1 //===-- Path.cpp - Implement OS Path Concept ------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the operating system Path API.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Support/Path.h"
15 #include "llvm/ADT/ArrayRef.h"
16 #include "llvm/Support/Endian.h"
17 #include "llvm/Support/Errc.h"
18 #include "llvm/Support/ErrorHandling.h"
19 #include "llvm/Support/FileSystem.h"
20 #include "llvm/Support/Process.h"
24 #if !defined(_MSC_VER) && !defined(__MINGW32__)
31 using namespace llvm::support::endian;
34 using llvm::StringRef;
35 using llvm::sys::path::is_separator;
36 using llvm::sys::path::Style;
38 inline Style real_style(Style style) {
40 return (style == Style::posix) ? Style::posix : Style::windows;
42 return (style == Style::windows) ? Style::windows : Style::posix;
46 inline const char *separators(Style style) {
47 if (real_style(style) == Style::windows)
52 inline char preferred_separator(Style style) {
53 if (real_style(style) == Style::windows)
58 StringRef find_first_component(StringRef path, Style style) {
59 // Look for this first component in the following order.
60 // * empty (in this case we return an empty string)
61 // * either C: or {//,\\}net.
63 // * {file,directory}name
68 if (real_style(style) == Style::windows) {
70 if (path.size() >= 2 &&
71 std::isalpha(static_cast<unsigned char>(path[0])) && path[1] == ':')
72 return path.substr(0, 2);
76 if ((path.size() > 2) && is_separator(path[0], style) &&
77 path[0] == path[1] && !is_separator(path[2], style)) {
78 // Find the next directory separator.
79 size_t end = path.find_first_of(separators(style), 2);
80 return path.substr(0, end);
84 if (is_separator(path[0], style))
85 return path.substr(0, 1);
87 // * {file,directory}name
88 size_t end = path.find_first_of(separators(style));
89 return path.substr(0, end);
92 size_t filename_pos(StringRef str, Style style) {
93 if (str.size() == 2 && is_separator(str[0], style) && str[0] == str[1])
96 if (str.size() > 0 && is_separator(str[str.size() - 1], style))
97 return str.size() - 1;
99 size_t pos = str.find_last_of(separators(style), str.size() - 1);
101 if (real_style(style) == Style::windows) {
102 if (pos == StringRef::npos)
103 pos = str.find_last_of(':', str.size() - 2);
106 if (pos == StringRef::npos || (pos == 1 && is_separator(str[0], style)))
112 size_t root_dir_start(StringRef str, Style style) {
114 if (real_style(style) == Style::windows) {
115 if (str.size() > 2 && str[1] == ':' && is_separator(str[2], style))
120 if (str.size() == 2 && is_separator(str[0], style) && str[0] == str[1])
121 return StringRef::npos;
124 if (str.size() > 3 && is_separator(str[0], style) && str[0] == str[1] &&
125 !is_separator(str[2], style)) {
126 return str.find_first_of(separators(style), 2);
130 if (str.size() > 0 && is_separator(str[0], style))
133 return StringRef::npos;
136 size_t parent_path_end(StringRef path, Style style) {
137 size_t end_pos = filename_pos(path, style);
139 bool filename_was_sep =
140 path.size() > 0 && is_separator(path[end_pos], style);
142 // Skip separators except for root dir.
143 size_t root_dir_pos = root_dir_start(path.substr(0, end_pos), style);
145 while (end_pos > 0 && (end_pos - 1) != root_dir_pos &&
146 is_separator(path[end_pos - 1], style))
149 if (end_pos == 1 && root_dir_pos == 0 && filename_was_sep)
150 return StringRef::npos;
154 } // end unnamed namespace
162 static std::error_code createUniqueEntity(const Twine &Model, int &ResultFD,
163 SmallVectorImpl<char> &ResultPath,
164 bool MakeAbsolute, unsigned Mode,
166 SmallString<128> ModelStorage;
167 Model.toVector(ModelStorage);
170 // Make model absolute by prepending a temp directory if it's not already.
171 if (!sys::path::is_absolute(Twine(ModelStorage))) {
172 SmallString<128> TDir;
173 sys::path::system_temp_directory(true, TDir);
174 sys::path::append(TDir, Twine(ModelStorage));
175 ModelStorage.swap(TDir);
179 // From here on, DO NOT modify model. It may be needed if the randomly chosen
180 // path already exists.
181 ResultPath = ModelStorage;
183 ResultPath.push_back(0);
184 ResultPath.pop_back();
187 // Replace '%' with random chars.
188 for (unsigned i = 0, e = ModelStorage.size(); i != e; ++i) {
189 if (ModelStorage[i] == '%')
190 ResultPath[i] = "0123456789abcdef"[sys::Process::GetRandomNumber() & 15];
193 // Try to open + create the file.
196 if (std::error_code EC =
197 sys::fs::openFileForWrite(Twine(ResultPath.begin()), ResultFD,
198 sys::fs::F_RW | sys::fs::F_Excl, Mode)) {
199 if (EC == errc::file_exists)
200 goto retry_random_path;
204 return std::error_code();
209 sys::fs::access(ResultPath.begin(), sys::fs::AccessMode::Exist);
210 if (EC == errc::no_such_file_or_directory)
211 return std::error_code();
214 goto retry_random_path;
218 if (std::error_code EC =
219 sys::fs::create_directory(ResultPath.begin(), false)) {
220 if (EC == errc::file_exists)
221 goto retry_random_path;
224 return std::error_code();
227 llvm_unreachable("Invalid Type");
234 const_iterator begin(StringRef path, Style style) {
237 i.Component = find_first_component(path, style);
243 const_iterator end(StringRef path) {
246 i.Position = path.size();
250 const_iterator &const_iterator::operator++() {
251 assert(Position < Path.size() && "Tried to increment past end!");
253 // Increment Position to past the current component
254 Position += Component.size();
257 if (Position == Path.size()) {
258 Component = StringRef();
262 // Both POSIX and Windows treat paths that begin with exactly two separators
264 bool was_net = Component.size() > 2 && is_separator(Component[0], S) &&
265 Component[1] == Component[0] && !is_separator(Component[2], S);
267 // Handle separators.
268 if (is_separator(Path[Position], S)) {
272 (real_style(S) == Style::windows && Component.endswith(":"))) {
273 Component = Path.substr(Position, 1);
277 // Skip extra separators.
278 while (Position != Path.size() && is_separator(Path[Position], S)) {
282 // Treat trailing '/' as a '.'.
283 if (Position == Path.size()) {
290 // Find next component.
291 size_t end_pos = Path.find_first_of(separators(S), Position);
292 Component = Path.slice(Position, end_pos);
297 bool const_iterator::operator==(const const_iterator &RHS) const {
298 return Path.begin() == RHS.Path.begin() && Position == RHS.Position;
301 ptrdiff_t const_iterator::operator-(const const_iterator &RHS) const {
302 return Position - RHS.Position;
305 reverse_iterator rbegin(StringRef Path, Style style) {
308 I.Position = Path.size();
313 reverse_iterator rend(StringRef Path) {
316 I.Component = Path.substr(0, 0);
321 reverse_iterator &reverse_iterator::operator++() {
322 // If we're at the end and the previous char was a '/', return '.' unless
323 // we are the root path.
324 size_t root_dir_pos = root_dir_start(Path, S);
325 if (Position == Path.size() && Path.size() > root_dir_pos + 1 &&
326 is_separator(Path[Position - 1], S)) {
332 // Skip separators unless it's the root directory.
333 size_t end_pos = Position;
335 while (end_pos > 0 && (end_pos - 1) != root_dir_pos &&
336 is_separator(Path[end_pos - 1], S))
339 // Find next separator.
340 size_t start_pos = filename_pos(Path.substr(0, end_pos), S);
341 Component = Path.slice(start_pos, end_pos);
342 Position = start_pos;
346 bool reverse_iterator::operator==(const reverse_iterator &RHS) const {
347 return Path.begin() == RHS.Path.begin() && Component == RHS.Component &&
348 Position == RHS.Position;
351 ptrdiff_t reverse_iterator::operator-(const reverse_iterator &RHS) const {
352 return Position - RHS.Position;
355 StringRef root_path(StringRef path, Style style) {
356 const_iterator b = begin(path, style), pos = b, e = end(path);
359 b->size() > 2 && is_separator((*b)[0], style) && (*b)[1] == (*b)[0];
360 bool has_drive = (real_style(style) == Style::windows) && b->endswith(":");
362 if (has_net || has_drive) {
363 if ((++pos != e) && is_separator((*pos)[0], style)) {
364 // {C:/,//net/}, so get the first two components.
365 return path.substr(0, b->size() + pos->size());
367 // just {C:,//net}, return the first component.
372 // POSIX style root directory.
373 if (is_separator((*b)[0], style)) {
381 StringRef root_name(StringRef path, Style style) {
382 const_iterator b = begin(path, style), e = end(path);
385 b->size() > 2 && is_separator((*b)[0], style) && (*b)[1] == (*b)[0];
386 bool has_drive = (real_style(style) == Style::windows) && b->endswith(":");
388 if (has_net || has_drive) {
389 // just {C:,//net}, return the first component.
394 // No path or no name.
398 StringRef root_directory(StringRef path, Style style) {
399 const_iterator b = begin(path, style), pos = b, e = end(path);
402 b->size() > 2 && is_separator((*b)[0], style) && (*b)[1] == (*b)[0];
403 bool has_drive = (real_style(style) == Style::windows) && b->endswith(":");
405 if ((has_net || has_drive) &&
406 // {C:,//net}, skip to the next component.
407 (++pos != e) && is_separator((*pos)[0], style)) {
411 // POSIX style root directory.
412 if (!has_net && is_separator((*b)[0], style)) {
417 // No path or no root.
421 StringRef relative_path(StringRef path, Style style) {
422 StringRef root = root_path(path, style);
423 return path.substr(root.size());
426 void append(SmallVectorImpl<char> &path, Style style, const Twine &a,
427 const Twine &b, const Twine &c, const Twine &d) {
428 SmallString<32> a_storage;
429 SmallString<32> b_storage;
430 SmallString<32> c_storage;
431 SmallString<32> d_storage;
433 SmallVector<StringRef, 4> components;
434 if (!a.isTriviallyEmpty()) components.push_back(a.toStringRef(a_storage));
435 if (!b.isTriviallyEmpty()) components.push_back(b.toStringRef(b_storage));
436 if (!c.isTriviallyEmpty()) components.push_back(c.toStringRef(c_storage));
437 if (!d.isTriviallyEmpty()) components.push_back(d.toStringRef(d_storage));
439 for (auto &component : components) {
441 !path.empty() && is_separator(path[path.size() - 1], style);
442 bool component_has_sep =
443 !component.empty() && is_separator(component[0], style);
444 bool is_root_name = has_root_name(component, style);
447 // Strip separators from beginning of component.
448 size_t loc = component.find_first_not_of(separators(style));
449 StringRef c = component.substr(loc);
452 path.append(c.begin(), c.end());
456 if (!component_has_sep && !(path.empty() || is_root_name)) {
458 path.push_back(preferred_separator(style));
461 path.append(component.begin(), component.end());
465 void append(SmallVectorImpl<char> &path, const Twine &a, const Twine &b,
466 const Twine &c, const Twine &d) {
467 append(path, Style::native, a, b, c, d);
470 void append(SmallVectorImpl<char> &path, const_iterator begin,
471 const_iterator end, Style style) {
472 for (; begin != end; ++begin)
473 path::append(path, style, *begin);
476 StringRef parent_path(StringRef path, Style style) {
477 size_t end_pos = parent_path_end(path, style);
478 if (end_pos == StringRef::npos)
481 return path.substr(0, end_pos);
484 void remove_filename(SmallVectorImpl<char> &path, Style style) {
485 size_t end_pos = parent_path_end(StringRef(path.begin(), path.size()), style);
486 if (end_pos != StringRef::npos)
487 path.set_size(end_pos);
490 void replace_extension(SmallVectorImpl<char> &path, const Twine &extension,
492 StringRef p(path.begin(), path.size());
493 SmallString<32> ext_storage;
494 StringRef ext = extension.toStringRef(ext_storage);
496 // Erase existing extension.
497 size_t pos = p.find_last_of('.');
498 if (pos != StringRef::npos && pos >= filename_pos(p, style))
501 // Append '.' if needed.
502 if (ext.size() > 0 && ext[0] != '.')
506 path.append(ext.begin(), ext.end());
509 void replace_path_prefix(SmallVectorImpl<char> &Path,
510 const StringRef &OldPrefix, const StringRef &NewPrefix,
512 if (OldPrefix.empty() && NewPrefix.empty())
515 StringRef OrigPath(Path.begin(), Path.size());
516 if (!OrigPath.startswith(OldPrefix))
519 // If prefixes have the same size we can simply copy the new one over.
520 if (OldPrefix.size() == NewPrefix.size()) {
521 std::copy(NewPrefix.begin(), NewPrefix.end(), Path.begin());
525 StringRef RelPath = OrigPath.substr(OldPrefix.size());
526 SmallString<256> NewPath;
527 path::append(NewPath, style, NewPrefix);
528 path::append(NewPath, style, RelPath);
532 void native(const Twine &path, SmallVectorImpl<char> &result, Style style) {
533 assert((!path.isSingleStringRef() ||
534 path.getSingleStringRef().data() != result.data()) &&
535 "path and result are not allowed to overlap!");
538 path.toVector(result);
539 native(result, style);
542 void native(SmallVectorImpl<char> &Path, Style style) {
545 if (real_style(style) == Style::windows) {
546 std::replace(Path.begin(), Path.end(), '/', '\\');
547 if (Path[0] == '~' && (Path.size() == 1 || is_separator(Path[1], style))) {
548 SmallString<128> PathHome;
549 home_directory(PathHome);
550 PathHome.append(Path.begin() + 1, Path.end());
554 for (auto PI = Path.begin(), PE = Path.end(); PI < PE; ++PI) {
557 if (PN < PE && *PN == '\\')
558 ++PI; // increment once, the for loop will move over the escaped slash
566 std::string convert_to_slash(StringRef path, Style style) {
567 if (real_style(style) != Style::windows)
570 std::string s = path.str();
571 std::replace(s.begin(), s.end(), '\\', '/');
575 StringRef filename(StringRef path, Style style) { return *rbegin(path, style); }
577 StringRef stem(StringRef path, Style style) {
578 StringRef fname = filename(path, style);
579 size_t pos = fname.find_last_of('.');
580 if (pos == StringRef::npos)
583 if ((fname.size() == 1 && fname == ".") ||
584 (fname.size() == 2 && fname == ".."))
587 return fname.substr(0, pos);
590 StringRef extension(StringRef path, Style style) {
591 StringRef fname = filename(path, style);
592 size_t pos = fname.find_last_of('.');
593 if (pos == StringRef::npos)
596 if ((fname.size() == 1 && fname == ".") ||
597 (fname.size() == 2 && fname == ".."))
600 return fname.substr(pos);
603 bool is_separator(char value, Style style) {
606 if (real_style(style) == Style::windows)
607 return value == '\\';
611 StringRef get_separator(Style style) {
612 if (real_style(style) == Style::windows)
617 bool has_root_name(const Twine &path, Style style) {
618 SmallString<128> path_storage;
619 StringRef p = path.toStringRef(path_storage);
621 return !root_name(p, style).empty();
624 bool has_root_directory(const Twine &path, Style style) {
625 SmallString<128> path_storage;
626 StringRef p = path.toStringRef(path_storage);
628 return !root_directory(p, style).empty();
631 bool has_root_path(const Twine &path, Style style) {
632 SmallString<128> path_storage;
633 StringRef p = path.toStringRef(path_storage);
635 return !root_path(p, style).empty();
638 bool has_relative_path(const Twine &path, Style style) {
639 SmallString<128> path_storage;
640 StringRef p = path.toStringRef(path_storage);
642 return !relative_path(p, style).empty();
645 bool has_filename(const Twine &path, Style style) {
646 SmallString<128> path_storage;
647 StringRef p = path.toStringRef(path_storage);
649 return !filename(p, style).empty();
652 bool has_parent_path(const Twine &path, Style style) {
653 SmallString<128> path_storage;
654 StringRef p = path.toStringRef(path_storage);
656 return !parent_path(p, style).empty();
659 bool has_stem(const Twine &path, Style style) {
660 SmallString<128> path_storage;
661 StringRef p = path.toStringRef(path_storage);
663 return !stem(p, style).empty();
666 bool has_extension(const Twine &path, Style style) {
667 SmallString<128> path_storage;
668 StringRef p = path.toStringRef(path_storage);
670 return !extension(p, style).empty();
673 bool is_absolute(const Twine &path, Style style) {
674 SmallString<128> path_storage;
675 StringRef p = path.toStringRef(path_storage);
677 bool rootDir = has_root_directory(p, style);
679 (real_style(style) != Style::windows) || has_root_name(p, style);
681 return rootDir && rootName;
684 bool is_relative(const Twine &path, Style style) {
685 return !is_absolute(path, style);
688 StringRef remove_leading_dotslash(StringRef Path, Style style) {
689 // Remove leading "./" (or ".//" or "././" etc.)
690 while (Path.size() > 2 && Path[0] == '.' && is_separator(Path[1], style)) {
691 Path = Path.substr(2);
692 while (Path.size() > 0 && is_separator(Path[0], style))
693 Path = Path.substr(1);
698 static SmallString<256> remove_dots(StringRef path, bool remove_dot_dot,
700 SmallVector<StringRef, 16> components;
702 // Skip the root path, then look for traversal in the components.
703 StringRef rel = path::relative_path(path, style);
705 llvm::make_range(path::begin(rel, style), path::end(rel))) {
708 // Leading ".." will remain in the path unless it's at the root.
709 if (remove_dot_dot && C == "..") {
710 if (!components.empty() && components.back() != "..") {
711 components.pop_back();
714 if (path::is_absolute(path, style))
717 components.push_back(C);
720 SmallString<256> buffer = path::root_path(path, style);
721 for (StringRef C : components)
722 path::append(buffer, style, C);
726 bool remove_dots(SmallVectorImpl<char> &path, bool remove_dot_dot,
728 StringRef p(path.data(), path.size());
730 SmallString<256> result = remove_dots(p, remove_dot_dot, style);
738 } // end namespace path
742 std::error_code getUniqueID(const Twine Path, UniqueID &Result) {
744 std::error_code EC = status(Path, Status);
747 Result = Status.getUniqueID();
748 return std::error_code();
751 std::error_code createUniqueFile(const Twine &Model, int &ResultFd,
752 SmallVectorImpl<char> &ResultPath,
754 return createUniqueEntity(Model, ResultFd, ResultPath, false, Mode, FS_File);
757 std::error_code createUniqueFile(const Twine &Model,
758 SmallVectorImpl<char> &ResultPath) {
760 return createUniqueEntity(Model, Dummy, ResultPath, false, 0, FS_Name);
763 static std::error_code
764 createTemporaryFile(const Twine &Model, int &ResultFD,
765 llvm::SmallVectorImpl<char> &ResultPath, FSEntity Type) {
766 SmallString<128> Storage;
767 StringRef P = Model.toNullTerminatedStringRef(Storage);
768 assert(P.find_first_of(separators(Style::native)) == StringRef::npos &&
769 "Model must be a simple filename.");
770 // Use P.begin() so that createUniqueEntity doesn't need to recreate Storage.
771 return createUniqueEntity(P.begin(), ResultFD, ResultPath,
772 true, owner_read | owner_write, Type);
775 static std::error_code
776 createTemporaryFile(const Twine &Prefix, StringRef Suffix, int &ResultFD,
777 llvm::SmallVectorImpl<char> &ResultPath, FSEntity Type) {
778 const char *Middle = Suffix.empty() ? "-%%%%%%" : "-%%%%%%.";
779 return createTemporaryFile(Prefix + Middle + Suffix, ResultFD, ResultPath,
783 std::error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix,
785 SmallVectorImpl<char> &ResultPath) {
786 return createTemporaryFile(Prefix, Suffix, ResultFD, ResultPath, FS_File);
789 std::error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix,
790 SmallVectorImpl<char> &ResultPath) {
792 return createTemporaryFile(Prefix, Suffix, Dummy, ResultPath, FS_Name);
796 // This is a mkdtemp with a different pattern. We use createUniqueEntity mostly
797 // for consistency. We should try using mkdtemp.
798 std::error_code createUniqueDirectory(const Twine &Prefix,
799 SmallVectorImpl<char> &ResultPath) {
801 return createUniqueEntity(Prefix + "-%%%%%%", Dummy, ResultPath,
805 static std::error_code make_absolute(const Twine ¤t_directory,
806 SmallVectorImpl<char> &path,
807 bool use_current_directory) {
808 StringRef p(path.data(), path.size());
810 bool rootDirectory = path::has_root_directory(p);
812 (real_style(Style::native) != Style::windows) || path::has_root_name(p);
815 if (rootName && rootDirectory)
816 return std::error_code();
818 // All of the following conditions will need the current directory.
819 SmallString<128> current_dir;
820 if (use_current_directory)
821 current_directory.toVector(current_dir);
822 else if (std::error_code ec = current_path(current_dir))
825 // Relative path. Prepend the current directory.
826 if (!rootName && !rootDirectory) {
827 // Append path to the current directory.
828 path::append(current_dir, p);
829 // Set path to the result.
830 path.swap(current_dir);
831 return std::error_code();
834 if (!rootName && rootDirectory) {
835 StringRef cdrn = path::root_name(current_dir);
836 SmallString<128> curDirRootName(cdrn.begin(), cdrn.end());
837 path::append(curDirRootName, p);
838 // Set path to the result.
839 path.swap(curDirRootName);
840 return std::error_code();
843 if (rootName && !rootDirectory) {
844 StringRef pRootName = path::root_name(p);
845 StringRef bRootDirectory = path::root_directory(current_dir);
846 StringRef bRelativePath = path::relative_path(current_dir);
847 StringRef pRelativePath = path::relative_path(p);
849 SmallString<128> res;
850 path::append(res, pRootName, bRootDirectory, bRelativePath, pRelativePath);
852 return std::error_code();
855 llvm_unreachable("All rootName and rootDirectory combinations should have "
859 std::error_code make_absolute(const Twine ¤t_directory,
860 SmallVectorImpl<char> &path) {
861 return make_absolute(current_directory, path, true);
864 std::error_code make_absolute(SmallVectorImpl<char> &path) {
865 return make_absolute(Twine(), path, false);
868 std::error_code create_directories(const Twine &Path, bool IgnoreExisting,
870 SmallString<128> PathStorage;
871 StringRef P = Path.toStringRef(PathStorage);
873 // Be optimistic and try to create the directory
874 std::error_code EC = create_directory(P, IgnoreExisting, Perms);
875 // If we succeeded, or had any error other than the parent not existing, just
877 if (EC != errc::no_such_file_or_directory)
880 // We failed because of a no_such_file_or_directory, try to create the
882 StringRef Parent = path::parent_path(P);
886 if ((EC = create_directories(Parent, IgnoreExisting, Perms)))
889 return create_directory(P, IgnoreExisting, Perms);
892 std::error_code copy_file(const Twine &From, const Twine &To) {
894 if (std::error_code EC = openFileForRead(From, ReadFD))
896 if (std::error_code EC = openFileForWrite(To, WriteFD, F_None)) {
901 const size_t BufSize = 4096;
902 char *Buf = new char[BufSize];
903 int BytesRead = 0, BytesWritten = 0;
905 BytesRead = read(ReadFD, Buf, BufSize);
909 BytesWritten = write(WriteFD, Buf, BytesRead);
910 if (BytesWritten < 0)
912 BytesRead -= BytesWritten;
914 if (BytesWritten < 0)
921 if (BytesRead < 0 || BytesWritten < 0)
922 return std::error_code(errno, std::generic_category());
923 return std::error_code();
926 ErrorOr<MD5::MD5Result> md5_contents(int FD) {
929 constexpr size_t BufSize = 4096;
930 std::vector<uint8_t> Buf(BufSize);
933 BytesRead = read(FD, Buf.data(), BufSize);
936 Hash.update(makeArrayRef(Buf.data(), BytesRead));
940 return std::error_code(errno, std::generic_category());
941 MD5::MD5Result Result;
946 ErrorOr<MD5::MD5Result> md5_contents(const Twine &Path) {
948 if (auto EC = openFileForRead(Path, FD))
951 auto Result = md5_contents(FD);
956 bool exists(file_status status) {
957 return status_known(status) && status.type() != file_type::file_not_found;
960 bool status_known(file_status s) {
961 return s.type() != file_type::status_error;
964 file_type get_file_type(const Twine &Path, bool Follow) {
966 if (status(Path, st, Follow))
967 return file_type::status_error;
971 bool is_directory(file_status status) {
972 return status.type() == file_type::directory_file;
975 std::error_code is_directory(const Twine &path, bool &result) {
977 if (std::error_code ec = status(path, st))
979 result = is_directory(st);
980 return std::error_code();
983 bool is_regular_file(file_status status) {
984 return status.type() == file_type::regular_file;
987 std::error_code is_regular_file(const Twine &path, bool &result) {
989 if (std::error_code ec = status(path, st))
991 result = is_regular_file(st);
992 return std::error_code();
995 bool is_symlink_file(file_status status) {
996 return status.type() == file_type::symlink_file;
999 std::error_code is_symlink_file(const Twine &path, bool &result) {
1001 if (std::error_code ec = status(path, st, false))
1003 result = is_symlink_file(st);
1004 return std::error_code();
1007 bool is_other(file_status status) {
1008 return exists(status) &&
1009 !is_regular_file(status) &&
1010 !is_directory(status);
1013 std::error_code is_other(const Twine &Path, bool &Result) {
1014 file_status FileStatus;
1015 if (std::error_code EC = status(Path, FileStatus))
1017 Result = is_other(FileStatus);
1018 return std::error_code();
1021 void directory_entry::replace_filename(const Twine &filename, file_status st) {
1022 SmallString<128> path = path::parent_path(Path);
1023 path::append(path, filename);
1028 std::error_code directory_entry::status(file_status &result) const {
1029 return fs::status(Path, result, FollowSymlinks);
1032 ErrorOr<perms> getPermissions(const Twine &Path) {
1034 if (std::error_code EC = status(Path, Status))
1037 return Status.permissions();
1040 } // end namespace fs
1041 } // end namespace sys
1042 } // end namespace llvm
1044 // Include the truly platform-specific parts.
1045 #if defined(LLVM_ON_UNIX)
1046 #include "Unix/Path.inc"
1048 #if defined(LLVM_ON_WIN32)
1049 #include "Windows/Path.inc"
1056 bool user_cache_directory(SmallVectorImpl<char> &Result, const Twine &Path1,
1057 const Twine &Path2, const Twine &Path3) {
1058 if (getUserCacheDir(Result)) {
1059 append(Result, Path1, Path2, Path3);
1065 } // end namespace path
1066 } // end namsspace sys
1067 } // end namespace llvm