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"
20 #include "llvm/Support/WindowsError.h"
24 #include <sys/types.h>
26 // These two headers must be included last, and make sure shlobj is required
27 // after Windows.h to make sure it picks up our definition of _WIN32_WINNT
28 #include "WindowsSupport.h"
33 // MinGW doesn't define this.
34 #ifndef _ERRNO_T_DEFINED
35 #define _ERRNO_T_DEFINED
40 # pragma comment(lib, "advapi32.lib") // This provides CryptAcquireContextW.
45 using llvm::sys::windows::UTF8ToUTF16;
46 using llvm::sys::windows::UTF16ToUTF8;
48 static error_code windows_error(DWORD E) {
49 return mapWindowsError(E);
52 static error_code TempDir(SmallVectorImpl<char> &Result) {
53 SmallVector<wchar_t, 64> Res;
55 DWORD Len = ::GetTempPathW(Res.capacity(), Res.begin());
58 return windows_error(::GetLastError());
60 if (Len > Res.capacity()) {
66 return UTF16ToUTF8(Res.begin(), Res.size(), Result);
69 static bool is_separator(const wchar_t value) {
83 std::string getMainExecutable(const char *argv0, void *MainExecAddr) {
84 SmallVector<wchar_t, MAX_PATH> PathName;
85 DWORD Size = ::GetModuleFileNameW(NULL, PathName.data(), PathName.capacity());
87 // A zero return value indicates a failure other than insufficient space.
91 // Insufficient space is determined by a return value equal to the size of
92 // the buffer passed in.
93 if (Size == PathName.capacity())
96 // On success, GetModuleFileNameW returns the number of characters written to
97 // the buffer not including the NULL terminator.
98 PathName.set_size(Size);
100 // Convert the result from UTF-16 to UTF-8.
101 SmallVector<char, MAX_PATH> PathNameUTF8;
102 if (UTF16ToUTF8(PathName.data(), PathName.size(), PathNameUTF8))
105 return std::string(PathNameUTF8.data());
108 UniqueID file_status::getUniqueID() const {
109 // The file is uniquely identified by the volume serial number along
110 // with the 64-bit file identifier.
111 uint64_t FileID = (static_cast<uint64_t>(FileIndexHigh) << 32ULL) |
112 static_cast<uint64_t>(FileIndexLow);
114 return UniqueID(VolumeSerialNumber, FileID);
117 TimeValue file_status::getLastModificationTime() const {
119 UI.LowPart = LastWriteTimeLow;
120 UI.HighPart = LastWriteTimeHigh;
123 Ret.fromWin32Time(UI.QuadPart);
127 error_code current_path(SmallVectorImpl<char> &result) {
128 SmallVector<wchar_t, MAX_PATH> cur_path;
129 DWORD len = MAX_PATH;
132 cur_path.reserve(len);
133 len = ::GetCurrentDirectoryW(cur_path.capacity(), cur_path.data());
135 // A zero return value indicates a failure other than insufficient space.
137 return windows_error(::GetLastError());
139 // If there's insufficient space, the len returned is larger than the len
141 } while (len > cur_path.capacity());
143 // On success, GetCurrentDirectoryW returns the number of characters not
144 // including the null-terminator.
145 cur_path.set_size(len);
146 return UTF16ToUTF8(cur_path.begin(), cur_path.size(), result);
149 error_code create_directory(const Twine &path, bool IgnoreExisting) {
150 SmallString<128> path_storage;
151 SmallVector<wchar_t, 128> path_utf16;
153 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
157 if (!::CreateDirectoryW(path_utf16.begin(), NULL)) {
158 DWORD LastError = ::GetLastError();
159 if (LastError != ERROR_ALREADY_EXISTS || !IgnoreExisting)
160 return windows_error(LastError);
166 error_code normalize_separators(SmallVectorImpl<char> &Path) {
171 // We can't use symbolic links for windows.
172 error_code create_link(const Twine &to, const Twine &from) {
174 SmallString<128> from_storage;
175 SmallString<128> to_storage;
176 StringRef f = from.toStringRef(from_storage);
177 StringRef t = to.toStringRef(to_storage);
179 // Convert to utf-16.
180 SmallVector<wchar_t, 128> wide_from;
181 SmallVector<wchar_t, 128> wide_to;
182 if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
183 if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
185 if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL))
186 return windows_error(::GetLastError());
191 error_code remove(const Twine &path, bool IgnoreNonExisting) {
192 SmallString<128> path_storage;
193 SmallVector<wchar_t, 128> path_utf16;
196 if (error_code EC = status(path, ST)) {
197 if (EC != std::errc::no_such_file_or_directory || !IgnoreNonExisting)
202 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
206 if (ST.type() == file_type::directory_file) {
207 if (!::RemoveDirectoryW(c_str(path_utf16))) {
208 error_code EC = windows_error(::GetLastError());
209 if (EC != std::errc::no_such_file_or_directory || !IgnoreNonExisting)
214 if (!::DeleteFileW(c_str(path_utf16))) {
215 error_code EC = windows_error(::GetLastError());
216 if (EC != std::errc::no_such_file_or_directory || !IgnoreNonExisting)
222 error_code rename(const Twine &from, const Twine &to) {
224 SmallString<128> from_storage;
225 SmallString<128> to_storage;
226 StringRef f = from.toStringRef(from_storage);
227 StringRef t = to.toStringRef(to_storage);
229 // Convert to utf-16.
230 SmallVector<wchar_t, 128> wide_from;
231 SmallVector<wchar_t, 128> wide_to;
232 if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
233 if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
235 error_code ec = error_code();
236 for (int i = 0; i < 2000; i++) {
237 if (::MoveFileExW(wide_from.begin(), wide_to.begin(),
238 MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
240 DWORD LastError = ::GetLastError();
241 if (LastError != ERROR_ACCESS_DENIED)
243 // Retry MoveFile() at ACCESS_DENIED.
244 // System scanners (eg. indexer) might open the source file when
245 // It is written and closed.
252 error_code resize_file(const Twine &path, uint64_t size) {
253 SmallString<128> path_storage;
254 SmallVector<wchar_t, 128> path_utf16;
256 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
260 int fd = ::_wopen(path_utf16.begin(), O_BINARY | _O_RDWR, S_IWRITE);
262 return error_code(errno, generic_category());
263 #ifdef HAVE__CHSIZE_S
264 errno_t error = ::_chsize_s(fd, size);
266 errno_t error = ::_chsize(fd, size);
269 return error_code(error, generic_category());
272 error_code exists(const Twine &path, bool &result) {
273 SmallString<128> path_storage;
274 SmallVector<wchar_t, 128> path_utf16;
276 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
280 DWORD attributes = ::GetFileAttributesW(path_utf16.begin());
282 if (attributes == INVALID_FILE_ATTRIBUTES) {
283 // See if the file didn't actually exist.
284 DWORD LastError = ::GetLastError();
285 if (LastError != ERROR_FILE_NOT_FOUND &&
286 LastError != ERROR_PATH_NOT_FOUND)
287 return windows_error(LastError);
294 bool can_write(const Twine &Path) {
295 // FIXME: take security attributes into account.
296 SmallString<128> PathStorage;
297 SmallVector<wchar_t, 128> PathUtf16;
299 if (UTF8ToUTF16(Path.toStringRef(PathStorage), PathUtf16))
302 DWORD Attr = ::GetFileAttributesW(PathUtf16.begin());
303 return (Attr != INVALID_FILE_ATTRIBUTES) && !(Attr & FILE_ATTRIBUTE_READONLY);
306 bool can_execute(const Twine &Path) {
307 SmallString<128> PathStorage;
308 SmallVector<wchar_t, 128> PathUtf16;
310 if (UTF8ToUTF16(Path.toStringRef(PathStorage), PathUtf16))
313 DWORD Attr = ::GetFileAttributesW(PathUtf16.begin());
314 return Attr != INVALID_FILE_ATTRIBUTES;
317 bool equivalent(file_status A, file_status B) {
318 assert(status_known(A) && status_known(B));
319 return A.FileIndexHigh == B.FileIndexHigh &&
320 A.FileIndexLow == B.FileIndexLow &&
321 A.FileSizeHigh == B.FileSizeHigh &&
322 A.FileSizeLow == B.FileSizeLow &&
323 A.LastWriteTimeHigh == B.LastWriteTimeHigh &&
324 A.LastWriteTimeLow == B.LastWriteTimeLow &&
325 A.VolumeSerialNumber == B.VolumeSerialNumber;
328 error_code equivalent(const Twine &A, const Twine &B, bool &result) {
329 file_status fsA, fsB;
330 if (error_code ec = status(A, fsA)) return ec;
331 if (error_code ec = status(B, fsB)) return ec;
332 result = equivalent(fsA, fsB);
336 static bool isReservedName(StringRef path) {
337 // This list of reserved names comes from MSDN, at:
338 // http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx
339 static const char *sReservedNames[] = { "nul", "con", "prn", "aux",
340 "com1", "com2", "com3", "com4", "com5", "com6",
341 "com7", "com8", "com9", "lpt1", "lpt2", "lpt3",
342 "lpt4", "lpt5", "lpt6", "lpt7", "lpt8", "lpt9" };
344 // First, check to see if this is a device namespace, which always
345 // starts with \\.\, since device namespaces are not legal file paths.
346 if (path.startswith("\\\\.\\"))
349 // Then compare against the list of ancient reserved names
350 for (size_t i = 0; i < array_lengthof(sReservedNames); ++i) {
351 if (path.equals_lower(sReservedNames[i]))
355 // The path isn't what we consider reserved.
359 static error_code getStatus(HANDLE FileHandle, file_status &Result) {
360 if (FileHandle == INVALID_HANDLE_VALUE)
361 goto handle_status_error;
363 switch (::GetFileType(FileHandle)) {
365 llvm_unreachable("Don't know anything about this file type");
366 case FILE_TYPE_UNKNOWN: {
367 DWORD Err = ::GetLastError();
369 return windows_error(Err);
370 Result = file_status(file_type::type_unknown);
376 Result = file_status(file_type::character_file);
379 Result = file_status(file_type::fifo_file);
383 BY_HANDLE_FILE_INFORMATION Info;
384 if (!::GetFileInformationByHandle(FileHandle, &Info))
385 goto handle_status_error;
388 file_type Type = (Info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
389 ? file_type::directory_file
390 : file_type::regular_file;
392 file_status(Type, Info.ftLastWriteTime.dwHighDateTime,
393 Info.ftLastWriteTime.dwLowDateTime,
394 Info.dwVolumeSerialNumber, Info.nFileSizeHigh,
395 Info.nFileSizeLow, Info.nFileIndexHigh, Info.nFileIndexLow);
400 DWORD LastError = ::GetLastError();
401 if (LastError == ERROR_FILE_NOT_FOUND ||
402 LastError == ERROR_PATH_NOT_FOUND)
403 Result = file_status(file_type::file_not_found);
404 else if (LastError == ERROR_SHARING_VIOLATION)
405 Result = file_status(file_type::type_unknown);
407 Result = file_status(file_type::status_error);
408 return windows_error(LastError);
411 error_code status(const Twine &path, file_status &result) {
412 SmallString<128> path_storage;
413 SmallVector<wchar_t, 128> path_utf16;
415 StringRef path8 = path.toStringRef(path_storage);
416 if (isReservedName(path8)) {
417 result = file_status(file_type::character_file);
421 if (error_code ec = UTF8ToUTF16(path8, path_utf16))
424 DWORD attr = ::GetFileAttributesW(path_utf16.begin());
425 if (attr == INVALID_FILE_ATTRIBUTES)
426 return getStatus(INVALID_HANDLE_VALUE, result);
428 // Handle reparse points.
429 if (attr & FILE_ATTRIBUTE_REPARSE_POINT) {
431 ::CreateFileW(path_utf16.begin(),
432 0, // Attributes only.
433 FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
436 FILE_FLAG_BACKUP_SEMANTICS,
439 return getStatus(INVALID_HANDLE_VALUE, result);
443 ::CreateFileW(path_utf16.begin(), 0, // Attributes only.
444 FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
445 NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0));
447 return getStatus(INVALID_HANDLE_VALUE, result);
449 return getStatus(h, result);
452 error_code status(int FD, file_status &Result) {
453 HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
454 return getStatus(FileHandle, Result);
457 error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
459 UI.QuadPart = Time.toWin32Time();
461 FT.dwLowDateTime = UI.LowPart;
462 FT.dwHighDateTime = UI.HighPart;
463 HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
464 if (!SetFileTime(FileHandle, NULL, &FT, &FT))
465 return windows_error(::GetLastError());
469 error_code get_magic(const Twine &path, uint32_t len,
470 SmallVectorImpl<char> &result) {
471 SmallString<128> path_storage;
472 SmallVector<wchar_t, 128> path_utf16;
475 // Convert path to UTF-16.
476 if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
481 HANDLE file = ::CreateFileW(c_str(path_utf16),
486 FILE_ATTRIBUTE_READONLY,
488 if (file == INVALID_HANDLE_VALUE)
489 return windows_error(::GetLastError());
495 DWORD bytes_read = 0;
496 BOOL read_success = ::ReadFile(file, result.data(), len, &bytes_read, NULL);
497 error_code ec = windows_error(::GetLastError());
499 if (!read_success || (bytes_read != len)) {
500 // Set result size to the number of bytes read if it's valid.
501 if (bytes_read <= len)
502 result.set_size(bytes_read);
503 // ERROR_HANDLE_EOF is mapped to errc::value_too_large.
507 result.set_size(len);
511 error_code mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) {
513 // Make sure that the requested size fits within SIZE_T.
514 if (Size > std::numeric_limits<SIZE_T>::max()) {
515 if (FileDescriptor) {
517 _close(FileDescriptor);
519 ::CloseHandle(FileHandle);
520 return make_error_code(std::errc::invalid_argument);
525 case readonly: flprotect = PAGE_READONLY; break;
526 case readwrite: flprotect = PAGE_READWRITE; break;
527 case priv: flprotect = PAGE_WRITECOPY; break;
531 ::CreateFileMappingW(FileHandle, 0, flprotect,
532 (Offset + Size) >> 32,
533 (Offset + Size) & 0xffffffff,
535 if (FileMappingHandle == NULL) {
536 error_code ec = windows_error(GetLastError());
537 if (FileDescriptor) {
539 _close(FileDescriptor);
541 ::CloseHandle(FileHandle);
545 DWORD dwDesiredAccess;
547 case readonly: dwDesiredAccess = FILE_MAP_READ; break;
548 case readwrite: dwDesiredAccess = FILE_MAP_WRITE; break;
549 case priv: dwDesiredAccess = FILE_MAP_COPY; break;
551 Mapping = ::MapViewOfFile(FileMappingHandle,
556 if (Mapping == NULL) {
557 error_code ec = windows_error(GetLastError());
558 ::CloseHandle(FileMappingHandle);
559 if (FileDescriptor) {
561 _close(FileDescriptor);
563 ::CloseHandle(FileHandle);
568 MEMORY_BASIC_INFORMATION mbi;
569 SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi));
571 error_code ec = windows_error(GetLastError());
572 ::UnmapViewOfFile(Mapping);
573 ::CloseHandle(FileMappingHandle);
574 if (FileDescriptor) {
576 _close(FileDescriptor);
578 ::CloseHandle(FileHandle);
581 Size = mbi.RegionSize;
584 // Close all the handles except for the view. It will keep the other handles
586 ::CloseHandle(FileMappingHandle);
587 if (FileDescriptor) {
589 _close(FileDescriptor); // Also closes FileHandle.
591 ::CloseHandle(FileHandle);
595 mapped_file_region::mapped_file_region(const Twine &path,
604 , FileHandle(INVALID_HANDLE_VALUE)
605 , FileMappingHandle() {
606 SmallString<128> path_storage;
607 SmallVector<wchar_t, 128> path_utf16;
609 // Convert path to UTF-16.
610 if ((ec = UTF8ToUTF16(path.toStringRef(path_storage), path_utf16)))
613 // Get file handle for creating a file mapping.
614 FileHandle = ::CreateFileW(c_str(path_utf16),
615 Mode == readonly ? GENERIC_READ
616 : GENERIC_READ | GENERIC_WRITE,
617 Mode == readonly ? FILE_SHARE_READ
620 Mode == readonly ? OPEN_EXISTING
622 Mode == readonly ? FILE_ATTRIBUTE_READONLY
623 : FILE_ATTRIBUTE_NORMAL,
625 if (FileHandle == INVALID_HANDLE_VALUE) {
626 ec = windows_error(::GetLastError());
631 ec = init(FileDescriptor, true, offset);
633 Mapping = FileMappingHandle = 0;
634 FileHandle = INVALID_HANDLE_VALUE;
639 mapped_file_region::mapped_file_region(int fd,
649 , FileHandle(INVALID_HANDLE_VALUE)
650 , FileMappingHandle() {
651 FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(fd));
652 if (FileHandle == INVALID_HANDLE_VALUE) {
654 _close(FileDescriptor);
656 ec = make_error_code(std::errc::bad_file_descriptor);
660 ec = init(FileDescriptor, closefd, offset);
662 Mapping = FileMappingHandle = 0;
663 FileHandle = INVALID_HANDLE_VALUE;
668 mapped_file_region::~mapped_file_region() {
670 ::UnmapViewOfFile(Mapping);
673 mapped_file_region::mapped_file_region(mapped_file_region &&other)
676 , Mapping(other.Mapping)
677 , FileDescriptor(other.FileDescriptor)
678 , FileHandle(other.FileHandle)
679 , FileMappingHandle(other.FileMappingHandle) {
680 other.Mapping = other.FileMappingHandle = 0;
681 other.FileHandle = INVALID_HANDLE_VALUE;
682 other.FileDescriptor = 0;
685 mapped_file_region::mapmode mapped_file_region::flags() const {
686 assert(Mapping && "Mapping failed but used anyway!");
690 uint64_t mapped_file_region::size() const {
691 assert(Mapping && "Mapping failed but used anyway!");
695 char *mapped_file_region::data() const {
696 assert(Mode != readonly && "Cannot get non-const data for readonly mapping!");
697 assert(Mapping && "Mapping failed but used anyway!");
698 return reinterpret_cast<char*>(Mapping);
701 const char *mapped_file_region::const_data() const {
702 assert(Mapping && "Mapping failed but used anyway!");
703 return reinterpret_cast<const char*>(Mapping);
706 int mapped_file_region::alignment() {
708 ::GetSystemInfo(&SysInfo);
709 return SysInfo.dwAllocationGranularity;
712 error_code detail::directory_iterator_construct(detail::DirIterState &it,
714 SmallVector<wchar_t, 128> path_utf16;
716 if (error_code ec = UTF8ToUTF16(path,
720 // Convert path to the format that Windows is happy with.
721 if (path_utf16.size() > 0 &&
722 !is_separator(path_utf16[path.size() - 1]) &&
723 path_utf16[path.size() - 1] != L':') {
724 path_utf16.push_back(L'\\');
725 path_utf16.push_back(L'*');
727 path_utf16.push_back(L'*');
730 // Get the first directory entry.
731 WIN32_FIND_DATAW FirstFind;
732 ScopedFindHandle FindHandle(::FindFirstFileW(c_str(path_utf16), &FirstFind));
734 return windows_error(::GetLastError());
736 size_t FilenameLen = ::wcslen(FirstFind.cFileName);
737 while ((FilenameLen == 1 && FirstFind.cFileName[0] == L'.') ||
738 (FilenameLen == 2 && FirstFind.cFileName[0] == L'.' &&
739 FirstFind.cFileName[1] == L'.'))
740 if (!::FindNextFileW(FindHandle, &FirstFind)) {
741 DWORD LastError = ::GetLastError();
743 if (LastError == ERROR_NO_MORE_FILES)
744 return detail::directory_iterator_destruct(it);
745 return windows_error(LastError);
747 FilenameLen = ::wcslen(FirstFind.cFileName);
749 // Construct the current directory entry.
750 SmallString<128> directory_entry_name_utf8;
751 if (error_code ec = UTF16ToUTF8(FirstFind.cFileName,
752 ::wcslen(FirstFind.cFileName),
753 directory_entry_name_utf8))
756 it.IterationHandle = intptr_t(FindHandle.take());
757 SmallString<128> directory_entry_path(path);
758 path::append(directory_entry_path, directory_entry_name_utf8.str());
759 it.CurrentEntry = directory_entry(directory_entry_path.str());
764 error_code detail::directory_iterator_destruct(detail::DirIterState &it) {
765 if (it.IterationHandle != 0)
766 // Closes the handle if it's valid.
767 ScopedFindHandle close(HANDLE(it.IterationHandle));
768 it.IterationHandle = 0;
769 it.CurrentEntry = directory_entry();
773 error_code detail::directory_iterator_increment(detail::DirIterState &it) {
774 WIN32_FIND_DATAW FindData;
775 if (!::FindNextFileW(HANDLE(it.IterationHandle), &FindData)) {
776 DWORD LastError = ::GetLastError();
778 if (LastError == ERROR_NO_MORE_FILES)
779 return detail::directory_iterator_destruct(it);
780 return windows_error(LastError);
783 size_t FilenameLen = ::wcslen(FindData.cFileName);
784 if ((FilenameLen == 1 && FindData.cFileName[0] == L'.') ||
785 (FilenameLen == 2 && FindData.cFileName[0] == L'.' &&
786 FindData.cFileName[1] == L'.'))
787 return directory_iterator_increment(it);
789 SmallString<128> directory_entry_path_utf8;
790 if (error_code ec = UTF16ToUTF8(FindData.cFileName,
791 ::wcslen(FindData.cFileName),
792 directory_entry_path_utf8))
795 it.CurrentEntry.replace_filename(Twine(directory_entry_path_utf8));
799 error_code openFileForRead(const Twine &Name, int &ResultFD) {
800 SmallString<128> PathStorage;
801 SmallVector<wchar_t, 128> PathUTF16;
803 if (error_code EC = UTF8ToUTF16(Name.toStringRef(PathStorage),
807 HANDLE H = ::CreateFileW(PathUTF16.begin(), GENERIC_READ,
808 FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
809 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
810 if (H == INVALID_HANDLE_VALUE) {
811 DWORD LastError = ::GetLastError();
812 error_code EC = windows_error(LastError);
813 // Provide a better error message when trying to open directories.
814 // This only runs if we failed to open the file, so there is probably
815 // no performances issues.
816 if (LastError != ERROR_ACCESS_DENIED)
818 if (is_directory(Name))
819 return make_error_code(std::errc::is_a_directory);
823 int FD = ::_open_osfhandle(intptr_t(H), 0);
826 return windows_error(ERROR_INVALID_HANDLE);
833 error_code openFileForWrite(const Twine &Name, int &ResultFD,
834 sys::fs::OpenFlags Flags, unsigned Mode) {
835 // Verify that we don't have both "append" and "excl".
836 assert((!(Flags & sys::fs::F_Excl) || !(Flags & sys::fs::F_Append)) &&
837 "Cannot specify both 'excl' and 'append' file creation flags!");
839 SmallString<128> PathStorage;
840 SmallVector<wchar_t, 128> PathUTF16;
842 if (error_code EC = UTF8ToUTF16(Name.toStringRef(PathStorage),
846 DWORD CreationDisposition;
848 CreationDisposition = CREATE_NEW;
849 else if (Flags & F_Append)
850 CreationDisposition = OPEN_ALWAYS;
852 CreationDisposition = CREATE_ALWAYS;
854 DWORD Access = GENERIC_WRITE;
856 Access |= GENERIC_READ;
858 HANDLE H = ::CreateFileW(PathUTF16.begin(), Access,
859 FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
860 CreationDisposition, FILE_ATTRIBUTE_NORMAL, NULL);
862 if (H == INVALID_HANDLE_VALUE) {
863 DWORD LastError = ::GetLastError();
864 error_code EC = windows_error(LastError);
865 // Provide a better error message when trying to open directories.
866 // This only runs if we failed to open the file, so there is probably
867 // no performances issues.
868 if (LastError != ERROR_ACCESS_DENIED)
870 if (is_directory(Name))
871 return make_error_code(std::errc::is_a_directory);
876 if (Flags & F_Append)
877 OpenFlags |= _O_APPEND;
880 OpenFlags |= _O_TEXT;
882 int FD = ::_open_osfhandle(intptr_t(H), OpenFlags);
885 return windows_error(ERROR_INVALID_HANDLE);
891 } // end namespace fs
895 bool home_directory(SmallVectorImpl<char> &result) {
896 wchar_t Path[MAX_PATH];
897 if (::SHGetFolderPathW(0, CSIDL_APPDATA | CSIDL_FLAG_CREATE, 0,
898 /*SHGFP_TYPE_CURRENT*/0, Path) != S_OK)
901 if (UTF16ToUTF8(Path, ::wcslen(Path), result))
907 } // end namespace path
910 llvm::error_code UTF8ToUTF16(llvm::StringRef utf8,
911 llvm::SmallVectorImpl<wchar_t> &utf16) {
913 int len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8.begin(),
914 utf8.size(), utf16.begin(), 0);
917 return windows_error(::GetLastError());
919 utf16.reserve(len + 1);
922 len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8.begin(),
923 utf8.size(), utf16.begin(), utf16.size());
926 return windows_error(::GetLastError());
929 // Make utf16 null terminated.
933 return llvm::error_code();
936 llvm::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
937 llvm::SmallVectorImpl<char> &utf8) {
940 int len = ::WideCharToMultiByte(CP_UTF8, 0, utf16, utf16_len, utf8.begin(),
944 return windows_error(::GetLastError());
949 // Now do the actual conversion.
950 len = ::WideCharToMultiByte(CP_UTF8, 0, utf16, utf16_len, utf8.data(),
951 utf8.size(), NULL, NULL);
954 return windows_error(::GetLastError());
957 // Make utf8 null terminated.
961 return llvm::error_code();
963 } // end namespace windows
964 } // end namespace sys
965 } // end namespace llvm