//
// File: xrotg.cpp
//
// MATLAB Coder version            : 5.2
// C/C++ source code generated on  : 24-Mar-2023 11:40:08
//

// Include Files
#include "fun9_xrotg.h"
#include "rt_nonfinite.h"
#include <cmath>

// Function Definitions
//
// Arguments    : double *a
//                double *b
//                double *c
//                double *s
// Return Type  : void
//
namespace coder {
namespace internal {
namespace blas {
void xrotg(double *a, double *b, double *c, double *s)
{
  double absa;
  double absb;
  double roe;
  double scale;
  roe = *b;
  absa = std::abs(*a);
  absb = std::abs(*b);
  if (absa > absb) {
    roe = *a;
  }
  scale = absa + absb;
  if (scale == 0.0) {
    *s = 0.0;
    *c = 1.0;
    *a = 0.0;
    *b = 0.0;
  } else {
    double ads;
    double bds;
    ads = absa / scale;
    bds = absb / scale;
    scale *= std::sqrt(ads * ads + bds * bds);
    if (roe < 0.0) {
      scale = -scale;
    }
    *c = *a / scale;
    *s = *b / scale;
    if (absa > absb) {
      *b = *s;
    } else if (*c != 0.0) {
      *b = 1.0 / *c;
    } else {
      *b = 1.0;
    }
    *a = scale;
  }
}

} // namespace blas
} // namespace internal
} // namespace coder

//
// File trailer for xrotg.cpp
//
// [EOF]
//