/*  -- translated by f2c (version 19940927).

   You must link the resulting object file with the libraries:

	-lf2c -lm   (in that order)

*/

#include "f2c.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 */

    static integer i;

    static real stemp;

    static integer ix, iy;

/*     applies a plane rotation.   

       jack dongarra, linpack, 3/11/78.   

       modified 12/3/93, array(1) declarations changed to array(*)   

   Parameter adjustments   

       Function Body */

#define SY(I) sy[(I)-1]

#define SX(I) sx[(I)-1]

    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 <= *n; ++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 <= *n; ++i) {

	stemp = *c * SX(i) + *s * SY(i);

	SY(i) = *c * SY(i) - *s * SX(i);

	SX(i) = stemp;

/* L30: */

    }

    return 0;

} /* srot_ */