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, std::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, std::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 mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) {
471 // Make sure that the requested size fits within SIZE_T.
472 if (Size > std::numeric_limits<SIZE_T>::max()) {
473 if (FileDescriptor) {
475 _close(FileDescriptor);
477 ::CloseHandle(FileHandle);
478 return std::make_error_code(std::errc::invalid_argument);
483 case readonly: flprotect = PAGE_READONLY; break;
484 case readwrite: flprotect = PAGE_READWRITE; break;
485 case priv: flprotect = PAGE_WRITECOPY; break;
489 ::CreateFileMappingW(FileHandle, 0, flprotect,
490 (Offset + Size) >> 32,
491 (Offset + Size) & 0xffffffff,
493 if (FileMappingHandle == NULL) {
494 error_code ec = windows_error(GetLastError());
495 if (FileDescriptor) {
497 _close(FileDescriptor);
499 ::CloseHandle(FileHandle);
503 DWORD dwDesiredAccess;
505 case readonly: dwDesiredAccess = FILE_MAP_READ; break;
506 case readwrite: dwDesiredAccess = FILE_MAP_WRITE; break;
507 case priv: dwDesiredAccess = FILE_MAP_COPY; break;
509 Mapping = ::MapViewOfFile(FileMappingHandle,
514 if (Mapping == NULL) {
515 error_code ec = windows_error(GetLastError());
516 ::CloseHandle(FileMappingHandle);
517 if (FileDescriptor) {
519 _close(FileDescriptor);
521 ::CloseHandle(FileHandle);
526 MEMORY_BASIC_INFORMATION mbi;
527 SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi));
529 error_code ec = windows_error(GetLastError());
530 ::UnmapViewOfFile(Mapping);
531 ::CloseHandle(FileMappingHandle);
532 if (FileDescriptor) {
534 _close(FileDescriptor);
536 ::CloseHandle(FileHandle);
539 Size = mbi.RegionSize;
542 // Close all the handles except for the view. It will keep the other handles
544 ::CloseHandle(FileMappingHandle);
545 if (FileDescriptor) {
547 _close(FileDescriptor); // Also closes FileHandle.
549 ::CloseHandle(FileHandle);
553 mapped_file_region::mapped_file_region(const Twine &path,
562 , FileHandle(INVALID_HANDLE_VALUE)
563 , FileMappingHandle() {
564 SmallString<128> path_storage;
565 SmallVector<wchar_t, 128> path_utf16;
567 // Convert path to UTF-16.
568 if ((ec = UTF8ToUTF16(path.toStringRef(path_storage), path_utf16)))
571 // Get file handle for creating a file mapping.
572 FileHandle = ::CreateFileW(c_str(path_utf16),
573 Mode == readonly ? GENERIC_READ
574 : GENERIC_READ | GENERIC_WRITE,
575 Mode == readonly ? FILE_SHARE_READ
578 Mode == readonly ? OPEN_EXISTING
580 Mode == readonly ? FILE_ATTRIBUTE_READONLY
581 : FILE_ATTRIBUTE_NORMAL,
583 if (FileHandle == INVALID_HANDLE_VALUE) {
584 ec = windows_error(::GetLastError());
589 ec = init(FileDescriptor, true, offset);
591 Mapping = FileMappingHandle = 0;
592 FileHandle = INVALID_HANDLE_VALUE;
597 mapped_file_region::mapped_file_region(int fd,
607 , FileHandle(INVALID_HANDLE_VALUE)
608 , FileMappingHandle() {
609 FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(fd));
610 if (FileHandle == INVALID_HANDLE_VALUE) {
612 _close(FileDescriptor);
614 ec = std::make_error_code(std::errc::bad_file_descriptor);
618 ec = init(FileDescriptor, closefd, offset);
620 Mapping = FileMappingHandle = 0;
621 FileHandle = INVALID_HANDLE_VALUE;
626 mapped_file_region::~mapped_file_region() {
628 ::UnmapViewOfFile(Mapping);
631 mapped_file_region::mapped_file_region(mapped_file_region &&other)
634 , Mapping(other.Mapping)
635 , FileDescriptor(other.FileDescriptor)
636 , FileHandle(other.FileHandle)
637 , FileMappingHandle(other.FileMappingHandle) {
638 other.Mapping = other.FileMappingHandle = 0;
639 other.FileHandle = INVALID_HANDLE_VALUE;
640 other.FileDescriptor = 0;
643 mapped_file_region::mapmode mapped_file_region::flags() const {
644 assert(Mapping && "Mapping failed but used anyway!");
648 uint64_t mapped_file_region::size() const {
649 assert(Mapping && "Mapping failed but used anyway!");
653 char *mapped_file_region::data() const {
654 assert(Mode != readonly && "Cannot get non-const data for readonly mapping!");
655 assert(Mapping && "Mapping failed but used anyway!");
656 return reinterpret_cast<char*>(Mapping);
659 const char *mapped_file_region::const_data() const {
660 assert(Mapping && "Mapping failed but used anyway!");
661 return reinterpret_cast<const char*>(Mapping);
664 int mapped_file_region::alignment() {
666 ::GetSystemInfo(&SysInfo);
667 return SysInfo.dwAllocationGranularity;
670 error_code detail::directory_iterator_construct(detail::DirIterState &it,
672 SmallVector<wchar_t, 128> path_utf16;
674 if (error_code ec = UTF8ToUTF16(path,
678 // Convert path to the format that Windows is happy with.
679 if (path_utf16.size() > 0 &&
680 !is_separator(path_utf16[path.size() - 1]) &&
681 path_utf16[path.size() - 1] != L':') {
682 path_utf16.push_back(L'\\');
683 path_utf16.push_back(L'*');
685 path_utf16.push_back(L'*');
688 // Get the first directory entry.
689 WIN32_FIND_DATAW FirstFind;
690 ScopedFindHandle FindHandle(::FindFirstFileW(c_str(path_utf16), &FirstFind));
692 return windows_error(::GetLastError());
694 size_t FilenameLen = ::wcslen(FirstFind.cFileName);
695 while ((FilenameLen == 1 && FirstFind.cFileName[0] == L'.') ||
696 (FilenameLen == 2 && FirstFind.cFileName[0] == L'.' &&
697 FirstFind.cFileName[1] == L'.'))
698 if (!::FindNextFileW(FindHandle, &FirstFind)) {
699 DWORD LastError = ::GetLastError();
701 if (LastError == ERROR_NO_MORE_FILES)
702 return detail::directory_iterator_destruct(it);
703 return windows_error(LastError);
705 FilenameLen = ::wcslen(FirstFind.cFileName);
707 // Construct the current directory entry.
708 SmallString<128> directory_entry_name_utf8;
709 if (error_code ec = UTF16ToUTF8(FirstFind.cFileName,
710 ::wcslen(FirstFind.cFileName),
711 directory_entry_name_utf8))
714 it.IterationHandle = intptr_t(FindHandle.take());
715 SmallString<128> directory_entry_path(path);
716 path::append(directory_entry_path, directory_entry_name_utf8.str());
717 it.CurrentEntry = directory_entry(directory_entry_path.str());
722 error_code detail::directory_iterator_destruct(detail::DirIterState &it) {
723 if (it.IterationHandle != 0)
724 // Closes the handle if it's valid.
725 ScopedFindHandle close(HANDLE(it.IterationHandle));
726 it.IterationHandle = 0;
727 it.CurrentEntry = directory_entry();
731 error_code detail::directory_iterator_increment(detail::DirIterState &it) {
732 WIN32_FIND_DATAW FindData;
733 if (!::FindNextFileW(HANDLE(it.IterationHandle), &FindData)) {
734 DWORD LastError = ::GetLastError();
736 if (LastError == ERROR_NO_MORE_FILES)
737 return detail::directory_iterator_destruct(it);
738 return windows_error(LastError);
741 size_t FilenameLen = ::wcslen(FindData.cFileName);
742 if ((FilenameLen == 1 && FindData.cFileName[0] == L'.') ||
743 (FilenameLen == 2 && FindData.cFileName[0] == L'.' &&
744 FindData.cFileName[1] == L'.'))
745 return directory_iterator_increment(it);
747 SmallString<128> directory_entry_path_utf8;
748 if (error_code ec = UTF16ToUTF8(FindData.cFileName,
749 ::wcslen(FindData.cFileName),
750 directory_entry_path_utf8))
753 it.CurrentEntry.replace_filename(Twine(directory_entry_path_utf8));
757 error_code openFileForRead(const Twine &Name, int &ResultFD) {
758 SmallString<128> PathStorage;
759 SmallVector<wchar_t, 128> PathUTF16;
761 if (error_code EC = UTF8ToUTF16(Name.toStringRef(PathStorage),
765 HANDLE H = ::CreateFileW(PathUTF16.begin(), GENERIC_READ,
766 FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
767 OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
768 if (H == INVALID_HANDLE_VALUE) {
769 DWORD LastError = ::GetLastError();
770 error_code EC = windows_error(LastError);
771 // Provide a better error message when trying to open directories.
772 // This only runs if we failed to open the file, so there is probably
773 // no performances issues.
774 if (LastError != ERROR_ACCESS_DENIED)
776 if (is_directory(Name))
777 return std::make_error_code(std::errc::is_a_directory);
781 int FD = ::_open_osfhandle(intptr_t(H), 0);
784 return windows_error(ERROR_INVALID_HANDLE);
791 error_code openFileForWrite(const Twine &Name, int &ResultFD,
792 sys::fs::OpenFlags Flags, unsigned Mode) {
793 // Verify that we don't have both "append" and "excl".
794 assert((!(Flags & sys::fs::F_Excl) || !(Flags & sys::fs::F_Append)) &&
795 "Cannot specify both 'excl' and 'append' file creation flags!");
797 SmallString<128> PathStorage;
798 SmallVector<wchar_t, 128> PathUTF16;
800 if (error_code EC = UTF8ToUTF16(Name.toStringRef(PathStorage),
804 DWORD CreationDisposition;
806 CreationDisposition = CREATE_NEW;
807 else if (Flags & F_Append)
808 CreationDisposition = OPEN_ALWAYS;
810 CreationDisposition = CREATE_ALWAYS;
812 DWORD Access = GENERIC_WRITE;
814 Access |= GENERIC_READ;
816 HANDLE H = ::CreateFileW(PathUTF16.begin(), Access,
817 FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
818 CreationDisposition, FILE_ATTRIBUTE_NORMAL, NULL);
820 if (H == INVALID_HANDLE_VALUE) {
821 DWORD LastError = ::GetLastError();
822 error_code EC = windows_error(LastError);
823 // Provide a better error message when trying to open directories.
824 // This only runs if we failed to open the file, so there is probably
825 // no performances issues.
826 if (LastError != ERROR_ACCESS_DENIED)
828 if (is_directory(Name))
829 return std::make_error_code(std::errc::is_a_directory);
834 if (Flags & F_Append)
835 OpenFlags |= _O_APPEND;
838 OpenFlags |= _O_TEXT;
840 int FD = ::_open_osfhandle(intptr_t(H), OpenFlags);
843 return windows_error(ERROR_INVALID_HANDLE);
849 } // end namespace fs
853 bool home_directory(SmallVectorImpl<char> &result) {
854 wchar_t Path[MAX_PATH];
855 if (::SHGetFolderPathW(0, CSIDL_APPDATA | CSIDL_FLAG_CREATE, 0,
856 /*SHGFP_TYPE_CURRENT*/0, Path) != S_OK)
859 if (UTF16ToUTF8(Path, ::wcslen(Path), result))
865 } // end namespace path
868 std::error_code UTF8ToUTF16(llvm::StringRef utf8,
869 llvm::SmallVectorImpl<wchar_t> &utf16) {
871 int len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8.begin(),
872 utf8.size(), utf16.begin(), 0);
875 return windows_error(::GetLastError());
877 utf16.reserve(len + 1);
880 len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8.begin(),
881 utf8.size(), utf16.begin(), utf16.size());
884 return windows_error(::GetLastError());
887 // Make utf16 null terminated.
891 return std::error_code();
894 std::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
895 llvm::SmallVectorImpl<char> &utf8) {
898 int len = ::WideCharToMultiByte(CP_UTF8, 0, utf16, utf16_len, utf8.begin(),
902 return windows_error(::GetLastError());
907 // Now do the actual conversion.
908 len = ::WideCharToMultiByte(CP_UTF8, 0, utf16, utf16_len, utf8.data(),
909 utf8.size(), NULL, NULL);
912 return windows_error(::GetLastError());
915 // Make utf8 null terminated.
919 return std::error_code();
921 } // end namespace windows
922 } // end namespace sys
923 } // end namespace llvm