85 lines
2 KiB
C
85 lines
2 KiB
C
/* -- translated by f2c (version 19940927).
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You must link the resulting object file with the libraries:
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-lf2c -lm (in that order)
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*/
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#include "f2c.h"
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/* Double Complex */ VOID zdotc_(doublecomplex * ret_val, integer *n,
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doublecomplex *zx, integer *incx, doublecomplex *zy, integer *incy)
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{
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/* System generated locals */
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integer i__1, i__2;
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doublecomplex z__1, z__2, z__3;
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/* Builtin functions */
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void d_cnjg(doublecomplex *, doublecomplex *);
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/* Local variables */
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static integer i;
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static doublecomplex ztemp;
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static integer ix, iy;
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/* forms the dot product of a vector.
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jack dongarra, 3/11/78.
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modified 12/3/93, array(1) declarations changed to array(*)
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Parameter adjustments */
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--zy;
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--zx;
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/* Function Body */
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ztemp.r = 0., ztemp.i = 0.;
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ret_val->r = 0., ret_val->i = 0.;
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if (*n <= 0) {
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return ;
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}
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if (*incx == 1 && *incy == 1) {
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goto L20;
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}
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/* code for unequal increments or equal increments
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not equal to 1 */
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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 <= *n; ++i) {
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d_cnjg(&z__3, &zx[ix]);
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i__2 = iy;
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z__2.r = z__3.r * zy[iy].r - z__3.i * zy[iy].i, z__2.i = z__3.r *
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zy[iy].i + z__3.i * zy[iy].r;
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z__1.r = ztemp.r + z__2.r, z__1.i = ztemp.i + z__2.i;
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ztemp.r = z__1.r, ztemp.i = z__1.i;
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ix += *incx;
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iy += *incy;
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/* L10: */
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}
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ret_val->r = ztemp.r, ret_val->i = ztemp.i;
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return ;
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/* code for both increments equal to 1 */
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L20:
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i__1 = *n;
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for (i = 1; i <= *n; ++i) {
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d_cnjg(&z__3, &zx[i]);
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i__2 = i;
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z__2.r = z__3.r * zy[i].r - z__3.i * zy[i].i, z__2.i = z__3.r *
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zy[i].i + z__3.i * zy[i].r;
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z__1.r = ztemp.r + z__2.r, z__1.i = ztemp.i + z__2.i;
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ztemp.r = z__1.r, ztemp.i = z__1.i;
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/* L30: */
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}
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ret_val->r = ztemp.r, ret_val->i = ztemp.i;
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return ;
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} /* zdotc_ */
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