Teuchos Package Browser (Single Doxygen Collection) Version of the Day
Loading...
Searching...
No Matches
Teuchos_MatrixMarket_SymmetrizingGraphAdder.hpp
Go to the documentation of this file.
1// @HEADER
2// ***********************************************************************
3//
4// Tpetra: Templated Linear Algebra Services Package
5// Copyright (2008) Sandia Corporation
6//
7// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
8// the U.S. Government retains certain rights in this software.
9//
10// Redistribution and use in source and binary forms, with or without
11// modification, are permitted provided that the following conditions are
12// met:
13//
14// 1. Redistributions of source code must retain the above copyright
15// notice, this list of conditions and the following disclaimer.
16//
17// 2. Redistributions in binary form must reproduce the above copyright
18// notice, this list of conditions and the following disclaimer in the
19// documentation and/or other materials provided with the distribution.
20//
21// 3. Neither the name of the Corporation nor the names of the
22// contributors may be used to endorse or promote products derived from
23// this software without specific prior written permission.
24//
25// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
26// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
29// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36//
37// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
38//
39// ************************************************************************
40// @HEADER
41
42#ifndef __Teuchos_MatrixMarket_SymmetrizingGraphAdder_hpp
43#define __Teuchos_MatrixMarket_SymmetrizingGraphAdder_hpp
44
45#include <Teuchos_as.hpp>
47#include <string>
48
49
50// Macro that marks a function as "possibly unused," in order to
51// suppress build warnings.
52#if ! defined(TRILINOS_UNUSED_FUNCTION)
53# if defined(__GNUC__) || (defined(__INTEL_COMPILER) && !defined(_MSC_VER))
54# define TRILINOS_UNUSED_FUNCTION __attribute__((__unused__))
55# elif defined(__clang__)
56# if __has_attribute(unused)
57# define TRILINOS_UNUSED_FUNCTION __attribute__((__unused__))
58# else
59# define TRILINOS_UNUSED_FUNCTION
60# endif // Clang has 'unused' attribute
61# elif defined(__IBMCPP__)
62// IBM's C++ compiler for Blue Gene/Q (V12.1) implements 'used' but not 'unused'.
63//
64// http://pic.dhe.ibm.com/infocenter/compbg/v121v141/index.jsp
65# define TRILINOS_UNUSED_FUNCTION
66# else // some other compiler
67# define TRILINOS_UNUSED_FUNCTION
68# endif
69#endif // ! defined(TRILINOS_UNUSED_FUNCTION)
70
71
72namespace Teuchos {
73 namespace MatrixMarket {
74
94 template<class AdderType>
96 public:
98 typedef typename AdderType::index_type index_type;
99
107 const std::string& symmType) :
108 adder_ (adder),
109 symmetrize_ (needsSymmetrization (symmType)),
110 skew_ (isSkew (symmType))
111 {}
112
114 void
116 const index_type j)
117 {
119
120 theAdder (i, j);
121 if (symmetrize_ && i != j) {
122 // The optional third argument (which defaults to true)
123 // specifies whether or not to count the entry against the
124 // total expected number of entries. We don't want to count
125 // this entry because it wasn't part of the original data;
126 // we inserted it because the caller doesn't want symmetric
127 // storage. The original data's total expected number of
128 // entries only counts the entries that are in the original
129 // data, not those that we insert.
130 theAdder (j, i, false);
131 }
132 }
133
138 return adder_;
139 }
140
141 private:
147 bool skew_;
148 };
149
150 } // namespace MatrixMarket
151} // namespace Teuchos
152
153#endif // __Teuchos_MatrixMarket_SymmetrizingGraphAdder_hpp
Defines basic traits for the scalar field type.
Definition of Teuchos::as, for conversions between types.
Adds entries with optional symmetry to a sparse graph.
void operator()(const index_type i, const index_type j)
Add entry (i,j), and optionally symmetrize.
SymmetrizingGraphAdder(const Teuchos::RCP< AdderType > &adder, const std::string &symmType)
Constructor.
AdderType::index_type index_type
The type of indices of the sparse graph.
Teuchos::RCP< AdderType > getAdder() const
Persisting non-const view of the underlying adder object.
Teuchos::RCP< AdderType > adder_
The wrapped AdderType instance.
Concrete serial communicator subclass.
Matrix Market file utilities.