source: trunk/lib/utility.h @ 289

Last change on this file since 289 was 289, checked in by Peter Johansson, 14 years ago

fixed trac link problem. fixes #178 and refs #180. Also changed format of config file.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 6.1 KB
Line 
1#ifndef _theplu_svndigest_utility_
2#define _theplu_svndigest_utility_
3
4// $Id: utility.h 289 2007-05-08 12:48:07Z peter $
5
6/*
7  Copyright (C) 2005, 2006 Jari Häkkinen, Peter Johansson
8  Copyright (C) 2007 Peter Johansson
9
10  This file is part of svndigest, http://lev.thep.lu.se/trac/svndigest
11
12  svndigest is free software; you can redistribute it and/or modify it
13  under the terms of the GNU General Public License as published by
14  the Free Software Foundation; either version 2 of the License, or
15  (at your option) any later version.
16
17  svndigest is distributed in the hope that it will be useful, but
18  WITHOUT ANY WARRANTY; without even the implied warranty of
19  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20  General Public License for more details.
21
22  You should have received a copy of the GNU General Public License
23  along with this program; if not, write to the Free Software
24  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
25  02111-1307, USA.
26*/
27
28#include <algorithm>
29#include <functional>
30#include <iosfwd>
31#include <string>
32#include <utility>
33#include <vector>
34
35#include <sys/stat.h>
36
37namespace theplu{
38namespace svndigest{
39
40  ///
41  /// @brief Check if access permissions match \a mode. \a mode must
42  /// be given as r, w, x, or combinations of these letters.
43  ///
44  /// @return On success (all requested permissions granted), zero
45  /// is returned. On error (at least one bit in mode asked for a
46  /// permission that is denied, or some other error occurred), -1
47  /// is returned, and errno is set appropriately.
48  ///
49  /// @throw An std::runtime_error is thrown when checking for write
50  /// permissions for a file/direcotry that does not exist.
51  ///
52  /// @see access(2)
53  ///
54  int access_rights(const std::string& path,const std::string& bits);
55
56  ///
57  /// @return everything after last '/'
58  ///
59  std::string file_name(const std::string&);
60
61  ///
62  /// @brief environment variable @a var
63  ///
64  std::string getenv(const std::string& var); 
65
66  ///
67  /// @brief remove trailing whitespaces
68  ///
69  std::string htrim(std::string str);
70
71  ///
72  /// @return true if \a str is an integer
73  ///
74  bool is_int(std::string str);
75
76  ///
77  /// @brief remove leading whitespaces
78  ///
79  std::string ltrim(std::string str);
80
81  inline bool match_begin(std::string::const_iterator first, 
82                          std::string::const_iterator last, 
83                          const std::string& str)
84  { return (std::distance(first, last)>=static_cast<int>(str.size()) && 
85            std::equal(str.begin(), str.end(), first)); 
86  }
87
88  inline bool match_end(std::string::const_reverse_iterator first, 
89                        std::string::const_reverse_iterator last, 
90                        const std::string& str)
91  { return (std::distance(first,last)>=static_cast<int>(str.size()) && 
92            std::equal(str.rbegin(), str.rend(), first)); 
93  }
94
95  ///
96  /// Create directory \a dir. The call can fail in many ways, cf. 'man
97  /// mkdir'.
98  ///
99  inline int mkdir(const std::string& dir) { return ::mkdir(dir.c_str(),0777); }
100
101  ///
102  /// @brief Check whether \a path already exists or not.
103  ///
104  /// @return True if \a path exists, false otherwise.
105  ///
106  bool node_exist(const std::string& path);
107
108  ///
109  /// @return the current working directory.
110  ///
111  std::string pwd(void);
112
113  ///
114  /// Search finds a subsecuence in [first, last) being identical to @ str
115  ///
116  /// @return iterator pointing to first character in found subsequence
117  ///
118  /// @see std::search
119  ///
120  inline std::string::iterator search(std::string::iterator first, 
121                                      std::string::iterator last, 
122                                      std::string str)
123  { return std::search(first, last, str.begin(), str.end()); }
124
125  ///
126  ///
127  ///
128  time_t str2time(const std::string&);
129
130  ///
131  /// remove leading and trailing whitespaces
132  ///
133  inline std::string trim(std::string str) { return htrim(ltrim(str)); }
134
135
136  template <class T>
137  std::string match(std::string::const_iterator& first,
138                    const std::string::const_iterator& last,
139                    const T& func)
140  {
141    std::string res;
142    for (;first!=last && func(*first); ++first) 
143      res.append(1,*first);
144    return res;
145  }
146
147  struct Digit
148  {
149    inline bool operator()(char c) const { return isdigit(c); }
150  };
151
152  class notChar
153  {
154  public:
155    notChar(char);
156    inline bool operator()(char c) const { return c!=char_; }
157  private:
158    char char_;
159  };
160
161  class not2Char
162  {
163  public:
164    not2Char(char, char);
165    inline bool operator()(char c) const 
166    { return c!=char1_ && c!=char2_; }
167  private:
168    const char char1_;
169    const char char2_;
170  };
171
172  ///
173  /// @brief Functor comparing pairs using second.
174  ///
175  /// STL provides operator< for the pair.first element, but none for
176  /// pair.second. This template provides this and can be used as the
177  /// comparison object in generic functions such as the STL sort.
178  ///
179  template <class T1,class T2>
180  struct pair_value_compare
181  {
182    ///
183    /// @return true if x.second<y.second or (x.second==y.second and
184    /// x.first<y.first)
185    ///
186    inline bool operator()(const std::pair<T1,T2>& x,
187                           const std::pair<T1,T2>& y) {
188      return ((x.second<y.second) ||
189              (!(y.second<x.second) && (x.first<y.first))); 
190    }
191  };
192
193  ///
194  /// Calculating sum of two vectors.
195  ///
196  /// @return resulting vector
197  ///
198  template <typename T >
199  struct VectorPlus : 
200    public std::binary_function<std::vector<T>,std::vector<T>,std::vector<T> >
201  {
202    std::vector<T> operator()(const std::vector<T>& u,
203                              const std::vector<T>& v) const 
204    {
205      if ( u.size() > v.size() ){
206        std::vector<T> res(u.size());
207        transform(u.begin(), u.end(), v.begin(), res.begin(), std::plus<T>());
208        copy(u.begin()+v.size(), u.end(), res.begin()+v.size());
209        return res;
210      }
211 
212      std::vector<T> res(v.size());
213      transform(v.begin(), v.end(), u.begin(), res.begin(), std::plus<T>());
214      if ( v.size() > u.size() )
215        copy(v.begin()+u.size(), v.end(), res.begin()+u.size());
216      return res;
217    }
218
219  };
220
221  ///
222  /// @return resulting vector
223  ///
224  template <typename Key, typename T>
225  struct PairValuePlus :
226    public std::binary_function<std::vector<T>,
227                                std::pair<const Key, std::vector<T> >, 
228                                std::vector<T> >
229  {
230    std::vector<T> operator()(const std::vector<T>& sum, 
231                              const std::pair<const Key,std::vector<T> >& p)
232    {
233      return VectorPlus<T>()(sum, p.second);
234    }
235  };
236
237}} // end of namespace svndigest end of namespace theplu
238
239#endif
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