a)->tv_sec _cmp (_b)->tv_sec))#endif