external_libraries/boost/libs/filesystem/v2/src/v2_portability.cpp

   1 //  portability.cpp  ---------------------------------------------------------//
   2
   3 //  Copyright 2002-2005 Beman Dawes
   4 //  Use, modification, and distribution is subject to the Boost Software
   5 //  License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy
   6 //  at http://www.boost.org/LICENSE_1_0.txt)
   7
   8 //  See library home page at http://www.boost.org/libs/filesystem
   9
  10 //----------------------------------------------------------------------------//
  11
  12 // define BOOST_FILESYSTEM_SOURCE so that <boost/filesystem/config.hpp> knows
  13 // the library is being built (possibly exporting rather than importing code)
  14 #define BOOST_FILESYSTEM_SOURCE
  15
  16 #ifndef BOOST_SYSTEM_NO_DEPRECATED
  17 # define BOOST_SYSTEM_NO_DEPRECATED
  18 #endif
  19
  20 #include <boost/filesystem/v2/config.hpp>
  21 #include <boost/filesystem/v2/path.hpp>
  22
  23 namespace fs = boost::filesystem2;
  24
  25 #include <cstring> // SGI MIPSpro compilers need this
  26
  27 # ifdef BOOST_NO_STDC_NAMESPACE
  28     namespace std { using ::strerror; }
  29 # endif
  30
  31 //----------------------------------------------------------------------------//
  32
  33 namespace
  34 {
  35   const char invalid_chars[] =
  36     "\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F"
  37     "\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F"
  38     "<>:\"/\\|";
  39   // note that the terminating '\0' is part of the string - thus the size below
  40   // is sizeof(invalid_chars) rather than sizeof(invalid_chars)-1.  I
  41   const std::string windows_invalid_chars( invalid_chars, sizeof(invalid_chars) );
  42
  43   const std::string valid_posix(
  44     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._-" );
  45
  46 } // unnamed namespace
  47
  48 namespace boost
  49 {
  50   namespace filesystem2
  51   {
  52
  53     //  name_check functions  ----------------------------------------------//
  54
  55 #   ifdef BOOST_WINDOWS
  56     BOOST_FILESYSTEM_DECL bool native( const std::string & name )
  57     {
  58       return windows_name( name );
  59     }
  60 #   else
  61     BOOST_FILESYSTEM_DECL bool native( const std::string & name )
  62     {
  63       return  name.size() != 0
  64         && name[0] != ' '
  65         && name.find('/') == std::string::npos;
  66     }
  67 #   endif
  68
  69     BOOST_FILESYSTEM_DECL bool portable_posix_name( const std::string & name )
  70     {
  71       return name.size() != 0
  72         && name.find_first_not_of( valid_posix ) == std::string::npos;
  73     }
  74
  75     BOOST_FILESYSTEM_DECL bool windows_name( const std::string & name )
  76     {
  77       return name.size() != 0
  78         && name[0] != ' '
  79         && name.find_first_of( windows_invalid_chars ) == std::string::npos
  80         && *(name.end()-1) != ' '
  81         && (*(name.end()-1) != '.'
  82           || name.length() == 1 || name == "..");
  83     }
  84
  85     BOOST_FILESYSTEM_DECL bool portable_name( const std::string & name )
  86     {
  87       return
  88         name.size() != 0
  89         && ( name == "."
  90           || name == ".."
  91           || (windows_name( name )
  92             && portable_posix_name( name )
  93             && name[0] != '.' && name[0] != '-'));
  94     }
  95
  96     BOOST_FILESYSTEM_DECL bool portable_directory_name( const std::string & name )
  97     {
  98       return
  99         name == "."
 100         || name == ".."
 101         || (portable_name( name )
 102           && name.find('.') == std::string::npos);
 103     }
 104
 105     BOOST_FILESYSTEM_DECL bool portable_file_name( const std::string & name )
 106     {
 107       std::string::size_type pos;
 108       return
 109          portable_name( name )
 110          && name != "."
 111          && name != ".."
 112          && ( (pos = name.find( '.' )) == std::string::npos
 113              || (name.find( '.', pos+1 ) == std::string::npos
 114                && (pos + 5) > name.length() ))
 115         ;
 116     }
 117
 118   } // namespace filesystem2
 119 } // namespace boost