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/* zdscal.f -- translated by f2c (version 20061008).
You must link the resulting object file with libf2c:
on Microsoft Windows system, link with libf2c.lib;
on Linux or Unix systems, link with .../path/to/libf2c.a -lm
or, if you install libf2c.a in a standard place, with -lf2c -lm
-- in that order, at the end of the command line, as in
cc *.o -lf2c -lm
Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,
http://www.netlib.org/f2c/libf2c.zip
*/
#include "f2c.h"
#include "blaswrap.h"
/* Subroutine */ int zdscal_(integer *n, doublereal *da, doublecomplex *zx,
integer *incx)
{
/* System generated locals */
integer i__1, i__2, i__3;
doublecomplex z__1, z__2;
/* Local variables */
integer i__, ix;
/* .. Scalar Arguments .. */
/* .. */
/* .. Array Arguments .. */
/* .. */
/* Purpose */
/* ======= */
/* scales a vector by a constant. */
/* jack dongarra, 3/11/78. */
/* modified 3/93 to return if incx .le. 0. */
/* modified 12/3/93, array(1) declarations changed to array(*) */
/* .. Local Scalars .. */
/* .. */
/* .. Intrinsic Functions .. */
/* .. */
/* Parameter adjustments */
--zx;
/* Function Body */
if (*n <= 0 || *incx <= 0) {
return 0;
}
if (*incx == 1) {
goto L20;
}
/* code for increment not equal to 1 */
ix = 1;
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
i__2 = ix;
z__2.r = *da, z__2.i = 0.;
i__3 = ix;
z__1.r = z__2.r * zx[i__3].r - z__2.i * zx[i__3].i, z__1.i = z__2.r *
zx[i__3].i + z__2.i * zx[i__3].r;
zx[i__2].r = z__1.r, zx[i__2].i = z__1.i;
ix += *incx;
/* L10: */
}
return 0;
/* code for increment equal to 1 */
L20:
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
i__2 = i__;
z__2.r = *da, z__2.i = 0.;
i__3 = i__;
z__1.r = z__2.r * zx[i__3].r - z__2.i * zx[i__3].i, z__1.i = z__2.r *
zx[i__3].i + z__2.i * zx[i__3].r;
zx[i__2].r = z__1.r, zx[i__2].i = z__1.i;
/* L30: */
}
return 0;
} /* zdscal_ */
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