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/Errc.h"
15 #include "llvm/Support/Path.h"
16 #include "llvm/Support/Endian.h"
17 #include "llvm/Support/ErrorHandling.h"
18 #include "llvm/Support/FileSystem.h"
19 #include "llvm/Support/Process.h"
25 #if !defined(_MSC_VER) && !defined(__MINGW32__)
34 using llvm::StringRef;
35 using llvm::sys::path::is_separator;
38 const char *separators = "\\/";
39 const char preferred_separator = '\\';
41 const char separators = '/';
42 const char preferred_separator = '/';
45 StringRef find_first_component(StringRef path) {
46 // Look for this first component in the following order.
47 // * empty (in this case we return an empty string)
48 // * either C: or {//,\\}net.
51 // * {file,directory}name
58 if (path.size() >= 2 && std::isalpha(static_cast<unsigned char>(path[0])) &&
60 return path.substr(0, 2);
64 if ((path.size() > 2) &&
65 is_separator(path[0]) &&
67 !is_separator(path[2])) {
68 // Find the next directory separator.
69 size_t end = path.find_first_of(separators, 2);
70 return path.substr(0, end);
74 if (is_separator(path[0]))
75 return path.substr(0, 1);
77 if (path.startswith(".."))
78 return path.substr(0, 2);
81 return path.substr(0, 1);
83 // * {file,directory}name
84 size_t end = path.find_first_of(separators);
85 return path.substr(0, end);
88 size_t filename_pos(StringRef str) {
89 if (str.size() == 2 &&
90 is_separator(str[0]) &&
94 if (str.size() > 0 && is_separator(str[str.size() - 1]))
95 return str.size() - 1;
97 size_t pos = str.find_last_of(separators, str.size() - 1);
100 if (pos == StringRef::npos)
101 pos = str.find_last_of(':', str.size() - 2);
104 if (pos == StringRef::npos ||
105 (pos == 1 && is_separator(str[0])))
111 size_t root_dir_start(StringRef str) {
114 if (str.size() > 2 &&
116 is_separator(str[2]))
121 if (str.size() == 2 &&
122 is_separator(str[0]) &&
124 return StringRef::npos;
127 if (str.size() > 3 &&
128 is_separator(str[0]) &&
130 !is_separator(str[2])) {
131 return str.find_first_of(separators, 2);
135 if (str.size() > 0 && is_separator(str[0]))
138 return StringRef::npos;
141 size_t parent_path_end(StringRef path) {
142 size_t end_pos = filename_pos(path);
144 bool filename_was_sep = path.size() > 0 && is_separator(path[end_pos]);
146 // Skip separators except for root dir.
147 size_t root_dir_pos = root_dir_start(path.substr(0, end_pos));
150 (end_pos - 1) != root_dir_pos &&
151 is_separator(path[end_pos - 1]))
154 if (end_pos == 1 && root_dir_pos == 0 && filename_was_sep)
155 return StringRef::npos;
159 } // end unnamed namespace
167 static std::error_code createUniqueEntity(const Twine &Model, int &ResultFD,
168 SmallVectorImpl<char> &ResultPath,
169 bool MakeAbsolute, unsigned Mode,
171 SmallString<128> ModelStorage;
172 Model.toVector(ModelStorage);
175 // Make model absolute by prepending a temp directory if it's not already.
176 if (!sys::path::is_absolute(Twine(ModelStorage))) {
177 SmallString<128> TDir;
178 sys::path::system_temp_directory(true, TDir);
179 sys::path::append(TDir, Twine(ModelStorage));
180 ModelStorage.swap(TDir);
184 // From here on, DO NOT modify model. It may be needed if the randomly chosen
185 // path already exists.
186 ResultPath = ModelStorage;
188 ResultPath.push_back(0);
189 ResultPath.pop_back();
192 // Replace '%' with random chars.
193 for (unsigned i = 0, e = ModelStorage.size(); i != e; ++i) {
194 if (ModelStorage[i] == '%')
195 ResultPath[i] = "0123456789abcdef"[sys::Process::GetRandomNumber() & 15];
198 // Try to open + create the file.
201 if (std::error_code EC =
202 sys::fs::openFileForWrite(Twine(ResultPath.begin()), ResultFD,
203 sys::fs::F_RW | sys::fs::F_Excl, Mode)) {
204 if (EC == errc::file_exists)
205 goto retry_random_path;
209 return std::error_code();
214 std::error_code EC = sys::fs::exists(ResultPath.begin(), Exists);
218 goto retry_random_path;
219 return std::error_code();
223 if (std::error_code EC =
224 sys::fs::create_directory(ResultPath.begin(), false)) {
225 if (EC == errc::file_exists)
226 goto retry_random_path;
229 return std::error_code();
232 llvm_unreachable("Invalid Type");
239 const_iterator begin(StringRef path) {
242 i.Component = find_first_component(path);
247 const_iterator end(StringRef path) {
250 i.Position = path.size();
254 const_iterator &const_iterator::operator++() {
255 assert(Position < Path.size() && "Tried to increment past end!");
257 // Increment Position to past the current component
258 Position += Component.size();
261 if (Position == Path.size()) {
262 Component = StringRef();
266 // Both POSIX and Windows treat paths that begin with exactly two separators
268 bool was_net = Component.size() > 2 &&
269 is_separator(Component[0]) &&
270 Component[1] == Component[0] &&
271 !is_separator(Component[2]);
273 // Handle separators.
274 if (is_separator(Path[Position])) {
279 || Component.endswith(":")
282 Component = Path.substr(Position, 1);
286 // Skip extra separators.
287 while (Position != Path.size() &&
288 is_separator(Path[Position])) {
292 // Treat trailing '/' as a '.'.
293 if (Position == Path.size()) {
300 // Find next component.
301 size_t end_pos = Path.find_first_of(separators, Position);
302 Component = Path.slice(Position, end_pos);
307 bool const_iterator::operator==(const const_iterator &RHS) const {
308 return Path.begin() == RHS.Path.begin() && Position == RHS.Position;
311 ptrdiff_t const_iterator::operator-(const const_iterator &RHS) const {
312 return Position - RHS.Position;
315 reverse_iterator rbegin(StringRef Path) {
318 I.Position = Path.size();
322 reverse_iterator rend(StringRef Path) {
325 I.Component = Path.substr(0, 0);
330 reverse_iterator &reverse_iterator::operator++() {
331 // If we're at the end and the previous char was a '/', return '.' unless
332 // we are the root path.
333 size_t root_dir_pos = root_dir_start(Path);
334 if (Position == Path.size() &&
335 Path.size() > root_dir_pos + 1 &&
336 is_separator(Path[Position - 1])) {
342 // Skip separators unless it's the root directory.
343 size_t end_pos = Position;
346 (end_pos - 1) != root_dir_pos &&
347 is_separator(Path[end_pos - 1]))
350 // Find next separator.
351 size_t start_pos = filename_pos(Path.substr(0, end_pos));
352 Component = Path.slice(start_pos, end_pos);
353 Position = start_pos;
357 bool reverse_iterator::operator==(const reverse_iterator &RHS) const {
358 return Path.begin() == RHS.Path.begin() && Component == RHS.Component &&
359 Position == RHS.Position;
362 StringRef root_path(StringRef path) {
363 const_iterator b = begin(path),
367 bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
375 if (has_net || has_drive) {
376 if ((++pos != e) && is_separator((*pos)[0])) {
377 // {C:/,//net/}, so get the first two components.
378 return path.substr(0, b->size() + pos->size());
380 // just {C:,//net}, return the first component.
385 // POSIX style root directory.
386 if (is_separator((*b)[0])) {
394 StringRef root_name(StringRef path) {
395 const_iterator b = begin(path),
398 bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
406 if (has_net || has_drive) {
407 // just {C:,//net}, return the first component.
412 // No path or no name.
416 StringRef root_directory(StringRef path) {
417 const_iterator b = begin(path),
421 bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
429 if ((has_net || has_drive) &&
430 // {C:,//net}, skip to the next component.
431 (++pos != e) && is_separator((*pos)[0])) {
435 // POSIX style root directory.
436 if (!has_net && is_separator((*b)[0])) {
441 // No path or no root.
445 StringRef relative_path(StringRef path) {
446 StringRef root = root_path(path);
447 return path.substr(root.size());
450 void append(SmallVectorImpl<char> &path, const Twine &a,
454 SmallString<32> a_storage;
455 SmallString<32> b_storage;
456 SmallString<32> c_storage;
457 SmallString<32> d_storage;
459 SmallVector<StringRef, 4> components;
460 if (!a.isTriviallyEmpty()) components.push_back(a.toStringRef(a_storage));
461 if (!b.isTriviallyEmpty()) components.push_back(b.toStringRef(b_storage));
462 if (!c.isTriviallyEmpty()) components.push_back(c.toStringRef(c_storage));
463 if (!d.isTriviallyEmpty()) components.push_back(d.toStringRef(d_storage));
465 for (SmallVectorImpl<StringRef>::const_iterator i = components.begin(),
466 e = components.end();
468 bool path_has_sep = !path.empty() && is_separator(path[path.size() - 1]);
469 bool component_has_sep = !i->empty() && is_separator((*i)[0]);
470 bool is_root_name = has_root_name(*i);
473 // Strip separators from beginning of component.
474 size_t loc = i->find_first_not_of(separators);
475 StringRef c = i->substr(loc);
478 path.append(c.begin(), c.end());
482 if (!component_has_sep && !(path.empty() || is_root_name)) {
484 path.push_back(preferred_separator);
487 path.append(i->begin(), i->end());
491 void append(SmallVectorImpl<char> &path,
492 const_iterator begin, const_iterator end) {
493 for (; begin != end; ++begin)
494 path::append(path, *begin);
497 StringRef parent_path(StringRef path) {
498 size_t end_pos = parent_path_end(path);
499 if (end_pos == StringRef::npos)
502 return path.substr(0, end_pos);
505 void remove_filename(SmallVectorImpl<char> &path) {
506 size_t end_pos = parent_path_end(StringRef(path.begin(), path.size()));
507 if (end_pos != StringRef::npos)
508 path.set_size(end_pos);
511 void replace_extension(SmallVectorImpl<char> &path, const Twine &extension) {
512 StringRef p(path.begin(), path.size());
513 SmallString<32> ext_storage;
514 StringRef ext = extension.toStringRef(ext_storage);
516 // Erase existing extension.
517 size_t pos = p.find_last_of('.');
518 if (pos != StringRef::npos && pos >= filename_pos(p))
521 // Append '.' if needed.
522 if (ext.size() > 0 && ext[0] != '.')
526 path.append(ext.begin(), ext.end());
529 void native(const Twine &path, SmallVectorImpl<char> &result) {
530 assert((!path.isSingleStringRef() ||
531 path.getSingleStringRef().data() != result.data()) &&
532 "path and result are not allowed to overlap!");
535 path.toVector(result);
539 void native(SmallVectorImpl<char> &Path) {
541 std::replace(Path.begin(), Path.end(), '/', '\\');
543 for (auto PI = Path.begin(), PE = Path.end(); PI < PE; ++PI) {
546 if (PN < PE && *PN == '\\')
547 ++PI; // increment once, the for loop will move over the escaped slash
555 StringRef filename(StringRef path) {
556 return *rbegin(path);
559 StringRef stem(StringRef path) {
560 StringRef fname = filename(path);
561 size_t pos = fname.find_last_of('.');
562 if (pos == StringRef::npos)
565 if ((fname.size() == 1 && fname == ".") ||
566 (fname.size() == 2 && fname == ".."))
569 return fname.substr(0, pos);
572 StringRef extension(StringRef path) {
573 StringRef fname = filename(path);
574 size_t pos = fname.find_last_of('.');
575 if (pos == StringRef::npos)
578 if ((fname.size() == 1 && fname == ".") ||
579 (fname.size() == 2 && fname == ".."))
582 return fname.substr(pos);
585 bool is_separator(char value) {
588 case '\\': // fall through
590 case '/': return true;
591 default: return false;
595 static const char preferred_separator_string[] = { preferred_separator, '\0' };
597 StringRef get_separator() {
598 return preferred_separator_string;
601 bool has_root_name(const Twine &path) {
602 SmallString<128> path_storage;
603 StringRef p = path.toStringRef(path_storage);
605 return !root_name(p).empty();
608 bool has_root_directory(const Twine &path) {
609 SmallString<128> path_storage;
610 StringRef p = path.toStringRef(path_storage);
612 return !root_directory(p).empty();
615 bool has_root_path(const Twine &path) {
616 SmallString<128> path_storage;
617 StringRef p = path.toStringRef(path_storage);
619 return !root_path(p).empty();
622 bool has_relative_path(const Twine &path) {
623 SmallString<128> path_storage;
624 StringRef p = path.toStringRef(path_storage);
626 return !relative_path(p).empty();
629 bool has_filename(const Twine &path) {
630 SmallString<128> path_storage;
631 StringRef p = path.toStringRef(path_storage);
633 return !filename(p).empty();
636 bool has_parent_path(const Twine &path) {
637 SmallString<128> path_storage;
638 StringRef p = path.toStringRef(path_storage);
640 return !parent_path(p).empty();
643 bool has_stem(const Twine &path) {
644 SmallString<128> path_storage;
645 StringRef p = path.toStringRef(path_storage);
647 return !stem(p).empty();
650 bool has_extension(const Twine &path) {
651 SmallString<128> path_storage;
652 StringRef p = path.toStringRef(path_storage);
654 return !extension(p).empty();
657 bool is_absolute(const Twine &path) {
658 SmallString<128> path_storage;
659 StringRef p = path.toStringRef(path_storage);
661 bool rootDir = has_root_directory(p),
663 rootName = has_root_name(p);
668 return rootDir && rootName;
671 bool is_relative(const Twine &path) {
672 return !is_absolute(path);
675 } // end namespace path
679 std::error_code getUniqueID(const Twine Path, UniqueID &Result) {
681 std::error_code EC = status(Path, Status);
684 Result = Status.getUniqueID();
685 return std::error_code();
688 std::error_code createUniqueFile(const Twine &Model, int &ResultFd,
689 SmallVectorImpl<char> &ResultPath,
691 return createUniqueEntity(Model, ResultFd, ResultPath, false, Mode, FS_File);
694 std::error_code createUniqueFile(const Twine &Model,
695 SmallVectorImpl<char> &ResultPath) {
697 return createUniqueEntity(Model, Dummy, ResultPath, false, 0, FS_Name);
700 static std::error_code
701 createTemporaryFile(const Twine &Model, int &ResultFD,
702 llvm::SmallVectorImpl<char> &ResultPath, FSEntity Type) {
703 SmallString<128> Storage;
704 StringRef P = Model.toNullTerminatedStringRef(Storage);
705 assert(P.find_first_of(separators) == StringRef::npos &&
706 "Model must be a simple filename.");
707 // Use P.begin() so that createUniqueEntity doesn't need to recreate Storage.
708 return createUniqueEntity(P.begin(), ResultFD, ResultPath,
709 true, owner_read | owner_write, Type);
712 static std::error_code
713 createTemporaryFile(const Twine &Prefix, StringRef Suffix, int &ResultFD,
714 llvm::SmallVectorImpl<char> &ResultPath, FSEntity Type) {
715 const char *Middle = Suffix.empty() ? "-%%%%%%" : "-%%%%%%.";
716 return createTemporaryFile(Prefix + Middle + Suffix, ResultFD, ResultPath,
720 std::error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix,
722 SmallVectorImpl<char> &ResultPath) {
723 return createTemporaryFile(Prefix, Suffix, ResultFD, ResultPath, FS_File);
726 std::error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix,
727 SmallVectorImpl<char> &ResultPath) {
729 return createTemporaryFile(Prefix, Suffix, Dummy, ResultPath, FS_Name);
733 // This is a mkdtemp with a different pattern. We use createUniqueEntity mostly
734 // for consistency. We should try using mkdtemp.
735 std::error_code createUniqueDirectory(const Twine &Prefix,
736 SmallVectorImpl<char> &ResultPath) {
738 return createUniqueEntity(Prefix + "-%%%%%%", Dummy, ResultPath,
742 std::error_code make_absolute(SmallVectorImpl<char> &path) {
743 StringRef p(path.data(), path.size());
745 bool rootDirectory = path::has_root_directory(p),
747 rootName = path::has_root_name(p);
753 if (rootName && rootDirectory)
754 return std::error_code();
756 // All of the following conditions will need the current directory.
757 SmallString<128> current_dir;
758 if (std::error_code ec = current_path(current_dir))
761 // Relative path. Prepend the current directory.
762 if (!rootName && !rootDirectory) {
763 // Append path to the current directory.
764 path::append(current_dir, p);
765 // Set path to the result.
766 path.swap(current_dir);
767 return std::error_code();
770 if (!rootName && rootDirectory) {
771 StringRef cdrn = path::root_name(current_dir);
772 SmallString<128> curDirRootName(cdrn.begin(), cdrn.end());
773 path::append(curDirRootName, p);
774 // Set path to the result.
775 path.swap(curDirRootName);
776 return std::error_code();
779 if (rootName && !rootDirectory) {
780 StringRef pRootName = path::root_name(p);
781 StringRef bRootDirectory = path::root_directory(current_dir);
782 StringRef bRelativePath = path::relative_path(current_dir);
783 StringRef pRelativePath = path::relative_path(p);
785 SmallString<128> res;
786 path::append(res, pRootName, bRootDirectory, bRelativePath, pRelativePath);
788 return std::error_code();
791 llvm_unreachable("All rootName and rootDirectory combinations should have "
795 std::error_code create_directories(const Twine &Path, bool IgnoreExisting) {
796 SmallString<128> PathStorage;
797 StringRef P = Path.toStringRef(PathStorage);
799 // Be optimistic and try to create the directory
800 std::error_code EC = create_directory(P, IgnoreExisting);
801 // If we succeeded, or had any error other than the parent not existing, just
803 if (EC != errc::no_such_file_or_directory)
806 // We failed because of a no_such_file_or_directory, try to create the
808 StringRef Parent = path::parent_path(P);
812 if ((EC = create_directories(Parent)))
815 return create_directory(P, IgnoreExisting);
818 std::error_code copy_file(const Twine &From, const Twine &To) {
820 if (std::error_code EC = openFileForRead(From, ReadFD))
822 if (std::error_code EC = openFileForWrite(To, WriteFD, F_None)) {
827 const size_t BufSize = 4096;
828 char *Buf = new char[BufSize];
829 int BytesRead = 0, BytesWritten = 0;
831 BytesRead = read(ReadFD, Buf, BufSize);
835 BytesWritten = write(WriteFD, Buf, BytesRead);
836 if (BytesWritten < 0)
838 BytesRead -= BytesWritten;
840 if (BytesWritten < 0)
847 if (BytesRead < 0 || BytesWritten < 0)
848 return std::error_code(errno, std::generic_category());
849 return std::error_code();
852 bool exists(file_status status) {
853 return status_known(status) && status.type() != file_type::file_not_found;
856 bool status_known(file_status s) {
857 return s.type() != file_type::status_error;
860 bool is_directory(file_status status) {
861 return status.type() == file_type::directory_file;
864 std::error_code is_directory(const Twine &path, bool &result) {
866 if (std::error_code ec = status(path, st))
868 result = is_directory(st);
869 return std::error_code();
872 bool is_regular_file(file_status status) {
873 return status.type() == file_type::regular_file;
876 std::error_code is_regular_file(const Twine &path, bool &result) {
878 if (std::error_code ec = status(path, st))
880 result = is_regular_file(st);
881 return std::error_code();
884 bool is_other(file_status status) {
885 return exists(status) &&
886 !is_regular_file(status) &&
887 !is_directory(status);
890 void directory_entry::replace_filename(const Twine &filename, file_status st) {
891 SmallString<128> path(Path.begin(), Path.end());
892 path::remove_filename(path);
893 path::append(path, filename);
898 /// @brief Identify the magic in magic.
899 file_magic identify_magic(StringRef Magic) {
900 if (Magic.size() < 4)
901 return file_magic::unknown;
902 switch ((unsigned char)Magic[0]) {
904 // COFF short import library file
905 if (Magic[1] == (char)0x00 && Magic[2] == (char)0xff &&
906 Magic[3] == (char)0xff)
907 return file_magic::coff_import_library;
908 // Windows resource file
909 const char Expected[] = { 0, 0, 0, 0, '\x20', 0, 0, 0, '\xff' };
910 if (Magic.size() >= sizeof(Expected) &&
911 memcmp(Magic.data(), Expected, sizeof(Expected)) == 0)
912 return file_magic::windows_resource;
913 // 0x0000 = COFF unknown machine type
915 return file_magic::coff_object;
918 case 0xDE: // 0x0B17C0DE = BC wraper
919 if (Magic[1] == (char)0xC0 && Magic[2] == (char)0x17 &&
920 Magic[3] == (char)0x0B)
921 return file_magic::bitcode;
924 if (Magic[1] == 'C' && Magic[2] == (char)0xC0 && Magic[3] == (char)0xDE)
925 return file_magic::bitcode;
928 if (Magic.size() >= 8)
929 if (memcmp(Magic.data(),"!<arch>\n",8) == 0)
930 return file_magic::archive;
934 if (Magic.size() >= 18 && Magic[1] == 'E' && Magic[2] == 'L' &&
936 bool Data2MSB = Magic[5] == 2;
937 unsigned high = Data2MSB ? 16 : 17;
938 unsigned low = Data2MSB ? 17 : 16;
939 if (Magic[high] == 0)
940 switch (Magic[low]) {
942 case 1: return file_magic::elf_relocatable;
943 case 2: return file_magic::elf_executable;
944 case 3: return file_magic::elf_shared_object;
945 case 4: return file_magic::elf_core;
951 if (Magic[1] == char(0xFE) && Magic[2] == char(0xBA) &&
952 Magic[3] == char(0xBE)) {
953 // This is complicated by an overlap with Java class files.
954 // See the Mach-O section in /usr/share/file/magic for details.
955 if (Magic.size() >= 8 && Magic[7] < 43)
956 return file_magic::macho_universal_binary;
960 // The two magic numbers for mach-o are:
961 // 0xfeedface - 32-bit mach-o
962 // 0xfeedfacf - 64-bit mach-o
967 if (Magic[0] == char(0xFE) && Magic[1] == char(0xED) &&
968 Magic[2] == char(0xFA) &&
969 (Magic[3] == char(0xCE) || Magic[3] == char(0xCF))) {
971 if (Magic.size() >= 16) type = Magic[14] << 8 | Magic[15];
972 } else if ((Magic[0] == char(0xCE) || Magic[0] == char(0xCF)) &&
973 Magic[1] == char(0xFA) && Magic[2] == char(0xED) &&
974 Magic[3] == char(0xFE)) {
976 if (Magic.size() >= 14) type = Magic[13] << 8 | Magic[12];
980 case 1: return file_magic::macho_object;
981 case 2: return file_magic::macho_executable;
982 case 3: return file_magic::macho_fixed_virtual_memory_shared_lib;
983 case 4: return file_magic::macho_core;
984 case 5: return file_magic::macho_preload_executable;
985 case 6: return file_magic::macho_dynamically_linked_shared_lib;
986 case 7: return file_magic::macho_dynamic_linker;
987 case 8: return file_magic::macho_bundle;
988 case 9: return file_magic::macho_dynamic_linker;
989 case 10: return file_magic::macho_dsym_companion;
993 case 0xF0: // PowerPC Windows
994 case 0x83: // Alpha 32-bit
995 case 0x84: // Alpha 64-bit
996 case 0x66: // MPS R4000 Windows
998 case 0x4c: // 80386 Windows
999 case 0xc4: // ARMNT Windows
1000 if (Magic[1] == 0x01)
1001 return file_magic::coff_object;
1003 case 0x90: // PA-RISC Windows
1004 case 0x68: // mc68K Windows
1005 if (Magic[1] == 0x02)
1006 return file_magic::coff_object;
1009 case 0x4d: // Possible MS-DOS stub on Windows PE file
1010 if (Magic[1] == 0x5a) {
1012 *reinterpret_cast<const support::ulittle32_t*>(Magic.data() + 0x3c);
1013 // PE/COFF file, either EXE or DLL.
1014 if (off < Magic.size() && memcmp(Magic.data() + off, "PE\0\0",4) == 0)
1015 return file_magic::pecoff_executable;
1019 case 0x64: // x86-64 Windows.
1020 if (Magic[1] == char(0x86))
1021 return file_magic::coff_object;
1027 return file_magic::unknown;
1030 std::error_code identify_magic(const Twine &Path, file_magic &Result) {
1032 if (std::error_code EC = openFileForRead(Path, FD))
1036 int Length = read(FD, Buffer, sizeof(Buffer));
1037 if (close(FD) != 0 || Length < 0)
1038 return std::error_code(errno, std::generic_category());
1040 Result = identify_magic(StringRef(Buffer, Length));
1041 return std::error_code();
1044 std::error_code directory_entry::status(file_status &result) const {
1045 return fs::status(Path, result);
1048 } // end namespace fs
1049 } // end namespace sys
1050 } // end namespace llvm
1052 // Include the truly platform-specific parts.
1053 #if defined(LLVM_ON_UNIX)
1054 #include "Unix/Path.inc"
1056 #if defined(LLVM_ON_WIN32)
1057 #include "Windows/Path.inc"