source: trunk/yat/utility/VectorView.cc @ 1275

Last change on this file since 1275 was 1275, checked in by Jari Häkkinen, 13 years ago

Updating copyright statements.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 3.3 KB
Line 
1// $Id: VectorView.cc 1275 2008-04-11 06:10:12Z jari $
2
3/*
4  Copyright (C) 2003 Daniel Dalevi, Peter Johansson
5  Copyright (C) 2004 Jari Häkkinen, Peter Johansson
6  Copyright (C) 2005, 2006, 2007 Jari Häkkinen, Peter Johansson, Markus Ringnér
7  Copyright (C) 2008 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    copy(other.gsl_vector_p());
66  }
67
68
69  VectorView::VectorView(VectorMutable& v,size_t offset,size_t n,size_t stride)
70    : VectorMutable()
71  {
72    view_ = 
73      new gsl_vector_view(gsl_vector_subvector_with_stride(v.gsl_vector_p(), 
74                                                           offset, stride,n));
75    const_vec_ = vec_ = &(view_->vector);
76  }
77
78
79  VectorView::VectorView(Matrix& m, size_t i, bool row)
80    : VectorMutable()
81  {
82    view_=new gsl_vector_view(row ?
83                              gsl_matrix_row   (m.gsl_matrix_p(),i) :
84                              gsl_matrix_column(m.gsl_matrix_p(),i)  );
85    const_vec_ = vec_ = &(view_->vector);
86  }
87
88
89  VectorView::VectorView(proxy p)
90    : VectorMutable(), view_(NULL)
91  {
92    copy(p.vec_);
93  }
94
95
96  VectorView::~VectorView(void)
97  {
98    delete_allocated_memory();
99  }
100
101
102  const VectorView& VectorView::assign(const VectorBase& other )
103  {
104    if (size()!=other.size())
105      throw utility::GSL_error("VectorView::assign dimension mis-match");
106    if (!other.size())
107      return *this;
108    if (gsl_vector_memcpy(vec_, other.gsl_vector_p()))
109      throw utility::GSL_error("VectorView::assign memcpy failed.");
110    const_vec_ = vec_;
111    return *this;
112  } 
113
114
115  void VectorView::copy(gsl_vector* other )
116  {
117    view_ = new gsl_vector_view(gsl_vector_subvector(other,0,other->size));
118    const_vec_ = vec_ = &(view_->vector);
119  }
120
121
122  bool VectorView::isview(void) const
123  {
124    return true;
125  }
126
127
128
129  const VectorView& VectorView::operator=(const VectorView& other )
130  {
131    return assign(other);
132  }
133
134 
135  const VectorView& VectorView::operator=(const VectorBase& other )
136  {
137    return assign(other);
138  }
139
140 
141  void VectorView::delete_allocated_memory(void)
142  {
143    if (view_){
144      delete view_;
145      view_=NULL;
146    }
147    const_vec_ = vec_ = NULL;
148  }
149
150
151}}} // of namespace utility, yat, and thep
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