Path.inc revision 353358
1261991Sdim//===- llvm/Support/Windows/Path.inc - Windows Path Impl --------*- C++ -*-===// 2218885Sdim// 3353358Sdim// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4353358Sdim// See https://llvm.org/LICENSE.txt for license information. 5353358Sdim// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6218885Sdim// 7218885Sdim//===----------------------------------------------------------------------===// 8218885Sdim// 9261991Sdim// This file implements the Windows specific implementation of the Path API. 10218885Sdim// 11218885Sdim//===----------------------------------------------------------------------===// 12218885Sdim 13218885Sdim//===----------------------------------------------------------------------===// 14261991Sdim//=== WARNING: Implementation here must contain only generic Windows code that 15261991Sdim//=== is guaranteed to work on *all* Windows variants. 16218885Sdim//===----------------------------------------------------------------------===// 17218885Sdim 18261991Sdim#include "llvm/ADT/STLExtras.h" 19341825Sdim#include "llvm/Support/ConvertUTF.h" 20276479Sdim#include "llvm/Support/WindowsError.h" 21261991Sdim#include <fcntl.h> 22261991Sdim#include <io.h> 23261991Sdim#include <sys/stat.h> 24261991Sdim#include <sys/types.h> 25218885Sdim 26276479Sdim// These two headers must be included last, and make sure shlobj is required 27276479Sdim// after Windows.h to make sure it picks up our definition of _WIN32_WINNT 28276479Sdim#include "WindowsSupport.h" 29321369Sdim#include <shellapi.h> 30276479Sdim#include <shlobj.h> 31276479Sdim 32261991Sdim#undef max 33218885Sdim 34261991Sdim// MinGW doesn't define this. 35261991Sdim#ifndef _ERRNO_T_DEFINED 36261991Sdim#define _ERRNO_T_DEFINED 37261991Sdimtypedef int errno_t; 38261991Sdim#endif 39218885Sdim 40261991Sdim#ifdef _MSC_VER 41261991Sdim# pragma comment(lib, "advapi32.lib") // This provides CryptAcquireContextW. 42296417Sdim# pragma comment(lib, "ole32.lib") // This provides CoTaskMemFree 43261991Sdim#endif 44218885Sdim 45261991Sdimusing namespace llvm; 46218885Sdim 47261991Sdimusing llvm::sys::windows::UTF8ToUTF16; 48341825Sdimusing llvm::sys::windows::CurCPToUTF16; 49261991Sdimusing llvm::sys::windows::UTF16ToUTF8; 50280031Sdimusing llvm::sys::path::widenPath; 51218885Sdim 52276479Sdimstatic bool is_separator(const wchar_t value) { 53276479Sdim switch (value) { 54276479Sdim case L'\\': 55276479Sdim case L'/': 56276479Sdim return true; 57276479Sdim default: 58276479Sdim return false; 59218885Sdim } 60218885Sdim} 61218885Sdim 62261991Sdimnamespace llvm { 63261991Sdimnamespace sys { 64280031Sdimnamespace path { 65280031Sdim 66280031Sdim// Convert a UTF-8 path to UTF-16. Also, if the absolute equivalent of the 67280031Sdim// path is longer than CreateDirectory can tolerate, make it absolute and 68280031Sdim// prefixed by '\\?\'. 69280031Sdimstd::error_code widenPath(const Twine &Path8, 70280031Sdim SmallVectorImpl<wchar_t> &Path16) { 71280031Sdim const size_t MaxDirLen = MAX_PATH - 12; // Must leave room for 8.3 filename. 72280031Sdim 73280031Sdim // Several operations would convert Path8 to SmallString; more efficient to 74280031Sdim // do it once up front. 75280031Sdim SmallString<128> Path8Str; 76280031Sdim Path8.toVector(Path8Str); 77280031Sdim 78280031Sdim // If we made this path absolute, how much longer would it get? 79280031Sdim size_t CurPathLen; 80280031Sdim if (llvm::sys::path::is_absolute(Twine(Path8Str))) 81280031Sdim CurPathLen = 0; // No contribution from current_path needed. 82280031Sdim else { 83280031Sdim CurPathLen = ::GetCurrentDirectoryW(0, NULL); 84280031Sdim if (CurPathLen == 0) 85288943Sdim return mapWindowsError(::GetLastError()); 86280031Sdim } 87280031Sdim 88280031Sdim // Would the absolute path be longer than our limit? 89280031Sdim if ((Path8Str.size() + CurPathLen) >= MaxDirLen && 90280031Sdim !Path8Str.startswith("\\\\?\\")) { 91280031Sdim SmallString<2*MAX_PATH> FullPath("\\\\?\\"); 92280031Sdim if (CurPathLen) { 93280031Sdim SmallString<80> CurPath; 94280031Sdim if (std::error_code EC = llvm::sys::fs::current_path(CurPath)) 95280031Sdim return EC; 96280031Sdim FullPath.append(CurPath); 97280031Sdim } 98327952Sdim // Traverse the requested path, canonicalizing . and .. (because the \\?\ 99327952Sdim // prefix is documented to treat them as real components). Ignore 100327952Sdim // separators, which can be returned from the iterator if the path has a 101327952Sdim // drive name. We don't need to call native() on the result since append() 102327952Sdim // always attaches preferred_separator. 103280031Sdim for (llvm::sys::path::const_iterator I = llvm::sys::path::begin(Path8Str), 104280031Sdim E = llvm::sys::path::end(Path8Str); 105280031Sdim I != E; ++I) { 106327952Sdim if (I->size() == 1 && is_separator((*I)[0])) 107327952Sdim continue; 108280031Sdim if (I->size() == 1 && *I == ".") 109280031Sdim continue; 110280031Sdim if (I->size() == 2 && *I == "..") 111280031Sdim llvm::sys::path::remove_filename(FullPath); 112280031Sdim else 113280031Sdim llvm::sys::path::append(FullPath, *I); 114280031Sdim } 115280031Sdim return UTF8ToUTF16(FullPath, Path16); 116280031Sdim } 117280031Sdim 118280031Sdim // Just use the caller's original path. 119280031Sdim return UTF8ToUTF16(Path8Str, Path16); 120280031Sdim} 121280031Sdim} // end namespace path 122280031Sdim 123261991Sdimnamespace fs { 124218885Sdim 125341825Sdimconst file_t kInvalidFile = INVALID_HANDLE_VALUE; 126341825Sdim 127261991Sdimstd::string getMainExecutable(const char *argv0, void *MainExecAddr) { 128261991Sdim SmallVector<wchar_t, MAX_PATH> PathName; 129261991Sdim DWORD Size = ::GetModuleFileNameW(NULL, PathName.data(), PathName.capacity()); 130218885Sdim 131261991Sdim // A zero return value indicates a failure other than insufficient space. 132261991Sdim if (Size == 0) 133261991Sdim return ""; 134218885Sdim 135261991Sdim // Insufficient space is determined by a return value equal to the size of 136261991Sdim // the buffer passed in. 137261991Sdim if (Size == PathName.capacity()) 138261991Sdim return ""; 139218885Sdim 140261991Sdim // On success, GetModuleFileNameW returns the number of characters written to 141261991Sdim // the buffer not including the NULL terminator. 142261991Sdim PathName.set_size(Size); 143218885Sdim 144261991Sdim // Convert the result from UTF-16 to UTF-8. 145261991Sdim SmallVector<char, MAX_PATH> PathNameUTF8; 146261991Sdim if (UTF16ToUTF8(PathName.data(), PathName.size(), PathNameUTF8)) 147261991Sdim return ""; 148218885Sdim 149261991Sdim return std::string(PathNameUTF8.data()); 150218885Sdim} 151218885Sdim 152261991SdimUniqueID file_status::getUniqueID() const { 153261991Sdim // The file is uniquely identified by the volume serial number along 154261991Sdim // with the 64-bit file identifier. 155261991Sdim uint64_t FileID = (static_cast<uint64_t>(FileIndexHigh) << 32ULL) | 156261991Sdim static_cast<uint64_t>(FileIndexLow); 157261991Sdim 158261991Sdim return UniqueID(VolumeSerialNumber, FileID); 159218885Sdim} 160218885Sdim 161309124SdimErrorOrdisk_space(const Twine &Path) { 162309124Sdim ULARGE_INTEGER Avail, Total, Free; 163309124Sdim if (!::GetDiskFreeSpaceExA(Path.str().c_str(), &Avail, &Total, &Free)) 164309124Sdim return mapWindowsError(::GetLastError()); 165309124Sdim space_info SpaceInfo; 166309124Sdim SpaceInfo.capacity = 167309124Sdim (static_cast<uint64_t>(Total.HighPart) << 32) + Total.LowPart; 168309124Sdim SpaceInfo.free = (static_cast<uint64_t>(Free.HighPart) << 32) + Free.LowPart; 169309124Sdim SpaceInfo.available = 170309124Sdim (static_cast<uint64_t>(Avail.HighPart) << 32) + Avail.LowPart; 171309124Sdim return SpaceInfo; 172309124Sdim} 173309124Sdim 174327952SdimTimePoint<> basic_file_status::getLastAccessedTime() const { 175314564Sdim FILETIME Time; 176314564Sdim Time.dwLowDateTime = LastAccessedTimeLow; 177314564Sdim Time.dwHighDateTime = LastAccessedTimeHigh; 178314564Sdim return toTimePoint(Time); 179309124Sdim} 180309124Sdim 181327952SdimTimePoint<> basic_file_status::getLastModificationTime() const { 182314564Sdim FILETIME Time; 183314564Sdim Time.dwLowDateTime = LastWriteTimeLow; 184314564Sdim Time.dwHighDateTime = LastWriteTimeHigh; 185314564Sdim return toTimePoint(Time); 186218885Sdim} 187218885Sdim 188321369Sdimuint32_t file_status::getLinkCount() const { 189321369Sdim return NumLinks; 190321369Sdim} 191321369Sdim 192276479Sdimstd::error_code current_path(SmallVectorImpl<char> &result) { 193261991Sdim SmallVector<wchar_t, MAX_PATH> cur_path; 194261991Sdim DWORD len = MAX_PATH; 195218885Sdim 196261991Sdim do { 197261991Sdim cur_path.reserve(len); 198261991Sdim len = ::GetCurrentDirectoryW(cur_path.capacity(), cur_path.data()); 199218885Sdim 200261991Sdim // A zero return value indicates a failure other than insufficient space. 201261991Sdim if (len == 0) 202288943Sdim return mapWindowsError(::GetLastError()); 203218885Sdim 204261991Sdim // If there's insufficient space, the len returned is larger than the len 205261991Sdim // given. 206261991Sdim } while (len > cur_path.capacity()); 207261991Sdim 208261991Sdim // On success, GetCurrentDirectoryW returns the number of characters not 209261991Sdim // including the null-terminator. 210261991Sdim cur_path.set_size(len); 211261991Sdim return UTF16ToUTF8(cur_path.begin(), cur_path.size(), result); 212218885Sdim} 213218885Sdim 214321369Sdimstd::error_code set_current_path(const Twine &path) { 215321369Sdim // Convert to utf-16. 216321369Sdim SmallVector<wchar_t, 128> wide_path; 217321369Sdim if (std::error_code ec = widenPath(path, wide_path)) 218321369Sdim return ec; 219321369Sdim 220321369Sdim if (!::SetCurrentDirectoryW(wide_path.begin())) 221321369Sdim return mapWindowsError(::GetLastError()); 222321369Sdim 223321369Sdim return std::error_code(); 224321369Sdim} 225321369Sdim 226296417Sdimstd::error_code create_directory(const Twine &path, bool IgnoreExisting, 227296417Sdim perms Perms) { 228261991Sdim SmallVector<wchar_t, 128> path_utf16; 229218885Sdim 230280031Sdim if (std::error_code ec = widenPath(path, path_utf16)) 231261991Sdim return ec; 232218885Sdim 233261991Sdim if (!::CreateDirectoryW(path_utf16.begin(), NULL)) { 234276479Sdim DWORD LastError = ::GetLastError(); 235276479Sdim if (LastError != ERROR_ALREADY_EXISTS || !IgnoreExisting) 236288943Sdim return mapWindowsError(LastError); 237276479Sdim } 238218885Sdim 239276479Sdim return std::error_code(); 240218885Sdim} 241218885Sdim 242276479Sdim// We can't use symbolic links for windows. 243276479Sdimstd::error_code create_link(const Twine &to, const Twine &from) { 244261991Sdim // Convert to utf-16. 245261991Sdim SmallVector<wchar_t, 128> wide_from; 246261991Sdim SmallVector<wchar_t, 128> wide_to; 247280031Sdim if (std::error_code ec = widenPath(from, wide_from)) 248276479Sdim return ec; 249280031Sdim if (std::error_code ec = widenPath(to, wide_to)) 250276479Sdim return ec; 251218885Sdim 252276479Sdim if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL)) 253288943Sdim return mapWindowsError(::GetLastError()); 254218885Sdim 255276479Sdim return std::error_code(); 256218885Sdim} 257218885Sdim 258314564Sdimstd::error_code create_hard_link(const Twine &to, const Twine &from) { 259327952Sdim return create_link(to, from); 260314564Sdim} 261314564Sdim 262276479Sdimstd::error_code remove(const Twine &path, bool IgnoreNonExisting) { 263261991Sdim SmallVector<wchar_t, 128> path_utf16; 264218885Sdim 265280031Sdim if (std::error_code ec = widenPath(path, path_utf16)) 266261991Sdim return ec; 267261991Sdim 268327952Sdim // We don't know whether this is a file or a directory, and remove() can 269327952Sdim // accept both. The usual way to delete a file or directory is to use one of 270327952Sdim // the DeleteFile or RemoveDirectory functions, but that requires you to know 271327952Sdim // which one it is. We could stat() the file to determine that, but that would 272327952Sdim // cost us additional system calls, which can be slow in a directory 273327952Sdim // containing a large number of files. So instead we call CreateFile directly. 274327952Sdim // The important part is the FILE_FLAG_DELETE_ON_CLOSE flag, which causes the 275327952Sdim // file to be deleted once it is closed. We also use the flags 276327952Sdim // FILE_FLAG_BACKUP_SEMANTICS (which allows us to open directories), and 277327952Sdim // FILE_FLAG_OPEN_REPARSE_POINT (don't follow symlinks). 278327952Sdim ScopedFileHandle h(::CreateFileW( 279327952Sdim c_str(path_utf16), DELETE, 280327952Sdim FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, 281327952Sdim OPEN_EXISTING, 282327952Sdim FILE_ATTRIBUTE_NORMAL | FILE_FLAG_BACKUP_SEMANTICS | 283327952Sdim FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_DELETE_ON_CLOSE, 284327952Sdim NULL)); 285327952Sdim if (!h) { 286288943Sdim std::error_code EC = mapWindowsError(::GetLastError()); 287276479Sdim if (EC != errc::no_such_file_or_directory || !IgnoreNonExisting) 288276479Sdim return EC; 289276479Sdim } 290327952Sdim 291276479Sdim return std::error_code(); 292218885Sdim} 293218885Sdim 294321369Sdimstatic std::error_code is_local_internal(SmallVectorImpl<wchar_t> &Path, 295321369Sdim bool &Result) { 296321369Sdim SmallVector<wchar_t, 128> VolumePath; 297321369Sdim size_t Len = 128; 298321369Sdim while (true) { 299321369Sdim VolumePath.resize(Len); 300321369Sdim BOOL Success = 301321369Sdim ::GetVolumePathNameW(Path.data(), VolumePath.data(), VolumePath.size()); 302321369Sdim 303321369Sdim if (Success) 304321369Sdim break; 305321369Sdim 306321369Sdim DWORD Err = ::GetLastError(); 307321369Sdim if (Err != ERROR_INSUFFICIENT_BUFFER) 308321369Sdim return mapWindowsError(Err); 309321369Sdim 310321369Sdim Len *= 2; 311321369Sdim } 312321369Sdim // If the output buffer has exactly enough space for the path name, but not 313321369Sdim // the null terminator, it will leave the output unterminated. Push a null 314321369Sdim // terminator onto the end to ensure that this never happens. 315321369Sdim VolumePath.push_back(L'\0'); 316321369Sdim VolumePath.set_size(wcslen(VolumePath.data())); 317321369Sdim const wchar_t *P = VolumePath.data(); 318321369Sdim 319321369Sdim UINT Type = ::GetDriveTypeW(P); 320321369Sdim switch (Type) { 321321369Sdim case DRIVE_FIXED: 322321369Sdim Result = true; 323321369Sdim return std::error_code(); 324321369Sdim case DRIVE_REMOTE: 325321369Sdim case DRIVE_CDROM: 326321369Sdim case DRIVE_RAMDISK: 327321369Sdim case DRIVE_REMOVABLE: 328321369Sdim Result = false; 329321369Sdim return std::error_code(); 330321369Sdim default: 331321369Sdim return make_error_code(errc::no_such_file_or_directory); 332321369Sdim } 333321369Sdim llvm_unreachable("Unreachable!"); 334321369Sdim} 335321369Sdim 336321369Sdimstd::error_code is_local(const Twine &path, bool &result) { 337321369Sdim if (!llvm::sys::fs::exists(path) || !llvm::sys::path::has_root_path(path)) 338321369Sdim return make_error_code(errc::no_such_file_or_directory); 339321369Sdim 340321369Sdim SmallString<128> Storage; 341321369Sdim StringRef P = path.toStringRef(Storage); 342321369Sdim 343321369Sdim // Convert to utf-16. 344321369Sdim SmallVector<wchar_t, 128> WidePath; 345321369Sdim if (std::error_code ec = widenPath(P, WidePath)) 346321369Sdim return ec; 347321369Sdim return is_local_internal(WidePath, result); 348321369Sdim} 349321369Sdim 350327952Sdimstatic std::error_code realPathFromHandle(HANDLE H, 351327952Sdim SmallVectorImpl<wchar_t> &Buffer) { 352327952Sdim DWORD CountChars = ::GetFinalPathNameByHandleW( 353327952Sdim H, Buffer.begin(), Buffer.capacity() - 1, FILE_NAME_NORMALIZED); 354327952Sdim if (CountChars > Buffer.capacity()) { 355327952Sdim // The buffer wasn't big enough, try again. In this case the return value 356327952Sdim // *does* indicate the size of the null terminator. 357327952Sdim Buffer.reserve(CountChars); 358327952Sdim CountChars = ::GetFinalPathNameByHandleW( 359327952Sdim H, Buffer.data(), Buffer.capacity() - 1, FILE_NAME_NORMALIZED); 360327952Sdim } 361327952Sdim if (CountChars == 0) 362327952Sdim return mapWindowsError(GetLastError()); 363327952Sdim Buffer.set_size(CountChars); 364327952Sdim return std::error_code(); 365327952Sdim} 366327952Sdim 367327952Sdimstatic std::error_code realPathFromHandle(HANDLE H, 368327952Sdim SmallVectorImpl<char> &RealPath) { 369327952Sdim RealPath.clear(); 370327952Sdim SmallVector<wchar_t, MAX_PATH> Buffer; 371327952Sdim if (std::error_code EC = realPathFromHandle(H, Buffer)) 372327952Sdim return EC; 373327952Sdim 374327952Sdim const wchar_t *Data = Buffer.data(); 375327952Sdim DWORD CountChars = Buffer.size(); 376327952Sdim if (CountChars >= 4) { 377327952Sdim if (0 == ::memcmp(Data, L"\\\\?\\", 8)) { 378327952Sdim CountChars -= 4; 379327952Sdim Data += 4; 380327952Sdim } 381327952Sdim } 382327952Sdim 383327952Sdim // Convert the result from UTF-16 to UTF-8. 384327952Sdim return UTF16ToUTF8(Data, CountChars, RealPath); 385327952Sdim} 386327952Sdim 387321369Sdimstd::error_code is_local(int FD, bool &Result) { 388321369Sdim SmallVector<wchar_t, 128> FinalPath; 389321369Sdim HANDLE Handle = reinterpret_cast<HANDLE>(_get_osfhandle(FD)); 390321369Sdim 391327952Sdim if (std::error_code EC = realPathFromHandle(Handle, FinalPath)) 392327952Sdim return EC; 393321369Sdim 394321369Sdim return is_local_internal(FinalPath, Result); 395321369Sdim} 396321369Sdim 397327952Sdimstatic std::error_code setDeleteDisposition(HANDLE Handle, bool Delete) { 398327952Sdim FILE_DISPOSITION_INFO Disposition; 399327952Sdim Disposition.DeleteFile = Delete; 400327952Sdim if (!SetFileInformationByHandle(Handle, FileDispositionInfo, &Disposition, 401327952Sdim sizeof(Disposition))) 402327952Sdim return mapWindowsError(::GetLastError()); 403327952Sdim return std::error_code(); 404327952Sdim} 405261991Sdim 406327952Sdimstatic std::error_code rename_internal(HANDLE FromHandle, const Twine &To, 407327952Sdim bool ReplaceIfExists) { 408327952Sdim SmallVector<wchar_t, 0> ToWide; 409327952Sdim if (auto EC = widenPath(To, ToWide)) 410327952Sdim return EC; 411327952Sdim 412327952Sdim std::vector<char> RenameInfoBuf(sizeof(FILE_RENAME_INFO) - sizeof(wchar_t) + 413327952Sdim (ToWide.size() * sizeof(wchar_t))); 414327952Sdim FILE_RENAME_INFO &RenameInfo = 415327952Sdim *reinterpret_cast<FILE_RENAME_INFO *>(RenameInfoBuf.data()); 416327952Sdim RenameInfo.ReplaceIfExists = ReplaceIfExists; 417327952Sdim RenameInfo.RootDirectory = 0; 418344779Sdim RenameInfo.FileNameLength = ToWide.size() * sizeof(wchar_t); 419327952Sdim std::copy(ToWide.begin(), ToWide.end(), &RenameInfo.FileName[0]); 420327952Sdim 421327952Sdim SetLastError(ERROR_SUCCESS); 422327952Sdim if (!SetFileInformationByHandle(FromHandle, FileRenameInfo, &RenameInfo, 423327952Sdim RenameInfoBuf.size())) { 424327952Sdim unsigned Error = GetLastError(); 425327952Sdim if (Error == ERROR_SUCCESS) 426327952Sdim Error = ERROR_CALL_NOT_IMPLEMENTED; // Wine doesn't always set error code. 427327952Sdim return mapWindowsError(Error); 428327952Sdim } 429327952Sdim 430327952Sdim return std::error_code(); 431327952Sdim} 432327952Sdim 433327952Sdimstatic std::error_code rename_handle(HANDLE FromHandle, const Twine &To) { 434327952Sdim SmallVector<wchar_t, 128> WideTo; 435327952Sdim if (std::error_code EC = widenPath(To, WideTo)) 436327952Sdim return EC; 437327952Sdim 438327952Sdim // We normally expect this loop to succeed after a few iterations. If it 439327952Sdim // requires more than 200 tries, it's more likely that the failures are due to 440327952Sdim // a true error, so stop trying. 441327952Sdim for (unsigned Retry = 0; Retry != 200; ++Retry) { 442327952Sdim auto EC = rename_internal(FromHandle, To, true); 443327952Sdim 444327952Sdim if (EC == 445327952Sdim std::error_code(ERROR_CALL_NOT_IMPLEMENTED, std::system_category())) { 446327952Sdim // Wine doesn't support SetFileInformationByHandle in rename_internal. 447327952Sdim // Fall back to MoveFileEx. 448327952Sdim SmallVector<wchar_t, MAX_PATH> WideFrom; 449327952Sdim if (std::error_code EC2 = realPathFromHandle(FromHandle, WideFrom)) 450327952Sdim return EC2; 451327952Sdim if (::MoveFileExW(WideFrom.begin(), WideTo.begin(), 452327952Sdim MOVEFILE_REPLACE_EXISTING)) 453309124Sdim return std::error_code(); 454327952Sdim return mapWindowsError(GetLastError()); 455327952Sdim } 456296417Sdim 457327952Sdim if (!EC || EC != errc::permission_denied) 458327952Sdim return EC; 459309124Sdim 460327952Sdim // The destination file probably exists and is currently open in another 461327952Sdim // process, either because the file was opened without FILE_SHARE_DELETE or 462327952Sdim // it is mapped into memory (e.g. using MemoryBuffer). Rename it in order to 463327952Sdim // move it out of the way of the source file. Use FILE_FLAG_DELETE_ON_CLOSE 464327952Sdim // to arrange for the destination file to be deleted when the other process 465327952Sdim // closes it. 466327952Sdim ScopedFileHandle ToHandle( 467327952Sdim ::CreateFileW(WideTo.begin(), GENERIC_READ | DELETE, 468327952Sdim FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 469327952Sdim NULL, OPEN_EXISTING, 470327952Sdim FILE_ATTRIBUTE_NORMAL | FILE_FLAG_DELETE_ON_CLOSE, NULL)); 471327952Sdim if (!ToHandle) { 472327952Sdim auto EC = mapWindowsError(GetLastError()); 473327952Sdim // Another process might have raced with us and moved the existing file 474327952Sdim // out of the way before we had a chance to open it. If that happens, try 475327952Sdim // to rename the source file again. 476327952Sdim if (EC == errc::no_such_file_or_directory) 477309124Sdim continue; 478327952Sdim return EC; 479327952Sdim } 480327952Sdim 481327952Sdim BY_HANDLE_FILE_INFORMATION FI; 482327952Sdim if (!GetFileInformationByHandle(ToHandle, &FI)) 483327952Sdim return mapWindowsError(GetLastError()); 484327952Sdim 485327952Sdim // Try to find a unique new name for the destination file. 486327952Sdim for (unsigned UniqueId = 0; UniqueId != 200; ++UniqueId) { 487327952Sdim std::string TmpFilename = (To + ".tmp" + utostr(UniqueId)).str(); 488327952Sdim if (auto EC = rename_internal(ToHandle, TmpFilename, false)) { 489327952Sdim if (EC == errc::file_exists || EC == errc::permission_denied) { 490327952Sdim // Again, another process might have raced with us and moved the file 491327952Sdim // before we could move it. Check whether this is the case, as it 492327952Sdim // might have caused the permission denied error. If that was the 493327952Sdim // case, we don't need to move it ourselves. 494327952Sdim ScopedFileHandle ToHandle2(::CreateFileW( 495327952Sdim WideTo.begin(), 0, 496327952Sdim FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, 497327952Sdim OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)); 498327952Sdim if (!ToHandle2) { 499327952Sdim auto EC = mapWindowsError(GetLastError()); 500327952Sdim if (EC == errc::no_such_file_or_directory) 501327952Sdim break; 502327952Sdim return EC; 503327952Sdim } 504327952Sdim BY_HANDLE_FILE_INFORMATION FI2; 505327952Sdim if (!GetFileInformationByHandle(ToHandle2, &FI2)) 506327952Sdim return mapWindowsError(GetLastError()); 507327952Sdim if (FI.nFileIndexHigh != FI2.nFileIndexHigh || 508327952Sdim FI.nFileIndexLow != FI2.nFileIndexLow || 509327952Sdim FI.dwVolumeSerialNumber != FI2.dwVolumeSerialNumber) 510327952Sdim break; 511327952Sdim continue; 512327952Sdim } 513327952Sdim return EC; 514309124Sdim } 515327952Sdim break; 516309124Sdim } 517309124Sdim 518327952Sdim // Okay, the old destination file has probably been moved out of the way at 519327952Sdim // this point, so try to rename the source file again. Still, another 520327952Sdim // process might have raced with us to create and open the destination 521327952Sdim // file, so we need to keep doing this until we succeed. 522327952Sdim } 523296417Sdim 524327952Sdim // The most likely root cause. 525327952Sdim return errc::permission_denied; 526327952Sdim} 527327952Sdim 528327952Sdimstatic std::error_code rename_fd(int FromFD, const Twine &To) { 529327952Sdim HANDLE FromHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FromFD)); 530327952Sdim return rename_handle(FromHandle, To); 531327952Sdim} 532327952Sdim 533327952Sdimstd::error_code rename(const Twine &From, const Twine &To) { 534327952Sdim // Convert to utf-16. 535327952Sdim SmallVector<wchar_t, 128> WideFrom; 536327952Sdim if (std::error_code EC = widenPath(From, WideFrom)) 537327952Sdim return EC; 538327952Sdim 539327952Sdim ScopedFileHandle FromHandle; 540327952Sdim // Retry this a few times to defeat badly behaved file system scanners. 541327952Sdim for (unsigned Retry = 0; Retry != 200; ++Retry) { 542327952Sdim if (Retry != 0) 543327952Sdim ::Sleep(10); 544327952Sdim FromHandle = 545327952Sdim ::CreateFileW(WideFrom.begin(), GENERIC_READ | DELETE, 546327952Sdim FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 547327952Sdim NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); 548327952Sdim if (FromHandle) 549327952Sdim break; 550261991Sdim } 551327952Sdim if (!FromHandle) 552327952Sdim return mapWindowsError(GetLastError()); 553261991Sdim 554327952Sdim return rename_handle(FromHandle, To); 555218885Sdim} 556218885Sdim 557280031Sdimstd::error_code resize_file(int FD, uint64_t Size) { 558261991Sdim#ifdef HAVE__CHSIZE_S 559280031Sdim errno_t error = ::_chsize_s(FD, Size); 560261991Sdim#else 561280031Sdim errno_t error = ::_chsize(FD, Size); 562261991Sdim#endif 563276479Sdim return std::error_code(error, std::generic_category()); 564218885Sdim} 565218885Sdim 566280031Sdimstd::error_code access(const Twine &Path, AccessMode Mode) { 567280031Sdim SmallVector<wchar_t, 128> PathUtf16; 568218885Sdim 569280031Sdim if (std::error_code EC = widenPath(Path, PathUtf16)) 570280031Sdim return EC; 571218885Sdim 572280031Sdim DWORD Attributes = ::GetFileAttributesW(PathUtf16.begin()); 573218885Sdim 574280031Sdim if (Attributes == INVALID_FILE_ATTRIBUTES) { 575261991Sdim // See if the file didn't actually exist. 576276479Sdim DWORD LastError = ::GetLastError(); 577276479Sdim if (LastError != ERROR_FILE_NOT_FOUND && 578276479Sdim LastError != ERROR_PATH_NOT_FOUND) 579288943Sdim return mapWindowsError(LastError); 580280031Sdim return errc::no_such_file_or_directory; 581280031Sdim } 582218885Sdim 583280031Sdim if (Mode == AccessMode::Write && (Attributes & FILE_ATTRIBUTE_READONLY)) 584280031Sdim return errc::permission_denied; 585218885Sdim 586280031Sdim return std::error_code(); 587261991Sdim} 588218885Sdim 589296417Sdimbool can_execute(const Twine &Path) { 590296417Sdim return !access(Path, AccessMode::Execute) || 591296417Sdim !access(Path + ".exe", AccessMode::Execute); 592296417Sdim} 593296417Sdim 594261991Sdimbool equivalent(file_status A, file_status B) { 595261991Sdim assert(status_known(A) && status_known(B)); 596309124Sdim return A.FileIndexHigh == B.FileIndexHigh && 597309124Sdim A.FileIndexLow == B.FileIndexLow && 598309124Sdim A.FileSizeHigh == B.FileSizeHigh && 599309124Sdim A.FileSizeLow == B.FileSizeLow && 600309124Sdim A.LastAccessedTimeHigh == B.LastAccessedTimeHigh && 601309124Sdim A.LastAccessedTimeLow == B.LastAccessedTimeLow && 602309124Sdim A.LastWriteTimeHigh == B.LastWriteTimeHigh && 603309124Sdim A.LastWriteTimeLow == B.LastWriteTimeLow && 604309124Sdim A.VolumeSerialNumber == B.VolumeSerialNumber; 605218885Sdim} 606218885Sdim 607276479Sdimstd::error_code equivalent(const Twine &A, const Twine &B, bool &result) { 608261991Sdim file_status fsA, fsB; 609276479Sdim if (std::error_code ec = status(A, fsA)) 610276479Sdim return ec; 611276479Sdim if (std::error_code ec = status(B, fsB)) 612276479Sdim return ec; 613261991Sdim result = equivalent(fsA, fsB); 614276479Sdim return std::error_code(); 615261991Sdim} 616218885Sdim 617261991Sdimstatic bool isReservedName(StringRef path) { 618261991Sdim // This list of reserved names comes from MSDN, at: 619261991Sdim // http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx 620296417Sdim static const char *const sReservedNames[] = { "nul", "con", "prn", "aux", 621296417Sdim "com1", "com2", "com3", "com4", 622296417Sdim "com5", "com6", "com7", "com8", 623296417Sdim "com9", "lpt1", "lpt2", "lpt3", 624296417Sdim "lpt4", "lpt5", "lpt6", "lpt7", 625296417Sdim "lpt8", "lpt9" }; 626218885Sdim 627261991Sdim // First, check to see if this is a device namespace, which always 628261991Sdim // starts with \\.\, since device namespaces are not legal file paths. 629261991Sdim if (path.startswith("\\\\.\\")) 630261991Sdim return true; 631261991Sdim 632309124Sdim // Then compare against the list of ancient reserved names. 633261991Sdim for (size_t i = 0; i < array_lengthof(sReservedNames); ++i) { 634261991Sdim if (path.equals_lower(sReservedNames[i])) 635218885Sdim return true; 636218885Sdim } 637218885Sdim 638261991Sdim // The path isn't what we consider reserved. 639218885Sdim return false; 640218885Sdim} 641218885Sdim 642327952Sdimstatic file_type file_type_from_attrs(DWORD Attrs) { 643327952Sdim return (Attrs & FILE_ATTRIBUTE_DIRECTORY) ? file_type::directory_file 644327952Sdim : file_type::regular_file; 645327952Sdim} 646327952Sdim 647327952Sdimstatic perms perms_from_attrs(DWORD Attrs) { 648327952Sdim return (Attrs & FILE_ATTRIBUTE_READONLY) ? (all_read | all_exe) : all_all; 649327952Sdim} 650327952Sdim 651276479Sdimstatic std::error_code getStatus(HANDLE FileHandle, file_status &Result) { 652261991Sdim if (FileHandle == INVALID_HANDLE_VALUE) 653261991Sdim goto handle_status_error; 654261991Sdim 655261991Sdim switch (::GetFileType(FileHandle)) { 656261991Sdim default: 657261991Sdim llvm_unreachable("Don't know anything about this file type"); 658261991Sdim case FILE_TYPE_UNKNOWN: { 659261991Sdim DWORD Err = ::GetLastError(); 660261991Sdim if (Err != NO_ERROR) 661288943Sdim return mapWindowsError(Err); 662261991Sdim Result = file_status(file_type::type_unknown); 663276479Sdim return std::error_code(); 664218885Sdim } 665261991Sdim case FILE_TYPE_DISK: 666261991Sdim break; 667261991Sdim case FILE_TYPE_CHAR: 668261991Sdim Result = file_status(file_type::character_file); 669276479Sdim return std::error_code(); 670261991Sdim case FILE_TYPE_PIPE: 671261991Sdim Result = file_status(file_type::fifo_file); 672276479Sdim return std::error_code(); 673261991Sdim } 674218885Sdim 675261991Sdim BY_HANDLE_FILE_INFORMATION Info; 676261991Sdim if (!::GetFileInformationByHandle(FileHandle, &Info)) 677261991Sdim goto handle_status_error; 678261991Sdim 679327952Sdim Result = file_status( 680327952Sdim file_type_from_attrs(Info.dwFileAttributes), 681327952Sdim perms_from_attrs(Info.dwFileAttributes), Info.nNumberOfLinks, 682327952Sdim Info.ftLastAccessTime.dwHighDateTime, Info.ftLastAccessTime.dwLowDateTime, 683327952Sdim Info.ftLastWriteTime.dwHighDateTime, Info.ftLastWriteTime.dwLowDateTime, 684327952Sdim Info.dwVolumeSerialNumber, Info.nFileSizeHigh, Info.nFileSizeLow, 685327952Sdim Info.nFileIndexHigh, Info.nFileIndexLow); 686327952Sdim return std::error_code(); 687218885Sdim 688261991Sdimhandle_status_error: 689276479Sdim DWORD LastError = ::GetLastError(); 690276479Sdim if (LastError == ERROR_FILE_NOT_FOUND || 691276479Sdim LastError == ERROR_PATH_NOT_FOUND) 692261991Sdim Result = file_status(file_type::file_not_found); 693276479Sdim else if (LastError == ERROR_SHARING_VIOLATION) 694261991Sdim Result = file_status(file_type::type_unknown); 695218885Sdim else 696261991Sdim Result = file_status(file_type::status_error); 697288943Sdim return mapWindowsError(LastError); 698261991Sdim} 699218885Sdim 700321369Sdimstd::error_code status(const Twine &path, file_status &result, bool Follow) { 701261991Sdim SmallString<128> path_storage; 702261991Sdim SmallVector<wchar_t, 128> path_utf16; 703261991Sdim 704261991Sdim StringRef path8 = path.toStringRef(path_storage); 705261991Sdim if (isReservedName(path8)) { 706261991Sdim result = file_status(file_type::character_file); 707276479Sdim return std::error_code(); 708218885Sdim } 709218885Sdim 710280031Sdim if (std::error_code ec = widenPath(path8, path_utf16)) 711261991Sdim return ec; 712218885Sdim 713261991Sdim DWORD attr = ::GetFileAttributesW(path_utf16.begin()); 714261991Sdim if (attr == INVALID_FILE_ATTRIBUTES) 715261991Sdim return getStatus(INVALID_HANDLE_VALUE, result); 716261991Sdim 717321369Sdim DWORD Flags = FILE_FLAG_BACKUP_SEMANTICS; 718261991Sdim // Handle reparse points. 719321369Sdim if (!Follow && (attr & FILE_ATTRIBUTE_REPARSE_POINT)) 720321369Sdim Flags |= FILE_FLAG_OPEN_REPARSE_POINT; 721261991Sdim 722261991Sdim ScopedFileHandle h( 723261991Sdim ::CreateFileW(path_utf16.begin(), 0, // Attributes only. 724261991Sdim FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, 725321369Sdim NULL, OPEN_EXISTING, Flags, 0)); 726321369Sdim if (!h) 727321369Sdim return getStatus(INVALID_HANDLE_VALUE, result); 728261991Sdim 729321369Sdim return getStatus(h, result); 730218885Sdim} 731218885Sdim 732276479Sdimstd::error_code status(int FD, file_status &Result) { 733261991Sdim HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD)); 734261991Sdim return getStatus(FileHandle, Result); 735261991Sdim} 736261991Sdim 737353358Sdimstd::error_code status(file_t FileHandle, file_status &Result) { 738353358Sdim return getStatus(FileHandle, Result); 739353358Sdim} 740353358Sdim 741353358Sdimunsigned getUmask() { 742353358Sdim return 0; 743353358Sdim} 744353358Sdim 745321369Sdimstd::error_code setPermissions(const Twine &Path, perms Permissions) { 746321369Sdim SmallVector<wchar_t, 128> PathUTF16; 747321369Sdim if (std::error_code EC = widenPath(Path, PathUTF16)) 748321369Sdim return EC; 749321369Sdim 750321369Sdim DWORD Attributes = ::GetFileAttributesW(PathUTF16.begin()); 751321369Sdim if (Attributes == INVALID_FILE_ATTRIBUTES) 752321369Sdim return mapWindowsError(GetLastError()); 753321369Sdim 754321369Sdim // There are many Windows file attributes that are not to do with the file 755321369Sdim // permissions (e.g. FILE_ATTRIBUTE_HIDDEN). We need to be careful to preserve 756321369Sdim // them. 757321369Sdim if (Permissions & all_write) { 758321369Sdim Attributes &= ~FILE_ATTRIBUTE_READONLY; 759321369Sdim if (Attributes == 0) 760321369Sdim // FILE_ATTRIBUTE_NORMAL indicates no other attributes are set. 761321369Sdim Attributes |= FILE_ATTRIBUTE_NORMAL; 762321369Sdim } 763321369Sdim else { 764321369Sdim Attributes |= FILE_ATTRIBUTE_READONLY; 765321369Sdim // FILE_ATTRIBUTE_NORMAL is not compatible with any other attributes, so 766321369Sdim // remove it, if it is present. 767321369Sdim Attributes &= ~FILE_ATTRIBUTE_NORMAL; 768321369Sdim } 769321369Sdim 770321369Sdim if (!::SetFileAttributesW(PathUTF16.begin(), Attributes)) 771321369Sdim return mapWindowsError(GetLastError()); 772321369Sdim 773321369Sdim return std::error_code(); 774321369Sdim} 775321369Sdim 776353358Sdimstd::error_code setPermissions(int FD, perms Permissions) { 777353358Sdim // FIXME Not implemented. 778353358Sdim return std::make_error_code(std::errc::not_supported); 779353358Sdim} 780353358Sdim 781344779Sdimstd::error_code setLastAccessAndModificationTime(int FD, TimePoint<> AccessTime, 782344779Sdim TimePoint<> ModificationTime) { 783344779Sdim FILETIME AccessFT = toFILETIME(AccessTime); 784344779Sdim FILETIME ModifyFT = toFILETIME(ModificationTime); 785261991Sdim HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD)); 786344779Sdim if (!SetFileTime(FileHandle, NULL, &AccessFT, &ModifyFT)) 787288943Sdim return mapWindowsError(::GetLastError()); 788276479Sdim return std::error_code(); 789261991Sdim} 790261991Sdim 791353358Sdimstd::error_code mapped_file_region::init(sys::fs::file_t OrigFileHandle, 792353358Sdim uint64_t Offset, mapmode Mode) { 793341825Sdim this->Mode = Mode; 794341825Sdim if (OrigFileHandle == INVALID_HANDLE_VALUE) 795280031Sdim return make_error_code(errc::bad_file_descriptor); 796280031Sdim 797261991Sdim DWORD flprotect; 798261991Sdim switch (Mode) { 799261991Sdim case readonly: flprotect = PAGE_READONLY; break; 800261991Sdim case readwrite: flprotect = PAGE_READWRITE; break; 801261991Sdim case priv: flprotect = PAGE_WRITECOPY; break; 802218885Sdim } 803218885Sdim 804280031Sdim HANDLE FileMappingHandle = 805341825Sdim ::CreateFileMappingW(OrigFileHandle, 0, flprotect, 806327952Sdim Hi_32(Size), 807327952Sdim Lo_32(Size), 808261991Sdim 0); 809261991Sdim if (FileMappingHandle == NULL) { 810288943Sdim std::error_code ec = mapWindowsError(GetLastError()); 811261991Sdim return ec; 812218885Sdim } 813218885Sdim 814261991Sdim DWORD dwDesiredAccess; 815261991Sdim switch (Mode) { 816261991Sdim case readonly: dwDesiredAccess = FILE_MAP_READ; break; 817261991Sdim case readwrite: dwDesiredAccess = FILE_MAP_WRITE; break; 818261991Sdim case priv: dwDesiredAccess = FILE_MAP_COPY; break; 819261991Sdim } 820261991Sdim Mapping = ::MapViewOfFile(FileMappingHandle, 821261991Sdim dwDesiredAccess, 822261991Sdim Offset >> 32, 823261991Sdim Offset & 0xffffffff, 824261991Sdim Size); 825261991Sdim if (Mapping == NULL) { 826288943Sdim std::error_code ec = mapWindowsError(GetLastError()); 827261991Sdim ::CloseHandle(FileMappingHandle); 828261991Sdim return ec; 829261991Sdim } 830261991Sdim 831261991Sdim if (Size == 0) { 832261991Sdim MEMORY_BASIC_INFORMATION mbi; 833261991Sdim SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi)); 834261991Sdim if (Result == 0) { 835288943Sdim std::error_code ec = mapWindowsError(GetLastError()); 836261991Sdim ::UnmapViewOfFile(Mapping); 837261991Sdim ::CloseHandle(FileMappingHandle); 838261991Sdim return ec; 839218885Sdim } 840261991Sdim Size = mbi.RegionSize; 841218885Sdim } 842218885Sdim 843341825Sdim // Close the file mapping handle, as it's kept alive by the file mapping. But 844341825Sdim // neither the file mapping nor the file mapping handle keep the file handle 845341825Sdim // alive, so we need to keep a reference to the file in case all other handles 846341825Sdim // are closed and the file is deleted, which may cause invalid data to be read 847341825Sdim // from the file. 848261991Sdim ::CloseHandle(FileMappingHandle); 849341825Sdim if (!::DuplicateHandle(::GetCurrentProcess(), OrigFileHandle, 850341825Sdim ::GetCurrentProcess(), &FileHandle, 0, 0, 851341825Sdim DUPLICATE_SAME_ACCESS)) { 852341825Sdim std::error_code ec = mapWindowsError(GetLastError()); 853341825Sdim ::UnmapViewOfFile(Mapping); 854341825Sdim return ec; 855341825Sdim } 856341825Sdim 857276479Sdim return std::error_code(); 858218885Sdim} 859218885Sdim 860353358Sdimmapped_file_region::mapped_file_region(sys::fs::file_t fd, mapmode mode, 861353358Sdim size_t length, uint64_t offset, 862353358Sdim std::error_code &ec) 863280031Sdim : Size(length), Mapping() { 864280031Sdim ec = init(fd, offset, mode); 865280031Sdim if (ec) 866280031Sdim Mapping = 0; 867261991Sdim} 868218885Sdim 869344779Sdimstatic bool hasFlushBufferKernelBug() { 870344779Sdim static bool Ret{GetWindowsOSVersion() < llvm::VersionTuple(10, 0, 0, 17763)}; 871344779Sdim return Ret; 872344779Sdim} 873344779Sdim 874344779Sdimstatic bool isEXE(StringRef Magic) { 875344779Sdim static const char PEMagic[] = {'P', 'E', '\0', '\0'}; 876344779Sdim if (Magic.startswith(StringRef("MZ")) && Magic.size() >= 0x3c + 4) { 877344779Sdim uint32_t off = read32le(Magic.data() + 0x3c); 878344779Sdim // PE/COFF file, either EXE or DLL. 879344779Sdim if (Magic.substr(off).startswith(StringRef(PEMagic, sizeof(PEMagic)))) 880344779Sdim return true; 881344779Sdim } 882344779Sdim return false; 883344779Sdim} 884344779Sdim 885261991Sdimmapped_file_region::~mapped_file_region() { 886341825Sdim if (Mapping) { 887344779Sdim 888344779Sdim bool Exe = isEXE(StringRef((char *)Mapping, Size)); 889344779Sdim 890261991Sdim ::UnmapViewOfFile(Mapping); 891341825Sdim 892344779Sdim if (Mode == mapmode::readwrite && Exe && hasFlushBufferKernelBug()) { 893341825Sdim // There is a Windows kernel bug, the exact trigger conditions of which 894341825Sdim // are not well understood. When triggered, dirty pages are not properly 895341825Sdim // flushed and subsequent process's attempts to read a file can return 896341825Sdim // invalid data. Calling FlushFileBuffers on the write handle is 897341825Sdim // sufficient to ensure that this bug is not triggered. 898344779Sdim // The bug only occurs when writing an executable and executing it right 899344779Sdim // after, under high I/O pressure. 900341825Sdim ::FlushFileBuffers(FileHandle); 901341825Sdim } 902341825Sdim 903341825Sdim ::CloseHandle(FileHandle); 904341825Sdim } 905261991Sdim} 906218885Sdim 907327952Sdimsize_t mapped_file_region::size() const { 908261991Sdim assert(Mapping && "Mapping failed but used anyway!"); 909261991Sdim return Size; 910261991Sdim} 911218885Sdim 912261991Sdimchar *mapped_file_region::data() const { 913261991Sdim assert(Mapping && "Mapping failed but used anyway!"); 914261991Sdim return reinterpret_cast<char*>(Mapping); 915261991Sdim} 916218885Sdim 917261991Sdimconst char *mapped_file_region::const_data() const { 918261991Sdim assert(Mapping && "Mapping failed but used anyway!"); 919261991Sdim return reinterpret_cast<const char*>(Mapping); 920261991Sdim} 921218885Sdim 922261991Sdimint mapped_file_region::alignment() { 923261991Sdim SYSTEM_INFO SysInfo; 924261991Sdim ::GetSystemInfo(&SysInfo); 925261991Sdim return SysInfo.dwAllocationGranularity; 926261991Sdim} 927218885Sdim 928327952Sdimstatic basic_file_status status_from_find_data(WIN32_FIND_DATAW *FindData) { 929327952Sdim return basic_file_status(file_type_from_attrs(FindData->dwFileAttributes), 930327952Sdim perms_from_attrs(FindData->dwFileAttributes), 931327952Sdim FindData->ftLastAccessTime.dwHighDateTime, 932327952Sdim FindData->ftLastAccessTime.dwLowDateTime, 933327952Sdim FindData->ftLastWriteTime.dwHighDateTime, 934327952Sdim FindData->ftLastWriteTime.dwLowDateTime, 935327952Sdim FindData->nFileSizeHigh, FindData->nFileSizeLow); 936327952Sdim} 937327952Sdim 938344779Sdimstd::error_code detail::directory_iterator_construct(detail::DirIterState &IT, 939344779Sdim StringRef Path, 940344779Sdim bool FollowSymlinks) { 941344779Sdim SmallVector<wchar_t, 128> PathUTF16; 942218885Sdim 943344779Sdim if (std::error_code EC = widenPath(Path, PathUTF16)) 944344779Sdim return EC; 945218885Sdim 946261991Sdim // Convert path to the format that Windows is happy with. 947344779Sdim if (PathUTF16.size() > 0 && 948344779Sdim !is_separator(PathUTF16[Path.size() - 1]) && 949344779Sdim PathUTF16[Path.size() - 1] != L':') { 950344779Sdim PathUTF16.push_back(L'\\'); 951344779Sdim PathUTF16.push_back(L'*'); 952261991Sdim } else { 953344779Sdim PathUTF16.push_back(L'*'); 954261991Sdim } 955218885Sdim 956261991Sdim // Get the first directory entry. 957261991Sdim WIN32_FIND_DATAW FirstFind; 958327952Sdim ScopedFindHandle FindHandle(::FindFirstFileExW( 959344779Sdim c_str(PathUTF16), FindExInfoBasic, &FirstFind, FindExSearchNameMatch, 960327952Sdim NULL, FIND_FIRST_EX_LARGE_FETCH)); 961261991Sdim if (!FindHandle) 962288943Sdim return mapWindowsError(::GetLastError()); 963218885Sdim 964261991Sdim size_t FilenameLen = ::wcslen(FirstFind.cFileName); 965261991Sdim while ((FilenameLen == 1 && FirstFind.cFileName[0] == L'.') || 966261991Sdim (FilenameLen == 2 && FirstFind.cFileName[0] == L'.' && 967261991Sdim FirstFind.cFileName[1] == L'.')) 968261991Sdim if (!::FindNextFileW(FindHandle, &FirstFind)) { 969276479Sdim DWORD LastError = ::GetLastError(); 970261991Sdim // Check for end. 971276479Sdim if (LastError == ERROR_NO_MORE_FILES) 972344779Sdim return detail::directory_iterator_destruct(IT); 973288943Sdim return mapWindowsError(LastError); 974261991Sdim } else 975261991Sdim FilenameLen = ::wcslen(FirstFind.cFileName); 976218885Sdim 977261991Sdim // Construct the current directory entry. 978344779Sdim SmallString<128> DirectoryEntryNameUTF8; 979344779Sdim if (std::error_code EC = 980276479Sdim UTF16ToUTF8(FirstFind.cFileName, ::wcslen(FirstFind.cFileName), 981344779Sdim DirectoryEntryNameUTF8)) 982344779Sdim return EC; 983218885Sdim 984344779Sdim IT.IterationHandle = intptr_t(FindHandle.take()); 985344779Sdim SmallString<128> DirectoryEntryPath(Path); 986344779Sdim path::append(DirectoryEntryPath, DirectoryEntryNameUTF8); 987344779Sdim IT.CurrentEntry = 988344779Sdim directory_entry(DirectoryEntryPath, FollowSymlinks, 989344779Sdim file_type_from_attrs(FirstFind.dwFileAttributes), 990344779Sdim status_from_find_data(&FirstFind)); 991218885Sdim 992276479Sdim return std::error_code(); 993218885Sdim} 994218885Sdim 995344779Sdimstd::error_code detail::directory_iterator_destruct(detail::DirIterState &IT) { 996344779Sdim if (IT.IterationHandle != 0) 997261991Sdim // Closes the handle if it's valid. 998344779Sdim ScopedFindHandle close(HANDLE(IT.IterationHandle)); 999344779Sdim IT.IterationHandle = 0; 1000344779Sdim IT.CurrentEntry = directory_entry(); 1001276479Sdim return std::error_code(); 1002261991Sdim} 1003218885Sdim 1004344779Sdimstd::error_code detail::directory_iterator_increment(detail::DirIterState &IT) { 1005261991Sdim WIN32_FIND_DATAW FindData; 1006344779Sdim if (!::FindNextFileW(HANDLE(IT.IterationHandle), &FindData)) { 1007276479Sdim DWORD LastError = ::GetLastError(); 1008261991Sdim // Check for end. 1009276479Sdim if (LastError == ERROR_NO_MORE_FILES) 1010344779Sdim return detail::directory_iterator_destruct(IT); 1011288943Sdim return mapWindowsError(LastError); 1012261991Sdim } 1013218885Sdim 1014261991Sdim size_t FilenameLen = ::wcslen(FindData.cFileName); 1015261991Sdim if ((FilenameLen == 1 && FindData.cFileName[0] == L'.') || 1016261991Sdim (FilenameLen == 2 && FindData.cFileName[0] == L'.' && 1017261991Sdim FindData.cFileName[1] == L'.')) 1018344779Sdim return directory_iterator_increment(IT); 1019218885Sdim 1020344779Sdim SmallString<128> DirectoryEntryPathUTF8; 1021344779Sdim if (std::error_code EC = 1022276479Sdim UTF16ToUTF8(FindData.cFileName, ::wcslen(FindData.cFileName), 1023344779Sdim DirectoryEntryPathUTF8)) 1024344779Sdim return EC; 1025218885Sdim 1026344779Sdim IT.CurrentEntry.replace_filename( 1027344779Sdim Twine(DirectoryEntryPathUTF8), 1028344779Sdim file_type_from_attrs(FindData.dwFileAttributes), 1029344779Sdim status_from_find_data(&FindData)); 1030276479Sdim return std::error_code(); 1031218885Sdim} 1032218885Sdim 1033327952SdimErrorOr<basic_file_status> directory_entry::status() const { 1034327952Sdim return Status; 1035321369Sdim} 1036321369Sdim 1037341825Sdimstatic std::error_code nativeFileToFd(Expected<HANDLE> H, int &ResultFD, 1038341825Sdim OpenFlags Flags) { 1039341825Sdim int CrtOpenFlags = 0; 1040341825Sdim if (Flags & OF_Append) 1041341825Sdim CrtOpenFlags |= _O_APPEND; 1042321369Sdim 1043341825Sdim if (Flags & OF_Text) 1044341825Sdim CrtOpenFlags |= _O_TEXT; 1045321369Sdim 1046341825Sdim ResultFD = -1; 1047341825Sdim if (!H) 1048341825Sdim return errorToErrorCode(H.takeError()); 1049341825Sdim 1050341825Sdim ResultFD = ::_open_osfhandle(intptr_t(*H), CrtOpenFlags); 1051341825Sdim if (ResultFD == -1) { 1052341825Sdim ::CloseHandle(*H); 1053341825Sdim return mapWindowsError(ERROR_INVALID_HANDLE); 1054341825Sdim } 1055341825Sdim return std::error_code(); 1056321369Sdim} 1057321369Sdim 1058341825Sdimstatic DWORD nativeDisposition(CreationDisposition Disp, OpenFlags Flags) { 1059341825Sdim // This is a compatibility hack. Really we should respect the creation 1060341825Sdim // disposition, but a lot of old code relied on the implicit assumption that 1061341825Sdim // OF_Append implied it would open an existing file. Since the disposition is 1062341825Sdim // now explicit and defaults to CD_CreateAlways, this assumption would cause 1063341825Sdim // any usage of OF_Append to append to a new file, even if the file already 1064341825Sdim // existed. A better solution might have two new creation dispositions: 1065341825Sdim // CD_AppendAlways and CD_AppendNew. This would also address the problem of 1066341825Sdim // OF_Append being used on a read-only descriptor, which doesn't make sense. 1067341825Sdim if (Flags & OF_Append) 1068341825Sdim return OPEN_ALWAYS; 1069341825Sdim 1070341825Sdim switch (Disp) { 1071341825Sdim case CD_CreateAlways: 1072341825Sdim return CREATE_ALWAYS; 1073341825Sdim case CD_CreateNew: 1074341825Sdim return CREATE_NEW; 1075341825Sdim case CD_OpenAlways: 1076341825Sdim return OPEN_ALWAYS; 1077341825Sdim case CD_OpenExisting: 1078341825Sdim return OPEN_EXISTING; 1079341825Sdim } 1080341825Sdim llvm_unreachable("unreachable!"); 1081341825Sdim} 1082341825Sdim 1083341825Sdimstatic DWORD nativeAccess(FileAccess Access, OpenFlags Flags) { 1084341825Sdim DWORD Result = 0; 1085341825Sdim if (Access & FA_Read) 1086341825Sdim Result |= GENERIC_READ; 1087341825Sdim if (Access & FA_Write) 1088341825Sdim Result |= GENERIC_WRITE; 1089341825Sdim if (Flags & OF_Delete) 1090341825Sdim Result |= DELETE; 1091341825Sdim if (Flags & OF_UpdateAtime) 1092341825Sdim Result |= FILE_WRITE_ATTRIBUTES; 1093341825Sdim return Result; 1094341825Sdim} 1095341825Sdim 1096341825Sdimstatic std::error_code openNativeFileInternal(const Twine &Name, 1097341825Sdim file_t &ResultFile, DWORD Disp, 1098341825Sdim DWORD Access, DWORD Flags, 1099341825Sdim bool Inherit = false) { 1100261991Sdim SmallVector<wchar_t, 128> PathUTF16; 1101280031Sdim if (std::error_code EC = widenPath(Name, PathUTF16)) 1102261991Sdim return EC; 1103218885Sdim 1104341825Sdim SECURITY_ATTRIBUTES SA; 1105341825Sdim SA.nLength = sizeof(SA); 1106341825Sdim SA.lpSecurityDescriptor = nullptr; 1107341825Sdim SA.bInheritHandle = Inherit; 1108341825Sdim 1109296417Sdim HANDLE H = 1110341825Sdim ::CreateFileW(PathUTF16.begin(), Access, 1111341825Sdim FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, &SA, 1112341825Sdim Disp, Flags, NULL); 1113261991Sdim if (H == INVALID_HANDLE_VALUE) { 1114276479Sdim DWORD LastError = ::GetLastError(); 1115288943Sdim std::error_code EC = mapWindowsError(LastError); 1116261991Sdim // Provide a better error message when trying to open directories. 1117261991Sdim // This only runs if we failed to open the file, so there is probably 1118261991Sdim // no performances issues. 1119276479Sdim if (LastError != ERROR_ACCESS_DENIED) 1120261991Sdim return EC; 1121261991Sdim if (is_directory(Name)) 1122276479Sdim return make_error_code(errc::is_a_directory); 1123261991Sdim return EC; 1124218885Sdim } 1125341825Sdim ResultFile = H; 1126276479Sdim return std::error_code(); 1127218885Sdim} 1128218885Sdim 1129341825SdimExpectedopenNativeFile(const Twine &Name, CreationDisposition Disp, 1130341825Sdim FileAccess Access, OpenFlags Flags, 1131341825Sdim unsigned Mode) { 1132261991Sdim // Verify that we don't have both "append" and "excl". 1133341825Sdim assert((!(Disp == CD_CreateNew) || !(Flags & OF_Append)) && 1134341825Sdim "Cannot specify both 'CreateNew' and 'Append' file creation flags!"); 1135218885Sdim 1136341825Sdim DWORD NativeDisp = nativeDisposition(Disp, Flags); 1137341825Sdim DWORD NativeAccess = nativeAccess(Access, Flags); 1138218885Sdim 1139341825Sdim bool Inherit = false; 1140341825Sdim if (Flags & OF_ChildInherit) 1141341825Sdim Inherit = true; 1142218885Sdim 1143341825Sdim file_t Result; 1144341825Sdim std::error_code EC = openNativeFileInternal( 1145341825Sdim Name, Result, NativeDisp, NativeAccess, FILE_ATTRIBUTE_NORMAL, Inherit); 1146341825Sdim if (EC) 1147341825Sdim return errorCodeToError(EC); 1148261991Sdim 1149341825Sdim if (Flags & OF_UpdateAtime) { 1150341825Sdim FILETIME FileTime; 1151341825Sdim SYSTEMTIME SystemTime; 1152341825Sdim GetSystemTime(&SystemTime); 1153341825Sdim if (SystemTimeToFileTime(&SystemTime, &FileTime) == 0 || 1154341825Sdim SetFileTime(Result, NULL, &FileTime, NULL) == 0) { 1155341825Sdim DWORD LastError = ::GetLastError(); 1156341825Sdim ::CloseHandle(Result); 1157341825Sdim return errorCodeToError(mapWindowsError(LastError)); 1158341825Sdim } 1159327952Sdim } 1160276479Sdim 1161341825Sdim if (Flags & OF_Delete) { 1162341825Sdim if ((EC = setDeleteDisposition(Result, true))) { 1163341825Sdim ::CloseHandle(Result); 1164341825Sdim return errorCodeToError(EC); 1165341825Sdim } 1166341825Sdim } 1167341825Sdim return Result; 1168341825Sdim} 1169261991Sdim 1170341825Sdimstd::error_code openFile(const Twine &Name, int &ResultFD, 1171341825Sdim CreationDisposition Disp, FileAccess Access, 1172341825Sdim OpenFlags Flags, unsigned int Mode) { 1173341825Sdim Expected<file_t> Result = openNativeFile(Name, Disp, Access, Flags); 1174341825Sdim if (!Result) 1175341825Sdim return errorToErrorCode(Result.takeError()); 1176341825Sdim 1177341825Sdim return nativeFileToFd(*Result, ResultFD, Flags); 1178341825Sdim} 1179341825Sdim 1180341825Sdimstatic std::error_code directoryRealPath(const Twine &Name, 1181341825Sdim SmallVectorImpl<char> &RealPath) { 1182341825Sdim file_t File; 1183341825Sdim std::error_code EC = openNativeFileInternal( 1184341825Sdim Name, File, OPEN_EXISTING, GENERIC_READ, FILE_FLAG_BACKUP_SEMANTICS); 1185341825Sdim if (EC) 1186261991Sdim return EC; 1187218885Sdim 1188341825Sdim EC = realPathFromHandle(File, RealPath); 1189341825Sdim ::CloseHandle(File); 1190341825Sdim return EC; 1191341825Sdim} 1192218885Sdim 1193341825Sdimstd::error_code openFileForRead(const Twine &Name, int &ResultFD, 1194341825Sdim OpenFlags Flags, 1195341825Sdim SmallVectorImpl<char> *RealPath) { 1196341825Sdim Expected<HANDLE> NativeFile = openNativeFileForRead(Name, Flags, RealPath); 1197341825Sdim return nativeFileToFd(std::move(NativeFile), ResultFD, OF_None); 1198341825Sdim} 1199218885Sdim 1200341825SdimExpected<file_t> openNativeFileForRead(const Twine &Name, OpenFlags Flags, 1201341825Sdim SmallVectorImpl<char> *RealPath) { 1202341825Sdim Expected<file_t> Result = 1203341825Sdim openNativeFile(Name, CD_OpenExisting, FA_Read, Flags); 1204218885Sdim 1205341825Sdim // Fetch the real name of the file, if the user asked 1206341825Sdim if (Result && RealPath) 1207341825Sdim realPathFromHandle(*Result, *RealPath); 1208341825Sdim 1209341825Sdim return Result; 1210218885Sdim} 1211309124Sdim 1212353358Sdimfile_t convertFDToNativeFile(int FD) { 1213353358Sdim return reinterpret_cast<HANDLE>(::_get_osfhandle(FD)); 1214353358Sdim} 1215353358Sdim 1216353358Sdimfile_t getStdinHandle() { return ::GetStdHandle(STD_INPUT_HANDLE); } 1217353358Sdimfile_t getStdoutHandle() { return ::GetStdHandle(STD_OUTPUT_HANDLE); } 1218353358Sdimfile_t getStderrHandle() { return ::GetStdHandle(STD_ERROR_HANDLE); } 1219353358Sdim 1220353358Sdimstd::error_code readNativeFileImpl(file_t FileHandle, char *BufPtr, size_t BytesToRead, 1221353358Sdim size_t *BytesRead, OVERLAPPED *Overlap) { 1222353358Sdim // ReadFile can only read 2GB at a time. The caller should check the number of 1223353358Sdim // bytes and read in a loop until termination. 1224353358Sdim DWORD BytesToRead32 = 1225353358Sdim std::min(size_t(std::numeric_limits<DWORD>::max()), BytesToRead); 1226353358Sdim DWORD BytesRead32 = 0; 1227353358Sdim bool Success = 1228353358Sdim ::ReadFile(FileHandle, BufPtr, BytesToRead32, &BytesRead32, Overlap); 1229353358Sdim *BytesRead = BytesRead32; 1230353358Sdim if (!Success) { 1231353358Sdim DWORD Err = ::GetLastError(); 1232353358Sdim // Pipe EOF is not an error. 1233353358Sdim if (Err == ERROR_BROKEN_PIPE) 1234353358Sdim return std::error_code(); 1235353358Sdim return mapWindowsError(Err); 1236353358Sdim } 1237353358Sdim return std::error_code(); 1238353358Sdim} 1239353358Sdim 1240353358Sdimstd::error_code readNativeFile(file_t FileHandle, MutableArrayRef<char> Buf, 1241353358Sdim size_t *BytesRead) { 1242353358Sdim return readNativeFileImpl(FileHandle, Buf.data(), Buf.size(), BytesRead, 1243353358Sdim /*Overlap=*/nullptr); 1244353358Sdim} 1245353358Sdim 1246353358Sdimstd::error_code readNativeFileSlice(file_t FileHandle, 1247353358Sdim MutableArrayRef<char> Buf, size_t Offset) { 1248353358Sdim char *BufPtr = Buf.data(); 1249353358Sdim size_t BytesLeft = Buf.size(); 1250353358Sdim 1251353358Sdim while (BytesLeft) { 1252353358Sdim uint64_t CurOff = Buf.size() - BytesLeft + Offset; 1253353358Sdim OVERLAPPED Overlapped = {}; 1254353358Sdim Overlapped.Offset = uint32_t(CurOff); 1255353358Sdim Overlapped.OffsetHigh = uint32_t(uint64_t(CurOff) >> 32); 1256353358Sdim 1257353358Sdim size_t BytesRead = 0; 1258353358Sdim if (auto EC = readNativeFileImpl(FileHandle, BufPtr, BytesLeft, &BytesRead, 1259353358Sdim &Overlapped)) 1260353358Sdim return EC; 1261353358Sdim 1262353358Sdim // Once we reach EOF, zero the remaining bytes in the buffer. 1263353358Sdim if (BytesRead == 0) { 1264353358Sdim memset(BufPtr, 0, BytesLeft); 1265353358Sdim break; 1266353358Sdim } 1267353358Sdim BytesLeft -= BytesRead; 1268353358Sdim BufPtr += BytesRead; 1269353358Sdim } 1270353358Sdim return std::error_code(); 1271353358Sdim} 1272353358Sdim 1273353358Sdimstd::error_code closeFile(file_t &F) { 1274353358Sdim file_t TmpF = F; 1275341825Sdim F = kInvalidFile; 1276353358Sdim if (!::CloseHandle(TmpF)) 1277353358Sdim return mapWindowsError(::GetLastError()); 1278353358Sdim return std::error_code(); 1279341825Sdim} 1280341825Sdim 1281321369Sdimstd::error_code remove_directories(const Twine &path, bool IgnoreErrors) { 1282321369Sdim // Convert to utf-16. 1283321369Sdim SmallVector<wchar_t, 128> Path16; 1284321369Sdim std::error_code EC = widenPath(path, Path16); 1285321369Sdim if (EC && !IgnoreErrors) 1286321369Sdim return EC; 1287321369Sdim 1288321369Sdim // SHFileOperation() accepts a list of paths, and so must be double null- 1289321369Sdim // terminated to indicate the end of the list. The buffer is already null 1290321369Sdim // terminated, but since that null character is not considered part of the 1291321369Sdim // vector's size, pushing another one will just consume that byte. So we 1292321369Sdim // need to push 2 null terminators. 1293321369Sdim Path16.push_back(0); 1294321369Sdim Path16.push_back(0); 1295321369Sdim 1296321369Sdim SHFILEOPSTRUCTW shfos = {}; 1297321369Sdim shfos.wFunc = FO_DELETE; 1298321369Sdim shfos.pFrom = Path16.data(); 1299321369Sdim shfos.fFlags = FOF_NO_UI; 1300321369Sdim 1301321369Sdim int result = ::SHFileOperationW(&shfos); 1302321369Sdim if (result != 0 && !IgnoreErrors) 1303321369Sdim return mapWindowsError(result); 1304321369Sdim return std::error_code(); 1305321369Sdim} 1306321369Sdim 1307321369Sdimstatic void expandTildeExpr(SmallVectorImpl<char> &Path) { 1308321369Sdim // Path does not begin with a tilde expression. 1309321369Sdim if (Path.empty() || Path[0] != '~') 1310321369Sdim return; 1311321369Sdim 1312321369Sdim StringRef PathStr(Path.begin(), Path.size()); 1313321369Sdim PathStr = PathStr.drop_front(); 1314321369Sdim StringRef Expr = PathStr.take_until([](char c) { return path::is_separator(c); }); 1315321369Sdim 1316321369Sdim if (!Expr.empty()) { 1317321369Sdim // This is probably a ~username/ expression. Don't support this on Windows. 1318321369Sdim return; 1319321369Sdim } 1320321369Sdim 1321321369Sdim SmallString<128> HomeDir; 1322321369Sdim if (!path::home_directory(HomeDir)) { 1323321369Sdim // For some reason we couldn't get the home directory. Just exit. 1324321369Sdim return; 1325321369Sdim } 1326321369Sdim 1327321369Sdim // Overwrite the first character and insert the rest. 1328321369Sdim Path[0] = HomeDir[0]; 1329321369Sdim Path.insert(Path.begin() + 1, HomeDir.begin() + 1, HomeDir.end()); 1330321369Sdim} 1331321369Sdim 1332344779Sdimvoid expand_tilde(const Twine &path, SmallVectorImpl<char> &dest) { 1333344779Sdim dest.clear(); 1334344779Sdim if (path.isTriviallyEmpty()) 1335344779Sdim return; 1336344779Sdim 1337344779Sdim path.toVector(dest); 1338344779Sdim expandTildeExpr(dest); 1339344779Sdim 1340344779Sdim return; 1341344779Sdim} 1342344779Sdim 1343321369Sdimstd::error_code real_path(const Twine &path, SmallVectorImpl<char> &dest, 1344321369Sdim bool expand_tilde) { 1345321369Sdim dest.clear(); 1346321369Sdim if (path.isTriviallyEmpty()) 1347321369Sdim return std::error_code(); 1348321369Sdim 1349321369Sdim if (expand_tilde) { 1350321369Sdim SmallString<128> Storage; 1351321369Sdim path.toVector(Storage); 1352321369Sdim expandTildeExpr(Storage); 1353321369Sdim return real_path(Storage, dest, false); 1354321369Sdim } 1355321369Sdim 1356321369Sdim if (is_directory(path)) 1357321369Sdim return directoryRealPath(path, dest); 1358321369Sdim 1359321369Sdim int fd; 1360341825Sdim if (std::error_code EC = 1361341825Sdim llvm::sys::fs::openFileForRead(path, fd, OF_None, &dest)) 1362321369Sdim return EC; 1363321369Sdim ::close(fd); 1364321369Sdim return std::error_code(); 1365321369Sdim} 1366321369Sdim 1367261991Sdim} // end namespace fs 1368218885Sdim 1369276479Sdimnamespace path { 1370296417Sdimstatic bool getKnownFolderPath(KNOWNFOLDERID folderId, 1371296417Sdim SmallVectorImpl<char> &result) { 1372296417Sdim wchar_t *path = nullptr; 1373296417Sdim if (::SHGetKnownFolderPath(folderId, KF_FLAG_CREATE, nullptr, &path) != S_OK) 1374276479Sdim return false; 1375276479Sdim 1376296417Sdim bool ok = !UTF16ToUTF8(path, ::wcslen(path), result); 1377296417Sdim ::CoTaskMemFree(path); 1378296417Sdim return ok; 1379296417Sdim} 1380276479Sdim 1381296417Sdimbool home_directory(SmallVectorImpl<char> &result) { 1382296417Sdim return getKnownFolderPath(FOLDERID_Profile, result); 1383296417Sdim} 1384280031Sdim 1385296417Sdimstatic bool getTempDirEnvVar(const wchar_t *Var, SmallVectorImpl<char> &Res) { 1386280031Sdim SmallVector<wchar_t, 1024> Buf; 1387280031Sdim size_t Size = 1024; 1388280031Sdim do { 1389280031Sdim Buf.reserve(Size); 1390296417Sdim Size = GetEnvironmentVariableW(Var, Buf.data(), Buf.capacity()); 1391280031Sdim if (Size == 0) 1392280031Sdim return false; 1393280031Sdim 1394280031Sdim // Try again with larger buffer. 1395280031Sdim } while (Size > Buf.capacity()); 1396280031Sdim Buf.set_size(Size); 1397280031Sdim 1398296417Sdim return !windows::UTF16ToUTF8(Buf.data(), Size, Res); 1399280031Sdim} 1400280031Sdim 1401280031Sdimstatic bool getTempDirEnvVar(SmallVectorImpl<char> &Res) { 1402296417Sdim const wchar_t *EnvironmentVariables[] = {L"TMP", L"TEMP", L"USERPROFILE"}; 1403296417Sdim for (auto *Env : EnvironmentVariables) { 1404280031Sdim if (getTempDirEnvVar(Env, Res)) 1405280031Sdim return true; 1406280031Sdim } 1407280031Sdim return false; 1408280031Sdim} 1409280031Sdim 1410280031Sdimvoid system_temp_directory(bool ErasedOnReboot, SmallVectorImpl<char> &Result) { 1411280031Sdim (void)ErasedOnReboot; 1412280031Sdim Result.clear(); 1413280031Sdim 1414296417Sdim // Check whether the temporary directory is specified by an environment var. 1415296417Sdim // This matches GetTempPath logic to some degree. GetTempPath is not used 1416296417Sdim // directly as it cannot handle evn var longer than 130 chars on Windows 7 1417296417Sdim // (fixed on Windows 8). 1418296417Sdim if (getTempDirEnvVar(Result)) { 1419296417Sdim assert(!Result.empty() && "Unexpected empty path"); 1420296417Sdim native(Result); // Some Unix-like shells use Unix path separator in $TMP. 1421296417Sdim fs::make_absolute(Result); // Make it absolute if not already. 1422280031Sdim return; 1423296417Sdim } 1424280031Sdim 1425280031Sdim // Fall back to a system default. 1426296417Sdim const char *DefaultResult = "C:\\Temp"; 1427280031Sdim Result.append(DefaultResult, DefaultResult + strlen(DefaultResult)); 1428280031Sdim} 1429276479Sdim} // end namespace path 1430276479Sdim 1431261991Sdimnamespace windows { 1432341825Sdimstd::error_code CodePageToUTF16(unsigned codepage, 1433341825Sdim llvm::StringRef original, 1434341825Sdim llvm::SmallVectorImpl<wchar_t> &utf16) { 1435341825Sdim if (!original.empty()) { 1436341825Sdim int len = ::MultiByteToWideChar(codepage, MB_ERR_INVALID_CHARS, original.begin(), 1437341825Sdim original.size(), utf16.begin(), 0); 1438261991Sdim 1439341825Sdim if (len == 0) { 1440288943Sdim return mapWindowsError(::GetLastError()); 1441341825Sdim } 1442261991Sdim 1443276479Sdim utf16.reserve(len + 1); 1444276479Sdim utf16.set_size(len); 1445261991Sdim 1446341825Sdim len = ::MultiByteToWideChar(codepage, MB_ERR_INVALID_CHARS, original.begin(), 1447341825Sdim original.size(), utf16.begin(), utf16.size()); 1448261991Sdim 1449341825Sdim if (len == 0) { 1450288943Sdim return mapWindowsError(::GetLastError()); 1451341825Sdim } 1452276479Sdim } 1453261991Sdim 1454261991Sdim // Make utf16 null terminated. 1455261991Sdim utf16.push_back(0); 1456261991Sdim utf16.pop_back(); 1457261991Sdim 1458276479Sdim return std::error_code(); 1459218885Sdim} 1460218885Sdim 1461341825Sdimstd::error_code UTF8ToUTF16(llvm::StringRef utf8, 1462341825Sdim llvm::SmallVectorImpl<wchar_t> &utf16) { 1463341825Sdim return CodePageToUTF16(CP_UTF8, utf8, utf16); 1464341825Sdim} 1465341825Sdim 1466341825Sdimstd::error_code CurCPToUTF16(llvm::StringRef curcp, 1467341825Sdim llvm::SmallVectorImpl<wchar_t> &utf16) { 1468341825Sdim return CodePageToUTF16(CP_ACP, curcp, utf16); 1469341825Sdim} 1470341825Sdim 1471280031Sdimstatic 1472280031Sdimstd::error_code UTF16ToCodePage(unsigned codepage, const wchar_t *utf16, 1473280031Sdim size_t utf16_len, 1474341825Sdim llvm::SmallVectorImpl<char> &converted) { 1475276479Sdim if (utf16_len) { 1476276479Sdim // Get length. 1477341825Sdim int len = ::WideCharToMultiByte(codepage, 0, utf16, utf16_len, converted.begin(), 1478276479Sdim 0, NULL, NULL); 1479261991Sdim 1480341825Sdim if (len == 0) { 1481288943Sdim return mapWindowsError(::GetLastError()); 1482341825Sdim } 1483261991Sdim 1484341825Sdim converted.reserve(len); 1485341825Sdim converted.set_size(len); 1486261991Sdim 1487276479Sdim // Now do the actual conversion. 1488341825Sdim len = ::WideCharToMultiByte(codepage, 0, utf16, utf16_len, converted.data(), 1489341825Sdim converted.size(), NULL, NULL); 1490261991Sdim 1491341825Sdim if (len == 0) { 1492288943Sdim return mapWindowsError(::GetLastError()); 1493341825Sdim } 1494276479Sdim } 1495261991Sdim 1496341825Sdim // Make the new string null terminated. 1497341825Sdim converted.push_back(0); 1498341825Sdim converted.pop_back(); 1499261991Sdim 1500276479Sdim return std::error_code(); 1501218885Sdim} 1502280031Sdim 1503280031Sdimstd::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len, 1504280031Sdim llvm::SmallVectorImpl<char> &utf8) { 1505280031Sdim return UTF16ToCodePage(CP_UTF8, utf16, utf16_len, utf8); 1506280031Sdim} 1507280031Sdim 1508280031Sdimstd::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len, 1509341825Sdim llvm::SmallVectorImpl<char> &curcp) { 1510341825Sdim return UTF16ToCodePage(CP_ACP, utf16, utf16_len, curcp); 1511280031Sdim} 1512309124Sdim 1513261991Sdim} // end namespace windows 1514261991Sdim} // end namespace sys 1515261991Sdim} // end namespace llvm 1516