// Class filesystem::path -*- C++ -*-
// Copyright (C) 2014-2020 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 <locale>
#include <iosfwd>
#include <iomanip>
#include <codecvt>
#include <string_view>
#include <system_error>
#include <bits/stl_algobase.h>
#include <bits/locale_conv.h>
#include <ext/concurrence.h>
#include <bits/shared_ptr.h>
#include <bits/unique_ptr.h>
#if __cplusplus > 201703L
# include <compare>
#endif
#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
/** @addtogroup filesystem
* @{
*/
class path;
/// @cond undocumented
namespace __detail
{
template<typename _CharT>
using __is_encoded_char = __is_one_of<remove_const_t<_CharT>,
char,
#ifdef _GLIBCXX_USE_CHAR8_T
char8_t,
#endif
#if _GLIBCXX_USE_WCHAR_T
wchar_t,
#endif
char16_t, char32_t>;
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<const _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>
_Source
_S_range_begin(_Source __begin) { return __begin; }
struct __null_terminated { };
template<typename _Source>
__null_terminated
_S_range_end(_Source) { return {}; }
template<typename _CharT, typename _Traits, typename _Alloc>
inline const _CharT*
_S_range_begin(const basic_string<_CharT, _Traits, _Alloc>& __str)
{ return __str.data(); }
template<typename _CharT, typename _Traits, typename _Alloc>
inline const _CharT*
_S_range_end(const basic_string<_CharT, _Traits, _Alloc>& __str)
{ return __str.data() + __str.size(); }
template<typename _CharT, typename _Traits>
inline const _CharT*
_S_range_begin(const basic_string_view<_CharT, _Traits>& __str)
{ return __str.data(); }
template<typename _CharT, typename _Traits>
inline 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,
typename _UnqualVal = std::remove_const_t<_Val>>
using __value_type_is_char
= std::enable_if_t<std::is_same_v<_UnqualVal, char>,
_UnqualVal>;
template<typename _Tp,
typename _Iter = decltype(_S_range_begin(std::declval<_Tp>())),
typename _Val = typename std::iterator_traits<_Iter>::value_type,
typename _UnqualVal = std::remove_const_t<_Val>>
using __value_type_is_char_or_char8_t
= std::enable_if_t<__or_v<
std::is_same<_UnqualVal, char>
#ifdef _GLIBCXX_USE_CHAR8_T
, std::is_same<_UnqualVal, char8_t>
#endif
>,
_UnqualVal>;
} // namespace __detail
/// @endcond
/// A filesystem path.
class path
{
public:
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
using value_type = wchar_t;
static constexpr value_type preferred_separator = L'\\';
#else
# ifdef _GLIBCXX_DOXYGEN
/// Windows uses wchar_t for path::value_type, POSIX uses char.
using value_type = __os_dependent__;
# else
using value_type = char;
# endif
static constexpr value_type preferred_separator = '/';
#endif
using string_type = std::basic_string<value_type>;
/// path::format is ignored in this implementation
enum format : unsigned char { native_format, generic_format, auto_format };
// constructors and destructor
path() noexcept { }
path(const path& __p) = default;
path(path&& __p)
#if _GLIBCXX_USE_CXX11_ABI || _GLIBCXX_FULLY_DYNAMIC_STRING == 0
noexcept
#endif
: _M_pathname(std::move(__p._M_pathname)),
_M_cmpts(std::move(__p._M_cmpts))
{ __p.clear(); }
path(string_type&& __source, format = auto_format)
: _M_pathname(std::move(__source))
{ _M_split_cmpts(); }
template<typename _Source,
typename _Require = __detail::_Path<_Source>>
path(_Source const& __source, format = auto_format)
: _M_pathname(_S_convert(__detail::_S_range_begin(__source),
__detail::_S_range_end(__source)))
{ _M_split_cmpts(); }
template<typename _InputIterator,
typename _Require = __detail::_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 = __detail::_Path<_Source>,
typename _Require2 = __detail::__value_type_is_char<_Source>>
path(_Source const& __source, const locale& __loc, format = auto_format)
: _M_pathname(_S_convert_loc(__detail::_S_range_begin(__source),
__detail::_S_range_end(__source), __loc))
{ _M_split_cmpts(); }
template<typename _InputIterator,
typename _Require = __detail::_Path<_InputIterator, _InputIterator>,
typename _Require2 = __detail::__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&);
path& operator=(path&&) noexcept;
path& operator=(string_type&& __source);
path& assign(string_type&& __source);
template<typename _Source>
__detail::_Path<_Source>&
operator=(_Source const& __source)
{ return *this = path(__source); }
template<typename _Source>
__detail::_Path<_Source>&
assign(_Source const& __source)
{ return *this = path(__source); }
template<typename _InputIterator>
__detail::_Path<_InputIterator, _InputIterator>&
assign(_InputIterator __first, _InputIterator __last)
{ return *this = path(__first, __last); }
// appends
path& operator/=(const path& __p);
template<typename _Source>
__detail::_Path<_Source>&
operator/=(_Source const& __source)
{
_M_append(_S_convert(__detail::_S_range_begin(__source),
__detail::_S_range_end(__source)));
return *this;
}
template<typename _Source>
__detail::_Path<_Source>&
append(_Source const& __source)
{
_M_append(_S_convert(__detail::_S_range_begin(__source),
__detail::_S_range_end(__source)));
return *this;
}
template<typename _InputIterator>
__detail::_Path<_InputIterator, _InputIterator>&
append(_InputIterator __first, _InputIterator __last)
{
_M_append(_S_convert(__first, __last));
return *this;
}
// 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>
__detail::_Path<_Source>&
operator+=(_Source const& __x) { return concat(__x); }
template<typename _CharT>
__detail::_Path<_CharT*, _CharT*>&
operator+=(_CharT __x);
template<typename _Source>
__detail::_Path<_Source>&
concat(_Source const& __x)
{
_M_concat(_S_convert(__detail::_S_range_begin(__x),
__detail::_S_range_end(__x)));
return *this;
}
template<typename _InputIterator>
__detail::_Path<_InputIterator, _InputIterator>&
concat(_InputIterator __first, _InputIterator __last)
{
_M_concat(_S_convert(__first, __last));
return *this;
}
// 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
#ifdef _GLIBCXX_USE_CHAR8_T
__attribute__((__abi_tag__("__u8")))
std::u8string u8string() const;
#else
std::string u8string() const;
#endif // _GLIBCXX_USE_CHAR8_T
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
#ifdef _GLIBCXX_USE_CHAR8_T
__attribute__((__abi_tag__("__u8")))
std::u8string generic_u8string() const;
#else
std::string generic_u8string() const;
#endif // _GLIBCXX_USE_CHAR8_T
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 noexcept;
int compare(const value_type* __s) const noexcept;
int compare(basic_string_view<value_type> __s) const noexcept;
// 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 noexcept;
bool has_root_directory() const noexcept;
bool has_root_path() const noexcept;
bool has_relative_path() const noexcept;
bool has_parent_path() const noexcept;
bool has_filename() const noexcept;
bool has_stem() const noexcept;
bool has_extension() const noexcept;
bool is_absolute() const noexcept;
bool is_relative() const noexcept { 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;
using const_iterator = iterator;
iterator begin() const;
iterator end() const;
/// Write a path to a stream
template<typename _CharT, typename _Traits>
friend std::basic_ostream<_CharT, _Traits>&
operator<<(std::basic_ostream<_CharT, _Traits>& __os, const path& __p)
{
__os << std::quoted(__p.string<_CharT, _Traits>());
return __os;
}
/// Read a path from a stream
template<typename _CharT, typename _Traits>
friend std::basic_istream<_CharT, _Traits>&
operator>>(std::basic_istream<_CharT, _Traits>& __is, path& __p)
{
std::basic_string<_CharT, _Traits> __tmp;
if (__is >> std::quoted(__tmp))
__p = std::move(__tmp);
return __is;
}
// non-member operators
/// Compare paths
friend bool operator==(const path& __lhs, const path& __rhs) noexcept
{ return __lhs.compare(__rhs) == 0; }
#if __cpp_lib_three_way_comparison
/// Compare paths
friend strong_ordering
operator<=>(const path& __lhs, const path& __rhs) noexcept
{ return __lhs.compare(__rhs) <=> 0; }
#else
/// Compare paths
friend bool operator!=(const path& __lhs, const path& __rhs) noexcept
{ return !(__lhs == __rhs); }
/// Compare paths
friend bool operator<(const path& __lhs, const path& __rhs) noexcept
{ return __lhs.compare(__rhs) < 0; }
/// Compare paths
friend bool operator<=(const path& __lhs, const path& __rhs) noexcept
{ return !(__rhs < __lhs); }
/// Compare paths
friend bool operator>(const path& __lhs, const path& __rhs) noexcept
{ return __rhs < __lhs; }
/// Compare paths
friend bool operator>=(const path& __lhs, const path& __rhs) noexcept
{ return !(__lhs < __rhs); }
#endif
/// Append one path to another
friend path operator/(const path& __lhs, const path& __rhs)
{
path __result(__lhs);
__result /= __rhs;
return __result;
}
/// @cond undocumented
// Create a basic_string by reading until a null character.
template<typename _InputIterator,
typename _Traits = std::iterator_traits<_InputIterator>,
typename _CharT
= typename std::remove_cv_t<typename _Traits::value_type>>
static std::basic_string<_CharT>
_S_string_from_iter(_InputIterator __source)
{
std::basic_string<_CharT> __str;
for (_CharT __ch = *__source; __ch != _CharT(); __ch = *++__source)
__str.push_back(__ch);
return __str;
}
/// @endcond
private:
enum class _Type : unsigned char {
_Multi = 0, _Root_name, _Root_dir, _Filename
};
path(basic_string_view<value_type> __str, _Type __type)
: _M_pathname(__str)
{
__glibcxx_assert(__type != _Type::_Multi);
_M_cmpts.type(__type);
}
enum class _Split { _Stem, _Extension };
void _M_append(basic_string_view<value_type>);
void _M_concat(basic_string_view<value_type>);
pair<const string_type*, size_t> _M_find_extension() const noexcept;
template<typename _CharT>
struct _Cvt;
static basic_string_view<value_type>
_S_convert(value_type* __src, __detail::__null_terminated)
{ return __src; }
static basic_string_view<value_type>
_S_convert(const value_type* __src, __detail::__null_terminated)
{ return __src; }
static basic_string_view<value_type>
_S_convert(value_type* __first, value_type* __last)
{ return {__first, __last - __first}; }
static basic_string_view<value_type>
_S_convert(const value_type* __first, const value_type* __last)
{ return {__first, __last - __first}; }
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, __detail::__null_terminated)
{
// Read from iterator into basic_string until a null value is seen:
auto __s = _S_string_from_iter(__src);
// Convert (if needed) from iterator's value type to path::value_type:
return string_type(_S_convert(__s.data(), __s.data() + __s.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, __detail::__null_terminated,
const std::locale& __loc)
{
const std::string __s = _S_string_from_iter(__src);
return _S_convert_loc(__s.data(), __s.data() + __s.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&);
void _M_split_cmpts();
_Type _M_type() const noexcept { return _M_cmpts.type(); }
string_type _M_pathname;
struct _Cmpt;
struct _List
{
using value_type = _Cmpt;
using iterator = value_type*;
using const_iterator = const value_type*;
_List();
_List(const _List&);
_List(_List&&) = default;
_List& operator=(const _List&);
_List& operator=(_List&&) = default;
~_List() = default;
_Type type() const noexcept
{ return _Type(reinterpret_cast<uintptr_t>(_M_impl.get()) & 0x3); }
void type(_Type) noexcept;
int size() const noexcept; // zero unless type() == _Type::_Multi
bool empty() const noexcept; // true unless type() == _Type::_Multi
void clear();
void swap(_List& __l) noexcept { _M_impl.swap(__l._M_impl); }
int capacity() const noexcept;
void reserve(int, bool); ///< @pre type() == _Type::_Multi
// All the member functions below here have a precondition !empty()
// (and they should only be called from within the library).
iterator begin() noexcept;
iterator end() noexcept;
const_iterator begin() const noexcept;
const_iterator end() const noexcept;
value_type& front() noexcept;
value_type& back() noexcept;
const value_type& front() const noexcept;
const value_type& back() const noexcept;
void pop_back();
void _M_erase_from(const_iterator __pos); // erases [__pos,end())
struct _Impl;
struct _Impl_deleter
{
void operator()(_Impl*) const noexcept;
};
unique_ptr<_Impl, _Impl_deleter> _M_impl;
};
_List _M_cmpts;
struct _Parser;
};
/// @relates std::filesystem::path @{
inline void swap(path& __lhs, path& __rhs) noexcept { __lhs.swap(__rhs); }
size_t hash_value(const path& __p) noexcept;
/// @}
/// Exception type thrown by the Filesystem library
class filesystem_error : public std::system_error
{
public:
filesystem_error(const string& __what_arg, error_code __ec);
filesystem_error(const string& __what_arg, const path& __p1,
error_code __ec);
filesystem_error(const string& __what_arg, const path& __p1,
const path& __p2, error_code __ec);
filesystem_error(const filesystem_error&) = default;
filesystem_error& operator=(const filesystem_error&) = default;
// No move constructor or assignment operator.
// Copy rvalues instead, so that _M_impl is not left empty.
~filesystem_error();
const path& path1() const noexcept;
const path& path2() const noexcept;
const char* what() const noexcept;
private:
struct _Impl;
std::__shared_ptr<const _Impl> _M_impl;
};
/** Create a path from a UTF-8-encoded sequence of char
*
* @relates std::filesystem::path
*/
template<typename _InputIterator,
typename _Require = __detail::_Path<_InputIterator, _InputIterator>,
typename _CharT
= __detail::__value_type_is_char_or_char8_t<_InputIterator>>
inline path
u8path(_InputIterator __first, _InputIterator __last)
{
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
if constexpr (is_same_v<_CharT, char>)
{
// XXX This assumes native wide encoding is UTF-16.
std::codecvt_utf8_utf16<path::value_type> __cvt;
path::string_type __tmp;
if constexpr (is_pointer_v<_InputIterator>)
{
if (__str_codecvt_in_all(__first, __last, __tmp, __cvt))
return path{ __tmp };
}
else
{
const std::string __u8str{__first, __last};
const char* const __p = __u8str.data();
if (__str_codecvt_in_all(__p, __p + __u8str.size(), __tmp, __cvt))
return path{ __tmp };
}
_GLIBCXX_THROW_OR_ABORT(filesystem_error(
"Cannot convert character sequence",
std::make_error_code(errc::illegal_byte_sequence)));
}
else
return path{ __first, __last };
#else
// This assumes native normal encoding is UTF-8.
return path{ __first, __last };
#endif
}
/** Create a path from a UTF-8-encoded sequence of char
*
* @relates std::filesystem::path
*/
template<typename _Source,
typename _Require = __detail::_Path<_Source>,
typename _CharT = __detail::__value_type_is_char_or_char8_t<_Source>>
inline path
u8path(const _Source& __source)
{
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
if constexpr (is_same_v<_CharT, char>)
{
if constexpr (is_convertible_v<const _Source&, std::string_view>)
{
const std::string_view __s = __source;
return filesystem::u8path(__s.data(), __s.data() + __s.size());
}
else
{
std::string __s = path::_S_string_from_iter(__source);
return filesystem::u8path(__s.data(), __s.data() + __s.size());
}
}
else
return path{ __source };
#else
return path{ __source };
#endif
}
/// @cond undocumented
struct path::_Cmpt : path
{
_Cmpt(basic_string_view<value_type> __s, _Type __t, size_t __pos)
: path(__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}; }
};
#if !defined _GLIBCXX_FILESYSTEM_IS_WINDOWS && defined _GLIBCXX_USE_CHAR8_T
// For POSIX converting from char8_t to char is also 'noconv'
template<>
struct path::_Cvt<char8_t>
{
template<typename _Iter>
static string_type
_S_convert(_Iter __first, _Iter __last)
{ return string_type(__first, __last); }
};
#endif
template<typename _CharT>
struct path::_Cvt
{
static string_type
_S_convert(const _CharT* __f, const _CharT* __l)
{
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
std::wstring __wstr;
if constexpr (is_same_v<_CharT, char>)
{
struct _UCvt : std::codecvt<wchar_t, char, std::mbstate_t>
{ } __cvt;
if (__str_codecvt_in_all(__f, __l, __wstr, __cvt))
return __wstr;
}
#ifdef _GLIBCXX_USE_CHAR8_T
else if constexpr (is_same_v<_CharT, char8_t>)
{
const char* __f2 = (const char*)__f;
const char* __l2 = (const char*)__l;
std::codecvt_utf8_utf16<wchar_t> __wcvt;
if (__str_codecvt_in_all(__f2, __l2, __wstr, __wcvt))
return __wstr;
}
#endif
else // char16_t or char32_t
{
struct _UCvt : std::codecvt<_CharT, char, std::mbstate_t>
{ } __cvt;
std::string __str;
if (__str_codecvt_out_all(__f, __l, __str, __cvt))
{
const char* __f2 = __str.data();
const char* __l2 = __f2 + __str.size();
std::codecvt_utf8_utf16<wchar_t> __wcvt;
if (__str_codecvt_in_all(__f2, __l2, __wstr, __wcvt))
return __wstr;
}
}
#else // ! windows
struct _UCvt : std::codecvt<_CharT, char, std::mbstate_t>
{ } __cvt;
std::string __str;
if (__str_codecvt_out_all(__f, __l, __str, __cvt))
return __str;
#endif
_GLIBCXX_THROW_OR_ABORT(filesystem_error(
"Cannot convert character sequence",
std::make_error_code(errc::illegal_byte_sequence)));
}
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()); }
};
/// @endcond
/// 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;
bool _M_is_multi() const { return _M_path->_M_type() == _Type::_Multi; }
friend difference_type
__path_iter_distance(const iterator& __first, const iterator& __last)
{
__glibcxx_assert(__first._M_path != nullptr);
__glibcxx_assert(__first._M_path == __last._M_path);
if (__first._M_is_multi())
return std::distance(__first._M_cur, __last._M_cur);
else if (__first._M_at_end == __last._M_at_end)
return 0;
else
return __first._M_at_end ? -1 : 1;
}
friend void
__path_iter_advance(iterator& __i, difference_type __n)
{
if (__n == 1)
++__i;
else if (__n == -1)
--__i;
else if (__n != 0)
{
__glibcxx_assert(__i._M_path != nullptr);
__glibcxx_assert(__i._M_is_multi());
// __glibcxx_assert(__i._M_path->_M_cmpts.end() - __i._M_cur >= __n);
__i._M_cur += __n;
}
}
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) [[__unlikely__]]
return *this;
_M_pathname = std::move(__p._M_pathname);
_M_cmpts = std::move(__p._M_cmpts);
__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 string_type& __x)
{
_M_concat(__x);
return *this;
}
inline path&
path::operator+=(const value_type* __x)
{
_M_concat(__x);
return *this;
}
inline path&
path::operator+=(value_type __x)
{
_M_concat(basic_string_view<value_type>(&__x, 1));
return *this;
}
inline path&
path::operator+=(basic_string_view<value_type> __x)
{
_M_concat(__x);
return *this;
}
template<typename _CharT>
inline __detail::_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);
}
/// @cond undocumented
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)
{
static_assert(!is_same_v<_CharT, value_type>);
using _WString = basic_string<_CharT, _Traits, _Allocator>;
if (__str.size() == 0)
return _WString(__a);
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
// First convert native string from UTF-16 to to UTF-8.
// XXX This assumes that the execution wide-character set is UTF-16.
std::codecvt_utf8_utf16<value_type> __cvt;
using _CharAlloc = __alloc_rebind<_Allocator, char>;
using _String = basic_string<char, char_traits<char>, _CharAlloc>;
_String __u8str{_CharAlloc{__a}};
const value_type* __wfirst = __str.data();
const value_type* __wlast = __wfirst + __str.size();
if (__str_codecvt_out_all(__wfirst, __wlast, __u8str, __cvt)) {
if constexpr (is_same_v<_CharT, char>)
return __u8str; // XXX assumes native ordinary encoding is UTF-8.
else {
const char* __first = __u8str.data();
const char* __last = __first + __u8str.size();
#else
const value_type* __first = __str.data();
const value_type* __last = __first + __str.size();
#endif
// Convert UTF-8 string to requested format.
#ifdef _GLIBCXX_USE_CHAR8_T
if constexpr (is_same_v<_CharT, char8_t>)
return _WString(__first, __last, __a);
else
#endif
{
// Convert UTF-8 to wide string.
_WString __wstr(__a);
struct _UCvt : std::codecvt<_CharT, char, std::mbstate_t> { } __cvt;
if (__str_codecvt_in_all(__first, __last, __wstr, __cvt))
return __wstr;
}
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
} }
#endif
_GLIBCXX_THROW_OR_ABORT(filesystem_error(
"Cannot convert character sequence",
std::make_error_code(errc::illegal_byte_sequence)));
}
/// @endcond
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>)
return { _M_pathname.c_str(), _M_pathname.length(), __a };
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
#ifdef _GLIBCXX_USE_CHAR8_T
inline std::u8string
path::u8string() const { return string<char8_t>(); }
#else
inline std::string
path::u8string() const
{
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
std::string __str;
// convert from native wide encoding (assumed to be UTF-16) to UTF-8
std::codecvt_utf8_utf16<value_type> __cvt;
const value_type* __first = _M_pathname.data();
const value_type* __last = __first + _M_pathname.size();
if (__str_codecvt_out_all(__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
}
#endif // _GLIBCXX_USE_CHAR8_T
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)
{
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
if (__elem._M_type() == _Type::_Root_dir)
{
__str += __slash;
continue;
}
#endif
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
#ifdef _GLIBCXX_USE_CHAR8_T
inline std::u8string
path::generic_u8string() const
{ return generic_string<char8_t>(); }
#else
inline std::string
path::generic_u8string() const
{ return generic_string(); }
#endif
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 noexcept
{ return compare(basic_string_view<value_type>(__s)); }
inline int
path::compare(const value_type* __s) const noexcept
{ return compare(basic_string_view<value_type>(__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 noexcept
{
auto ext = _M_find_extension();
return ext.first && ext.second != 0;
}
inline bool
path::has_extension() const noexcept
{
auto ext = _M_find_extension();
return ext.first && ext.second != string_type::npos;
}
inline bool
path::is_absolute() const noexcept
{
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
return has_root_name() && has_root_directory();
#else
return has_root_directory();
#endif
}
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
inline ptrdiff_t
distance(filesystem::path::iterator __first, filesystem::path::iterator __last)
{ return __path_iter_distance(__first, __last); }
template<typename _Distance>
void
advance(filesystem::path::iterator& __i, _Distance __n)
{ __path_iter_advance(__i, static_cast<ptrdiff_t>(__n)); }
extern template class __shared_ptr<const filesystem::filesystem_error::_Impl>;
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // C++17
#endif // _GLIBCXX_FS_PATH_H