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 = INVALID_HANDLE_VALUE;
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 create_directory(const Twine &path, bool &existed) {
328 SmallString<128> path_storage;
329 SmallVector<wchar_t, 128> path_utf16;
331 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
335 if (!::CreateDirectoryW(path_utf16.begin(), NULL)) {
336 error_code ec = windows_error(::GetLastError());
337 if (ec == windows_error::already_exists)
344 return error_code::success();
347 error_code create_hard_link(const Twine &to, const Twine &from) {
349 SmallString<128> from_storage;
350 SmallString<128> to_storage;
351 StringRef f = from.toStringRef(from_storage);
352 StringRef t = to.toStringRef(to_storage);
354 // Convert to utf-16.
355 SmallVector<wchar_t, 128> wide_from;
356 SmallVector<wchar_t, 128> wide_to;
357 if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
358 if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
360 if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL))
361 return windows_error(::GetLastError());
363 return error_code::success();
366 error_code create_symlink(const Twine &to, const Twine &from) {
367 // Only do it if the function is available at runtime.
368 if (!create_symbolic_link_api)
369 return make_error_code(errc::function_not_supported);
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 (!create_symbolic_link_api(wide_from.begin(), wide_to.begin(), 0))
384 return windows_error(::GetLastError());
386 return error_code::success();
389 error_code remove(const Twine &path, bool &existed) {
390 SmallString<128> path_storage;
391 SmallVector<wchar_t, 128> path_utf16;
394 if (error_code ec = status(path, st))
397 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
401 if (st.type() == file_type::directory_file) {
402 if (!::RemoveDirectoryW(c_str(path_utf16))) {
403 error_code ec = windows_error(::GetLastError());
404 if (ec != windows_error::file_not_found)
410 if (!::DeleteFileW(c_str(path_utf16))) {
411 error_code ec = windows_error(::GetLastError());
412 if (ec != windows_error::file_not_found)
419 return error_code::success();
422 error_code rename(const Twine &from, const Twine &to) {
424 SmallString<128> from_storage;
425 SmallString<128> to_storage;
426 StringRef f = from.toStringRef(from_storage);
427 StringRef t = to.toStringRef(to_storage);
429 // Convert to utf-16.
430 SmallVector<wchar_t, 128> wide_from;
431 SmallVector<wchar_t, 128> wide_to;
432 if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
433 if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
435 error_code ec = error_code::success();
436 for (int i = 0; i < 2000; i++) {
437 if (::MoveFileExW(wide_from.begin(), wide_to.begin(),
438 MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
439 return error_code::success();
440 ec = windows_error(::GetLastError());
441 if (ec != windows_error::access_denied)
443 // Retry MoveFile() at ACCESS_DENIED.
444 // System scanners (eg. indexer) might open the source file when
445 // It is written and closed.
452 error_code resize_file(const Twine &path, uint64_t size) {
453 SmallString<128> path_storage;
454 SmallVector<wchar_t, 128> path_utf16;
456 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
460 int fd = ::_wopen(path_utf16.begin(), O_BINARY | _O_RDWR, S_IWRITE);
462 return error_code(errno, generic_category());
463 #ifdef HAVE__CHSIZE_S
464 errno_t error = ::_chsize_s(fd, size);
466 errno_t error = ::_chsize(fd, size);
469 return error_code(error, generic_category());
472 error_code exists(const Twine &path, bool &result) {
473 SmallString<128> path_storage;
474 SmallVector<wchar_t, 128> path_utf16;
476 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
480 DWORD attributes = ::GetFileAttributesW(path_utf16.begin());
482 if (attributes == INVALID_FILE_ATTRIBUTES) {
483 // See if the file didn't actually exist.
484 error_code ec = make_error_code(windows_error(::GetLastError()));
485 if (ec != windows_error::file_not_found &&
486 ec != windows_error::path_not_found)
491 return error_code::success();
494 bool can_write(const Twine &Path) {
495 // FIXME: take security attributes into account.
496 SmallString<128> PathStorage;
497 SmallVector<wchar_t, 128> PathUtf16;
499 if (UTF8ToUTF16(Path.toStringRef(PathStorage), PathUtf16))
502 DWORD Attr = ::GetFileAttributesW(PathUtf16.begin());
503 return (Attr != INVALID_FILE_ATTRIBUTES) && !(Attr & FILE_ATTRIBUTE_READONLY);
506 bool can_execute(const Twine &Path) {
507 SmallString<128> PathStorage;
508 SmallVector<wchar_t, 128> PathUtf16;
510 if (UTF8ToUTF16(Path.toStringRef(PathStorage), PathUtf16))
513 DWORD Attr = ::GetFileAttributesW(PathUtf16.begin());
514 return Attr != INVALID_FILE_ATTRIBUTES;
517 bool equivalent(file_status A, file_status B) {
518 assert(status_known(A) && status_known(B));
519 return A.FileIndexHigh == B.FileIndexHigh &&
520 A.FileIndexLow == B.FileIndexLow &&
521 A.FileSizeHigh == B.FileSizeHigh &&
522 A.FileSizeLow == B.FileSizeLow &&
523 A.LastWriteTimeHigh == B.LastWriteTimeHigh &&
524 A.LastWriteTimeLow == B.LastWriteTimeLow &&
525 A.VolumeSerialNumber == B.VolumeSerialNumber;
528 error_code equivalent(const Twine &A, const Twine &B, bool &result) {
529 file_status fsA, fsB;
530 if (error_code ec = status(A, fsA)) return ec;
531 if (error_code ec = status(B, fsB)) return ec;
532 result = equivalent(fsA, fsB);
533 return error_code::success();
536 error_code getUniqueID(const Twine Path, uint64_t &Result) {
538 if (error_code E = status(Path, Status))
541 // The file is uniquely identified by the volume serial number along
542 // with the 64-bit file identifier.
543 Result = (static_cast<uint64_t>(Status.FileIndexHigh) << 32ULL) |
544 static_cast<uint64_t>(Status.FileIndexLow);
546 // Because the serial number is 32-bits, but we've already used up all 64
547 // bits for the file index, XOR the serial number into the high 32 bits of
548 // the resulting value. We could potentially get collisons from this, but
549 // the likelihood is low.
550 Result ^= (static_cast<uint64_t>(Status.VolumeSerialNumber) << 32ULL);
552 return error_code::success();
555 static bool isReservedName(StringRef path) {
556 // This list of reserved names comes from MSDN, at:
557 // http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx
558 static const char *sReservedNames[] = { "nul", "con", "prn", "aux",
559 "com1", "com2", "com3", "com4", "com5", "com6",
560 "com7", "com8", "com9", "lpt1", "lpt2", "lpt3",
561 "lpt4", "lpt5", "lpt6", "lpt7", "lpt8", "lpt9" };
563 // First, check to see if this is a device namespace, which always
564 // starts with \\.\, since device namespaces are not legal file paths.
565 if (path.startswith("\\\\.\\"))
568 // Then compare against the list of ancient reserved names
569 for (size_t i = 0; i < array_lengthof(sReservedNames); ++i) {
570 if (path.equals_lower(sReservedNames[i]))
574 // The path isn't what we consider reserved.
578 static error_code getStatus(HANDLE FileHandle, file_status &Result) {
579 if (FileHandle == INVALID_HANDLE_VALUE)
580 goto handle_status_error;
582 switch (::GetFileType(FileHandle)) {
584 llvm_unreachable("Don't know anything about this file type");
585 case FILE_TYPE_UNKNOWN: {
586 DWORD Err = ::GetLastError();
588 return windows_error(Err);
589 Result = file_status(file_type::type_unknown);
590 return error_code::success();
595 Result = file_status(file_type::character_file);
596 return error_code::success();
598 Result = file_status(file_type::fifo_file);
599 return error_code::success();
602 BY_HANDLE_FILE_INFORMATION Info;
603 if (!::GetFileInformationByHandle(FileHandle, &Info))
604 goto handle_status_error;
606 Result = file_status(
607 file_type::regular_file, Info.ftLastWriteTime.dwHighDateTime,
608 Info.ftLastWriteTime.dwLowDateTime, Info.dwVolumeSerialNumber,
609 Info.nFileSizeHigh, Info.nFileSizeLow, Info.nFileIndexHigh,
611 return error_code::success();
614 error_code EC = windows_error(::GetLastError());
615 if (EC == windows_error::file_not_found ||
616 EC == windows_error::path_not_found)
617 Result = file_status(file_type::file_not_found);
618 else if (EC == windows_error::sharing_violation)
619 Result = file_status(file_type::type_unknown);
621 Result = file_status(file_type::status_error);
624 return error_code::success();
627 error_code status(const Twine &path, file_status &result) {
628 SmallString<128> path_storage;
629 SmallVector<wchar_t, 128> path_utf16;
631 StringRef path8 = path.toStringRef(path_storage);
632 if (isReservedName(path8)) {
633 result = file_status(file_type::character_file);
634 return error_code::success();
637 if (error_code ec = UTF8ToUTF16(path8, path_utf16))
640 DWORD attr = ::GetFileAttributesW(path_utf16.begin());
641 if (attr == INVALID_FILE_ATTRIBUTES)
642 return getStatus(INVALID_HANDLE_VALUE, result);
644 // Handle reparse points.
645 if (attr & FILE_ATTRIBUTE_REPARSE_POINT) {
647 ::CreateFileW(path_utf16.begin(),
648 0, // Attributes only.
649 FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
652 FILE_FLAG_BACKUP_SEMANTICS,
655 return getStatus(INVALID_HANDLE_VALUE, result);
658 if (attr & FILE_ATTRIBUTE_DIRECTORY)
659 result = file_status(file_type::directory_file);
662 ::CreateFileW(path_utf16.begin(),
663 0, // Attributes only.
664 FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
667 FILE_FLAG_BACKUP_SEMANTICS,
670 return getStatus(INVALID_HANDLE_VALUE, result);
671 BY_HANDLE_FILE_INFORMATION Info;
672 if (!::GetFileInformationByHandle(h, &Info))
673 return getStatus(INVALID_HANDLE_VALUE, result);
675 return getStatus(h, result);
677 return error_code::success();
680 error_code status(int FD, file_status &Result) {
681 HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
682 return getStatus(FileHandle, Result);
685 error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
687 UI.QuadPart = Time.toWin32Time();
689 FT.dwLowDateTime = UI.LowPart;
690 FT.dwHighDateTime = UI.HighPart;
691 HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
692 if (!SetFileTime(FileHandle, NULL, &FT, &FT))
693 return windows_error(::GetLastError());
694 return error_code::success();
697 error_code get_magic(const Twine &path, uint32_t len,
698 SmallVectorImpl<char> &result) {
699 SmallString<128> path_storage;
700 SmallVector<wchar_t, 128> path_utf16;
703 // Convert path to UTF-16.
704 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
709 HANDLE file = ::CreateFileW(c_str(path_utf16),
714 FILE_ATTRIBUTE_READONLY,
716 if (file == INVALID_HANDLE_VALUE)
717 return windows_error(::GetLastError());
723 DWORD bytes_read = 0;
724 BOOL read_success = ::ReadFile(file, result.data(), len, &bytes_read, NULL);
725 error_code ec = windows_error(::GetLastError());
727 if (!read_success || (bytes_read != len)) {
728 // Set result size to the number of bytes read if it's valid.
729 if (bytes_read <= len)
730 result.set_size(bytes_read);
731 // ERROR_HANDLE_EOF is mapped to errc::value_too_large.
735 result.set_size(len);
736 return error_code::success();
739 error_code mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) {
741 // Make sure that the requested size fits within SIZE_T.
742 if (Size > std::numeric_limits<SIZE_T>::max()) {
743 if (FileDescriptor) {
745 _close(FileDescriptor);
747 ::CloseHandle(FileHandle);
748 return make_error_code(errc::invalid_argument);
753 case readonly: flprotect = PAGE_READONLY; break;
754 case readwrite: flprotect = PAGE_READWRITE; break;
755 case priv: flprotect = PAGE_WRITECOPY; break;
758 FileMappingHandle = ::CreateFileMapping(FileHandle,
764 if (FileMappingHandle == NULL) {
765 error_code ec = windows_error(GetLastError());
766 if (FileDescriptor) {
768 _close(FileDescriptor);
770 ::CloseHandle(FileHandle);
774 DWORD dwDesiredAccess;
776 case readonly: dwDesiredAccess = FILE_MAP_READ; break;
777 case readwrite: dwDesiredAccess = FILE_MAP_WRITE; break;
778 case priv: dwDesiredAccess = FILE_MAP_COPY; break;
780 Mapping = ::MapViewOfFile(FileMappingHandle,
785 if (Mapping == NULL) {
786 error_code ec = windows_error(GetLastError());
787 ::CloseHandle(FileMappingHandle);
788 if (FileDescriptor) {
790 _close(FileDescriptor);
792 ::CloseHandle(FileHandle);
797 MEMORY_BASIC_INFORMATION mbi;
798 SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi));
800 error_code ec = windows_error(GetLastError());
801 ::UnmapViewOfFile(Mapping);
802 ::CloseHandle(FileMappingHandle);
803 if (FileDescriptor) {
805 _close(FileDescriptor);
807 ::CloseHandle(FileHandle);
810 Size = mbi.RegionSize;
813 // Close all the handles except for the view. It will keep the other handles
815 ::CloseHandle(FileMappingHandle);
816 if (FileDescriptor) {
818 _close(FileDescriptor); // Also closes FileHandle.
820 ::CloseHandle(FileHandle);
821 return error_code::success();
824 mapped_file_region::mapped_file_region(const Twine &path,
833 , FileHandle(INVALID_HANDLE_VALUE)
834 , FileMappingHandle() {
835 SmallString<128> path_storage;
836 SmallVector<wchar_t, 128> path_utf16;
838 // Convert path to UTF-16.
839 if ((ec = UTF8ToUTF16(path.toStringRef(path_storage), path_utf16)))
842 // Get file handle for creating a file mapping.
843 FileHandle = ::CreateFileW(c_str(path_utf16),
844 Mode == readonly ? GENERIC_READ
845 : GENERIC_READ | GENERIC_WRITE,
846 Mode == readonly ? FILE_SHARE_READ
849 Mode == readonly ? OPEN_EXISTING
851 Mode == readonly ? FILE_ATTRIBUTE_READONLY
852 : FILE_ATTRIBUTE_NORMAL,
854 if (FileHandle == INVALID_HANDLE_VALUE) {
855 ec = windows_error(::GetLastError());
860 ec = init(FileDescriptor, true, offset);
862 Mapping = FileMappingHandle = 0;
863 FileHandle = INVALID_HANDLE_VALUE;
868 mapped_file_region::mapped_file_region(int fd,
878 , FileHandle(INVALID_HANDLE_VALUE)
879 , FileMappingHandle() {
880 FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(fd));
881 if (FileHandle == INVALID_HANDLE_VALUE) {
883 _close(FileDescriptor);
885 ec = make_error_code(errc::bad_file_descriptor);
889 ec = init(FileDescriptor, closefd, offset);
891 Mapping = FileMappingHandle = 0;
892 FileHandle = INVALID_HANDLE_VALUE;
897 mapped_file_region::~mapped_file_region() {
899 ::UnmapViewOfFile(Mapping);
902 #if LLVM_HAS_RVALUE_REFERENCES
903 mapped_file_region::mapped_file_region(mapped_file_region &&other)
906 , Mapping(other.Mapping)
907 , FileDescriptor(other.FileDescriptor)
908 , FileHandle(other.FileHandle)
909 , FileMappingHandle(other.FileMappingHandle) {
910 other.Mapping = other.FileMappingHandle = 0;
911 other.FileHandle = INVALID_HANDLE_VALUE;
912 other.FileDescriptor = 0;
916 mapped_file_region::mapmode mapped_file_region::flags() const {
917 assert(Mapping && "Mapping failed but used anyway!");
921 uint64_t mapped_file_region::size() const {
922 assert(Mapping && "Mapping failed but used anyway!");
926 char *mapped_file_region::data() const {
927 assert(Mode != readonly && "Cannot get non const data for readonly mapping!");
928 assert(Mapping && "Mapping failed but used anyway!");
929 return reinterpret_cast<char*>(Mapping);
932 const char *mapped_file_region::const_data() const {
933 assert(Mapping && "Mapping failed but used anyway!");
934 return reinterpret_cast<const char*>(Mapping);
937 int mapped_file_region::alignment() {
939 ::GetSystemInfo(&SysInfo);
940 return SysInfo.dwAllocationGranularity;
943 error_code detail::directory_iterator_construct(detail::DirIterState &it,
945 SmallVector<wchar_t, 128> path_utf16;
947 if (error_code ec = UTF8ToUTF16(path,
951 // Convert path to the format that Windows is happy with.
952 if (path_utf16.size() > 0 &&
953 !is_separator(path_utf16[path.size() - 1]) &&
954 path_utf16[path.size() - 1] != L':') {
955 path_utf16.push_back(L'\\');
956 path_utf16.push_back(L'*');
958 path_utf16.push_back(L'*');
961 // Get the first directory entry.
962 WIN32_FIND_DATAW FirstFind;
963 ScopedFindHandle FindHandle(::FindFirstFileW(c_str(path_utf16), &FirstFind));
965 return windows_error(::GetLastError());
967 size_t FilenameLen = ::wcslen(FirstFind.cFileName);
968 while ((FilenameLen == 1 && FirstFind.cFileName[0] == L'.') ||
969 (FilenameLen == 2 && FirstFind.cFileName[0] == L'.' &&
970 FirstFind.cFileName[1] == L'.'))
971 if (!::FindNextFileW(FindHandle, &FirstFind)) {
972 error_code ec = windows_error(::GetLastError());
974 if (ec == windows_error::no_more_files)
975 return detail::directory_iterator_destruct(it);
978 FilenameLen = ::wcslen(FirstFind.cFileName);
980 // Construct the current directory entry.
981 SmallString<128> directory_entry_name_utf8;
982 if (error_code ec = UTF16ToUTF8(FirstFind.cFileName,
983 ::wcslen(FirstFind.cFileName),
984 directory_entry_name_utf8))
987 it.IterationHandle = intptr_t(FindHandle.take());
988 SmallString<128> directory_entry_path(path);
989 path::append(directory_entry_path, directory_entry_name_utf8.str());
990 it.CurrentEntry = directory_entry(directory_entry_path.str());
992 return error_code::success();
995 error_code detail::directory_iterator_destruct(detail::DirIterState &it) {
996 if (it.IterationHandle != 0)
997 // Closes the handle if it's valid.
998 ScopedFindHandle close(HANDLE(it.IterationHandle));
999 it.IterationHandle = 0;
1000 it.CurrentEntry = directory_entry();
1001 return error_code::success();
1004 error_code detail::directory_iterator_increment(detail::DirIterState &it) {
1005 WIN32_FIND_DATAW FindData;
1006 if (!::FindNextFileW(HANDLE(it.IterationHandle), &FindData)) {
1007 error_code ec = windows_error(::GetLastError());
1009 if (ec == windows_error::no_more_files)
1010 return detail::directory_iterator_destruct(it);
1014 size_t FilenameLen = ::wcslen(FindData.cFileName);
1015 if ((FilenameLen == 1 && FindData.cFileName[0] == L'.') ||
1016 (FilenameLen == 2 && FindData.cFileName[0] == L'.' &&
1017 FindData.cFileName[1] == L'.'))
1018 return directory_iterator_increment(it);
1020 SmallString<128> directory_entry_path_utf8;
1021 if (error_code ec = UTF16ToUTF8(FindData.cFileName,
1022 ::wcslen(FindData.cFileName),
1023 directory_entry_path_utf8))
1026 it.CurrentEntry.replace_filename(Twine(directory_entry_path_utf8));
1027 return error_code::success();
1030 error_code map_file_pages(const Twine &path, off_t file_offset, size_t size,
1031 bool map_writable, void *&result) {
1032 assert(0 && "NOT IMPLEMENTED");
1033 return windows_error::invalid_function;
1036 error_code unmap_file_pages(void *base, size_t size) {
1037 assert(0 && "NOT IMPLEMENTED");
1038 return windows_error::invalid_function;
1041 error_code openFileForRead(const Twine &Name, int &ResultFD) {
1042 SmallString<128> PathStorage;
1043 SmallVector<wchar_t, 128> PathUTF16;
1045 if (error_code EC = UTF8ToUTF16(Name.toStringRef(PathStorage),
1049 HANDLE H = ::CreateFileW(PathUTF16.begin(), GENERIC_READ,
1050 FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
1051 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
1052 if (H == INVALID_HANDLE_VALUE) {
1053 error_code EC = windows_error(::GetLastError());
1054 // Provide a better error message when trying to open directories.
1055 // This only runs if we failed to open the file, so there is probably
1056 // no performances issues.
1057 if (EC != windows_error::access_denied)
1059 if (is_directory(Name))
1060 return error_code(errc::is_a_directory, posix_category());
1064 int FD = ::_open_osfhandle(intptr_t(H), 0);
1067 return windows_error::invalid_handle;
1071 return error_code::success();
1074 error_code openFileForWrite(const Twine &Name, int &ResultFD,
1075 sys::fs::OpenFlags Flags, unsigned Mode) {
1076 // Verify that we don't have both "append" and "excl".
1077 assert((!(Flags & sys::fs::F_Excl) || !(Flags & sys::fs::F_Append)) &&
1078 "Cannot specify both 'excl' and 'append' file creation flags!");
1080 SmallString<128> PathStorage;
1081 SmallVector<wchar_t, 128> PathUTF16;
1083 if (error_code EC = UTF8ToUTF16(Name.toStringRef(PathStorage),
1087 DWORD CreationDisposition;
1089 CreationDisposition = CREATE_NEW;
1090 else if (Flags & F_Append)
1091 CreationDisposition = OPEN_ALWAYS;
1093 CreationDisposition = CREATE_ALWAYS;
1095 HANDLE H = ::CreateFileW(PathUTF16.begin(), GENERIC_WRITE,
1096 FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
1097 CreationDisposition, FILE_ATTRIBUTE_NORMAL, NULL);
1099 if (H == INVALID_HANDLE_VALUE) {
1100 error_code EC = windows_error(::GetLastError());
1101 // Provide a better error message when trying to open directories.
1102 // This only runs if we failed to open the file, so there is probably
1103 // no performances issues.
1104 if (EC != windows_error::access_denied)
1106 if (is_directory(Name))
1107 return error_code(errc::is_a_directory, posix_category());
1112 if (Flags & F_Append)
1113 OpenFlags |= _O_APPEND;
1115 if (!(Flags & F_Binary))
1116 OpenFlags |= _O_TEXT;
1118 int FD = ::_open_osfhandle(intptr_t(H), OpenFlags);
1121 return windows_error::invalid_handle;
1125 return error_code::success();
1128 } // end namespace fs
1129 } // end namespace sys
1130 } // end namespace llvm