1 // Ceres Solver - A fast non-linear least squares minimizer
2 // Copyright 2013 Google Inc. All rights reserved.
3 // http://code.google.com/p/ceres-solver/
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29 // Author: sameeragarwal@google.com (Sameer Agarwal)
30 //
31 // Wrapper functions around BLAS functions.
32 
33 #ifndef CERES_INTERNAL_BLAS_H_
34 #define CERES_INTERNAL_BLAS_H_
35 
36 namespace ceres {
37 namespace internal {
38 
39 class BLAS {
40  public:
41   // transpose = true  : c = alpha * a'a + beta * c;
42   // transpose = false : c = alpha * aa' + beta * c;
43   //
44   // Assumes column major matrices.
45   static void SymmetricRankKUpdate(int num_rows,
46                                    int num_cols,
47                                    const double* a,
48                                    bool transpose,
49                                    double alpha,
50                                    double beta,
51                                    double* c);
52 };
53 
54 }  // namespace internal
55 }  // namespace ceres
56 
57 #endif  // CERES_INTERNAL_BLAS_H_
58