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542 lines
15 KiB
C++
542 lines
15 KiB
C++
// Filesystem directory utilities -*- C++ -*-
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// Copyright (C) 2014-2019 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file include/bits/fs_dir.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{filesystem}
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*/
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#ifndef _GLIBCXX_FS_DIR_H
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#define _GLIBCXX_FS_DIR_H 1
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#if __cplusplus >= 201703L
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# include <typeinfo>
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# include <ext/concurrence.h>
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# include <bits/unique_ptr.h>
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# include <bits/shared_ptr.h>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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namespace filesystem
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{
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/**
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* @ingroup filesystem
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* @{
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*/
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class file_status
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{
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public:
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// constructors and destructor
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file_status() noexcept : file_status(file_type::none) {}
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explicit
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file_status(file_type __ft, perms __prms = perms::unknown) noexcept
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: _M_type(__ft), _M_perms(__prms) { }
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file_status(const file_status&) noexcept = default;
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file_status(file_status&&) noexcept = default;
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~file_status() = default;
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file_status& operator=(const file_status&) noexcept = default;
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file_status& operator=(file_status&&) noexcept = default;
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// observers
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file_type type() const noexcept { return _M_type; }
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perms permissions() const noexcept { return _M_perms; }
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// modifiers
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void type(file_type __ft) noexcept { _M_type = __ft; }
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void permissions(perms __prms) noexcept { _M_perms = __prms; }
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private:
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file_type _M_type;
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perms _M_perms;
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};
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_GLIBCXX_BEGIN_NAMESPACE_CXX11
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struct _Dir;
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class directory_iterator;
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class recursive_directory_iterator;
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class directory_entry
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{
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public:
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// constructors and destructor
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directory_entry() noexcept = default;
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directory_entry(const directory_entry&) = default;
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directory_entry(directory_entry&&) noexcept = default;
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explicit
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directory_entry(const filesystem::path& __p)
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: _M_path(__p)
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{ refresh(); }
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directory_entry(const filesystem::path& __p, error_code& __ec)
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: _M_path(__p)
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{
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refresh(__ec);
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if (__ec)
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_M_path.clear();
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}
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~directory_entry() = default;
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// modifiers
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directory_entry& operator=(const directory_entry&) = default;
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directory_entry& operator=(directory_entry&&) noexcept = default;
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void
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assign(const filesystem::path& __p)
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{
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_M_path = __p;
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refresh();
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}
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void
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assign(const filesystem::path& __p, error_code& __ec)
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{
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_M_path = __p;
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refresh(__ec);
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}
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void
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replace_filename(const filesystem::path& __p)
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{
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_M_path.replace_filename(__p);
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refresh();
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}
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void
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replace_filename(const filesystem::path& __p, error_code& __ec)
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{
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_M_path.replace_filename(__p);
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refresh(__ec);
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}
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void
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refresh()
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{ _M_type = symlink_status().type(); }
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void
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refresh(error_code& __ec) noexcept
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{ _M_type = symlink_status(__ec).type(); }
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// observers
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const filesystem::path& path() const noexcept { return _M_path; }
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operator const filesystem::path& () const noexcept { return _M_path; }
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bool
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exists() const
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{ return filesystem::exists(file_status{_M_file_type()}); }
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bool
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exists(error_code& __ec) const noexcept
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{ return filesystem::exists(file_status{_M_file_type(__ec)}); }
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bool
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is_block_file() const
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{ return _M_file_type() == file_type::block; }
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bool
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is_block_file(error_code& __ec) const noexcept
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{ return _M_file_type(__ec) == file_type::block; }
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bool
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is_character_file() const
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{ return _M_file_type() == file_type::character; }
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bool
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is_character_file(error_code& __ec) const noexcept
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{ return _M_file_type(__ec) == file_type::character; }
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bool
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is_directory() const
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{ return _M_file_type() == file_type::directory; }
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bool
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is_directory(error_code& __ec) const noexcept
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{ return _M_file_type(__ec) == file_type::directory; }
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bool
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is_fifo() const
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{ return _M_file_type() == file_type::fifo; }
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bool
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is_fifo(error_code& __ec) const noexcept
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{ return _M_file_type(__ec) == file_type::fifo; }
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bool
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is_other() const
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{ return filesystem::is_other(file_status{_M_file_type()}); }
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bool
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is_other(error_code& __ec) const noexcept
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{ return filesystem::is_other(file_status{_M_file_type(__ec)}); }
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bool
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is_regular_file() const
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{ return _M_file_type() == file_type::regular; }
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bool
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is_regular_file(error_code& __ec) const noexcept
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{ return _M_file_type(__ec) == file_type::regular; }
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bool
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is_socket() const
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{ return _M_file_type() == file_type::socket; }
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bool
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is_socket(error_code& __ec) const noexcept
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{ return _M_file_type(__ec) == file_type::socket; }
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bool
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is_symlink() const
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{
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if (_M_type != file_type::none)
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return _M_type == file_type::symlink;
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return symlink_status().type() == file_type::symlink;
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}
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bool
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is_symlink(error_code& __ec) const noexcept
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{
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if (_M_type != file_type::none)
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return _M_type == file_type::symlink;
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return symlink_status(__ec).type() == file_type::symlink;
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}
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uintmax_t
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file_size() const
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{ return filesystem::file_size(_M_path); }
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uintmax_t
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file_size(error_code& __ec) const noexcept
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{ return filesystem::file_size(_M_path, __ec); }
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uintmax_t
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hard_link_count() const
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{ return filesystem::hard_link_count(_M_path); }
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uintmax_t
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hard_link_count(error_code& __ec) const noexcept
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{ return filesystem::hard_link_count(_M_path, __ec); }
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file_time_type
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last_write_time() const
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{ return filesystem::last_write_time(_M_path); }
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file_time_type
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last_write_time(error_code& __ec) const noexcept
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{ return filesystem::last_write_time(_M_path, __ec); }
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file_status
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status() const
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{ return filesystem::status(_M_path); }
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file_status
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status(error_code& __ec) const noexcept
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{ return filesystem::status(_M_path, __ec); }
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file_status
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symlink_status() const
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{ return filesystem::symlink_status(_M_path); }
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file_status
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symlink_status(error_code& __ec) const noexcept
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{ return filesystem::symlink_status(_M_path, __ec); }
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bool
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operator< (const directory_entry& __rhs) const noexcept
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{ return _M_path < __rhs._M_path; }
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bool
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operator==(const directory_entry& __rhs) const noexcept
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{ return _M_path == __rhs._M_path; }
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bool
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operator!=(const directory_entry& __rhs) const noexcept
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{ return _M_path != __rhs._M_path; }
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bool
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operator<=(const directory_entry& __rhs) const noexcept
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{ return _M_path <= __rhs._M_path; }
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bool
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operator> (const directory_entry& __rhs) const noexcept
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{ return _M_path > __rhs._M_path; }
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bool
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operator>=(const directory_entry& __rhs) const noexcept
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{ return _M_path >= __rhs._M_path; }
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private:
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friend class _Dir;
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friend class directory_iterator;
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friend class recursive_directory_iterator;
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 3171. LWG 2989 breaks directory_entry stream insertion
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template<typename _CharT, typename _Traits>
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friend basic_ostream<_CharT, _Traits>&
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operator<<(basic_ostream<_CharT, _Traits>& __os,
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const directory_entry& __d)
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{ return __os << __d.path(); }
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directory_entry(const filesystem::path& __p, file_type __t)
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: _M_path(__p), _M_type(__t)
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{ }
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// Equivalent to status().type() but uses cached value, if any.
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file_type
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_M_file_type() const
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{
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if (_M_type != file_type::none && _M_type != file_type::symlink)
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return _M_type;
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return status().type();
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}
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// Equivalent to status(__ec).type() but uses cached value, if any.
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file_type
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_M_file_type(error_code& __ec) const noexcept
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{
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if (_M_type != file_type::none && _M_type != file_type::symlink)
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{
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__ec.clear();
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return _M_type;
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}
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return status(__ec).type();
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}
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filesystem::path _M_path;
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file_type _M_type = file_type::none;
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};
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struct __directory_iterator_proxy
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{
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const directory_entry& operator*() const& noexcept { return _M_entry; }
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directory_entry operator*() && noexcept { return std::move(_M_entry); }
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private:
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friend class directory_iterator;
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friend class recursive_directory_iterator;
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explicit
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__directory_iterator_proxy(const directory_entry& __e) : _M_entry(__e) { }
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directory_entry _M_entry;
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};
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class directory_iterator
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{
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public:
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typedef directory_entry value_type;
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typedef ptrdiff_t difference_type;
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typedef const directory_entry* pointer;
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typedef const directory_entry& reference;
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typedef input_iterator_tag iterator_category;
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directory_iterator() = default;
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explicit
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directory_iterator(const path& __p)
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: directory_iterator(__p, directory_options::none, nullptr) { }
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directory_iterator(const path& __p, directory_options __options)
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: directory_iterator(__p, __options, nullptr) { }
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directory_iterator(const path& __p, error_code& __ec)
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: directory_iterator(__p, directory_options::none, __ec) { }
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directory_iterator(const path& __p, directory_options __options,
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error_code& __ec)
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: directory_iterator(__p, __options, &__ec) { }
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directory_iterator(const directory_iterator& __rhs) = default;
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directory_iterator(directory_iterator&& __rhs) noexcept = default;
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~directory_iterator() = default;
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directory_iterator&
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operator=(const directory_iterator& __rhs) = default;
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directory_iterator&
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operator=(directory_iterator&& __rhs) noexcept = default;
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const directory_entry& operator*() const noexcept;
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const directory_entry* operator->() const noexcept { return &**this; }
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directory_iterator& operator++();
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directory_iterator& increment(error_code& __ec);
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__directory_iterator_proxy operator++(int)
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{
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__directory_iterator_proxy __pr{**this};
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++*this;
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return __pr;
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}
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private:
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directory_iterator(const path&, directory_options, error_code*);
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friend bool
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operator==(const directory_iterator& __lhs,
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const directory_iterator& __rhs) noexcept
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{
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return !__rhs._M_dir.owner_before(__lhs._M_dir)
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&& !__lhs._M_dir.owner_before(__rhs._M_dir);
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}
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friend bool
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operator!=(const directory_iterator& __lhs,
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const directory_iterator& __rhs) noexcept
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{ return !(__lhs == __rhs); }
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friend class recursive_directory_iterator;
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std::__shared_ptr<_Dir> _M_dir;
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};
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inline directory_iterator
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begin(directory_iterator __iter) noexcept
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{ return __iter; }
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inline directory_iterator
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end(directory_iterator) noexcept
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{ return directory_iterator(); }
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class recursive_directory_iterator
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{
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public:
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typedef directory_entry value_type;
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typedef ptrdiff_t difference_type;
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typedef const directory_entry* pointer;
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typedef const directory_entry& reference;
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typedef input_iterator_tag iterator_category;
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recursive_directory_iterator() = default;
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explicit
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recursive_directory_iterator(const path& __p)
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: recursive_directory_iterator(__p, directory_options::none, nullptr) { }
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recursive_directory_iterator(const path& __p, directory_options __options)
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: recursive_directory_iterator(__p, __options, nullptr) { }
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recursive_directory_iterator(const path& __p, directory_options __options,
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error_code& __ec)
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: recursive_directory_iterator(__p, __options, &__ec) { }
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recursive_directory_iterator(const path& __p, error_code& __ec)
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: recursive_directory_iterator(__p, directory_options::none, &__ec) { }
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recursive_directory_iterator(
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const recursive_directory_iterator&) = default;
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recursive_directory_iterator(recursive_directory_iterator&&) = default;
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~recursive_directory_iterator();
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// observers
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directory_options options() const noexcept;
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int depth() const noexcept;
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bool recursion_pending() const noexcept;
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const directory_entry& operator*() const noexcept;
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const directory_entry* operator->() const noexcept { return &**this; }
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// modifiers
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recursive_directory_iterator&
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operator=(const recursive_directory_iterator& __rhs) noexcept;
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recursive_directory_iterator&
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operator=(recursive_directory_iterator&& __rhs) noexcept;
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recursive_directory_iterator& operator++();
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recursive_directory_iterator& increment(error_code& __ec);
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__directory_iterator_proxy operator++(int)
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{
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__directory_iterator_proxy __pr{**this};
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++*this;
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return __pr;
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}
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void pop();
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void pop(error_code&);
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void disable_recursion_pending() noexcept;
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private:
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recursive_directory_iterator(const path&, directory_options, error_code*);
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friend bool
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operator==(const recursive_directory_iterator& __lhs,
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const recursive_directory_iterator& __rhs) noexcept
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{
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return !__rhs._M_dirs.owner_before(__lhs._M_dirs)
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&& !__lhs._M_dirs.owner_before(__rhs._M_dirs);
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}
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friend bool
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operator!=(const recursive_directory_iterator& __lhs,
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const recursive_directory_iterator& __rhs) noexcept
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{ return !(__lhs == __rhs); }
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struct _Dir_stack;
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std::__shared_ptr<_Dir_stack> _M_dirs;
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};
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inline recursive_directory_iterator
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begin(recursive_directory_iterator __iter) noexcept
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{ return __iter; }
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inline recursive_directory_iterator
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end(recursive_directory_iterator) noexcept
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{ return recursive_directory_iterator(); }
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_GLIBCXX_END_NAMESPACE_CXX11
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// @} group filesystem
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} // namespace filesystem
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// Use explicit instantiations of these types. Any inconsistency in the
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// value of __default_lock_policy between code including this header and
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// the library will cause a linker error.
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extern template class
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__shared_ptr<filesystem::_Dir>;
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extern template class
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__shared_ptr<filesystem::recursive_directory_iterator::_Dir_stack>;
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace std
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#endif // C++17
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#endif // _GLIBCXX_FS_DIR_H
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