#include "blaswrap.h"
/* slargv.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"

/* Subroutine */ int slargv_(integer *n, real *x, integer *incx, real *y, 
	integer *incy, real *c__, integer *incc)
{
    /* System generated locals */
    integer i__1;

    /* Builtin functions */
    double sqrt(doublereal);

    /* Local variables */
    static real f, g;
    static integer i__;
    static real t;
    static integer ic, ix, iy;
    static real tt;


/*  -- LAPACK auxiliary routine (version 3.1) --   
       Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..   
       November 2006   


    Purpose   
    =======   

    SLARGV generates a vector of real plane rotations, determined by   
    elements of the real vectors x and y. For i = 1,2,...,n   

       (  c(i)  s(i) ) ( x(i) ) = ( a(i) )   
       ( -s(i)  c(i) ) ( y(i) ) = (   0  )   

    Arguments   
    =========   

    N       (input) INTEGER   
            The number of plane rotations to be generated.   

    X       (input/output) REAL array,   
                           dimension (1+(N-1)*INCX)   
            On entry, the vector x.   
            On exit, x(i) is overwritten by a(i), for i = 1,...,n.   

    INCX    (input) INTEGER   
            The increment between elements of X. INCX > 0.   

    Y       (input/output) REAL array,   
                           dimension (1+(N-1)*INCY)   
            On entry, the vector y.   
            On exit, the sines of the plane rotations.   

    INCY    (input) INTEGER   
            The increment between elements of Y. INCY > 0.   

    C       (output) REAL array, dimension (1+(N-1)*INCC)   
            The cosines of the plane rotations.   

    INCC    (input) INTEGER   
            The increment between elements of C. INCC > 0.   

    =====================================================================   


       Parameter adjustments */
    --c__;
    --y;
    --x;

    /* Function Body */
    ix = 1;
    iy = 1;
    ic = 1;
    i__1 = *n;
    for (i__ = 1; i__ <= i__1; ++i__) {
	f = x[ix];
	g = y[iy];
	if (g == 0.f) {
	    c__[ic] = 1.f;
	} else if (f == 0.f) {
	    c__[ic] = 0.f;
	    y[iy] = 1.f;
	    x[ix] = g;
	} else if (dabs(f) > dabs(g)) {
	    t = g / f;
	    tt = sqrt(t * t + 1.f);
	    c__[ic] = 1.f / tt;
	    y[iy] = t * c__[ic];
	    x[ix] = f * tt;
	} else {
	    t = f / g;
	    tt = sqrt(t * t + 1.f);
	    y[iy] = 1.f / tt;
	    c__[ic] = t * y[iy];
	    x[ix] = g * tt;
	}
	ic += *incc;
	iy += *incy;
	ix += *incx;
/* L10: */
    }
    return 0;

/*     End of SLARGV */

} /* slargv_ */