ome-common  5.2.0
filesystem.h
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38 
46 #ifndef OME_COMMON_FILESYSTEM_H
47 # define OME_COMMON_FILESYSTEM_H
48 
49 # include <ome/common/config.h>
50 
51 #include <boost/filesystem/operations.hpp>
52 #include <boost/filesystem/path.hpp>
53 
54 // Older versions use get_generic_category() in place of the new
55 // generic_category()
56 # ifdef OME_HAVE_BOOST_FILESYSTEM_CANONICAL
57 # ifdef BOOST_SYSTEM_NO_DEPRECATED
58 # undef BOOST_SYSTEM_NO_DEPRECATED
59 # endif // BOOST_SYSTEM_NO_DEPRECATED
60 # include <boost/system/error_code.hpp>
61 # endif // OME_HAVE_BOOST_FILESYSTEM_CANONICAL
62 
63 namespace ome
64 {
65 
69  namespace common
70  {
71 
72 # ifdef OME_HAVE_BOOST_FILESYSTEM_ABSOLUTE
74 # else // OME_HAVE_BOOST_FILESYSTEM_ABSOLUTE not defined
75 
82  inline
83  boost::filesystem::path
84  absolute(const boost::filesystem::path& p,
85  const boost::filesystem::path& base = boost::filesystem::current_path())
86  {
87  return boost::filesystem::complete(p, base);
88  }
89 # endif // OME_HAVE_BOOST_FILESYSTEM_ABSOLUTE
90 
91 # ifdef OME_HAVE_BOOST_FILESYSTEM_CANONICAL
93 # else // OME_HAVE_BOOST_FILESYSTEM_CANONICAL not defined
94  // Implementation derived from boost 1.55.
103  inline
104  boost::filesystem::path
105  canonical(const boost::filesystem::path& p,
106  const boost::filesystem::path& base = boost::filesystem::current_path(),
107  boost::system::error_code* ec = 0)
108  {
109  boost::filesystem::path source (absolute(p, base));
110  boost::filesystem::path result;
111 
112  boost::system::error_code local_ec;
113  boost::filesystem::file_status stat (status(source, local_ec));
114 
115  if (stat.type() == boost::filesystem::file_not_found)
116  {
117  if (ec == 0)
118  throw boost::filesystem::filesystem_error
119  ("boost::filesystem::canonical", source,
120  boost::system::error_code(boost::system::errc::no_such_file_or_directory,
121  boost::system::get_generic_category()));
122  ec->assign(boost::system::errc::no_such_file_or_directory,
123  boost::system::get_generic_category());
124  return result;
125  }
126  else if (local_ec)
127  {
128  if (ec == 0)
129  throw(boost::filesystem::filesystem_error
130  ("boost::filesystem::canonical", source, local_ec));
131  *ec = local_ec;
132  return result;
133  }
134  }
135 # endif // OME_HAVE_BOOST_FILESYSTEM_CANONICAL
136 
144  inline
145  boost::filesystem::path
146  make_relative(boost::filesystem::path from,
147  boost::filesystem::path to)
148  {
149  from = absolute(from);
150  to = absolute(to);
151  boost::filesystem::path ret;
152  boost::filesystem::path::const_iterator itrFrom(from.begin());
153  boost::filesystem::path::const_iterator itrTo(to.begin());
154 
155  // Find common base
156  for(boost::filesystem::path::const_iterator toEnd(to.end()), fromEnd(from.end());
157  itrFrom != fromEnd && itrTo != toEnd && *itrFrom == *itrTo;
158  ++itrFrom, ++itrTo);
159 
160  // Navigate backwards in directory to reach previously found base
161  for(boost::filesystem::path::const_iterator fromEnd(from.end());
162  itrFrom != fromEnd;
163  ++itrFrom )
164  {
165  if((*itrFrom) != ".")
166  ret /= "..";
167  }
168  // Now navigate down the directory branch
169  for (boost::filesystem::path::iterator begin = itrTo;
170  begin != to.end();
171  ++begin)
172  ret /= *begin;
173 
174  return ret;
175  }
176 
177  }
178 }
179 
180 #endif // OME_COMMON_FILESYSTEM_H
181 
182 /*
183  * Local Variables:
184  * mode:C++
185  * End:
186  */
boost::filesystem::path canonical(const boost::filesystem::path &p, const boost::filesystem::path &base=boost::filesystem::current_path(), boost::system::error_code *ec=0)
Get a canonical path.
Definition: filesystem.h:105
boost::filesystem::path make_relative(boost::filesystem::path from, boost::filesystem::path to)
Make a relative path.
Definition: filesystem.h:146
Definition: boolean.h:48
boost::filesystem::path absolute(const boost::filesystem::path &p, const boost::filesystem::path &base=boost::filesystem::current_path())
Get an absolute path.
Definition: filesystem.h:84