FM / bits

/usr/include/c++/9/bits

Name	Size	Mode	Actions
algorithmfwd.h	21737	0644	edit dl rm
allocated_ptr.h	3293	0644	edit dl rm
allocator.h	7942	0644	edit dl rm
alloc_traits.h	21481	0644	edit dl rm
atomic_base.h	24993	0644	edit dl rm
atomic_futex.h	9499	0644	edit dl rm
atomic_lockfree_defines.h	2353	0644	edit dl rm
basic_ios.h	16080	0644	edit dl rm
basic_ios.tcc	6083	0644	edit dl rm
basic_string.h	247075	0644	edit dl rm
basic_string.tcc	53891	0644	edit dl rm
boost_concept_check.h	27161	0644	edit dl rm
c++0x_warning.h	1474	0644	edit dl rm
char_traits.h	24828	0644	edit dl rm
codecvt.h	25429	0644	edit dl rm
concept_check.h	3423	0644	edit dl rm
cpp_type_traits.h	9947	0644	edit dl rm
cxxabi_forced.h	1811	0644	edit dl rm
cxxabi_init_exception.h	2220	0644	edit dl rm
deque.tcc	34404	0644	edit dl rm
enable_special_members.h	12387	0644	edit dl rm
erase_if.h	2037	0644	edit dl rm
exception.h	2486	0644	edit dl rm
exception_defines.h	1645	0644	edit dl rm
exception_ptr.h	5982	0644	edit dl rm
forward_list.h	49405	0644	edit dl rm
forward_list.tcc	13871	0644	edit dl rm
fstream.tcc	33663	0644	edit dl rm
fs_dir.h	15168	0644	edit dl rm
fs_fwd.h	11687	0644	edit dl rm
fs_ops.h	9731	0644	edit dl rm
fs_path.h	36954	0644	edit dl rm
functexcept.h	3433	0644	edit dl rm
functional_hash.h	8568	0644	edit dl rm
gslice.h	5519	0644	edit dl rm
gslice_array.h	7852	0644	edit dl rm
hashtable.h	74814	0644	edit dl rm
hashtable_policy.h	68109	0644	edit dl rm
hash_bytes.h	2146	0644	edit dl rm
indirect_array.h	7862	0644	edit dl rm
invoke.h	3657	0644	edit dl rm
ios_base.h	31434	0644	edit dl rm
istream.tcc	31093	0644	edit dl rm
list.tcc	16968	0644	edit dl rm
localefwd.h	5941	0644	edit dl rm
locale_classes.h	24903	0644	edit dl rm
locale_classes.tcc	8375	0644	edit dl rm
locale_conv.h	18801	0644	edit dl rm
locale_facets.h	92339	0644	edit dl rm
locale_facets.tcc	39548	0644	edit dl rm
locale_facets_nonio.h	68994	0644	edit dl rm
locale_facets_nonio.tcc	45280	0644	edit dl rm
mask_array.h	7676	0644	edit dl rm
memoryfwd.h	2453	0644	edit dl rm
move.h	6529	0644	edit dl rm
nested_exception.h	4803	0644	edit dl rm
node_handle.h	8216	0644	edit dl rm
ostream.tcc	12315	0644	edit dl rm
ostream_insert.h	4002	0644	edit dl rm
parse_numbers.h	7944	0644	edit dl rm
postypes.h	8465	0644	edit dl rm
predefined_ops.h	9083	0644	edit dl rm
ptr_traits.h	6728	0644	edit dl rm
quoted_string.h	5053	0644	edit dl rm
random.h	178041	0644	edit dl rm
random.tcc	105619	0644	edit dl rm
range_access.h	10084	0644	edit dl rm
refwrap.h	12927	0644	edit dl rm
regex.h	98707	0644	edit dl rm
regex.tcc	16574	0644	edit dl rm
regex_automaton.h	10739	0644	edit dl rm
regex_automaton.tcc	7722	0644	edit dl rm
regex_compiler.h	16482	0644	edit dl rm
regex_compiler.tcc	18929	0644	edit dl rm
regex_constants.h	14707	0644	edit dl rm
regex_error.h	4907	0644	edit dl rm
regex_executor.h	7489	0644	edit dl rm
regex_executor.tcc	18841	0644	edit dl rm
regex_scanner.h	7089	0644	edit dl rm
regex_scanner.tcc	15009	0644	edit dl rm
shared_ptr.h	24221	0644	edit dl rm
shared_ptr_atomic.h	9775	0644	edit dl rm
shared_ptr_base.h	53771	0644	edit dl rm
slice_array.h	9430	0644	edit dl rm
specfun.h	47052	0644	edit dl rm
sstream.tcc	10142	0644	edit dl rm
std_abs.h	3384	0644	edit dl rm
std_function.h	23566	0644	edit dl rm
std_mutex.h	4768	0644	edit dl rm
stl_algo.h	215416	0644	edit dl rm
stl_algobase.h	51417	0644	edit dl rm
stl_bvector.h	33888	0644	edit dl rm
stl_construct.h	7397	0644	edit dl rm
stl_deque.h	80116	0644	edit dl rm
stl_function.h	42293	0644	edit dl rm
stl_heap.h	20206	0644	edit dl rm
stl_iterator.h	42755	0644	edit dl rm
stl_iterator_base_funcs.h	8178	0644	edit dl rm
stl_iterator_base_types.h	8682	0644	edit dl rm
stl_list.h	67809	0644	edit dl rm
stl_map.h	53495	0644	edit dl rm
stl_multimap.h	42240	0644	edit dl rm
stl_multiset.h	36486	0644	edit dl rm
stl_numeric.h	14376	0644	edit dl rm
stl_pair.h	18642	0644	edit dl rm
stl_queue.h	24580	0644	edit dl rm
stl_raw_storage_iter.h	3830	0644	edit dl rm
stl_relops.h	4594	0644	edit dl rm
stl_set.h	36790	0644	edit dl rm
stl_stack.h	12228	0644	edit dl rm
stl_tempbuf.h	8287	0644	edit dl rm
stl_tree.h	75018	0644	edit dl rm
stl_uninitialized.h	31455	0644	edit dl rm
stl_vector.h	64968	0644	edit dl rm
streambuf.tcc	4929	0644	edit dl rm
streambuf_iterator.h	13889	0644	edit dl rm
stream_iterator.h	6867	0644	edit dl rm
stringfwd.h	2690	0644	edit dl rm
string_view.tcc	6698	0644	edit dl rm
uniform_int_dist.h	10248	0644	edit dl rm
unique_lock.h	6102	0644	edit dl rm
unique_ptr.h	27564	0644	edit dl rm
unordered_map.h	76884	0644	edit dl rm
unordered_set.h	60677	0644	edit dl rm
uses_allocator.h	6824	0644	edit dl rm
valarray_after.h	22839	0644	edit dl rm
valarray_array.h	21295	0644	edit dl rm
valarray_array.tcc	7254	0644	edit dl rm
valarray_before.h	19142	0644	edit dl rm
vector.tcc	30870	0644	edit dl rm

Edit: /usr/include/c++/9/bits/fs_fwd.h (11687B)

// Filesystem declarations -*- C++ -*-

// Copyright (C) 2014-2019 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file include/bits/fs_fwd.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{filesystem}
 */

#ifndef _GLIBCXX_FS_FWD_H
#define _GLIBCXX_FS_FWD_H 1

#if __cplusplus >= 201703L

#include <system_error>
#include <cstdint>
#include <chrono>

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

namespace filesystem
{
#if _GLIBCXX_USE_CXX11_ABI
inline namespace __cxx11 __attribute__((__abi_tag__ ("cxx11"))) { }
#endif

/**
   * @defgroup filesystem Filesystem
   *
   * Utilities for performing operations on file systems and their components,
   * such as paths, regular files, and directories.
   *
   * @{
   */

class file_status;
_GLIBCXX_BEGIN_NAMESPACE_CXX11
  class path;
  class filesystem_error;
  class directory_entry;
  class directory_iterator;
  class recursive_directory_iterator;
_GLIBCXX_END_NAMESPACE_CXX11

struct space_info
  {
    uintmax_t capacity;
    uintmax_t free;
    uintmax_t available;
  };

enum class 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
  };

/// Bitmask type
  enum class 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
  };

constexpr copy_options
  operator&(copy_options __x, copy_options __y) noexcept
  {
    using __utype = typename std::underlying_type<copy_options>::type;
    return static_cast<copy_options>(
	static_cast<__utype>(__x) & static_cast<__utype>(__y));
  }

constexpr copy_options
  operator|(copy_options __x, copy_options __y) noexcept
  {
    using __utype = typename std::underlying_type<copy_options>::type;
    return static_cast<copy_options>(
	static_cast<__utype>(__x) | static_cast<__utype>(__y));
  }

constexpr copy_options
  operator^(copy_options __x, copy_options __y) noexcept
  {
    using __utype = typename std::underlying_type<copy_options>::type;
    return static_cast<copy_options>(
	static_cast<__utype>(__x) ^ static_cast<__utype>(__y));
  }

constexpr copy_options
  operator~(copy_options __x) noexcept
  {
    using __utype = typename std::underlying_type<copy_options>::type;
    return static_cast<copy_options>(~static_cast<__utype>(__x));
  }

inline copy_options&
  operator&=(copy_options& __x, copy_options __y) noexcept
  { return __x = __x & __y; }

inline copy_options&
  operator|=(copy_options& __x, copy_options __y) noexcept
  { return __x = __x | __y; }

inline copy_options&
  operator^=(copy_options& __x, copy_options __y) noexcept
  { return __x = __x ^ __y; }

/// Bitmask type
  enum class 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,
  };

constexpr perms
  operator&(perms __x, perms __y) noexcept
  {
    using __utype = typename std::underlying_type<perms>::type;
    return static_cast<perms>(
	static_cast<__utype>(__x) & static_cast<__utype>(__y));
  }

constexpr perms
  operator|(perms __x, perms __y) noexcept
  {
    using __utype = typename std::underlying_type<perms>::type;
    return static_cast<perms>(
	static_cast<__utype>(__x) | static_cast<__utype>(__y));
  }

constexpr perms
  operator^(perms __x, perms __y) noexcept
  {
    using __utype = typename std::underlying_type<perms>::type;
    return static_cast<perms>(
	static_cast<__utype>(__x) ^ static_cast<__utype>(__y));
  }

constexpr perms
  operator~(perms __x) noexcept
  {
    using __utype = typename std::underlying_type<perms>::type;
    return static_cast<perms>(~static_cast<__utype>(__x));
  }

inline perms&
  operator&=(perms& __x, perms __y) noexcept
  { return __x = __x & __y; }

inline perms&
  operator|=(perms& __x, perms __y) noexcept
  { return __x = __x | __y; }

inline perms&
  operator^=(perms& __x, perms __y) noexcept
  { return __x = __x ^ __y; }

/// Bitmask type
  enum class perm_options : unsigned {
      replace	= 0x1,
      add	= 0x2,
      remove	= 0x4,
      nofollow	= 0x8
  };

constexpr perm_options
  operator&(perm_options __x, perm_options __y) noexcept
  {
    using __utype = typename std::underlying_type<perm_options>::type;
    return static_cast<perm_options>(
	static_cast<__utype>(__x) & static_cast<__utype>(__y));
  }

constexpr perm_options
  operator|(perm_options __x, perm_options __y) noexcept
  {
    using __utype = typename std::underlying_type<perm_options>::type;
    return static_cast<perm_options>(
	static_cast<__utype>(__x) | static_cast<__utype>(__y));
  }

constexpr perm_options
  operator^(perm_options __x, perm_options __y) noexcept
  {
    using __utype = typename std::underlying_type<perm_options>::type;
    return static_cast<perm_options>(
	static_cast<__utype>(__x) ^ static_cast<__utype>(__y));
  }

constexpr perm_options
  operator~(perm_options __x) noexcept
  {
    using __utype = typename std::underlying_type<perm_options>::type;
    return static_cast<perm_options>(~static_cast<__utype>(__x));
  }

inline perm_options&
  operator&=(perm_options& __x, perm_options __y) noexcept
  { return __x = __x & __y; }

inline perm_options&
  operator|=(perm_options& __x, perm_options __y) noexcept
  { return __x = __x | __y; }

inline perm_options&
  operator^=(perm_options& __x, perm_options __y) noexcept
  { return __x = __x ^ __y; }

// Bitmask type
  enum class directory_options : unsigned char {
      none = 0, follow_directory_symlink = 1, skip_permission_denied = 2
  };

constexpr directory_options
  operator&(directory_options __x, directory_options __y) noexcept
  {
    using __utype = typename std::underlying_type<directory_options>::type;
    return static_cast<directory_options>(
	static_cast<__utype>(__x) & static_cast<__utype>(__y));
  }

constexpr directory_options
  operator|(directory_options __x, directory_options __y) noexcept
  {
    using __utype = typename std::underlying_type<directory_options>::type;
    return static_cast<directory_options>(
	static_cast<__utype>(__x) | static_cast<__utype>(__y));
  }

constexpr directory_options
  operator^(directory_options __x, directory_options __y) noexcept
  {
    using __utype = typename std::underlying_type<directory_options>::type;
    return static_cast<directory_options>(
	static_cast<__utype>(__x) ^ static_cast<__utype>(__y));
  }

constexpr directory_options
  operator~(directory_options __x) noexcept
  {
    using __utype = typename std::underlying_type<directory_options>::type;
    return static_cast<directory_options>(~static_cast<__utype>(__x));
  }

inline directory_options&
  operator&=(directory_options& __x, directory_options __y) noexcept
  { return __x = __x & __y; }

inline directory_options&
  operator|=(directory_options& __x, directory_options __y) noexcept
  { return __x = __x | __y; }

inline directory_options&
  operator^=(directory_options& __x, directory_options __y) noexcept
  { return __x = __x ^ __y; }

struct __file_clock
  {
    using duration                  = chrono::nanoseconds;
    using rep                       = duration::rep;
    using period                    = duration::period;
    using time_point                = chrono::time_point<__file_clock>;
    static constexpr bool is_steady = false;

static time_point
    now() noexcept
    { return _S_from_sys(chrono::system_clock::now()); }

private:
    using __sys_clock = chrono::system_clock;

// This clock's (unspecified) epoch is 2174-01-01 00:00:00 UTC.
    // A signed 64-bit duration with nanosecond resolution gives roughly
    // +/- 292 years, which covers the 1901-2446 date range for ext4.
    static constexpr chrono::seconds _S_epoch_diff{6437664000};

protected:
    // For internal use only
    template<typename _Dur>
      static
      chrono::time_point<__file_clock, _Dur>
      _S_from_sys(const chrono::time_point<__sys_clock, _Dur>& __t) noexcept
      {
	using __file_time = chrono::time_point<__file_clock, _Dur>;
	return __file_time{__t.time_since_epoch()} - _S_epoch_diff;
      }

// For internal use only
    template<typename _Dur>
      static
      chrono::time_point<__sys_clock, _Dur>
      _S_to_sys(const chrono::time_point<__file_clock, _Dur>& __t) noexcept
      {
	using __sys_time = chrono::time_point<__sys_clock, _Dur>;
	return __sys_time{__t.time_since_epoch()} + _S_epoch_diff;
      }
  };

using file_time_type = __file_clock::time_point;

// operational functions

void copy(const path& __from, const path& __to, copy_options __options);
  void copy(const path& __from, const path& __to, copy_options __options,
	    error_code&);

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&);

path current_path();

bool exists(file_status) noexcept;

bool is_other(file_status) noexcept;

uintmax_t file_size(const path&);
  uintmax_t file_size(const path&, error_code&) noexcept;
  uintmax_t hard_link_count(const path&);
  uintmax_t hard_link_count(const path&, error_code&) noexcept;
  file_time_type last_write_time(const path&);
  file_time_type last_write_time(const path&, error_code&) noexcept;

void permissions(const path&, perms, perm_options, error_code&) noexcept;

path proximate(const path& __p, const path& __base, error_code& __ec);
  path proximate(const path& __p, const path& __base, error_code& __ec);

path relative(const path& __p, const path& __base, error_code& __ec);

file_status status(const path&);
  file_status status(const path&, error_code&) noexcept;

bool status_known(file_status) noexcept;

file_status symlink_status(const path&);
  file_status symlink_status(const path&, error_code&) noexcept;

bool is_regular_file(file_status) noexcept;
  bool is_symlink(file_status) noexcept;

/// @} group filesystem
} // namespace filesystem

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#endif // C++17

#endif // _GLIBCXX_FS_FWD_H

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