text: /* 	Copyright (C) 1991-1994,96,97,98,99,2000,01,02
  	Free Software Foundation, Inc.
  
  	This file is part of the GNU C Library.
  
  	The GNU C Library is free software; you can redistribute it and/or
  	modify it under the terms of the GNU Lesser General Public
  	License as published by the Free Software Foundation; either
  	version 2.1 of the License, or (at your option) any later version.
  
  	The GNU C Library 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
  	Lesser General Public License for more details.
  
  	You should have received a copy of the GNU Lesser General Public
  	License along with the GNU C Library; if not, write to the Free
  	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  	02111-1307 USA.  */
  
  /* Never worry about timersub type activies again -- from GLIBC and upcased. */
  #define timersub(a, b, result) \
  	do { \
  	(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
  	(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
  	if ((result)->tv_usec < 0) { \
  		--(result)->tv_sec; \
  		(result)->tv_usec += 1000000; \
  	} \
  	} while (0)
  
  #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))
  
  #define timerclear(a) ((a)->tv_sec = (a)->tv_usec = 0)
  