1// boost/filesystem/operations.hpp ---------------------------------------------------//
2
3// Copyright Beman Dawes 2002-2009
4// Copyright Jan Langer 2002
5// Copyright Dietmar Kuehl 2001
6// Copyright Vladimir Prus 2002
7
8// Distributed under the Boost Software License, Version 1.0.
9// See http://www.boost.org/LICENSE_1_0.txt
10
11// Library home page: http://www.boost.org/libs/filesystem
12
13//--------------------------------------------------------------------------------------//
14
15#ifndef BOOST_FILESYSTEM3_OPERATIONS_HPP
16#define BOOST_FILESYSTEM3_OPERATIONS_HPP
17
18#include <boost/config.hpp>
19
20# if defined( BOOST_NO_STD_WSTRING )
21# error Configuration not supported: Boost.Filesystem V3 and later requires std::wstring support
22# endif
23
24#include <boost/filesystem/config.hpp>
25#include <boost/filesystem/path.hpp>
26
27#include <boost/detail/scoped_enum_emulation.hpp>
28#include <boost/detail/bitmask.hpp>
29#include <boost/system/error_code.hpp>
30#include <boost/system/system_error.hpp>
31#include <boost/shared_ptr.hpp>
32#include <boost/utility/enable_if.hpp>
33#include <boost/type_traits/is_same.hpp>
34#include <boost/cstdint.hpp>
35#include <boost/range/mutable_iterator.hpp>
36#include <boost/range/const_iterator.hpp>
37#include <boost/assert.hpp>
38#include <string>
39#include <utility> // for pair
40#include <ctime>
41#include <vector>
42#include <stack>
43
44#ifdef BOOST_WINDOWS_API
45# include <fstream>
46#endif
47
48#include <boost/config/abi_prefix.hpp> // must be the last #include
49
50//--------------------------------------------------------------------------------------//
51
52namespace boost
53{
54 namespace filesystem
55 {
56
57 //--------------------------------------------------------------------------------------//
58 // //
59 // class filesystem_error //
60 // //
61 //--------------------------------------------------------------------------------------//
62
63 class BOOST_SYMBOL_VISIBLE filesystem_error : public system::system_error
64 {
65 // see http://www.boost.org/more/error_handling.html for design rationale
66
67 // all functions are inline to avoid issues with crossing dll boundaries
68
69 // functions previously throw() are now BOOST_NOEXCEPT_OR_NOTHROW
70 // functions previously without throw() are now BOOST_NOEXCEPT
71
72 public:
73 // compiler generates copy constructor and copy assignment
74
75 filesystem_error(
76 const std::string & what_arg, system::error_code ec) BOOST_NOEXCEPT
77 : system::system_error(ec, what_arg)
78 {
79 try
80 {
81 m_imp_ptr.reset(new m_imp);
82 }
83 catch (...) { m_imp_ptr.reset(); }
84 }
85
86 filesystem_error(
87 const std::string & what_arg, const path& path1_arg,
88 system::error_code ec) BOOST_NOEXCEPT
89 : system::system_error(ec, what_arg)
90 {
91 try
92 {
93 m_imp_ptr.reset(new m_imp);
94 m_imp_ptr->m_path1 = path1_arg;
95 }
96 catch (...) { m_imp_ptr.reset(); }
97 }
98
99 filesystem_error(
100 const std::string & what_arg, const path& path1_arg,
101 const path& path2_arg, system::error_code ec) BOOST_NOEXCEPT
102 : system::system_error(ec, what_arg)
103 {
104 try
105 {
106 m_imp_ptr.reset(new m_imp);
107 m_imp_ptr->m_path1 = path1_arg;
108 m_imp_ptr->m_path2 = path2_arg;
109 }
110 catch (...) { m_imp_ptr.reset(); }
111 }
112
113 ~filesystem_error() BOOST_NOEXCEPT_OR_NOTHROW{}
114
115 const path& path1() const BOOST_NOEXCEPT
116 {
117 static const path empty_path;
118 return m_imp_ptr.get() ? m_imp_ptr->m_path1 : empty_path;
119 }
120 const path& path2() const BOOST_NOEXCEPT
121 {
122 static const path empty_path;
123 return m_imp_ptr.get() ? m_imp_ptr->m_path2 : empty_path;
124 }
125
126 const char* what() const BOOST_NOEXCEPT_OR_NOTHROW
127 {
128 if (!m_imp_ptr.get())
129 return system::system_error::what();
130
131 try
132 {
133 if (m_imp_ptr->m_what.empty())
134 {
135 m_imp_ptr->m_what = system::system_error::what();
136 if (!m_imp_ptr->m_path1.empty())
137 {
138 m_imp_ptr->m_what += ": \"";
139 m_imp_ptr->m_what += m_imp_ptr->m_path1.string();
140 m_imp_ptr->m_what += "\"";
141 }
142 if (!m_imp_ptr->m_path2.empty())
143 {
144 m_imp_ptr->m_what += ", \"";
145 m_imp_ptr->m_what += m_imp_ptr->m_path2.string();
146 m_imp_ptr->m_what += "\"";
147 }
148 }
149 return m_imp_ptr->m_what.c_str();
150 }
151 catch (...)
152 {
153 return system::system_error::what();
154 }
155 }
156
157 private:
158 struct m_imp
159 {
160 path m_path1; // may be empty()
161 path m_path2; // may be empty()
162 std::string m_what; // not built until needed
163 };
164 boost::shared_ptr<m_imp> m_imp_ptr;
165 };
166
167//--------------------------------------------------------------------------------------//
168// file_type //
169//--------------------------------------------------------------------------------------//
170
171 enum file_type
172 {
173 status_error,
174# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
175 status_unknown = status_error,
176# endif
177 file_not_found,
178 regular_file,
179 directory_file,
180 // the following may not apply to some operating systems or file systems
181 symlink_file,
182 block_file,
183 character_file,
184 fifo_file,
185 socket_file,
186 reparse_file, // Windows: FILE_ATTRIBUTE_REPARSE_POINT that is not a symlink
187 type_unknown, // file does exist, but isn't one of the above types or
188 // we don't have strong enough permission to find its type
189
190 _detail_directory_symlink // internal use only; never exposed to users
191 };
192
193//--------------------------------------------------------------------------------------//
194// perms //
195//--------------------------------------------------------------------------------------//
196
197 enum perms
198 {
199 no_perms = 0, // file_not_found is no_perms rather than perms_not_known
200
201 // POSIX equivalent macros given in comments.
202 // Values are from POSIX and are given in octal per the POSIX standard.
203
204 // permission bits
205
206 owner_read = 0400, // S_IRUSR, Read permission, owner
207 owner_write = 0200, // S_IWUSR, Write permission, owner
208 owner_exe = 0100, // S_IXUSR, Execute/search permission, owner
209 owner_all = 0700, // S_IRWXU, Read, write, execute/search by owner
210
211 group_read = 040, // S_IRGRP, Read permission, group
212 group_write = 020, // S_IWGRP, Write permission, group
213 group_exe = 010, // S_IXGRP, Execute/search permission, group
214 group_all = 070, // S_IRWXG, Read, write, execute/search by group
215
216 others_read = 04, // S_IROTH, Read permission, others
217 others_write = 02, // S_IWOTH, Write permission, others
218 others_exe = 01, // S_IXOTH, Execute/search permission, others
219 others_all = 07, // S_IRWXO, Read, write, execute/search by others
220
221 all_all = 0777, // owner_all|group_all|others_all
222
223 // other POSIX bits
224
225 set_uid_on_exe = 04000, // S_ISUID, Set-user-ID on execution
226 set_gid_on_exe = 02000, // S_ISGID, Set-group-ID on execution
227 sticky_bit = 01000, // S_ISVTX,
228 // (POSIX XSI) On directories, restricted deletion flag
229 // (V7) 'sticky bit': save swapped text even after use
230 // (SunOS) On non-directories: don't cache this file
231 // (SVID-v4.2) On directories: restricted deletion flag
232 // Also see http://en.wikipedia.org/wiki/Sticky_bit
233
234 perms_mask = 07777, // all_all|set_uid_on_exe|set_gid_on_exe|sticky_bit
235
236 perms_not_known = 0xFFFF, // present when directory_entry cache not loaded
237
238 // options for permissions() function
239
240 add_perms = 0x1000, // adds the given permission bits to the current bits
241 remove_perms = 0x2000, // removes the given permission bits from the current bits;
242 // choose add_perms or remove_perms, not both; if neither add_perms
243 // nor remove_perms is given, replace the current bits with
244 // the given bits.
245
246 symlink_perms = 0x4000 // on POSIX, don't resolve symlinks; implied on Windows
247 };
248
249 BOOST_BITMASK(perms)
250
251//--------------------------------------------------------------------------------------//
252// file_status //
253//--------------------------------------------------------------------------------------//
254
255 class BOOST_FILESYSTEM_DECL file_status
256 {
257 public:
258 file_status() BOOST_NOEXCEPT
259 : m_value(status_error), m_perms(perms_not_known) {}
260 explicit file_status(file_type v) BOOST_NOEXCEPT
261 : m_value(v), m_perms(perms_not_known) {}
262 file_status(file_type v, perms prms) BOOST_NOEXCEPT
263 : m_value(v), m_perms(prms) {}
264
265 // As of October 2015 the interaction between noexcept and =default is so troublesome
266 // for VC++, GCC, and probably other compilers, that =default is not used with noexcept
267 // functions. GCC is not even consistent for the same release on different platforms.
268
269 file_status(const file_status& rhs) BOOST_NOEXCEPT
270 : m_value(rhs.m_value), m_perms(rhs.m_perms) {}
271 file_status& operator=(const file_status& rhs) BOOST_NOEXCEPT
272 {
273 m_value = rhs.m_value;
274 m_perms = rhs.m_perms;
275 return *this;
276 }
277
278# if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
279 file_status(file_status&& rhs) BOOST_NOEXCEPT
280 {
281 m_value = std::move(rhs.m_value);
282 m_perms = std::move(rhs.m_perms);
283 }
284 file_status& operator=(file_status&& rhs) BOOST_NOEXCEPT
285 {
286 m_value = std::move(rhs.m_value);
287 m_perms = std::move(rhs.m_perms);
288 return *this;
289 }
290# endif
291
292
293 // observers
294 file_type type() const BOOST_NOEXCEPT { return m_value; }
295 perms permissions() const BOOST_NOEXCEPT { return m_perms; }
296
297 // modifiers
298 void type(file_type v) BOOST_NOEXCEPT { m_value = v; }
299 void permissions(perms prms) BOOST_NOEXCEPT { m_perms = prms; }
300
301 bool operator==(const file_status& rhs) const BOOST_NOEXCEPT
302 { return type() == rhs.type() &&
303 permissions() == rhs.permissions(); }
304 bool operator!=(const file_status& rhs) const BOOST_NOEXCEPT
305 { return !(*this == rhs); }
306
307 private:
308 file_type m_value;
309 enum perms m_perms;
310 };
311
312 inline bool type_present(file_status f) BOOST_NOEXCEPT
313 { return f.type() != status_error; }
314 inline bool permissions_present(file_status f) BOOST_NOEXCEPT
315 {return f.permissions() != perms_not_known;}
316 inline bool status_known(file_status f) BOOST_NOEXCEPT
317 { return type_present(f) && permissions_present(f); }
318 inline bool exists(file_status f) BOOST_NOEXCEPT
319 { return f.type() != status_error
320 && f.type() != file_not_found; }
321 inline bool is_regular_file(file_status f) BOOST_NOEXCEPT
322 { return f.type() == regular_file; }
323 inline bool is_directory(file_status f) BOOST_NOEXCEPT
324 { return f.type() == directory_file; }
325 inline bool is_symlink(file_status f) BOOST_NOEXCEPT
326 { return f.type() == symlink_file; }
327 inline bool is_other(file_status f) BOOST_NOEXCEPT
328 { return exists(f) && !is_regular_file(f)
329 && !is_directory(f) && !is_symlink(f); }
330
331# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
332 inline bool is_regular(file_status f) BOOST_NOEXCEPT { return f.type() == regular_file; }
333# endif
334
335 struct space_info
336 {
337 // all values are byte counts
338 boost::uintmax_t capacity;
339 boost::uintmax_t free; // <= capacity
340 boost::uintmax_t available; // <= free
341 };
342
343 BOOST_SCOPED_ENUM_START(copy_option)
344 {none=0, fail_if_exists = none, overwrite_if_exists};
345 BOOST_SCOPED_ENUM_END
346
347//--------------------------------------------------------------------------------------//
348// implementation details //
349//--------------------------------------------------------------------------------------//
350
351 namespace detail
352 {
353 // We cannot pass a BOOST_SCOPED_ENUM to a compled function because it will result
354 // in an undefined reference if the library is compled with -std=c++0x but the use
355 // is compiled in C++03 mode, or visa versa. See tickets 6124, 6779, 10038.
356 enum copy_option {none=0, fail_if_exists = none, overwrite_if_exists};
357
358 BOOST_FILESYSTEM_DECL
359 file_status status(const path&p, system::error_code* ec=0);
360 BOOST_FILESYSTEM_DECL
361 file_status symlink_status(const path& p, system::error_code* ec=0);
362 BOOST_FILESYSTEM_DECL
363 bool is_empty(const path& p, system::error_code* ec=0);
364 BOOST_FILESYSTEM_DECL
365 path initial_path(system::error_code* ec=0);
366 BOOST_FILESYSTEM_DECL
367 path canonical(const path& p, const path& base, system::error_code* ec=0);
368 BOOST_FILESYSTEM_DECL
369 void copy(const path& from, const path& to, system::error_code* ec=0);
370 BOOST_FILESYSTEM_DECL
371 void copy_directory(const path& from, const path& to, system::error_code* ec=0);
372 BOOST_FILESYSTEM_DECL
373 void copy_file(const path& from, const path& to, // See ticket #2925
374 detail::copy_option option, system::error_code* ec=0);
375 BOOST_FILESYSTEM_DECL
376 void copy_symlink(const path& existing_symlink, const path& new_symlink, system::error_code* ec=0);
377 BOOST_FILESYSTEM_DECL
378 bool create_directories(const path& p, system::error_code* ec=0);
379 BOOST_FILESYSTEM_DECL
380 bool create_directory(const path& p, system::error_code* ec=0);
381 BOOST_FILESYSTEM_DECL
382 void create_directory_symlink(const path& to, const path& from,
383 system::error_code* ec=0);
384 BOOST_FILESYSTEM_DECL
385 void create_hard_link(const path& to, const path& from, system::error_code* ec=0);
386 BOOST_FILESYSTEM_DECL
387 void create_symlink(const path& to, const path& from, system::error_code* ec=0);
388 BOOST_FILESYSTEM_DECL
389 path current_path(system::error_code* ec=0);
390 BOOST_FILESYSTEM_DECL
391 void current_path(const path& p, system::error_code* ec=0);
392 BOOST_FILESYSTEM_DECL
393 bool equivalent(const path& p1, const path& p2, system::error_code* ec=0);
394 BOOST_FILESYSTEM_DECL
395 boost::uintmax_t file_size(const path& p, system::error_code* ec=0);
396 BOOST_FILESYSTEM_DECL
397 boost::uintmax_t hard_link_count(const path& p, system::error_code* ec=0);
398 BOOST_FILESYSTEM_DECL
399 std::time_t last_write_time(const path& p, system::error_code* ec=0);
400 BOOST_FILESYSTEM_DECL
401 void last_write_time(const path& p, const std::time_t new_time,
402 system::error_code* ec=0);
403 BOOST_FILESYSTEM_DECL
404 void permissions(const path& p, perms prms, system::error_code* ec=0);
405 BOOST_FILESYSTEM_DECL
406 path read_symlink(const path& p, system::error_code* ec=0);
407 BOOST_FILESYSTEM_DECL
408 path relative(const path& p, const path& base, system::error_code* ec = 0);
409 BOOST_FILESYSTEM_DECL
410 bool remove(const path& p, system::error_code* ec=0);
411 BOOST_FILESYSTEM_DECL
412 boost::uintmax_t remove_all(const path& p, system::error_code* ec=0);
413 BOOST_FILESYSTEM_DECL
414 void rename(const path& old_p, const path& new_p, system::error_code* ec=0);
415 BOOST_FILESYSTEM_DECL
416 void resize_file(const path& p, uintmax_t size, system::error_code* ec=0);
417 BOOST_FILESYSTEM_DECL
418 space_info space(const path& p, system::error_code* ec=0);
419 BOOST_FILESYSTEM_DECL
420 path system_complete(const path& p, system::error_code* ec=0);
421 BOOST_FILESYSTEM_DECL
422 path temp_directory_path(system::error_code* ec=0);
423 BOOST_FILESYSTEM_DECL
424 path unique_path(const path& p, system::error_code* ec=0);
425 BOOST_FILESYSTEM_DECL
426 path weakly_canonical(const path& p, system::error_code* ec = 0);
427 } // namespace detail
428
429//--------------------------------------------------------------------------------------//
430// //
431// status query functions //
432// //
433//--------------------------------------------------------------------------------------//
434
435 inline
436 file_status status(const path& p) {return detail::status(p);}
437 inline
438 file_status status(const path& p, system::error_code& ec)
439 {return detail::status(p, &ec);}
440 inline
441 file_status symlink_status(const path& p) {return detail::symlink_status(p);}
442 inline
443 file_status symlink_status(const path& p, system::error_code& ec)
444 {return detail::symlink_status(p, &ec);}
445 inline
446 bool exists(const path& p) {return exists(detail::status(p));}
447 inline
448 bool exists(const path& p, system::error_code& ec)
449 {return exists(detail::status(p, &ec));}
450 inline
451 bool is_directory(const path& p) {return is_directory(detail::status(p));}
452 inline
453 bool is_directory(const path& p, system::error_code& ec)
454 {return is_directory(detail::status(p, &ec));}
455 inline
456 bool is_regular_file(const path& p) {return is_regular_file(detail::status(p));}
457 inline
458 bool is_regular_file(const path& p, system::error_code& ec)
459 {return is_regular_file(detail::status(p, &ec));}
460 inline
461 bool is_other(const path& p) {return is_other(detail::status(p));}
462 inline
463 bool is_other(const path& p, system::error_code& ec)
464 {return is_other(detail::status(p, &ec));}
465 inline
466 bool is_symlink(const path& p) {return is_symlink(detail::symlink_status(p));}
467 inline
468 bool is_symlink(const path& p, system::error_code& ec)
469 {return is_symlink(detail::symlink_status(p, &ec));}
470# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
471 inline
472 bool is_regular(const path& p) {return is_regular(detail::status(p));}
473 inline
474 bool is_regular(const path& p, system::error_code& ec)
475 {return is_regular(detail::status(p, &ec));}
476# endif
477
478 inline
479 bool is_empty(const path& p) {return detail::is_empty(p);}
480 inline
481 bool is_empty(const path& p, system::error_code& ec)
482 {return detail::is_empty(p, &ec);}
483
484//--------------------------------------------------------------------------------------//
485// //
486// operational functions //
487// in alphabetical order, unless otherwise noted //
488// //
489//--------------------------------------------------------------------------------------//
490
491 // forward declarations
492 path current_path(); // fwd declaration
493 path initial_path();
494
495 BOOST_FILESYSTEM_DECL
496 path absolute(const path& p, const path& base=current_path());
497 // If base.is_absolute(), throws nothing. Thus no need for ec argument
498
499 inline
500 path canonical(const path& p, const path& base=current_path())
501 {return detail::canonical(p, base);}
502 inline
503 path canonical(const path& p, system::error_code& ec)
504 {return detail::canonical(p, current_path(), &ec);}
505 inline
506 path canonical(const path& p, const path& base, system::error_code& ec)
507 {return detail::canonical(p, base, &ec);}
508
509# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
510 inline
511 path complete(const path& p)
512 {
513 return absolute(p, initial_path());
514 }
515
516 inline
517 path complete(const path& p, const path& base)
518 {
519 return absolute(p, base);
520 }
521# endif
522
523 inline
524 void copy(const path& from, const path& to) {detail::copy(from, to);}
525
526 inline
527 void copy(const path& from, const path& to, system::error_code& ec) BOOST_NOEXCEPT
528 {detail::copy(from, to, &ec);}
529 inline
530 void copy_directory(const path& from, const path& to)
531 {detail::copy_directory(from, to);}
532 inline
533 void copy_directory(const path& from, const path& to, system::error_code& ec) BOOST_NOEXCEPT
534 {detail::copy_directory(from, to, &ec);}
535 inline
536 void copy_file(const path& from, const path& to, // See ticket #2925
537 BOOST_SCOPED_ENUM(copy_option) option)
538 {
539 detail::copy_file(from, to, static_cast<detail::copy_option>(option));
540 }
541 inline
542 void copy_file(const path& from, const path& to)
543 {
544 detail::copy_file(from, to, detail::fail_if_exists);
545 }
546 inline
547 void copy_file(const path& from, const path& to, // See ticket #2925
548 BOOST_SCOPED_ENUM(copy_option) option, system::error_code& ec) BOOST_NOEXCEPT
549 {
550 detail::copy_file(from, to, static_cast<detail::copy_option>(option), &ec);
551 }
552 inline
553 void copy_file(const path& from, const path& to, system::error_code& ec) BOOST_NOEXCEPT
554 {
555 detail::copy_file(from, to, detail::fail_if_exists, &ec);
556 }
557 inline
558 void copy_symlink(const path& existing_symlink,
559 const path& new_symlink) {detail::copy_symlink(existing_symlink, new_symlink);}
560
561 inline
562 void copy_symlink(const path& existing_symlink, const path& new_symlink,
563 system::error_code& ec) BOOST_NOEXCEPT
564 {detail::copy_symlink(existing_symlink, new_symlink, &ec);}
565 inline
566 bool create_directories(const path& p) {return detail::create_directories(p);}
567
568 inline
569 bool create_directories(const path& p, system::error_code& ec) BOOST_NOEXCEPT
570 {return detail::create_directories(p, &ec);}
571 inline
572 bool create_directory(const path& p) {return detail::create_directory(p);}
573
574 inline
575 bool create_directory(const path& p, system::error_code& ec) BOOST_NOEXCEPT
576 {return detail::create_directory(p, &ec);}
577 inline
578 void create_directory_symlink(const path& to, const path& from)
579 {detail::create_directory_symlink(to, from);}
580 inline
581 void create_directory_symlink(const path& to, const path& from, system::error_code& ec) BOOST_NOEXCEPT
582 {detail::create_directory_symlink(to, from, &ec);}
583 inline
584 void create_hard_link(const path& to, const path& new_hard_link) {detail::create_hard_link(to, new_hard_link);}
585
586 inline
587 void create_hard_link(const path& to, const path& new_hard_link, system::error_code& ec) BOOST_NOEXCEPT
588 {detail::create_hard_link(to, new_hard_link, &ec);}
589 inline
590 void create_symlink(const path& to, const path& new_symlink) {detail::create_symlink(to, new_symlink);}
591
592 inline
593 void create_symlink(const path& to, const path& new_symlink, system::error_code& ec) BOOST_NOEXCEPT
594 {detail::create_symlink(to, new_symlink, &ec);}
595 inline
596 path current_path() {return detail::current_path();}
597
598 inline
599 path current_path(system::error_code& ec) BOOST_NOEXCEPT {return detail::current_path(&ec);}
600
601 inline
602 void current_path(const path& p) {detail::current_path(p);}
603
604 inline
605 void current_path(const path& p, system::error_code& ec) BOOST_NOEXCEPT {detail::current_path(p, &ec);}
606
607 inline
608 bool equivalent(const path& p1, const path& p2) {return detail::equivalent(p1, p2);}
609
610 inline
611 bool equivalent(const path& p1, const path& p2, system::error_code& ec) BOOST_NOEXCEPT
612 {return detail::equivalent(p1, p2, &ec);}
613 inline
614 boost::uintmax_t file_size(const path& p) {return detail::file_size(p);}
615
616 inline
617 boost::uintmax_t file_size(const path& p, system::error_code& ec) BOOST_NOEXCEPT
618 {return detail::file_size(p, &ec);}
619 inline
620 boost::uintmax_t hard_link_count(const path& p) {return detail::hard_link_count(p);}
621
622 inline
623 boost::uintmax_t hard_link_count(const path& p, system::error_code& ec) BOOST_NOEXCEPT
624 {return detail::hard_link_count(p, &ec);}
625 inline
626 path initial_path() {return detail::initial_path();}
627
628 inline
629 path initial_path(system::error_code& ec) {return detail::initial_path(&ec);}
630
631 template <class Path>
632 path initial_path() {return initial_path();}
633 template <class Path>
634 path initial_path(system::error_code& ec) {return detail::initial_path(&ec);}
635
636 inline
637 std::time_t last_write_time(const path& p) {return detail::last_write_time(p);}
638
639 inline
640 std::time_t last_write_time(const path& p, system::error_code& ec) BOOST_NOEXCEPT
641 {return detail::last_write_time(p, &ec);}
642 inline
643 void last_write_time(const path& p, const std::time_t new_time)
644 {detail::last_write_time(p, new_time);}
645 inline
646 void last_write_time(const path& p, const std::time_t new_time,
647 system::error_code& ec) BOOST_NOEXCEPT
648 {detail::last_write_time(p, new_time, &ec);}
649 inline
650 void permissions(const path& p, perms prms)
651 {detail::permissions(p, prms);}
652 inline
653 void permissions(const path& p, perms prms, system::error_code& ec) BOOST_NOEXCEPT
654 {detail::permissions(p, prms, &ec);}
655
656 inline
657 path read_symlink(const path& p) {return detail::read_symlink(p);}
658
659 inline
660 path read_symlink(const path& p, system::error_code& ec)
661 {return detail::read_symlink(p, &ec);}
662 inline
663 // For standardization, if the committee doesn't like "remove", consider "eliminate"
664 bool remove(const path& p) {return detail::remove(p);}
665
666 inline
667 bool remove(const path& p, system::error_code& ec) BOOST_NOEXCEPT
668 {return detail::remove(p, &ec);}
669
670 inline
671 boost::uintmax_t remove_all(const path& p) {return detail::remove_all(p);}
672
673 inline
674 boost::uintmax_t remove_all(const path& p, system::error_code& ec) BOOST_NOEXCEPT
675 {return detail::remove_all(p, &ec);}
676 inline
677 void rename(const path& old_p, const path& new_p) {detail::rename(old_p, new_p);}
678
679 inline
680 void rename(const path& old_p, const path& new_p, system::error_code& ec) BOOST_NOEXCEPT
681 {detail::rename(old_p, new_p, &ec);}
682 inline // name suggested by Scott McMurray
683 void resize_file(const path& p, uintmax_t size) {detail::resize_file(p, size);}
684
685 inline
686 void resize_file(const path& p, uintmax_t size, system::error_code& ec) BOOST_NOEXCEPT
687 {detail::resize_file(p, size, &ec);}
688 inline
689 path relative(const path& p, const path& base=current_path())
690 {return detail::relative(p, base);}
691 inline
692 path relative(const path& p, system::error_code& ec)
693 {return detail::relative(p, current_path(), &ec);}
694 inline
695 path relative(const path& p, const path& base, system::error_code& ec)
696 {return detail::relative(p, base, &ec);}
697 inline
698 space_info space(const path& p) {return detail::space(p);}
699
700 inline
701 space_info space(const path& p, system::error_code& ec) BOOST_NOEXCEPT
702 {return detail::space(p, &ec);}
703
704# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
705 inline bool symbolic_link_exists(const path& p)
706 { return is_symlink(symlink_status(p)); }
707# endif
708
709 inline
710 path system_complete(const path& p) {return detail::system_complete(p);}
711
712 inline
713 path system_complete(const path& p, system::error_code& ec)
714 {return detail::system_complete(p, &ec);}
715 inline
716 path temp_directory_path() {return detail::temp_directory_path();}
717
718 inline
719 path temp_directory_path(system::error_code& ec)
720 {return detail::temp_directory_path(&ec);}
721 inline
722 path unique_path(const path& p="%%%%-%%%%-%%%%-%%%%")
723 {return detail::unique_path(p);}
724 inline
725 path unique_path(const path& p, system::error_code& ec)
726 {return detail::unique_path(p, &ec);}
727 inline
728 path weakly_canonical(const path& p) {return detail::weakly_canonical(p);}
729
730 inline
731 path weakly_canonical(const path& p, system::error_code& ec)
732 {return detail::weakly_canonical(p, &ec);}
733
734//--------------------------------------------------------------------------------------//
735// //
736// directory_entry //
737// //
738//--------------------------------------------------------------------------------------//
739
740// GCC has a problem with a member function named path within a namespace or
741// sub-namespace that also has a class named path. The workaround is to always
742// fully qualify the name path when it refers to the class name.
743
744class BOOST_FILESYSTEM_DECL directory_entry
745{
746public:
747 typedef boost::filesystem::path::value_type value_type; // enables class path ctor taking directory_entry
748
749 directory_entry() BOOST_NOEXCEPT {}
750 explicit directory_entry(const boost::filesystem::path& p)
751 : m_path(p), m_status(file_status()), m_symlink_status(file_status())
752 {}
753 directory_entry(const boost::filesystem::path& p,
754 file_status st, file_status symlink_st = file_status())
755 : m_path(p), m_status(st), m_symlink_status(symlink_st) {}
756
757 directory_entry(const directory_entry& rhs)
758 : m_path(rhs.m_path), m_status(rhs.m_status), m_symlink_status(rhs.m_symlink_status){}
759
760 directory_entry& operator=(const directory_entry& rhs)
761 {
762 m_path = rhs.m_path;
763 m_status = rhs.m_status;
764 m_symlink_status = rhs.m_symlink_status;
765 return *this;
766 }
767
768 // As of October 2015 the interaction between noexcept and =default is so troublesome
769 // for VC++, GCC, and probably other compilers, that =default is not used with noexcept
770 // functions. GCC is not even consistent for the same release on different platforms.
771
772#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
773 directory_entry(directory_entry&& rhs) BOOST_NOEXCEPT
774 {
775 m_path = std::move(rhs.m_path);
776 m_status = std::move(rhs.m_status);
777 m_symlink_status = std::move(rhs.m_symlink_status);
778 }
779 directory_entry& operator=(directory_entry&& rhs) BOOST_NOEXCEPT
780 {
781 m_path = std::move(rhs.m_path);
782 m_status = std::move(rhs.m_status);
783 m_symlink_status = std::move(rhs.m_symlink_status);
784 return *this;
785 }
786#endif
787
788 void assign(const boost::filesystem::path& p,
789 file_status st = file_status(), file_status symlink_st = file_status())
790 { m_path = p; m_status = st; m_symlink_status = symlink_st; }
791
792 void replace_filename(const boost::filesystem::path& p,
793 file_status st = file_status(), file_status symlink_st = file_status())
794 {
795 m_path.remove_filename();
796 m_path /= p;
797 m_status = st;
798 m_symlink_status = symlink_st;
799 }
800
801# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
802 void replace_leaf(const boost::filesystem::path& p,
803 file_status st, file_status symlink_st)
804 { replace_filename(p, st, symlink_st); }
805# endif
806
807 const boost::filesystem::path& path() const BOOST_NOEXCEPT {return m_path;}
808 operator const boost::filesystem::path&() const BOOST_NOEXCEPT
809 {return m_path;}
810 file_status status() const {return m_get_status();}
811 file_status status(system::error_code& ec) const BOOST_NOEXCEPT
812 {return m_get_status(&ec); }
813 file_status symlink_status() const {return m_get_symlink_status();}
814 file_status symlink_status(system::error_code& ec) const BOOST_NOEXCEPT
815 {return m_get_symlink_status(&ec); }
816
817 bool operator==(const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path == rhs.m_path; }
818 bool operator!=(const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path != rhs.m_path;}
819 bool operator< (const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path < rhs.m_path;}
820 bool operator<=(const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path <= rhs.m_path;}
821 bool operator> (const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path > rhs.m_path;}
822 bool operator>=(const directory_entry& rhs) const BOOST_NOEXCEPT {return m_path >= rhs.m_path;}
823
824private:
825 boost::filesystem::path m_path;
826 mutable file_status m_status; // stat()-like
827 mutable file_status m_symlink_status; // lstat()-like
828
829 file_status m_get_status(system::error_code* ec=0) const;
830 file_status m_get_symlink_status(system::error_code* ec=0) const;
831}; // directory_entry
832
833//--------------------------------------------------------------------------------------//
834// //
835// directory_iterator helpers //
836// //
837//--------------------------------------------------------------------------------------//
838
839class directory_iterator;
840
841namespace detail
842{
843 BOOST_FILESYSTEM_DECL
844 system::error_code dir_itr_close(// never throws()
845 void *& handle
846# if defined(BOOST_POSIX_API)
847 , void *& buffer
848# endif
849 );
850
851 struct dir_itr_imp
852 {
853 directory_entry dir_entry;
854 void* handle;
855
856# ifdef BOOST_POSIX_API
857 void* buffer; // see dir_itr_increment implementation
858# endif
859
860 dir_itr_imp() : handle(0)
861# ifdef BOOST_POSIX_API
862 , buffer(0)
863# endif
864 {}
865
866 ~dir_itr_imp() // never throws
867 {
868 dir_itr_close(handle
869# if defined(BOOST_POSIX_API)
870 , buffer
871# endif
872 );
873 }
874 };
875
876 // see path::iterator: comment below
877 BOOST_FILESYSTEM_DECL void directory_iterator_construct(directory_iterator& it,
878 const path& p, system::error_code* ec);
879 BOOST_FILESYSTEM_DECL void directory_iterator_increment(directory_iterator& it,
880 system::error_code* ec);
881
882} // namespace detail
883
884//--------------------------------------------------------------------------------------//
885// //
886// directory_iterator //
887// //
888//--------------------------------------------------------------------------------------//
889
890 class directory_iterator
891 : public boost::iterator_facade< directory_iterator,
892 directory_entry,
893 boost::single_pass_traversal_tag >
894 {
895 public:
896
897 directory_iterator() BOOST_NOEXCEPT {} // creates the "end" iterator
898
899 // iterator_facade derived classes don't seem to like implementations in
900 // separate translation unit dll's, so forward to detail functions
901 explicit directory_iterator(const path& p)
902 : m_imp(new detail::dir_itr_imp)
903 { detail::directory_iterator_construct(*this, p, 0); }
904
905 directory_iterator(const path& p, system::error_code& ec) BOOST_NOEXCEPT
906 : m_imp(new detail::dir_itr_imp)
907 { detail::directory_iterator_construct(*this, p, &ec); }
908
909 ~directory_iterator() {}
910
911 directory_iterator& increment(system::error_code& ec) BOOST_NOEXCEPT
912 {
913 detail::directory_iterator_increment(*this, &ec);
914 return *this;
915 }
916
917 private:
918 friend struct detail::dir_itr_imp;
919 friend BOOST_FILESYSTEM_DECL void detail::directory_iterator_construct(directory_iterator& it,
920 const path& p, system::error_code* ec);
921 friend BOOST_FILESYSTEM_DECL void detail::directory_iterator_increment(directory_iterator& it,
922 system::error_code* ec);
923
924 // shared_ptr provides the shallow-copy semantics required for single pass iterators
925 // (i.e. InputIterators). The end iterator is indicated by !m_imp || !m_imp->handle
926 boost::shared_ptr< detail::dir_itr_imp > m_imp;
927
928 friend class boost::iterator_core_access;
929
930 boost::iterator_facade<
931 directory_iterator,
932 directory_entry,
933 boost::single_pass_traversal_tag >::reference dereference() const
934 {
935 BOOST_ASSERT_MSG(m_imp.get(), "attempt to dereference end iterator");
936 return m_imp->dir_entry;
937 }
938
939 void increment() { detail::directory_iterator_increment(*this, 0); }
940
941 bool equal(const directory_iterator& rhs) const
942 {
943 return m_imp == rhs.m_imp
944 || (!m_imp && rhs.m_imp && !rhs.m_imp->handle)
945 || (!rhs.m_imp && m_imp && !m_imp->handle);
946 }
947
948 }; // directory_iterator
949
950 // enable directory_iterator C++11 range-base for statement use --------------------//
951
952 // begin() and end() are only used by a range-based for statement in the context of
953 // auto - thus the top-level const is stripped - so returning const is harmless and
954 // emphasizes begin() is just a pass through.
955 inline
956 const directory_iterator& begin(const directory_iterator& iter) BOOST_NOEXCEPT
957 {return iter;}
958 inline
959 directory_iterator end(const directory_iterator&) BOOST_NOEXCEPT
960 {return directory_iterator();}
961
962 // enable directory_iterator BOOST_FOREACH -----------------------------------------//
963
964 inline
965 directory_iterator& range_begin(directory_iterator& iter) BOOST_NOEXCEPT
966 {return iter;}
967 inline
968 directory_iterator range_begin(const directory_iterator& iter) BOOST_NOEXCEPT
969 {return iter;}
970 inline
971 directory_iterator range_end(const directory_iterator&) BOOST_NOEXCEPT
972 {return directory_iterator();}
973 } // namespace filesystem
974
975 // namespace boost template specializations
976 template<>
977 struct range_mutable_iterator<boost::filesystem::directory_iterator>
978 { typedef boost::filesystem::directory_iterator type; };
979 template<>
980 struct range_const_iterator <boost::filesystem::directory_iterator>
981 { typedef boost::filesystem::directory_iterator type; };
982
983namespace filesystem
984{
985
986//--------------------------------------------------------------------------------------//
987// //
988// recursive_directory_iterator helpers //
989// //
990//--------------------------------------------------------------------------------------//
991
992 BOOST_SCOPED_ENUM_START(symlink_option)
993 {
994 none,
995 no_recurse = none, // don't follow directory symlinks (default behavior)
996 recurse, // follow directory symlinks
997 _detail_no_push = recurse << 1 // internal use only
998 };
999 BOOST_SCOPED_ENUM_END
1000
1001 BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option))
1002
1003 namespace detail
1004 {
1005 struct recur_dir_itr_imp
1006 {
1007 typedef directory_iterator element_type;
1008 std::stack< element_type, std::vector< element_type > > m_stack;
1009 int m_level;
1010 BOOST_SCOPED_ENUM(symlink_option) m_options;
1011
1012 recur_dir_itr_imp() : m_level(0), m_options(symlink_option::none) {}
1013
1014 void increment(system::error_code* ec); // ec == 0 means throw on error
1015
1016 bool push_directory(system::error_code& ec) BOOST_NOEXCEPT;
1017
1018 void pop();
1019
1020 };
1021
1022 // Implementation is inline to avoid dynamic linking difficulties with m_stack:
1023 // Microsoft warning C4251, m_stack needs to have dll-interface to be used by
1024 // clients of struct 'boost::filesystem::detail::recur_dir_itr_imp'
1025
1026 inline
1027 bool recur_dir_itr_imp::push_directory(system::error_code& ec) BOOST_NOEXCEPT
1028 // Returns: true if push occurs, otherwise false. Always returns false on error.
1029 {
1030 ec.clear();
1031
1032 // Discover if the iterator is for a directory that needs to be recursed into,
1033 // taking symlinks and options into account.
1034
1035 if ((m_options & symlink_option::_detail_no_push) == symlink_option::_detail_no_push)
1036 {
1037 m_options &= ~symlink_option::_detail_no_push;
1038 return false;
1039 }
1040
1041 file_status symlink_stat;
1042
1043 // if we are not recursing into symlinks, we are going to have to know if the
1044 // stack top is a symlink, so get symlink_status and verify no error occurred
1045 if ((m_options & symlink_option::recurse) != symlink_option::recurse)
1046 {
1047 symlink_stat = m_stack.top()->symlink_status(ec);
1048 if (ec)
1049 return false;
1050 }
1051
1052 // Logic for following predicate was contributed by Daniel Aarno to handle cyclic
1053 // symlinks correctly and efficiently, fixing ticket #5652.
1054 // if (((m_options & symlink_option::recurse) == symlink_option::recurse
1055 // || !is_symlink(m_stack.top()->symlink_status()))
1056 // && is_directory(m_stack.top()->status())) ...
1057 // The predicate code has since been rewritten to pass error_code arguments,
1058 // per ticket #5653.
1059
1060 if ((m_options & symlink_option::recurse) == symlink_option::recurse
1061 || !is_symlink(symlink_stat))
1062 {
1063 file_status stat = m_stack.top()->status(ec);
1064 if (ec || !is_directory(stat))
1065 return false;
1066
1067 directory_iterator next(m_stack.top()->path(), ec);
1068 if (!ec && next != directory_iterator())
1069 {
1070 m_stack.push(next);
1071 ++m_level;
1072 return true;
1073 }
1074 }
1075 return false;
1076 }
1077
1078 inline
1079 void recur_dir_itr_imp::increment(system::error_code* ec)
1080 // ec == 0 means throw on error
1081 //
1082 // Invariant: On return, the top of the iterator stack is the next valid (possibly
1083 // end) iterator, regardless of whether or not an error is reported, and regardless of
1084 // whether any error is reported by exception or error code. In other words, progress
1085 // is always made so a loop on the iterator will always eventually terminate
1086 // regardless of errors.
1087 {
1088 system::error_code ec_push_directory;
1089
1090 // if various conditions are met, push a directory_iterator into the iterator stack
1091 if (push_directory(ec_push_directory))
1092 {
1093 if (ec)
1094 ec->clear();
1095 return;
1096 }
1097
1098 // Do the actual increment operation on the top iterator in the iterator
1099 // stack, popping the stack if necessary, until either the stack is empty or a
1100 // non-end iterator is reached.
1101 while (!m_stack.empty() && ++m_stack.top() == directory_iterator())
1102 {
1103 m_stack.pop();
1104 --m_level;
1105 }
1106
1107 // report errors if any
1108 if (ec_push_directory)
1109 {
1110 if (ec)
1111 *ec = ec_push_directory;
1112 else
1113 {
1114 BOOST_FILESYSTEM_THROW(filesystem_error(
1115 "filesystem::recursive_directory_iterator directory error",
1116 ec_push_directory));
1117 }
1118 }
1119 else if (ec)
1120 ec->clear();
1121 }
1122
1123 inline
1124 void recur_dir_itr_imp::pop()
1125 {
1126 BOOST_ASSERT_MSG(m_level > 0,
1127 "pop() on recursive_directory_iterator with level < 1");
1128
1129 do
1130 {
1131 m_stack.pop();
1132 --m_level;
1133 }
1134 while (!m_stack.empty() && ++m_stack.top() == directory_iterator());
1135 }
1136 } // namespace detail
1137
1138//--------------------------------------------------------------------------------------//
1139// //
1140// recursive_directory_iterator //
1141// //
1142//--------------------------------------------------------------------------------------//
1143
1144 class recursive_directory_iterator
1145 : public boost::iterator_facade<
1146 recursive_directory_iterator,
1147 directory_entry,
1148 boost::single_pass_traversal_tag >
1149 {
1150 public:
1151
1152 recursive_directory_iterator() BOOST_NOEXCEPT {} // creates the "end" iterator
1153
1154 explicit recursive_directory_iterator(const path& dir_path) // throws if !exists()
1155 : m_imp(new detail::recur_dir_itr_imp)
1156 {
1157 m_imp->m_options = symlink_option::none;
1158 m_imp->m_stack.push(directory_iterator(dir_path));
1159 if (m_imp->m_stack.top() == directory_iterator())
1160 { m_imp.reset(); }
1161 }
1162
1163 recursive_directory_iterator(const path& dir_path,
1164 BOOST_SCOPED_ENUM(symlink_option) opt) // throws if !exists()
1165 : m_imp(new detail::recur_dir_itr_imp)
1166 {
1167 m_imp->m_options = opt;
1168 m_imp->m_stack.push(directory_iterator(dir_path));
1169 if (m_imp->m_stack.top() == directory_iterator())
1170 { m_imp.reset (); }
1171 }
1172
1173 recursive_directory_iterator(const path& dir_path,
1174 BOOST_SCOPED_ENUM(symlink_option) opt,
1175 system::error_code & ec) BOOST_NOEXCEPT
1176 : m_imp(new detail::recur_dir_itr_imp)
1177 {
1178 m_imp->m_options = opt;
1179 m_imp->m_stack.push(directory_iterator(dir_path, ec));
1180 if (m_imp->m_stack.top() == directory_iterator())
1181 { m_imp.reset (); }
1182 }
1183
1184 recursive_directory_iterator(const path& dir_path,
1185 system::error_code & ec) BOOST_NOEXCEPT
1186 : m_imp(new detail::recur_dir_itr_imp)
1187 {
1188 m_imp->m_options = symlink_option::none;
1189 m_imp->m_stack.push(directory_iterator(dir_path, ec));
1190 if (m_imp->m_stack.top() == directory_iterator())
1191 { m_imp.reset (); }
1192 }
1193
1194 recursive_directory_iterator& increment(system::error_code& ec) BOOST_NOEXCEPT
1195 {
1196 BOOST_ASSERT_MSG(m_imp.get(),
1197 "increment() on end recursive_directory_iterator");
1198 m_imp->increment(&ec);
1199 if (m_imp->m_stack.empty())
1200 m_imp.reset(); // done, so make end iterator
1201 return *this;
1202 }
1203
1204 int depth() const BOOST_NOEXCEPT
1205 {
1206 BOOST_ASSERT_MSG(m_imp.get(),
1207 "depth() on end recursive_directory_iterator");
1208 return m_imp->m_level;
1209 }
1210
1211 int level() const BOOST_NOEXCEPT { return depth(); }
1212
1213 bool recursion_pending() const BOOST_NOEXCEPT
1214 {
1215 BOOST_ASSERT_MSG(m_imp.get(),
1216 "is_no_push_requested() on end recursive_directory_iterator");
1217 return (m_imp->m_options & symlink_option::_detail_no_push)
1218 == symlink_option::_detail_no_push;
1219 }
1220
1221 bool no_push_pending() const BOOST_NOEXCEPT { return recursion_pending(); }
1222
1223# ifndef BOOST_FILESYSTEM_NO_DEPRECATED
1224 bool no_push_request() const BOOST_NOEXCEPT { return no_push_pending(); }
1225# endif
1226
1227 void pop()
1228 {
1229 BOOST_ASSERT_MSG(m_imp.get(),
1230 "pop() on end recursive_directory_iterator");
1231 m_imp->pop();
1232 if (m_imp->m_stack.empty()) m_imp.reset(); // done, so make end iterator
1233 }
1234
1235 void disable_recursion_pending(bool value=true) BOOST_NOEXCEPT
1236 {
1237 BOOST_ASSERT_MSG(m_imp.get(),
1238 "no_push() on end recursive_directory_iterator");
1239 if (value)
1240 m_imp->m_options |= symlink_option::_detail_no_push;
1241 else
1242 m_imp->m_options &= ~symlink_option::_detail_no_push;
1243 }
1244
1245 void no_push(bool value=true) BOOST_NOEXCEPT { disable_recursion_pending(value); }
1246
1247 file_status status() const
1248 {
1249 BOOST_ASSERT_MSG(m_imp.get(),
1250 "status() on end recursive_directory_iterator");
1251 return m_imp->m_stack.top()->status();
1252 }
1253
1254 file_status symlink_status() const
1255 {
1256 BOOST_ASSERT_MSG(m_imp.get(),
1257 "symlink_status() on end recursive_directory_iterator");
1258 return m_imp->m_stack.top()->symlink_status();
1259 }
1260
1261 private:
1262
1263 // shared_ptr provides the shallow-copy semantics required for single pass iterators
1264 // (i.e. InputIterators).
1265 // The end iterator is indicated by !m_imp || m_imp->m_stack.empty()
1266 boost::shared_ptr< detail::recur_dir_itr_imp > m_imp;
1267
1268 friend class boost::iterator_core_access;
1269
1270 boost::iterator_facade<
1271 recursive_directory_iterator,
1272 directory_entry,
1273 boost::single_pass_traversal_tag >::reference
1274 dereference() const
1275 {
1276 BOOST_ASSERT_MSG(m_imp.get(),
1277 "dereference of end recursive_directory_iterator");
1278 return *m_imp->m_stack.top();
1279 }
1280
1281 void increment()
1282 {
1283 BOOST_ASSERT_MSG(m_imp.get(),
1284 "increment of end recursive_directory_iterator");
1285 m_imp->increment(0);
1286 if (m_imp->m_stack.empty())
1287 m_imp.reset(); // done, so make end iterator
1288 }
1289
1290 bool equal(const recursive_directory_iterator& rhs) const
1291 {
1292 return m_imp == rhs.m_imp
1293 || (!m_imp && rhs.m_imp && rhs.m_imp->m_stack.empty())
1294 || (!rhs.m_imp && m_imp && m_imp->m_stack.empty()) ;
1295 }
1296
1297 }; // recursive directory iterator
1298
1299 // enable recursive directory iterator C++11 range-base for statement use ----------//
1300
1301 // begin() and end() are only used by a range-based for statement in the context of
1302 // auto - thus the top-level const is stripped - so returning const is harmless and
1303 // emphasizes begin() is just a pass through.
1304 inline
1305 const recursive_directory_iterator&
1306 begin(const recursive_directory_iterator& iter) BOOST_NOEXCEPT
1307 {return iter;}
1308 inline
1309 recursive_directory_iterator end(const recursive_directory_iterator&) BOOST_NOEXCEPT
1310 {return recursive_directory_iterator();}
1311
1312 // enable recursive directory iterator BOOST_FOREACH -------------------------------//
1313
1314 inline
1315 recursive_directory_iterator&
1316 range_begin(recursive_directory_iterator& iter) BOOST_NOEXCEPT
1317 {return iter;}
1318 inline
1319 recursive_directory_iterator
1320 range_begin(const recursive_directory_iterator& iter) BOOST_NOEXCEPT
1321 {return iter;}
1322 inline
1323 recursive_directory_iterator range_end(const recursive_directory_iterator&) BOOST_NOEXCEPT
1324 {return recursive_directory_iterator();}
1325 } // namespace filesystem
1326
1327 // namespace boost template specializations
1328 template<>
1329 struct range_mutable_iterator<boost::filesystem::recursive_directory_iterator>
1330 { typedef boost::filesystem::recursive_directory_iterator type; };
1331 template<>
1332 struct range_const_iterator <boost::filesystem::recursive_directory_iterator>
1333 { typedef boost::filesystem::recursive_directory_iterator type; };
1334
1335namespace filesystem
1336{
1337
1338# if !defined(BOOST_FILESYSTEM_NO_DEPRECATED)
1339 typedef recursive_directory_iterator wrecursive_directory_iterator;
1340# endif
1341
1342// test helper -----------------------------------------------------------------------//
1343
1344// Not part of the documented interface since false positives are possible;
1345// there is no law that says that an OS that has large stat.st_size
1346// actually supports large file sizes.
1347
1348 namespace detail
1349 {
1350 BOOST_FILESYSTEM_DECL bool possible_large_file_size_support();
1351 }
1352
1353 } // namespace filesystem
1354} // namespace boost
1355
1356#include <boost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
1357#endif // BOOST_FILESYSTEM3_OPERATIONS_HPP
1358