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/
4//
5// Redistribution and use in source and binary forms, with or without
6// modification, are permitted provided that the following conditions are met:
7//
8// * Redistributions of source code must retain the above copyright notice,
9//   this list of conditions and the following disclaimer.
10// * Redistributions in binary form must reproduce the above copyright notice,
11//   this list of conditions and the following disclaimer in the documentation
12//   and/or other materials provided with the distribution.
13// * Neither the name of Google Inc. nor the names of its contributors may be
14//   used to endorse or promote products derived from this software without
15//   specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
21// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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28//
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
36namespace ceres {
37namespace internal {
38
39class 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