69 lines
1.1 KiB
C
69 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: implementation of DIV and MOD
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Author: Ceriel J.H. Jacobs
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Version: $Header$
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Reason: We cannot use DVI and RMI, because DVI rounds towards 0
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and Modula-2 requires truncation
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*/
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#include <em_abs.h>
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int
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dvi(j,i)
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int j,i;
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{
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if (j == 0) TRP(EIDIVZ);
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if ((i < 0) != (j < 0)) {
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if (i < 0) i = -i;
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else j = -j;
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return -((i+j-1)/j);
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}
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else return i/j;
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}
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long
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dvil(j,i)
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long j,i;
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{
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if (j == 0) TRP(EIDIVZ);
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if ((i < 0) != (j < 0)) {
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if (i < 0) i = -i;
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else j = -j;
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return -((i+j-1)/j);
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}
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else return i/j;
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}
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int
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rmi(j,i)
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int j,i;
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{
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if (j == 0) TRP(EIDIVZ);
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if (i == 0) return 0;
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if ((i < 0) != (j < 0)) {
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if (i < 0) i = -i;
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else j = -j;
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return j*((i+j-1)/j)-i;
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}
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else return i%j;
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}
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long
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rmil(j,i)
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long j,i;
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{
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if (j == 0) TRP(EIDIVZ);
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if (i == 0) return 0L;
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if ((i < 0) != (j < 0)) {
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if (i < 0) i = -i;
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else j = -j;
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return j*((i+j-1)/j)-i;
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}
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else return i%j;
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}
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