source: trunk/yat/utility/Index.cc @ 1486

Last change on this file since 1486 was 1486, checked in by Jari Häkkinen, 13 years ago

Addresses #436.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.0 KB
Line 
1// $Id: Index.cc 1486 2008-09-09 21:17:19Z jari $
2
3/*
4  Copyright (C) 2008 Peter Johansson
5
6  This file is part of the yat library, http://dev.thep.lu.se/yat
7
8  The yat library is free software; you can redistribute it and/or
9  modify it under the terms of the GNU General Public License as
10  published by the Free Software Foundation; either version 3 of the
11  License, or (at your option) any later version.
12
13  The yat library is distributed in the hope that it will be useful,
14  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  General Public License for more details.
17
18  You should have received a copy of the GNU General Public License
19  along with this program; if not, write to the Free Software
20  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
21  02111-1307, USA.
22*/
23
24#include "Index.h"
25
26#include <cassert>
27
28namespace theplu {
29namespace yat {
30namespace utility { 
31
32  Index::Index(void)
33    : index_(SmartPtr<const std::vector<size_t> >(new std::vector<size_t>))
34  {}
35
36
37  Index::Index(size_t n)
38  {
39    std::vector<size_t>* vec = new std::vector<size_t>;
40    vec->reserve(n);
41    for (size_t i=0; i<n; ++i)
42      vec->push_back(i);
43    index_ = SmartPtr<const std::vector<size_t> >(vec);
44  }
45
46
47  Index::Index(const SmartPtr<const std::vector<size_t> >& sp)
48    : index_(sp) {}
49
50
51  Index::Index(const std::vector<size_t>& vec)
52    : index_(utility::SmartPtr<const std::vector<size_t> >
53             (new std::vector<size_t>(vec))) 
54  {}
55
56
57  Index::Index(const Index& a, const Index& b)
58  {
59    std::vector<size_t>* vec = new std::vector<size_t>;
60    vec->reserve(b.size());
61    for (size_t i=0; i<b.size(); ++i) {
62      assert(b[i]<a.size());
63      vec->push_back(a[b[i]]);
64    }
65    index_ = SmartPtr<const std::vector<size_t> >(vec);
66  }
67
68
69  size_t Index::size(void) const
70  {
71    return index_->size();
72  }
73
74
75  const std::vector<size_t>& Index::vector(void) const
76  {
77    return *index_;
78  }
79
80
81  const size_t& Index::operator[](size_t i) const
82  {
83    return (*index_)[i];
84  }
85
86}}} // of namespace utility, yat, and theplu
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