+// 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