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/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* SORTS UP.
* IF THERE ARE NO EXCHANGES (IEX=0) ON A SWEEP
* THE COMPARISON GAP (IGAP) IS HALVED FOR THE NEXT SWEEP
*/
void
shell(int n, int (*comp)(), int (*exch)())
{
int igap, iplusg, iex, i, imax;
igap = n;
while (igap > 1) {
igap /= 2;
imax = n-igap;
do {
iex = 0;
for (i = 0; i < imax; i++) {
iplusg = i + igap;
if ((*comp)(i, iplusg)) continue;
(*exch) (i, iplusg);
iex = 1;
}
}
while (iex > 0)
;
}
}
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