69 lines
1.1 KiB
C
69 lines
1.1 KiB
C
/*
|
|
(c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
See the copyright notice in the ACK home directory, in the file "Copyright".
|
|
*/
|
|
|
|
/*
|
|
Module: implementation of DIV and MOD
|
|
Author: Ceriel J.H. Jacobs
|
|
Version: $Id$
|
|
Reason: We cannot use DVI and RMI, because DVI rounds towards 0
|
|
and Modula-2 requires truncation
|
|
*/
|
|
|
|
#include <em_abs.h>
|
|
|
|
int
|
|
dvi(j,i)
|
|
int j,i;
|
|
{
|
|
if (j == 0) TRP(EIDIVZ);
|
|
if ((i < 0) != (j < 0)) {
|
|
if (i < 0) i = -i;
|
|
else j = -j;
|
|
return -((i+j-1)/j);
|
|
}
|
|
else return i/j;
|
|
}
|
|
|
|
long
|
|
dvil(j,i)
|
|
long j,i;
|
|
{
|
|
if (j == 0) TRP(EIDIVZ);
|
|
if ((i < 0) != (j < 0)) {
|
|
if (i < 0) i = -i;
|
|
else j = -j;
|
|
return -((i+j-1)/j);
|
|
}
|
|
else return i/j;
|
|
}
|
|
|
|
int
|
|
rmi(j,i)
|
|
int j,i;
|
|
{
|
|
if (j == 0) TRP(EIDIVZ);
|
|
if (i == 0) return 0;
|
|
if ((i < 0) != (j < 0)) {
|
|
if (i < 0) i = -i;
|
|
else j = -j;
|
|
return j*((i+j-1)/j)-i;
|
|
}
|
|
else return i%j;
|
|
}
|
|
|
|
long
|
|
rmil(j,i)
|
|
long j,i;
|
|
{
|
|
if (j == 0) TRP(EIDIVZ);
|
|
if (i == 0) return 0L;
|
|
if ((i < 0) != (j < 0)) {
|
|
if (i < 0) i = -i;
|
|
else j = -j;
|
|
return j*((i+j-1)/j)-i;
|
|
}
|
|
else return i%j;
|
|
}
|