source: trunk/yat/utility/VectorView.cc @ 1027

Last change on this file since 1027 was 1027, checked in by Peter, 14 years ago

going back to previous design in which view and const_view are in different classes. Having them in same didnt work as expected. There is a problem converting vector::iterator to vector::const_iterator. I'll open a separate ticket for this issue.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 3.2 KB
Line 
1// $Id: VectorView.cc 1027 2008-02-02 21:29:29Z peter $
2
3/*
4  Copyright (C) 2003 Daniel Dalevi, Peter Johansson
5  Copyright (C) 2004 Jari Häkkinen, Peter Johansson
6  Copyright (C) 2005, 2006 Jari Häkkinen, Markus Ringnér, Peter Johansson
7  Copyright (C) 2007 Jari Häkkinen, Peter Johansson
8
9  This file is part of the yat library, http://trac.thep.lu.se/trac/yat
10
11  The yat library is free software; you can redistribute it and/or
12  modify it under the terms of the GNU General Public License as
13  published by the Free Software Foundation; either version 2 of the
14  License, or (at your option) any later version.
15
16  The yat library is distributed in the hope that it will be useful,
17  but WITHOUT ANY WARRANTY; without even the implied warranty of
18  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  General Public License for more details.
20
21  You should have received a copy of the GNU General Public License
22  along with this program; if not, write to the Free Software
23  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
24  02111-1307, USA.
25*/
26
27#include "VectorView.h"
28#include "VectorMutable.h"
29#include "matrix.h"
30#include "utility.h"
31#include "yat/random/random.h"
32
33#include <algorithm>
34#include <cassert>
35#include <cmath>
36#include <iostream>
37#include <sstream>
38#include <utility>
39#include <vector>
40
41namespace theplu {
42namespace yat {
43namespace utility {
44
45
46  VectorView::VectorView(void)
47    : VectorMutable(), view_(NULL)
48  {
49  }
50
51
52  VectorView::VectorView(VectorView& other)
53    : VectorMutable()
54  {
55    view_ = new gsl_vector_view(gsl_vector_subvector(other.gsl_vector_p(), 
56                                                     0, other.size()));
57    const_vec_ = vec_ = &(view_->vector);
58   
59  }
60
61
62  VectorView::VectorView(VectorMutable& other)
63    : VectorMutable()
64  {
65    view_ = new gsl_vector_view(gsl_vector_subvector(other.gsl_vector_p(), 
66                                                     0,other.size()));
67    const_vec_ = vec_ = &(view_->vector);
68  }
69
70
71  VectorView::VectorView(VectorMutable& v,size_t offset,size_t n,size_t stride)
72    : VectorMutable()
73  {
74    view_ = 
75      new gsl_vector_view(gsl_vector_subvector_with_stride(v.gsl_vector_p(), 
76                                                           offset, stride,n));
77    const_vec_ = vec_ = &(view_->vector);
78  }
79
80
81  VectorView::VectorView(matrix& m, size_t i, bool row)
82    : VectorMutable()
83  {
84    view_=new gsl_vector_view(row ?
85                              gsl_matrix_row   (m.gsl_matrix_p(),i) :
86                              gsl_matrix_column(m.gsl_matrix_p(),i)  );
87    const_vec_ = vec_ = &(view_->vector);
88  }
89
90
91  VectorView::VectorView(proxy p)
92    : VectorMutable(p.vec_), view_(NULL)
93  {
94  }
95
96
97  VectorView::~VectorView(void)
98  {
99    delete_allocated_memory();
100  }
101
102
103  const VectorView& VectorView::assign(const VectorBase& other )
104  {
105    if (size()!=other.size())
106      throw utility::GSL_error("VectorView::dimension mis-match");
107    if (!other.size())
108      return *this;
109    gsl_vector_memcpy(vec_, other.gsl_vector_p());
110    const_vec_ = vec_;
111    return *this;
112  } 
113
114
115  bool VectorView::isview(void) const
116  {
117    return true;
118  }
119
120
121
122  const VectorView& VectorView::operator=(const VectorView& other )
123  {
124    return assign(other);
125  }
126
127 
128  const VectorView& VectorView::operator=(const VectorBase& other )
129  {
130    return assign(other);
131  }
132
133 
134  void VectorView::delete_allocated_memory(void)
135  {
136    if (view_){
137      delete view_;
138      view_=NULL;
139    }
140    const_vec_ = vec_ = NULL;
141  }
142
143
144}}} // of namespace utility, yat, and thep
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