53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
#ifdef __cplusplus
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extern "C" {
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#endif
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#include "lmp_f2c.h"
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int zswap_(integer *n, doublecomplex *zx, integer *incx, doublecomplex *zy, integer *incy)
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{
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integer i__1, i__2, i__3;
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integer i__, ix, iy;
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doublecomplex ztemp;
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--zy;
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--zx;
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if (*n <= 0) {
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return 0;
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}
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if (*incx == 1 && *incy == 1) {
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i__1 = *n;
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for (i__ = 1; i__ <= i__1; ++i__) {
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i__2 = i__;
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ztemp.r = zx[i__2].r, ztemp.i = zx[i__2].i;
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i__2 = i__;
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i__3 = i__;
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zx[i__2].r = zy[i__3].r, zx[i__2].i = zy[i__3].i;
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i__2 = i__;
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zy[i__2].r = ztemp.r, zy[i__2].i = ztemp.i;
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}
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} else {
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ix = 1;
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iy = 1;
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if (*incx < 0) {
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ix = (-(*n) + 1) * *incx + 1;
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}
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if (*incy < 0) {
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iy = (-(*n) + 1) * *incy + 1;
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}
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i__1 = *n;
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for (i__ = 1; i__ <= i__1; ++i__) {
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i__2 = ix;
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ztemp.r = zx[i__2].r, ztemp.i = zx[i__2].i;
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i__2 = ix;
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i__3 = iy;
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zx[i__2].r = zy[i__3].r, zx[i__2].i = zy[i__3].i;
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i__2 = iy;
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zy[i__2].r = ztemp.r, zy[i__2].i = ztemp.i;
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ix += *incx;
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iy += *incy;
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}
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}
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return 0;
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}
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#ifdef __cplusplus
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}
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#endif
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