AbstractLinAlgPack: C++ Interfaces For Vectors, Matrices And Related Linear Algebra Objects  Version of the Day
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Groups Pages
AbstractLinAlgPack_SparseCOOReadMatrix.cpp
1 #if 0
2 
3 // @HEADER
4 // ***********************************************************************
5 //
6 // Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
7 // Copyright (2003) Sandia Corporation
8 //
9 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
10 // license for use of this work by or on behalf of the U.S. Government.
11 //
12 // Redistribution and use in source and binary forms, with or without
13 // modification, are permitted provided that the following conditions are
14 // met:
15 //
16 // 1. Redistributions of source code must retain the above copyright
17 // notice, this list of conditions and the following disclaimer.
18 //
19 // 2. Redistributions in binary form must reproduce the above copyright
20 // notice, this list of conditions and the following disclaimer in the
21 // documentation and/or other materials provided with the distribution.
22 //
23 // 3. Neither the name of the Corporation nor the names of the
24 // contributors may be used to endorse or promote products derived from
25 // this software without specific prior written permission.
26 //
27 // THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
28 // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
31 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
32 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
33 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
34 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
35 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
36 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
37 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 //
39 // Questions? Contact Roscoe A. Bartlett (rabartl@sandia.gov)
40 //
41 // ***********************************************************************
42 // @HEADER
43 
44 #include <stdlib.h>
45 
46 #include "AbstractLinAlgPack_SparseCOOReadMatrix.hpp"
47 
48 // Throw an exception if the char is not ':'
49 namespace {
50 inline void assert_sep_char(char c) {
51  if(c != ':')
52  throw AbstractLinAlgPack::InputException("Sparse COO matrix input stream error: The seperator between the element, row indice and column indice must be a \':\'");
53 }
54 inline void assert_eof(std::istream& istrm) {
55  if(istrm.eof())
56  throw AbstractLinAlgPack::InputException("Sparse COO matrix input stream error: Premature end to the input file.");
57 }
58 }
59 
60 void AbstractLinAlgPack::read_coo_into_valarrays(std::istream& istrm, size_type& m, size_type& n, size_type& nz
61  , std::valarray<value_type>& a, std::valarray<indice_type>& ivect
62  , std::valarray<indice_type>& jvect)
63 {
64  // read in dimensions and resize
65  istrm >> m; assert_eof(istrm);
66  istrm >> n; assert_eof(istrm);
67  istrm >> nz;
68  a.resize(nz);
69  ivect.resize(nz);
70  jvect.resize(nz);
71 
72  // Read in the non-zero elements
73  value_type *p_a = &a[0],
74  *p_a_last = p_a + nz;
75  indice_type *p_ivect = &ivect[0],
76  *p_jvect = &jvect[0];
77 
78  for(; p_a != p_a_last; ++p_a, ++p_ivect, ++p_jvect) {
79  const int bs = 50;
80  char num[bs];
81  char c;
82  assert_eof(istrm);
83  istrm.get(num, bs-1, ':'); assert_eof(istrm); *p_a = ::atof(num); // Read in ak
84  istrm.get(c); assert_eof(istrm); assert_sep_char(c); // Read in ':'
85  istrm.get(num, bs-1, ':'); assert_eof(istrm); *p_ivect = ::atoi(num);// Read in ik
86  istrm.get(c); assert_eof(istrm); assert_sep_char(c); // Read in ':'
87  istrm >> *p_jvect; // Read in jk
88  }
89 }
90 
91 #endif // 0
Base class for input exceptions (Preconditions).
size_t size_type