mirror of
https://github.com/opencv/opencv.git
synced 2024-11-29 13:47:32 +08:00
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/* srot.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 "clapack.h"
|
|
|
|
|
|
/* Subroutine */ int srot_(integer *n, real *sx, integer *incx, real *sy,
|
|
integer *incy, real *c__, real *s)
|
|
{
|
|
/* System generated locals */
|
|
integer i__1;
|
|
|
|
/* Local variables */
|
|
integer i__, ix, iy;
|
|
real stemp;
|
|
|
|
/* .. Scalar Arguments .. */
|
|
/* .. */
|
|
/* .. Array Arguments .. */
|
|
/* .. */
|
|
|
|
/* Purpose */
|
|
/* ======= */
|
|
|
|
/* applies a plane rotation. */
|
|
|
|
/* Further Details */
|
|
/* =============== */
|
|
|
|
/* jack dongarra, linpack, 3/11/78. */
|
|
/* modified 12/3/93, array(1) declarations changed to array(*) */
|
|
|
|
|
|
/* .. Local Scalars .. */
|
|
/* .. */
|
|
/* Parameter adjustments */
|
|
--sy;
|
|
--sx;
|
|
|
|
/* 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__) {
|
|
stemp = *c__ * sx[ix] + *s * sy[iy];
|
|
sy[iy] = *c__ * sy[iy] - *s * sx[ix];
|
|
sx[ix] = stemp;
|
|
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__) {
|
|
stemp = *c__ * sx[i__] + *s * sy[i__];
|
|
sy[i__] = *c__ * sy[i__] - *s * sx[i__];
|
|
sx[i__] = stemp;
|
|
/* L30: */
|
|
}
|
|
return 0;
|
|
} /* srot_ */
|