internal/ceres/blas.h

// Ceres Solver - A fast non-linear least squares minimizer
// Copyright 2013 Google Inc. All rights reserved.
// http://code.google.com/p/ceres-solver/
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// Author: sameeragarwal@google.com (Sameer Agarwal)
//
// Wrapper functions around BLAS functions.

#ifndef CERES_INTERNAL_BLAS_H_
#define CERES_INTERNAL_BLAS_H_

namespace ceres {
namespace internal {

class BLAS {
 public:
  // transpose = true  : c = alpha * a'a + beta * c;
  // transpose = false : c = alpha * aa' + beta * c;
  //
  // Assumes column major matrices.
  static void SymmetricRankKUpdate(int num_rows,
                                   int num_cols,
                                   const double* a,
                                   bool transpose,
                                   double alpha,
                                   double beta,
                                   double* c);
};

}  // namespace internal
}  // namespace ceres

#endif  // CERES_INTERNAL_BLAS_H_