libstdc++
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00001 // Filesystem directory utilities -*- C++ -*- 00002 00003 // Copyright (C) 2014-2015 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** @file experimental/fs_dir.h 00026 * This is an internal header file, included by other library headers. 00027 * Do not attempt to use it directly. @headername{experimental/filesystem} 00028 */ 00029 00030 #ifndef _GLIBCXX_EXPERIMENTAL_FS_DIR_H 00031 #define _GLIBCXX_EXPERIMENTAL_FS_DIR_H 1 00032 00033 #if __cplusplus < 201103L 00034 # include <bits/c++0x_warning.h> 00035 #else 00036 # include <typeinfo> 00037 # include <ext/concurrence.h> 00038 # include <bits/unique_ptr.h> 00039 # include <bits/shared_ptr.h> 00040 00041 namespace std _GLIBCXX_VISIBILITY(default) 00042 { 00043 namespace experimental 00044 { 00045 namespace filesystem 00046 { 00047 inline namespace v1 00048 { 00049 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00050 00051 /** 00052 * @ingroup filesystem 00053 * @{ 00054 */ 00055 00056 class file_status 00057 { 00058 public: 00059 // constructors 00060 explicit 00061 file_status(file_type __ft = file_type::none, 00062 perms __prms = perms::unknown) noexcept 00063 : _M_type(__ft), _M_perms(__prms) { } 00064 00065 file_status(const file_status&) noexcept = default; 00066 file_status(file_status&&) noexcept = default; 00067 ~file_status() = default; 00068 00069 file_status& operator=(const file_status&) noexcept = default; 00070 file_status& operator=(file_status&&) noexcept = default; 00071 00072 // observers 00073 file_type type() const noexcept { return _M_type; } 00074 perms permissions() const noexcept { return _M_perms; } 00075 00076 // modifiers 00077 void type(file_type __ft) noexcept { _M_type = __ft; } 00078 void permissions(perms __prms) noexcept { _M_perms = __prms; } 00079 00080 private: 00081 file_type _M_type; 00082 perms _M_perms; 00083 }; 00084 00085 _GLIBCXX_BEGIN_NAMESPACE_CXX11 00086 00087 class directory_entry 00088 { 00089 public: 00090 // constructors and destructor 00091 directory_entry() noexcept = default; 00092 directory_entry(const directory_entry&) = default; 00093 directory_entry(directory_entry&&) noexcept = default; 00094 explicit directory_entry(const filesystem::path& __p) : _M_path(__p) { } 00095 ~directory_entry() = default; 00096 00097 // modifiers 00098 directory_entry& operator=(const directory_entry&) = default; 00099 directory_entry& operator=(directory_entry&&) noexcept = default; 00100 00101 void assign(const filesystem::path& __p) { _M_path = __p; } 00102 00103 void 00104 replace_filename(const filesystem::path& __p) 00105 { _M_path = _M_path.parent_path() / __p; } 00106 00107 // observers 00108 const filesystem::path& path() const noexcept { return _M_path; } 00109 operator const filesystem::path&() const noexcept { return _M_path; } 00110 00111 file_status 00112 status() const 00113 { return filesystem::status(_M_path); } 00114 00115 file_status 00116 status(error_code& __ec) const noexcept 00117 { return filesystem::status(_M_path, __ec); } 00118 00119 file_status 00120 symlink_status() const 00121 { return filesystem::symlink_status(_M_path); } 00122 00123 file_status 00124 symlink_status(error_code& __ec) const noexcept 00125 { return filesystem::symlink_status(_M_path, __ec); } 00126 00127 bool 00128 operator< (const directory_entry& __rhs) const noexcept 00129 { return _M_path < __rhs._M_path; } 00130 00131 bool 00132 operator==(const directory_entry& __rhs) const noexcept 00133 { return _M_path == __rhs._M_path; } 00134 00135 bool 00136 operator!=(const directory_entry& __rhs) const noexcept 00137 { return _M_path != __rhs._M_path; } 00138 00139 bool 00140 operator<=(const directory_entry& __rhs) const noexcept 00141 { return _M_path <= __rhs._M_path; } 00142 00143 bool 00144 operator> (const directory_entry& __rhs) const noexcept 00145 { return _M_path > __rhs._M_path; } 00146 00147 bool 00148 operator>=(const directory_entry& __rhs) const noexcept 00149 { return _M_path >= __rhs._M_path; } 00150 00151 private: 00152 filesystem::path _M_path; 00153 }; 00154 00155 struct _Dir; 00156 class directory_iterator; 00157 class recursive_directory_iterator; 00158 00159 struct __directory_iterator_proxy 00160 { 00161 const directory_entry& operator*() const& noexcept { return _M_entry; } 00162 00163 directory_entry operator*() && noexcept { return std::move(_M_entry); } 00164 00165 private: 00166 friend class directory_iterator; 00167 friend class recursive_directory_iterator; 00168 00169 explicit 00170 __directory_iterator_proxy(const directory_entry& __e) : _M_entry(__e) { } 00171 00172 directory_entry _M_entry; 00173 }; 00174 00175 class directory_iterator 00176 { 00177 public: 00178 typedef directory_entry value_type; 00179 typedef ptrdiff_t difference_type; 00180 typedef const directory_entry* pointer; 00181 typedef const directory_entry& reference; 00182 typedef input_iterator_tag iterator_category; 00183 00184 directory_iterator() noexcept = default; 00185 00186 explicit 00187 directory_iterator(const path& __p) 00188 : directory_iterator(__p, directory_options::none, nullptr) { } 00189 00190 directory_iterator(const path& __p, directory_options __options) 00191 : directory_iterator(__p, __options, nullptr) { } 00192 00193 directory_iterator(const path& __p, error_code& __ec) noexcept 00194 : directory_iterator(__p, directory_options::none, __ec) { } 00195 00196 directory_iterator(const path& __p, 00197 directory_options __options, 00198 error_code& __ec) noexcept 00199 : directory_iterator(__p, __options, &__ec) { } 00200 00201 directory_iterator(const directory_iterator& __rhs) = default; 00202 00203 directory_iterator(directory_iterator&& __rhs) noexcept = default; 00204 00205 ~directory_iterator() = default; 00206 00207 directory_iterator& 00208 operator=(const directory_iterator& __rhs) = default; 00209 00210 directory_iterator& 00211 operator=(directory_iterator&& __rhs) noexcept = default; 00212 00213 const directory_entry& operator*() const; 00214 const directory_entry* operator->() const { return &**this; } 00215 directory_iterator& operator++(); 00216 directory_iterator& increment(error_code& __ec) noexcept; 00217 00218 __directory_iterator_proxy operator++(int) 00219 { 00220 __directory_iterator_proxy __pr{**this}; 00221 ++*this; 00222 return __pr; 00223 } 00224 00225 private: 00226 directory_iterator(const path&, directory_options, error_code*); 00227 00228 friend bool 00229 operator==(const directory_iterator& __lhs, 00230 const directory_iterator& __rhs); 00231 00232 friend class recursive_directory_iterator; 00233 00234 std::shared_ptr<_Dir> _M_dir; 00235 }; 00236 00237 inline directory_iterator 00238 begin(directory_iterator __iter) noexcept 00239 { return __iter; } 00240 00241 inline directory_iterator 00242 end(directory_iterator) noexcept 00243 { return directory_iterator(); } 00244 00245 inline bool 00246 operator==(const directory_iterator& __lhs, const directory_iterator& __rhs) 00247 { 00248 return !__rhs._M_dir.owner_before(__lhs._M_dir) 00249 && !__lhs._M_dir.owner_before(__rhs._M_dir); 00250 } 00251 00252 inline bool 00253 operator!=(const directory_iterator& __lhs, const directory_iterator& __rhs) 00254 { return !(__lhs == __rhs); } 00255 00256 class recursive_directory_iterator 00257 { 00258 public: 00259 typedef directory_entry value_type; 00260 typedef ptrdiff_t difference_type; 00261 typedef const directory_entry* pointer; 00262 typedef const directory_entry& reference; 00263 typedef input_iterator_tag iterator_category; 00264 00265 recursive_directory_iterator() noexcept = default; 00266 00267 explicit 00268 recursive_directory_iterator(const path& __p) 00269 : recursive_directory_iterator(__p, directory_options::none, nullptr) { } 00270 00271 recursive_directory_iterator(const path& __p, directory_options __options) 00272 : recursive_directory_iterator(__p, __options, nullptr) { } 00273 00274 recursive_directory_iterator(const path& __p, 00275 directory_options __options, 00276 error_code& __ec) noexcept 00277 : recursive_directory_iterator(__p, __options, &__ec) { } 00278 00279 recursive_directory_iterator(const path& __p, error_code& __ec) noexcept 00280 : recursive_directory_iterator(__p, directory_options::none, &__ec) { } 00281 00282 recursive_directory_iterator( 00283 const recursive_directory_iterator&) = default; 00284 00285 recursive_directory_iterator( 00286 recursive_directory_iterator&&) noexcept = default; 00287 00288 ~recursive_directory_iterator(); 00289 00290 // observers 00291 directory_options options() const { return _M_options; } 00292 int depth() const; 00293 bool recursion_pending() const { return _M_pending; } 00294 00295 const directory_entry& operator*() const; 00296 const directory_entry* operator->() const { return &**this; } 00297 00298 // modifiers 00299 recursive_directory_iterator& 00300 operator=(const recursive_directory_iterator& __rhs) noexcept; 00301 recursive_directory_iterator& 00302 operator=(recursive_directory_iterator&& __rhs) noexcept; 00303 00304 recursive_directory_iterator& operator++(); 00305 recursive_directory_iterator& increment(error_code& __ec) noexcept; 00306 00307 __directory_iterator_proxy operator++(int) 00308 { 00309 __directory_iterator_proxy __pr{**this}; 00310 ++*this; 00311 return __pr; 00312 } 00313 00314 void pop(); 00315 00316 void disable_recursion_pending() { _M_pending = false; } 00317 00318 private: 00319 recursive_directory_iterator(const path&, directory_options, error_code*); 00320 00321 friend bool 00322 operator==(const recursive_directory_iterator& __lhs, 00323 const recursive_directory_iterator& __rhs); 00324 00325 struct _Dir_stack; 00326 std::shared_ptr<_Dir_stack> _M_dirs; 00327 directory_options _M_options = {}; 00328 bool _M_pending = false; 00329 }; 00330 00331 inline recursive_directory_iterator 00332 begin(recursive_directory_iterator __iter) noexcept 00333 { return __iter; } 00334 00335 inline recursive_directory_iterator 00336 end(recursive_directory_iterator) noexcept 00337 { return recursive_directory_iterator(); } 00338 00339 inline bool 00340 operator==(const recursive_directory_iterator& __lhs, 00341 const recursive_directory_iterator& __rhs) 00342 { 00343 return !__rhs._M_dirs.owner_before(__lhs._M_dirs) 00344 && !__lhs._M_dirs.owner_before(__rhs._M_dirs); 00345 } 00346 00347 inline bool 00348 operator!=(const recursive_directory_iterator& __lhs, 00349 const recursive_directory_iterator& __rhs) 00350 { return !(__lhs == __rhs); } 00351 00352 _GLIBCXX_END_NAMESPACE_CXX11 00353 00354 // @} group filesystem 00355 _GLIBCXX_END_NAMESPACE_VERSION 00356 } // namespace v1 00357 } // namespace filesystem 00358 } // namespace experimental 00359 } // namespace std 00360 00361 #endif // C++11 00362 00363 #endif // _GLIBCXX_EXPERIMENTAL_FS_DIR_H