From 0d69b72097c3899935d9dd2abf831d5badf90ee5 Mon Sep 17 00:00:00 2001 From: chrisweir Date: Wed, 15 Apr 2020 11:01:20 -0700 Subject: [PATCH] Undo symlinked libc++fs Several features for auto need libc++fs, but the previous solution of symlinking to external/libcxx would cause problems later down the line. Instead, we will compile a separate version of libc++fs with a different namespace, as to not interfere with the canonical std::filesystem. Change summary =============================================================== directory_iterator.cpp: ----------------------- * _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM --> namespace android::hardware::automotive::filesystem { * _LIBCPP_END_NAMESPACE_FILESYSTEM --> } // namespace android::hardware::automotive::filesystem * disable clang-format (to reduce diff size) * "" --> <> for non-local includes filesystem_common.h: -------------------- * FILESYSTEM_COMMON_H --> AUTO_FILESYSTEM_COMMON_H * "" --> <> for non-local includes * filesystem --> automotive/filesystem * don't include apple_availability.h * add using std::error_code * _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM --> namespace android::hardware::automotive::filesystem { * use namespace std::chrono * use std::error_code, std::is_floating_point, std::micro, std::nano, std::ratio * LIBCPP_END_NAMESPACE_FILESYSTEM --> } // namespace android::hardware::automotive::filesystem * disable clang format (to reduce diff size) filesystem: ----------- * _LIBCPP_FILESYSTEM --> _LIBAUTO_FILESYSTEM * std::filesystem --> android::hardware:automotive::filesystem * _VSTD_FS --> android::hardware::automotive::filesystem * _LIBCPP_END_NAMESPACE_FILESYSTEM --> } // namespace android::hardware::automotive::filesystem * Copied _FilesystemClock from chrono * use namespace std and std::chrono * use std::basic_string, std::enable_if, std::error_code, and std::false_type operations.cpp: --------------- * filesystem --> automotive/filesystem * "" --> <> for non-local includes * _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM --> namespace android::hardware::automotive::filesystem { * _VSTD_FS --> android::hardware::automotive::filesystem * _LIBCPP_END_NAMESPACE_FILESYSTEM --> } // namespace android::hardware::automotive::filesystem * disable clang-format (to reduce diff size) * fix "the the" typo (to pass lint) Bug: 152067309 Test: Manual Change-Id: I5551b3e634b85b4d7236e888de68740bfda6aad1 --- automotive/can/1.0/default/CanController.cpp | 25 +- .../can/1.0/default/libc++fs/.clang-format | 13 + .../can/1.0/default/libc++fs/Android.bp | 24 +- automotive/can/1.0/default/libc++fs/include | 1 - .../libc++fs/include/automotive/filesystem | 2699 +++++++++++++++++ automotive/can/1.0/default/libc++fs/src | 1 - .../src/filesystem/directory_iterator.cpp | 397 +++ .../src/filesystem/filesystem_common.h | 441 +++ .../libc++fs/src/filesystem/operations.cpp | 1773 +++++++++++ 9 files changed, 5337 insertions(+), 37 deletions(-) create mode 100644 automotive/can/1.0/default/libc++fs/.clang-format delete mode 120000 automotive/can/1.0/default/libc++fs/include create mode 100644 automotive/can/1.0/default/libc++fs/include/automotive/filesystem delete mode 120000 automotive/can/1.0/default/libc++fs/src create mode 100644 automotive/can/1.0/default/libc++fs/src/filesystem/directory_iterator.cpp create mode 100644 automotive/can/1.0/default/libc++fs/src/filesystem/filesystem_common.h create mode 100644 automotive/can/1.0/default/libc++fs/src/filesystem/operations.cpp diff --git a/automotive/can/1.0/default/CanController.cpp b/automotive/can/1.0/default/CanController.cpp index a2643afccf..9c0f2c57a2 100644 --- a/automotive/can/1.0/default/CanController.cpp +++ b/automotive/can/1.0/default/CanController.cpp @@ -23,7 +23,7 @@ #include #include -#include +#include #include #include @@ -31,6 +31,7 @@ namespace android::hardware::automotive::can::V1_0::implementation { using IfId = ICanController::BusConfig::InterfaceId; using IfIdDisc = ICanController::BusConfig::InterfaceId::hidl_discriminator; +namespace fs = android::hardware::automotive::filesystem; namespace fsErrors { static const std::error_code ok; @@ -42,10 +43,10 @@ static const std::error_code eacces(EACCES, std::generic_category()); /* In the /sys/devices tree, there are files called "serial", which contain the serial numbers * for various devices. The exact location inside of this directory is dependent upon the * hardware we are running on, so we have to start from /sys/devices and work our way down. */ -static const std::filesystem::path kDevPath("/sys/devices/"); +static const fs::path kDevPath("/sys/devices/"); static const std::regex kTtyRe("^tty[A-Z]+[0-9]+$"); -static constexpr auto kOpts = ~(std::filesystem::directory_options::follow_directory_symlink | - std::filesystem::directory_options::skip_permission_denied); +static constexpr auto kOpts = ~(fs::directory_options::follow_directory_symlink | + fs::directory_options::skip_permission_denied); /** * A helper object to associate the interface name and type of a USB to CAN adapter. @@ -72,16 +73,16 @@ static bool isValidName(const std::string& name) { * \param serialPath - Absolute path to a "serial" file for a given device in /sys. * \return A populated UsbCanIface. On failure, nullopt is returned. */ -static std::optional getIfaceName(std::filesystem::path serialPath) { +static std::optional getIfaceName(fs::path serialPath) { std::error_code fsStatus; // Since the path is to a file called "serial", we need to search its parent directory. - std::filesystem::recursive_directory_iterator fsItr(serialPath.parent_path(), kOpts, fsStatus); + fs::recursive_directory_iterator fsItr(serialPath.parent_path(), kOpts, fsStatus); if (fsStatus != fsErrors::ok) { LOG(ERROR) << "Failed to open " << serialPath.parent_path(); return std::nullopt; } - for (; fsStatus == fsErrors::ok && fsItr != std::filesystem::recursive_directory_iterator(); + for (; fsStatus == fsErrors::ok && fsItr != fs::recursive_directory_iterator(); fsItr.increment(fsStatus)) { /* We want either a directory called "net" or a directory that looks like tty, so * skip files. */ @@ -95,7 +96,7 @@ static std::optional getIfaceName(std::filesystem::path serialPath) if (currentDir == "net") { /* This device is a SocketCAN device. The iface name is the only directory under * net/. Multiple directories under net/ is an error.*/ - std::filesystem::directory_iterator netItr(fsItr->path(), kOpts, fsStatus); + fs::directory_iterator netItr(fsItr->path(), kOpts, fsStatus); if (fsStatus != fsErrors::ok) { LOG(ERROR) << "Failed to open " << fsItr->path() << " to get net name!"; return std::nullopt; @@ -111,7 +112,7 @@ static std::optional getIfaceName(std::filesystem::path serialPath) LOG(ERROR) << "Failed to verify " << fsItr->path() << " has valid net name!"; return std::nullopt; } - if (netItr != std::filesystem::directory_iterator()) { + if (netItr != fs::directory_iterator()) { // There should never be more than one name under net/ LOG(ERROR) << "Found more than one net name in " << fsItr->path() << "!"; return std::nullopt; @@ -157,13 +158,13 @@ static std::optional readSerialNo(const std::string& serialnoPath) */ static std::optional findUsbDevice(const hidl_vec& configSerialnos) { std::error_code fsStatus; - std::filesystem::recursive_directory_iterator fsItr(kDevPath, kOpts, fsStatus); + fs::recursive_directory_iterator fsItr(kDevPath, kOpts, fsStatus); if (fsStatus != fsErrors::ok) { LOG(ERROR) << "Failed to open " << kDevPath; return std::nullopt; } - for (; fsStatus == fsErrors::ok && fsItr != std::filesystem::recursive_directory_iterator(); + for (; fsStatus == fsErrors::ok && fsItr != fs::recursive_directory_iterator(); fsItr.increment(fsStatus)) { // We want to find a file called "serial", which is in a directory somewhere. Skip files. bool isDir = fsItr->is_directory(fsStatus); @@ -174,7 +175,7 @@ static std::optional findUsbDevice(const hidl_vec& con if (!isDir) continue; auto serialnoPath = fsItr->path() / "serial"; - bool isReg = std::filesystem::is_regular_file(serialnoPath, fsStatus); + bool isReg = fs::is_regular_file(serialnoPath, fsStatus); /* Make sure we have permissions to this directory, ignore enoent, since the file * "serial" may not exist, which is ok. */ diff --git a/automotive/can/1.0/default/libc++fs/.clang-format b/automotive/can/1.0/default/libc++fs/.clang-format new file mode 100644 index 0000000000..dd596813fb --- /dev/null +++ b/automotive/can/1.0/default/libc++fs/.clang-format @@ -0,0 +1,13 @@ +BasedOnStyle: LLVM + +--- +Language: Cpp +Standard: Cpp03 + +AlwaysBreakTemplateDeclarations: true +PointerAlignment: Left + +# Disable formatting options which may break tests. +SortIncludes: false +ReflowComments: false +--- diff --git a/automotive/can/1.0/default/libc++fs/Android.bp b/automotive/can/1.0/default/libc++fs/Android.bp index 1fe324ed0f..7ab1c28b3b 100644 --- a/automotive/can/1.0/default/libc++fs/Android.bp +++ b/automotive/can/1.0/default/libc++fs/Android.bp @@ -19,7 +19,6 @@ cc_defaults { name: "android.hardware.automotive@libc++fsdefaults", - host_supported: true, local_include_dirs: ["include"], export_include_dirs: ["include"], cflags: [ @@ -28,33 +27,12 @@ cc_defaults { "-Wno-unused-parameter", ], cppflags: [ - "-std=c++14", + "-std=c++17", "-fexceptions", "-DLIBCXX_BUILDING_LIBCXXABI", "-D_LIBCPP_BUILDING_LIBRARY", ], rtti: true, - stl: "none", - target: { - linux_bionic: { - enabled: true, - }, - windows: { - enabled: true, - cflags: [ - "-D_LIBCPP_HAS_THREAD_API_WIN32", - "-D_LIBCXXABI_BUILDING_LIBRARY", - "-D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS", - "-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS", - "-UWIN32_LEAN_AND_MEAN", - ], - }, - windows_x86: { - cflags: [ - "-fsjlj-exceptions", - ], - }, - }, } cc_library_static { diff --git a/automotive/can/1.0/default/libc++fs/include b/automotive/can/1.0/default/libc++fs/include deleted file mode 120000 index 346e65945a..0000000000 --- a/automotive/can/1.0/default/libc++fs/include +++ /dev/null @@ -1 +0,0 @@ -../../../../../../../external/libcxx/include/ \ No newline at end of file diff --git a/automotive/can/1.0/default/libc++fs/include/automotive/filesystem b/automotive/can/1.0/default/libc++fs/include/automotive/filesystem new file mode 100644 index 0000000000..660ad09745 --- /dev/null +++ b/automotive/can/1.0/default/libc++fs/include/automotive/filesystem @@ -0,0 +1,2699 @@ +// -*- C++ -*- +//===--------------------------- filesystem -------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +#ifndef _LIBAUTO_FILESYSTEM +#define _LIBAUTO_FILESYSTEM +/* + filesystem synopsis + + namespace android::hardware::automotive { namespace filesystem { + + class path; + + void swap(path& lhs, path& rhs) noexcept; + size_t hash_value(const path& p) noexcept; + + bool operator==(const path& lhs, const path& rhs) noexcept; + bool operator!=(const path& lhs, const path& rhs) noexcept; + bool operator< (const path& lhs, const path& rhs) noexcept; + bool operator<=(const path& lhs, const path& rhs) noexcept; + bool operator> (const path& lhs, const path& rhs) noexcept; + bool operator>=(const path& lhs, const path& rhs) noexcept; + + path operator/ (const path& lhs, const path& rhs); + + // fs.path.io operators are friends of path. + template + friend basic_ostream& + operator<<(basic_ostream& os, const path& p); + + template + friend basic_istream& + operator>>(basic_istream& is, path& p); + + template + path u8path(const Source& source); + template + path u8path(InputIterator first, InputIterator last); + + class filesystem_error; + class directory_entry; + + class directory_iterator; + + // enable directory_iterator range-based for statements + directory_iterator begin(directory_iterator iter) noexcept; + directory_iterator end(const directory_iterator&) noexcept; + + class recursive_directory_iterator; + + // enable recursive_directory_iterator range-based for statements + recursive_directory_iterator begin(recursive_directory_iterator iter) noexcept; + recursive_directory_iterator end(const recursive_directory_iterator&) noexcept; + + class file_status; + + struct space_info + { + uintmax_t capacity; + uintmax_t free; + uintmax_t available; + }; + + enum class file_type; + enum class perms; + enum class perm_options; + enum class copy_options; + enum class directory_options; + + typedef chrono::time_point file_time_type; + + // operational functions + + path absolute(const path& p); + path absolute(const path& p, error_code &ec); + + path canonical(const path& p); + path canonical(const path& p, error_code& ec); + + void copy(const path& from, const path& to); + void copy(const path& from, const path& to, error_code& ec); + void copy(const path& from, const path& to, copy_options options); + void copy(const path& from, const path& to, copy_options options, + error_code& ec); + + bool copy_file(const path& from, const path& to); + bool copy_file(const path& from, const path& to, error_code& ec); + bool copy_file(const path& from, const path& to, copy_options option); + bool copy_file(const path& from, const path& to, copy_options option, + error_code& ec); + + void copy_symlink(const path& existing_symlink, const path& new_symlink); + void copy_symlink(const path& existing_symlink, const path& new_symlink, + error_code& ec) noexcept; + + bool create_directories(const path& p); + bool create_directories(const path& p, error_code& ec); + + bool create_directory(const path& p); + bool create_directory(const path& p, error_code& ec) noexcept; + + bool create_directory(const path& p, const path& attributes); + bool create_directory(const path& p, const path& attributes, + error_code& ec) noexcept; + + void create_directory_symlink(const path& to, const path& new_symlink); + void create_directory_symlink(const path& to, const path& new_symlink, + error_code& ec) noexcept; + + void create_hard_link(const path& to, const path& new_hard_link); + void create_hard_link(const path& to, const path& new_hard_link, + error_code& ec) noexcept; + + void create_symlink(const path& to, const path& new_symlink); + void create_symlink(const path& to, const path& new_symlink, + error_code& ec) noexcept; + + path current_path(); + path current_path(error_code& ec); + void current_path(const path& p); + void current_path(const path& p, error_code& ec) noexcept; + + bool exists(file_status s) noexcept; + bool exists(const path& p); + bool exists(const path& p, error_code& ec) noexcept; + + bool equivalent(const path& p1, const path& p2); + bool equivalent(const path& p1, const path& p2, error_code& ec) noexcept; + + uintmax_t file_size(const path& p); + uintmax_t file_size(const path& p, error_code& ec) noexcept; + + uintmax_t hard_link_count(const path& p); + uintmax_t hard_link_count(const path& p, error_code& ec) noexcept; + + bool is_block_file(file_status s) noexcept; + bool is_block_file(const path& p); + bool is_block_file(const path& p, error_code& ec) noexcept; + + bool is_character_file(file_status s) noexcept; + bool is_character_file(const path& p); + bool is_character_file(const path& p, error_code& ec) noexcept; + + bool is_directory(file_status s) noexcept; + bool is_directory(const path& p); + bool is_directory(const path& p, error_code& ec) noexcept; + + bool is_empty(const path& p); + bool is_empty(const path& p, error_code& ec) noexcept; + + bool is_fifo(file_status s) noexcept; + bool is_fifo(const path& p); + bool is_fifo(const path& p, error_code& ec) noexcept; + + bool is_other(file_status s) noexcept; + bool is_other(const path& p); + bool is_other(const path& p, error_code& ec) noexcept; + + bool is_regular_file(file_status s) noexcept; + bool is_regular_file(const path& p); + bool is_regular_file(const path& p, error_code& ec) noexcept; + + bool is_socket(file_status s) noexcept; + bool is_socket(const path& p); + bool is_socket(const path& p, error_code& ec) noexcept; + + bool is_symlink(file_status s) noexcept; + bool is_symlink(const path& p); + bool is_symlink(const path& p, error_code& ec) noexcept; + + file_time_type last_write_time(const path& p); + file_time_type last_write_time(const path& p, error_code& ec) noexcept; + void last_write_time(const path& p, file_time_type new_time); + void last_write_time(const path& p, file_time_type new_time, + error_code& ec) noexcept; + + void permissions(const path& p, perms prms, + perm_options opts=perm_options::replace); + void permissions(const path& p, perms prms, error_code& ec) noexcept; + void permissions(const path& p, perms prms, perm_options opts, + error_code& ec); + + path proximate(const path& p, error_code& ec); + path proximate(const path& p, const path& base = current_path()); + path proximate(const path& p, const path& base, error_code &ec); + + path read_symlink(const path& p); + path read_symlink(const path& p, error_code& ec); + + path relative(const path& p, error_code& ec); + path relative(const path& p, const path& base=current_path()); + path relative(const path& p, const path& base, error_code& ec); + + bool remove(const path& p); + bool remove(const path& p, error_code& ec) noexcept; + + uintmax_t remove_all(const path& p); + uintmax_t remove_all(const path& p, error_code& ec); + + void rename(const path& from, const path& to); + void rename(const path& from, const path& to, error_code& ec) noexcept; + + void resize_file(const path& p, uintmax_t size); + void resize_file(const path& p, uintmax_t size, error_code& ec) noexcept; + + space_info space(const path& p); + space_info space(const path& p, error_code& ec) noexcept; + + file_status status(const path& p); + file_status status(const path& p, error_code& ec) noexcept; + + bool status_known(file_status s) noexcept; + + file_status symlink_status(const path& p); + file_status symlink_status(const path& p, error_code& ec) noexcept; + + path temp_directory_path(); + path temp_directory_path(error_code& ec); + + path weakly_canonical(path const& p); + path weakly_canonical(path const& p, error_code& ec); + + +} } // namespace android::hardware::automotive::filesystem + +*/ + +#include <__config> +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include // for quoted +#include +#include + +#include <__debug> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_PUSH_MACROS +#include <__undef_macros> + +#ifndef _LIBCPP_CXX03_LANG + +namespace android::hardware::automotive::filesystem { +using namespace std; +using namespace std::chrono; + +using std::basic_string; +using std::enable_if; +using std::error_code; +using std::false_type; + +#ifndef _VSTD +#define _LIBAUTO_UNDEF_VSTD +#define _VSTD std +#endif + +#ifdef _VSTD_FS +#pragma push_macro("_VSTD_FS") +#else +#define _LIBAUTO_UNDEF_VSTD_FS +#endif +#define _VSTD_FS android::hardware::automotive::filesystem + +/* Begin copy of _FilesystemClock from include/chrono */ +struct _FilesystemClock { +#if !defined(_LIBCPP_HAS_NO_INT128) + typedef __int128_t rep; + typedef nano period; +#else + typedef long long rep; + typedef nano period; +#endif + + typedef chrono::duration duration; + typedef chrono::time_point<_FilesystemClock> time_point; + + static _LIBCPP_CONSTEXPR_AFTER_CXX11 const bool is_steady = false; + + _LIBCPP_FUNC_VIS static time_point now() noexcept; + + _LIBCPP_INLINE_VISIBILITY + static time_t to_time_t(const time_point& __t) noexcept { + typedef chrono::duration __secs; + return time_t( + chrono::duration_cast<__secs>(__t.time_since_epoch()).count()); + } + + _LIBCPP_INLINE_VISIBILITY + static time_point from_time_t(time_t __t) noexcept { + typedef chrono::duration __secs; + return time_point(__secs(__t)); + } +}; +/* End copy of _FilesystemClock from include/chrono */ + +typedef chrono::time_point<_FilesystemClock> file_time_type; + +struct _LIBCPP_TYPE_VIS space_info { + uintmax_t capacity; + uintmax_t free; + uintmax_t available; +}; + +enum class _LIBCPP_ENUM_VIS file_type : signed char { + none = 0, + not_found = -1, + regular = 1, + directory = 2, + symlink = 3, + block = 4, + character = 5, + fifo = 6, + socket = 7, + unknown = 8 +}; + +enum class _LIBCPP_ENUM_VIS perms : unsigned { + 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, +}; + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perms operator&(perms _LHS, perms _RHS) { + return static_cast(static_cast(_LHS) & + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perms operator|(perms _LHS, perms _RHS) { + return static_cast(static_cast(_LHS) | + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perms operator^(perms _LHS, perms _RHS) { + return static_cast(static_cast(_LHS) ^ + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perms operator~(perms _LHS) { + return static_cast(~static_cast(_LHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline perms& operator&=(perms& _LHS, perms _RHS) { return _LHS = _LHS & _RHS; } + +_LIBCPP_INLINE_VISIBILITY +inline perms& operator|=(perms& _LHS, perms _RHS) { return _LHS = _LHS | _RHS; } + +_LIBCPP_INLINE_VISIBILITY +inline perms& operator^=(perms& _LHS, perms _RHS) { return _LHS = _LHS ^ _RHS; } + +enum class _LIBCPP_ENUM_VIS perm_options : unsigned char { + replace = 1, + add = 2, + remove = 4, + nofollow = 8 +}; + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perm_options operator&(perm_options _LHS, perm_options _RHS) { + return static_cast(static_cast(_LHS) & + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perm_options operator|(perm_options _LHS, perm_options _RHS) { + return static_cast(static_cast(_LHS) | + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perm_options operator^(perm_options _LHS, perm_options _RHS) { + return static_cast(static_cast(_LHS) ^ + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr perm_options operator~(perm_options _LHS) { + return static_cast(~static_cast(_LHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline perm_options& operator&=(perm_options& _LHS, perm_options _RHS) { + return _LHS = _LHS & _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline perm_options& operator|=(perm_options& _LHS, perm_options _RHS) { + return _LHS = _LHS | _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline perm_options& operator^=(perm_options& _LHS, perm_options _RHS) { + return _LHS = _LHS ^ _RHS; +} + +enum class _LIBCPP_ENUM_VIS copy_options : unsigned short { + none = 0, + skip_existing = 1, + overwrite_existing = 2, + update_existing = 4, + recursive = 8, + copy_symlinks = 16, + skip_symlinks = 32, + directories_only = 64, + create_symlinks = 128, + create_hard_links = 256, + __in_recursive_copy = 512, +}; + +_LIBCPP_INLINE_VISIBILITY +inline constexpr copy_options operator&(copy_options _LHS, copy_options _RHS) { + return static_cast(static_cast(_LHS) & + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr copy_options operator|(copy_options _LHS, copy_options _RHS) { + return static_cast(static_cast(_LHS) | + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr copy_options operator^(copy_options _LHS, copy_options _RHS) { + return static_cast(static_cast(_LHS) ^ + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr copy_options operator~(copy_options _LHS) { + return static_cast(~static_cast(_LHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline copy_options& operator&=(copy_options& _LHS, copy_options _RHS) { + return _LHS = _LHS & _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline copy_options& operator|=(copy_options& _LHS, copy_options _RHS) { + return _LHS = _LHS | _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline copy_options& operator^=(copy_options& _LHS, copy_options _RHS) { + return _LHS = _LHS ^ _RHS; +} + +enum class _LIBCPP_ENUM_VIS directory_options : unsigned char { + none = 0, + follow_directory_symlink = 1, + skip_permission_denied = 2 +}; + +_LIBCPP_INLINE_VISIBILITY +inline constexpr directory_options operator&(directory_options _LHS, + directory_options _RHS) { + return static_cast(static_cast(_LHS) & + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr directory_options operator|(directory_options _LHS, + directory_options _RHS) { + return static_cast(static_cast(_LHS) | + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr directory_options operator^(directory_options _LHS, + directory_options _RHS) { + return static_cast(static_cast(_LHS) ^ + static_cast(_RHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline constexpr directory_options operator~(directory_options _LHS) { + return static_cast(~static_cast(_LHS)); +} + +_LIBCPP_INLINE_VISIBILITY +inline directory_options& operator&=(directory_options& _LHS, + directory_options _RHS) { + return _LHS = _LHS & _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline directory_options& operator|=(directory_options& _LHS, + directory_options _RHS) { + return _LHS = _LHS | _RHS; +} + +_LIBCPP_INLINE_VISIBILITY +inline directory_options& operator^=(directory_options& _LHS, + directory_options _RHS) { + return _LHS = _LHS ^ _RHS; +} + +class _LIBCPP_TYPE_VIS file_status { +public: + // constructors + _LIBCPP_INLINE_VISIBILITY + file_status() noexcept : file_status(file_type::none) {} + _LIBCPP_INLINE_VISIBILITY + explicit file_status(file_type __ft, perms __prms = perms::unknown) noexcept + : __ft_(__ft), + __prms_(__prms) {} + + file_status(const file_status&) noexcept = default; + file_status(file_status&&) noexcept = default; + + _LIBCPP_INLINE_VISIBILITY + ~file_status() {} + + file_status& operator=(const file_status&) noexcept = default; + file_status& operator=(file_status&&) noexcept = default; + + // observers + _LIBCPP_INLINE_VISIBILITY + file_type type() const noexcept { return __ft_; } + + _LIBCPP_INLINE_VISIBILITY + perms permissions() const noexcept { return __prms_; } + + // modifiers + _LIBCPP_INLINE_VISIBILITY + void type(file_type __ft) noexcept { __ft_ = __ft; } + + _LIBCPP_INLINE_VISIBILITY + void permissions(perms __p) noexcept { __prms_ = __p; } + +private: + file_type __ft_; + perms __prms_; +}; + +class _LIBCPP_TYPE_VIS directory_entry; + +template +struct __can_convert_char { + static const bool value = false; +}; +template +struct __can_convert_char : public __can_convert_char<_Tp> {}; +template <> +struct __can_convert_char { + static const bool value = true; + using __char_type = char; +}; +template <> +struct __can_convert_char { + static const bool value = true; + using __char_type = wchar_t; +}; +template <> +struct __can_convert_char { + static const bool value = true; + using __char_type = char16_t; +}; +template <> +struct __can_convert_char { + static const bool value = true; + using __char_type = char32_t; +}; + +template +typename enable_if<__can_convert_char<_ECharT>::value, bool>::type +__is_separator(_ECharT __e) { + return __e == _ECharT('/'); +} + +struct _NullSentinal {}; + +template +using _Void = void; + +template +struct __is_pathable_string : public false_type {}; + +template +struct __is_pathable_string< + basic_string<_ECharT, _Traits, _Alloc>, + _Void::__char_type> > + : public __can_convert_char<_ECharT> { + using _Str = basic_string<_ECharT, _Traits, _Alloc>; + using _Base = __can_convert_char<_ECharT>; + static _ECharT const* __range_begin(_Str const& __s) { return __s.data(); } + static _ECharT const* __range_end(_Str const& __s) { + return __s.data() + __s.length(); + } + static _ECharT __first_or_null(_Str const& __s) { + return __s.empty() ? _ECharT{} : __s[0]; + } +}; + +template +struct __is_pathable_string< + basic_string_view<_ECharT, _Traits>, + _Void::__char_type> > + : public __can_convert_char<_ECharT> { + using _Str = basic_string_view<_ECharT, _Traits>; + using _Base = __can_convert_char<_ECharT>; + static _ECharT const* __range_begin(_Str const& __s) { return __s.data(); } + static _ECharT const* __range_end(_Str const& __s) { + return __s.data() + __s.length(); + } + static _ECharT __first_or_null(_Str const& __s) { + return __s.empty() ? _ECharT{} : __s[0]; + } +}; + +template ::type, + class _UnqualPtrType = + typename remove_const::type>::type, + bool _IsCharPtr = is_pointer<_DS>::value&& + __can_convert_char<_UnqualPtrType>::value> +struct __is_pathable_char_array : false_type {}; + +template +struct __is_pathable_char_array<_Source, _ECharT*, _UPtr, true> + : __can_convert_char::type> { + using _Base = __can_convert_char::type>; + + static _ECharT const* __range_begin(const _ECharT* __b) { return __b; } + static _ECharT const* __range_end(const _ECharT* __b) { + using _Iter = const _ECharT*; + const _ECharT __sentinal = _ECharT{}; + _Iter __e = __b; + for (; *__e != __sentinal; ++__e) + ; + return __e; + } + + static _ECharT __first_or_null(const _ECharT* __b) { return *__b; } +}; + +template ::value, + class = void> +struct __is_pathable_iter : false_type {}; + +template +struct __is_pathable_iter< + _Iter, true, + _Void::value_type>::__char_type> > + : __can_convert_char::value_type> { + using _ECharT = typename iterator_traits<_Iter>::value_type; + using _Base = __can_convert_char<_ECharT>; + + static _Iter __range_begin(_Iter __b) { return __b; } + static _NullSentinal __range_end(_Iter) { return _NullSentinal{}; } + + static _ECharT __first_or_null(_Iter __b) { return *__b; } +}; + +template ::value, + bool _IsCharIterT = __is_pathable_char_array<_Tp>::value, + bool _IsIterT = !_IsCharIterT && __is_pathable_iter<_Tp>::value> +struct __is_pathable : false_type { + static_assert(!_IsStringT && !_IsCharIterT && !_IsIterT, "Must all be false"); +}; + +template +struct __is_pathable<_Tp, true, false, false> : __is_pathable_string<_Tp> {}; + +template +struct __is_pathable<_Tp, false, true, false> : __is_pathable_char_array<_Tp> { +}; + +template +struct __is_pathable<_Tp, false, false, true> : __is_pathable_iter<_Tp> {}; + +template +struct _PathCVT { + static_assert(__can_convert_char<_ECharT>::value, + "Char type not convertible"); + + typedef __narrow_to_utf8 _Narrower; + + static void __append_range(string& __dest, _ECharT const* __b, + _ECharT const* __e) { + _Narrower()(back_inserter(__dest), __b, __e); + } + + template + static void __append_range(string& __dest, _Iter __b, _Iter __e) { + static_assert(!is_same<_Iter, _ECharT*>::value, "Call const overload"); + if (__b == __e) + return; + basic_string<_ECharT> __tmp(__b, __e); + _Narrower()(back_inserter(__dest), __tmp.data(), + __tmp.data() + __tmp.length()); + } + + template + static void __append_range(string& __dest, _Iter __b, _NullSentinal) { + static_assert(!is_same<_Iter, _ECharT*>::value, "Call const overload"); + const _ECharT __sentinal = _ECharT{}; + if (*__b == __sentinal) + return; + basic_string<_ECharT> __tmp; + for (; *__b != __sentinal; ++__b) + __tmp.push_back(*__b); + _Narrower()(back_inserter(__dest), __tmp.data(), + __tmp.data() + __tmp.length()); + } + + template + static void __append_source(string& __dest, _Source const& __s) { + using _Traits = __is_pathable<_Source>; + __append_range(__dest, _Traits::__range_begin(__s), + _Traits::__range_end(__s)); + } +}; + +template <> +struct _PathCVT { + + template + static typename enable_if<__is_exactly_input_iterator<_Iter>::value>::type + __append_range(string& __dest, _Iter __b, _Iter __e) { + for (; __b != __e; ++__b) + __dest.push_back(*__b); + } + + template + static typename enable_if<__is_forward_iterator<_Iter>::value>::type + __append_range(string& __dest, _Iter __b, _Iter __e) { + __dest.__append_forward_unsafe(__b, __e); + } + + template + static void __append_range(string& __dest, _Iter __b, _NullSentinal) { + const char __sentinal = char{}; + for (; *__b != __sentinal; ++__b) + __dest.push_back(*__b); + } + + template + static void __append_source(string& __dest, _Source const& __s) { + using _Traits = __is_pathable<_Source>; + __append_range(__dest, _Traits::__range_begin(__s), + _Traits::__range_end(__s)); + } +}; + +class _LIBCPP_TYPE_VIS path { + template + using _EnableIfPathable = + typename enable_if<__is_pathable<_SourceOrIter>::value, _Tp>::type; + + template + using _SourceChar = typename __is_pathable<_Tp>::__char_type; + + template + using _SourceCVT = _PathCVT<_SourceChar<_Tp> >; + +public: + typedef char value_type; + typedef basic_string string_type; + typedef _VSTD::string_view __string_view; + static constexpr value_type preferred_separator = '/'; + + enum class _LIBCPP_ENUM_VIS format : unsigned char { + auto_format, + native_format, + generic_format + }; + + // constructors and destructor + _LIBCPP_INLINE_VISIBILITY path() noexcept {} + _LIBCPP_INLINE_VISIBILITY path(const path& __p) : __pn_(__p.__pn_) {} + _LIBCPP_INLINE_VISIBILITY path(path&& __p) noexcept + : __pn_(_VSTD::move(__p.__pn_)) {} + + _LIBCPP_INLINE_VISIBILITY + path(string_type&& __s, format = format::auto_format) noexcept + : __pn_(_VSTD::move(__s)) {} + + template > + path(const _Source& __src, format = format::auto_format) { + _SourceCVT<_Source>::__append_source(__pn_, __src); + } + + template + path(_InputIt __first, _InputIt __last, format = format::auto_format) { + typedef typename iterator_traits<_InputIt>::value_type _ItVal; + _PathCVT<_ItVal>::__append_range(__pn_, __first, __last); + } + + // TODO Implement locale conversions. + template > + path(const _Source& __src, const locale& __loc, format = format::auto_format); + template + path(_InputIt __first, _InputIt _last, const locale& __loc, + format = format::auto_format); + + _LIBCPP_INLINE_VISIBILITY + ~path() = default; + + // assignments + _LIBCPP_INLINE_VISIBILITY + path& operator=(const path& __p) { + __pn_ = __p.__pn_; + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& operator=(path&& __p) noexcept { + __pn_ = _VSTD::move(__p.__pn_); + return *this; + } + + template + _LIBCPP_INLINE_VISIBILITY path& operator=(string_type&& __s) noexcept { + __pn_ = _VSTD::move(__s); + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& assign(string_type&& __s) noexcept { + __pn_ = _VSTD::move(__s); + return *this; + } + + template + _LIBCPP_INLINE_VISIBILITY _EnableIfPathable<_Source> + operator=(const _Source& __src) { + return this->assign(__src); + } + + template + _EnableIfPathable<_Source> assign(const _Source& __src) { + __pn_.clear(); + _SourceCVT<_Source>::__append_source(__pn_, __src); + return *this; + } + + template + path& assign(_InputIt __first, _InputIt __last) { + typedef typename iterator_traits<_InputIt>::value_type _ItVal; + __pn_.clear(); + _PathCVT<_ItVal>::__append_range(__pn_, __first, __last); + return *this; + } + +private: + template + static bool __source_is_absolute(_ECharT __first_or_null) { + return __is_separator(__first_or_null); + } + +public: + // appends + path& operator/=(const path& __p) { + if (__p.is_absolute()) { + __pn_ = __p.__pn_; + return *this; + } + if (has_filename()) + __pn_ += preferred_separator; + __pn_ += __p.native(); + return *this; + } + + // FIXME: Use _LIBCPP_DIAGNOSE_WARNING to produce a diagnostic when __src + // is known at compile time to be "/' since the user almost certainly intended + // to append a separator instead of overwriting the path with "/" + template + _LIBCPP_INLINE_VISIBILITY _EnableIfPathable<_Source> + operator/=(const _Source& __src) { + return this->append(__src); + } + + template + _EnableIfPathable<_Source> append(const _Source& __src) { + using _Traits = __is_pathable<_Source>; + using _CVT = _PathCVT<_SourceChar<_Source> >; + if (__source_is_absolute(_Traits::__first_or_null(__src))) + __pn_.clear(); + else if (has_filename()) + __pn_ += preferred_separator; + _CVT::__append_source(__pn_, __src); + return *this; + } + + template + path& append(_InputIt __first, _InputIt __last) { + typedef typename iterator_traits<_InputIt>::value_type _ItVal; + static_assert(__can_convert_char<_ItVal>::value, "Must convertible"); + using _CVT = _PathCVT<_ItVal>; + if (__first != __last && __source_is_absolute(*__first)) + __pn_.clear(); + else if (has_filename()) + __pn_ += preferred_separator; + _CVT::__append_range(__pn_, __first, __last); + return *this; + } + + // concatenation + _LIBCPP_INLINE_VISIBILITY + path& operator+=(const path& __x) { + __pn_ += __x.__pn_; + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& operator+=(const string_type& __x) { + __pn_ += __x; + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& operator+=(__string_view __x) { + __pn_ += __x; + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& operator+=(const value_type* __x) { + __pn_ += __x; + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + path& operator+=(value_type __x) { + __pn_ += __x; + return *this; + } + + template + typename enable_if<__can_convert_char<_ECharT>::value, path&>::type + operator+=(_ECharT __x) { + basic_string<_ECharT> __tmp; + __tmp += __x; + _PathCVT<_ECharT>::__append_source(__pn_, __tmp); + return *this; + } + + template + _EnableIfPathable<_Source> operator+=(const _Source& __x) { + return this->concat(__x); + } + + template + _EnableIfPathable<_Source> concat(const _Source& __x) { + _SourceCVT<_Source>::__append_source(__pn_, __x); + return *this; + } + + template + path& concat(_InputIt __first, _InputIt __last) { + typedef typename iterator_traits<_InputIt>::value_type _ItVal; + _PathCVT<_ItVal>::__append_range(__pn_, __first, __last); + return *this; + } + + // modifiers + _LIBCPP_INLINE_VISIBILITY + void clear() noexcept { __pn_.clear(); } + + path& make_preferred() { return *this; } + + _LIBCPP_INLINE_VISIBILITY + path& remove_filename() { + auto __fname = __filename(); + if (!__fname.empty()) + __pn_.erase(__fname.data() - __pn_.data()); + return *this; + } + + path& replace_filename(const path& __replacement) { + remove_filename(); + return (*this /= __replacement); + } + + path& replace_extension(const path& __replacement = path()); + + _LIBCPP_INLINE_VISIBILITY + void swap(path& __rhs) noexcept { __pn_.swap(__rhs.__pn_); } + + // private helper to allow reserving memory in the path + _LIBCPP_INLINE_VISIBILITY + void __reserve(size_t __s) { __pn_.reserve(__s); } + + // native format observers + _LIBCPP_INLINE_VISIBILITY + const string_type& native() const noexcept { return __pn_; } + + _LIBCPP_INLINE_VISIBILITY + const value_type* c_str() const noexcept { return __pn_.c_str(); } + + _LIBCPP_INLINE_VISIBILITY operator string_type() const { return __pn_; } + + template , + class _Allocator = allocator<_ECharT> > + basic_string<_ECharT, _Traits, _Allocator> + string(const _Allocator& __a = _Allocator()) const { + using _CVT = __widen_from_utf8; + using _Str = basic_string<_ECharT, _Traits, _Allocator>; + _Str __s(__a); + __s.reserve(__pn_.size()); + _CVT()(back_inserter(__s), __pn_.data(), __pn_.data() + __pn_.size()); + return __s; + } + + _LIBCPP_INLINE_VISIBILITY std::string string() const { return __pn_; } + _LIBCPP_INLINE_VISIBILITY std::wstring wstring() const { + return string(); + } + _LIBCPP_INLINE_VISIBILITY std::string u8string() const { return __pn_; } + _LIBCPP_INLINE_VISIBILITY std::u16string u16string() const { + return string(); + } + _LIBCPP_INLINE_VISIBILITY std::u32string u32string() const { + return string(); + } + + // generic format observers + template , + class _Allocator = allocator<_ECharT> > + basic_string<_ECharT, _Traits, _Allocator> + generic_string(const _Allocator& __a = _Allocator()) const { + return string<_ECharT, _Traits, _Allocator>(__a); + } + + std::string generic_string() const { return __pn_; } + std::wstring generic_wstring() const { return string(); } + std::string generic_u8string() const { return __pn_; } + std::u16string generic_u16string() const { return string(); } + std::u32string generic_u32string() const { return string(); } + +private: + int __compare(__string_view) const; + __string_view __root_name() const; + __string_view __root_directory() const; + __string_view __root_path_raw() const; + __string_view __relative_path() const; + __string_view __parent_path() const; + __string_view __filename() const; + __string_view __stem() const; + __string_view __extension() const; + +public: + // compare + _LIBCPP_INLINE_VISIBILITY int compare(const path& __p) const noexcept { + return __compare(__p.__pn_); + } + _LIBCPP_INLINE_VISIBILITY int compare(const string_type& __s) const { + return __compare(__s); + } + _LIBCPP_INLINE_VISIBILITY int compare(__string_view __s) const { + return __compare(__s); + } + _LIBCPP_INLINE_VISIBILITY int compare(const value_type* __s) const { + return __compare(__s); + } + + // decomposition + _LIBCPP_INLINE_VISIBILITY path root_name() const { + return string_type(__root_name()); + } + _LIBCPP_INLINE_VISIBILITY path root_directory() const { + return string_type(__root_directory()); + } + _LIBCPP_INLINE_VISIBILITY path root_path() const { + return root_name().append(string_type(__root_directory())); + } + _LIBCPP_INLINE_VISIBILITY path relative_path() const { + return string_type(__relative_path()); + } + _LIBCPP_INLINE_VISIBILITY path parent_path() const { + return string_type(__parent_path()); + } + _LIBCPP_INLINE_VISIBILITY path filename() const { + return string_type(__filename()); + } + _LIBCPP_INLINE_VISIBILITY path stem() const { return string_type(__stem()); } + _LIBCPP_INLINE_VISIBILITY path extension() const { + return string_type(__extension()); + } + + // query + _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY bool + empty() const noexcept { + return __pn_.empty(); + } + + _LIBCPP_INLINE_VISIBILITY bool has_root_name() const { + return !__root_name().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_root_directory() const { + return !__root_directory().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_root_path() const { + return !__root_path_raw().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_relative_path() const { + return !__relative_path().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_parent_path() const { + return !__parent_path().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_filename() const { + return !__filename().empty(); + } + _LIBCPP_INLINE_VISIBILITY bool has_stem() const { return !__stem().empty(); } + _LIBCPP_INLINE_VISIBILITY bool has_extension() const { + return !__extension().empty(); + } + + _LIBCPP_INLINE_VISIBILITY bool is_absolute() const { + return has_root_directory(); + } + _LIBCPP_INLINE_VISIBILITY bool is_relative() const { return !is_absolute(); } + + // relative paths + path lexically_normal() const; + path lexically_relative(const path& __base) const; + + _LIBCPP_INLINE_VISIBILITY path lexically_proximate(const path& __base) const { + path __result = this->lexically_relative(__base); + if (__result.native().empty()) + return *this; + return __result; + } + + // iterators + class _LIBCPP_TYPE_VIS iterator; + typedef iterator const_iterator; + + iterator begin() const; + iterator end() const; + + template + _LIBCPP_INLINE_VISIBILITY friend + typename enable_if::value && + is_same<_Traits, char_traits >::value, + basic_ostream<_CharT, _Traits>&>::type + operator<<(basic_ostream<_CharT, _Traits>& __os, const path& __p) { + __os << std::__quoted(__p.native()); + return __os; + } + + template + _LIBCPP_INLINE_VISIBILITY friend + typename enable_if::value || + !is_same<_Traits, char_traits >::value, + basic_ostream<_CharT, _Traits>&>::type + operator<<(basic_ostream<_CharT, _Traits>& __os, const path& __p) { + __os << std::__quoted(__p.string<_CharT, _Traits>()); + return __os; + } + + template + _LIBCPP_INLINE_VISIBILITY friend basic_istream<_CharT, _Traits>& + operator>>(basic_istream<_CharT, _Traits>& __is, path& __p) { + basic_string<_CharT, _Traits> __tmp; + __is >> __quoted(__tmp); + __p = __tmp; + return __is; + } + + friend _LIBCPP_INLINE_VISIBILITY bool operator==(const path& __lhs, const path& __rhs) noexcept { + return __lhs.compare(__rhs) == 0; + } + friend _LIBCPP_INLINE_VISIBILITY bool operator!=(const path& __lhs, const path& __rhs) noexcept { + return __lhs.compare(__rhs) != 0; + } + friend _LIBCPP_INLINE_VISIBILITY bool operator<(const path& __lhs, const path& __rhs) noexcept { + return __lhs.compare(__rhs) < 0; + } + friend _LIBCPP_INLINE_VISIBILITY bool operator<=(const path& __lhs, const path& __rhs) noexcept { + return __lhs.compare(__rhs) <= 0; + } + friend _LIBCPP_INLINE_VISIBILITY bool operator>(const path& __lhs, const path& __rhs) noexcept { + return __lhs.compare(__rhs) > 0; + } + friend _LIBCPP_INLINE_VISIBILITY bool operator>=(const path& __lhs, const path& __rhs) noexcept { + return __lhs.compare(__rhs) >= 0; + } + + friend _LIBCPP_INLINE_VISIBILITY path operator/(const path& __lhs, + const path& __rhs) { + path __result(__lhs); + __result /= __rhs; + return __result; + } +private: + inline _LIBCPP_INLINE_VISIBILITY path& + __assign_view(__string_view const& __s) noexcept { + __pn_ = string_type(__s); + return *this; + } + string_type __pn_; +}; + +inline _LIBCPP_INLINE_VISIBILITY void swap(path& __lhs, path& __rhs) noexcept { + __lhs.swap(__rhs); +} + +_LIBCPP_FUNC_VIS +size_t hash_value(const path& __p) noexcept; + +template +_LIBCPP_INLINE_VISIBILITY + typename enable_if<__is_pathable<_Source>::value, path>::type + u8path(const _Source& __s) { + static_assert( + is_same::__char_type, char>::value, + "u8path(Source const&) requires Source have a character type of type " + "'char'"); + return path(__s); +} + +template +_LIBCPP_INLINE_VISIBILITY + typename enable_if<__is_pathable<_InputIt>::value, path>::type + u8path(_InputIt __f, _InputIt __l) { + static_assert( + is_same::__char_type, char>::value, + "u8path(Iter, Iter) requires Iter have a value_type of type 'char'"); + return path(__f, __l); +} + +class _LIBCPP_TYPE_VIS path::iterator { +public: + enum _ParserState : unsigned char { + _Singular, + _BeforeBegin, + _InRootName, + _InRootDir, + _InFilenames, + _InTrailingSep, + _AtEnd + }; + +public: + typedef bidirectional_iterator_tag iterator_category; + + typedef path value_type; + typedef std::ptrdiff_t difference_type; + typedef const path* pointer; + typedef const path& reference; + + typedef void + __stashing_iterator_tag; // See reverse_iterator and __is_stashing_iterator + +public: + _LIBCPP_INLINE_VISIBILITY + iterator() + : __stashed_elem_(), __path_ptr_(nullptr), __entry_(), + __state_(_Singular) {} + + iterator(const iterator&) = default; + ~iterator() = default; + + iterator& operator=(const iterator&) = default; + + _LIBCPP_INLINE_VISIBILITY + reference operator*() const { return __stashed_elem_; } + + _LIBCPP_INLINE_VISIBILITY + pointer operator->() const { return &__stashed_elem_; } + + _LIBCPP_INLINE_VISIBILITY + iterator& operator++() { + _LIBCPP_ASSERT(__state_ != _Singular, + "attempting to increment a singular iterator"); + _LIBCPP_ASSERT(__state_ != _AtEnd, + "attempting to increment the end iterator"); + return __increment(); + } + + _LIBCPP_INLINE_VISIBILITY + iterator operator++(int) { + iterator __it(*this); + this->operator++(); + return __it; + } + + _LIBCPP_INLINE_VISIBILITY + iterator& operator--() { + _LIBCPP_ASSERT(__state_ != _Singular, + "attempting to decrement a singular iterator"); + _LIBCPP_ASSERT(__entry_.data() != __path_ptr_->native().data(), + "attempting to decrement the begin iterator"); + return __decrement(); + } + + _LIBCPP_INLINE_VISIBILITY + iterator operator--(int) { + iterator __it(*this); + this->operator--(); + return __it; + } + +private: + friend class path; + + inline _LIBCPP_INLINE_VISIBILITY friend bool operator==(const iterator&, + const iterator&); + + iterator& __increment(); + iterator& __decrement(); + + path __stashed_elem_; + const path* __path_ptr_; + path::__string_view __entry_; + _ParserState __state_; +}; + +inline _LIBCPP_INLINE_VISIBILITY bool operator==(const path::iterator& __lhs, + const path::iterator& __rhs) { + return __lhs.__path_ptr_ == __rhs.__path_ptr_ && + __lhs.__entry_.data() == __rhs.__entry_.data(); +} + +inline _LIBCPP_INLINE_VISIBILITY bool operator!=(const path::iterator& __lhs, + const path::iterator& __rhs) { + return !(__lhs == __rhs); +} + +class _LIBCPP_EXCEPTION_ABI filesystem_error : public system_error { +public: + _LIBCPP_INLINE_VISIBILITY + filesystem_error(const string& __what, error_code __ec) + : system_error(__ec, __what), + __storage_(make_shared<_Storage>(path(), path())) { + __create_what(0); + } + + _LIBCPP_INLINE_VISIBILITY + filesystem_error(const string& __what, const path& __p1, error_code __ec) + : system_error(__ec, __what), + __storage_(make_shared<_Storage>(__p1, path())) { + __create_what(1); + } + + _LIBCPP_INLINE_VISIBILITY + filesystem_error(const string& __what, const path& __p1, const path& __p2, + error_code __ec) + : system_error(__ec, __what), + __storage_(make_shared<_Storage>(__p1, __p2)) { + __create_what(2); + } + + _LIBCPP_INLINE_VISIBILITY + const path& path1() const noexcept { return __storage_->__p1_; } + + _LIBCPP_INLINE_VISIBILITY + const path& path2() const noexcept { return __storage_->__p2_; } + + ~filesystem_error() override; // key function + + _LIBCPP_INLINE_VISIBILITY + const char* what() const noexcept override { + return __storage_->__what_.c_str(); + } + + _LIBCPP_FUNC_VIS + void __create_what(int __num_paths); + +private: + struct _Storage { + _LIBCPP_INLINE_VISIBILITY + _Storage(const path& __p1, const path& __p2) : __p1_(__p1), __p2_(__p2) {} + + path __p1_; + path __p2_; + string __what_; + }; + shared_ptr<_Storage> __storage_; +}; + +template +_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY +#ifndef _LIBCPP_NO_EXCEPTIONS + void + __throw_filesystem_error(_Args&&... __args) { + throw filesystem_error(std::forward<_Args>(__args)...); +} +#else + void + __throw_filesystem_error(_Args&&...) { + _VSTD::abort(); +} +#endif + +// operational functions + +_LIBCPP_FUNC_VIS +path __absolute(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +path __canonical(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +void __copy(const path& __from, const path& __to, copy_options __opt, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +bool __copy_file(const path& __from, const path& __to, copy_options __opt, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +void __copy_symlink(const path& __existing_symlink, const path& __new_symlink, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +bool __create_directories(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +bool __create_directory(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +bool __create_directory(const path& p, const path& attributes, + error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +void __create_directory_symlink(const path& __to, const path& __new_symlink, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +void __create_hard_link(const path& __to, const path& __new_hard_link, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +void __create_symlink(const path& __to, const path& __new_symlink, + error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +path __current_path(error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +void __current_path(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +bool __equivalent(const path&, const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +uintmax_t __file_size(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +uintmax_t __hard_link_count(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +bool __fs_is_empty(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +file_time_type __last_write_time(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +void __last_write_time(const path& p, file_time_type new_time, + error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +void __permissions(const path&, perms, perm_options, error_code* = nullptr); +_LIBCPP_FUNC_VIS +path __read_symlink(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +bool __remove(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +uintmax_t __remove_all(const path& p, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +void __rename(const path& from, const path& to, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +void __resize_file(const path& p, uintmax_t size, error_code* ec = nullptr); +_LIBCPP_FUNC_VIS +space_info __space(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +file_status __status(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +file_status __symlink_status(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +path __system_complete(const path&, error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +path __temp_directory_path(error_code* __ec = nullptr); +_LIBCPP_FUNC_VIS +path __weakly_canonical(path const& __p, error_code* __ec = nullptr); + +inline _LIBCPP_INLINE_VISIBILITY path current_path() { + return __current_path(); +} + +inline _LIBCPP_INLINE_VISIBILITY path current_path(error_code& __ec) { + return __current_path(&__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void current_path(const path& __p) { + __current_path(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY void current_path(const path& __p, + error_code& __ec) noexcept { + __current_path(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path absolute(const path& __p) { + return __absolute(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY path absolute(const path& __p, + error_code& __ec) { + return __absolute(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path canonical(const path& __p) { + return __canonical(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY path canonical(const path& __p, + error_code& __ec) { + return __canonical(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, + const path& __to) { + __copy(__from, __to, copy_options::none); +} + +inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to, + error_code& __ec) { + __copy(__from, __to, copy_options::none, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to, + copy_options __opt) { + __copy(__from, __to, __opt); +} + +inline _LIBCPP_INLINE_VISIBILITY void copy(const path& __from, const path& __to, + copy_options __opt, + error_code& __ec) { + __copy(__from, __to, __opt, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool copy_file(const path& __from, + const path& __to) { + return __copy_file(__from, __to, copy_options::none); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +copy_file(const path& __from, const path& __to, error_code& __ec) { + return __copy_file(__from, __to, copy_options::none, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +copy_file(const path& __from, const path& __to, copy_options __opt) { + return __copy_file(__from, __to, __opt); +} + +inline _LIBCPP_INLINE_VISIBILITY bool copy_file(const path& __from, + const path& __to, + copy_options __opt, + error_code& __ec) { + return __copy_file(__from, __to, __opt, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void copy_symlink(const path& __existing, + const path& __new) { + __copy_symlink(__existing, __new); +} + +inline _LIBCPP_INLINE_VISIBILITY void +copy_symlink(const path& __ext, const path& __new, error_code& __ec) noexcept { + __copy_symlink(__ext, __new, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool create_directories(const path& __p) { + return __create_directories(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY bool create_directories(const path& __p, + error_code& __ec) { + return __create_directories(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool create_directory(const path& __p) { + return __create_directory(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +create_directory(const path& __p, error_code& __ec) noexcept { + return __create_directory(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool create_directory(const path& __p, + const path& __attrs) { + return __create_directory(__p, __attrs); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +create_directory(const path& __p, const path& __attrs, + error_code& __ec) noexcept { + return __create_directory(__p, __attrs, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void +create_directory_symlink(const path& __to, const path& __new) { + __create_directory_symlink(__to, __new); +} + +inline _LIBCPP_INLINE_VISIBILITY void +create_directory_symlink(const path& __to, const path& __new, + error_code& __ec) noexcept { + __create_directory_symlink(__to, __new, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void create_hard_link(const path& __to, + const path& __new) { + __create_hard_link(__to, __new); +} + +inline _LIBCPP_INLINE_VISIBILITY void +create_hard_link(const path& __to, const path& __new, + error_code& __ec) noexcept { + __create_hard_link(__to, __new, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void create_symlink(const path& __to, + const path& __new) { + __create_symlink(__to, __new); +} + +inline _LIBCPP_INLINE_VISIBILITY void +create_symlink(const path& __to, const path& __new, error_code& __ec) noexcept { + return __create_symlink(__to, __new, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool status_known(file_status __s) noexcept { + return __s.type() != file_type::none; +} + +inline _LIBCPP_INLINE_VISIBILITY bool exists(file_status __s) noexcept { + return status_known(__s) && __s.type() != file_type::not_found; +} + +inline _LIBCPP_INLINE_VISIBILITY bool exists(const path& __p) { + return exists(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool exists(const path& __p, + error_code& __ec) noexcept { + auto __s = __status(__p, &__ec); + if (status_known(__s)) + __ec.clear(); + return exists(__s); +} + +inline _LIBCPP_INLINE_VISIBILITY bool equivalent(const path& __p1, + const path& __p2) { + return __equivalent(__p1, __p2); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +equivalent(const path& __p1, const path& __p2, error_code& __ec) noexcept { + return __equivalent(__p1, __p2, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t file_size(const path& __p) { + return __file_size(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t +file_size(const path& __p, error_code& __ec) noexcept { + return __file_size(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t hard_link_count(const path& __p) { + return __hard_link_count(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t +hard_link_count(const path& __p, error_code& __ec) noexcept { + return __hard_link_count(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(file_status __s) noexcept { + return __s.type() == file_type::block; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(const path& __p) { + return is_block_file(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_block_file(const path& __p, + error_code& __ec) noexcept { + return is_block_file(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +is_character_file(file_status __s) noexcept { + return __s.type() == file_type::character; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_character_file(const path& __p) { + return is_character_file(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +is_character_file(const path& __p, error_code& __ec) noexcept { + return is_character_file(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_directory(file_status __s) noexcept { + return __s.type() == file_type::directory; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_directory(const path& __p) { + return is_directory(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_directory(const path& __p, + error_code& __ec) noexcept { + return is_directory(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_empty(const path& __p) { + return __fs_is_empty(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_empty(const path& __p, + error_code& __ec) { + return __fs_is_empty(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(file_status __s) noexcept { + return __s.type() == file_type::fifo; +} +inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(const path& __p) { + return is_fifo(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_fifo(const path& __p, + error_code& __ec) noexcept { + return is_fifo(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +is_regular_file(file_status __s) noexcept { + return __s.type() == file_type::regular; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_regular_file(const path& __p) { + return is_regular_file(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool +is_regular_file(const path& __p, error_code& __ec) noexcept { + return is_regular_file(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_socket(file_status __s) noexcept { + return __s.type() == file_type::socket; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_socket(const path& __p) { + return is_socket(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_socket(const path& __p, + error_code& __ec) noexcept { + return is_socket(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(file_status __s) noexcept { + return __s.type() == file_type::symlink; +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(const path& __p) { + return is_symlink(__symlink_status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_symlink(const path& __p, + error_code& __ec) noexcept { + return is_symlink(__symlink_status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_other(file_status __s) noexcept { + return exists(__s) && !is_regular_file(__s) && !is_directory(__s) && + !is_symlink(__s); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_other(const path& __p) { + return is_other(__status(__p)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool is_other(const path& __p, + error_code& __ec) noexcept { + return is_other(__status(__p, &__ec)); +} + +inline _LIBCPP_INLINE_VISIBILITY file_time_type +last_write_time(const path& __p) { + return __last_write_time(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY file_time_type +last_write_time(const path& __p, error_code& __ec) noexcept { + return __last_write_time(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void last_write_time(const path& __p, + file_time_type __t) { + __last_write_time(__p, __t); +} + +inline _LIBCPP_INLINE_VISIBILITY void +last_write_time(const path& __p, file_time_type __t, + error_code& __ec) noexcept { + __last_write_time(__p, __t, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void +permissions(const path& __p, perms __prms, + perm_options __opts = perm_options::replace) { + __permissions(__p, __prms, __opts); +} + +inline _LIBCPP_INLINE_VISIBILITY void permissions(const path& __p, perms __prms, + error_code& __ec) noexcept { + __permissions(__p, __prms, perm_options::replace, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void permissions(const path& __p, perms __prms, + perm_options __opts, + error_code& __ec) { + __permissions(__p, __prms, __opts, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path proximate(const path& __p, + const path& __base, + error_code& __ec) { + path __tmp = __weakly_canonical(__p, &__ec); + if (__ec) + return {}; + path __tmp_base = __weakly_canonical(__base, &__ec); + if (__ec) + return {}; + return __tmp.lexically_proximate(__tmp_base); +} + +inline _LIBCPP_INLINE_VISIBILITY path proximate(const path& __p, + error_code& __ec) { + return proximate(__p, current_path(), __ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path +proximate(const path& __p, const path& __base = current_path()) { + return __weakly_canonical(__p).lexically_proximate( + __weakly_canonical(__base)); +} + +inline _LIBCPP_INLINE_VISIBILITY path read_symlink(const path& __p) { + return __read_symlink(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY path read_symlink(const path& __p, + error_code& __ec) { + return __read_symlink(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path relative(const path& __p, + const path& __base, + error_code& __ec) { + path __tmp = __weakly_canonical(__p, &__ec); + if (__ec) + return path(); + path __tmpbase = __weakly_canonical(__base, &__ec); + if (__ec) + return path(); + return __tmp.lexically_relative(__tmpbase); +} + +inline _LIBCPP_INLINE_VISIBILITY path relative(const path& __p, + error_code& __ec) { + return relative(__p, current_path(), __ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path +relative(const path& __p, const path& __base = current_path()) { + return __weakly_canonical(__p).lexically_relative(__weakly_canonical(__base)); +} + +inline _LIBCPP_INLINE_VISIBILITY bool remove(const path& __p) { + return __remove(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY bool remove(const path& __p, + error_code& __ec) noexcept { + return __remove(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t remove_all(const path& __p) { + return __remove_all(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY uintmax_t remove_all(const path& __p, + error_code& __ec) { + return __remove_all(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void rename(const path& __from, + const path& __to) { + return __rename(__from, __to); +} + +inline _LIBCPP_INLINE_VISIBILITY void +rename(const path& __from, const path& __to, error_code& __ec) noexcept { + return __rename(__from, __to, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY void resize_file(const path& __p, + uintmax_t __ns) { + return __resize_file(__p, __ns); +} + +inline _LIBCPP_INLINE_VISIBILITY void +resize_file(const path& __p, uintmax_t __ns, error_code& __ec) noexcept { + return __resize_file(__p, __ns, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY space_info space(const path& __p) { + return __space(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY space_info space(const path& __p, + error_code& __ec) noexcept { + return __space(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY file_status status(const path& __p) { + return __status(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY file_status status(const path& __p, + error_code& __ec) noexcept { + return __status(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY file_status symlink_status(const path& __p) { + return __symlink_status(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY file_status +symlink_status(const path& __p, error_code& __ec) noexcept { + return __symlink_status(__p, &__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path temp_directory_path() { + return __temp_directory_path(); +} + +inline _LIBCPP_INLINE_VISIBILITY path temp_directory_path(error_code& __ec) { + return __temp_directory_path(&__ec); +} + +inline _LIBCPP_INLINE_VISIBILITY path weakly_canonical(path const& __p) { + return __weakly_canonical(__p); +} + +inline _LIBCPP_INLINE_VISIBILITY path weakly_canonical(path const& __p, + error_code& __ec) { + return __weakly_canonical(__p, &__ec); +} + +class directory_iterator; +class recursive_directory_iterator; +class __dir_stream; + +class directory_entry { + typedef _VSTD_FS::path _Path; + +public: + // constructors and destructors + directory_entry() noexcept = default; + directory_entry(directory_entry const&) = default; + directory_entry(directory_entry&&) noexcept = default; + + _LIBCPP_INLINE_VISIBILITY + explicit directory_entry(_Path const& __p) : __p_(__p) { + error_code __ec; + __refresh(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + directory_entry(_Path const& __p, error_code& __ec) : __p_(__p) { + __refresh(&__ec); + } + + ~directory_entry() {} + + directory_entry& operator=(directory_entry const&) = default; + directory_entry& operator=(directory_entry&&) noexcept = default; + + _LIBCPP_INLINE_VISIBILITY + void assign(_Path const& __p) { + __p_ = __p; + error_code __ec; + __refresh(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + void assign(_Path const& __p, error_code& __ec) { + __p_ = __p; + __refresh(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + void replace_filename(_Path const& __p) { + __p_.replace_filename(__p); + error_code __ec; + __refresh(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + void replace_filename(_Path const& __p, error_code& __ec) { + __p_ = __p_.parent_path() / __p; + __refresh(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + void refresh() { __refresh(); } + + _LIBCPP_INLINE_VISIBILITY + void refresh(error_code& __ec) noexcept { __refresh(&__ec); } + + _LIBCPP_INLINE_VISIBILITY + _Path const& path() const noexcept { return __p_; } + + _LIBCPP_INLINE_VISIBILITY + operator const _Path&() const noexcept { return __p_; } + + _LIBCPP_INLINE_VISIBILITY + bool exists() const { return _VSTD_FS::exists(file_status{__get_ft()}); } + + _LIBCPP_INLINE_VISIBILITY + bool exists(error_code& __ec) const noexcept { + return _VSTD_FS::exists(file_status{__get_ft(&__ec)}); + } + + _LIBCPP_INLINE_VISIBILITY + bool is_block_file() const { return __get_ft() == file_type::block; } + + _LIBCPP_INLINE_VISIBILITY + bool is_block_file(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::block; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_character_file() const { return __get_ft() == file_type::character; } + + _LIBCPP_INLINE_VISIBILITY + bool is_character_file(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::character; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_directory() const { return __get_ft() == file_type::directory; } + + _LIBCPP_INLINE_VISIBILITY + bool is_directory(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::directory; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_fifo() const { return __get_ft() == file_type::fifo; } + + _LIBCPP_INLINE_VISIBILITY + bool is_fifo(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::fifo; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_other() const { return _VSTD_FS::is_other(file_status{__get_ft()}); } + + _LIBCPP_INLINE_VISIBILITY + bool is_other(error_code& __ec) const noexcept { + return _VSTD_FS::is_other(file_status{__get_ft(&__ec)}); + } + + _LIBCPP_INLINE_VISIBILITY + bool is_regular_file() const { return __get_ft() == file_type::regular; } + + _LIBCPP_INLINE_VISIBILITY + bool is_regular_file(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::regular; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_socket() const { return __get_ft() == file_type::socket; } + + _LIBCPP_INLINE_VISIBILITY + bool is_socket(error_code& __ec) const noexcept { + return __get_ft(&__ec) == file_type::socket; + } + + _LIBCPP_INLINE_VISIBILITY + bool is_symlink() const { return __get_sym_ft() == file_type::symlink; } + + _LIBCPP_INLINE_VISIBILITY + bool is_symlink(error_code& __ec) const noexcept { + return __get_sym_ft(&__ec) == file_type::symlink; + } + _LIBCPP_INLINE_VISIBILITY + uintmax_t file_size() const { return __get_size(); } + + _LIBCPP_INLINE_VISIBILITY + uintmax_t file_size(error_code& __ec) const noexcept { + return __get_size(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + uintmax_t hard_link_count() const { return __get_nlink(); } + + _LIBCPP_INLINE_VISIBILITY + uintmax_t hard_link_count(error_code& __ec) const noexcept { + return __get_nlink(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + file_time_type last_write_time() const { return __get_write_time(); } + + _LIBCPP_INLINE_VISIBILITY + file_time_type last_write_time(error_code& __ec) const noexcept { + return __get_write_time(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + file_status status() const { return __get_status(); } + + _LIBCPP_INLINE_VISIBILITY + file_status status(error_code& __ec) const noexcept { + return __get_status(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + file_status symlink_status() const { return __get_symlink_status(); } + + _LIBCPP_INLINE_VISIBILITY + file_status symlink_status(error_code& __ec) const noexcept { + return __get_symlink_status(&__ec); + } + + _LIBCPP_INLINE_VISIBILITY + bool operator<(directory_entry const& __rhs) const noexcept { + return __p_ < __rhs.__p_; + } + + _LIBCPP_INLINE_VISIBILITY + bool operator==(directory_entry const& __rhs) const noexcept { + return __p_ == __rhs.__p_; + } + + _LIBCPP_INLINE_VISIBILITY + bool operator!=(directory_entry const& __rhs) const noexcept { + return __p_ != __rhs.__p_; + } + + _LIBCPP_INLINE_VISIBILITY + bool operator<=(directory_entry const& __rhs) const noexcept { + return __p_ <= __rhs.__p_; + } + + _LIBCPP_INLINE_VISIBILITY + bool operator>(directory_entry const& __rhs) const noexcept { + return __p_ > __rhs.__p_; + } + + _LIBCPP_INLINE_VISIBILITY + bool operator>=(directory_entry const& __rhs) const noexcept { + return __p_ >= __rhs.__p_; + } + +private: + friend class directory_iterator; + friend class recursive_directory_iterator; + friend class __dir_stream; + + enum _CacheType : unsigned char { + _Empty, + _IterSymlink, + _IterNonSymlink, + _RefreshSymlink, + _RefreshSymlinkUnresolved, + _RefreshNonSymlink + }; + + struct __cached_data { + uintmax_t __size_; + uintmax_t __nlink_; + file_time_type __write_time_; + perms __sym_perms_; + perms __non_sym_perms_; + file_type __type_; + _CacheType __cache_type_; + + _LIBCPP_INLINE_VISIBILITY + __cached_data() noexcept { __reset(); } + + _LIBCPP_INLINE_VISIBILITY + void __reset() { + __cache_type_ = _Empty; + __type_ = file_type::none; + __sym_perms_ = __non_sym_perms_ = perms::unknown; + __size_ = __nlink_ = uintmax_t(-1); + __write_time_ = file_time_type::min(); + } + }; + + _LIBCPP_INLINE_VISIBILITY + static __cached_data __create_iter_result(file_type __ft) { + __cached_data __data; + __data.__type_ = __ft; + __data.__cache_type_ = [&]() { + switch (__ft) { + case file_type::none: + return _Empty; + case file_type::symlink: + return _IterSymlink; + default: + return _IterNonSymlink; + } + }(); + return __data; + } + + _LIBCPP_INLINE_VISIBILITY + void __assign_iter_entry(_Path&& __p, __cached_data __dt) { + __p_ = std::move(__p); + __data_ = __dt; + } + + _LIBCPP_FUNC_VIS + error_code __do_refresh() noexcept; + + _LIBCPP_INLINE_VISIBILITY + static bool __is_dne_error(error_code const& __ec) { + if (!__ec) + return true; + switch (static_cast(__ec.value())) { + case errc::no_such_file_or_directory: + case errc::not_a_directory: + return true; + default: + return false; + } + } + + _LIBCPP_INLINE_VISIBILITY + void __handle_error(const char* __msg, error_code* __dest_ec, + error_code const& __ec, bool __allow_dne = false) const { + if (__dest_ec) { + *__dest_ec = __ec; + return; + } + if (__ec && (!__allow_dne || !__is_dne_error(__ec))) + __throw_filesystem_error(__msg, __p_, __ec); + } + + _LIBCPP_INLINE_VISIBILITY + void __refresh(error_code* __ec = nullptr) { + __handle_error("in directory_entry::refresh", __ec, __do_refresh(), + /*allow_dne*/ true); + } + + _LIBCPP_INLINE_VISIBILITY + file_type __get_sym_ft(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + return __symlink_status(__p_, __ec).type(); + case _IterSymlink: + case _RefreshSymlink: + case _RefreshSymlinkUnresolved: + if (__ec) + __ec->clear(); + return file_type::symlink; + case _IterNonSymlink: + case _RefreshNonSymlink: + file_status __st(__data_.__type_); + if (__ec && !_VSTD_FS::exists(__st)) + *__ec = make_error_code(errc::no_such_file_or_directory); + else if (__ec) + __ec->clear(); + return __data_.__type_; + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + file_type __get_ft(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterSymlink: + case _RefreshSymlinkUnresolved: + return __status(__p_, __ec).type(); + case _IterNonSymlink: + case _RefreshNonSymlink: + case _RefreshSymlink: { + file_status __st(__data_.__type_); + if (__ec && !_VSTD_FS::exists(__st)) + *__ec = make_error_code(errc::no_such_file_or_directory); + else if (__ec) + __ec->clear(); + return __data_.__type_; + } + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + file_status __get_status(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterNonSymlink: + case _IterSymlink: + case _RefreshSymlinkUnresolved: + return __status(__p_, __ec); + case _RefreshNonSymlink: + case _RefreshSymlink: + return file_status(__get_ft(__ec), __data_.__non_sym_perms_); + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + file_status __get_symlink_status(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterNonSymlink: + case _IterSymlink: + return __symlink_status(__p_, __ec); + case _RefreshNonSymlink: + return file_status(__get_sym_ft(__ec), __data_.__non_sym_perms_); + case _RefreshSymlink: + case _RefreshSymlinkUnresolved: + return file_status(__get_sym_ft(__ec), __data_.__sym_perms_); + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + uintmax_t __get_size(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterNonSymlink: + case _IterSymlink: + case _RefreshSymlinkUnresolved: + return _VSTD_FS::__file_size(__p_, __ec); + case _RefreshSymlink: + case _RefreshNonSymlink: { + error_code __m_ec; + file_status __st(__get_ft(&__m_ec)); + __handle_error("in directory_entry::file_size", __ec, __m_ec); + if (_VSTD_FS::exists(__st) && !_VSTD_FS::is_regular_file(__st)) { + errc __err_kind = _VSTD_FS::is_directory(__st) ? errc::is_a_directory + : errc::not_supported; + __handle_error("in directory_entry::file_size", __ec, + make_error_code(__err_kind)); + } + return __data_.__size_; + } + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + uintmax_t __get_nlink(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterNonSymlink: + case _IterSymlink: + case _RefreshSymlinkUnresolved: + return _VSTD_FS::__hard_link_count(__p_, __ec); + case _RefreshSymlink: + case _RefreshNonSymlink: { + error_code __m_ec; + (void)__get_ft(&__m_ec); + __handle_error("in directory_entry::hard_link_count", __ec, __m_ec); + return __data_.__nlink_; + } + } + _LIBCPP_UNREACHABLE(); + } + + _LIBCPP_INLINE_VISIBILITY + file_time_type __get_write_time(error_code* __ec = nullptr) const { + switch (__data_.__cache_type_) { + case _Empty: + case _IterNonSymlink: + case _IterSymlink: + case _RefreshSymlinkUnresolved: + return _VSTD_FS::__last_write_time(__p_, __ec); + case _RefreshSymlink: + case _RefreshNonSymlink: { + error_code __m_ec; + file_status __st(__get_ft(&__m_ec)); + __handle_error("in directory_entry::last_write_time", __ec, __m_ec); + if (_VSTD_FS::exists(__st) && + __data_.__write_time_ == file_time_type::min()) + __handle_error("in directory_entry::last_write_time", __ec, + make_error_code(errc::value_too_large)); + return __data_.__write_time_; + } + } + _LIBCPP_UNREACHABLE(); + } + +private: + _Path __p_; + __cached_data __data_; +}; + +class __dir_element_proxy { +public: + inline _LIBCPP_INLINE_VISIBILITY directory_entry operator*() { + return _VSTD::move(__elem_); + } + +private: + friend class directory_iterator; + friend class recursive_directory_iterator; + explicit __dir_element_proxy(directory_entry const& __e) : __elem_(__e) {} + __dir_element_proxy(__dir_element_proxy&& __o) + : __elem_(_VSTD::move(__o.__elem_)) {} + directory_entry __elem_; +}; + +class directory_iterator { +public: + typedef directory_entry value_type; + typedef ptrdiff_t difference_type; + typedef value_type const* pointer; + typedef value_type const& reference; + typedef input_iterator_tag iterator_category; + +public: + //ctor & dtor + directory_iterator() noexcept {} + + explicit directory_iterator(const path& __p) + : directory_iterator(__p, nullptr) {} + + directory_iterator(const path& __p, directory_options __opts) + : directory_iterator(__p, nullptr, __opts) {} + + directory_iterator(const path& __p, error_code& __ec) + : directory_iterator(__p, &__ec) {} + + directory_iterator(const path& __p, directory_options __opts, + error_code& __ec) + : directory_iterator(__p, &__ec, __opts) {} + + directory_iterator(const directory_iterator&) = default; + directory_iterator(directory_iterator&&) = default; + directory_iterator& operator=(const directory_iterator&) = default; + + directory_iterator& operator=(directory_iterator&& __o) noexcept { + // non-default implementation provided to support self-move assign. + if (this != &__o) { + __imp_ = _VSTD::move(__o.__imp_); + } + return *this; + } + + ~directory_iterator() = default; + + const directory_entry& operator*() const { + _LIBCPP_ASSERT(__imp_, "The end iterator cannot be dereferenced"); + return __dereference(); + } + + const directory_entry* operator->() const { return &**this; } + + directory_iterator& operator++() { return __increment(); } + + __dir_element_proxy operator++(int) { + __dir_element_proxy __p(**this); + __increment(); + return __p; + } + + directory_iterator& increment(error_code& __ec) { return __increment(&__ec); } + +private: + inline _LIBCPP_INLINE_VISIBILITY friend bool + operator==(const directory_iterator& __lhs, + const directory_iterator& __rhs) noexcept; + + // construct the dir_stream + _LIBCPP_FUNC_VIS + directory_iterator(const path&, error_code*, + directory_options = directory_options::none); + + _LIBCPP_FUNC_VIS + directory_iterator& __increment(error_code* __ec = nullptr); + + _LIBCPP_FUNC_VIS + const directory_entry& __dereference() const; + +private: + shared_ptr<__dir_stream> __imp_; +}; + +inline _LIBCPP_INLINE_VISIBILITY bool +operator==(const directory_iterator& __lhs, + const directory_iterator& __rhs) noexcept { + return __lhs.__imp_ == __rhs.__imp_; +} + +inline _LIBCPP_INLINE_VISIBILITY bool +operator!=(const directory_iterator& __lhs, + const directory_iterator& __rhs) noexcept { + return !(__lhs == __rhs); +} + +// enable directory_iterator range-based for statements +inline _LIBCPP_INLINE_VISIBILITY directory_iterator +begin(directory_iterator __iter) noexcept { + return __iter; +} + +inline _LIBCPP_INLINE_VISIBILITY directory_iterator +end(const directory_iterator&) noexcept { + return directory_iterator(); +} + +class recursive_directory_iterator { +public: + using value_type = directory_entry; + using difference_type = std::ptrdiff_t; + using pointer = directory_entry const*; + using reference = directory_entry const&; + using iterator_category = std::input_iterator_tag; + +public: + // constructors and destructor + _LIBCPP_INLINE_VISIBILITY + recursive_directory_iterator() noexcept : __rec_(false) {} + + _LIBCPP_INLINE_VISIBILITY + explicit recursive_directory_iterator( + const path& __p, directory_options __xoptions = directory_options::none) + : recursive_directory_iterator(__p, __xoptions, nullptr) {} + + _LIBCPP_INLINE_VISIBILITY + recursive_directory_iterator(const path& __p, directory_options __xoptions, + error_code& __ec) + : recursive_directory_iterator(__p, __xoptions, &__ec) {} + + _LIBCPP_INLINE_VISIBILITY + recursive_directory_iterator(const path& __p, error_code& __ec) + : recursive_directory_iterator(__p, directory_options::none, &__ec) {} + + recursive_directory_iterator(const recursive_directory_iterator&) = default; + recursive_directory_iterator(recursive_directory_iterator&&) = default; + + recursive_directory_iterator& + operator=(const recursive_directory_iterator&) = default; + + _LIBCPP_INLINE_VISIBILITY + recursive_directory_iterator& + operator=(recursive_directory_iterator&& __o) noexcept { + // non-default implementation provided to support self-move assign. + if (this != &__o) { + __imp_ = _VSTD::move(__o.__imp_); + __rec_ = __o.__rec_; + } + return *this; + } + + ~recursive_directory_iterator() = default; + + _LIBCPP_INLINE_VISIBILITY + const directory_entry& operator*() const { return __dereference(); } + + _LIBCPP_INLINE_VISIBILITY + const directory_entry* operator->() const { return &__dereference(); } + + recursive_directory_iterator& operator++() { return __increment(); } + + _LIBCPP_INLINE_VISIBILITY + __dir_element_proxy operator++(int) { + __dir_element_proxy __p(**this); + __increment(); + return __p; + } + + _LIBCPP_INLINE_VISIBILITY + recursive_directory_iterator& increment(error_code& __ec) { + return __increment(&__ec); + } + + _LIBCPP_FUNC_VIS directory_options options() const; + _LIBCPP_FUNC_VIS int depth() const; + + _LIBCPP_INLINE_VISIBILITY + void pop() { __pop(); } + + _LIBCPP_INLINE_VISIBILITY + void pop(error_code& __ec) { __pop(&__ec); } + + _LIBCPP_INLINE_VISIBILITY + bool recursion_pending() const { return __rec_; } + + _LIBCPP_INLINE_VISIBILITY + void disable_recursion_pending() { __rec_ = false; } + +private: + recursive_directory_iterator(const path& __p, directory_options __opt, + error_code* __ec); + + _LIBCPP_FUNC_VIS + const directory_entry& __dereference() const; + + _LIBCPP_FUNC_VIS + bool __try_recursion(error_code* __ec); + + _LIBCPP_FUNC_VIS + void __advance(error_code* __ec = nullptr); + + _LIBCPP_FUNC_VIS + recursive_directory_iterator& __increment(error_code* __ec = nullptr); + + _LIBCPP_FUNC_VIS + void __pop(error_code* __ec = nullptr); + + inline _LIBCPP_INLINE_VISIBILITY friend bool + operator==(const recursive_directory_iterator&, + const recursive_directory_iterator&) noexcept; + + struct __shared_imp; + shared_ptr<__shared_imp> __imp_; + bool __rec_; +}; // class recursive_directory_iterator + +inline _LIBCPP_INLINE_VISIBILITY bool +operator==(const recursive_directory_iterator& __lhs, + const recursive_directory_iterator& __rhs) noexcept { + return __lhs.__imp_ == __rhs.__imp_; +} + +_LIBCPP_INLINE_VISIBILITY +inline bool operator!=(const recursive_directory_iterator& __lhs, + const recursive_directory_iterator& __rhs) noexcept { + return !(__lhs == __rhs); +} +// enable recursive_directory_iterator range-based for statements +inline _LIBCPP_INLINE_VISIBILITY recursive_directory_iterator +begin(recursive_directory_iterator __iter) noexcept { + return __iter; +} + +inline _LIBCPP_INLINE_VISIBILITY recursive_directory_iterator +end(const recursive_directory_iterator&) noexcept { + return recursive_directory_iterator(); +} + +} // namespace android::hardware::automotive::filesystem +#ifdef _LIBAUTO_UNDEF_VSTD +#undef _VSTD +#undef _LIBAUTO_UNDEF_VSTD +#endif + +#ifndef _LIBAUTO_UNDEF_VSTD_FS +#pragma pop_macro("_VSTD_FS") +#else +#undef _VSTD +#undef _LIBAUTO_UNDEF_VSTD_FS +#endif + +#endif // !_LIBCPP_CXX03_LANG + +_LIBCPP_POP_MACROS + +#endif // _LIBAUTO_FILESYSTEM diff --git a/automotive/can/1.0/default/libc++fs/src b/automotive/can/1.0/default/libc++fs/src deleted file mode 120000 index 7abb4ba5f9..0000000000 --- a/automotive/can/1.0/default/libc++fs/src +++ /dev/null @@ -1 +0,0 @@ -../../../../../../../external/libcxx/src/ \ No newline at end of file diff --git a/automotive/can/1.0/default/libc++fs/src/filesystem/directory_iterator.cpp b/automotive/can/1.0/default/libc++fs/src/filesystem/directory_iterator.cpp new file mode 100644 index 0000000000..624538bd77 --- /dev/null +++ b/automotive/can/1.0/default/libc++fs/src/filesystem/directory_iterator.cpp @@ -0,0 +1,397 @@ +//===------------------ directory_iterator.cpp ----------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +/* clang-format off */ +#include "automotive/filesystem" +#include <__config> +#if defined(_LIBCPP_WIN32API) +#define WIN32_LEAN_AND_MEAN +#include +#else +#include +#endif +#include + +#include "filesystem_common.h" + +namespace android::hardware::automotive::filesystem { + +namespace detail { +namespace { + +#if !defined(_LIBCPP_WIN32API) +template +static file_type get_file_type(DirEntT* ent, int) { + switch (ent->d_type) { + case DT_BLK: + return file_type::block; + case DT_CHR: + return file_type::character; + case DT_DIR: + return file_type::directory; + case DT_FIFO: + return file_type::fifo; + case DT_LNK: + return file_type::symlink; + case DT_REG: + return file_type::regular; + case DT_SOCK: + return file_type::socket; + // Unlike in lstat, hitting "unknown" here simply means that the underlying + // filesystem doesn't support d_type. Report is as 'none' so we correctly + // set the cache to empty. + case DT_UNKNOWN: + break; + } + return file_type::none; +} + +template +static file_type get_file_type(DirEntT* ent, long) { + return file_type::none; +} + +static pair posix_readdir(DIR* dir_stream, + error_code& ec) { + struct dirent* dir_entry_ptr = nullptr; + errno = 0; // zero errno in order to detect errors + ec.clear(); + if ((dir_entry_ptr = ::readdir(dir_stream)) == nullptr) { + if (errno) + ec = capture_errno(); + return {}; + } else { + return {dir_entry_ptr->d_name, get_file_type(dir_entry_ptr, 0)}; + } +} +#else + +static file_type get_file_type(const WIN32_FIND_DATA& data) { + //auto attrs = data.dwFileAttributes; + // FIXME(EricWF) + return file_type::unknown; +} +static uintmax_t get_file_size(const WIN32_FIND_DATA& data) { + return (data.nFileSizeHight * (MAXDWORD + 1)) + data.nFileSizeLow; +} +static file_time_type get_write_time(const WIN32_FIND_DATA& data) { + ULARGE_INTEGER tmp; + FILETIME& time = data.ftLastWriteTime; + tmp.u.LowPart = time.dwLowDateTime; + tmp.u.HighPart = time.dwHighDateTime; + return file_time_type(file_time_type::duration(time.QuadPart)); +} + +#endif + +} // namespace +} // namespace detail + +using detail::ErrorHandler; + +#if defined(_LIBCPP_WIN32API) +class __dir_stream { +public: + __dir_stream() = delete; + __dir_stream& operator=(const __dir_stream&) = delete; + + __dir_stream(__dir_stream&& __ds) noexcept : __stream_(__ds.__stream_), + __root_(move(__ds.__root_)), + __entry_(move(__ds.__entry_)) { + __ds.__stream_ = INVALID_HANDLE_VALUE; + } + + __dir_stream(const path& root, directory_options opts, error_code& ec) + : __stream_(INVALID_HANDLE_VALUE), __root_(root) { + __stream_ = ::FindFirstFileEx(root.c_str(), &__data_); + if (__stream_ == INVALID_HANDLE_VALUE) { + ec = error_code(::GetLastError(), generic_category()); + const bool ignore_permission_denied = + bool(opts & directory_options::skip_permission_denied); + if (ignore_permission_denied && ec.value() == ERROR_ACCESS_DENIED) + ec.clear(); + return; + } + } + + ~__dir_stream() noexcept { + if (__stream_ == INVALID_HANDLE_VALUE) + return; + close(); + } + + bool good() const noexcept { return __stream_ != INVALID_HANDLE_VALUE; } + + bool advance(error_code& ec) { + while (::FindNextFile(__stream_, &__data_)) { + if (!strcmp(__data_.cFileName, ".") || strcmp(__data_.cFileName, "..")) + continue; + // FIXME: Cache more of this + //directory_entry::__cached_data cdata; + //cdata.__type_ = get_file_type(__data_); + //cdata.__size_ = get_file_size(__data_); + //cdata.__write_time_ = get_write_time(__data_); + __entry_.__assign_iter_entry( + __root_ / __data_.cFileName, + directory_entry::__create_iter_result(get_file_type(__data))); + return true; + } + ec = error_code(::GetLastError(), generic_category()); + close(); + return false; + } + +private: + error_code close() noexcept { + error_code ec; + if (!::FindClose(__stream_)) + ec = error_code(::GetLastError(), generic_category()); + __stream_ = INVALID_HANDLE_VALUE; + return ec; + } + + HANDLE __stream_{INVALID_HANDLE_VALUE}; + WIN32_FIND_DATA __data_; + +public: + path __root_; + directory_entry __entry_; +}; +#else +class __dir_stream { +public: + __dir_stream() = delete; + __dir_stream& operator=(const __dir_stream&) = delete; + + __dir_stream(__dir_stream&& other) noexcept : __stream_(other.__stream_), + __root_(move(other.__root_)), + __entry_(move(other.__entry_)) { + other.__stream_ = nullptr; + } + + __dir_stream(const path& root, directory_options opts, error_code& ec) + : __stream_(nullptr), __root_(root) { + if ((__stream_ = ::opendir(root.c_str())) == nullptr) { + ec = detail::capture_errno(); + const bool allow_eacess = + bool(opts & directory_options::skip_permission_denied); + if (allow_eacess && ec.value() == EACCES) + ec.clear(); + return; + } + advance(ec); + } + + ~__dir_stream() noexcept { + if (__stream_) + close(); + } + + bool good() const noexcept { return __stream_ != nullptr; } + + bool advance(error_code& ec) { + while (true) { + auto str_type_pair = detail::posix_readdir(__stream_, ec); + auto& str = str_type_pair.first; + if (str == "." || str == "..") { + continue; + } else if (ec || str.empty()) { + close(); + return false; + } else { + __entry_.__assign_iter_entry( + __root_ / str, + directory_entry::__create_iter_result(str_type_pair.second)); + return true; + } + } + } + +private: + error_code close() noexcept { + error_code m_ec; + if (::closedir(__stream_) == -1) + m_ec = detail::capture_errno(); + __stream_ = nullptr; + return m_ec; + } + + DIR* __stream_{nullptr}; + +public: + path __root_; + directory_entry __entry_; +}; +#endif + +// directory_iterator + +directory_iterator::directory_iterator(const path& p, error_code* ec, + directory_options opts) { + ErrorHandler err("directory_iterator::directory_iterator(...)", ec, &p); + + error_code m_ec; + __imp_ = make_shared<__dir_stream>(p, opts, m_ec); + if (ec) + *ec = m_ec; + if (!__imp_->good()) { + __imp_.reset(); + if (m_ec) + err.report(m_ec); + } +} + +directory_iterator& directory_iterator::__increment(error_code* ec) { + _LIBCPP_ASSERT(__imp_, "Attempting to increment an invalid iterator"); + ErrorHandler err("directory_iterator::operator++()", ec); + + error_code m_ec; + if (!__imp_->advance(m_ec)) { + path root = move(__imp_->__root_); + __imp_.reset(); + if (m_ec) + err.report(m_ec, "at root \"%s\"", root); + } + return *this; +} + +directory_entry const& directory_iterator::__dereference() const { + _LIBCPP_ASSERT(__imp_, "Attempting to dereference an invalid iterator"); + return __imp_->__entry_; +} + +// recursive_directory_iterator + +struct recursive_directory_iterator::__shared_imp { + stack<__dir_stream> __stack_; + directory_options __options_; +}; + +recursive_directory_iterator::recursive_directory_iterator( + const path& p, directory_options opt, error_code* ec) + : __imp_(nullptr), __rec_(true) { + ErrorHandler err("recursive_directory_iterator", ec, &p); + + error_code m_ec; + __dir_stream new_s(p, opt, m_ec); + if (m_ec) + err.report(m_ec); + if (m_ec || !new_s.good()) + return; + + __imp_ = make_shared<__shared_imp>(); + __imp_->__options_ = opt; + __imp_->__stack_.push(move(new_s)); +} + +void recursive_directory_iterator::__pop(error_code* ec) { + _LIBCPP_ASSERT(__imp_, "Popping the end iterator"); + if (ec) + ec->clear(); + __imp_->__stack_.pop(); + if (__imp_->__stack_.size() == 0) + __imp_.reset(); + else + __advance(ec); +} + +directory_options recursive_directory_iterator::options() const { + return __imp_->__options_; +} + +int recursive_directory_iterator::depth() const { + return __imp_->__stack_.size() - 1; +} + +const directory_entry& recursive_directory_iterator::__dereference() const { + return __imp_->__stack_.top().__entry_; +} + +recursive_directory_iterator& +recursive_directory_iterator::__increment(error_code* ec) { + if (ec) + ec->clear(); + if (recursion_pending()) { + if (__try_recursion(ec) || (ec && *ec)) + return *this; + } + __rec_ = true; + __advance(ec); + return *this; +} + +void recursive_directory_iterator::__advance(error_code* ec) { + ErrorHandler err("recursive_directory_iterator::operator++()", ec); + + const directory_iterator end_it; + auto& stack = __imp_->__stack_; + error_code m_ec; + while (stack.size() > 0) { + if (stack.top().advance(m_ec)) + return; + if (m_ec) + break; + stack.pop(); + } + + if (m_ec) { + path root = move(stack.top().__root_); + __imp_.reset(); + err.report(m_ec, "at root \"%s\"", root); + } else { + __imp_.reset(); + } +} + +bool recursive_directory_iterator::__try_recursion(error_code* ec) { + ErrorHandler err("recursive_directory_iterator::operator++()", ec); + + bool rec_sym = bool(options() & directory_options::follow_directory_symlink); + + auto& curr_it = __imp_->__stack_.top(); + + bool skip_rec = false; + error_code m_ec; + if (!rec_sym) { + file_status st(curr_it.__entry_.__get_sym_ft(&m_ec)); + if (m_ec && status_known(st)) + m_ec.clear(); + if (m_ec || is_symlink(st) || !is_directory(st)) + skip_rec = true; + } else { + file_status st(curr_it.__entry_.__get_ft(&m_ec)); + if (m_ec && status_known(st)) + m_ec.clear(); + if (m_ec || !is_directory(st)) + skip_rec = true; + } + + if (!skip_rec) { + __dir_stream new_it(curr_it.__entry_.path(), __imp_->__options_, m_ec); + if (new_it.good()) { + __imp_->__stack_.push(move(new_it)); + return true; + } + } + if (m_ec) { + const bool allow_eacess = + bool(__imp_->__options_ & directory_options::skip_permission_denied); + if (m_ec.value() == EACCES && allow_eacess) { + if (ec) + ec->clear(); + } else { + path at_ent = move(curr_it.__entry_.__p_); + __imp_.reset(); + err.report(m_ec, "attempting recursion into \"%s\"", at_ent); + } + } + return false; +} + +} // namespace android::hardware::automotive::filesystem +/* clang-format on */ diff --git a/automotive/can/1.0/default/libc++fs/src/filesystem/filesystem_common.h b/automotive/can/1.0/default/libc++fs/src/filesystem/filesystem_common.h new file mode 100644 index 0000000000..4f4466120a --- /dev/null +++ b/automotive/can/1.0/default/libc++fs/src/filesystem/filesystem_common.h @@ -0,0 +1,441 @@ +//===----------------------------------------------------------------------===//// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===//// +/* clang-format off */ +#ifndef AUTO_FILESYSTEM_COMMON_H +#define AUTO_FILESYSTEM_COMMON_H + +#include "automotive/filesystem" +#include +#include +#include +#include + +#include +#include +#include +#include // for ::utimes as used in __last_write_time +#include /* values for fchmodat */ + +#if !defined(__APPLE__) +// We can use the presence of UTIME_OMIT to detect platforms that provide +// utimensat. +#if defined(UTIME_OMIT) +#define _LIBCPP_USE_UTIMENSAT +#endif +#endif + +#if defined(__GNUC__) +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wunused-function" +#endif + +namespace android::hardware::automotive::filesystem { +using namespace std::chrono; + +using std::error_code; +using std::is_floating_point; +using std::micro; +using std::nano; +using std::ratio; + +namespace detail { +namespace { + +static string format_string_imp(const char* msg, ...) { + // we might need a second shot at this, so pre-emptivly make a copy + struct GuardVAList { + va_list& target; + bool active = true; + GuardVAList(va_list& target) : target(target), active(true) {} + void clear() { + if (active) + va_end(target); + active = false; + } + ~GuardVAList() { + if (active) + va_end(target); + } + }; + va_list args; + va_start(args, msg); + GuardVAList args_guard(args); + + va_list args_cp; + va_copy(args_cp, args); + GuardVAList args_copy_guard(args_cp); + + std::string result; + + array local_buff; + size_t size_with_null = local_buff.size(); + auto ret = ::vsnprintf(local_buff.data(), size_with_null, msg, args_cp); + + args_copy_guard.clear(); + + // handle empty expansion + if (ret == 0) + return result; + if (static_cast(ret) < size_with_null) { + result.assign(local_buff.data(), static_cast(ret)); + return result; + } + + // we did not provide a long enough buffer on our first attempt. The + // return value is the number of bytes (excluding the null byte) that are + // needed for formatting. + size_with_null = static_cast(ret) + 1; + result.__resize_default_init(size_with_null - 1); + ret = ::vsnprintf(&result[0], size_with_null, msg, args); + _LIBCPP_ASSERT(static_cast(ret) == (size_with_null - 1), "TODO"); + + return result; +} + +const char* unwrap(string const& s) { return s.c_str(); } +const char* unwrap(path const& p) { return p.native().c_str(); } +template +Arg const& unwrap(Arg const& a) { + static_assert(!is_class::value, "cannot pass class here"); + return a; +} + +template +string format_string(const char* fmt, Args const&... args) { + return format_string_imp(fmt, unwrap(args)...); +} + +error_code capture_errno() { + _LIBCPP_ASSERT(errno, "Expected errno to be non-zero"); + return error_code(errno, generic_category()); +} + +template +T error_value(); +template <> +_LIBCPP_CONSTEXPR_AFTER_CXX11 void error_value() {} +template <> +bool error_value() { + return false; +} +template <> +uintmax_t error_value() { + return uintmax_t(-1); +} +template <> +_LIBCPP_CONSTEXPR_AFTER_CXX11 file_time_type error_value() { + return file_time_type::min(); +} +template <> +path error_value() { + return {}; +} + +template +struct ErrorHandler { + const char* func_name; + error_code* ec = nullptr; + const path* p1 = nullptr; + const path* p2 = nullptr; + + ErrorHandler(const char* fname, error_code* ec, const path* p1 = nullptr, + const path* p2 = nullptr) + : func_name(fname), ec(ec), p1(p1), p2(p2) { + if (ec) + ec->clear(); + } + + T report(const error_code& m_ec) const { + if (ec) { + *ec = m_ec; + return error_value(); + } + string what = string("in ") + func_name; + switch (bool(p1) + bool(p2)) { + case 0: + __throw_filesystem_error(what, m_ec); + case 1: + __throw_filesystem_error(what, *p1, m_ec); + case 2: + __throw_filesystem_error(what, *p1, *p2, m_ec); + } + _LIBCPP_UNREACHABLE(); + } + + template + T report(const error_code& m_ec, const char* msg, Args const&... args) const { + if (ec) { + *ec = m_ec; + return error_value(); + } + string what = + string("in ") + func_name + ": " + format_string(msg, args...); + switch (bool(p1) + bool(p2)) { + case 0: + __throw_filesystem_error(what, m_ec); + case 1: + __throw_filesystem_error(what, *p1, m_ec); + case 2: + __throw_filesystem_error(what, *p1, *p2, m_ec); + } + _LIBCPP_UNREACHABLE(); + } + + T report(errc const& err) const { return report(make_error_code(err)); } + + template + T report(errc const& err, const char* msg, Args const&... args) const { + return report(make_error_code(err), msg, args...); + } + +private: + ErrorHandler(ErrorHandler const&) = delete; + ErrorHandler& operator=(ErrorHandler const&) = delete; +}; + +using chrono::duration; +using chrono::duration_cast; + +using TimeSpec = struct ::timespec; +using StatT = struct ::stat; + +template ::value> +struct time_util_base { + using rep = typename FileTimeT::rep; + using fs_duration = typename FileTimeT::duration; + using fs_seconds = duration; + using fs_nanoseconds = duration; + using fs_microseconds = duration; + + static constexpr rep max_seconds = + duration_cast(FileTimeT::duration::max()).count(); + + static constexpr rep max_nsec = + duration_cast(FileTimeT::duration::max() - + fs_seconds(max_seconds)) + .count(); + + static constexpr rep min_seconds = + duration_cast(FileTimeT::duration::min()).count(); + + static constexpr rep min_nsec_timespec = + duration_cast( + (FileTimeT::duration::min() - fs_seconds(min_seconds)) + + fs_seconds(1)) + .count(); + +private: +#if _LIBCPP_STD_VER > 11 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) + static constexpr fs_duration get_min_nsecs() { + return duration_cast( + fs_nanoseconds(min_nsec_timespec) - + duration_cast(fs_seconds(1))); + } + // Static assert that these values properly round trip. + static_assert(fs_seconds(min_seconds) + get_min_nsecs() == + FileTimeT::duration::min(), + "value doesn't roundtrip"); + + static constexpr bool check_range() { + // This kinda sucks, but it's what happens when we don't have __int128_t. + if (sizeof(TimeT) == sizeof(rep)) { + typedef duration > Years; + return duration_cast(fs_seconds(max_seconds)) > Years(250) && + duration_cast(fs_seconds(min_seconds)) < Years(-250); + } + return max_seconds >= numeric_limits::max() && + min_seconds <= numeric_limits::min(); + } + static_assert(check_range(), "the representable range is unacceptable small"); +#endif +}; + +template +struct time_util_base { + using rep = typename FileTimeT::rep; + using fs_duration = typename FileTimeT::duration; + using fs_seconds = duration; + using fs_nanoseconds = duration; + using fs_microseconds = duration; + + static const rep max_seconds; + static const rep max_nsec; + static const rep min_seconds; + static const rep min_nsec_timespec; +}; + +template +const typename FileTimeT::rep + time_util_base::max_seconds = + duration_cast(FileTimeT::duration::max()).count(); + +template +const typename FileTimeT::rep time_util_base::max_nsec = + duration_cast(FileTimeT::duration::max() - + fs_seconds(max_seconds)) + .count(); + +template +const typename FileTimeT::rep + time_util_base::min_seconds = + duration_cast(FileTimeT::duration::min()).count(); + +template +const typename FileTimeT::rep + time_util_base::min_nsec_timespec = + duration_cast((FileTimeT::duration::min() - + fs_seconds(min_seconds)) + + fs_seconds(1)) + .count(); + +template +struct time_util : time_util_base { + using Base = time_util_base; + using Base::max_nsec; + using Base::max_seconds; + using Base::min_nsec_timespec; + using Base::min_seconds; + + using typename Base::fs_duration; + using typename Base::fs_microseconds; + using typename Base::fs_nanoseconds; + using typename Base::fs_seconds; + +public: + template + static _LIBCPP_CONSTEXPR_AFTER_CXX11 bool checked_set(CType* out, + ChronoType time) { + using Lim = numeric_limits; + if (time > Lim::max() || time < Lim::min()) + return false; + *out = static_cast(time); + return true; + } + + static _LIBCPP_CONSTEXPR_AFTER_CXX11 bool is_representable(TimeSpecT tm) { + if (tm.tv_sec >= 0) { + return tm.tv_sec < max_seconds || + (tm.tv_sec == max_seconds && tm.tv_nsec <= max_nsec); + } else if (tm.tv_sec == (min_seconds - 1)) { + return tm.tv_nsec >= min_nsec_timespec; + } else { + return tm.tv_sec >= min_seconds; + } + } + + static _LIBCPP_CONSTEXPR_AFTER_CXX11 bool is_representable(FileTimeT tm) { + auto secs = duration_cast(tm.time_since_epoch()); + auto nsecs = duration_cast(tm.time_since_epoch() - secs); + if (nsecs.count() < 0) { + secs = secs + fs_seconds(1); + nsecs = nsecs + fs_seconds(1); + } + using TLim = numeric_limits; + if (secs.count() >= 0) + return secs.count() <= TLim::max(); + return secs.count() >= TLim::min(); + } + + static _LIBCPP_CONSTEXPR_AFTER_CXX11 FileTimeT + convert_from_timespec(TimeSpecT tm) { + if (tm.tv_sec >= 0 || tm.tv_nsec == 0) { + return FileTimeT(fs_seconds(tm.tv_sec) + + duration_cast(fs_nanoseconds(tm.tv_nsec))); + } else { // tm.tv_sec < 0 + auto adj_subsec = duration_cast(fs_seconds(1) - + fs_nanoseconds(tm.tv_nsec)); + auto Dur = fs_seconds(tm.tv_sec + 1) - adj_subsec; + return FileTimeT(Dur); + } + } + + template + static _LIBCPP_CONSTEXPR_AFTER_CXX11 bool + set_times_checked(TimeT* sec_out, SubSecT* subsec_out, FileTimeT tp) { + auto dur = tp.time_since_epoch(); + auto sec_dur = duration_cast(dur); + auto subsec_dur = duration_cast(dur - sec_dur); + // The tv_nsec and tv_usec fields must not be negative so adjust accordingly + if (subsec_dur.count() < 0) { + if (sec_dur.count() > min_seconds) { + sec_dur = sec_dur - fs_seconds(1); + subsec_dur = subsec_dur + fs_seconds(1); + } else { + subsec_dur = fs_nanoseconds::zero(); + } + } + return checked_set(sec_out, sec_dur.count()) && + checked_set(subsec_out, subsec_dur.count()); + } + static _LIBCPP_CONSTEXPR_AFTER_CXX11 bool convert_to_timespec(TimeSpecT& dest, + FileTimeT tp) { + if (!is_representable(tp)) + return false; + return set_times_checked(&dest.tv_sec, &dest.tv_nsec, tp); + } +}; + +using fs_time = time_util; + +#if defined(__APPLE__) +TimeSpec extract_mtime(StatT const& st) { return st.st_mtimespec; } +TimeSpec extract_atime(StatT const& st) { return st.st_atimespec; } +#else +TimeSpec extract_mtime(StatT const& st) { return st.st_mtim; } +TimeSpec extract_atime(StatT const& st) { return st.st_atim; } +#endif + +// allow the utimes implementation to compile even it we're not going +// to use it. + +bool posix_utimes(const path& p, std::array const& TS, + error_code& ec) { + using namespace chrono; + auto Convert = [](long nsec) { + using int_type = decltype(std::declval< ::timeval>().tv_usec); + auto dur = duration_cast(nanoseconds(nsec)).count(); + return static_cast(dur); + }; + struct ::timeval ConvertedTS[2] = {{TS[0].tv_sec, Convert(TS[0].tv_nsec)}, + {TS[1].tv_sec, Convert(TS[1].tv_nsec)}}; + if (::utimes(p.c_str(), ConvertedTS) == -1) { + ec = capture_errno(); + return true; + } + return false; +} + +#if defined(_LIBCPP_USE_UTIMENSAT) +bool posix_utimensat(const path& p, std::array const& TS, + error_code& ec) { + if (::utimensat(AT_FDCWD, p.c_str(), TS.data(), 0) == -1) { + ec = capture_errno(); + return true; + } + return false; +} +#endif + +bool set_file_times(const path& p, std::array const& TS, + error_code& ec) { +#if !defined(_LIBCPP_USE_UTIMENSAT) + return posix_utimes(p, TS, ec); +#else + return posix_utimensat(p, TS, ec); +#endif +} + +} // namespace +} // end namespace detail + +} // namespace android::hardware::automotive::filesystem + +#endif // AUTO_FILESYSTEM_COMMON_H +/* clang-format on */ diff --git a/automotive/can/1.0/default/libc++fs/src/filesystem/operations.cpp b/automotive/can/1.0/default/libc++fs/src/filesystem/operations.cpp new file mode 100644 index 0000000000..404c0bd4c9 --- /dev/null +++ b/automotive/can/1.0/default/libc++fs/src/filesystem/operations.cpp @@ -0,0 +1,1773 @@ +//===--------------------- filesystem/ops.cpp -----------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +/* clang-format off */ +#include "automotive/filesystem" +#include +#include +#include +#include /* for unique_path */ +#include +#include +#include +#include +#include + +#include "filesystem_common.h" + +#include +#include +#include +#include +#include /* values for fchmodat */ + +#if defined(__linux__) +#include +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33) +#include +#define _LIBCPP_USE_SENDFILE +#endif +#elif defined(__APPLE__) || __has_include() +#include +#define _LIBCPP_USE_COPYFILE +#endif + +#if !defined(__APPLE__) +#define _LIBCPP_USE_CLOCK_GETTIME +#endif + +#if !defined(CLOCK_REALTIME) || !defined(_LIBCPP_USE_CLOCK_GETTIME) +#include // for gettimeofday and timeval +#endif // !defined(CLOCK_REALTIME) + +#if defined(_LIBCPP_COMPILER_GCC) +#if _GNUC_VER < 500 +#pragma GCC diagnostic ignored "-Wmissing-field-initializers" +#endif +#endif + +namespace android::hardware::automotive::filesystem { + +#ifdef _VSTD_FS +#pragma push_macro("_VSTD_FS") +#else +#define _LIBAUTO_UNDEF_VSTD_FS +#endif +#define _VSTD_FS android::hardware::automotive::filesystem + +namespace { +namespace parser { + +using string_view_t = path::__string_view; +using string_view_pair = pair; +using PosPtr = path::value_type const*; + +struct PathParser { + enum ParserState : unsigned char { + // Zero is a special sentinel value used by default constructed iterators. + PS_BeforeBegin = path::iterator::_BeforeBegin, + PS_InRootName = path::iterator::_InRootName, + PS_InRootDir = path::iterator::_InRootDir, + PS_InFilenames = path::iterator::_InFilenames, + PS_InTrailingSep = path::iterator::_InTrailingSep, + PS_AtEnd = path::iterator::_AtEnd + }; + + const string_view_t Path; + string_view_t RawEntry; + ParserState State; + +private: + PathParser(string_view_t P, ParserState State) noexcept : Path(P), + State(State) {} + +public: + PathParser(string_view_t P, string_view_t E, unsigned char S) + : Path(P), RawEntry(E), State(static_cast(S)) { + // S cannot be '0' or PS_BeforeBegin. + } + + static PathParser CreateBegin(string_view_t P) noexcept { + PathParser PP(P, PS_BeforeBegin); + PP.increment(); + return PP; + } + + static PathParser CreateEnd(string_view_t P) noexcept { + PathParser PP(P, PS_AtEnd); + return PP; + } + + PosPtr peek() const noexcept { + auto TkEnd = getNextTokenStartPos(); + auto End = getAfterBack(); + return TkEnd == End ? nullptr : TkEnd; + } + + void increment() noexcept { + const PosPtr End = getAfterBack(); + const PosPtr Start = getNextTokenStartPos(); + if (Start == End) + return makeState(PS_AtEnd); + + switch (State) { + case PS_BeforeBegin: { + PosPtr TkEnd = consumeSeparator(Start, End); + if (TkEnd) + return makeState(PS_InRootDir, Start, TkEnd); + else + return makeState(PS_InFilenames, Start, consumeName(Start, End)); + } + case PS_InRootDir: + return makeState(PS_InFilenames, Start, consumeName(Start, End)); + + case PS_InFilenames: { + PosPtr SepEnd = consumeSeparator(Start, End); + if (SepEnd != End) { + PosPtr TkEnd = consumeName(SepEnd, End); + if (TkEnd) + return makeState(PS_InFilenames, SepEnd, TkEnd); + } + return makeState(PS_InTrailingSep, Start, SepEnd); + } + + case PS_InTrailingSep: + return makeState(PS_AtEnd); + + case PS_InRootName: + case PS_AtEnd: + _LIBCPP_UNREACHABLE(); + } + } + + void decrement() noexcept { + const PosPtr REnd = getBeforeFront(); + const PosPtr RStart = getCurrentTokenStartPos() - 1; + if (RStart == REnd) // we're decrementing the begin + return makeState(PS_BeforeBegin); + + switch (State) { + case PS_AtEnd: { + // Try to consume a trailing separator or root directory first. + if (PosPtr SepEnd = consumeSeparator(RStart, REnd)) { + if (SepEnd == REnd) + return makeState(PS_InRootDir, Path.data(), RStart + 1); + return makeState(PS_InTrailingSep, SepEnd + 1, RStart + 1); + } else { + PosPtr TkStart = consumeName(RStart, REnd); + return makeState(PS_InFilenames, TkStart + 1, RStart + 1); + } + } + case PS_InTrailingSep: + return makeState(PS_InFilenames, consumeName(RStart, REnd) + 1, + RStart + 1); + case PS_InFilenames: { + PosPtr SepEnd = consumeSeparator(RStart, REnd); + if (SepEnd == REnd) + return makeState(PS_InRootDir, Path.data(), RStart + 1); + PosPtr TkEnd = consumeName(SepEnd, REnd); + return makeState(PS_InFilenames, TkEnd + 1, SepEnd + 1); + } + case PS_InRootDir: + // return makeState(PS_InRootName, Path.data(), RStart + 1); + case PS_InRootName: + case PS_BeforeBegin: + _LIBCPP_UNREACHABLE(); + } + } + + /// \brief Return a view with the "preferred representation" of the current + /// element. For example trailing separators are represented as a '.' + string_view_t operator*() const noexcept { + switch (State) { + case PS_BeforeBegin: + case PS_AtEnd: + return ""; + case PS_InRootDir: + return "/"; + case PS_InTrailingSep: + return ""; + case PS_InRootName: + case PS_InFilenames: + return RawEntry; + } + _LIBCPP_UNREACHABLE(); + } + + explicit operator bool() const noexcept { + return State != PS_BeforeBegin && State != PS_AtEnd; + } + + PathParser& operator++() noexcept { + increment(); + return *this; + } + + PathParser& operator--() noexcept { + decrement(); + return *this; + } + + bool atEnd() const noexcept { + return State == PS_AtEnd; + } + + bool inRootDir() const noexcept { + return State == PS_InRootDir; + } + + bool inRootName() const noexcept { + return State == PS_InRootName; + } + + bool inRootPath() const noexcept { + return inRootName() || inRootDir(); + } + +private: + void makeState(ParserState NewState, PosPtr Start, PosPtr End) noexcept { + State = NewState; + RawEntry = string_view_t(Start, End - Start); + } + void makeState(ParserState NewState) noexcept { + State = NewState; + RawEntry = {}; + } + + PosPtr getAfterBack() const noexcept { return Path.data() + Path.size(); } + + PosPtr getBeforeFront() const noexcept { return Path.data() - 1; } + + /// \brief Return a pointer to the first character after the currently + /// lexed element. + PosPtr getNextTokenStartPos() const noexcept { + switch (State) { + case PS_BeforeBegin: + return Path.data(); + case PS_InRootName: + case PS_InRootDir: + case PS_InFilenames: + return &RawEntry.back() + 1; + case PS_InTrailingSep: + case PS_AtEnd: + return getAfterBack(); + } + _LIBCPP_UNREACHABLE(); + } + + /// \brief Return a pointer to the first character in the currently lexed + /// element. + PosPtr getCurrentTokenStartPos() const noexcept { + switch (State) { + case PS_BeforeBegin: + case PS_InRootName: + return &Path.front(); + case PS_InRootDir: + case PS_InFilenames: + case PS_InTrailingSep: + return &RawEntry.front(); + case PS_AtEnd: + return &Path.back() + 1; + } + _LIBCPP_UNREACHABLE(); + } + + PosPtr consumeSeparator(PosPtr P, PosPtr End) const noexcept { + if (P == End || *P != '/') + return nullptr; + const int Inc = P < End ? 1 : -1; + P += Inc; + while (P != End && *P == '/') + P += Inc; + return P; + } + + PosPtr consumeName(PosPtr P, PosPtr End) const noexcept { + if (P == End || *P == '/') + return nullptr; + const int Inc = P < End ? 1 : -1; + P += Inc; + while (P != End && *P != '/') + P += Inc; + return P; + } +}; + +string_view_pair separate_filename(string_view_t const& s) { + if (s == "." || s == ".." || s.empty()) + return string_view_pair{s, ""}; + auto pos = s.find_last_of('.'); + if (pos == string_view_t::npos || pos == 0) + return string_view_pair{s, string_view_t{}}; + return string_view_pair{s.substr(0, pos), s.substr(pos)}; +} + +string_view_t createView(PosPtr S, PosPtr E) noexcept { + return {S, static_cast(E - S) + 1}; +} + +} // namespace parser +} // namespace + +// POSIX HELPERS + +namespace detail { +namespace { + +using value_type = path::value_type; +using string_type = path::string_type; + +struct FileDescriptor { + const path& name; + int fd = -1; + StatT m_stat; + file_status m_status; + + template + static FileDescriptor create(const path* p, error_code& ec, Args... args) { + ec.clear(); + int fd; + if ((fd = ::open(p->c_str(), args...)) == -1) { + ec = capture_errno(); + return FileDescriptor{p}; + } + return FileDescriptor(p, fd); + } + + template + static FileDescriptor create_with_status(const path* p, error_code& ec, + Args... args) { + FileDescriptor fd = create(p, ec, args...); + if (!ec) + fd.refresh_status(ec); + + return fd; + } + + file_status get_status() const { return m_status; } + StatT const& get_stat() const { return m_stat; } + + bool status_known() const { return _VSTD_FS::status_known(m_status); } + + file_status refresh_status(error_code& ec); + + void close() noexcept { + if (fd != -1) + ::close(fd); + fd = -1; + } + + FileDescriptor(FileDescriptor&& other) + : name(other.name), fd(other.fd), m_stat(other.m_stat), + m_status(other.m_status) { + other.fd = -1; + other.m_status = file_status{}; + } + + ~FileDescriptor() { close(); } + + FileDescriptor(FileDescriptor const&) = delete; + FileDescriptor& operator=(FileDescriptor const&) = delete; + +private: + explicit FileDescriptor(const path* p, int fd = -1) : name(*p), fd(fd) {} +}; + +perms posix_get_perms(const StatT& st) noexcept { + return static_cast(st.st_mode) & perms::mask; +} + +::mode_t posix_convert_perms(perms prms) { + return static_cast< ::mode_t>(prms & perms::mask); +} + +file_status create_file_status(error_code& m_ec, path const& p, + const StatT& path_stat, error_code* ec) { + if (ec) + *ec = m_ec; + if (m_ec && (m_ec.value() == ENOENT || m_ec.value() == ENOTDIR)) { + return file_status(file_type::not_found); + } else if (m_ec) { + ErrorHandler err("posix_stat", ec, &p); + err.report(m_ec, "failed to determine attributes for the specified path"); + return file_status(file_type::none); + } + // else + + file_status fs_tmp; + auto const mode = path_stat.st_mode; + if (S_ISLNK(mode)) + fs_tmp.type(file_type::symlink); + else if (S_ISREG(mode)) + fs_tmp.type(file_type::regular); + else if (S_ISDIR(mode)) + fs_tmp.type(file_type::directory); + else if (S_ISBLK(mode)) + fs_tmp.type(file_type::block); + else if (S_ISCHR(mode)) + fs_tmp.type(file_type::character); + else if (S_ISFIFO(mode)) + fs_tmp.type(file_type::fifo); + else if (S_ISSOCK(mode)) + fs_tmp.type(file_type::socket); + else + fs_tmp.type(file_type::unknown); + + fs_tmp.permissions(detail::posix_get_perms(path_stat)); + return fs_tmp; +} + +file_status posix_stat(path const& p, StatT& path_stat, error_code* ec) { + error_code m_ec; + if (::stat(p.c_str(), &path_stat) == -1) + m_ec = detail::capture_errno(); + return create_file_status(m_ec, p, path_stat, ec); +} + +file_status posix_stat(path const& p, error_code* ec) { + StatT path_stat; + return posix_stat(p, path_stat, ec); +} + +file_status posix_lstat(path const& p, StatT& path_stat, error_code* ec) { + error_code m_ec; + if (::lstat(p.c_str(), &path_stat) == -1) + m_ec = detail::capture_errno(); + return create_file_status(m_ec, p, path_stat, ec); +} + +file_status posix_lstat(path const& p, error_code* ec) { + StatT path_stat; + return posix_lstat(p, path_stat, ec); +} + +bool posix_ftruncate(const FileDescriptor& fd, size_t to_size, error_code& ec) { + if (::ftruncate(fd.fd, to_size) == -1) { + ec = capture_errno(); + return true; + } + ec.clear(); + return false; +} + +bool posix_fchmod(const FileDescriptor& fd, const StatT& st, error_code& ec) { + if (::fchmod(fd.fd, st.st_mode) == -1) { + ec = capture_errno(); + return true; + } + ec.clear(); + return false; +} + +bool stat_equivalent(const StatT& st1, const StatT& st2) { + return (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino); +} + +file_status FileDescriptor::refresh_status(error_code& ec) { + // FD must be open and good. + m_status = file_status{}; + m_stat = {}; + error_code m_ec; + if (::fstat(fd, &m_stat) == -1) + m_ec = capture_errno(); + m_status = create_file_status(m_ec, name, m_stat, &ec); + return m_status; +} +} // namespace +} // end namespace detail + +using detail::capture_errno; +using detail::ErrorHandler; +using detail::StatT; +using detail::TimeSpec; +using parser::createView; +using parser::PathParser; +using parser::string_view_t; + +const bool _FilesystemClock::is_steady; + +_FilesystemClock::time_point _FilesystemClock::now() noexcept { + typedef chrono::duration __secs; +#if defined(_LIBCPP_USE_CLOCK_GETTIME) && defined(CLOCK_REALTIME) + typedef chrono::duration __nsecs; + struct timespec tp; + if (0 != clock_gettime(CLOCK_REALTIME, &tp)) + __throw_system_error(errno, "clock_gettime(CLOCK_REALTIME) failed"); + return time_point(__secs(tp.tv_sec) + + chrono::duration_cast(__nsecs(tp.tv_nsec))); +#else + typedef chrono::duration __microsecs; + timeval tv; + gettimeofday(&tv, 0); + return time_point(__secs(tv.tv_sec) + __microsecs(tv.tv_usec)); +#endif // _LIBCPP_USE_CLOCK_GETTIME && CLOCK_REALTIME +} + +filesystem_error::~filesystem_error() {} + +void filesystem_error::__create_what(int __num_paths) { + const char* derived_what = system_error::what(); + __storage_->__what_ = [&]() -> string { + const char* p1 = path1().native().empty() ? "\"\"" : path1().c_str(); + const char* p2 = path2().native().empty() ? "\"\"" : path2().c_str(); + switch (__num_paths) { + default: + return detail::format_string("filesystem error: %s", derived_what); + case 1: + return detail::format_string("filesystem error: %s [%s]", derived_what, + p1); + case 2: + return detail::format_string("filesystem error: %s [%s] [%s]", + derived_what, p1, p2); + } + }(); +} + +static path __do_absolute(const path& p, path* cwd, error_code* ec) { + if (ec) + ec->clear(); + if (p.is_absolute()) + return p; + *cwd = __current_path(ec); + if (ec && *ec) + return {}; + return (*cwd) / p; +} + +path __absolute(const path& p, error_code* ec) { + path cwd; + return __do_absolute(p, &cwd, ec); +} + +path __canonical(path const& orig_p, error_code* ec) { + path cwd; + ErrorHandler err("canonical", ec, &orig_p, &cwd); + + path p = __do_absolute(orig_p, &cwd, ec); + char buff[PATH_MAX + 1]; + char* ret; + if ((ret = ::realpath(p.c_str(), buff)) == nullptr) + return err.report(capture_errno()); + return {ret}; +} + +void __copy(const path& from, const path& to, copy_options options, + error_code* ec) { + ErrorHandler err("copy", ec, &from, &to); + + const bool sym_status = bool( + options & (copy_options::create_symlinks | copy_options::skip_symlinks)); + + const bool sym_status2 = bool(options & copy_options::copy_symlinks); + + error_code m_ec1; + StatT f_st = {}; + const file_status f = sym_status || sym_status2 + ? detail::posix_lstat(from, f_st, &m_ec1) + : detail::posix_stat(from, f_st, &m_ec1); + if (m_ec1) + return err.report(m_ec1); + + StatT t_st = {}; + const file_status t = sym_status ? detail::posix_lstat(to, t_st, &m_ec1) + : detail::posix_stat(to, t_st, &m_ec1); + + if (not status_known(t)) + return err.report(m_ec1); + + if (!exists(f) || is_other(f) || is_other(t) || + (is_directory(f) && is_regular_file(t)) || + detail::stat_equivalent(f_st, t_st)) { + return err.report(errc::function_not_supported); + } + + if (ec) + ec->clear(); + + if (is_symlink(f)) { + if (bool(copy_options::skip_symlinks & options)) { + // do nothing + } else if (not exists(t)) { + __copy_symlink(from, to, ec); + } else { + return err.report(errc::file_exists); + } + return; + } else if (is_regular_file(f)) { + if (bool(copy_options::directories_only & options)) { + // do nothing + } else if (bool(copy_options::create_symlinks & options)) { + __create_symlink(from, to, ec); + } else if (bool(copy_options::create_hard_links & options)) { + __create_hard_link(from, to, ec); + } else if (is_directory(t)) { + __copy_file(from, to / from.filename(), options, ec); + } else { + __copy_file(from, to, options, ec); + } + return; + } else if (is_directory(f) && bool(copy_options::create_symlinks & options)) { + return err.report(errc::is_a_directory); + } else if (is_directory(f) && (bool(copy_options::recursive & options) || + copy_options::none == options)) { + + if (!exists(t)) { + // create directory to with attributes from 'from'. + __create_directory(to, from, ec); + if (ec && *ec) { + return; + } + } + directory_iterator it = + ec ? directory_iterator(from, *ec) : directory_iterator(from); + if (ec && *ec) { + return; + } + error_code m_ec2; + for (; it != directory_iterator(); it.increment(m_ec2)) { + if (m_ec2) { + return err.report(m_ec2); + } + __copy(it->path(), to / it->path().filename(), + options | copy_options::__in_recursive_copy, ec); + if (ec && *ec) { + return; + } + } + } +} + +namespace detail { +namespace { + +#ifdef _LIBCPP_USE_SENDFILE +bool copy_file_impl_sendfile(FileDescriptor& read_fd, FileDescriptor& write_fd, + error_code& ec) { + + size_t count = read_fd.get_stat().st_size; + do { + ssize_t res; + if ((res = ::sendfile(write_fd.fd, read_fd.fd, nullptr, count)) == -1) { + ec = capture_errno(); + return false; + } + count -= res; + } while (count > 0); + + ec.clear(); + + return true; +} +#elif defined(_LIBCPP_USE_COPYFILE) +bool copy_file_impl_copyfile(FileDescriptor& read_fd, FileDescriptor& write_fd, + error_code& ec) { + struct CopyFileState { + copyfile_state_t state; + CopyFileState() { state = copyfile_state_alloc(); } + ~CopyFileState() { copyfile_state_free(state); } + + private: + CopyFileState(CopyFileState const&) = delete; + CopyFileState& operator=(CopyFileState const&) = delete; + }; + + CopyFileState cfs; + if (fcopyfile(read_fd.fd, write_fd.fd, cfs.state, COPYFILE_DATA) < 0) { + ec = capture_errno(); + return false; + } + + ec.clear(); + return true; +} +#endif + +// Note: This function isn't guarded by ifdef's even though it may be unused +// in order to assure it still compiles. +__attribute__((unused)) bool copy_file_impl_default(FileDescriptor& read_fd, + FileDescriptor& write_fd, + error_code& ec) { + ifstream in; + in.__open(read_fd.fd, ios::binary); + if (!in.is_open()) { + // This assumes that __open didn't reset the error code. + ec = capture_errno(); + return false; + } + ofstream out; + out.__open(write_fd.fd, ios::binary); + if (!out.is_open()) { + ec = capture_errno(); + return false; + } + + if (in.good() && out.good()) { + using InIt = istreambuf_iterator; + using OutIt = ostreambuf_iterator; + InIt bin(in); + InIt ein; + OutIt bout(out); + copy(bin, ein, bout); + } + if (out.fail() || in.fail()) { + ec = make_error_code(errc::io_error); + return false; + } + + ec.clear(); + return true; +} + +bool copy_file_impl(FileDescriptor& from, FileDescriptor& to, error_code& ec) { +#if defined(_LIBCPP_USE_SENDFILE) + return copy_file_impl_sendfile(from, to, ec); +#elif defined(_LIBCPP_USE_COPYFILE) + return copy_file_impl_copyfile(from, to, ec); +#else + return copy_file_impl_default(from, to, ec); +#endif +} + +} // namespace +} // namespace detail + +bool __copy_file(const path& from, const path& to, copy_options options, + error_code* ec) { + using detail::FileDescriptor; + ErrorHandler err("copy_file", ec, &to, &from); + + error_code m_ec; + FileDescriptor from_fd = + FileDescriptor::create_with_status(&from, m_ec, O_RDONLY | O_NONBLOCK); + if (m_ec) + return err.report(m_ec); + + auto from_st = from_fd.get_status(); + StatT const& from_stat = from_fd.get_stat(); + if (!is_regular_file(from_st)) { + if (not m_ec) + m_ec = make_error_code(errc::not_supported); + return err.report(m_ec); + } + + const bool skip_existing = bool(copy_options::skip_existing & options); + const bool update_existing = bool(copy_options::update_existing & options); + const bool overwrite_existing = + bool(copy_options::overwrite_existing & options); + + StatT to_stat_path; + file_status to_st = detail::posix_stat(to, to_stat_path, &m_ec); + if (!status_known(to_st)) + return err.report(m_ec); + + const bool to_exists = exists(to_st); + if (to_exists && !is_regular_file(to_st)) + return err.report(errc::not_supported); + + if (to_exists && detail::stat_equivalent(from_stat, to_stat_path)) + return err.report(errc::file_exists); + + if (to_exists && skip_existing) + return false; + + bool ShouldCopy = [&]() { + if (to_exists && update_existing) { + auto from_time = detail::extract_mtime(from_stat); + auto to_time = detail::extract_mtime(to_stat_path); + if (from_time.tv_sec < to_time.tv_sec) + return false; + if (from_time.tv_sec == to_time.tv_sec && + from_time.tv_nsec <= to_time.tv_nsec) + return false; + return true; + } + if (!to_exists || overwrite_existing) + return true; + return err.report(errc::file_exists); + }(); + if (!ShouldCopy) + return false; + + // Don't truncate right away. We may not be opening the file we originally + // looked at; we'll check this later. + int to_open_flags = O_WRONLY; + if (!to_exists) + to_open_flags |= O_CREAT; + FileDescriptor to_fd = FileDescriptor::create_with_status( + &to, m_ec, to_open_flags, from_stat.st_mode); + if (m_ec) + return err.report(m_ec); + + if (to_exists) { + // Check that the file we initially stat'ed is equivalent to the one + // we opened. + // FIXME: report this better. + if (!detail::stat_equivalent(to_stat_path, to_fd.get_stat())) + return err.report(errc::bad_file_descriptor); + + // Set the permissions and truncate the file we opened. + if (detail::posix_fchmod(to_fd, from_stat, m_ec)) + return err.report(m_ec); + if (detail::posix_ftruncate(to_fd, 0, m_ec)) + return err.report(m_ec); + } + + if (!copy_file_impl(from_fd, to_fd, m_ec)) { + // FIXME: Remove the dest file if we failed, and it didn't exist previously. + return err.report(m_ec); + } + + return true; +} + +void __copy_symlink(const path& existing_symlink, const path& new_symlink, + error_code* ec) { + const path real_path(__read_symlink(existing_symlink, ec)); + if (ec && *ec) { + return; + } + // NOTE: proposal says you should detect if you should call + // create_symlink or create_directory_symlink. I don't think this + // is needed with POSIX + __create_symlink(real_path, new_symlink, ec); +} + +bool __create_directories(const path& p, error_code* ec) { + ErrorHandler err("create_directories", ec, &p); + + error_code m_ec; + auto const st = detail::posix_stat(p, &m_ec); + if (!status_known(st)) + return err.report(m_ec); + else if (is_directory(st)) + return false; + else if (exists(st)) + return err.report(errc::file_exists); + + const path parent = p.parent_path(); + if (!parent.empty()) { + const file_status parent_st = status(parent, m_ec); + if (not status_known(parent_st)) + return err.report(m_ec); + if (not exists(parent_st)) { + __create_directories(parent, ec); + if (ec && *ec) { + return false; + } + } + } + return __create_directory(p, ec); +} + +bool __create_directory(const path& p, error_code* ec) { + ErrorHandler err("create_directory", ec, &p); + + if (::mkdir(p.c_str(), static_cast(perms::all)) == 0) + return true; + if (errno != EEXIST) + err.report(capture_errno()); + return false; +} + +bool __create_directory(path const& p, path const& attributes, error_code* ec) { + ErrorHandler err("create_directory", ec, &p, &attributes); + + StatT attr_stat; + error_code mec; + auto st = detail::posix_stat(attributes, attr_stat, &mec); + if (!status_known(st)) + return err.report(mec); + if (!is_directory(st)) + return err.report(errc::not_a_directory, + "the specified attribute path is invalid"); + + if (::mkdir(p.c_str(), attr_stat.st_mode) == 0) + return true; + if (errno != EEXIST) + err.report(capture_errno()); + return false; +} + +void __create_directory_symlink(path const& from, path const& to, + error_code* ec) { + ErrorHandler err("create_directory_symlink", ec, &from, &to); + if (::symlink(from.c_str(), to.c_str()) != 0) + return err.report(capture_errno()); +} + +void __create_hard_link(const path& from, const path& to, error_code* ec) { + ErrorHandler err("create_hard_link", ec, &from, &to); + if (::link(from.c_str(), to.c_str()) == -1) + return err.report(capture_errno()); +} + +void __create_symlink(path const& from, path const& to, error_code* ec) { + ErrorHandler err("create_symlink", ec, &from, &to); + if (::symlink(from.c_str(), to.c_str()) == -1) + return err.report(capture_errno()); +} + +path __current_path(error_code* ec) { + ErrorHandler err("current_path", ec); + + auto size = ::pathconf(".", _PC_PATH_MAX); + _LIBCPP_ASSERT(size >= 0, "pathconf returned a 0 as max size"); + + auto buff = unique_ptr(new char[size + 1]); + char* ret; + if ((ret = ::getcwd(buff.get(), static_cast(size))) == nullptr) + return err.report(capture_errno(), "call to getcwd failed"); + + return {buff.get()}; +} + +void __current_path(const path& p, error_code* ec) { + ErrorHandler err("current_path", ec, &p); + if (::chdir(p.c_str()) == -1) + err.report(capture_errno()); +} + +bool __equivalent(const path& p1, const path& p2, error_code* ec) { + ErrorHandler err("equivalent", ec, &p1, &p2); + + error_code ec1, ec2; + StatT st1 = {}, st2 = {}; + auto s1 = detail::posix_stat(p1.native(), st1, &ec1); + if (!exists(s1)) + return err.report(errc::not_supported); + auto s2 = detail::posix_stat(p2.native(), st2, &ec2); + if (!exists(s2)) + return err.report(errc::not_supported); + + return detail::stat_equivalent(st1, st2); +} + +uintmax_t __file_size(const path& p, error_code* ec) { + ErrorHandler err("file_size", ec, &p); + + error_code m_ec; + StatT st; + file_status fst = detail::posix_stat(p, st, &m_ec); + if (!exists(fst) || !is_regular_file(fst)) { + errc error_kind = + is_directory(fst) ? errc::is_a_directory : errc::not_supported; + if (!m_ec) + m_ec = make_error_code(error_kind); + return err.report(m_ec); + } + // is_regular_file(p) == true + return static_cast(st.st_size); +} + +uintmax_t __hard_link_count(const path& p, error_code* ec) { + ErrorHandler err("hard_link_count", ec, &p); + + error_code m_ec; + StatT st; + detail::posix_stat(p, st, &m_ec); + if (m_ec) + return err.report(m_ec); + return static_cast(st.st_nlink); +} + +bool __fs_is_empty(const path& p, error_code* ec) { + ErrorHandler err("is_empty", ec, &p); + + error_code m_ec; + StatT pst; + auto st = detail::posix_stat(p, pst, &m_ec); + if (m_ec) + return err.report(m_ec); + else if (!is_directory(st) && !is_regular_file(st)) + return err.report(errc::not_supported); + else if (is_directory(st)) { + auto it = ec ? directory_iterator(p, *ec) : directory_iterator(p); + if (ec && *ec) + return false; + return it == directory_iterator{}; + } else if (is_regular_file(st)) + return static_cast(pst.st_size) == 0; + + _LIBCPP_UNREACHABLE(); +} + +static file_time_type __extract_last_write_time(const path& p, const StatT& st, + error_code* ec) { + using detail::fs_time; + ErrorHandler err("last_write_time", ec, &p); + + auto ts = detail::extract_mtime(st); + if (!fs_time::is_representable(ts)) + return err.report(errc::value_too_large); + + return fs_time::convert_from_timespec(ts); +} + +file_time_type __last_write_time(const path& p, error_code* ec) { + using namespace chrono; + ErrorHandler err("last_write_time", ec, &p); + + error_code m_ec; + StatT st; + detail::posix_stat(p, st, &m_ec); + if (m_ec) + return err.report(m_ec); + return __extract_last_write_time(p, st, ec); +} + +void __last_write_time(const path& p, file_time_type new_time, error_code* ec) { + using detail::fs_time; + ErrorHandler err("last_write_time", ec, &p); + + error_code m_ec; + array tbuf; +#if !defined(_LIBCPP_USE_UTIMENSAT) + // This implementation has a race condition between determining the + // last access time and attempting to set it to the same value using + // ::utimes + StatT st; + file_status fst = detail::posix_stat(p, st, &m_ec); + if (m_ec) + return err.report(m_ec); + tbuf[0] = detail::extract_atime(st); +#else + tbuf[0].tv_sec = 0; + tbuf[0].tv_nsec = UTIME_OMIT; +#endif + if (!fs_time::convert_to_timespec(tbuf[1], new_time)) + return err.report(errc::value_too_large); + + detail::set_file_times(p, tbuf, m_ec); + if (m_ec) + return err.report(m_ec); +} + +void __permissions(const path& p, perms prms, perm_options opts, + error_code* ec) { + ErrorHandler err("permissions", ec, &p); + + auto has_opt = [&](perm_options o) { return bool(o & opts); }; + const bool resolve_symlinks = !has_opt(perm_options::nofollow); + const bool add_perms = has_opt(perm_options::add); + const bool remove_perms = has_opt(perm_options::remove); + _LIBCPP_ASSERT( + (add_perms + remove_perms + has_opt(perm_options::replace)) == 1, + "One and only one of the perm_options constants replace, add, or remove " + "is present in opts"); + + bool set_sym_perms = false; + prms &= perms::mask; + if (!resolve_symlinks || (add_perms || remove_perms)) { + error_code m_ec; + file_status st = resolve_symlinks ? detail::posix_stat(p, &m_ec) + : detail::posix_lstat(p, &m_ec); + set_sym_perms = is_symlink(st); + if (m_ec) + return err.report(m_ec); + _LIBCPP_ASSERT(st.permissions() != perms::unknown, + "Permissions unexpectedly unknown"); + if (add_perms) + prms |= st.permissions(); + else if (remove_perms) + prms = st.permissions() & ~prms; + } + const auto real_perms = detail::posix_convert_perms(prms); + +#if defined(AT_SYMLINK_NOFOLLOW) && defined(AT_FDCWD) + const int flags = set_sym_perms ? AT_SYMLINK_NOFOLLOW : 0; + if (::fchmodat(AT_FDCWD, p.c_str(), real_perms, flags) == -1) { + return err.report(capture_errno()); + } +#else + if (set_sym_perms) + return err.report(errc::operation_not_supported); + if (::chmod(p.c_str(), real_perms) == -1) { + return err.report(capture_errno()); + } +#endif +} + +path __read_symlink(const path& p, error_code* ec) { + ErrorHandler err("read_symlink", ec, &p); + + char buff[PATH_MAX + 1]; + error_code m_ec; + ::ssize_t ret; + if ((ret = ::readlink(p.c_str(), buff, PATH_MAX)) == -1) { + return err.report(capture_errno()); + } + _LIBCPP_ASSERT(ret <= PATH_MAX, "TODO"); + _LIBCPP_ASSERT(ret > 0, "TODO"); + buff[ret] = 0; + return {buff}; +} + +bool __remove(const path& p, error_code* ec) { + ErrorHandler err("remove", ec, &p); + if (::remove(p.c_str()) == -1) { + if (errno != ENOENT) + err.report(capture_errno()); + return false; + } + return true; +} + +namespace { + +uintmax_t remove_all_impl(path const& p, error_code& ec) { + const auto npos = static_cast(-1); + const file_status st = __symlink_status(p, &ec); + if (ec) + return npos; + uintmax_t count = 1; + if (is_directory(st)) { + for (directory_iterator it(p, ec); !ec && it != directory_iterator(); + it.increment(ec)) { + auto other_count = remove_all_impl(it->path(), ec); + if (ec) + return npos; + count += other_count; + } + if (ec) + return npos; + } + if (!__remove(p, &ec)) + return npos; + return count; +} + +} // end namespace + +uintmax_t __remove_all(const path& p, error_code* ec) { + ErrorHandler err("remove_all", ec, &p); + + error_code mec; + auto count = remove_all_impl(p, mec); + if (mec) { + if (mec == errc::no_such_file_or_directory) + return 0; + return err.report(mec); + } + return count; +} + +void __rename(const path& from, const path& to, error_code* ec) { + ErrorHandler err("rename", ec, &from, &to); + if (::rename(from.c_str(), to.c_str()) == -1) + err.report(capture_errno()); +} + +void __resize_file(const path& p, uintmax_t size, error_code* ec) { + ErrorHandler err("resize_file", ec, &p); + if (::truncate(p.c_str(), static_cast< ::off_t>(size)) == -1) + return err.report(capture_errno()); +} + +space_info __space(const path& p, error_code* ec) { + ErrorHandler err("space", ec, &p); + space_info si; + struct statvfs m_svfs = {}; + if (::statvfs(p.c_str(), &m_svfs) == -1) { + err.report(capture_errno()); + si.capacity = si.free = si.available = static_cast(-1); + return si; + } + // Multiply with overflow checking. + auto do_mult = [&](uintmax_t& out, uintmax_t other) { + out = other * m_svfs.f_frsize; + if (other == 0 || out / other != m_svfs.f_frsize) + out = static_cast(-1); + }; + do_mult(si.capacity, m_svfs.f_blocks); + do_mult(si.free, m_svfs.f_bfree); + do_mult(si.available, m_svfs.f_bavail); + return si; +} + +file_status __status(const path& p, error_code* ec) { + return detail::posix_stat(p, ec); +} + +file_status __symlink_status(const path& p, error_code* ec) { + return detail::posix_lstat(p, ec); +} + +path __temp_directory_path(error_code* ec) { + ErrorHandler err("temp_directory_path", ec); + + const char* env_paths[] = {"TMPDIR", "TMP", "TEMP", "TEMPDIR"}; + const char* ret = nullptr; + + for (auto& ep : env_paths) + if ((ret = getenv(ep))) + break; + if (ret == nullptr) + ret = "/tmp"; + + path p(ret); + error_code m_ec; + file_status st = detail::posix_stat(p, &m_ec); + if (!status_known(st)) + return err.report(m_ec, "cannot access path \"%s\"", p); + + if (!exists(st) || !is_directory(st)) + return err.report(errc::not_a_directory, "path \"%s\" is not a directory", + p); + + return p; +} + +path __weakly_canonical(const path& p, error_code* ec) { + ErrorHandler err("weakly_canonical", ec, &p); + + if (p.empty()) + return __canonical("", ec); + + path result; + path tmp; + tmp.__reserve(p.native().size()); + auto PP = PathParser::CreateEnd(p.native()); + --PP; + vector DNEParts; + + while (PP.State != PathParser::PS_BeforeBegin) { + tmp.assign(createView(p.native().data(), &PP.RawEntry.back())); + error_code m_ec; + file_status st = __status(tmp, &m_ec); + if (!status_known(st)) { + return err.report(m_ec); + } else if (exists(st)) { + result = __canonical(tmp, ec); + break; + } + DNEParts.push_back(*PP); + --PP; + } + if (PP.State == PathParser::PS_BeforeBegin) + result = __canonical("", ec); + if (ec) + ec->clear(); + if (DNEParts.empty()) + return result; + for (auto It = DNEParts.rbegin(); It != DNEParts.rend(); ++It) + result /= *It; + return result.lexically_normal(); +} + +/////////////////////////////////////////////////////////////////////////////// +// path definitions +/////////////////////////////////////////////////////////////////////////////// + +constexpr path::value_type path::preferred_separator; + +path& path::replace_extension(path const& replacement) { + path p = extension(); + if (not p.empty()) { + __pn_.erase(__pn_.size() - p.native().size()); + } + if (!replacement.empty()) { + if (replacement.native()[0] != '.') { + __pn_ += "."; + } + __pn_.append(replacement.__pn_); + } + return *this; +} + +/////////////////////////////////////////////////////////////////////////////// +// path.decompose + +string_view_t path::__root_name() const { + auto PP = PathParser::CreateBegin(__pn_); + if (PP.State == PathParser::PS_InRootName) + return *PP; + return {}; +} + +string_view_t path::__root_directory() const { + auto PP = PathParser::CreateBegin(__pn_); + if (PP.State == PathParser::PS_InRootName) + ++PP; + if (PP.State == PathParser::PS_InRootDir) + return *PP; + return {}; +} + +string_view_t path::__root_path_raw() const { + auto PP = PathParser::CreateBegin(__pn_); + if (PP.State == PathParser::PS_InRootName) { + auto NextCh = PP.peek(); + if (NextCh && *NextCh == '/') { + ++PP; + return createView(__pn_.data(), &PP.RawEntry.back()); + } + return PP.RawEntry; + } + if (PP.State == PathParser::PS_InRootDir) + return *PP; + return {}; +} + +static bool ConsumeRootName(PathParser *PP) { + static_assert(PathParser::PS_BeforeBegin == 1 && + PathParser::PS_InRootName == 2, + "Values for enums are incorrect"); + while (PP->State <= PathParser::PS_InRootName) + ++(*PP); + return PP->State == PathParser::PS_AtEnd; +} + +static bool ConsumeRootDir(PathParser* PP) { + static_assert(PathParser::PS_BeforeBegin == 1 && + PathParser::PS_InRootName == 2 && + PathParser::PS_InRootDir == 3, "Values for enums are incorrect"); + while (PP->State <= PathParser::PS_InRootDir) + ++(*PP); + return PP->State == PathParser::PS_AtEnd; +} + +string_view_t path::__relative_path() const { + auto PP = PathParser::CreateBegin(__pn_); + if (ConsumeRootDir(&PP)) + return {}; + return createView(PP.RawEntry.data(), &__pn_.back()); +} + +string_view_t path::__parent_path() const { + if (empty()) + return {}; + // Determine if we have a root path but not a relative path. In that case + // return *this. + { + auto PP = PathParser::CreateBegin(__pn_); + if (ConsumeRootDir(&PP)) + return __pn_; + } + // Otherwise remove a single element from the end of the path, and return + // a string representing that path + { + auto PP = PathParser::CreateEnd(__pn_); + --PP; + if (PP.RawEntry.data() == __pn_.data()) + return {}; + --PP; + return createView(__pn_.data(), &PP.RawEntry.back()); + } +} + +string_view_t path::__filename() const { + if (empty()) + return {}; + { + PathParser PP = PathParser::CreateBegin(__pn_); + if (ConsumeRootDir(&PP)) + return {}; + } + return *(--PathParser::CreateEnd(__pn_)); +} + +string_view_t path::__stem() const { + return parser::separate_filename(__filename()).first; +} + +string_view_t path::__extension() const { + return parser::separate_filename(__filename()).second; +} + +//////////////////////////////////////////////////////////////////////////// +// path.gen + +enum PathPartKind : unsigned char { + PK_None, + PK_RootSep, + PK_Filename, + PK_Dot, + PK_DotDot, + PK_TrailingSep +}; + +static PathPartKind ClassifyPathPart(string_view_t Part) { + if (Part.empty()) + return PK_TrailingSep; + if (Part == ".") + return PK_Dot; + if (Part == "..") + return PK_DotDot; + if (Part == "/") + return PK_RootSep; + return PK_Filename; +} + +path path::lexically_normal() const { + if (__pn_.empty()) + return *this; + + using PartKindPair = pair; + vector Parts; + // Guess as to how many elements the path has to avoid reallocating. + Parts.reserve(32); + + // Track the total size of the parts as we collect them. This allows the + // resulting path to reserve the correct amount of memory. + size_t NewPathSize = 0; + auto AddPart = [&](PathPartKind K, string_view_t P) { + NewPathSize += P.size(); + Parts.emplace_back(P, K); + }; + auto LastPartKind = [&]() { + if (Parts.empty()) + return PK_None; + return Parts.back().second; + }; + + bool MaybeNeedTrailingSep = false; + // Build a stack containing the remaining elements of the path, popping off + // elements which occur before a '..' entry. + for (auto PP = PathParser::CreateBegin(__pn_); PP; ++PP) { + auto Part = *PP; + PathPartKind Kind = ClassifyPathPart(Part); + switch (Kind) { + case PK_Filename: + case PK_RootSep: { + // Add all non-dot and non-dot-dot elements to the stack of elements. + AddPart(Kind, Part); + MaybeNeedTrailingSep = false; + break; + } + case PK_DotDot: { + // Only push a ".." element if there are no elements preceding the "..", + // or if the preceding element is itself "..". + auto LastKind = LastPartKind(); + if (LastKind == PK_Filename) { + NewPathSize -= Parts.back().first.size(); + Parts.pop_back(); + } else if (LastKind != PK_RootSep) + AddPart(PK_DotDot, ".."); + MaybeNeedTrailingSep = LastKind == PK_Filename; + break; + } + case PK_Dot: + case PK_TrailingSep: { + MaybeNeedTrailingSep = true; + break; + } + case PK_None: + _LIBCPP_UNREACHABLE(); + } + } + // [fs.path.generic]p6.8: If the path is empty, add a dot. + if (Parts.empty()) + return "."; + + // [fs.path.generic]p6.7: If the last filename is dot-dot, remove any + // trailing directory-separator. + bool NeedTrailingSep = MaybeNeedTrailingSep && LastPartKind() == PK_Filename; + + path Result; + Result.__pn_.reserve(Parts.size() + NewPathSize + NeedTrailingSep); + for (auto& PK : Parts) + Result /= PK.first; + + if (NeedTrailingSep) + Result /= ""; + + return Result; +} + +static int DetermineLexicalElementCount(PathParser PP) { + int Count = 0; + for (; PP; ++PP) { + auto Elem = *PP; + if (Elem == "..") + --Count; + else if (Elem != "." && Elem != "") + ++Count; + } + return Count; +} + +path path::lexically_relative(const path& base) const { + { // perform root-name/root-directory mismatch checks + auto PP = PathParser::CreateBegin(__pn_); + auto PPBase = PathParser::CreateBegin(base.__pn_); + auto CheckIterMismatchAtBase = [&]() { + return PP.State != PPBase.State && + (PP.inRootPath() || PPBase.inRootPath()); + }; + if (PP.inRootName() && PPBase.inRootName()) { + if (*PP != *PPBase) + return {}; + } else if (CheckIterMismatchAtBase()) + return {}; + + if (PP.inRootPath()) + ++PP; + if (PPBase.inRootPath()) + ++PPBase; + if (CheckIterMismatchAtBase()) + return {}; + } + + // Find the first mismatching element + auto PP = PathParser::CreateBegin(__pn_); + auto PPBase = PathParser::CreateBegin(base.__pn_); + while (PP && PPBase && PP.State == PPBase.State && *PP == *PPBase) { + ++PP; + ++PPBase; + } + + // If there is no mismatch, return ".". + if (!PP && !PPBase) + return "."; + + // Otherwise, determine the number of elements, 'n', which are not dot or + // dot-dot minus the number of dot-dot elements. + int ElemCount = DetermineLexicalElementCount(PPBase); + if (ElemCount < 0) + return {}; + + // if n == 0 and (a == end() || a->empty()), returns path("."); otherwise + if (ElemCount == 0 && (PP.atEnd() || *PP == "")) + return "."; + + // return a path constructed with 'n' dot-dot elements, followed by the + // elements of '*this' after the mismatch. + path Result; + // FIXME: Reserve enough room in Result that it won't have to re-allocate. + while (ElemCount--) + Result /= ".."; + for (; PP; ++PP) + Result /= *PP; + return Result; +} + +//////////////////////////////////////////////////////////////////////////// +// path.comparisons +static int CompareRootName(PathParser *LHS, PathParser *RHS) { + if (!LHS->inRootName() && !RHS->inRootName()) + return 0; + + auto GetRootName = [](PathParser *Parser) -> string_view_t { + return Parser->inRootName() ? **Parser : ""; + }; + int res = GetRootName(LHS).compare(GetRootName(RHS)); + ConsumeRootName(LHS); + ConsumeRootName(RHS); + return res; +} + +static int CompareRootDir(PathParser *LHS, PathParser *RHS) { + if (!LHS->inRootDir() && RHS->inRootDir()) + return -1; + else if (LHS->inRootDir() && !RHS->inRootDir()) + return 1; + else { + ConsumeRootDir(LHS); + ConsumeRootDir(RHS); + return 0; + } +} + +static int CompareRelative(PathParser *LHSPtr, PathParser *RHSPtr) { + auto &LHS = *LHSPtr; + auto &RHS = *RHSPtr; + + int res; + while (LHS && RHS) { + if ((res = (*LHS).compare(*RHS)) != 0) + return res; + ++LHS; + ++RHS; + } + return 0; +} + +static int CompareEndState(PathParser *LHS, PathParser *RHS) { + if (LHS->atEnd() && !RHS->atEnd()) + return -1; + else if (!LHS->atEnd() && RHS->atEnd()) + return 1; + return 0; +} + +int path::__compare(string_view_t __s) const { + auto LHS = PathParser::CreateBegin(__pn_); + auto RHS = PathParser::CreateBegin(__s); + int res; + + if ((res = CompareRootName(&LHS, &RHS)) != 0) + return res; + + if ((res = CompareRootDir(&LHS, &RHS)) != 0) + return res; + + if ((res = CompareRelative(&LHS, &RHS)) != 0) + return res; + + return CompareEndState(&LHS, &RHS); +} + +//////////////////////////////////////////////////////////////////////////// +// path.nonmembers +size_t hash_value(const path& __p) noexcept { + auto PP = PathParser::CreateBegin(__p.native()); + size_t hash_value = 0; + hash hasher; + while (PP) { + hash_value = __hash_combine(hash_value, hasher(*PP)); + ++PP; + } + return hash_value; +} + +//////////////////////////////////////////////////////////////////////////// +// path.itr +path::iterator path::begin() const { + auto PP = PathParser::CreateBegin(__pn_); + iterator it; + it.__path_ptr_ = this; + it.__state_ = static_cast(PP.State); + it.__entry_ = PP.RawEntry; + it.__stashed_elem_.__assign_view(*PP); + return it; +} + +path::iterator path::end() const { + iterator it{}; + it.__state_ = path::iterator::_AtEnd; + it.__path_ptr_ = this; + return it; +} + +path::iterator& path::iterator::__increment() { + PathParser PP(__path_ptr_->native(), __entry_, __state_); + ++PP; + __state_ = static_cast<_ParserState>(PP.State); + __entry_ = PP.RawEntry; + __stashed_elem_.__assign_view(*PP); + return *this; +} + +path::iterator& path::iterator::__decrement() { + PathParser PP(__path_ptr_->native(), __entry_, __state_); + --PP; + __state_ = static_cast<_ParserState>(PP.State); + __entry_ = PP.RawEntry; + __stashed_elem_.__assign_view(*PP); + return *this; +} + +/////////////////////////////////////////////////////////////////////////////// +// directory entry definitions +/////////////////////////////////////////////////////////////////////////////// + +#ifndef _LIBCPP_WIN32API +error_code directory_entry::__do_refresh() noexcept { + __data_.__reset(); + error_code failure_ec; + + StatT full_st; + file_status st = detail::posix_lstat(__p_, full_st, &failure_ec); + if (!status_known(st)) { + __data_.__reset(); + return failure_ec; + } + + if (!_VSTD_FS::exists(st) || !_VSTD_FS::is_symlink(st)) { + __data_.__cache_type_ = directory_entry::_RefreshNonSymlink; + __data_.__type_ = st.type(); + __data_.__non_sym_perms_ = st.permissions(); + } else { // we have a symlink + __data_.__sym_perms_ = st.permissions(); + // Get the information about the linked entity. + // Ignore errors from stat, since we don't want errors regarding symlink + // resolution to be reported to the user. + error_code ignored_ec; + st = detail::posix_stat(__p_, full_st, &ignored_ec); + + __data_.__type_ = st.type(); + __data_.__non_sym_perms_ = st.permissions(); + + // If we failed to resolve the link, then only partially populate the + // cache. + if (!status_known(st)) { + __data_.__cache_type_ = directory_entry::_RefreshSymlinkUnresolved; + return error_code{}; + } + // Otherwise, we resolved the link, potentially as not existing. + // That's OK. + __data_.__cache_type_ = directory_entry::_RefreshSymlink; + } + + if (_VSTD_FS::is_regular_file(st)) + __data_.__size_ = static_cast(full_st.st_size); + + if (_VSTD_FS::exists(st)) { + __data_.__nlink_ = static_cast(full_st.st_nlink); + + // Attempt to extract the mtime, and fail if it's not representable using + // file_time_type. For now we ignore the error, as we'll report it when + // the value is actually used. + error_code ignored_ec; + __data_.__write_time_ = + __extract_last_write_time(__p_, full_st, &ignored_ec); + } + + return failure_ec; +} +#else +error_code directory_entry::__do_refresh() noexcept { + __data_.__reset(); + error_code failure_ec; + + file_status st = _VSTD_FS::symlink_status(__p_, failure_ec); + if (!status_known(st)) { + __data_.__reset(); + return failure_ec; + } + + if (!_VSTD_FS::exists(st) || !_VSTD_FS::is_symlink(st)) { + __data_.__cache_type_ = directory_entry::_RefreshNonSymlink; + __data_.__type_ = st.type(); + __data_.__non_sym_perms_ = st.permissions(); + } else { // we have a symlink + __data_.__sym_perms_ = st.permissions(); + // Get the information about the linked entity. + // Ignore errors from stat, since we don't want errors regarding symlink + // resolution to be reported to the user. + error_code ignored_ec; + st = _VSTD_FS::status(__p_, ignored_ec); + + __data_.__type_ = st.type(); + __data_.__non_sym_perms_ = st.permissions(); + + // If we failed to resolve the link, then only partially populate the + // cache. + if (!status_known(st)) { + __data_.__cache_type_ = directory_entry::_RefreshSymlinkUnresolved; + return error_code{}; + } + __data_.__cache_type_ = directory_entry::_RefreshSymlink; + } + + // FIXME: This is currently broken, and the implementation only a placeholder. + // We need to cache last_write_time, file_size, and hard_link_count here before + // the implementation actually works. + + return failure_ec; +} +#endif + +#ifndef _LIBAUTO_UNDEF_VSTD_FS +#pragma pop_macro("_VSTD_FS") +#else +#undef _VSTD +#undef _LIBAUTO_UNDEF_VSTD_FS +#endif +} // namespace android::hardware::automotive::filesystem +/* clang-format on */