#include "f2c.h"

/*#include "blaswrap.h"*/

/* Subroutine */ int zswap_(integer *n, doublecomplex *zx, integer *incx, 

	doublecomplex *zy, integer *incy)

{

    /* System generated locals */

    integer i__1, i__2, i__3;

    /* Local variables */

    integer i__, ix, iy;

    doublecomplex ztemp;

/*     .. Scalar Arguments .. */

/*     .. */

/*     .. Array Arguments .. */

/*     .. */

/*  Purpose */

/*  ======= */

/*     interchanges two vectors. */

/*     jack dongarra, 3/11/78. */

/*     modified 12/3/93, array(1) declarations changed to array(*) */

/*     .. Local Scalars .. */

/*     .. */

    /* Parameter adjustments */

    --zy;

    --zx;

    /* Function Body */

    if (*n <= 0) {

	return 0;

    }

    if (*incx == 1 && *incy == 1) {

	goto L20;

    }

/*       code for unequal increments or equal increments not equal */

/*         to 1 */

    ix = 1;

    iy = 1;

    if (*incx < 0) {

	ix = (-(*n) + 1) * *incx + 1;

    }

    if (*incy < 0) {

	iy = (-(*n) + 1) * *incy + 1;

    }

    i__1 = *n;

    for (i__ = 1; i__ <= i__1; ++i__) {

	i__2 = ix;

	ztemp.r = zx[i__2].r, ztemp.i = zx[i__2].i;

	i__2 = ix;

	i__3 = iy;

	zx[i__2].r = zy[i__3].r, zx[i__2].i = zy[i__3].i;

	i__2 = iy;

	zy[i__2].r = ztemp.r, zy[i__2].i = ztemp.i;

	ix += *incx;

	iy += *incy;

/* L10: */

    }

    return 0;

/*       code for both increments equal to 1 */

L20:

    i__1 = *n;

    for (i__ = 1; i__ <= i__1; ++i__) {

	i__2 = i__;

	ztemp.r = zx[i__2].r, ztemp.i = zx[i__2].i;

	i__2 = i__;

	i__3 = i__;

	zx[i__2].r = zy[i__3].r, zx[i__2].i = zy[i__3].i;

	i__2 = i__;

	zy[i__2].r = ztemp.r, zy[i__2].i = ztemp.i;

/* L30: */

    }

    return 0;

} /* zswap_ */