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/Support/Endian.h"
16 #include "llvm/Support/ErrorHandling.h"
17 #include "llvm/Support/FileSystem.h"
18 #include "llvm/Support/Process.h"
24 #if !defined(_MSC_VER) && !defined(__MINGW32__)
31 using std::error_code;
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 // Implemented in Unix/Path.inc and Windows/Path.inc.
168 static error_code TempDir(SmallVectorImpl<char> &result);
170 static error_code createUniqueEntity(const Twine &Model, int &ResultFD,
171 SmallVectorImpl<char> &ResultPath,
172 bool MakeAbsolute, unsigned Mode,
174 SmallString<128> ModelStorage;
175 Model.toVector(ModelStorage);
178 // Make model absolute by prepending a temp directory if it's not already.
179 if (!sys::path::is_absolute(Twine(ModelStorage))) {
180 SmallString<128> TDir;
181 if (error_code EC = TempDir(TDir))
183 sys::path::append(TDir, Twine(ModelStorage));
184 ModelStorage.swap(TDir);
188 // From here on, DO NOT modify model. It may be needed if the randomly chosen
189 // path already exists.
190 ResultPath = ModelStorage;
192 ResultPath.push_back(0);
193 ResultPath.pop_back();
196 // Replace '%' with random chars.
197 for (unsigned i = 0, e = ModelStorage.size(); i != e; ++i) {
198 if (ModelStorage[i] == '%')
199 ResultPath[i] = "0123456789abcdef"[sys::Process::GetRandomNumber() & 15];
202 // Try to open + create the file.
206 sys::fs::openFileForWrite(Twine(ResultPath.begin()), ResultFD,
207 sys::fs::F_RW | sys::fs::F_Excl, Mode)) {
208 if (EC == std::errc::file_exists)
209 goto retry_random_path;
218 error_code EC = sys::fs::exists(ResultPath.begin(), Exists);
222 goto retry_random_path;
227 if (error_code EC = sys::fs::create_directory(ResultPath.begin(), false)) {
228 if (EC == std::errc::file_exists)
229 goto retry_random_path;
235 llvm_unreachable("Invalid Type");
242 const_iterator begin(StringRef path) {
245 i.Component = find_first_component(path);
250 const_iterator end(StringRef path) {
253 i.Position = path.size();
257 const_iterator &const_iterator::operator++() {
258 assert(Position < Path.size() && "Tried to increment past end!");
260 // Increment Position to past the current component
261 Position += Component.size();
264 if (Position == Path.size()) {
265 Component = StringRef();
269 // Both POSIX and Windows treat paths that begin with exactly two separators
271 bool was_net = Component.size() > 2 &&
272 is_separator(Component[0]) &&
273 Component[1] == Component[0] &&
274 !is_separator(Component[2]);
276 // Handle separators.
277 if (is_separator(Path[Position])) {
282 || Component.endswith(":")
285 Component = Path.substr(Position, 1);
289 // Skip extra separators.
290 while (Position != Path.size() &&
291 is_separator(Path[Position])) {
295 // Treat trailing '/' as a '.'.
296 if (Position == Path.size()) {
303 // Find next component.
304 size_t end_pos = Path.find_first_of(separators, Position);
305 Component = Path.slice(Position, end_pos);
310 const_iterator &const_iterator::operator--() {
311 // If we're at the end and the previous char was a '/', return '.' unless
312 // we are the root path.
313 size_t root_dir_pos = root_dir_start(Path);
314 if (Position == Path.size() &&
315 Path.size() > root_dir_pos + 1 &&
316 is_separator(Path[Position - 1])) {
322 // Skip separators unless it's the root directory.
323 size_t end_pos = Position;
326 (end_pos - 1) != root_dir_pos &&
327 is_separator(Path[end_pos - 1]))
330 // Find next separator.
331 size_t start_pos = filename_pos(Path.substr(0, end_pos));
332 Component = Path.slice(start_pos, end_pos);
333 Position = start_pos;
337 bool const_iterator::operator==(const const_iterator &RHS) const {
338 return Path.begin() == RHS.Path.begin() &&
339 Position == RHS.Position;
342 bool const_iterator::operator!=(const const_iterator &RHS) const {
343 return !(*this == RHS);
346 ptrdiff_t const_iterator::operator-(const const_iterator &RHS) const {
347 return Position - RHS.Position;
350 const StringRef root_path(StringRef path) {
351 const_iterator b = begin(path),
355 bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
363 if (has_net || has_drive) {
364 if ((++pos != e) && is_separator((*pos)[0])) {
365 // {C:/,//net/}, so get the first two components.
366 return path.substr(0, b->size() + pos->size());
368 // just {C:,//net}, return the first component.
373 // POSIX style root directory.
374 if (is_separator((*b)[0])) {
382 const StringRef root_name(StringRef path) {
383 const_iterator b = begin(path),
386 bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
394 if (has_net || has_drive) {
395 // just {C:,//net}, return the first component.
400 // No path or no name.
404 const StringRef root_directory(StringRef path) {
405 const_iterator b = begin(path),
409 bool has_net = b->size() > 2 && is_separator((*b)[0]) && (*b)[1] == (*b)[0];
417 if ((has_net || has_drive) &&
418 // {C:,//net}, skip to the next component.
419 (++pos != e) && is_separator((*pos)[0])) {
423 // POSIX style root directory.
424 if (!has_net && is_separator((*b)[0])) {
429 // No path or no root.
433 const StringRef relative_path(StringRef path) {
434 StringRef root = root_path(path);
435 return path.substr(root.size());
438 void append(SmallVectorImpl<char> &path, const Twine &a,
442 SmallString<32> a_storage;
443 SmallString<32> b_storage;
444 SmallString<32> c_storage;
445 SmallString<32> d_storage;
447 SmallVector<StringRef, 4> components;
448 if (!a.isTriviallyEmpty()) components.push_back(a.toStringRef(a_storage));
449 if (!b.isTriviallyEmpty()) components.push_back(b.toStringRef(b_storage));
450 if (!c.isTriviallyEmpty()) components.push_back(c.toStringRef(c_storage));
451 if (!d.isTriviallyEmpty()) components.push_back(d.toStringRef(d_storage));
453 for (SmallVectorImpl<StringRef>::const_iterator i = components.begin(),
454 e = components.end();
456 bool path_has_sep = !path.empty() && is_separator(path[path.size() - 1]);
457 bool component_has_sep = !i->empty() && is_separator((*i)[0]);
458 bool is_root_name = has_root_name(*i);
461 // Strip separators from beginning of component.
462 size_t loc = i->find_first_not_of(separators);
463 StringRef c = i->substr(loc);
466 path.append(c.begin(), c.end());
470 if (!component_has_sep && !(path.empty() || is_root_name)) {
472 path.push_back(preferred_separator);
475 path.append(i->begin(), i->end());
479 void append(SmallVectorImpl<char> &path,
480 const_iterator begin, const_iterator end) {
481 for (; begin != end; ++begin)
482 path::append(path, *begin);
485 const StringRef parent_path(StringRef path) {
486 size_t end_pos = parent_path_end(path);
487 if (end_pos == StringRef::npos)
490 return path.substr(0, end_pos);
493 void remove_filename(SmallVectorImpl<char> &path) {
494 size_t end_pos = parent_path_end(StringRef(path.begin(), path.size()));
495 if (end_pos != StringRef::npos)
496 path.set_size(end_pos);
499 void replace_extension(SmallVectorImpl<char> &path, const Twine &extension) {
500 StringRef p(path.begin(), path.size());
501 SmallString<32> ext_storage;
502 StringRef ext = extension.toStringRef(ext_storage);
504 // Erase existing extension.
505 size_t pos = p.find_last_of('.');
506 if (pos != StringRef::npos && pos >= filename_pos(p))
509 // Append '.' if needed.
510 if (ext.size() > 0 && ext[0] != '.')
514 path.append(ext.begin(), ext.end());
517 void native(const Twine &path, SmallVectorImpl<char> &result) {
518 assert((!path.isSingleStringRef() ||
519 path.getSingleStringRef().data() != result.data()) &&
520 "path and result are not allowed to overlap!");
523 path.toVector(result);
527 void native(SmallVectorImpl<char> &path) {
529 std::replace(path.begin(), path.end(), '/', '\\');
533 const StringRef filename(StringRef path) {
534 return *(--end(path));
537 const StringRef stem(StringRef path) {
538 StringRef fname = filename(path);
539 size_t pos = fname.find_last_of('.');
540 if (pos == StringRef::npos)
543 if ((fname.size() == 1 && fname == ".") ||
544 (fname.size() == 2 && fname == ".."))
547 return fname.substr(0, pos);
550 const StringRef extension(StringRef path) {
551 StringRef fname = filename(path);
552 size_t pos = fname.find_last_of('.');
553 if (pos == StringRef::npos)
556 if ((fname.size() == 1 && fname == ".") ||
557 (fname.size() == 2 && fname == ".."))
560 return fname.substr(pos);
563 bool is_separator(char value) {
566 case '\\': // fall through
568 case '/': return true;
569 default: return false;
573 static const char preferred_separator_string[] = { preferred_separator, '\0' };
575 const StringRef get_separator() {
576 return preferred_separator_string;
579 void system_temp_directory(bool erasedOnReboot, SmallVectorImpl<char> &result) {
582 #if defined(_CS_DARWIN_USER_TEMP_DIR) && defined(_CS_DARWIN_USER_CACHE_DIR)
583 // On Darwin, use DARWIN_USER_TEMP_DIR or DARWIN_USER_CACHE_DIR.
584 // macros defined in <unistd.h> on darwin >= 9
585 int ConfName = erasedOnReboot? _CS_DARWIN_USER_TEMP_DIR
586 : _CS_DARWIN_USER_CACHE_DIR;
587 size_t ConfLen = confstr(ConfName, nullptr, 0);
590 result.resize(ConfLen);
591 ConfLen = confstr(ConfName, result.data(), result.size());
592 } while (ConfLen > 0 && ConfLen != result.size());
595 assert(result.back() == 0);
604 // Check whether the temporary directory is specified by an environment
606 const char *EnvironmentVariable;
608 EnvironmentVariable = "TEMP";
610 EnvironmentVariable = "TMPDIR";
612 if (char *RequestedDir = getenv(EnvironmentVariable)) {
613 result.append(RequestedDir, RequestedDir + strlen(RequestedDir));
617 // Fall back to a system default.
618 const char *DefaultResult;
620 (void)erasedOnReboot;
621 DefaultResult = "C:\\TEMP";
624 DefaultResult = "/tmp";
626 DefaultResult = "/var/tmp";
628 result.append(DefaultResult, DefaultResult + strlen(DefaultResult));
631 bool has_root_name(const Twine &path) {
632 SmallString<128> path_storage;
633 StringRef p = path.toStringRef(path_storage);
635 return !root_name(p).empty();
638 bool has_root_directory(const Twine &path) {
639 SmallString<128> path_storage;
640 StringRef p = path.toStringRef(path_storage);
642 return !root_directory(p).empty();
645 bool has_root_path(const Twine &path) {
646 SmallString<128> path_storage;
647 StringRef p = path.toStringRef(path_storage);
649 return !root_path(p).empty();
652 bool has_relative_path(const Twine &path) {
653 SmallString<128> path_storage;
654 StringRef p = path.toStringRef(path_storage);
656 return !relative_path(p).empty();
659 bool has_filename(const Twine &path) {
660 SmallString<128> path_storage;
661 StringRef p = path.toStringRef(path_storage);
663 return !filename(p).empty();
666 bool has_parent_path(const Twine &path) {
667 SmallString<128> path_storage;
668 StringRef p = path.toStringRef(path_storage);
670 return !parent_path(p).empty();
673 bool has_stem(const Twine &path) {
674 SmallString<128> path_storage;
675 StringRef p = path.toStringRef(path_storage);
677 return !stem(p).empty();
680 bool has_extension(const Twine &path) {
681 SmallString<128> path_storage;
682 StringRef p = path.toStringRef(path_storage);
684 return !extension(p).empty();
687 bool is_absolute(const Twine &path) {
688 SmallString<128> path_storage;
689 StringRef p = path.toStringRef(path_storage);
691 bool rootDir = has_root_directory(p),
693 rootName = has_root_name(p);
698 return rootDir && rootName;
701 bool is_relative(const Twine &path) {
702 return !is_absolute(path);
705 } // end namespace path
709 error_code getUniqueID(const Twine Path, UniqueID &Result) {
711 error_code EC = status(Path, Status);
714 Result = Status.getUniqueID();
718 error_code createUniqueFile(const Twine &Model, int &ResultFd,
719 SmallVectorImpl<char> &ResultPath, unsigned Mode) {
720 return createUniqueEntity(Model, ResultFd, ResultPath, false, Mode, FS_File);
723 error_code createUniqueFile(const Twine &Model,
724 SmallVectorImpl<char> &ResultPath) {
726 return createUniqueEntity(Model, Dummy, ResultPath, false, 0, FS_Name);
729 static error_code createTemporaryFile(const Twine &Model, int &ResultFD,
730 llvm::SmallVectorImpl<char> &ResultPath,
732 SmallString<128> Storage;
733 StringRef P = Model.toNullTerminatedStringRef(Storage);
734 assert(P.find_first_of(separators) == StringRef::npos &&
735 "Model must be a simple filename.");
736 // Use P.begin() so that createUniqueEntity doesn't need to recreate Storage.
737 return createUniqueEntity(P.begin(), ResultFD, ResultPath,
738 true, owner_read | owner_write, Type);
742 createTemporaryFile(const Twine &Prefix, StringRef Suffix, int &ResultFD,
743 llvm::SmallVectorImpl<char> &ResultPath,
745 const char *Middle = Suffix.empty() ? "-%%%%%%" : "-%%%%%%.";
746 return createTemporaryFile(Prefix + Middle + Suffix, ResultFD, ResultPath,
751 error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix,
753 SmallVectorImpl<char> &ResultPath) {
754 return createTemporaryFile(Prefix, Suffix, ResultFD, ResultPath, FS_File);
757 error_code createTemporaryFile(const Twine &Prefix, StringRef Suffix,
758 SmallVectorImpl<char> &ResultPath) {
760 return createTemporaryFile(Prefix, Suffix, Dummy, ResultPath, FS_Name);
764 // This is a mkdtemp with a different pattern. We use createUniqueEntity mostly
765 // for consistency. We should try using mkdtemp.
766 error_code createUniqueDirectory(const Twine &Prefix,
767 SmallVectorImpl<char> &ResultPath) {
769 return createUniqueEntity(Prefix + "-%%%%%%", Dummy, ResultPath,
773 error_code make_absolute(SmallVectorImpl<char> &path) {
774 StringRef p(path.data(), path.size());
776 bool rootDirectory = path::has_root_directory(p),
778 rootName = path::has_root_name(p);
784 if (rootName && rootDirectory)
787 // All of the following conditions will need the current directory.
788 SmallString<128> current_dir;
789 if (error_code ec = current_path(current_dir)) return ec;
791 // Relative path. Prepend the current directory.
792 if (!rootName && !rootDirectory) {
793 // Append path to the current directory.
794 path::append(current_dir, p);
795 // Set path to the result.
796 path.swap(current_dir);
800 if (!rootName && rootDirectory) {
801 StringRef cdrn = path::root_name(current_dir);
802 SmallString<128> curDirRootName(cdrn.begin(), cdrn.end());
803 path::append(curDirRootName, p);
804 // Set path to the result.
805 path.swap(curDirRootName);
809 if (rootName && !rootDirectory) {
810 StringRef pRootName = path::root_name(p);
811 StringRef bRootDirectory = path::root_directory(current_dir);
812 StringRef bRelativePath = path::relative_path(current_dir);
813 StringRef pRelativePath = path::relative_path(p);
815 SmallString<128> res;
816 path::append(res, pRootName, bRootDirectory, bRelativePath, pRelativePath);
821 llvm_unreachable("All rootName and rootDirectory combinations should have "
825 error_code create_directories(const Twine &Path, bool IgnoreExisting) {
826 SmallString<128> PathStorage;
827 StringRef P = Path.toStringRef(PathStorage);
829 // Be optimistic and try to create the directory
830 error_code EC = create_directory(P, IgnoreExisting);
831 // If we succeeded, or had any error other than the parent not existing, just
833 if (EC != std::errc::no_such_file_or_directory)
836 // We failed because of a no_such_file_or_directory, try to create the
838 StringRef Parent = path::parent_path(P);
842 if ((EC = create_directories(Parent)))
845 return create_directory(P, IgnoreExisting);
848 bool exists(file_status status) {
849 return status_known(status) && status.type() != file_type::file_not_found;
852 bool status_known(file_status s) {
853 return s.type() != file_type::status_error;
856 bool is_directory(file_status status) {
857 return status.type() == file_type::directory_file;
860 error_code is_directory(const Twine &path, bool &result) {
862 if (error_code ec = status(path, st))
864 result = is_directory(st);
868 bool is_regular_file(file_status status) {
869 return status.type() == file_type::regular_file;
872 error_code is_regular_file(const Twine &path, bool &result) {
874 if (error_code ec = status(path, st))
876 result = is_regular_file(st);
880 bool is_other(file_status status) {
881 return exists(status) &&
882 !is_regular_file(status) &&
883 !is_directory(status);
886 void directory_entry::replace_filename(const Twine &filename, file_status st) {
887 SmallString<128> path(Path.begin(), Path.end());
888 path::remove_filename(path);
889 path::append(path, filename);
894 /// @brief Identify the magic in magic.
895 file_magic identify_magic(StringRef Magic) {
896 if (Magic.size() < 4)
897 return file_magic::unknown;
898 switch ((unsigned char)Magic[0]) {
900 // COFF short import library file
901 if (Magic[1] == (char)0x00 && Magic[2] == (char)0xff &&
902 Magic[3] == (char)0xff)
903 return file_magic::coff_import_library;
904 // Windows resource file
905 const char Expected[] = { 0, 0, 0, 0, '\x20', 0, 0, 0, '\xff' };
906 if (Magic.size() >= sizeof(Expected) &&
907 memcmp(Magic.data(), Expected, sizeof(Expected)) == 0)
908 return file_magic::windows_resource;
909 // 0x0000 = COFF unknown machine type
911 return file_magic::coff_object;
914 case 0xDE: // 0x0B17C0DE = BC wraper
915 if (Magic[1] == (char)0xC0 && Magic[2] == (char)0x17 &&
916 Magic[3] == (char)0x0B)
917 return file_magic::bitcode;
920 if (Magic[1] == 'C' && Magic[2] == (char)0xC0 && Magic[3] == (char)0xDE)
921 return file_magic::bitcode;
924 if (Magic.size() >= 8)
925 if (memcmp(Magic.data(),"!<arch>\n",8) == 0)
926 return file_magic::archive;
930 if (Magic.size() >= 18 && Magic[1] == 'E' && Magic[2] == 'L' &&
932 bool Data2MSB = Magic[5] == 2;
933 unsigned high = Data2MSB ? 16 : 17;
934 unsigned low = Data2MSB ? 17 : 16;
935 if (Magic[high] == 0)
936 switch (Magic[low]) {
938 case 1: return file_magic::elf_relocatable;
939 case 2: return file_magic::elf_executable;
940 case 3: return file_magic::elf_shared_object;
941 case 4: return file_magic::elf_core;
947 if (Magic[1] == char(0xFE) && Magic[2] == char(0xBA) &&
948 Magic[3] == char(0xBE)) {
949 // This is complicated by an overlap with Java class files.
950 // See the Mach-O section in /usr/share/file/magic for details.
951 if (Magic.size() >= 8 && Magic[7] < 43)
952 return file_magic::macho_universal_binary;
956 // The two magic numbers for mach-o are:
957 // 0xfeedface - 32-bit mach-o
958 // 0xfeedfacf - 64-bit mach-o
963 if (Magic[0] == char(0xFE) && Magic[1] == char(0xED) &&
964 Magic[2] == char(0xFA) &&
965 (Magic[3] == char(0xCE) || Magic[3] == char(0xCF))) {
967 if (Magic.size() >= 16) type = Magic[14] << 8 | Magic[15];
968 } else if ((Magic[0] == char(0xCE) || Magic[0] == char(0xCF)) &&
969 Magic[1] == char(0xFA) && Magic[2] == char(0xED) &&
970 Magic[3] == char(0xFE)) {
972 if (Magic.size() >= 14) type = Magic[13] << 8 | Magic[12];
976 case 1: return file_magic::macho_object;
977 case 2: return file_magic::macho_executable;
978 case 3: return file_magic::macho_fixed_virtual_memory_shared_lib;
979 case 4: return file_magic::macho_core;
980 case 5: return file_magic::macho_preload_executable;
981 case 6: return file_magic::macho_dynamically_linked_shared_lib;
982 case 7: return file_magic::macho_dynamic_linker;
983 case 8: return file_magic::macho_bundle;
984 case 9: return file_magic::macho_dynamic_linker;
985 case 10: return file_magic::macho_dsym_companion;
989 case 0xF0: // PowerPC Windows
990 case 0x83: // Alpha 32-bit
991 case 0x84: // Alpha 64-bit
992 case 0x66: // MPS R4000 Windows
994 case 0x4c: // 80386 Windows
995 case 0xc4: // ARMNT Windows
996 if (Magic[1] == 0x01)
997 return file_magic::coff_object;
999 case 0x90: // PA-RISC Windows
1000 case 0x68: // mc68K Windows
1001 if (Magic[1] == 0x02)
1002 return file_magic::coff_object;
1005 case 0x4d: // Possible MS-DOS stub on Windows PE file
1006 if (Magic[1] == 0x5a) {
1008 *reinterpret_cast<const support::ulittle32_t*>(Magic.data() + 0x3c);
1009 // PE/COFF file, either EXE or DLL.
1010 if (off < Magic.size() && memcmp(Magic.data() + off, "PE\0\0",4) == 0)
1011 return file_magic::pecoff_executable;
1015 case 0x64: // x86-64 Windows.
1016 if (Magic[1] == char(0x86))
1017 return file_magic::coff_object;
1023 return file_magic::unknown;
1026 error_code identify_magic(const Twine &Path, file_magic &Result) {
1028 if (error_code EC = openFileForRead(Path, FD))
1032 int Length = read(FD, Buffer, sizeof(Buffer));
1034 return error_code(errno, std::generic_category());
1036 Result = identify_magic(StringRef(Buffer, Length));
1037 return error_code();
1040 error_code directory_entry::status(file_status &result) const {
1041 return fs::status(Path, result);
1044 } // end namespace fs
1045 } // end namespace sys
1046 } // end namespace llvm
1048 // Include the truly platform-specific parts.
1049 #if defined(LLVM_ON_UNIX)
1050 #include "Unix/Path.inc"
1052 #if defined(LLVM_ON_WIN32)
1053 #include "Windows/Path.inc"