/* * (c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands. * See the copyright notice in the ACK home directory, in the file "Copyright". * * * Module:	CARDINAL operations with overflow checking * Author:	Ceriel J.H. Jacobs * Version:	$Header: /cvsup/minix/src/lib/ack/libm2/ucheck.c,v 1.1 2005/10/10 15:27:46 beng Exp $*/#ifndef EM_WSIZE#define EM_WSIZE _EM_WSIZE#endif#ifndef EM_LSIZE#define EM_LSIZE _EM_LSIZE#endif#include <m2_traps.h>#define MAXCARD	((unsigned)-1)#if EM_WSIZE < EM_LSIZE#define MAXLONGCARD	((unsigned long) -1L)#endifadduchk(a,b)  unsigned	a,b;{  if (MAXCARD - a < b) TRP(M2_UOVFL);}#if EM_WSIZE < EM_LSIZEaddulchk(a,b)  unsigned long	a,b;{  if (MAXLONGCARD - a < b) TRP(M2_UOVFL);}#endifmuluchk(a,b)  unsigned	a,b;{  if (a != 0 && MAXCARD/a < b) TRP(M2_UOVFL);}#if EM_WSIZE < EM_LSIZEmululchk(a,b)  unsigned long	a,b;{  if (a != 0 && MAXLONGCARD/a < b) TRP(M2_UOVFL);}#endifsubuchk(a,b)  unsigned	a,b;{  if (b < a) TRP(M2_UUVFL);}#if EM_WSIZE < EM_LSIZEsubulchk(a,b)  unsigned long	a,b;{  if (b < a) TRP(M2_UUVFL);}#endif