66 lines
1.1 KiB
C
66 lines
1.1 KiB
C
/*
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* (c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*
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*
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* Module: CARDINAL operations with overflow checking
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* Author: Ceriel J.H. Jacobs
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* Version: $Id$
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*/
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#ifndef EM_WSIZE
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#define EM_WSIZE _EM_WSIZE
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#endif
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#ifndef EM_LSIZE
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#define EM_LSIZE _EM_LSIZE
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#endif
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#include "libm2.h"
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#include <m2_traps.h>
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#define MAXCARD ((unsigned)-1)
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#if EM_WSIZE < EM_LSIZE
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#define MAXLONGCARD ((unsigned long)-1L)
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#endif
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void adduchk(unsigned int a, unsigned int b)
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{
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if (MAXCARD - a < b)
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TRP(M2_UOVFL);
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}
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#if EM_WSIZE < EM_LSIZE
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void addulchk(unsigned long a, unsigned long b)
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{
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if (MAXLONGCARD - a < b)
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TRP(M2_UOVFL);
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}
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#endif
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void muluchk(unsigned int a, unsigned int b)
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{
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if (a != 0 && MAXCARD / a < b)
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TRP(M2_UOVFL);
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}
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#if EM_WSIZE < EM_LSIZE
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void mululchk(unsigned long a, unsigned long b)
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{
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if (a != 0 && MAXLONGCARD / a < b)
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TRP(M2_UOVFL);
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}
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#endif
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void subuchk(unsigned int a, unsigned int b)
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{
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if (b < a)
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TRP(M2_UUVFL);
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}
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#if EM_WSIZE < EM_LSIZE
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void subulchk(unsigned long a, unsigned long b)
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{
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if (b < a)
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TRP(M2_UUVFL);
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}
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#endif
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