fs_path.h
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// Class filesystem::path -*- C++ -*- // Copyright (C) 2014-2018 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file include/bits/fs_path.h * This is an internal header file, included by other library headers. * Do not attempt to use it directly. @headername{filesystem} */ #ifndef _GLIBCXX_FS_PATH_H #define _GLIBCXX_FS_PATH_H 1 #if __cplusplus >= 201703L #include <utility> #include <type_traits> #include <vector> #include <locale> #include <iosfwd> #include <codecvt> #include <string_view> #include <system_error> #include <bits/stl_algobase.h> #include <bits/quoted_string.h> #include <bits/locale_conv.h> #if defined(_WIN32) && !defined(__CYGWIN__) # define _GLIBCXX_FILESYSTEM_IS_WINDOWS 1 # include <algorithm> #endif namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION namespace filesystem { _GLIBCXX_BEGIN_NAMESPACE_CXX11 /** * @ingroup filesystem * @{ */ /// A filesystem path. class path { template<typename _CharT> struct __is_encoded_char : std::false_type { }; template<typename _Iter, typename _Iter_traits = std::iterator_traits<_Iter>> using __is_path_iter_src = __and_<__is_encoded_char<typename _Iter_traits::value_type>, std::is_base_of<std::input_iterator_tag, typename _Iter_traits::iterator_category>>; template<typename _Iter> static __is_path_iter_src<_Iter> __is_path_src(_Iter, int); template<typename _CharT, typename _Traits, typename _Alloc> static __is_encoded_char<_CharT> __is_path_src(const basic_string<_CharT, _Traits, _Alloc>&, int); template<typename _CharT, typename _Traits> static __is_encoded_char<_CharT> __is_path_src(const basic_string_view<_CharT, _Traits>&, int); template<typename _Unknown> static std::false_type __is_path_src(const _Unknown&, ...); template<typename _Tp1, typename _Tp2> struct __constructible_from; template<typename _Iter> struct __constructible_from<_Iter, _Iter> : __is_path_iter_src<_Iter> { }; template<typename _Source> struct __constructible_from<_Source, void> : decltype(__is_path_src(std::declval<_Source>(), 0)) { }; template<typename _Tp1, typename _Tp2 = void> using _Path = typename std::enable_if<__and_<__not_<is_same<remove_cv_t<_Tp1>, path>>, __not_<is_void<remove_pointer_t<_Tp1>>>, __constructible_from<_Tp1, _Tp2>>::value, path>::type; template<typename _Source> static _Source _S_range_begin(_Source __begin) { return __begin; } struct __null_terminated { }; template<typename _Source> static __null_terminated _S_range_end(_Source) { return {}; } template<typename _CharT, typename _Traits, typename _Alloc> static const _CharT* _S_range_begin(const basic_string<_CharT, _Traits, _Alloc>& __str) { return __str.data(); } template<typename _CharT, typename _Traits, typename _Alloc> static const _CharT* _S_range_end(const basic_string<_CharT, _Traits, _Alloc>& __str) { return __str.data() + __str.size(); } template<typename _CharT, typename _Traits> static const _CharT* _S_range_begin(const basic_string_view<_CharT, _Traits>& __str) { return __str.data(); } template<typename _CharT, typename _Traits> static const _CharT* _S_range_end(const basic_string_view<_CharT, _Traits>& __str) { return __str.data() + __str.size(); } template<typename _Tp, typename _Iter = decltype(_S_range_begin(std::declval<_Tp>())), typename _Val = typename std::iterator_traits<_Iter>::value_type> using __value_type_is_char = typename std::enable_if<std::is_same<_Val, char>::value>::type; public: #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS typedef wchar_t value_type; static constexpr value_type preferred_separator = L'\\'; #else typedef char value_type; static constexpr value_type preferred_separator = '/'; #endif typedef std::basic_string<value_type> string_type; enum format { native_format, generic_format, auto_format }; // constructors and destructor path() noexcept { } path(const path& __p) = default; path(path&& __p) noexcept : _M_pathname(std::move(__p._M_pathname)), _M_type(__p._M_type) { if (_M_type == _Type::_Multi) _M_split_cmpts(); __p.clear(); } path(string_type&& __source, format = auto_format) : _M_pathname(std::move(__source)) { _M_split_cmpts(); } template<typename _Source, typename _Require = _Path<_Source>> path(_Source const& __source, format = auto_format) : _M_pathname(_S_convert(_S_range_begin(__source), _S_range_end(__source))) { _M_split_cmpts(); } template<typename _InputIterator, typename _Require = _Path<_InputIterator, _InputIterator>> path(_InputIterator __first, _InputIterator __last, format = auto_format) : _M_pathname(_S_convert(__first, __last)) { _M_split_cmpts(); } template<typename _Source, typename _Require = _Path<_Source>, typename _Require2 = __value_type_is_char<_Source>> path(_Source const& __source, const locale& __loc, format = auto_format) : _M_pathname(_S_convert_loc(_S_range_begin(__source), _S_range_end(__source), __loc)) { _M_split_cmpts(); } template<typename _InputIterator, typename _Require = _Path<_InputIterator, _InputIterator>, typename _Require2 = __value_type_is_char<_InputIterator>> path(_InputIterator __first, _InputIterator __last, const locale& __loc, format = auto_format) : _M_pathname(_S_convert_loc(__first, __last, __loc)) { _M_split_cmpts(); } ~path() = default; // assignments path& operator=(const path& __p) = default; path& operator=(path&& __p) noexcept; path& operator=(string_type&& __source); path& assign(string_type&& __source); template<typename _Source> _Path<_Source>& operator=(_Source const& __source) { return *this = path(__source); } template<typename _Source> _Path<_Source>& assign(_Source const& __source) { return *this = path(__source); } template<typename _InputIterator> _Path<_InputIterator, _InputIterator>& assign(_InputIterator __first, _InputIterator __last) { return *this = path(__first, __last); } // appends path& operator/=(const path& __p) { #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS if (__p.is_absolute() || (__p.has_root_name() && __p.root_name() != root_name())) operator=(__p); else { string_type __pathname; if (__p.has_root_directory()) __pathname = root_name().native(); else if (has_filename() || (!has_root_directory() && is_absolute())) __pathname = _M_pathname + preferred_separator; __pathname += __p.relative_path().native(); // XXX is this right? _M_pathname.swap(__pathname); _M_split_cmpts(); } #else // Much simpler, as any path with root-name or root-dir is absolute. if (__p.is_absolute()) operator=(__p); else { if (has_filename() || (_M_type == _Type::_Root_name)) _M_pathname += preferred_separator; _M_pathname += __p.native(); _M_split_cmpts(); } #endif return *this; } template <class _Source> _Path<_Source>& operator/=(_Source const& __source) { return _M_append(path(__source)); } template<typename _Source> _Path<_Source>& append(_Source const& __source) { return _M_append(path(__source)); } template<typename _InputIterator> _Path<_InputIterator, _InputIterator>& append(_InputIterator __first, _InputIterator __last) { return _M_append(path(__first, __last)); } // concatenation path& operator+=(const path& __x); path& operator+=(const string_type& __x); path& operator+=(const value_type* __x); path& operator+=(value_type __x); path& operator+=(basic_string_view<value_type> __x); template<typename _Source> _Path<_Source>& operator+=(_Source const& __x) { return concat(__x); } template<typename _CharT> _Path<_CharT*, _CharT*>& operator+=(_CharT __x); template<typename _Source> _Path<_Source>& concat(_Source const& __x) { return *this += _S_convert(_S_range_begin(__x), _S_range_end(__x)); } template<typename _InputIterator> _Path<_InputIterator, _InputIterator>& concat(_InputIterator __first, _InputIterator __last) { return *this += _S_convert(__first, __last); } // modifiers void clear() noexcept { _M_pathname.clear(); _M_split_cmpts(); } path& make_preferred(); path& remove_filename(); path& replace_filename(const path& __replacement); path& replace_extension(const path& __replacement = path()); void swap(path& __rhs) noexcept; // native format observers const string_type& native() const noexcept { return _M_pathname; } const value_type* c_str() const noexcept { return _M_pathname.c_str(); } operator string_type() const { return _M_pathname; } template<typename _CharT, typename _Traits = std::char_traits<_CharT>, typename _Allocator = std::allocator<_CharT>> std::basic_string<_CharT, _Traits, _Allocator> string(const _Allocator& __a = _Allocator()) const; std::string string() const; #if _GLIBCXX_USE_WCHAR_T std::wstring wstring() const; #endif std::string u8string() const; std::u16string u16string() const; std::u32string u32string() const; // generic format observers template<typename _CharT, typename _Traits = std::char_traits<_CharT>, typename _Allocator = std::allocator<_CharT>> std::basic_string<_CharT, _Traits, _Allocator> generic_string(const _Allocator& __a = _Allocator()) const; std::string generic_string() const; #if _GLIBCXX_USE_WCHAR_T std::wstring generic_wstring() const; #endif std::string generic_u8string() const; std::u16string generic_u16string() const; std::u32string generic_u32string() const; // compare int compare(const path& __p) const noexcept; int compare(const string_type& __s) const; int compare(const value_type* __s) const; int compare(const basic_string_view<value_type> __s) const; // decomposition path root_name() const; path root_directory() const; path root_path() const; path relative_path() const; path parent_path() const; path filename() const; path stem() const; path extension() const; // query [[nodiscard]] bool empty() const noexcept { return _M_pathname.empty(); } bool has_root_name() const; bool has_root_directory() const; bool has_root_path() const; bool has_relative_path() const; bool has_parent_path() const; bool has_filename() const; bool has_stem() const; bool has_extension() const; bool is_absolute() const { return has_root_directory(); } bool is_relative() const { return !is_absolute(); } // generation path lexically_normal() const; path lexically_relative(const path& base) const; path lexically_proximate(const path& base) const; // iterators class iterator; typedef iterator const_iterator; iterator begin() const; iterator end() const; private: enum class _Type : unsigned char { _Multi, _Root_name, _Root_dir, _Filename }; path(string_type __str, _Type __type) : _M_pathname(__str), _M_type(__type) { __glibcxx_assert(_M_type != _Type::_Multi); } enum class _Split { _Stem, _Extension }; path& _M_append(path __p) { if (__p.is_absolute()) operator=(std::move(__p)); #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS else if (__p.has_root_name() && __p.root_name() != root_name()) operator=(std::move(__p)); #endif else operator/=(const_cast<const path&>(__p)); return *this; } pair<const string_type*, size_t> _M_find_extension() const; template<typename _CharT> struct _Cvt; static string_type _S_convert(value_type* __src, __null_terminated) { return string_type(__src); } static string_type _S_convert(const value_type* __src, __null_terminated) { return string_type(__src); } template<typename _Iter> static string_type _S_convert(_Iter __first, _Iter __last) { using __value_type = typename std::iterator_traits<_Iter>::value_type; return _Cvt<typename remove_cv<__value_type>::type>:: _S_convert(__first, __last); } template<typename _InputIterator> static string_type _S_convert(_InputIterator __src, __null_terminated) { using _Tp = typename std::iterator_traits<_InputIterator>::value_type; std::basic_string<typename remove_cv<_Tp>::type> __tmp; for (; *__src != _Tp{}; ++__src) __tmp.push_back(*__src); return _S_convert(__tmp.c_str(), __tmp.c_str() + __tmp.size()); } static string_type _S_convert_loc(const char* __first, const char* __last, const std::locale& __loc); template<typename _Iter> static string_type _S_convert_loc(_Iter __first, _Iter __last, const std::locale& __loc) { const std::string __str(__first, __last); return _S_convert_loc(__str.data(), __str.data()+__str.size(), __loc); } template<typename _InputIterator> static string_type _S_convert_loc(_InputIterator __src, __null_terminated, const std::locale& __loc) { std::string __tmp; while (*__src != '\0') __tmp.push_back(*__src++); return _S_convert_loc(__tmp.data(), __tmp.data()+__tmp.size(), __loc); } template<typename _CharT, typename _Traits, typename _Allocator> static basic_string<_CharT, _Traits, _Allocator> _S_str_convert(basic_string_view<value_type>, const _Allocator&); static bool _S_is_dir_sep(value_type __ch) { #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS return __ch == L'/' || __ch == preferred_separator; #else return __ch == '/'; #endif } void _M_split_cmpts(); void _M_trim(); void _M_add_root_name(size_t __n); void _M_add_root_dir(size_t __pos); void _M_add_filename(size_t __pos, size_t __n); string_type _M_pathname; struct _Cmpt; using _List = _GLIBCXX_STD_C::vector<_Cmpt>; _List _M_cmpts; // empty unless _M_type == _Type::_Multi _Type _M_type = _Type::_Filename; }; template<> struct path::__is_encoded_char<char> : std::true_type { using value_type = char; }; template<> struct path::__is_encoded_char<wchar_t> : std::true_type { using value_type = wchar_t; }; template<> struct path::__is_encoded_char<char16_t> : std::true_type { using value_type = char16_t; }; template<> struct path::__is_encoded_char<char32_t> : std::true_type { using value_type = char32_t; }; template<typename _Tp> struct path::__is_encoded_char<const _Tp> : __is_encoded_char<_Tp> { }; inline void swap(path& __lhs, path& __rhs) noexcept { __lhs.swap(__rhs); } size_t hash_value(const path& __p) noexcept; /// Compare paths inline bool operator<(const path& __lhs, const path& __rhs) noexcept { return __lhs.compare(__rhs) < 0; } /// Compare paths inline bool operator<=(const path& __lhs, const path& __rhs) noexcept { return !(__rhs < __lhs); } /// Compare paths inline bool operator>(const path& __lhs, const path& __rhs) noexcept { return __rhs < __lhs; } /// Compare paths inline bool operator>=(const path& __lhs, const path& __rhs) noexcept { return !(__lhs < __rhs); } /// Compare paths inline bool operator==(const path& __lhs, const path& __rhs) noexcept { return __lhs.compare(__rhs) == 0; } /// Compare paths inline bool operator!=(const path& __lhs, const path& __rhs) noexcept { return !(__lhs == __rhs); } /// Append one path to another inline path operator/(const path& __lhs, const path& __rhs) { path __result(__lhs); __result /= __rhs; return __result; } /// Write a path to a stream template<typename _CharT, typename _Traits> basic_ostream<_CharT, _Traits>& operator<<(basic_ostream<_CharT, _Traits>& __os, const path& __p) { auto __tmp = __p.string<_CharT, _Traits>(); using __quoted_string = std::__detail::_Quoted_string<decltype(__tmp)&, _CharT>; __os << __quoted_string{__tmp, '"', '\\'}; return __os; } /// Read a path from a stream template<typename _CharT, typename _Traits> basic_istream<_CharT, _Traits>& operator>>(basic_istream<_CharT, _Traits>& __is, path& __p) { basic_string<_CharT, _Traits> __tmp; using __quoted_string = std::__detail::_Quoted_string<decltype(__tmp)&, _CharT>; if (__is >> __quoted_string{ __tmp, '"', '\\' }) __p = std::move(__tmp); return __is; } template<typename _Source> inline auto u8path(const _Source& __source) -> decltype(filesystem::path(__source, std::locale::classic())) { #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS const std::string __u8str{__source}; return std::filesystem::u8path(__u8str.begin(), __u8str.end()); #else return path{ __source }; #endif } template<typename _InputIterator> inline auto u8path(_InputIterator __first, _InputIterator __last) -> decltype(filesystem::path(__first, __last, std::locale::classic())) { #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS codecvt_utf8<value_type> __cvt; string_type __tmp; if (__str_codecvt_in(__first, __last, __tmp, __cvt)) return path{ __tmp }; else return {}; #else return path{ __first, __last }; #endif } class filesystem_error : public std::system_error { public: filesystem_error(const string& __what_arg, error_code __ec) : system_error(__ec, __what_arg) { } filesystem_error(const string& __what_arg, const path& __p1, error_code __ec) : system_error(__ec, __what_arg), _M_path1(__p1) { } filesystem_error(const string& __what_arg, const path& __p1, const path& __p2, error_code __ec) : system_error(__ec, __what_arg), _M_path1(__p1), _M_path2(__p2) { } ~filesystem_error(); const path& path1() const noexcept { return _M_path1; } const path& path2() const noexcept { return _M_path2; } const char* what() const noexcept { return _M_what.c_str(); } private: std::string _M_gen_what(); path _M_path1; path _M_path2; std::string _M_what = _M_gen_what(); }; struct path::_Cmpt : path { _Cmpt(string_type __s, _Type __t, size_t __pos) : path(std::move(__s), __t), _M_pos(__pos) { } _Cmpt() : _M_pos(-1) { } size_t _M_pos; }; // specialize _Cvt for degenerate 'noconv' case template<> struct path::_Cvt<path::value_type> { template<typename _Iter> static string_type _S_convert(_Iter __first, _Iter __last) { return string_type{__first, __last}; } }; template<typename _CharT> struct path::_Cvt { #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS static string_type _S_wconvert(const char* __f, const char* __l, true_type) { using _Cvt = std::codecvt<wchar_t, char, mbstate_t>; const auto& __cvt = std::use_facet<_Cvt>(std::locale{}); std::wstring __wstr; if (__str_codecvt_in(__f, __l, __wstr, __cvt)) return __wstr; _GLIBCXX_THROW_OR_ABORT(filesystem_error( "Cannot convert character sequence", std::make_error_code(errc::illegal_byte_sequence))); } static string_type _S_wconvert(const _CharT* __f, const _CharT* __l, false_type) { std::codecvt_utf8<_CharT> __cvt; std::string __str; if (__str_codecvt_out(__f, __l, __str, __cvt)) { const char* __f2 = __str.data(); const char* __l2 = __f2 + __str.size(); std::codecvt_utf8<wchar_t> __wcvt; std::wstring __wstr; if (__str_codecvt_in(__f2, __l2, __wstr, __wcvt)) return __wstr; } _GLIBCXX_THROW_OR_ABORT(filesystem_error( "Cannot convert character sequence", std::make_error_code(errc::illegal_byte_sequence))); } static string_type _S_convert(const _CharT* __f, const _CharT* __l) { return _S_wconvert(__f, __l, is_same<_CharT, char>{}); } #else static string_type _S_convert(const _CharT* __f, const _CharT* __l) { std::codecvt_utf8<_CharT> __cvt; std::string __str; if (__str_codecvt_out(__f, __l, __str, __cvt)) return __str; _GLIBCXX_THROW_OR_ABORT(filesystem_error( "Cannot convert character sequence", std::make_error_code(errc::illegal_byte_sequence))); } #endif static string_type _S_convert(_CharT* __f, _CharT* __l) { return _S_convert(const_cast<const _CharT*>(__f), const_cast<const _CharT*>(__l)); } template<typename _Iter> static string_type _S_convert(_Iter __first, _Iter __last) { const std::basic_string<_CharT> __str(__first, __last); return _S_convert(__str.data(), __str.data() + __str.size()); } template<typename _Iter, typename _Cont> static string_type _S_convert(__gnu_cxx::__normal_iterator<_Iter, _Cont> __first, __gnu_cxx::__normal_iterator<_Iter, _Cont> __last) { return _S_convert(__first.base(), __last.base()); } }; /// An iterator for the components of a path class path::iterator { public: using difference_type = std::ptrdiff_t; using value_type = path; using reference = const path&; using pointer = const path*; using iterator_category = std::bidirectional_iterator_tag; iterator() : _M_path(nullptr), _M_cur(), _M_at_end() { } iterator(const iterator&) = default; iterator& operator=(const iterator&) = default; reference operator*() const; pointer operator->() const { return std::__addressof(**this); } iterator& operator++(); iterator operator++(int) { auto __tmp = *this; ++*this; return __tmp; } iterator& operator--(); iterator operator--(int) { auto __tmp = *this; --*this; return __tmp; } friend bool operator==(const iterator& __lhs, const iterator& __rhs) { return __lhs._M_equals(__rhs); } friend bool operator!=(const iterator& __lhs, const iterator& __rhs) { return !__lhs._M_equals(__rhs); } private: friend class path; iterator(const path* __path, path::_List::const_iterator __iter) : _M_path(__path), _M_cur(__iter), _M_at_end() { } iterator(const path* __path, bool __at_end) : _M_path(__path), _M_cur(), _M_at_end(__at_end) { } bool _M_equals(iterator) const; const path* _M_path; path::_List::const_iterator _M_cur; bool _M_at_end; // only used when type != _Multi }; inline path& path::operator=(path&& __p) noexcept { if (&__p == this) return *this; _M_pathname = std::move(__p._M_pathname); _M_cmpts = std::move(__p._M_cmpts); _M_type = __p._M_type; __p.clear(); return *this; } inline path& path::operator=(string_type&& __source) { return *this = path(std::move(__source)); } inline path& path::assign(string_type&& __source) { return *this = path(std::move(__source)); } inline path& path::operator+=(const path& __p) { return operator+=(__p.native()); } inline path& path::operator+=(const string_type& __x) { _M_pathname += __x; _M_split_cmpts(); return *this; } inline path& path::operator+=(const value_type* __x) { _M_pathname += __x; _M_split_cmpts(); return *this; } inline path& path::operator+=(value_type __x) { _M_pathname += __x; _M_split_cmpts(); return *this; } inline path& path::operator+=(basic_string_view<value_type> __x) { _M_pathname.append(__x.data(), __x.size()); _M_split_cmpts(); return *this; } template<typename _CharT> inline path::_Path<_CharT*, _CharT*>& path::operator+=(_CharT __x) { auto* __addr = std::__addressof(__x); return concat(__addr, __addr + 1); } inline path& path::make_preferred() { #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS std::replace(_M_pathname.begin(), _M_pathname.end(), L'/', preferred_separator); #endif return *this; } inline void path::swap(path& __rhs) noexcept { _M_pathname.swap(__rhs._M_pathname); _M_cmpts.swap(__rhs._M_cmpts); std::swap(_M_type, __rhs._M_type); } template<typename _CharT, typename _Traits, typename _Allocator> std::basic_string<_CharT, _Traits, _Allocator> path::_S_str_convert(basic_string_view<value_type> __str, const _Allocator& __a) { if (__str.size() == 0) return std::basic_string<_CharT, _Traits, _Allocator>(__a); const value_type* __first = __str.data(); const value_type* __last = __first + __str.size(); #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS using _CharAlloc = __alloc_rebind<_Allocator, char>; using _String = basic_string<char, char_traits<char>, _CharAlloc>; using _WString = basic_string<_CharT, _Traits, _Allocator>; // use codecvt_utf8<wchar_t> to convert native string to UTF-8 codecvt_utf8<value_type> __cvt; _String __u8str{_CharAlloc{__a}}; if (__str_codecvt_out(__first, __last, __u8str, __cvt)) { if constexpr (is_same_v<_CharT, char>) return __u8str; else { _WString __wstr; // use codecvt_utf8<_CharT> to convert UTF-8 to wide string codecvt_utf8<_CharT> __cvt; const char* __f = __u8str.data(); const char* __l = __f + __u8str.size(); if (__str_codecvt_in(__f, __l, __wstr, __cvt)) return __wstr; } } #else codecvt_utf8<_CharT> __cvt; basic_string<_CharT, _Traits, _Allocator> __wstr{__a}; if (__str_codecvt_in(__first, __last, __wstr, __cvt)) return __wstr; #endif _GLIBCXX_THROW_OR_ABORT(filesystem_error( "Cannot convert character sequence", std::make_error_code(errc::illegal_byte_sequence))); } template<typename _CharT, typename _Traits, typename _Allocator> inline basic_string<_CharT, _Traits, _Allocator> path::string(const _Allocator& __a) const { if constexpr (is_same_v<_CharT, value_type>) #if _GLIBCXX_USE_CXX11_ABI return { _M_pathname, __a }; #else return { _M_pathname, string_type::size_type(0), __a }; #endif else return _S_str_convert<_CharT, _Traits>(_M_pathname, __a); } inline std::string path::string() const { return string<char>(); } #if _GLIBCXX_USE_WCHAR_T inline std::wstring path::wstring() const { return string<wchar_t>(); } #endif inline std::string path::u8string() const { #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS std::string __str; // convert from native encoding to UTF-8 codecvt_utf8<value_type> __cvt; const value_type* __first = _M_pathname.data(); const value_type* __last = __first + _M_pathname.size(); if (__str_codecvt_out(__first, __last, __str, __cvt)) return __str; _GLIBCXX_THROW_OR_ABORT(filesystem_error( "Cannot convert character sequence", std::make_error_code(errc::illegal_byte_sequence))); #else return _M_pathname; #endif } inline std::u16string path::u16string() const { return string<char16_t>(); } inline std::u32string path::u32string() const { return string<char32_t>(); } template<typename _CharT, typename _Traits, typename _Allocator> inline std::basic_string<_CharT, _Traits, _Allocator> path::generic_string(const _Allocator& __a) const { #ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS const value_type __slash = L'/'; #else const value_type __slash = '/'; #endif using _Alloc2 = typename allocator_traits<_Allocator>::template rebind_alloc<value_type>; basic_string<value_type, char_traits<value_type>, _Alloc2> __str(__a); if (_M_type == _Type::_Root_dir) __str.assign(1, __slash); else { __str.reserve(_M_pathname.size()); bool __add_slash = false; for (auto& __elem : *this) { if (__add_slash) __str += __slash; __str += basic_string_view<value_type>(__elem._M_pathname); __add_slash = __elem._M_type == _Type::_Filename; } } if constexpr (is_same_v<_CharT, value_type>) return __str; else return _S_str_convert<_CharT, _Traits>(__str, __a); } inline std::string path::generic_string() const { return generic_string<char>(); } #if _GLIBCXX_USE_WCHAR_T inline std::wstring path::generic_wstring() const { return generic_string<wchar_t>(); } #endif inline std::string path::generic_u8string() const { return generic_string(); } inline std::u16string path::generic_u16string() const { return generic_string<char16_t>(); } inline std::u32string path::generic_u32string() const { return generic_string<char32_t>(); } inline int path::compare(const string_type& __s) const { return compare(path(__s)); } inline int path::compare(const value_type* __s) const { return compare(path(__s)); } inline int path::compare(basic_string_view<value_type> __s) const { return compare(path(__s)); } inline path path::filename() const { if (empty()) return {}; else if (_M_type == _Type::_Filename) return *this; else if (_M_type == _Type::_Multi) { if (_M_pathname.back() == preferred_separator) return {}; auto& __last = *--end(); if (__last._M_type == _Type::_Filename) return __last; } return {}; } inline path path::stem() const { auto ext = _M_find_extension(); if (ext.first && ext.second != 0) return path{ext.first->substr(0, ext.second)}; return {}; } inline path path::extension() const { auto ext = _M_find_extension(); if (ext.first && ext.second != string_type::npos) return path{ext.first->substr(ext.second)}; return {}; } inline bool path::has_stem() const { auto ext = _M_find_extension(); return ext.first && ext.second != 0; } inline bool path::has_extension() const { auto ext = _M_find_extension(); return ext.first && ext.second != string_type::npos; } inline path::iterator path::begin() const { if (_M_type == _Type::_Multi) return iterator(this, _M_cmpts.begin()); return iterator(this, empty()); } inline path::iterator path::end() const { if (_M_type == _Type::_Multi) return iterator(this, _M_cmpts.end()); return iterator(this, true); } inline path::iterator& path::iterator::operator++() { __glibcxx_assert(_M_path != nullptr); if (_M_path->_M_type == _Type::_Multi) { __glibcxx_assert(_M_cur != _M_path->_M_cmpts.end()); ++_M_cur; } else { __glibcxx_assert(!_M_at_end); _M_at_end = true; } return *this; } inline path::iterator& path::iterator::operator--() { __glibcxx_assert(_M_path != nullptr); if (_M_path->_M_type == _Type::_Multi) { __glibcxx_assert(_M_cur != _M_path->_M_cmpts.begin()); --_M_cur; } else { __glibcxx_assert(_M_at_end); _M_at_end = false; } return *this; } inline path::iterator::reference path::iterator::operator*() const { __glibcxx_assert(_M_path != nullptr); if (_M_path->_M_type == _Type::_Multi) { __glibcxx_assert(_M_cur != _M_path->_M_cmpts.end()); return *_M_cur; } return *_M_path; } inline bool path::iterator::_M_equals(iterator __rhs) const { if (_M_path != __rhs._M_path) return false; if (_M_path == nullptr) return true; if (_M_path->_M_type == path::_Type::_Multi) return _M_cur == __rhs._M_cur; return _M_at_end == __rhs._M_at_end; } // @} group filesystem _GLIBCXX_END_NAMESPACE_CXX11 } // namespace filesystem _GLIBCXX_END_NAMESPACE_VERSION } // namespace std #endif // C++17 #endif // _GLIBCXX_FS_PATH_H
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