//  portability.cpp  ---------------------------------------------------------////  Copyright 2002-2005 Beman Dawes//  Use, modification, and distribution is subject to the Boost Software//  License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy//  at http://www.boost.org/LICENSE_1_0.txt)//  See library home page at http://www.boost.org/libs/filesystem//----------------------------------------------------------------------------// // define BOOST_FILESYSTEM_SOURCE so that <boost/filesystem/config.hpp> knows// the library is being built (possibly exporting rather than importing code)#define BOOST_FILESYSTEM_SOURCE #include <boost/filesystem/config.hpp>#include <boost/filesystem/path.hpp>namespace fs = boost::filesystem;#include <cstring> // SGI MIPSpro compilers need this# ifdef BOOST_NO_STDC_NAMESPACE    namespace std { using ::strerror; }# endif//----------------------------------------------------------------------------//namespace{  const char invalid_chars[] =    "\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F"    "\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F"    "<>:\"/\\|";  // note that the terminating '\0' is part of the string - thus the size below  // is sizeof(invalid_chars) rather than sizeof(invalid_chars)-1.  I   const std::string windows_invalid_chars( invalid_chars, sizeof(invalid_chars) );  const std::string valid_posix(    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._-" );} // unnamed namespacenamespace boost{  namespace filesystem  {    //  name_check functions  ----------------------------------------------//#   ifdef BOOST_WINDOWS    BOOST_FILESYSTEM_DECL bool native( const std::string & name )    {      return windows_name( name );    }#   else    BOOST_FILESYSTEM_DECL bool native( const std::string & name )    {      return name.find('/') == std::string::npos;    }#   endif    BOOST_FILESYSTEM_DECL bool portable_posix_name( const std::string & name )    {      return name.size() != 0        && name.find_first_not_of( valid_posix ) == std::string::npos;         }    BOOST_FILESYSTEM_DECL bool windows_name( const std::string & name )    {      return name.size() != 0        && name.find_first_of( windows_invalid_chars ) == std::string::npos        && *(name.end()-1) != ' '        && (*(name.end()-1) != '.'          || name.length() == 1 || name == "..");    }    BOOST_FILESYSTEM_DECL bool portable_name( const std::string & name )    {      return        name.size() == 0        || name == "."        || name == ".."        || (windows_name( name )        && portable_posix_name( name )        && name[0] != '.' && name[0] != '-');    }    BOOST_FILESYSTEM_DECL bool portable_directory_name( const std::string & name )    {      return        name == "."        || name == ".."        || (portable_name( name )          && name.find('.') == std::string::npos);    }    BOOST_FILESYSTEM_DECL bool portable_file_name( const std::string & name )    {      std::string::size_type pos;      return         name == "."        || name == ".."        || (portable_name( name )          && ( (pos = name.find( '.' )) == std::string::npos            || (name.find( '.', pos+1 )== std::string::npos              && (pos + 5) > name.length() )))        ;    }  } // namespace filesystem} // namespace boost