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+// boost/filesystem/path.hpp -----------------------------------------------//
+
+// Copyright Beman Dawes 2002-2005
+// Copyright Vladimir Prus 2002
+
+// Distributed under 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
+
+// basic_path's stem(), extension(), and replace_extension() are based on
+// basename(), extension(), and change_extension() from the original
+// filesystem/convenience.hpp header by Vladimir Prus.
+
+//----------------------------------------------------------------------------//
+
+#ifndef BOOST_FILESYSTEM_PATH_HPP
+#define BOOST_FILESYSTEM_PATH_HPP
+
+#include <boost/filesystem/config.hpp>
+#include <boost/system/system_error.hpp>
+#include <boost/iterator/iterator_facade.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <boost/static_assert.hpp>
+
+#include <string>
+#include <algorithm> // for lexicographical_compare
+#include <iosfwd> // needed by basic_path inserter and extractor
+#include <stdexcept>
+#include <cassert>
+
+# ifndef BOOST_FILESYSTEM_NARROW_ONLY
+# include <locale>
+# endif
+
+#include <boost/config/abi_prefix.hpp> // must be the last #include
+
+//----------------------------------------------------------------------------//
+
+namespace boost
+{
+ namespace BOOST_FILESYSTEM_NAMESPACE
+ {
+ template<class String, class Traits> class basic_path;
+
+ struct path_traits;
+ typedef basic_path< std::string, path_traits > path;
+
+ struct path_traits
+ {
+ typedef std::string internal_string_type;
+ typedef std::string external_string_type;
+ static external_string_type to_external( const path &,
+ const internal_string_type & src ) { return src; }
+ static internal_string_type to_internal(
+ const external_string_type & src ) { return src; }
+ };
+
+# ifndef BOOST_FILESYSTEM_NARROW_ONLY
+
+ struct BOOST_FILESYSTEM_DECL wpath_traits;
+
+ typedef basic_path< std::wstring, wpath_traits > wpath;
+
+ struct BOOST_FILESYSTEM_DECL wpath_traits
+ {
+ typedef std::wstring internal_string_type;
+# ifdef BOOST_WINDOWS_API
+ typedef std::wstring external_string_type;
+ static external_string_type to_external( const wpath &,
+ const internal_string_type & src ) { return src; }
+ static internal_string_type to_internal(
+ const external_string_type & src ) { return src; }
+# else
+ typedef std::string external_string_type;
+ static external_string_type to_external( const wpath & ph,
+ const internal_string_type & src );
+ static internal_string_type to_internal(
+ const external_string_type & src );
+# endif
+ static void imbue( const std::locale & loc );
+ static bool imbue( const std::locale & loc, const std::nothrow_t & );
+ };
+
+# endif // ifndef BOOST_FILESYSTEM_NARROW_ONLY
+
+ // path traits ---------------------------------------------------------//
+
+ template<class Path> struct is_basic_path
+ { BOOST_STATIC_CONSTANT( bool, value = false ); };
+ template<> struct is_basic_path<path>
+ { BOOST_STATIC_CONSTANT( bool, value = true ); };
+# ifndef BOOST_FILESYSTEM_NARROW_ONLY
+ template<> struct is_basic_path<wpath>
+ { BOOST_STATIC_CONSTANT( bool, value = true ); };
+# endif
+
+ // These only have to be specialized if Path::string_type::value_type
+ // is not convertible from char, although specializations may eliminate
+ // compiler warnings. See ticket 2543.
+ template<class Path> struct slash
+ { BOOST_STATIC_CONSTANT( char, value = '/' ); };
+
+ template<class Path> struct dot
+ { BOOST_STATIC_CONSTANT( char, value = '.' ); };
+
+ template<class Path> struct colon
+ { BOOST_STATIC_CONSTANT( char, value = ':' ); };
+
+# ifndef BOOST_FILESYSTEM_NARROW_ONLY
+ template<> struct slash<wpath>
+ { BOOST_STATIC_CONSTANT( wchar_t, value = L'/' ); };
+ template<> struct dot<wpath>
+ { BOOST_STATIC_CONSTANT( wchar_t, value = L'.' ); };
+ template<> struct colon<wpath>
+ { BOOST_STATIC_CONSTANT( wchar_t, value = L':' ); };
+# endif
+
+# ifdef BOOST_WINDOWS_PATH
+ template<class Path> struct path_alt_separator
+ { BOOST_STATIC_CONSTANT( char, value = '\\' ); };
+# ifndef BOOST_FILESYSTEM_NARROW_ONLY
+ template<> struct path_alt_separator<wpath>
+ { BOOST_STATIC_CONSTANT( wchar_t, value = L'\\' ); };
+# endif
+# endif
+
+ // workaround for VC++ 7.0 and earlier issues with nested classes
+ namespace detail
+ {
+ template<class Path>
+ class iterator_helper
+ {
+ public:
+ typedef typename Path::iterator iterator;
+ static void do_increment( iterator & ph );
+ static void do_decrement( iterator & ph );
+ };
+ }
+
+ // basic_path ----------------------------------------------------------//
+
+ template<class String, class Traits>
+ class basic_path
+ {
+ // invariant: m_path valid according to the portable generic path grammar
+
+ // validate template arguments
+// TODO: get these working
+// BOOST_STATIC_ASSERT( ::boost::is_same<String,typename Traits::internal_string_type>::value );
+// BOOST_STATIC_ASSERT( ::boost::is_same<typename Traits::external_string_type,std::string>::value || ::boost::is_same<typename Traits::external_string_type,std::wstring>::value );
+
+ public:
+ // compiler generates copy constructor and copy assignment
+
+ typedef basic_path<String, Traits> path_type;
+ typedef String string_type;
+ typedef typename String::value_type value_type;
+ typedef Traits traits_type;
+ typedef typename Traits::external_string_type external_string_type;
+
+ // constructors/destructor
+ basic_path() {}
+ basic_path( const string_type & s ) { operator/=( s ); }
+ basic_path( const value_type * s ) { operator/=( s ); }
+# ifndef BOOST_NO_MEMBER_TEMPLATES
+ template <class InputIterator>
+ basic_path( InputIterator first, InputIterator last )
+ { append( first, last ); }
+# endif
+ ~basic_path() {}
+
+ // assignments
+ basic_path & operator=( const string_type & s )
+ {
+# if BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, >= 310)
+ m_path.clear();
+# else
+ m_path.erase( m_path.begin(), m_path.end() );
+# endif
+ operator/=( s );
+ return *this;
+ }
+ basic_path & operator=( const value_type * s )
+ {
+# if BOOST_WORKAROUND(BOOST_DINKUMWARE_STDLIB, >= 310)
+ m_path.clear();
+# else
+ m_path.erase( m_path.begin(), m_path.end() );
+# endif
+ operator/=( s );
+ return *this;
+ }
+# ifndef BOOST_NO_MEMBER_TEMPLATES
+ template <class InputIterator>
+ basic_path & assign( InputIterator first, InputIterator last )
+ { m_path.clear(); append( first, last ); return *this; }
+# endif
+
+ // modifiers
+ basic_path & operator/=( const basic_path & rhs ) { return operator /=( rhs.string().c_str() ); }
+ basic_path & operator/=( const string_type & rhs ) { return operator /=( rhs.c_str() ); }
+ basic_path & operator/=( const value_type * s );
+# ifndef BOOST_NO_MEMBER_TEMPLATES
+ template <class InputIterator>
+ basic_path & append( InputIterator first, InputIterator last );
+# endif
+
+ void swap( basic_path & rhs )
+ {
+ m_path.swap( rhs.m_path );
+# ifdef BOOST_CYGWIN_PATH
+ std::swap( m_cygwin_root, rhs.m_cygwin_root );
+# endif
+ }
+
+ basic_path & remove_filename();
+ basic_path & replace_extension( const string_type & new_extension = string_type() );
+
+# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
+ basic_path & remove_leaf() { return remove_filename(); }
+# endif
+
+ // observers
+ const string_type & string() const { return m_path; }
+ const string_type file_string() const;
+ const string_type directory_string() const { return file_string(); }
+
+ const external_string_type external_file_string() const { return Traits::to_external( *this, file_string() ); }
+ const external_string_type external_directory_string() const { return Traits::to_external( *this, directory_string() ); }
+
+ basic_path root_path() const;
+ string_type root_name() const;
+ string_type root_directory() const;
+ basic_path relative_path() const;
+ basic_path parent_path() const;
+ string_type filename() const;
+ string_type stem() const;
+ string_type extension() const;
+
+# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
+ string_type leaf() const { return filename(); }
+ basic_path branch_path() const { return parent_path(); }
+ bool has_leaf() const { return !m_path.empty(); }
+ bool has_branch_path() const { return !parent_path().empty(); }
+# endif
+
+ bool empty() const { return m_path.empty(); } // name consistent with std containers
+ bool is_complete() const;
+ bool has_root_path() const;
+ bool has_root_name() const;
+ bool has_root_directory() const;
+ bool has_relative_path() const { return !relative_path().empty(); }
+ bool has_filename() const { return !m_path.empty(); }
+ bool has_parent_path() const { return !parent_path().empty(); }
+
+ // iterators
+ class iterator : public boost::iterator_facade<
+ iterator,
+ string_type const,
+ boost::bidirectional_traversal_tag >
+ {
+ private:
+ friend class boost::iterator_core_access;
+ friend class boost::BOOST_FILESYSTEM_NAMESPACE::basic_path<String, Traits>;
+
+ const string_type & dereference() const
+ { return m_name; }
+ bool equal( const iterator & rhs ) const
+ { return m_path_ptr == rhs.m_path_ptr && m_pos == rhs.m_pos; }
+
+ friend class boost::BOOST_FILESYSTEM_NAMESPACE::detail::iterator_helper<path_type>;
+
+ void increment()
+ {
+ boost::BOOST_FILESYSTEM_NAMESPACE::detail::iterator_helper<path_type>::do_increment(
+ *this );
+ }
+ void decrement()
+ {
+ boost::BOOST_FILESYSTEM_NAMESPACE::detail::iterator_helper<path_type>::do_decrement(
+ *this );
+ }
+
+ string_type m_name; // current element
+ const basic_path * m_path_ptr; // path being iterated over
+ typename string_type::size_type m_pos; // position of name in
+ // path_ptr->string(). The
+ // end() iterator is indicated by
+ // pos == path_ptr->m_path.size()
+ }; // iterator
+
+ typedef iterator const_iterator;
+
+ iterator begin() const;
+ iterator end() const;
+
+ private:
+ // Note: This is an implementation for POSIX and Windows, where there
+ // are only minor differences between generic and native path grammars.
+ // Private members might be quite different in other implementations,
+ // particularly where there were wide differences between portable and
+ // native path formats, or between file_string() and
+ // directory_string() formats, or simply that the implementation
+ // was willing expend additional memory to achieve greater speed for
+ // some operations at the expense of other operations.
+
+ string_type m_path; // invariant: portable path grammar
+ // on Windows, backslashes converted to slashes
+
+# ifdef BOOST_CYGWIN_PATH
+ bool m_cygwin_root; // if present, m_path[0] was slash. note: initialization
+ // done by append
+# endif
+
+ void m_append_separator_if_needed();
+ void m_append( value_type value ); // converts Windows alt_separator
+
+ // Was qualified; como433beta8 reports:
+ // warning #427-D: qualified name is not allowed in member declaration
+ friend class iterator;
+ friend class boost::BOOST_FILESYSTEM_NAMESPACE::detail::iterator_helper<path_type>;
+
+ // Deprecated features ease transition for existing code. Don't use these
+ // in new code.
+# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
+ public:
+ typedef bool (*name_check)( const std::string & name );
+ basic_path( const string_type & str, name_check ) { operator/=( str ); }
+ basic_path( const typename string_type::value_type * s, name_check )
+ { operator/=( s );}
+ string_type native_file_string() const { return file_string(); }
+ string_type native_directory_string() const { return directory_string(); }
+ static bool default_name_check_writable() { return false; }
+ static void default_name_check( name_check ) {}
+ static name_check default_name_check() { return 0; }
+ basic_path & canonize();
+ basic_path & normalize();
+# endif
+ };
+
+ // basic_path non-member functions ---------------------------------------//
+
+ template< class String, class Traits >
+ inline void swap( basic_path<String, Traits> & lhs,
+ basic_path<String, Traits> & rhs ) { lhs.swap( rhs ); }
+
+ template< class String, class Traits >
+ bool operator<( const basic_path<String, Traits> & lhs, const basic_path<String, Traits> & rhs )
+ {
+ return std::lexicographical_compare(
+ lhs.begin(), lhs.end(), rhs.begin(), rhs.end() );
+ }
+
+ template< class String, class Traits >
+ bool operator<( const typename basic_path<String, Traits>::string_type::value_type * lhs,
+ const basic_path<String, Traits> & rhs )
+ {
+ basic_path<String, Traits> tmp( lhs );
+ return std::lexicographical_compare(
+ tmp.begin(), tmp.end(), rhs.begin(), rhs.end() );
+ }
+
+ template< class String, class Traits >
+ bool operator<( const typename basic_path<String, Traits>::string_type & lhs,
+ const basic_path<String, Traits> & rhs )
+ {
+ basic_path<String, Traits> tmp( lhs );
+ return std::lexicographical_compare(
+ tmp.begin(), tmp.end(), rhs.begin(), rhs.end() );
+ }
+
+ template< class String, class Traits >
+ bool operator<( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type::value_type * rhs )
+ {
+ basic_path<String, Traits> tmp( rhs );
+ return std::lexicographical_compare(
+ lhs.begin(), lhs.end(), tmp.begin(), tmp.end() );
+ }
+
+ template< class String, class Traits >
+ bool operator<( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type & rhs )
+ {
+ basic_path<String, Traits> tmp( rhs );
+ return std::lexicographical_compare(
+ lhs.begin(), lhs.end(), tmp.begin(), tmp.end() );
+ }
+
+ // operator == uses string compare rather than !(lhs < rhs) && !(rhs < lhs) because
+ // the result is the same yet the direct string compare is much more efficient that
+ // lexicographical_compare, and lexicographical_compare used twice at that.
+
+ template< class String, class Traits >
+ inline bool operator==( const basic_path<String, Traits> & lhs, const basic_path<String, Traits> & rhs )
+ {
+ return lhs.string() == rhs.string();
+ }
+
+ template< class String, class Traits >
+ inline bool operator==( const typename basic_path<String, Traits>::string_type::value_type * lhs,
+ const basic_path<String, Traits> & rhs )
+ {
+ return lhs == rhs.string();
+ }
+
+ template< class String, class Traits >
+ inline bool operator==( const typename basic_path<String, Traits>::string_type & lhs,
+ const basic_path<String, Traits> & rhs )
+ {
+ return lhs == rhs.string();
+ }
+
+ template< class String, class Traits >
+ inline bool operator==( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type::value_type * rhs )
+ {
+ return lhs.string() == rhs;
+ }
+
+ template< class String, class Traits >
+ inline bool operator==( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type & rhs )
+ {
+ return lhs.string() == rhs;
+ }
+
+ template< class String, class Traits >
+ inline bool operator!=( const basic_path<String, Traits> & lhs,
+ const basic_path<String, Traits> & rhs )
+ { return !(lhs == rhs); }
+
+ template< class String, class Traits >
+ inline bool operator!=( const typename basic_path<String,
+ Traits>::string_type::value_type * lhs,
+ const basic_path<String, Traits> & rhs )
+ { return !(lhs == rhs); }
+
+ template< class String, class Traits >
+ inline bool operator!=( const typename basic_path<String, Traits>::string_type & lhs,
+ const basic_path<String, Traits> & rhs )
+ { return !(lhs == rhs); }
+
+ template< class String, class Traits >
+ inline bool operator!=( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type::value_type * rhs )
+ { return !(lhs == rhs); }
+
+ template< class String, class Traits >
+ inline bool operator!=( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type & rhs )
+ { return !(lhs == rhs); }
+
+ template< class String, class Traits >
+ inline bool operator>( const basic_path<String, Traits> & lhs, const basic_path<String, Traits> & rhs ) { return rhs < lhs; }
+
+ template< class String, class Traits >
+ inline bool operator>( const typename basic_path<String, Traits>::string_type::value_type * lhs,
+ const basic_path<String, Traits> & rhs ) { return rhs < basic_path<String, Traits>(lhs); }
+
+ template< class String, class Traits >
+ inline bool operator>( const typename basic_path<String, Traits>::string_type & lhs,
+ const basic_path<String, Traits> & rhs ) { return rhs < basic_path<String, Traits>(lhs); }
+
+ template< class String, class Traits >
+ inline bool operator>( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type::value_type * rhs )
+ { return basic_path<String, Traits>(rhs) < lhs; }
+
+ template< class String, class Traits >
+ inline bool operator>( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type & rhs )
+ { return basic_path<String, Traits>(rhs) < lhs; }
+
+ template< class String, class Traits >
+ inline bool operator<=( const basic_path<String, Traits> & lhs, const basic_path<String, Traits> & rhs ) { return !(rhs < lhs); }
+
+ template< class String, class Traits >
+ inline bool operator<=( const typename basic_path<String, Traits>::string_type::value_type * lhs,
+ const basic_path<String, Traits> & rhs ) { return !(rhs < basic_path<String, Traits>(lhs)); }
+
+ template< class String, class Traits >
+ inline bool operator<=( const typename basic_path<String, Traits>::string_type & lhs,
+ const basic_path<String, Traits> & rhs ) { return !(rhs < basic_path<String, Traits>(lhs)); }
+
+ template< class String, class Traits >
+ inline bool operator<=( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type::value_type * rhs )
+ { return !(basic_path<String, Traits>(rhs) < lhs); }
+
+ template< class String, class Traits >
+ inline bool operator<=( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type & rhs )
+ { return !(basic_path<String, Traits>(rhs) < lhs); }
+
+ template< class String, class Traits >
+ inline bool operator>=( const basic_path<String, Traits> & lhs, const basic_path<String, Traits> & rhs ) { return !(lhs < rhs); }
+
+ template< class String, class Traits >
+ inline bool operator>=( const typename basic_path<String, Traits>::string_type::value_type * lhs,
+ const basic_path<String, Traits> & rhs ) { return !(lhs < basic_path<String, Traits>(rhs)); }
+
+ template< class String, class Traits >
+ inline bool operator>=( const typename basic_path<String, Traits>::string_type & lhs,
+ const basic_path<String, Traits> & rhs ) { return !(lhs < basic_path<String, Traits>(rhs)); }
+
+ template< class String, class Traits >
+ inline bool operator>=( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type::value_type * rhs )
+ { return !(basic_path<String, Traits>(lhs) < rhs); }
+
+ template< class String, class Traits >
+ inline bool operator>=( const basic_path<String, Traits> & lhs,
+ const typename basic_path<String, Traits>::string_type & rhs )
+ { return !(basic_path<String, Traits>(lhs) < rhs); }
+
+ // operator /
+
+ template< class String, class Traits >
+ inline basic_path<String, Traits> operator/(
+ const basic_path<String, Traits> & lhs,
+ const basic_path<String, Traits> & rhs )
+ { return basic_path<String, Traits>( lhs ) /= rhs; }
+
+ template< class String, class Traits >
+ inline basic_path<String, Traits> operator/(
+ const basic_path<String, Traits> & lhs,
+ const typename String::value_type * rhs )
+ { return basic_path<String, Traits>( lhs ) /=
+ basic_path<String, Traits>( rhs ); }
+
+ template< class String, class Traits >
+ inline basic_path<String, Traits> operator/(
+ const basic_path<String, Traits> & lhs, const String & rhs )
+ { return basic_path<String, Traits>( lhs ) /=
+ basic_path<String, Traits>( rhs ); }
+
+ template< class String, class Traits >
+ inline basic_path<String, Traits> operator/(
+ const typename String::value_type * lhs,
+ const basic_path<String, Traits> & rhs )
+ { return basic_path<String, Traits>( lhs ) /= rhs; }
+
+ template< class String, class Traits >
+ inline basic_path<String, Traits> operator/(
+ const String & lhs, const basic_path<String, Traits> & rhs )
+ { return basic_path<String, Traits>( lhs ) /= rhs; }
+
+ // inserters and extractors --------------------------------------------//
+
+// bypass VC++ 7.0 and earlier, and broken Borland compilers
+# if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300) && !BOOST_WORKAROUND(__BORLANDC__, < 0x610)
+ template< class Path >
+ std::basic_ostream< typename Path::string_type::value_type,
+ typename Path::string_type::traits_type > &
+ operator<<
+ ( std::basic_ostream< typename Path::string_type::value_type,
+ typename Path::string_type::traits_type >& os, const Path & ph )
+ {
+ os << ph.string();
+ return os;
+ }
+
+ template< class Path >
+ std::basic_istream< typename Path::string_type::value_type,
+ typename Path::string_type::traits_type > &
+ operator>>
+ ( std::basic_istream< typename Path::string_type::value_type,
+ typename Path::string_type::traits_type >& is, Path & ph )
+ {
+ typename Path::string_type str;
+ is >> str;
+ ph = str;
+ return is;
+ }
+# elif BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
+ template< class String, class Traits >
+ std::basic_ostream< BOOST_DEDUCED_TYPENAME String::value_type,
+ BOOST_DEDUCED_TYPENAME String::traits_type > &
+ operator<<
+ ( std::basic_ostream< BOOST_DEDUCED_TYPENAME String::value_type,
+ BOOST_DEDUCED_TYPENAME String::traits_type >& os,
+ const basic_path< String, Traits > & ph )
+ {
+ os << ph.string();
+ return os;
+ }
+
+ template< class String, class Traits >
+ std::basic_istream< BOOST_DEDUCED_TYPENAME String::value_type,
+ BOOST_DEDUCED_TYPENAME String::traits_type > &
+ operator>>
+ ( std::basic_istream< BOOST_DEDUCED_TYPENAME String::value_type,
+ BOOST_DEDUCED_TYPENAME String::traits_type> & is,
+ basic_path< String, Traits > & ph )
+ {
+ String str;
+ is >> str;
+ ph = str;
+ return is;
+ }
+# endif
+
+ // basic_filesystem_error helpers --------------------------------------//
+
+ // Originally choice of implementation was done via specialization of
+ // basic_filesystem_error::what(). Several compilers (GCC, aCC, etc.)
+ // couldn't handle that, so the choice is now accomplished by overloading.
+
+ namespace detail
+ {
+ // BOOST_FILESYSTEM_DECL version works for VC++ but not GCC. Go figure!
+ inline
+ const char * what( const char * sys_err_what,
+ const path & path1_arg, const path & path2_arg, std::string & target )
+ {
+ try
+ {
+ if ( target.empty() )
+ {
+ target = sys_err_what;
+ if ( !path1_arg.empty() )
+ {
+ target += ": \"";
+ target += path1_arg.file_string();
+ target += "\"";
+ }
+ if ( !path2_arg.empty() )
+ {
+ target += ", \"";
+ target += path2_arg.file_string();
+ target += "\"";
+ }
+ }
+ return target.c_str();
+ }
+ catch (...)
+ {
+ return sys_err_what;
+ }
+ }
+
+ template<class Path>
+ const char * what( const char * sys_err_what,
+ const Path & /*path1_arg*/, const Path & /*path2_arg*/, std::string & /*target*/ )
+ {
+ return sys_err_what;
+ }
+ }
+
+ // basic_filesystem_error ----------------------------------------------//
+
+ template<class Path>
+ class basic_filesystem_error : public system::system_error
+ {
+ // see http://www.boost.org/more/error_handling.html for design rationale
+ public:
+ // compiler generates copy constructor and copy assignment
+
+ typedef Path path_type;
+
+ basic_filesystem_error( const std::string & what_arg,
+ system::error_code ec );
+
+ basic_filesystem_error( const std::string & what_arg,
+ const path_type & path1_arg, system::error_code ec );
+
+ basic_filesystem_error( const std::string & what_arg, const path_type & path1_arg,
+ const path_type & path2_arg, system::error_code ec );
+
+ ~basic_filesystem_error() throw() {}
+
+ const path_type & path1() const
+ {
+ static const path_type empty_path;
+ return m_imp_ptr.get() ? m_imp_ptr->m_path1 : empty_path ;
+ }
+ const path_type & path2() const
+ {
+ static const path_type empty_path;
+ return m_imp_ptr.get() ? m_imp_ptr->m_path2 : empty_path ;
+ }
+
+ const char * what() const throw()
+ {
+ if ( !m_imp_ptr.get() )
+ return system::system_error::what();
+ return detail::what( system::system_error::what(), m_imp_ptr->m_path1,
+ m_imp_ptr->m_path2, m_imp_ptr->m_what );
+ }
+
+ private:
+ struct m_imp
+ {
+ path_type m_path1; // may be empty()
+ path_type m_path2; // may be empty()
+ std::string m_what; // not built until needed
+ };
+ boost::shared_ptr<m_imp> m_imp_ptr;
+ };
+
+ typedef basic_filesystem_error<path> filesystem_error;
+
+# ifndef BOOST_FILESYSTEM_NARROW_ONLY
+ typedef basic_filesystem_error<wpath> wfilesystem_error;
+# endif
+
+ // path::name_checks -----------------------------------------------------//
+
+ BOOST_FILESYSTEM_DECL bool portable_posix_name( const std::string & name );
+ BOOST_FILESYSTEM_DECL bool windows_name( const std::string & name );
+ BOOST_FILESYSTEM_DECL bool portable_name( const std::string & name );
+ BOOST_FILESYSTEM_DECL bool portable_directory_name( const std::string & name );
+ BOOST_FILESYSTEM_DECL bool portable_file_name( const std::string & name );
+ BOOST_FILESYSTEM_DECL bool native( const std::string & name );
+ inline bool no_check( const std::string & )
+ { return true; }
+
+// implementation -----------------------------------------------------------//
+
+ namespace detail
+ {
+
+ // is_separator helper ------------------------------------------------//
+
+ template<class Path>
+ inline bool is_separator( typename Path::string_type::value_type c )
+ {
+ return c == slash<Path>::value
+# ifdef BOOST_WINDOWS_PATH
+ || c == path_alt_separator<Path>::value
+# endif
+ ;
+ }
+
+ // filename_pos helper ----------------------------------------------------//
+
+ template<class String, class Traits>
+ typename String::size_type filename_pos(
+ const String & str, // precondition: portable generic path grammar
+ typename String::size_type end_pos ) // end_pos is past-the-end position
+ // return 0 if str itself is filename (or empty)
+ {
+ typedef typename
+ boost::BOOST_FILESYSTEM_NAMESPACE::basic_path<String, Traits> path_type;
+
+ // case: "//"
+ if ( end_pos == 2
+ && str[0] == slash<path_type>::value
+ && str[1] == slash<path_type>::value ) return 0;
+
+ // case: ends in "/"
+ if ( end_pos && str[end_pos-1] == slash<path_type>::value )
+ return end_pos-1;
+
+ // set pos to start of last element
+ typename String::size_type pos(
+ str.find_last_of( slash<path_type>::value, end_pos-1 ) );
+# ifdef BOOST_WINDOWS_PATH
+ if ( pos == String::npos )
+ pos = str.find_last_of( path_alt_separator<path_type>::value, end_pos-1 );
+ if ( pos == String::npos )
+ pos = str.find_last_of( colon<path_type>::value, end_pos-2 );
+# endif
+
+ return ( pos == String::npos // path itself must be a filename (or empty)
+ || (pos == 1 && str[0] == slash<path_type>::value) ) // or net
+ ? 0 // so filename is entire string
+ : pos + 1; // or starts after delimiter
+ }
+
+ // first_element helper -----------------------------------------------//
+ // sets pos and len of first element, excluding extra separators
+ // if src.empty(), sets pos,len, to 0,0.
+
+ template<class String, class Traits>
+ void first_element(
+ const String & src, // precondition: portable generic path grammar
+ typename String::size_type & element_pos,
+ typename String::size_type & element_size,
+# if !BOOST_WORKAROUND( BOOST_MSVC, <= 1310 ) // VC++ 7.1
+ typename String::size_type size = String::npos
+# else
+ typename String::size_type size = -1
+# endif
+ )
+ {
+ if ( size == String::npos ) size = src.size();
+ element_pos = 0;
+ element_size = 0;
+ if ( src.empty() ) return;
+
+ typedef typename boost::BOOST_FILESYSTEM_NAMESPACE::basic_path<String, Traits> path_type;
+
+ typename String::size_type cur(0);
+
+ // deal with // [network]
+ if ( size >= 2 && src[0] == slash<path_type>::value
+ && src[1] == slash<path_type>::value
+ && (size == 2
+ || src[2] != slash<path_type>::value) )
+ {
+ cur += 2;
+ element_size += 2;
+ }
+
+ // leading (not non-network) separator
+ else if ( src[0] == slash<path_type>::value )
+ {
+ ++element_size;
+ // bypass extra leading separators
+ while ( cur+1 < size
+ && src[cur+1] == slash<path_type>::value )
+ {
+ ++cur;
+ ++element_pos;
+ }
+ return;
+ }
+
+ // at this point, we have either a plain name, a network name,
+ // or (on Windows only) a device name
+
+ // find the end
+ while ( cur < size
+# ifdef BOOST_WINDOWS_PATH
+ && src[cur] != colon<path_type>::value
+# endif
+ && src[cur] != slash<path_type>::value )
+ {
+ ++cur;
+ ++element_size;
+ }
+
+# ifdef BOOST_WINDOWS_PATH
+ if ( cur == size ) return;
+ // include device delimiter
+ if ( src[cur] == colon<path_type>::value )
+ { ++element_size; }
+# endif
+
+ return;
+ }
+
+ // root_directory_start helper ----------------------------------------//
+
+ template<class String, class Traits>
+ typename String::size_type root_directory_start(
+ const String & s, // precondition: portable generic path grammar
+ typename String::size_type size )
+ // return npos if no root_directory found
+ {
+ typedef typename boost::BOOST_FILESYSTEM_NAMESPACE::basic_path<String, Traits> path_type;
+
+# ifdef BOOST_WINDOWS_PATH
+ // case "c:/"
+ if ( size > 2
+ && s[1] == colon<path_type>::value
+ && s[2] == slash<path_type>::value ) return 2;
+# endif
+
+ // case "//"
+ if ( size == 2
+ && s[0] == slash<path_type>::value
+ && s[1] == slash<path_type>::value ) return String::npos;
+
+ // case "//net {/}"
+ if ( size > 3
+ && s[0] == slash<path_type>::value
+ && s[1] == slash<path_type>::value
+ && s[2] != slash<path_type>::value )
+ {
+ typename String::size_type pos(
+ s.find( slash<path_type>::value, 2 ) );
+ return pos < size ? pos : String::npos;
+ }
+
+ // case "/"
+ if ( size > 0 && s[0] == slash<path_type>::value ) return 0;
+
+ return String::npos;
+ }
+
+ // is_non_root_slash helper -------------------------------------------//
+
+ template<class String, class Traits>
+ bool is_non_root_slash( const String & str,
+ typename String::size_type pos ) // pos is position of the slash
+ {
+ typedef typename
+ boost::BOOST_FILESYSTEM_NAMESPACE::basic_path<String, Traits>
+ path_type;
+
+ assert( !str.empty() && str[pos] == slash<path_type>::value
+ && "precondition violation" );
+
+ // subsequent logic expects pos to be for leftmost slash of a set
+ while ( pos > 0 && str[pos-1] == slash<path_type>::value )
+ --pos;
+
+ return pos != 0
+ && (pos <= 2 || str[1] != slash<path_type>::value
+ || str.find( slash<path_type>::value, 2 ) != pos)
+# ifdef BOOST_WINDOWS_PATH
+ && (pos !=2 || str[1] != colon<path_type>::value)
+# endif
+ ;
+ }
+ } // namespace detail
+
+ // decomposition functions ----------------------------------------------//
+
+ template<class String, class Traits>
+ String basic_path<String, Traits>::filename() const
+ {
+ typename String::size_type end_pos(
+ detail::filename_pos<String, Traits>( m_path, m_path.size() ) );
+ return (m_path.size()
+ && end_pos
+ && m_path[end_pos] == slash<path_type>::value
+ && detail::is_non_root_slash< String, Traits >(m_path, end_pos))
+ ? String( 1, dot<path_type>::value )
+ : m_path.substr( end_pos );
+ }
+
+ template<class String, class Traits>
+ String basic_path<String, Traits>::stem() const
+ {
+ string_type name = filename();
+ typename string_type::size_type n = name.rfind('.');
+ return name.substr(0, n);
+ }
+
+ template<class String, class Traits>
+ String basic_path<String, Traits>::extension() const
+ {
+ string_type name = filename();
+ typename string_type::size_type n = name.rfind('.');
+ if (n != string_type::npos)
+ return name.substr(n);
+ else
+ return string_type();
+ }
+
+ template<class String, class Traits>
+ basic_path<String, Traits> basic_path<String, Traits>::parent_path() const
+ {
+ typename String::size_type end_pos(
+ detail::filename_pos<String, Traits>( m_path, m_path.size() ) );
+
+ bool filename_was_separator( m_path.size()
+ && m_path[end_pos] == slash<path_type>::value );
+
+ // skip separators unless root directory
+ typename string_type::size_type root_dir_pos( detail::root_directory_start
+ <string_type, traits_type>( m_path, end_pos ) );
+ for ( ;
+ end_pos > 0
+ && (end_pos-1) != root_dir_pos
+ && m_path[end_pos-1] == slash<path_type>::value
+ ;
+ --end_pos ) {}
+
+ return (end_pos == 1 && root_dir_pos == 0 && filename_was_separator)
+ ? path_type()
+ : path_type( m_path.substr( 0, end_pos ) );
+ }
+
+ template<class String, class Traits>
+ basic_path<String, Traits> basic_path<String, Traits>::relative_path() const
+ {
+ iterator itr( begin() );
+ for ( ; itr.m_pos != m_path.size()
+ && (itr.m_name[0] == slash<path_type>::value
+# ifdef BOOST_WINDOWS_PATH
+ || itr.m_name[itr.m_name.size()-1]
+ == colon<path_type>::value
+# endif
+ ); ++itr ) {}
+
+ return basic_path<String, Traits>( m_path.substr( itr.m_pos ) );
+ }
+
+ template<class String, class Traits>
+ String basic_path<String, Traits>::root_name() const
+ {
+ iterator itr( begin() );
+
+ return ( itr.m_pos != m_path.size()
+ && (
+ ( itr.m_name.size() > 1
+ && itr.m_name[0] == slash<path_type>::value
+ && itr.m_name[1] == slash<path_type>::value
+ )
+# ifdef BOOST_WINDOWS_PATH
+ || itr.m_name[itr.m_name.size()-1]
+ == colon<path_type>::value
+# endif
+ ) )
+ ? *itr
+ : String();
+ }
+
+ template<class String, class Traits>
+ String basic_path<String, Traits>::root_directory() const
+ {
+ typename string_type::size_type start(
+ detail::root_directory_start<String, Traits>( m_path, m_path.size() ) );
+
+ return start == string_type::npos
+ ? string_type()
+ : m_path.substr( start, 1 );
+ }
+
+ template<class String, class Traits>
+ basic_path<String, Traits> basic_path<String, Traits>::root_path() const
+ {
+ // even on POSIX, root_name() is non-empty() on network paths
+ return basic_path<String, Traits>( root_name() ) /= root_directory();
+ }
+
+ // path query functions -------------------------------------------------//
+
+ template<class String, class Traits>
+ inline bool basic_path<String, Traits>::is_complete() const
+ {
+# ifdef BOOST_WINDOWS_PATH
+ return has_root_name() && has_root_directory();
+# else
+ return has_root_directory();
+# endif
+ }
+
+ template<class String, class Traits>
+ inline bool basic_path<String, Traits>::has_root_path() const
+ {
+ return !root_path().empty();
+ }
+
+ template<class String, class Traits>
+ inline bool basic_path<String, Traits>::has_root_name() const
+ {
+ return !root_name().empty();
+ }
+
+ template<class String, class Traits>
+ inline bool basic_path<String, Traits>::has_root_directory() const
+ {
+ return !root_directory().empty();
+ }
+
+ // append ---------------------------------------------------------------//
+
+ template<class String, class Traits>
+ void basic_path<String, Traits>::m_append_separator_if_needed()
+ // requires: !empty()
+ {
+ if (
+# ifdef BOOST_WINDOWS_PATH
+ *(m_path.end()-1) != colon<path_type>::value &&
+# endif
+ *(m_path.end()-1) != slash<path_type>::value )
+ {
+ m_path += slash<path_type>::value;
+ }
+ }
+
+ template<class String, class Traits>
+ void basic_path<String, Traits>::m_append( value_type value )
+ {
+# ifdef BOOST_CYGWIN_PATH
+ if ( m_path.empty() ) m_cygwin_root = (value == slash<path_type>::value);
+# endif
+
+# ifdef BOOST_WINDOWS_PATH
+ // for BOOST_WINDOWS_PATH, convert alt_separator ('\') to separator ('/')
+ m_path += ( value == path_alt_separator<path_type>::value
+ ? slash<path_type>::value
+ : value );
+# else
+ m_path += value;
+# endif
+ }
+
+ // except that it wouldn't work for BOOST_NO_MEMBER_TEMPLATES compilers,
+ // the append() member template could replace this code.
+ template<class String, class Traits>
+ basic_path<String, Traits> & basic_path<String, Traits>::operator /=
+ ( const value_type * next_p )
+ {
+ // ignore escape sequence on POSIX or Windows
+ if ( *next_p == slash<path_type>::value
+ && *(next_p+1) == slash<path_type>::value
+ && *(next_p+2) == colon<path_type>::value ) next_p += 3;
+
+ // append slash<path_type>::value if needed
+ if ( !empty() && *next_p != 0
+ && !detail::is_separator<path_type>( *next_p ) )
+ { m_append_separator_if_needed(); }
+
+ for ( ; *next_p != 0; ++next_p ) m_append( *next_p );
+ return *this;
+ }
+
+# ifndef BOOST_NO_MEMBER_TEMPLATES
+ template<class String, class Traits> template <class InputIterator>
+ basic_path<String, Traits> & basic_path<String, Traits>::append(
+ InputIterator first, InputIterator last )
+ {
+ // append slash<path_type>::value if needed
+ if ( !empty() && first != last
+ && !detail::is_separator<path_type>( *first ) )
+ { m_append_separator_if_needed(); }
+
+ // song-and-dance to avoid violating InputIterator requirements
+ // (which prohibit lookahead) in detecting a possible escape sequence
+ // (escape sequences are simply ignored on POSIX and Windows)
+ bool was_escape_sequence(true);
+ std::size_t append_count(0);
+ typename String::size_type initial_pos( m_path.size() );
+
+ for ( ; first != last && *first; ++first )
+ {
+ if ( append_count == 0 && *first != slash<path_type>::value )
+ was_escape_sequence = false;
+ if ( append_count == 1 && *first != slash<path_type>::value )
+ was_escape_sequence = false;
+ if ( append_count == 2 && *first != colon<path_type>::value )
+ was_escape_sequence = false;
+ m_append( *first );
+ ++append_count;
+ }
+
+ // erase escape sequence if any
+ if ( was_escape_sequence && append_count >= 3 )
+ m_path.erase( initial_pos, 3 );
+
+ return *this;
+ }
+# endif
+
+# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
+
+ // canonize ------------------------------------------------------------//
+
+ template<class String, class Traits>
+ basic_path<String, Traits> & basic_path<String, Traits>::canonize()
+ {
+ static const typename string_type::value_type dot_str[]
+ = { dot<path_type>::value, 0 };
+
+ if ( m_path.empty() ) return *this;
+
+ path_type temp;
+
+ for ( iterator itr( begin() ); itr != end(); ++itr )
+ {
+ temp /= *itr;
+ };
+
+ if ( temp.empty() ) temp /= dot_str;
+ m_path = temp.m_path;
+ return *this;
+ }
+
+ // normalize ------------------------------------------------------------//
+
+ template<class String, class Traits>
+ basic_path<String, Traits> & basic_path<String, Traits>::normalize()
+ {
+ static const typename string_type::value_type dot_str[]
+ = { dot<path_type>::value, 0 };
+
+ if ( m_path.empty() ) return *this;
+
+ path_type temp;
+ iterator start( begin() );
+ iterator last( end() );
+ iterator stop( last-- );
+ for ( iterator itr( start ); itr != stop; ++itr )
+ {
+ // ignore "." except at start and last
+ if ( itr->size() == 1
+ && (*itr)[0] == dot<path_type>::value
+ && itr != start
+ && itr != last ) continue;
+
+ // ignore a name and following ".."
+ if ( !temp.empty()
+ && itr->size() == 2
+ && (*itr)[0] == dot<path_type>::value
+ && (*itr)[1] == dot<path_type>::value ) // dot dot
+ {
+ string_type lf( temp.filename() );
+ if ( lf.size() > 0
+ && (lf.size() != 1
+ || (lf[0] != dot<path_type>::value
+ && lf[0] != slash<path_type>::value))
+ && (lf.size() != 2
+ || (lf[0] != dot<path_type>::value
+ && lf[1] != dot<path_type>::value
+# ifdef BOOST_WINDOWS_PATH
+ && lf[1] != colon<path_type>::value
+# endif
+ )
+ )
+ )
+ {
+ temp.remove_filename();
+ // if not root directory, must also remove "/" if any
+ if ( temp.m_path.size() > 0
+ && temp.m_path[temp.m_path.size()-1]
+ == slash<path_type>::value )
+ {
+ typename string_type::size_type rds(
+ detail::root_directory_start<String,Traits>( temp.m_path,
+ temp.m_path.size() ) );
+ if ( rds == string_type::npos
+ || rds != temp.m_path.size()-1 )
+ { temp.m_path.erase( temp.m_path.size()-1 ); }
+ }
+
+ iterator next( itr );
+ if ( temp.empty() && ++next != stop
+ && next == last && *last == dot_str ) temp /= dot_str;
+ continue;
+ }
+ }
+
+ temp /= *itr;
+ };
+
+ if ( temp.empty() ) temp /= dot_str;
+ m_path = temp.m_path;
+ return *this;
+ }
+
+# endif
+
+ // modifiers ------------------------------------------------------------//
+
+ template<class String, class Traits>
+ basic_path<String, Traits> & basic_path<String, Traits>::remove_filename()
+ {
+ m_path.erase(
+ detail::filename_pos<String, Traits>( m_path, m_path.size() ) );
+ return *this;
+ }
+
+ template<class String, class Traits>
+ basic_path<String, Traits> &
+ basic_path<String, Traits>::replace_extension( const string_type & new_ext )
+ {
+ // erase existing extension if any
+ string_type old_ext = extension();
+ if ( !old_ext.empty() )
+ m_path.erase( m_path.size() - old_ext.size() );
+
+ if ( !new_ext.empty() && new_ext[0] != dot<path_type>::value )
+ m_path += dot<path_type>::value;
+
+ m_path += new_ext;
+
+ return *this;
+ }
+
+
+ // path conversion functions --------------------------------------------//
+
+ template<class String, class Traits>
+ const String
+ basic_path<String, Traits>::file_string() const
+ {
+# ifdef BOOST_WINDOWS_PATH
+ // for Windows, use the alternate separator, and bypass extra
+ // root separators
+
+ typename string_type::size_type root_dir_start(
+ detail::root_directory_start<String, Traits>( m_path, m_path.size() ) );
+ bool in_root( root_dir_start != string_type::npos );
+ String s;
+ for ( typename string_type::size_type pos( 0 );
+ pos != m_path.size(); ++pos )
+ {
+ // special case // [net]
+ if ( pos == 0 && m_path.size() > 1
+ && m_path[0] == slash<path_type>::value
+ && m_path[1] == slash<path_type>::value
+ && ( m_path.size() == 2
+ || !detail::is_separator<path_type>( m_path[2] )
+ ) )
+ {
+ ++pos;
+ s += path_alt_separator<path_type>::value;
+ s += path_alt_separator<path_type>::value;
+ continue;
+ }
+
+ // bypass extra root separators
+ if ( in_root )
+ {
+ if ( s.size() > 0
+ && s[s.size()-1] == path_alt_separator<path_type>::value
+ && m_path[pos] == slash<path_type>::value
+ ) continue;
+ }
+
+ if ( m_path[pos] == slash<path_type>::value )
+ s += path_alt_separator<path_type>::value;
+ else
+ s += m_path[pos];
+
+ if ( pos > root_dir_start
+ && m_path[pos] == slash<path_type>::value )
+ { in_root = false; }
+ }
+# ifdef BOOST_CYGWIN_PATH
+ if ( m_cygwin_root ) s[0] = slash<path_type>::value;
+# endif
+ return s;
+# else
+ return m_path;
+# endif
+ }
+
+ // iterator functions ---------------------------------------------------//
+
+ template<class String, class Traits>
+ typename basic_path<String, Traits>::iterator basic_path<String, Traits>::begin() const
+ {
+ iterator itr;
+ itr.m_path_ptr = this;
+ typename string_type::size_type element_size;
+ detail::first_element<String, Traits>( m_path, itr.m_pos, element_size );
+ itr.m_name = m_path.substr( itr.m_pos, element_size );
+ return itr;
+ }
+
+ template<class String, class Traits>
+ typename basic_path<String, Traits>::iterator basic_path<String, Traits>::end() const
+ {
+ iterator itr;
+ itr.m_path_ptr = this;
+ itr.m_pos = m_path.size();
+ return itr;
+ }
+
+ namespace detail
+ {
+ // do_increment ------------------------------------------------------//
+
+ template<class Path>
+ void iterator_helper<Path>::do_increment( iterator & itr )
+ {
+ typedef typename Path::string_type string_type;
+ typedef typename Path::traits_type traits_type;
+
+ assert( itr.m_pos < itr.m_path_ptr->m_path.size() && "basic_path::iterator increment past end()" );
+
+ bool was_net( itr.m_name.size() > 2
+ && itr.m_name[0] == slash<Path>::value
+ && itr.m_name[1] == slash<Path>::value
+ && itr.m_name[2] != slash<Path>::value );
+
+ // increment to position past current element
+ itr.m_pos += itr.m_name.size();
+
+ // if end reached, create end iterator
+ if ( itr.m_pos == itr.m_path_ptr->m_path.size() )
+ {
+ itr.m_name.erase( itr.m_name.begin(), itr.m_name.end() ); // VC++ 6.0 lib didn't supply clear()
+ return;
+ }
+
+ // process separator (Windows drive spec is only case not a separator)
+ if ( itr.m_path_ptr->m_path[itr.m_pos] == slash<Path>::value )
+ {
+ // detect root directory
+ if ( was_net
+ # ifdef BOOST_WINDOWS_PATH
+ // case "c:/"
+ || itr.m_name[itr.m_name.size()-1] == colon<Path>::value
+ # endif
+ )
+ {
+ itr.m_name = slash<Path>::value;
+ return;
+ }
+
+ // bypass separators
+ while ( itr.m_pos != itr.m_path_ptr->m_path.size()
+ && itr.m_path_ptr->m_path[itr.m_pos] == slash<Path>::value )
+ { ++itr.m_pos; }
+
+ // detect trailing separator, and treat it as ".", per POSIX spec
+ if ( itr.m_pos == itr.m_path_ptr->m_path.size()
+ && detail::is_non_root_slash< string_type, traits_type >(
+ itr.m_path_ptr->m_path, itr.m_pos-1 ) )
+ {
+ --itr.m_pos;
+ itr.m_name = dot<Path>::value;
+ return;
+ }
+ }
+
+ // get next element
+ typename string_type::size_type end_pos(
+ itr.m_path_ptr->m_path.find( slash<Path>::value, itr.m_pos ) );
+ itr.m_name = itr.m_path_ptr->m_path.substr( itr.m_pos, end_pos - itr.m_pos );
+ }
+
+ // do_decrement ------------------------------------------------------//
+
+ template<class Path>
+ void iterator_helper<Path>::do_decrement( iterator & itr )
+ {
+ assert( itr.m_pos && "basic_path::iterator decrement past begin()" );
+
+ typedef typename Path::string_type string_type;
+ typedef typename Path::traits_type traits_type;
+
+ typename string_type::size_type end_pos( itr.m_pos );
+
+ typename string_type::size_type root_dir_pos(
+ detail::root_directory_start<string_type, traits_type>(
+ itr.m_path_ptr->m_path, end_pos ) );
+
+ // if at end and there was a trailing non-root '/', return "."
+ if ( itr.m_pos == itr.m_path_ptr->m_path.size()
+ && itr.m_path_ptr->m_path.size() > 1
+ && itr.m_path_ptr->m_path[itr.m_pos-1] == slash<Path>::value
+ && detail::is_non_root_slash< string_type, traits_type >(
+ itr.m_path_ptr->m_path, itr.m_pos-1 )
+ )
+ {
+ --itr.m_pos;
+ itr.m_name = dot<Path>::value;
+ return;
+ }
+
+ // skip separators unless root directory
+ for (
+ ;
+ end_pos > 0
+ && (end_pos-1) != root_dir_pos
+ && itr.m_path_ptr->m_path[end_pos-1] == slash<Path>::value
+ ;
+ --end_pos ) {}
+
+ itr.m_pos = detail::filename_pos<string_type, traits_type>
+ ( itr.m_path_ptr->m_path, end_pos );
+ itr.m_name = itr.m_path_ptr->m_path.substr( itr.m_pos, end_pos - itr.m_pos );
+ }
+ } // namespace detail
+
+ // basic_filesystem_error implementation --------------------------------//
+
+ template<class Path>
+ basic_filesystem_error<Path>::basic_filesystem_error(
+ const std::string & what_arg, system::error_code ec )
+ : system::system_error(ec, what_arg)
+ {
+ try
+ {
+ m_imp_ptr.reset( new m_imp );
+ }
+ catch (...) { m_imp_ptr.reset(); }
+ }
+
+ template<class Path>
+ basic_filesystem_error<Path>::basic_filesystem_error(
+ const std::string & what_arg, const path_type & path1_arg,
+ system::error_code ec )
+ : system::system_error(ec, what_arg)
+ {
+ try
+ {
+ m_imp_ptr.reset( new m_imp );
+ m_imp_ptr->m_path1 = path1_arg;
+ }
+ catch (...) { m_imp_ptr.reset(); }
+ }
+
+ template<class Path>
+ basic_filesystem_error<Path>::basic_filesystem_error(
+ const std::string & what_arg, const path_type & path1_arg,
+ const path_type & path2_arg, system::error_code ec )
+ : system::system_error(ec, what_arg)
+ {
+ try
+ {
+ m_imp_ptr.reset( new m_imp );
+ m_imp_ptr->m_path1 = path1_arg;
+ m_imp_ptr->m_path2 = path2_arg;
+ }
+ catch (...) { m_imp_ptr.reset(); }
+ }
+
+ } // namespace BOOST_FILESYSTEM_NAMESPACE
+} // namespace boost
+
+#include <boost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
+
+#endif // BOOST_FILESYSTEM_PATH_HPP