source: trunk/lib/utility.h @ 465

Last change on this file since 465 was 465, checked in by Peter Johansson, 14 years ago

fixes #217. Moving functors to a Functor.h and Functor.cc

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 4.7 KB
Line 
1#ifndef _theplu_svndigest_utility_
2#define _theplu_svndigest_utility_
3
4// $Id: utility.h 465 2007-08-24 13:28:24Z peter $
5
6/*
7  Copyright (C) 2005, 2006, 2007 Jari Häkkinen, Peter Johansson
8
9  This file is part of svndigest, http://trac.thep.lu.se/trac/svndigest
10
11  svndigest is free software; you can redistribute it and/or modify it
12  under the terms of the GNU General Public License as published by
13  the Free Software Foundation; either version 2 of the License, or
14  (at your option) any later version.
15
16  svndigest is distributed in the hope that it will be useful, but
17  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 <algorithm>
28#include <functional>
29#include <iosfwd>
30#include <string>
31#include <utility>
32#include <vector>
33
34#include <sys/stat.h>
35
36namespace theplu{
37namespace svndigest{
38
39  ///
40  /// @brief Check if access permissions match \a mode. \a mode must
41  /// be given as r, w, x, or combinations of these letters.
42  ///
43  /// @return On success (all requested permissions granted), zero
44  /// is returned. On error (at least one bit in mode asked for a
45  /// permission that is denied, or some other error occurred), -1
46  /// is returned, and errno is set appropriately.
47  ///
48  /// @throw An std::runtime_error is thrown when checking for write
49  /// permissions for a file/direcotry that does not exist.
50  ///
51  /// @see access(2)
52  ///
53  int access_rights(const std::string& path,const std::string& bits);
54
55  /**
56     @brief Copy file \a source to \a target.
57
58     @throw std::runtime_error when read error of \a source or write
59     error for \a target is encountered.
60  */
61  void copy_file(const std::string& source, const std::string& target);
62
63  ///
64  /// @return everything after last '/'
65  ///
66  std::string file_name(const std::string&);
67
68  ///
69  /// @brief environment variable @a var
70  ///
71  std::string getenv(const std::string& var); 
72
73  ///
74  /// If @a width is set, size is forced to length @a width. This
75  /// implies, e.g., that hex(15,2) and hex(17,1) return "0F" and "1",
76  /// respectively.
77  ///
78  /// @return x in hexadecimal base
79  ///
80  std::string hex(int x, u_int width=0);
81
82  ///
83  /// @brief remove trailing whitespaces
84  ///
85  std::string htrim(std::string str);
86
87  ///
88  /// @return true if \a str is an integer
89  ///
90  bool is_int(std::string str);
91
92  ///
93  /// @brief remove leading whitespaces
94  ///
95  std::string ltrim(std::string str);
96
97  inline bool match_begin(std::string::const_iterator first, 
98                          std::string::const_iterator last, 
99                          const std::string& str)
100  { return (std::distance(first, last)>=static_cast<int>(str.size()) && 
101            std::equal(str.begin(), str.end(), first)); 
102  }
103
104  inline bool match_end(std::string::const_reverse_iterator first, 
105                        std::string::const_reverse_iterator last, 
106                        const std::string& str)
107  { return (std::distance(first,last)>=static_cast<int>(str.size()) && 
108            std::equal(str.rbegin(), str.rend(), first)); 
109  }
110
111  ///
112  /// Create directory \a dir. The call can fail in many ways, cf. 'man
113  /// mkdir'.
114  ///
115  inline int mkdir(const std::string& dir) { return ::mkdir(dir.c_str(),0777); }
116
117  ///
118  /// @brief Check whether \a path already exists or not.
119  ///
120  /// @return True if \a path exists, false otherwise.
121  ///
122  bool node_exist(const std::string& path);
123
124  /**
125     @return 0 if \a b = 0 otherwise \f$ \frac{100*a}{b} \f$
126  */
127  int percent(int a, int b);
128
129  ///
130  /// @return the current working directory.
131  ///
132  std::string pwd(void);
133
134  ///
135  /// Search finds a subsecuence in [first, last) being identical to @ str
136  ///
137  /// @return iterator pointing to first character in found subsequence
138  ///
139  /// @see std::search
140  ///
141  inline std::string::iterator search(std::string::iterator first, 
142                                      std::string::iterator last, 
143                                      std::string str)
144  { return std::search(first, last, str.begin(), str.end()); }
145
146  ///
147  ///
148  ///
149  time_t str2time(const std::string&);
150
151  ///
152  /// If file does not exist create empty file.
153  ///
154  void touch(std::string);
155
156  ///
157  /// remove leading and trailing whitespaces
158  ///
159  inline std::string trim(std::string str) { return htrim(ltrim(str)); }
160
161
162  template <typename T>
163  std::string match(std::string::const_iterator& first,
164                    const std::string::const_iterator& last,
165                    const T& func)
166  {
167    std::string res;
168    for (;first!=last && func(first); ++first) 
169      res.append(1,*first);
170    return res;
171  }
172
173
174  std::string match(std::string::const_iterator& first,
175                    const std::string::const_iterator& last,
176                    std::string);
177
178}} // end of namespace svndigest end of namespace theplu
179
180#endif
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