trncm.c

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/*  trncm.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 trncm(Cpx *a, int n)
{
    Cpx s, *p, *q;
 
    int i, j, e;
 
    for (i = 0, e = n - 1; i < n - 1; ++i, --e, a += n + 1) {
        for (j = 0, p = a + 1, q = a + n; j < e; ++j) {
            s = *p;
            *p++ = *q;
            *q = s;
            q += n;
        }
    }
}