source: trunk/c++_tools/utility/stl_utility.h @ 646

Last change on this file since 646 was 646, checked in by Peter, 15 years ago

removing pointer_comare because it is not a pointer_compare but rather a compare_pairvalue

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 4.2 KB
Line 
1// $Id: stl_utility.h 646 2006-09-13 05:04:22Z peter $
2
3/*
4  Copyright (C) 2004 Jari Häkkinen
5  Copyright (C) 2005 Jari Häkkinen, Peter Johansson, Markus Ringnér
6  Copyright (C) 2006 Jari Häkkinen
7
8  This file is part of the thep c++ tools library,
9                                http://lev.thep.lu.se/trac/c++_tools
10
11  The c++ tools library is free software; you can redistribute it
12  and/or modify it under the terms of the GNU General Public License
13  as published by the Free Software Foundation; either version 2 of
14  the License, or (at your option) any later version.
15
16  The c++ tools library is distributed in the hope that it will be
17  useful, but WITHOUT ANY WARRANTY; without even the implied warranty
18  of 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#ifndef _theplu_utility_stl_utility_
28#define _theplu_utility_stl_utility_
29
30///
31/// \file stl_utility.h
32///
33/// There are a number of useful functionality missing in the Standard
34/// Template Library, STL. This file is an effort to provide
35/// extensions to STL functionality.
36///
37
38#include<ostream>
39#include <string>
40#include <utility>
41#include <vector>
42
43namespace std {
44
45  ///
46  /// Print out a pair
47  ///
48  // This is in namespace std because we have not figured out how to have
49  // pair and its operator<< in different namespaces
50  template <class T1, class T2> 
51  std::ostream& operator<<(std::ostream& out, const std::pair<T1,T2>& p) 
52  { out << p.first << "\t" << p.second; return out; }
53
54}
55
56namespace theplu {
57namespace utility {
58
59
60  ///
61  /// STL provides operator< for the pair.first element, but none for
62  /// pair.second. This template provides this and can be used as the
63  /// comparison object in generic functions such as the STL sort.
64  ///
65  template <class T1,class T2>
66  struct pair_value_compare
67  {
68    ///
69    /// @return true if x.second<y.second or (x.second==y.second and
70    /// x.first<y.first)
71    ///
72    inline bool operator()(const std::pair<T1,T2>& x,
73                           const std::pair<T1,T2>& y) {
74      return ((x.second<y.second) ||
75              (!(y.second<x.second) && (x.first<y.first))); 
76    }
77  };
78
79  ///
80  /// Function reading from istream to vector of doubles. Function
81  /// reads the line until next '\\n'. The line is splitted with
82  /// respect to whitespaces and push_backed into the vector. The
83  /// vector is emptied before the reading starts. Unexpected
84  /// characters are currently skipped with a warning message.
85  /// NaN is supported to be a double (case-insensitive)
86  ///
87  /// @return false if end of stream
88  ///
89  /// @note The functionality of this function will change in the
90  /// future. The overall functionality will be the same but the
91  /// outcome of unexpected events will change.
92  ///
93  bool read_to_double(std::istream&, std::vector<double>&);
94
95  ///
96  /// Function reading from istream to vector of ints. Function
97  /// reads the line until next '\\n'. The line is splitted with
98  /// respect to whitespaces and push_backed into the vector. The
99  /// vector is emptied before the reading starts. Unexpected
100  /// characters are currently skipped with a warning message.
101  /// NaN is supported to be an int (case-insensitive)
102  ///
103  /// @return false if end of stream
104  ///
105  /// @note The functionality of this function will change in the
106  /// future. The overall functionality will be the same but the
107  /// outcome of unexpected events will change.
108  ///
109  bool read_to_int(std::istream&, std::vector<int>&);
110
111  ///
112  /// Function reading from istream to vector of strings. Function
113  /// reads the line until next '\\n'. The line is splitted with
114  /// respect to whitespaces and push_backed into the vector. The
115  /// vector is emptied before the reading starts.
116  ///
117  /// @return false if end of stream
118  ///
119  bool read_to_string(std::istream&, std::vector<std::string>&);
120
121  ///
122  /// Function converting a string to lower case
123  ///
124  inline void to_lower(std::string& s) {
125    transform(s.begin(),s.end(), s.begin(), tolower);
126  }
127
128  ///
129  /// Function converting a string to upper case
130  ///
131  inline void to_upper(std::string& s) {
132    transform(s.begin(),s.end(), s.begin(), toupper);
133  }
134
135
136}} // of namespace utility and namespace theplu
137
138#endif
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