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/* blas/zdscal.f -- translated by f2c (version 20050501).
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
*/
#ifdef __cplusplus
extern "C" {
#endif
#include "v3p_netlib.h"
/*< subroutine zdscal(n,da,zx,incx) >*/
/* 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;
/* 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(*) */
/*< double complex zx(*) >*/
/*< double precision da >*/
/*< integer i,incx,ix,n >*/
/*< if( n.le.0 .or. incx.le.0 )return >*/
/* Parameter adjustments */
--zx;
/* Function Body */
if (*n <= 0 || *incx <= 0) {
return 0;
}
/*< if(incx.eq.1)go to 20 >*/
if (*incx == 1) {
goto L20;
}
/* code for increment not equal to 1 */
/*< ix = 1 >*/
ix = 1;
/*< do 10 i = 1,n >*/
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
/*< zx(ix) = dcmplx(da,0.0d0)*zx(ix) >*/
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 = ix + incx >*/
ix += *incx;
/*< 10 continue >*/
/* L10: */
}
/*< return >*/
return 0;
/* code for increment equal to 1 */
/*< 20 do 30 i = 1,n >*/
L20:
i__1 = *n;
for (i__ = 1; i__ <= i__1; ++i__) {
/*< zx(i) = dcmplx(da,0.0d0)*zx(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;
/*< 30 continue >*/
/* L30: */
}
/*< return >*/
return 0;
/*< end >*/
} /* zdscal_ */
#ifdef __cplusplus
}
#endif
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