Geografic-Information-System/lib/external/ccmath/hconj.c

/*  hconj.c    CCMATH mathematics library source code.
 *
 *  Copyright (C)  2000   Daniel A. Atkinson    All rights reserved.
 *  This code may be redistributed under the terms of the GNU library
 *  public license (LGPL). ( See the lgpl.license file for details.)
 * ------------------------------------------------------------------------
 */
#include "ccmath.h"
void hconj(Cpx * a, int n)
{
    Cpx s, *p, *q;

    int i, j, e;

    for (i = 0, e = n - 1; i < n; ++i, --e, a += n + 1) {
	for (j = 0, p = a + 1, q = a + n; j < e; ++j) {
	    s = *p;
	    s.im = -s.im;
	    p->re = q->re;
	    (p++)->im = -q->im;
	    *q = s;
	    q += n;
	}
	a->im = -a->im;
    }
}