experimental/bits/fs_dir.h

// Filesystem directory utilities -*- C++ -*-

// Copyright (C) 2014-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

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

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

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

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

#ifndef _GLIBCXX_EXPERIMENTAL_FS_DIR_H
#define _GLIBCXX_EXPERIMENTAL_FS_DIR_H 1

#if __cplusplus < 201103L
# include <bits/c++0x_warning.h>
#else
# include <typeinfo>
# include <ext/concurrence.h>
# include <bits/unique_ptr.h>
# include <bits/shared_ptr.h>

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

namespace experimental
{
namespace filesystem
{
inline namespace v1
{
  /**
   * @addtogroup filesystem-ts
   * @{
   */

  class file_status
  {
  public:
    // constructors
    explicit
    file_status(file_type __ft = file_type::none,
                perms __prms = perms::unknown) noexcept
    : _M_type(__ft), _M_perms(__prms) { }

    file_status(const file_status&) noexcept = default;
    file_status(file_status&&) noexcept = default;
    ~file_status() = default;

    file_status& operator=(const file_status&) noexcept = default;
    file_status& operator=(file_status&&) noexcept = default;

    // observers
    file_type  type() const noexcept { return _M_type; }
    perms      permissions() const noexcept { return _M_perms; }

    // modifiers
    void       type(file_type __ft) noexcept { _M_type = __ft; }
    void       permissions(perms __prms) noexcept { _M_perms = __prms; }

  private:
    file_type   _M_type;
    perms       _M_perms;
  };

_GLIBCXX_BEGIN_NAMESPACE_CXX11

  class directory_entry
  {
  public:
    // constructors and destructor
    directory_entry() noexcept = default;
    directory_entry(const directory_entry&) = default;
    directory_entry(directory_entry&&) noexcept = default;
    explicit directory_entry(const filesystem::path& __p) : _M_path(__p) { }
    ~directory_entry() = default;

    // modifiers
    directory_entry& operator=(const directory_entry&) = default;
    directory_entry& operator=(directory_entry&&) noexcept = default;

    void assign(const filesystem::path& __p) { _M_path = __p; }

    void
    replace_filename(const filesystem::path& __p)
    { _M_path = _M_path.parent_path() / __p; }

    // observers
    const filesystem::path&  path() const noexcept { return _M_path; }
    operator const filesystem::path&() const noexcept { return _M_path; }

    file_status
    status() const
    { return filesystem::status(_M_path); }

    file_status
    status(error_code& __ec) const noexcept
    { return filesystem::status(_M_path, __ec); }

    file_status
    symlink_status() const
    { return filesystem::symlink_status(_M_path); }

    file_status
    symlink_status(error_code& __ec) const noexcept
    { return filesystem::symlink_status(_M_path, __ec); }

    bool
    operator< (const directory_entry& __rhs) const noexcept
    { return _M_path < __rhs._M_path; }

    bool
    operator==(const directory_entry& __rhs) const noexcept
    { return _M_path == __rhs._M_path; }

    bool
    operator!=(const directory_entry& __rhs) const noexcept
    { return _M_path != __rhs._M_path; }

    bool
    operator<=(const directory_entry& __rhs) const noexcept
    { return _M_path <= __rhs._M_path; }

    bool
    operator> (const directory_entry& __rhs) const noexcept
    { return _M_path > __rhs._M_path; }

    bool
    operator>=(const directory_entry& __rhs) const noexcept
    { return _M_path >= __rhs._M_path; }

  private:
    filesystem::path    _M_path;
  };

  struct _Dir;
  class directory_iterator;
  class recursive_directory_iterator;

  struct __directory_iterator_proxy
  {
    const directory_entry& operator*() const& noexcept { return _M_entry; }

    directory_entry operator*() && noexcept { return std::move(_M_entry); }

  private:
    friend class directory_iterator;
    friend class recursive_directory_iterator;

    explicit
    __directory_iterator_proxy(const directory_entry& __e) : _M_entry(__e) { }

    directory_entry _M_entry;
  };

  class directory_iterator
  {
  public:
    typedef directory_entry        value_type;
    typedef ptrdiff_t              difference_type;
    typedef const directory_entry* pointer;
    typedef const directory_entry& reference;
    typedef input_iterator_tag     iterator_category;

    directory_iterator() = default;

    explicit
    directory_iterator(const path& __p)
    : directory_iterator(__p, directory_options::none, nullptr) { }

    directory_iterator(const path& __p, directory_options __options)
    : directory_iterator(__p, __options, nullptr) { }

    directory_iterator(const path& __p, error_code& __ec) noexcept
    : directory_iterator(__p, directory_options::none, __ec) { }

    directory_iterator(const path& __p,
                       directory_options __options,
                       error_code& __ec) noexcept
    : directory_iterator(__p, __options, &__ec) { }

    directory_iterator(const directory_iterator& __rhs) = default;

    directory_iterator(directory_iterator&& __rhs) noexcept = default;

    ~directory_iterator() = default;

    directory_iterator&
    operator=(const directory_iterator& __rhs) = default;

    directory_iterator&
    operator=(directory_iterator&& __rhs) noexcept = default;

    const directory_entry& operator*() const;
    const directory_entry* operator->() const { return &**this; }
    directory_iterator&    operator++();
    directory_iterator&    increment(error_code& __ec) noexcept;

    __directory_iterator_proxy operator++(int)
    {
      __directory_iterator_proxy __pr{**this};
      ++*this;
      return __pr;
    }

  private:
    directory_iterator(const path&, directory_options, error_code*);

    friend bool
    operator==(const directory_iterator& __lhs,
               const directory_iterator& __rhs);

    friend class recursive_directory_iterator;

    std::shared_ptr<_Dir> _M_dir;
  };

  inline directory_iterator
  begin(directory_iterator __iter) noexcept
  { return __iter; }

  inline directory_iterator
  end(directory_iterator) noexcept
  { return directory_iterator(); }

  inline bool
  operator==(const directory_iterator& __lhs, const directory_iterator& __rhs)
  {
    return !__rhs._M_dir.owner_before(__lhs._M_dir)
      && !__lhs._M_dir.owner_before(__rhs._M_dir);
  }

  inline bool
  operator!=(const directory_iterator& __lhs, const directory_iterator& __rhs)
  { return !(__lhs == __rhs); }

  class recursive_directory_iterator
  {
  public:
    typedef directory_entry        value_type;
    typedef ptrdiff_t              difference_type;
    typedef const directory_entry* pointer;
    typedef const directory_entry& reference;
    typedef input_iterator_tag     iterator_category;

    recursive_directory_iterator() = default;

    explicit
    recursive_directory_iterator(const path& __p)
    : recursive_directory_iterator(__p, directory_options::none, nullptr) { }

    recursive_directory_iterator(const path& __p, directory_options __options)
    : recursive_directory_iterator(__p, __options, nullptr) { }

    recursive_directory_iterator(const path& __p,
                                 directory_options __options,
                                 error_code& __ec) noexcept
    : recursive_directory_iterator(__p, __options, &__ec) { }

    recursive_directory_iterator(const path& __p, error_code& __ec) noexcept
    : 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();

    // observers
    directory_options  options() const { return _M_options; }
    int                depth() const;
    bool               recursion_pending() const { return _M_pending; }

    const directory_entry& operator*() const;
    const directory_entry* operator->() const { return &**this; }

    // modifiers
    recursive_directory_iterator&
    operator=(const recursive_directory_iterator& __rhs) noexcept;
    recursive_directory_iterator&
    operator=(recursive_directory_iterator&& __rhs) noexcept;

    recursive_directory_iterator& operator++();
    recursive_directory_iterator& increment(error_code& __ec) noexcept;

    __directory_iterator_proxy operator++(int)
    {
      __directory_iterator_proxy __pr{**this};
      ++*this;
      return __pr;
    }

    void pop();
    void pop(error_code&);

    void disable_recursion_pending() { _M_pending = false; }

  private:
    recursive_directory_iterator(const path&, directory_options, error_code*);

    friend bool
    operator==(const recursive_directory_iterator& __lhs,
               const recursive_directory_iterator& __rhs);

    struct _Dir_stack;
    std::shared_ptr<_Dir_stack> _M_dirs;
    directory_options _M_options = {};
    bool _M_pending = false;
  };

  inline recursive_directory_iterator
  begin(recursive_directory_iterator __iter) noexcept
  { return __iter; }

  inline recursive_directory_iterator
  end(recursive_directory_iterator) noexcept
  { return recursive_directory_iterator(); }

  inline bool
  operator==(const recursive_directory_iterator& __lhs,
             const recursive_directory_iterator& __rhs)
  {
    return !__rhs._M_dirs.owner_before(__lhs._M_dirs)
      && !__lhs._M_dirs.owner_before(__rhs._M_dirs);
  }

  inline bool
  operator!=(const recursive_directory_iterator& __lhs,
             const recursive_directory_iterator& __rhs)
  { return !(__lhs == __rhs); }

_GLIBCXX_END_NAMESPACE_CXX11

  /// @} group filesystem-ts
} // namespace v1
} // namespace filesystem
} // namespace experimental

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#endif // C++11

#endif // _GLIBCXX_EXPERIMENTAL_FS_DIR_H
Revision:	1166
Committed:	Tue Oct 26 14:22:36 2021 UTC (4 years ago) by rossy
Content type:	text/x-chdr
File size:	10800 byte(s)
Log Message:	Daodan: Replace MinGW build env with an up-to-date MSYS2 env
#	Content
1	// Filesystem directory utilities -- C++ --
2
3	// Copyright (C) 2014-2021 Free Software Foundation, Inc.
4	//
5	// This file is part of the GNU ISO C++ Library. This library is free
6	// software; you can redistribute it and/or modify it under the
7	// terms of the GNU General Public License as published by the
8	// Free Software Foundation; either version 3, or (at your option)
9	// any later version.
10
11	// This library is distributed in the hope that it will be useful,
12	// but WITHOUT ANY WARRANTY; without even the implied warranty of
13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	// GNU General Public License for more details.
15
16	// Under Section 7 of GPL version 3, you are granted additional
17	// permissions described in the GCC Runtime Library Exception, version
18	// 3.1, as published by the Free Software Foundation.
19
20	// You should have received a copy of the GNU General Public License and
21	// a copy of the GCC Runtime Library Exception along with this program;
22	// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23	// <http://www.gnu.org/licenses/>.
24
25	/** @file experimental/bits/fs_dir.h
26	* This is an internal header file, included by other library headers.
27	* Do not attempt to use it directly. @headername{experimental/filesystem}
28	*/
29
30	#ifndef _GLIBCXX_EXPERIMENTAL_FS_DIR_H
31	#define _GLIBCXX_EXPERIMENTAL_FS_DIR_H 1
32
33	#if __cplusplus < 201103L
34	# include <bits/c++0x_warning.h>
35	#else
36	# include <typeinfo>
37	# include <ext/concurrence.h>
38	# include <bits/unique_ptr.h>
39	# include <bits/shared_ptr.h>
40
41	namespace std _GLIBCXX_VISIBILITY(default)
42	{
43	_GLIBCXX_BEGIN_NAMESPACE_VERSION
44
45	namespace experimental
46	{
47	namespace filesystem
48	{
49	inline namespace v1
50	{
51	/**
52	* @addtogroup filesystem-ts
53	* @{
54	*/
55
56	class file_status
57	{
58	public:
59	// constructors
60	explicit
61	file_status(file_type __ft = file_type::none,
62	perms __prms = perms::unknown) noexcept
63	: _M_type(__ft), _M_perms(__prms) { }
64
65	file_status(const file_status&) noexcept = default;
66	file_status(file_status&&) noexcept = default;
67	~file_status() = default;
68
69	file_status& operator=(const file_status&) noexcept = default;
70	file_status& operator=(file_status&&) noexcept = default;
71
72	// observers
73	file_type type() const noexcept { return _M_type; }
74	perms permissions() const noexcept { return _M_perms; }
75
76	// modifiers
77	void type(file_type __ft) noexcept { _M_type = __ft; }
78	void permissions(perms __prms) noexcept { _M_perms = __prms; }
79
80	private:
81	file_type _M_type;
82	perms _M_perms;
83	};
84
85	_GLIBCXX_BEGIN_NAMESPACE_CXX11
86
87	class directory_entry
88	{
89	public:
90	// constructors and destructor
91	directory_entry() noexcept = default;
92	directory_entry(const directory_entry&) = default;
93	directory_entry(directory_entry&&) noexcept = default;
94	explicit directory_entry(const filesystem::path& __p) : _M_path(__p) { }
95	~directory_entry() = default;
96
97	// modifiers
98	directory_entry& operator=(const directory_entry&) = default;
99	directory_entry& operator=(directory_entry&&) noexcept = default;
100
101	void assign(const filesystem::path& __p) { _M_path = __p; }
102
103	void
104	replace_filename(const filesystem::path& __p)
105	{ _M_path = _M_path.parent_path() / __p; }
106
107	// observers
108	const filesystem::path& path() const noexcept { return _M_path; }
109	operator const filesystem::path&() const noexcept { return _M_path; }
110
111	file_status
112	status() const
113	{ return filesystem::status(_M_path); }
114
115	file_status
116	status(error_code& __ec) const noexcept
117	{ return filesystem::status(_M_path, __ec); }
118
119	file_status
120	symlink_status() const
121	{ return filesystem::symlink_status(_M_path); }
122
123	file_status
124	symlink_status(error_code& __ec) const noexcept
125	{ return filesystem::symlink_status(_M_path, __ec); }
126
127	bool
128	operator< (const directory_entry& __rhs) const noexcept
129	{ return _M_path < __rhs._M_path; }
130
131	bool
132	operator==(const directory_entry& __rhs) const noexcept
133	{ return _M_path == __rhs._M_path; }
134
135	bool
136	operator!=(const directory_entry& __rhs) const noexcept
137	{ return _M_path != __rhs._M_path; }
138
139	bool
140	operator<=(const directory_entry& __rhs) const noexcept
141	{ return _M_path <= __rhs._M_path; }
142
143	bool
144	operator> (const directory_entry& __rhs) const noexcept
145	{ return _M_path > __rhs._M_path; }
146
147	bool
148	operator>=(const directory_entry& __rhs) const noexcept
149	{ return _M_path >= __rhs._M_path; }
150
151	private:
152	filesystem::path _M_path;
153	};
154
155	struct _Dir;
156	class directory_iterator;
157	class recursive_directory_iterator;
158
159	struct __directory_iterator_proxy
160	{
161	const directory_entry& operator*() const& noexcept { return _M_entry; }
162
163	directory_entry operator*() && noexcept { return std::move(_M_entry); }
164
165	private:
166	friend class directory_iterator;
167	friend class recursive_directory_iterator;
168
169	explicit
170	__directory_iterator_proxy(const directory_entry& __e) : _M_entry(__e) { }
171
172	directory_entry _M_entry;
173	};
174
175	class directory_iterator
176	{
177	public:
178	typedef directory_entry value_type;
179	typedef ptrdiff_t difference_type;
180	typedef const directory_entry* pointer;
181	typedef const directory_entry& reference;
182	typedef input_iterator_tag iterator_category;
183
184	directory_iterator() = default;
185
186	explicit
187	directory_iterator(const path& __p)
188	: directory_iterator(__p, directory_options::none, nullptr) { }
189
190	directory_iterator(const path& __p, directory_options __options)
191	: directory_iterator(__p, __options, nullptr) { }
192
193	directory_iterator(const path& __p, error_code& __ec) noexcept
194	: directory_iterator(__p, directory_options::none, __ec) { }
195
196	directory_iterator(const path& __p,
197	directory_options __options,
198	error_code& __ec) noexcept
199	: directory_iterator(__p, __options, &__ec) { }
200
201	directory_iterator(const directory_iterator& __rhs) = default;
202
203	directory_iterator(directory_iterator&& __rhs) noexcept = default;
204
205	~directory_iterator() = default;
206
207	directory_iterator&
208	operator=(const directory_iterator& __rhs) = default;
209
210	directory_iterator&
211	operator=(directory_iterator&& __rhs) noexcept = default;
212
213	const directory_entry& operator*() const;
214	const directory_entry* operator->() const { return &**this; }
215	directory_iterator& operator++();
216	directory_iterator& increment(error_code& __ec) noexcept;
217
218	__directory_iterator_proxy operator++(int)
219	{
220	__directory_iterator_proxy __pr{**this};
221	++*this;
222	return __pr;
223	}
224
225	private:
226	directory_iterator(const path&, directory_options, error_code*);
227
228	friend bool
229	operator==(const directory_iterator& __lhs,
230	const directory_iterator& __rhs);
231
232	friend class recursive_directory_iterator;
233
234	std::shared_ptr<_Dir> _M_dir;
235	};
236
237	inline directory_iterator
238	begin(directory_iterator __iter) noexcept
239	{ return __iter; }
240
241	inline directory_iterator
242	end(directory_iterator) noexcept
243	{ return directory_iterator(); }
244
245	inline bool
246	operator==(const directory_iterator& __lhs, const directory_iterator& __rhs)
247	{
248	return !__rhs._M_dir.owner_before(__lhs._M_dir)
249	&& !__lhs._M_dir.owner_before(__rhs._M_dir);
250	}
251
252	inline bool
253	operator!=(const directory_iterator& __lhs, const directory_iterator& __rhs)
254	{ return !(__lhs == __rhs); }
255
256	class recursive_directory_iterator
257	{
258	public:
259	typedef directory_entry value_type;
260	typedef ptrdiff_t difference_type;
261	typedef const directory_entry* pointer;
262	typedef const directory_entry& reference;
263	typedef input_iterator_tag iterator_category;
264
265	recursive_directory_iterator() = default;
266
267	explicit
268	recursive_directory_iterator(const path& __p)
269	: recursive_directory_iterator(__p, directory_options::none, nullptr) { }
270
271	recursive_directory_iterator(const path& __p, directory_options __options)
272	: recursive_directory_iterator(__p, __options, nullptr) { }
273
274	recursive_directory_iterator(const path& __p,
275	directory_options __options,
276	error_code& __ec) noexcept
277	: recursive_directory_iterator(__p, __options, &__ec) { }
278
279	recursive_directory_iterator(const path& __p, error_code& __ec) noexcept
280	: recursive_directory_iterator(__p, directory_options::none, &__ec) { }
281
282	recursive_directory_iterator(
283	const recursive_directory_iterator&) = default;
284
285	recursive_directory_iterator(recursive_directory_iterator&&) = default;
286
287	~recursive_directory_iterator();
288
289	// observers
290	directory_options options() const { return _M_options; }
291	int depth() const;
292	bool recursion_pending() const { return _M_pending; }
293
294	const directory_entry& operator*() const;
295	const directory_entry* operator->() const { return &**this; }
296
297	// modifiers
298	recursive_directory_iterator&
299	operator=(const recursive_directory_iterator& __rhs) noexcept;
300	recursive_directory_iterator&
301	operator=(recursive_directory_iterator&& __rhs) noexcept;
302
303	recursive_directory_iterator& operator++();
304	recursive_directory_iterator& increment(error_code& __ec) noexcept;
305
306	__directory_iterator_proxy operator++(int)
307	{
308	__directory_iterator_proxy __pr{**this};
309	++*this;
310	return __pr;
311	}
312
313	void pop();
314	void pop(error_code&);
315
316	void disable_recursion_pending() { _M_pending = false; }
317
318	private:
319	recursive_directory_iterator(const path&, directory_options, error_code*);
320
321	friend bool
322	operator==(const recursive_directory_iterator& __lhs,
323	const recursive_directory_iterator& __rhs);
324
325	struct _Dir_stack;
326	std::shared_ptr<_Dir_stack> _M_dirs;
327	directory_options _M_options = {};
328	bool _M_pending = false;
329	};
330
331	inline recursive_directory_iterator
332	begin(recursive_directory_iterator __iter) noexcept
333	{ return __iter; }
334
335	inline recursive_directory_iterator
336	end(recursive_directory_iterator) noexcept
337	{ return recursive_directory_iterator(); }
338
339	inline bool
340	operator==(const recursive_directory_iterator& __lhs,
341	const recursive_directory_iterator& __rhs)
342	{
343	return !__rhs._M_dirs.owner_before(__lhs._M_dirs)
344	&& !__lhs._M_dirs.owner_before(__rhs._M_dirs);
345	}
346
347	inline bool
348	operator!=(const recursive_directory_iterator& __lhs,
349	const recursive_directory_iterator& __rhs)
350	{ return !(__lhs == __rhs); }
351
352	_GLIBCXX_END_NAMESPACE_CXX11
353
354	/// @} group filesystem-ts
355	} // namespace v1
356	} // namespace filesystem
357	} // namespace experimental
358
359	_GLIBCXX_END_NAMESPACE_VERSION
360	} // namespace std
361
362	#endif // C++11
363
364	#endif // _GLIBCXX_EXPERIMENTAL_FS_DIR_H