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filesystem.hpp
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filesystem.hpp
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//---------------------------------------------------------------------------------------
//
// ghc::filesystem - A C++17-like filesystem implementation for C++11/C++14/C++17
//
//---------------------------------------------------------------------------------------
//
// Copyright (c) 2018, Steffen Schümann <s.schuemann@pobox.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
//---------------------------------------------------------------------------------------
//
// To dynamically select std::filesystem where available, you could use:
//
// #if defined(__cplusplus) && __cplusplus >= 201703L && defined(__has_include) && __has_include(<filesystem>)
// #include <filesystem>
// namespace fs = std::filesystem;
// #else
// #include <ghc/filesystem.hpp>
// namespace fs = ghc::filesystem;
// #endif
//
//---------------------------------------------------------------------------------------
#ifndef GHC_FILESYSTEM_H
#define GHC_FILESYSTEM_H
// #define BSD manifest constant only in
// sys/param.h
#ifndef _WIN32
#include <sys/param.h>
#endif
#ifndef GHC_OS_DETECTED
#if defined(__APPLE__) && defined(__MACH__)
#define GHC_OS_MACOS
#elif defined(__linux__)
#define GHC_OS_LINUX
#if defined(__ANDROID__)
#define GHC_OS_ANDROID
#endif
#elif defined(_WIN64)
#define GHC_OS_WINDOWS
#define GHC_OS_WIN64
#elif defined(_WIN32)
#define GHC_OS_WINDOWS
#define GHC_OS_WIN32
#elif defined(__svr4__)
#define GHC_OS_SYS5R4
#elif defined(BSD)
#define GHC_OS_BSD
#elif defined(__EMSCRIPTEN__)
#define GHC_OS_WEB
#include <wasi/api.h>
#else
#error "Operating system currently not supported!"
#endif
#define GHC_OS_DETECTED
#endif
#if defined(GHC_FILESYSTEM_IMPLEMENTATION)
#define GHC_EXPAND_IMPL
#define GHC_INLINE
#ifdef GHC_OS_WINDOWS
#define GHC_FS_API
#define GHC_FS_API_CLASS
#else
#define GHC_FS_API __attribute__((visibility("default")))
#define GHC_FS_API_CLASS __attribute__((visibility("default")))
#endif
#elif defined(GHC_FILESYSTEM_FWD)
#define GHC_INLINE
#ifdef GHC_OS_WINDOWS
#define GHC_FS_API extern
#define GHC_FS_API_CLASS
#else
#define GHC_FS_API extern
#define GHC_FS_API_CLASS
#endif
#else
#define GHC_EXPAND_IMPL
#define GHC_INLINE inline
#define GHC_FS_API
#define GHC_FS_API_CLASS
#endif
#ifdef GHC_EXPAND_IMPL
#ifdef GHC_OS_WINDOWS
#include <windows.h>
// additional includes
#include <shellapi.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <wchar.h>
#include <winioctl.h>
#else
#include <dirent.h>
#include <fcntl.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <limits.h>
#ifdef GHC_OS_ANDROID
#include <android/api-level.h>
#if __ANDROID_API__ < 12
#include <sys/syscall.h>
#endif
#include <sys/vfs.h>
#define statvfs statfs
#else
#include <sys/statvfs.h>
#endif
#if !defined(__ANDROID__) || __ANDROID_API__ >= 26
#include <langinfo.h>
#endif
#endif
#ifdef GHC_OS_MACOS
#include <Availability.h>
#endif
#include <algorithm>
#include <cctype>
#include <chrono>
#include <clocale>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <functional>
#include <memory>
#include <stack>
#include <stdexcept>
#include <string>
#include <system_error>
#include <type_traits>
#include <utility>
#include <vector>
#else // GHC_EXPAND_IMPL
#include <chrono>
#include <fstream>
#include <memory>
#include <stack>
#include <stdexcept>
#include <string>
#include <system_error>
#ifdef GHC_OS_WINDOWS
#include <vector>
#endif
#endif // GHC_EXPAND_IMPL
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Behaviour Switches (see README.md, should match the config in test/filesystem_test.cpp):
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// LWG #2682 disables the since then invalid use of the copy option create_symlinks on directories
// configure LWG conformance ()
#define LWG_2682_BEHAVIOUR
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// LWG #2395 makes crate_directory/create_directories not emit an error if there is a regular
// file with that name, it is superceded by P1164R1, so only activate if really needed
// #define LWG_2935_BEHAVIOUR
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// LWG #2937 enforces that fs::equivalent emits an error, if !fs::exists(p1)||!exists(p2)
#define LWG_2937_BEHAVIOUR
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// UTF8-Everywhere is the original behaviour of ghc::filesystem. With this define you can
// enable the more standard conforming implementation option that uses wstring on Windows
// as ghc::filesystem::string_type.
// #define GHC_WIN_WSTRING_STRING_TYPE
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Raise errors/exceptions when invalid unicode codepoints or UTF-8 sequences are found,
// instead of replacing them with the unicode replacement character (U+FFFD).
// #define GHC_RAISE_UNICODE_ERRORS
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// ghc::filesystem version in decimal (major * 10000 + minor * 100 + patch)
#define GHC_FILESYSTEM_VERSION 10304L
#if !defined(GHC_WITH_EXCEPTIONS) && (defined(__EXCEPTIONS) || defined(__cpp_exceptions) || defined(_CPPUNWIND))
#define GHC_WITH_EXCEPTIONS
#endif
#if !defined(GHC_WITH_EXCEPTIONS) && defined(GHC_RAISE_UNICODE_ERRORS)
#error "Can't raise unicode errors whith exception support disabled"
#endif
namespace ghc {
namespace filesystem {
// temporary existing exception type for yet unimplemented parts
class GHC_FS_API_CLASS not_implemented_exception : public std::logic_error
{
public:
not_implemented_exception()
: std::logic_error("function not implemented yet.")
{
}
};
template<typename char_type>
class path_helper_base
{
public:
using value_type = char_type;
#ifdef GHC_OS_WINDOWS
static constexpr value_type preferred_separator = '\\';
#else
static constexpr value_type preferred_separator = '/';
#endif
};
#if __cplusplus < 201703L
template <typename char_type>
constexpr char_type path_helper_base<char_type>::preferred_separator;
#endif
// 30.10.8 class path
class GHC_FS_API_CLASS path
#if defined(GHC_OS_WINDOWS) && defined(GHC_WIN_WSTRING_STRING_TYPE)
#define GHC_USE_WCHAR_T
: private path_helper_base<std::wstring::value_type>
{
public:
using path_helper_base<std::wstring::value_type>::value_type;
#else
: private path_helper_base<std::string::value_type>
{
public:
using path_helper_base<std::string::value_type>::value_type;
#endif
using string_type = std::basic_string<value_type>;
using path_helper_base<value_type>::preferred_separator;
// 30.10.10.1 enumeration format
/// The path format in wich the constructor argument is given.
enum format {
generic_format, ///< The generic format, internally used by
///< ghc::filesystem::path with slashes
native_format, ///< The format native to the current platform this code
///< is build for
auto_format, ///< Try to auto-detect the format, fallback to native
};
template <class T>
struct _is_basic_string : std::false_type
{
};
template <class CharT, class Traits, class Alloc>
struct _is_basic_string<std::basic_string<CharT, Traits, Alloc>> : std::true_type
{
};
#ifdef __cpp_lib_string_view
template <class CharT>
struct _is_basic_string<std::basic_string_view<CharT>> : std::true_type
{
};
#endif
template <typename T1, typename T2 = void>
using path_type = typename std::enable_if<!std::is_same<path, T1>::value, path>::type;
#ifdef GHC_USE_WCHAR_T
template <typename T>
using path_from_string = typename std::enable_if<_is_basic_string<T>::value || std::is_same<char const*, typename std::decay<T>::type>::value || std::is_same<char*, typename std::decay<T>::type>::value ||
std::is_same<wchar_t const*, typename std::decay<T>::type>::value || std::is_same<wchar_t*, typename std::decay<T>::type>::value,
path>::type;
template <typename T>
using path_type_EcharT = typename std::enable_if<std::is_same<T, char>::value || std::is_same<T, char16_t>::value || std::is_same<T, char32_t>::value, path>::type;
#else
template <typename T>
using path_from_string = typename std::enable_if<_is_basic_string<T>::value || std::is_same<char const*, typename std::decay<T>::type>::value || std::is_same<char*, typename std::decay<T>::type>::value, path>::type;
template <typename T>
using path_type_EcharT = typename std::enable_if<std::is_same<T, char>::value || std::is_same<T, char16_t>::value || std::is_same<T, char32_t>::value || std::is_same<T, wchar_t>::value, path>::type;
#endif
// 30.10.8.4.1 constructors and destructor
path() noexcept;
path(const path& p);
path(path&& p) noexcept;
path(string_type&& source, format fmt = auto_format);
template <class Source, typename = path_from_string<Source>>
path(const Source& source, format fmt = auto_format);
template <class InputIterator>
path(InputIterator first, InputIterator last, format fmt = auto_format);
#ifdef GHC_WITH_EXCEPTIONS
template <class Source, typename = path_from_string<Source>>
path(const Source& source, const std::locale& loc, format fmt = auto_format);
template <class InputIterator>
path(InputIterator first, InputIterator last, const std::locale& loc, format fmt = auto_format);
#endif
~path();
// 30.10.8.4.2 assignments
path& operator=(const path& p);
path& operator=(path&& p) noexcept;
path& operator=(string_type&& source);
path& assign(string_type&& source);
template <class Source>
path& operator=(const Source& source);
template <class Source>
path& assign(const Source& source);
template <class InputIterator>
path& assign(InputIterator first, InputIterator last);
// 30.10.8.4.3 appends
path& operator/=(const path& p);
template <class Source>
path& operator/=(const Source& source);
template <class Source>
path& append(const Source& source);
template <class InputIterator>
path& append(InputIterator first, InputIterator last);
// 30.10.8.4.4 concatenation
path& operator+=(const path& x);
path& operator+=(const string_type& x);
#ifdef __cpp_lib_string_view
path& operator+=(std::basic_string_view<value_type> x);
#endif
path& operator+=(const value_type* x);
path& operator+=(value_type x);
template <class Source>
path_from_string<Source>& operator+=(const Source& x);
template <class EcharT>
path_type_EcharT<EcharT>& operator+=(EcharT x);
template <class Source>
path& concat(const Source& x);
template <class InputIterator>
path& concat(InputIterator first, InputIterator last);
// 30.10.8.4.5 modifiers
void clear() noexcept;
path& make_preferred();
path& remove_filename();
path& replace_filename(const path& replacement);
path& replace_extension(const path& replacement = path());
void swap(path& rhs) noexcept;
// 30.10.8.4.6 native format observers
const string_type& native() const; // this implementation doesn't support noexcept for native()
const value_type* c_str() const; // this implementation doesn't support noexcept for c_str()
operator string_type() const;
template <class EcharT, class traits = std::char_traits<EcharT>, class Allocator = std::allocator<EcharT>>
std::basic_string<EcharT, traits, Allocator> string(const Allocator& a = Allocator()) const;
std::string string() const;
std::wstring wstring() const;
std::string u8string() const;
std::u16string u16string() const;
std::u32string u32string() const;
// 30.10.8.4.7 generic format observers
template <class EcharT, class traits = std::char_traits<EcharT>, class Allocator = std::allocator<EcharT>>
std::basic_string<EcharT, traits, Allocator> generic_string(const Allocator& a = Allocator()) const;
const std::string& generic_string() const; // this is different from the standard, that returns by value
std::wstring generic_wstring() const;
std::string generic_u8string() const;
std::u16string generic_u16string() const;
std::u32string generic_u32string() const;
// 30.10.8.4.8 compare
int compare(const path& p) const noexcept;
int compare(const string_type& s) const;
#ifdef __cpp_lib_string_view
int compare(std::basic_string_view<value_type> s) const;
#endif
int compare(const value_type* s) const;
// 30.10.8.4.9 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;
// 30.10.8.4.10 query
bool empty() const noexcept;
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;
// 30.10.8.4.11 generation
path lexically_normal() const;
path lexically_relative(const path& base) const;
path lexically_proximate(const path& base) const;
// 30.10.8.5 iterators
class iterator;
using const_iterator = iterator;
iterator begin() const;
iterator end() const;
private:
using impl_value_type = std::string::value_type;
using impl_string_type = std::basic_string<impl_value_type>;
friend class directory_iterator;
void append_name(const char* name);
static constexpr impl_value_type generic_separator = '/';
template <typename InputIterator>
class input_iterator_range
{
public:
typedef InputIterator iterator;
typedef InputIterator const_iterator;
typedef typename InputIterator::difference_type difference_type;
input_iterator_range(const InputIterator& first, const InputIterator& last)
: _first(first)
, _last(last)
{
}
InputIterator begin() const { return _first; }
InputIterator end() const { return _last; }
private:
InputIterator _first;
InputIterator _last;
};
friend void swap(path& lhs, path& rhs) noexcept;
friend size_t hash_value(const path& p) noexcept;
static void postprocess_path_with_format(impl_string_type& p, format fmt);
impl_string_type _path;
#ifdef GHC_OS_WINDOWS
impl_string_type native_impl() const;
mutable string_type _native_cache;
#else
const impl_string_type& native_impl() const;
#endif
};
// 30.10.8.6 path non-member functions
GHC_FS_API void swap(path& lhs, path& rhs) noexcept;
GHC_FS_API size_t hash_value(const path& p) noexcept;
GHC_FS_API bool operator==(const path& lhs, const path& rhs) noexcept;
GHC_FS_API bool operator!=(const path& lhs, const path& rhs) noexcept;
GHC_FS_API bool operator<(const path& lhs, const path& rhs) noexcept;
GHC_FS_API bool operator<=(const path& lhs, const path& rhs) noexcept;
GHC_FS_API bool operator>(const path& lhs, const path& rhs) noexcept;
GHC_FS_API bool operator>=(const path& lhs, const path& rhs) noexcept;
GHC_FS_API path operator/(const path& lhs, const path& rhs);
// 30.10.8.6.1 path inserter and extractor
template <class charT, class traits>
std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& os, const path& p);
template <class charT, class traits>
std::basic_istream<charT, traits>& operator>>(std::basic_istream<charT, traits>& is, path& p);
// 30.10.8.6.2 path factory functions
template <class Source, typename = path::path_from_string<Source>>
path u8path(const Source& source);
template <class InputIterator>
path u8path(InputIterator first, InputIterator last);
// 30.10.9 class filesystem_error
class GHC_FS_API_CLASS filesystem_error : public std::system_error
{
public:
filesystem_error(const std::string& what_arg, std::error_code ec);
filesystem_error(const std::string& what_arg, const path& p1, std::error_code ec);
filesystem_error(const std::string& what_arg, const path& p1, const path& p2, std::error_code ec);
const path& path1() const noexcept;
const path& path2() const noexcept;
const char* what() const noexcept override;
private:
std::string _what_arg;
std::error_code _ec;
path _p1, _p2;
};
class GHC_FS_API_CLASS path::iterator
{
public:
using value_type = const path;
using difference_type = std::ptrdiff_t;
using pointer = const path*;
using reference = const path&;
using iterator_category = std::bidirectional_iterator_tag;
iterator();
iterator(const impl_string_type::const_iterator& first, const impl_string_type::const_iterator& last, const impl_string_type::const_iterator& pos);
iterator& operator++();
iterator operator++(int);
iterator& operator--();
iterator operator--(int);
bool operator==(const iterator& other) const;
bool operator!=(const iterator& other) const;
reference operator*() const;
pointer operator->() const;
private:
impl_string_type::const_iterator increment(const std::string::const_iterator& pos) const;
impl_string_type::const_iterator decrement(const std::string::const_iterator& pos) const;
void updateCurrent();
impl_string_type::const_iterator _first;
impl_string_type::const_iterator _last;
impl_string_type::const_iterator _root;
impl_string_type::const_iterator _iter;
path _current;
};
struct space_info
{
uintmax_t capacity;
uintmax_t free;
uintmax_t available;
};
// 30.10.10, enumerations
enum class file_type {
none,
not_found,
regular,
directory,
symlink,
block,
character,
fifo,
socket,
unknown,
};
enum class perms : uint16_t {
none = 0,
owner_read = 0400,
owner_write = 0200,
owner_exec = 0100,
owner_all = 0700,
group_read = 040,
group_write = 020,
group_exec = 010,
group_all = 070,
others_read = 04,
others_write = 02,
others_exec = 01,
others_all = 07,
all = 0777,
set_uid = 04000,
set_gid = 02000,
sticky_bit = 01000,
mask = 07777,
unknown = 0xffff
};
enum class perm_options : uint16_t {
replace = 3,
add = 1,
remove = 2,
nofollow = 4,
};
enum class copy_options : uint16_t {
none = 0,
skip_existing = 1,
overwrite_existing = 2,
update_existing = 4,
recursive = 8,
copy_symlinks = 0x10,
skip_symlinks = 0x20,
directories_only = 0x40,
create_symlinks = 0x80,
#ifndef GHC_OS_WEB
create_hard_links = 0x100
#endif
};
enum class directory_options : uint16_t {
none = 0,
follow_directory_symlink = 1,
skip_permission_denied = 2,
};
// 30.10.11 class file_status
class GHC_FS_API_CLASS file_status
{
public:
// 30.10.11.1 constructors and destructor
file_status() noexcept;
explicit file_status(file_type ft, perms prms = perms::unknown) noexcept;
file_status(const file_status&) noexcept;
file_status(file_status&&) noexcept;
~file_status();
// assignments:
file_status& operator=(const file_status&) noexcept;
file_status& operator=(file_status&&) noexcept;
// 30.10.11.3 modifiers
void type(file_type ft) noexcept;
void permissions(perms prms) noexcept;
// 30.10.11.2 observers
file_type type() const noexcept;
perms permissions() const noexcept;
private:
file_type _type;
perms _perms;
};
using file_time_type = std::chrono::time_point<std::chrono::system_clock>;
// 30.10.12 Class directory_entry
class GHC_FS_API_CLASS directory_entry
{
public:
// 30.10.12.1 constructors and destructor
directory_entry() noexcept = default;
directory_entry(const directory_entry&) = default;
directory_entry(directory_entry&&) noexcept = default;
#ifdef GHC_WITH_EXCEPTIONS
explicit directory_entry(const path& p);
#endif
directory_entry(const path& p, std::error_code& ec);
~directory_entry();
// assignments:
directory_entry& operator=(const directory_entry&) = default;
directory_entry& operator=(directory_entry&&) noexcept = default;
// 30.10.12.2 modifiers
#ifdef GHC_WITH_EXCEPTIONS
void assign(const path& p);
#endif
void assign(const path& p, std::error_code& ec);
#ifdef GHC_WITH_EXCEPTIONS
void replace_filename(const path& p);
#endif
void replace_filename(const path& p, std::error_code& ec);
#ifdef GHC_WITH_EXCEPTIONS
void refresh();
#endif
void refresh(std::error_code& ec) noexcept;
// 30.10.12.3 observers
const filesystem::path& path() const noexcept;
operator const filesystem::path&() const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
bool exists() const;
#endif
bool exists(std::error_code& ec) const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
bool is_block_file() const;
#endif
bool is_block_file(std::error_code& ec) const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
bool is_character_file() const;
#endif
bool is_character_file(std::error_code& ec) const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
bool is_directory() const;
#endif
bool is_directory(std::error_code& ec) const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
bool is_fifo() const;
#endif
bool is_fifo(std::error_code& ec) const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
bool is_other() const;
#endif
bool is_other(std::error_code& ec) const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
bool is_regular_file() const;
#endif
bool is_regular_file(std::error_code& ec) const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
bool is_socket() const;
#endif
bool is_socket(std::error_code& ec) const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
bool is_symlink() const;
#endif
bool is_symlink(std::error_code& ec) const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
uintmax_t file_size() const;
#endif
uintmax_t file_size(std::error_code& ec) const noexcept;
#ifndef GHC_OS_WEB
#ifdef GHC_WITH_EXCEPTIONS
uintmax_t hard_link_count() const;
#endif
uintmax_t hard_link_count(std::error_code& ec) const noexcept;
#endif
#ifdef GHC_WITH_EXCEPTIONS
file_time_type last_write_time() const;
#endif
file_time_type last_write_time(std::error_code& ec) const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
file_status status() const;
#endif
file_status status(std::error_code& ec) const noexcept;
#ifdef GHC_WITH_EXCEPTIONS
file_status symlink_status() const;
#endif
file_status symlink_status(std::error_code& ec) const noexcept;
bool operator<(const directory_entry& rhs) const noexcept;
bool operator==(const directory_entry& rhs) const noexcept;
bool operator!=(const directory_entry& rhs) const noexcept;
bool operator<=(const directory_entry& rhs) const noexcept;
bool operator>(const directory_entry& rhs) const noexcept;
bool operator>=(const directory_entry& rhs) const noexcept;
private:
friend class directory_iterator;
filesystem::path _path;
file_status _status;
file_status _symlink_status;
uintmax_t _file_size = 0;
#ifndef GHC_OS_WINDOWS
uintmax_t _hard_link_count = 0;
#endif
time_t _last_write_time = 0;
};
// 30.10.13 Class directory_iterator
class GHC_FS_API_CLASS directory_iterator
{
public:
class GHC_FS_API_CLASS proxy
{
public:
const directory_entry& operator*() const& noexcept { return _dir_entry; }
directory_entry operator*() && noexcept { return std::move(_dir_entry); }
private:
explicit proxy(const directory_entry& dir_entry)
: _dir_entry(dir_entry)
{
}
friend class directory_iterator;
friend class recursive_directory_iterator;
directory_entry _dir_entry;
};
using iterator_category = std::input_iterator_tag;
using value_type = directory_entry;
using difference_type = std::ptrdiff_t;
using pointer = const directory_entry*;
using reference = const directory_entry&;
// 30.10.13.1 member functions
directory_iterator() noexcept;
#ifdef GHC_WITH_EXCEPTIONS
explicit directory_iterator(const path& p);
directory_iterator(const path& p, directory_options options);
#endif
directory_iterator(const path& p, std::error_code& ec) noexcept;
directory_iterator(const path& p, directory_options options, std::error_code& ec) noexcept;
directory_iterator(const directory_iterator& rhs);
directory_iterator(directory_iterator&& rhs) noexcept;
~directory_iterator();
directory_iterator& operator=(const directory_iterator& rhs);
directory_iterator& operator=(directory_iterator&& rhs) noexcept;
const directory_entry& operator*() const;
const directory_entry* operator->() const;
#ifdef GHC_WITH_EXCEPTIONS
directory_iterator& operator++();
#endif
directory_iterator& increment(std::error_code& ec) noexcept;
// other members as required by 27.2.3, input iterators
#ifdef GHC_WITH_EXCEPTIONS
proxy operator++(int)
{
proxy p{**this};
++*this;
return p;
}
#endif
bool operator==(const directory_iterator& rhs) const;
bool operator!=(const directory_iterator& rhs) const;
private:
friend class recursive_directory_iterator;
class impl;
std::shared_ptr<impl> _impl;
};
// 30.10.13.2 directory_iterator non-member functions
GHC_FS_API directory_iterator begin(directory_iterator iter) noexcept;
GHC_FS_API directory_iterator end(const directory_iterator&) noexcept;
// 30.10.14 class recursive_directory_iterator
class GHC_FS_API_CLASS recursive_directory_iterator
{
public:
using iterator_category = std::input_iterator_tag;
using value_type = directory_entry;
using difference_type = std::ptrdiff_t;
using pointer = const directory_entry*;
using reference = const directory_entry&;
// 30.10.14.1 constructors and destructor
recursive_directory_iterator() noexcept;
#ifdef GHC_WITH_EXCEPTIONS
explicit recursive_directory_iterator(const path& p);
recursive_directory_iterator(const path& p, directory_options options);
#endif
recursive_directory_iterator(const path& p, directory_options options, std::error_code& ec) noexcept;
recursive_directory_iterator(const path& p, std::error_code& ec) noexcept;
recursive_directory_iterator(const recursive_directory_iterator& rhs);
recursive_directory_iterator(recursive_directory_iterator&& rhs) noexcept;
~recursive_directory_iterator();
// 30.10.14.1 observers
directory_options options() const;
int depth() const;
bool recursion_pending() const;
const directory_entry& operator*() const;
const directory_entry* operator->() const;
// 30.10.14.1 modifiers recursive_directory_iterator&
recursive_directory_iterator& operator=(const recursive_directory_iterator& rhs);
recursive_directory_iterator& operator=(recursive_directory_iterator&& rhs) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
recursive_directory_iterator& operator++();
#endif
recursive_directory_iterator& increment(std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
void pop();
#endif
void pop(std::error_code& ec);
void disable_recursion_pending();
// other members as required by 27.2.3, input iterators
#ifdef GHC_WITH_EXCEPTIONS
directory_iterator::proxy operator++(int)
{
directory_iterator::proxy proxy{**this};
++*this;
return proxy;
}
#endif
bool operator==(const recursive_directory_iterator& rhs) const;
bool operator!=(const recursive_directory_iterator& rhs) const;
private:
struct recursive_directory_iterator_impl
{
directory_options _options;
bool _recursion_pending;
std::stack<directory_iterator> _dir_iter_stack;
recursive_directory_iterator_impl(directory_options options, bool recursion_pending)
: _options(options)
, _recursion_pending(recursion_pending)
{
}
};
std::shared_ptr<recursive_directory_iterator_impl> _impl;
};
// 30.10.14.2 directory_iterator non-member functions
GHC_FS_API recursive_directory_iterator begin(recursive_directory_iterator iter) noexcept;
GHC_FS_API recursive_directory_iterator end(const recursive_directory_iterator&) noexcept;
// 30.10.15 filesystem operations
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API path absolute(const path& p);
#endif
GHC_FS_API path absolute(const path& p, std::error_code& ec);
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API path canonical(const path& p);
#endif
GHC_FS_API path canonical(const path& p, std::error_code& ec);
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API void copy(const path& from, const path& to);
#endif
GHC_FS_API void copy(const path& from, const path& to, std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API void copy(const path& from, const path& to, copy_options options);
#endif
GHC_FS_API void copy(const path& from, const path& to, copy_options options, std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API bool copy_file(const path& from, const path& to);
#endif
GHC_FS_API bool copy_file(const path& from, const path& to, std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API bool copy_file(const path& from, const path& to, copy_options option);
#endif
GHC_FS_API bool copy_file(const path& from, const path& to, copy_options option, std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API void copy_symlink(const path& existing_symlink, const path& new_symlink);
#endif
GHC_FS_API void copy_symlink(const path& existing_symlink, const path& new_symlink, std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API bool create_directories(const path& p);
#endif
GHC_FS_API bool create_directories(const path& p, std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API bool create_directory(const path& p);
#endif
GHC_FS_API bool create_directory(const path& p, std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API bool create_directory(const path& p, const path& attributes);
#endif
GHC_FS_API bool create_directory(const path& p, const path& attributes, std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API void create_directory_symlink(const path& to, const path& new_symlink);
#endif
GHC_FS_API void create_directory_symlink(const path& to, const path& new_symlink, std::error_code& ec) noexcept;
#ifndef GHC_OS_WEB
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API void create_hard_link(const path& to, const path& new_hard_link);
#endif
GHC_FS_API void create_hard_link(const path& to, const path& new_hard_link, std::error_code& ec) noexcept;
#endif
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API void create_symlink(const path& to, const path& new_symlink);
#endif
GHC_FS_API void create_symlink(const path& to, const path& new_symlink, std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API path current_path();
#endif
GHC_FS_API path current_path(std::error_code& ec);
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API void current_path(const path& p);
#endif
GHC_FS_API void current_path(const path& p, std::error_code& ec) noexcept;
GHC_FS_API bool exists(file_status s) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API bool exists(const path& p);
#endif
GHC_FS_API bool exists(const path& p, std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API bool equivalent(const path& p1, const path& p2);
#endif
GHC_FS_API bool equivalent(const path& p1, const path& p2, std::error_code& ec) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API uintmax_t file_size(const path& p);
#endif
GHC_FS_API uintmax_t file_size(const path& p, std::error_code& ec) noexcept;
#ifndef GHC_OS_WEB
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API uintmax_t hard_link_count(const path& p);
#endif
GHC_FS_API uintmax_t hard_link_count(const path& p, std::error_code& ec) noexcept;
#endif
GHC_FS_API bool is_block_file(file_status s) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API bool is_block_file(const path& p);
#endif
GHC_FS_API bool is_block_file(const path& p, std::error_code& ec) noexcept;
GHC_FS_API bool is_character_file(file_status s) noexcept;
#ifdef GHC_WITH_EXCEPTIONS
GHC_FS_API bool is_character_file(const path& p);
#endif
GHC_FS_API bool is_character_file(const path& p, std::error_code& ec) noexcept;
GHC_FS_API bool is_directory(file_status s) noexcept;