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Retro68/gcc/libstdc++-v3/include/experimental/bits/fs_path.h
Wolfgang Thaller 65c83606fb Update gcc to 7.2.0, binutils to 2.29, newlib to 2.5.0
2017-10-07 02:16:47 +02:00

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// Class filesystem::path -*- C++ -*-
// Copyright (C) 2014-2017 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 experimental/bits/fs_path.h
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{experimental/filesystem}
*/
#ifndef _GLIBCXX_EXPERIMENTAL_FS_PATH_H
#define _GLIBCXX_EXPERIMENTAL_FS_PATH_H 1
#if __cplusplus < 201103L
# include <bits/c++0x_warning.h>
#else
#include <utility>
#include <type_traits>
#include <vector>
#include <locale>
#include <iosfwd>
#include <codecvt>
#include <system_error>
#include <bits/stl_algobase.h>
#include <bits/quoted_string.h>
#include <bits/locale_conv.h>
#if __cplusplus == 201402L
# include <experimental/string_view>
#endif
#if defined(_WIN32) && !defined(__CYGWIN__)
# define _GLIBCXX_FILESYSTEM_IS_WINDOWS 1
# include <algorithm>
#endif
namespace std _GLIBCXX_VISIBILITY(default)
{
namespace experimental
{
namespace filesystem
{
inline namespace v1
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
_GLIBCXX_BEGIN_NAMESPACE_CXX11
#if __cplusplus == 201402L
using std::experimental::basic_string_view;
#elif __cplusplus > 201402L
using std::basic_string_view;
#endif
/**
* @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);
#if __cplusplus >= 201402L
template<typename _CharT, typename _Traits>
static __is_encoded_char<_CharT>
__is_path_src(const basic_string_view<_CharT, _Traits>&, int);
#endif
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<_Tp1, path>>,
__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(); }
#if __cplusplus >= 201402L
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(); }
#endif
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;
// 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)
{
_M_split_cmpts();
__p.clear();
}
path(string_type&& __source)
: _M_pathname(std::move(__source))
{ _M_split_cmpts(); }
template<typename _Source,
typename _Require = _Path<_Source>>
path(_Source const& __source)
: _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)
: _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)
: _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)
: _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) { return _M_append(__p._M_pathname); }
template <class _Source>
_Path<_Source>&
operator/=(_Source const& __source)
{ return append(__source); }
template<typename _Source>
_Path<_Source>&
append(_Source const& __source)
{
return _M_append(_S_convert(_S_range_begin(__source),
_S_range_end(__source)));
}
template<typename _InputIterator>
_Path<_InputIterator, _InputIterator>&
append(_InputIterator __first, _InputIterator __last)
{ return _M_append(_S_convert(__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);
#if __cplusplus >= 201402L
path& operator+=(basic_string_view<value_type> __x);
#endif
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;
#if __cplusplus >= 201402L
int compare(const basic_string_view<value_type> __s) const;
#endif
// 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
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;
bool is_relative() const { return !is_absolute(); }
// 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(!empty());
__glibcxx_assert(_M_type != _Type::_Multi);
}
enum class _Split { _Stem, _Extension };
path& _M_append(const string_type& __str)
{
if (!_M_pathname.empty() && !_S_is_dir_sep(_M_pathname.back())
&& !__str.empty() && !_S_is_dir_sep(__str.front()))
_M_pathname += preferred_separator;
_M_pathname += __str;
_M_split_cmpts();
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);
}
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::_Multi;
};
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)
{ return path(__lhs) /= __rhs; }
/// 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;
}
// TODO constrain with _Path<Source> and __value_type_is_char
template<typename _Source>
inline path
u8path(const _Source& __source)
{
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
return path{ path::string_type{__source} };
#else
return path{ __source };
#endif
}
// TODO constrain with _Path<InputIterator, InputIterator> and __value_type_is_char
template<typename _InputIterator>
inline path
u8path(_InputIterator __first, _InputIterator __last)
{
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
return path{ path::string_type{__first, __last} };
#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();
};
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> { };
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; ++_M_cur; return __tmp; }
iterator& operator--();
iterator operator--(int) { auto __tmp = *this; --_M_cur; 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
{
_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;
}
#if __cplusplus >= 201402L
inline path&
path::operator+=(basic_string_view<value_type> __x)
{
_M_pathname.append(__x.data(), __x.size());
_M_split_cmpts();
return *this;
}
#endif
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>
inline std::basic_string<_CharT, _Traits, _Allocator>
path::string(const _Allocator& __a) const
{
if (is_same<_CharT, value_type>::value)
return { _M_pathname.begin(), _M_pathname.end(), __a };
const value_type* __first = _M_pathname.data();
const value_type* __last = __first + _M_pathname.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))
{
struct
{
const _String*
operator()(const _String& __from, _String&, true_type)
{ return std::__addressof(__from); }
_WString*
operator()(const _String& __from, _WString& __to, false_type)
{
// use codecvt_utf8<_CharT> to convert UTF-8 to wide string
codecvt_utf8<_CharT> __cvt;
const char* __f = __from.data();
const char* __l = __f + __from.size();
if (__str_codecvt_in(__f, __l, __to, __cvt))
return std::__addressof(__to);
return nullptr;
}
} __dispatch;
_WString __wstr;
if (auto* __p = __dispatch(__u8str, __wstr, is_same<_CharT, char>{}))
return *__p;
}
#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)));
}
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>(); }
#ifndef _GLIBCXX_FILESYSTEM_IS_WINDOWS
template<typename _CharT, typename _Traits, typename _Allocator>
inline std::basic_string<_CharT, _Traits, _Allocator>
path::generic_string(const _Allocator& __a) const
{ return string<_CharT, _Traits, _Allocator>(__a); }
inline std::string
path::generic_string() const { return string(); }
#if _GLIBCXX_USE_WCHAR_T
inline std::wstring
path::generic_wstring() const { return wstring(); }
#endif
inline std::string
path::generic_u8string() const { return u8string(); }
inline std::u16string
path::generic_u16string() const { return u16string(); }
inline std::u32string
path::generic_u32string() const { return u32string(); }
#endif
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)); }
#if __cplusplus >= 201402L
inline int
path::compare(basic_string_view<value_type> __s) const
{ return compare(path(__s)); }
#endif
inline path
path::filename() const { return empty() ? path() : *--end(); }
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 bool
path::is_absolute() const
{
#ifdef _GLIBCXX_FILESYSTEM_IS_WINDOWS
return has_root_name();
#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, false);
}
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
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace v1
} // namespace filesystem
} // namespace experimental
} // namespace std
#endif // C++11
#endif // _GLIBCXX_EXPERIMENTAL_FS_PATH_H
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