1 //===- llvm/Support/Windows/Path.inc - Windows Path Impl --------*- C++ -*-===//
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 Windows specific implementation of the Path API.
12 //===----------------------------------------------------------------------===//
14 //===----------------------------------------------------------------------===//
15 //=== WARNING: Implementation here must contain only generic Windows code that
16 //=== is guaranteed to work on *all* Windows variants.
17 //===----------------------------------------------------------------------===//
19 #include "llvm/ADT/STLExtras.h"
24 #include <sys/types.h>
28 // MinGW doesn't define this.
29 #ifndef _ERRNO_T_DEFINED
30 #define _ERRNO_T_DEFINED
37 typedef BOOLEAN (WINAPI *PtrCreateSymbolicLinkW)(
38 /*__in*/ LPCWSTR lpSymlinkFileName,
39 /*__in*/ LPCWSTR lpTargetFileName,
40 /*__in*/ DWORD dwFlags);
42 PtrCreateSymbolicLinkW create_symbolic_link_api = PtrCreateSymbolicLinkW(
43 ::GetProcAddress(::GetModuleHandleA("kernel32.dll"),
44 "CreateSymbolicLinkW"));
46 error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16) {
47 int len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
48 utf8.begin(), utf8.size(),
52 return windows_error(::GetLastError());
54 utf16.reserve(len + 1);
57 len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
58 utf8.begin(), utf8.size(),
59 utf16.begin(), utf16.size());
62 return windows_error(::GetLastError());
64 // Make utf16 null terminated.
68 return error_code::success();
71 error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
72 SmallVectorImpl<char> &utf8) {
74 int len = ::WideCharToMultiByte(CP_UTF8, 0,
80 return windows_error(::GetLastError());
85 // Now do the actual conversion.
86 len = ::WideCharToMultiByte(CP_UTF8, 0,
88 utf8.data(), utf8.size(),
92 return windows_error(::GetLastError());
94 // Make utf8 null terminated.
98 return error_code::success();
101 error_code TempDir(SmallVectorImpl<wchar_t> &result) {
103 DWORD len = ::GetTempPathW(result.capacity(), result.begin());
106 return windows_error(::GetLastError());
108 if (len > result.capacity()) {
113 result.set_size(len);
114 return error_code::success();
117 bool is_separator(const wchar_t value) {
128 // FIXME: mode should be used here and default to user r/w only,
129 // it currently comes in as a UNIX mode.
130 static error_code createUniqueEntity(const Twine &model, int &result_fd,
131 SmallVectorImpl<char> &result_path,
132 bool makeAbsolute, unsigned mode,
134 // Use result_path as temp storage.
135 result_path.set_size(0);
136 StringRef m = model.toStringRef(result_path);
138 SmallVector<wchar_t, 128> model_utf16;
139 if (error_code ec = UTF8ToUTF16(m, model_utf16)) return ec;
142 // Make model absolute by prepending a temp directory if it's not already.
143 bool absolute = sys::path::is_absolute(m);
146 SmallVector<wchar_t, 64> temp_dir;
147 if (error_code ec = TempDir(temp_dir)) return ec;
148 // Handle c: by removing it.
149 if (model_utf16.size() > 2 && model_utf16[1] == L':') {
150 model_utf16.erase(model_utf16.begin(), model_utf16.begin() + 2);
152 model_utf16.insert(model_utf16.begin(), temp_dir.begin(), temp_dir.end());
156 // Replace '%' with random chars. From here on, DO NOT modify model. It may be
157 // needed if the randomly chosen path already exists.
158 SmallVector<wchar_t, 128> random_path_utf16;
160 // Get a Crypto Provider for CryptGenRandom.
162 if (!::CryptAcquireContextW(&HCPC,
166 CRYPT_VERIFYCONTEXT))
167 return windows_error(::GetLastError());
168 ScopedCryptContext CryptoProvider(HCPC);
171 random_path_utf16.set_size(0);
172 for (SmallVectorImpl<wchar_t>::const_iterator i = model_utf16.begin(),
173 e = model_utf16.end();
177 if (!::CryptGenRandom(CryptoProvider, 1, &val))
178 return windows_error(::GetLastError());
179 random_path_utf16.push_back("0123456789abcdef"[val & 15]);
182 random_path_utf16.push_back(*i);
184 // Make random_path_utf16 null terminated.
185 random_path_utf16.push_back(0);
186 random_path_utf16.pop_back();
188 HANDLE TempFileHandle;
192 // Try to create + open the path.
194 ::CreateFileW(random_path_utf16.begin(), GENERIC_READ | GENERIC_WRITE,
195 FILE_SHARE_READ, NULL,
196 // Return ERROR_FILE_EXISTS if the file
198 CREATE_NEW, FILE_ATTRIBUTE_TEMPORARY, NULL);
199 if (TempFileHandle == INVALID_HANDLE_VALUE) {
200 // If the file existed, try again, otherwise, error.
201 error_code ec = windows_error(::GetLastError());
202 if (ec == windows_error::file_exists)
203 goto retry_random_path;
208 // Convert the Windows API file handle into a C-runtime handle.
209 int fd = ::_open_osfhandle(intptr_t(TempFileHandle), 0);
211 ::CloseHandle(TempFileHandle);
212 ::DeleteFileW(random_path_utf16.begin());
213 // MSDN doesn't say anything about _open_osfhandle setting errno or
214 // GetLastError(), so just return invalid_handle.
215 return windows_error::invalid_handle;
223 DWORD attributes = ::GetFileAttributesW(random_path_utf16.begin());
224 if (attributes != INVALID_FILE_ATTRIBUTES)
225 goto retry_random_path;
226 error_code EC = make_error_code(windows_error(::GetLastError()));
227 if (EC != windows_error::file_not_found &&
228 EC != windows_error::path_not_found)
234 if (!::CreateDirectoryW(random_path_utf16.begin(), NULL)) {
235 error_code EC = windows_error(::GetLastError());
236 if (EC != windows_error::already_exists)
238 goto retry_random_path;
243 // Set result_path to the utf-8 representation of the path.
244 if (error_code ec = UTF16ToUTF8(random_path_utf16.begin(),
245 random_path_utf16.size(), result_path)) {
248 ::CloseHandle(TempFileHandle);
249 ::DeleteFileW(random_path_utf16.begin());
253 ::RemoveDirectoryW(random_path_utf16.begin());
259 return error_code::success();
266 std::string getMainExecutable(const char *argv0, void *MainExecAddr) {
267 char pathname[MAX_PATH];
268 DWORD ret = ::GetModuleFileNameA(NULL, pathname, MAX_PATH);
269 return ret != MAX_PATH ? pathname : "";
273 TimeValue file_status::getLastModificationTime() const {
275 UI.LowPart = LastWriteTimeLow;
276 UI.HighPart = LastWriteTimeHigh;
279 Ret.fromWin32Time(UI.QuadPart);
283 error_code current_path(SmallVectorImpl<char> &result) {
284 SmallVector<wchar_t, 128> cur_path;
285 cur_path.reserve(128);
287 DWORD len = ::GetCurrentDirectoryW(cur_path.capacity(), cur_path.data());
289 // A zero return value indicates a failure other than insufficient space.
291 return windows_error(::GetLastError());
293 // If there's insufficient space, the len returned is larger than the len
295 if (len > cur_path.capacity()) {
296 cur_path.reserve(len);
300 cur_path.set_size(len);
301 // cur_path now holds the current directory in utf-16. Convert to utf-8.
303 // Find out how much space we need. Sadly, this function doesn't return the
304 // size needed unless you tell it the result size is 0, which means you
305 // _always_ have to call it twice.
306 len = ::WideCharToMultiByte(CP_UTF8, 0,
307 cur_path.data(), cur_path.size(),
312 return make_error_code(windows_error(::GetLastError()));
315 result.set_size(len);
316 // Now do the actual conversion.
317 len = ::WideCharToMultiByte(CP_UTF8, 0,
318 cur_path.data(), cur_path.size(),
319 result.data(), result.size(),
322 return windows_error(::GetLastError());
324 return error_code::success();
327 error_code copy_file(const Twine &from, const Twine &to, copy_option copt) {
329 SmallString<128> from_storage;
330 SmallString<128> to_storage;
331 StringRef f = from.toStringRef(from_storage);
332 StringRef t = to.toStringRef(to_storage);
334 // Convert to utf-16.
335 SmallVector<wchar_t, 128> wide_from;
336 SmallVector<wchar_t, 128> wide_to;
337 if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
338 if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
341 BOOL res = ::CopyFileW(wide_from.begin(), wide_to.begin(),
342 copt != copy_option::overwrite_if_exists);
345 return windows_error(::GetLastError());
347 return error_code::success();
350 error_code create_directory(const Twine &path, bool &existed) {
351 SmallString<128> path_storage;
352 SmallVector<wchar_t, 128> path_utf16;
354 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
358 if (!::CreateDirectoryW(path_utf16.begin(), NULL)) {
359 error_code ec = windows_error(::GetLastError());
360 if (ec == windows_error::already_exists)
367 return error_code::success();
370 error_code create_hard_link(const Twine &to, const Twine &from) {
372 SmallString<128> from_storage;
373 SmallString<128> to_storage;
374 StringRef f = from.toStringRef(from_storage);
375 StringRef t = to.toStringRef(to_storage);
377 // Convert to utf-16.
378 SmallVector<wchar_t, 128> wide_from;
379 SmallVector<wchar_t, 128> wide_to;
380 if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
381 if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
383 if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL))
384 return windows_error(::GetLastError());
386 return error_code::success();
389 error_code create_symlink(const Twine &to, const Twine &from) {
390 // Only do it if the function is available at runtime.
391 if (!create_symbolic_link_api)
392 return make_error_code(errc::function_not_supported);
395 SmallString<128> from_storage;
396 SmallString<128> to_storage;
397 StringRef f = from.toStringRef(from_storage);
398 StringRef t = to.toStringRef(to_storage);
400 // Convert to utf-16.
401 SmallVector<wchar_t, 128> wide_from;
402 SmallVector<wchar_t, 128> wide_to;
403 if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
404 if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
406 if (!create_symbolic_link_api(wide_from.begin(), wide_to.begin(), 0))
407 return windows_error(::GetLastError());
409 return error_code::success();
412 error_code remove(const Twine &path, bool &existed) {
413 SmallString<128> path_storage;
414 SmallVector<wchar_t, 128> path_utf16;
417 if (error_code ec = status(path, st))
420 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
424 if (st.type() == file_type::directory_file) {
425 if (!::RemoveDirectoryW(c_str(path_utf16))) {
426 error_code ec = windows_error(::GetLastError());
427 if (ec != windows_error::file_not_found)
433 if (!::DeleteFileW(c_str(path_utf16))) {
434 error_code ec = windows_error(::GetLastError());
435 if (ec != windows_error::file_not_found)
442 return error_code::success();
445 error_code rename(const Twine &from, const Twine &to) {
447 SmallString<128> from_storage;
448 SmallString<128> to_storage;
449 StringRef f = from.toStringRef(from_storage);
450 StringRef t = to.toStringRef(to_storage);
452 // Convert to utf-16.
453 SmallVector<wchar_t, 128> wide_from;
454 SmallVector<wchar_t, 128> wide_to;
455 if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
456 if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
458 error_code ec = error_code::success();
459 for (int i = 0; i < 2000; i++) {
460 if (::MoveFileExW(wide_from.begin(), wide_to.begin(),
461 MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
462 return error_code::success();
463 ec = windows_error(::GetLastError());
464 if (ec != windows_error::access_denied)
466 // Retry MoveFile() at ACCESS_DENIED.
467 // System scanners (eg. indexer) might open the source file when
468 // It is written and closed.
475 error_code resize_file(const Twine &path, uint64_t size) {
476 SmallString<128> path_storage;
477 SmallVector<wchar_t, 128> path_utf16;
479 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
483 int fd = ::_wopen(path_utf16.begin(), O_BINARY | _O_RDWR, S_IWRITE);
485 return error_code(errno, generic_category());
486 #ifdef HAVE__CHSIZE_S
487 errno_t error = ::_chsize_s(fd, size);
489 errno_t error = ::_chsize(fd, size);
492 return error_code(error, generic_category());
495 error_code exists(const Twine &path, bool &result) {
496 SmallString<128> path_storage;
497 SmallVector<wchar_t, 128> path_utf16;
499 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
503 DWORD attributes = ::GetFileAttributesW(path_utf16.begin());
505 if (attributes == INVALID_FILE_ATTRIBUTES) {
506 // See if the file didn't actually exist.
507 error_code ec = make_error_code(windows_error(::GetLastError()));
508 if (ec != windows_error::file_not_found &&
509 ec != windows_error::path_not_found)
514 return error_code::success();
517 bool can_write(const Twine &Path) {
518 // FIXME: take security attributes into account.
519 SmallString<128> PathStorage;
520 SmallVector<wchar_t, 128> PathUtf16;
522 if (UTF8ToUTF16(Path.toStringRef(PathStorage), PathUtf16))
525 DWORD Attr = ::GetFileAttributesW(PathUtf16.begin());
526 return (Attr != INVALID_FILE_ATTRIBUTES) && !(Attr & FILE_ATTRIBUTE_READONLY);
529 bool can_execute(const Twine &Path) {
530 SmallString<128> PathStorage;
531 SmallVector<wchar_t, 128> PathUtf16;
533 if (UTF8ToUTF16(Path.toStringRef(PathStorage), PathUtf16))
536 DWORD Attr = ::GetFileAttributesW(PathUtf16.begin());
537 return Attr != INVALID_FILE_ATTRIBUTES;
540 bool equivalent(file_status A, file_status B) {
541 assert(status_known(A) && status_known(B));
542 return A.FileIndexHigh == B.FileIndexHigh &&
543 A.FileIndexLow == B.FileIndexLow &&
544 A.FileSizeHigh == B.FileSizeHigh &&
545 A.FileSizeLow == B.FileSizeLow &&
546 A.LastWriteTimeHigh == B.LastWriteTimeHigh &&
547 A.LastWriteTimeLow == B.LastWriteTimeLow &&
548 A.VolumeSerialNumber == B.VolumeSerialNumber;
551 error_code equivalent(const Twine &A, const Twine &B, bool &result) {
552 file_status fsA, fsB;
553 if (error_code ec = status(A, fsA)) return ec;
554 if (error_code ec = status(B, fsB)) return ec;
555 result = equivalent(fsA, fsB);
556 return error_code::success();
559 error_code getUniqueID(const Twine Path, uint64_t &Result) {
561 if (error_code E = status(Path, Status))
564 // The file is uniquely identified by the volume serial number along
565 // with the 64-bit file identifier.
566 Result = (static_cast<uint64_t>(Status.FileIndexHigh) << 32ULL) |
567 static_cast<uint64_t>(Status.FileIndexLow);
569 // Because the serial number is 32-bits, but we've already used up all 64
570 // bits for the file index, XOR the serial number into the high 32 bits of
571 // the resulting value. We could potentially get collisons from this, but
572 // the likelihood is low.
573 Result ^= (static_cast<uint64_t>(Status.VolumeSerialNumber) << 32ULL);
575 return error_code::success();
578 static bool isReservedName(StringRef path) {
579 // This list of reserved names comes from MSDN, at:
580 // http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx
581 static const char *sReservedNames[] = { "nul", "con", "prn", "aux",
582 "com1", "com2", "com3", "com4", "com5", "com6",
583 "com7", "com8", "com9", "lpt1", "lpt2", "lpt3",
584 "lpt4", "lpt5", "lpt6", "lpt7", "lpt8", "lpt9" };
586 // First, check to see if this is a device namespace, which always
587 // starts with \\.\, since device namespaces are not legal file paths.
588 if (path.startswith("\\\\.\\"))
591 // Then compare against the list of ancient reserved names
592 for (size_t i = 0; i < array_lengthof(sReservedNames); ++i) {
593 if (path.equals_lower(sReservedNames[i]))
597 // The path isn't what we consider reserved.
601 static error_code getStatus(HANDLE FileHandle, file_status &Result) {
602 if (FileHandle == INVALID_HANDLE_VALUE)
603 goto handle_status_error;
605 BY_HANDLE_FILE_INFORMATION Info;
606 if (!::GetFileInformationByHandle(FileHandle, &Info))
607 goto handle_status_error;
609 Result = file_status(
610 file_type::regular_file, Info.ftLastWriteTime.dwHighDateTime,
611 Info.ftLastWriteTime.dwLowDateTime, Info.dwVolumeSerialNumber,
612 Info.nFileSizeHigh, Info.nFileSizeLow, Info.nFileIndexHigh,
614 return error_code::success();
617 error_code EC = windows_error(::GetLastError());
618 if (EC == windows_error::file_not_found ||
619 EC == windows_error::path_not_found)
620 Result = file_status(file_type::file_not_found);
621 else if (EC == windows_error::sharing_violation)
622 Result = file_status(file_type::type_unknown);
624 Result = file_status(file_type::status_error);
627 return error_code::success();
630 error_code status(const Twine &path, file_status &result) {
631 SmallString<128> path_storage;
632 SmallVector<wchar_t, 128> path_utf16;
634 StringRef path8 = path.toStringRef(path_storage);
635 if (isReservedName(path8)) {
636 result = file_status(file_type::character_file);
637 return error_code::success();
640 if (error_code ec = UTF8ToUTF16(path8, path_utf16))
643 DWORD attr = ::GetFileAttributesW(path_utf16.begin());
644 if (attr == INVALID_FILE_ATTRIBUTES)
645 return getStatus(INVALID_HANDLE_VALUE, result);
647 // Handle reparse points.
648 if (attr & FILE_ATTRIBUTE_REPARSE_POINT) {
650 ::CreateFileW(path_utf16.begin(),
651 0, // Attributes only.
652 FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
655 FILE_FLAG_BACKUP_SEMANTICS,
658 return getStatus(INVALID_HANDLE_VALUE, result);
661 if (attr & FILE_ATTRIBUTE_DIRECTORY)
662 result = file_status(file_type::directory_file);
665 ::CreateFileW(path_utf16.begin(),
666 0, // Attributes only.
667 FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
670 FILE_FLAG_BACKUP_SEMANTICS,
673 return getStatus(INVALID_HANDLE_VALUE, result);
674 BY_HANDLE_FILE_INFORMATION Info;
675 if (!::GetFileInformationByHandle(h, &Info))
676 return getStatus(INVALID_HANDLE_VALUE, result);
678 return getStatus(h, result);
680 return error_code::success();
683 error_code status(int FD, file_status &Result) {
684 HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
685 return getStatus(FileHandle, Result);
688 error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
690 UI.QuadPart = Time.toWin32Time();
692 FT.dwLowDateTime = UI.LowPart;
693 FT.dwHighDateTime = UI.HighPart;
694 HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
695 if (!SetFileTime(FileHandle, NULL, &FT, &FT))
696 return windows_error(::GetLastError());
697 return error_code::success();
700 error_code get_magic(const Twine &path, uint32_t len,
701 SmallVectorImpl<char> &result) {
702 SmallString<128> path_storage;
703 SmallVector<wchar_t, 128> path_utf16;
706 // Convert path to UTF-16.
707 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
712 HANDLE file = ::CreateFileW(c_str(path_utf16),
717 FILE_ATTRIBUTE_READONLY,
719 if (file == INVALID_HANDLE_VALUE)
720 return windows_error(::GetLastError());
726 DWORD bytes_read = 0;
727 BOOL read_success = ::ReadFile(file, result.data(), len, &bytes_read, NULL);
728 error_code ec = windows_error(::GetLastError());
730 if (!read_success || (bytes_read != len)) {
731 // Set result size to the number of bytes read if it's valid.
732 if (bytes_read <= len)
733 result.set_size(bytes_read);
734 // ERROR_HANDLE_EOF is mapped to errc::value_too_large.
738 result.set_size(len);
739 return error_code::success();
742 error_code mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) {
744 // Make sure that the requested size fits within SIZE_T.
745 if (Size > std::numeric_limits<SIZE_T>::max()) {
746 if (FileDescriptor) {
748 _close(FileDescriptor);
750 ::CloseHandle(FileHandle);
751 return make_error_code(errc::invalid_argument);
756 case readonly: flprotect = PAGE_READONLY; break;
757 case readwrite: flprotect = PAGE_READWRITE; break;
758 case priv: flprotect = PAGE_WRITECOPY; break;
761 FileMappingHandle = ::CreateFileMapping(FileHandle,
767 if (FileMappingHandle == NULL) {
768 error_code ec = windows_error(GetLastError());
769 if (FileDescriptor) {
771 _close(FileDescriptor);
773 ::CloseHandle(FileHandle);
777 DWORD dwDesiredAccess;
779 case readonly: dwDesiredAccess = FILE_MAP_READ; break;
780 case readwrite: dwDesiredAccess = FILE_MAP_WRITE; break;
781 case priv: dwDesiredAccess = FILE_MAP_COPY; break;
783 Mapping = ::MapViewOfFile(FileMappingHandle,
788 if (Mapping == NULL) {
789 error_code ec = windows_error(GetLastError());
790 ::CloseHandle(FileMappingHandle);
791 if (FileDescriptor) {
793 _close(FileDescriptor);
795 ::CloseHandle(FileHandle);
800 MEMORY_BASIC_INFORMATION mbi;
801 SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi));
803 error_code ec = windows_error(GetLastError());
804 ::UnmapViewOfFile(Mapping);
805 ::CloseHandle(FileMappingHandle);
806 if (FileDescriptor) {
808 _close(FileDescriptor);
810 ::CloseHandle(FileHandle);
813 Size = mbi.RegionSize;
816 // Close all the handles except for the view. It will keep the other handles
818 ::CloseHandle(FileMappingHandle);
819 if (FileDescriptor) {
821 _close(FileDescriptor); // Also closes FileHandle.
823 ::CloseHandle(FileHandle);
824 return error_code::success();
827 mapped_file_region::mapped_file_region(const Twine &path,
836 , FileHandle(INVALID_HANDLE_VALUE)
837 , FileMappingHandle() {
838 SmallString<128> path_storage;
839 SmallVector<wchar_t, 128> path_utf16;
841 // Convert path to UTF-16.
842 if ((ec = UTF8ToUTF16(path.toStringRef(path_storage), path_utf16)))
845 // Get file handle for creating a file mapping.
846 FileHandle = ::CreateFileW(c_str(path_utf16),
847 Mode == readonly ? GENERIC_READ
848 : GENERIC_READ | GENERIC_WRITE,
849 Mode == readonly ? FILE_SHARE_READ
852 Mode == readonly ? OPEN_EXISTING
854 Mode == readonly ? FILE_ATTRIBUTE_READONLY
855 : FILE_ATTRIBUTE_NORMAL,
857 if (FileHandle == INVALID_HANDLE_VALUE) {
858 ec = windows_error(::GetLastError());
863 ec = init(FileDescriptor, true, offset);
865 Mapping = FileMappingHandle = 0;
866 FileHandle = INVALID_HANDLE_VALUE;
871 mapped_file_region::mapped_file_region(int fd,
881 , FileHandle(INVALID_HANDLE_VALUE)
882 , FileMappingHandle() {
883 FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(fd));
884 if (FileHandle == INVALID_HANDLE_VALUE) {
886 _close(FileDescriptor);
888 ec = make_error_code(errc::bad_file_descriptor);
892 ec = init(FileDescriptor, closefd, offset);
894 Mapping = FileMappingHandle = 0;
895 FileHandle = INVALID_HANDLE_VALUE;
900 mapped_file_region::~mapped_file_region() {
902 ::UnmapViewOfFile(Mapping);
905 #if LLVM_HAS_RVALUE_REFERENCES
906 mapped_file_region::mapped_file_region(mapped_file_region &&other)
909 , Mapping(other.Mapping)
910 , FileDescriptor(other.FileDescriptor)
911 , FileHandle(other.FileHandle)
912 , FileMappingHandle(other.FileMappingHandle) {
913 other.Mapping = other.FileMappingHandle = 0;
914 other.FileHandle = INVALID_HANDLE_VALUE;
915 other.FileDescriptor = 0;
919 mapped_file_region::mapmode mapped_file_region::flags() const {
920 assert(Mapping && "Mapping failed but used anyway!");
924 uint64_t mapped_file_region::size() const {
925 assert(Mapping && "Mapping failed but used anyway!");
929 char *mapped_file_region::data() const {
930 assert(Mode != readonly && "Cannot get non const data for readonly mapping!");
931 assert(Mapping && "Mapping failed but used anyway!");
932 return reinterpret_cast<char*>(Mapping);
935 const char *mapped_file_region::const_data() const {
936 assert(Mapping && "Mapping failed but used anyway!");
937 return reinterpret_cast<const char*>(Mapping);
940 int mapped_file_region::alignment() {
942 ::GetSystemInfo(&SysInfo);
943 return SysInfo.dwAllocationGranularity;
946 error_code detail::directory_iterator_construct(detail::DirIterState &it,
948 SmallVector<wchar_t, 128> path_utf16;
950 if (error_code ec = UTF8ToUTF16(path,
954 // Convert path to the format that Windows is happy with.
955 if (path_utf16.size() > 0 &&
956 !is_separator(path_utf16[path.size() - 1]) &&
957 path_utf16[path.size() - 1] != L':') {
958 path_utf16.push_back(L'\\');
959 path_utf16.push_back(L'*');
961 path_utf16.push_back(L'*');
964 // Get the first directory entry.
965 WIN32_FIND_DATAW FirstFind;
966 ScopedFindHandle FindHandle(::FindFirstFileW(c_str(path_utf16), &FirstFind));
968 return windows_error(::GetLastError());
970 size_t FilenameLen = ::wcslen(FirstFind.cFileName);
971 while ((FilenameLen == 1 && FirstFind.cFileName[0] == L'.') ||
972 (FilenameLen == 2 && FirstFind.cFileName[0] == L'.' &&
973 FirstFind.cFileName[1] == L'.'))
974 if (!::FindNextFileW(FindHandle, &FirstFind)) {
975 error_code ec = windows_error(::GetLastError());
977 if (ec == windows_error::no_more_files)
978 return detail::directory_iterator_destruct(it);
981 FilenameLen = ::wcslen(FirstFind.cFileName);
983 // Construct the current directory entry.
984 SmallString<128> directory_entry_name_utf8;
985 if (error_code ec = UTF16ToUTF8(FirstFind.cFileName,
986 ::wcslen(FirstFind.cFileName),
987 directory_entry_name_utf8))
990 it.IterationHandle = intptr_t(FindHandle.take());
991 SmallString<128> directory_entry_path(path);
992 path::append(directory_entry_path, directory_entry_name_utf8.str());
993 it.CurrentEntry = directory_entry(directory_entry_path.str());
995 return error_code::success();
998 error_code detail::directory_iterator_destruct(detail::DirIterState &it) {
999 if (it.IterationHandle != 0)
1000 // Closes the handle if it's valid.
1001 ScopedFindHandle close(HANDLE(it.IterationHandle));
1002 it.IterationHandle = 0;
1003 it.CurrentEntry = directory_entry();
1004 return error_code::success();
1007 error_code detail::directory_iterator_increment(detail::DirIterState &it) {
1008 WIN32_FIND_DATAW FindData;
1009 if (!::FindNextFileW(HANDLE(it.IterationHandle), &FindData)) {
1010 error_code ec = windows_error(::GetLastError());
1012 if (ec == windows_error::no_more_files)
1013 return detail::directory_iterator_destruct(it);
1017 size_t FilenameLen = ::wcslen(FindData.cFileName);
1018 if ((FilenameLen == 1 && FindData.cFileName[0] == L'.') ||
1019 (FilenameLen == 2 && FindData.cFileName[0] == L'.' &&
1020 FindData.cFileName[1] == L'.'))
1021 return directory_iterator_increment(it);
1023 SmallString<128> directory_entry_path_utf8;
1024 if (error_code ec = UTF16ToUTF8(FindData.cFileName,
1025 ::wcslen(FindData.cFileName),
1026 directory_entry_path_utf8))
1029 it.CurrentEntry.replace_filename(Twine(directory_entry_path_utf8));
1030 return error_code::success();
1033 error_code map_file_pages(const Twine &path, off_t file_offset, size_t size,
1034 bool map_writable, void *&result) {
1035 assert(0 && "NOT IMPLEMENTED");
1036 return windows_error::invalid_function;
1039 error_code unmap_file_pages(void *base, size_t size) {
1040 assert(0 && "NOT IMPLEMENTED");
1041 return windows_error::invalid_function;
1046 } // end namespace fs
1047 } // end namespace sys
1048 } // end namespace llvm