-//===- llvm/Support/Win32/Path.cpp - Win32 Path Implementation ---*- C++ -*-===//
+//===- llvm/Support/Windows/Path.inc - Windows Path Impl --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
//
-// This file provides the Win32 specific implementation of the Path class.
+// This file implements the Windows specific implementation of the Path API.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
-//=== WARNING: Implementation here must contain only generic Win32 code that
-//=== is guaranteed to work on *all* Win32 variants.
+//=== WARNING: Implementation here must contain only generic Windows code that
+//=== is guaranteed to work on *all* Windows variants.
//===----------------------------------------------------------------------===//
-#include "Windows.h"
-#include <cstdio>
-#include <malloc.h>
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/WindowsError.h"
+#include <fcntl.h>
+#include <io.h>
+#include <sys/stat.h>
+#include <sys/types.h>
-// We need to undo a macro defined in Windows.h, otherwise we won't compile:
-#undef GetCurrentDirectory
+// These two headers must be included last, and make sure shlobj is required
+// after Windows.h to make sure it picks up our definition of _WIN32_WINNT
+#include "WindowsSupport.h"
+#include <shlobj.h>
-// Windows happily accepts either forward or backward slashes, though any path
-// returned by a Win32 API will have backward slashes. As LLVM code basically
-// assumes forward slashes are used, backward slashs are converted where they
-// can be introduced into a path.
-//
-// Another invariant is that a path ends with a slash if and only if the path
-// is a root directory. Any other use of a trailing slash is stripped. Unlike
-// in Unix, Windows has a rather complicated notion of a root path and this
-// invariant helps simply the code.
+#undef max
+
+// MinGW doesn't define this.
+#ifndef _ERRNO_T_DEFINED
+#define _ERRNO_T_DEFINED
+typedef int errno_t;
+#endif
+
+#ifdef _MSC_VER
+# pragma comment(lib, "advapi32.lib") // This provides CryptAcquireContextW.
+#endif
-static void FlipBackSlashes(std::string& s) {
- for (size_t i = 0; i < s.size(); i++)
- if (s[i] == '\\')
- s[i] = '/';
+using namespace llvm;
+
+using llvm::sys::windows::UTF8ToUTF16;
+using llvm::sys::windows::UTF16ToUTF8;
+using llvm::sys::path::widenPath;
+
+static bool is_separator(const wchar_t value) {
+ switch (value) {
+ case L'\\':
+ case L'/':
+ return true;
+ default:
+ return false;
+ }
}
namespace llvm {
-namespace sys {
+namespace sys {
+namespace path {
+
+// Convert a UTF-8 path to UTF-16. Also, if the absolute equivalent of the
+// path is longer than CreateDirectory can tolerate, make it absolute and
+// prefixed by '\\?\'.
+std::error_code widenPath(const Twine &Path8,
+ SmallVectorImpl<wchar_t> &Path16) {
+ const size_t MaxDirLen = MAX_PATH - 12; // Must leave room for 8.3 filename.
+
+ // Several operations would convert Path8 to SmallString; more efficient to
+ // do it once up front.
+ SmallString<128> Path8Str;
+ Path8.toVector(Path8Str);
+
+ // If we made this path absolute, how much longer would it get?
+ size_t CurPathLen;
+ if (llvm::sys::path::is_absolute(Twine(Path8Str)))
+ CurPathLen = 0; // No contribution from current_path needed.
+ else {
+ CurPathLen = ::GetCurrentDirectoryW(0, NULL);
+ if (CurPathLen == 0)
+ return mapWindowsError(::GetLastError());
+ }
-Path::Path(llvm::StringRef p)
- : path(p) {
- FlipBackSlashes(path);
-}
+ // Would the absolute path be longer than our limit?
+ if ((Path8Str.size() + CurPathLen) >= MaxDirLen &&
+ !Path8Str.startswith("\\\\?\\")) {
+ SmallString<2*MAX_PATH> FullPath("\\\\?\\");
+ if (CurPathLen) {
+ SmallString<80> CurPath;
+ if (std::error_code EC = llvm::sys::fs::current_path(CurPath))
+ return EC;
+ FullPath.append(CurPath);
+ }
+ // Traverse the requested path, canonicalizing . and .. as we go (because
+ // the \\?\ prefix is documented to treat them as real components).
+ // The iterators don't report separators and append() always attaches
+ // preferred_separator so we don't need to call native() on the result.
+ for (llvm::sys::path::const_iterator I = llvm::sys::path::begin(Path8Str),
+ E = llvm::sys::path::end(Path8Str);
+ I != E; ++I) {
+ if (I->size() == 1 && *I == ".")
+ continue;
+ if (I->size() == 2 && *I == "..")
+ llvm::sys::path::remove_filename(FullPath);
+ else
+ llvm::sys::path::append(FullPath, *I);
+ }
+ return UTF8ToUTF16(FullPath, Path16);
+ }
-Path::Path(const char *StrStart, unsigned StrLen)
- : path(StrStart, StrLen) {
- FlipBackSlashes(path);
+ // Just use the caller's original path.
+ return UTF8ToUTF16(Path8Str, Path16);
}
+} // end namespace path
-Path&
-Path::operator=(StringRef that) {
- path.assign(that.data(), that.size());
- FlipBackSlashes(path);
- return *this;
-}
+namespace fs {
-bool
-Path::isValid() const {
- if (path.empty())
- return false;
+std::string getMainExecutable(const char *argv0, void *MainExecAddr) {
+ SmallVector<wchar_t, MAX_PATH> PathName;
+ DWORD Size = ::GetModuleFileNameW(NULL, PathName.data(), PathName.capacity());
- size_t len = path.size();
- // If there is a null character, it and all its successors are ignored.
- size_t pos = path.find_first_of('\0');
- if (pos != std::string::npos)
- len = pos;
-
- // If there is a colon, it must be the second character, preceded by a letter
- // and followed by something.
- pos = path.rfind(':',len);
- size_t rootslash = 0;
- if (pos != std::string::npos) {
- if (pos != 1 || !isalpha(static_cast<unsigned char>(path[0])) || len < 3)
- return false;
- rootslash = 2;
- }
+ // A zero return value indicates a failure other than insufficient space.
+ if (Size == 0)
+ return "";
- // Look for a UNC path, and if found adjust our notion of the root slash.
- if (len > 3 && path[0] == '/' && path[1] == '/') {
- rootslash = path.find('/', 2);
- if (rootslash == std::string::npos)
- rootslash = 0;
- }
+ // Insufficient space is determined by a return value equal to the size of
+ // the buffer passed in.
+ if (Size == PathName.capacity())
+ return "";
- // Check for illegal characters.
- if (path.find_first_of("\\<>\"|\001\002\003\004\005\006\007\010\011\012"
- "\013\014\015\016\017\020\021\022\023\024\025\026"
- "\027\030\031\032\033\034\035\036\037")
- != std::string::npos)
- return false;
+ // On success, GetModuleFileNameW returns the number of characters written to
+ // the buffer not including the NULL terminator.
+ PathName.set_size(Size);
- // Remove trailing slash, unless it's a root slash.
- if (len > rootslash+1 && path[len-1] == '/')
- path.erase(--len);
+ // Convert the result from UTF-16 to UTF-8.
+ SmallVector<char, MAX_PATH> PathNameUTF8;
+ if (UTF16ToUTF8(PathName.data(), PathName.size(), PathNameUTF8))
+ return "";
- // Check each component for legality.
- for (pos = 0; pos < len; ++pos) {
- // A component may not end in a space.
- if (path[pos] == ' ') {
- if (pos+1 == len || path[pos+1] == '/' || path[pos+1] == '\0')
- return false;
- }
+ return std::string(PathNameUTF8.data());
+}
- // A component may not end in a period.
- if (path[pos] == '.') {
- if (pos+1 == len || path[pos+1] == '/') {
- // Unless it is the pseudo-directory "."...
- if (pos == 0 || path[pos-1] == '/' || path[pos-1] == ':')
- return true;
- // or "..".
- if (pos > 0 && path[pos-1] == '.') {
- if (pos == 1 || path[pos-2] == '/' || path[pos-2] == ':')
- return true;
- }
- return false;
- }
- }
- }
+UniqueID file_status::getUniqueID() const {
+ // The file is uniquely identified by the volume serial number along
+ // with the 64-bit file identifier.
+ uint64_t FileID = (static_cast<uint64_t>(FileIndexHigh) << 32ULL) |
+ static_cast<uint64_t>(FileIndexLow);
- return true;
+ return UniqueID(VolumeSerialNumber, FileID);
}
-void Path::makeAbsolute() {
- TCHAR FullPath[MAX_PATH + 1] = {0};
- LPTSTR FilePart = NULL;
+TimeValue file_status::getLastModificationTime() const {
+ ULARGE_INTEGER UI;
+ UI.LowPart = LastWriteTimeLow;
+ UI.HighPart = LastWriteTimeHigh;
- DWORD RetLength = ::GetFullPathNameA(path.c_str(),
- sizeof(FullPath)/sizeof(FullPath[0]),
- FullPath, &FilePart);
+ TimeValue Ret;
+ Ret.fromWin32Time(UI.QuadPart);
+ return Ret;
+}
- if (0 == RetLength) {
- // FIXME: Report the error GetLastError()
- assert(0 && "Unable to make absolute path!");
- } else if (RetLength > MAX_PATH) {
- // FIXME: Report too small buffer (needed RetLength bytes).
- assert(0 && "Unable to make absolute path!");
- } else {
- path = FullPath;
- }
+std::error_code current_path(SmallVectorImpl<char> &result) {
+ SmallVector<wchar_t, MAX_PATH> cur_path;
+ DWORD len = MAX_PATH;
+
+ do {
+ cur_path.reserve(len);
+ len = ::GetCurrentDirectoryW(cur_path.capacity(), cur_path.data());
+
+ // A zero return value indicates a failure other than insufficient space.
+ if (len == 0)
+ return mapWindowsError(::GetLastError());
+
+ // If there's insufficient space, the len returned is larger than the len
+ // given.
+ } while (len > cur_path.capacity());
+
+ // On success, GetCurrentDirectoryW returns the number of characters not
+ // including the null-terminator.
+ cur_path.set_size(len);
+ return UTF16ToUTF8(cur_path.begin(), cur_path.size(), result);
}
-static Path *TempDirectory;
+std::error_code create_directory(const Twine &path, bool IgnoreExisting,
+ perms Perms) {
+ SmallVector<wchar_t, 128> path_utf16;
-Path
-Path::GetTemporaryDirectory(std::string* ErrMsg) {
- if (TempDirectory) {
-#if defined(_MSC_VER)
- // Visual Studio gets confused and emits a diagnostic about calling exists,
- // even though this is the implementation for PathV1. Temporarily
- // disable the deprecated warning message
- #pragma warning(push)
- #pragma warning(disable:4996)
-#endif
- assert(TempDirectory->exists() && "Who has removed TempDirectory?");
-#if defined(_MSC_VER)
- #pragma warning(pop)
-#endif
- return *TempDirectory;
- }
+ if (std::error_code ec = widenPath(path, path_utf16))
+ return ec;
- char pathname[MAX_PATH];
- if (!GetTempPath(MAX_PATH, pathname)) {
- if (ErrMsg)
- *ErrMsg = "Can't determine temporary directory";
- return Path();
+ if (!::CreateDirectoryW(path_utf16.begin(), NULL)) {
+ DWORD LastError = ::GetLastError();
+ if (LastError != ERROR_ALREADY_EXISTS || !IgnoreExisting)
+ return mapWindowsError(LastError);
}
- Path result;
- result.set(pathname);
+ return std::error_code();
+}
- // Append a subdirectory based on our process id so multiple LLVMs don't
- // step on each other's toes.
-#ifdef __MINGW32__
- // Mingw's Win32 header files are broken.
- sprintf(pathname, "LLVM_%u", unsigned(GetCurrentProcessId()));
-#else
- sprintf(pathname, "LLVM_%u", GetCurrentProcessId());
-#endif
- result.appendComponent(pathname);
+// We can't use symbolic links for windows.
+std::error_code create_link(const Twine &to, const Twine &from) {
+ // Convert to utf-16.
+ SmallVector<wchar_t, 128> wide_from;
+ SmallVector<wchar_t, 128> wide_to;
+ if (std::error_code ec = widenPath(from, wide_from))
+ return ec;
+ if (std::error_code ec = widenPath(to, wide_to))
+ return ec;
- // If there's a directory left over from a previous LLVM execution that
- // happened to have the same process id, get rid of it.
- result.eraseFromDisk(true);
+ if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL))
+ return mapWindowsError(::GetLastError());
- // And finally (re-)create the empty directory.
- result.createDirectoryOnDisk(false);
- TempDirectory = new Path(result);
- return *TempDirectory;
+ return std::error_code();
}
-Path
-Path::GetCurrentDirectory() {
- char pathname[MAX_PATH];
- ::GetCurrentDirectoryA(MAX_PATH,pathname);
- return Path(pathname);
+std::error_code remove(const Twine &path, bool IgnoreNonExisting) {
+ SmallVector<wchar_t, 128> path_utf16;
+
+ file_status ST;
+ if (std::error_code EC = status(path, ST)) {
+ if (EC != errc::no_such_file_or_directory || !IgnoreNonExisting)
+ return EC;
+ return std::error_code();
+ }
+
+ if (std::error_code ec = widenPath(path, path_utf16))
+ return ec;
+
+ if (ST.type() == file_type::directory_file) {
+ if (!::RemoveDirectoryW(c_str(path_utf16))) {
+ std::error_code EC = mapWindowsError(::GetLastError());
+ if (EC != errc::no_such_file_or_directory || !IgnoreNonExisting)
+ return EC;
+ }
+ return std::error_code();
+ }
+ if (!::DeleteFileW(c_str(path_utf16))) {
+ std::error_code EC = mapWindowsError(::GetLastError());
+ if (EC != errc::no_such_file_or_directory || !IgnoreNonExisting)
+ return EC;
+ }
+ return std::error_code();
}
-// FIXME: the above set of functions don't map to Windows very well.
+std::error_code rename(const Twine &from, const Twine &to) {
+ // Convert to utf-16.
+ SmallVector<wchar_t, 128> wide_from;
+ SmallVector<wchar_t, 128> wide_to;
+ if (std::error_code ec = widenPath(from, wide_from))
+ return ec;
+ if (std::error_code ec = widenPath(to, wide_to))
+ return ec;
+
+ std::error_code ec = std::error_code();
+
+ // Retry while we see ERROR_ACCESS_DENIED.
+ // System scanners (eg. indexer) might open the source file when it is written
+ // and closed.
+
+ for (int i = 0; i < 2000; i++) {
+ // Try ReplaceFile first, as it is able to associate a new data stream with
+ // the destination even if the destination file is currently open.
+ if (::ReplaceFileW(wide_to.begin(), wide_from.begin(), NULL, 0, NULL, NULL))
+ return std::error_code();
+
+ // We get ERROR_FILE_NOT_FOUND if the destination file is missing.
+ // MoveFileEx can handle this case.
+ DWORD ReplaceError = ::GetLastError();
+ ec = mapWindowsError(ReplaceError);
+ if (ReplaceError != ERROR_ACCESS_DENIED &&
+ ReplaceError != ERROR_FILE_NOT_FOUND &&
+ ReplaceError != ERROR_SHARING_VIOLATION)
+ break;
+
+ if (::MoveFileExW(wide_from.begin(), wide_to.begin(),
+ MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
+ return std::error_code();
+
+ DWORD MoveError = ::GetLastError();
+ ec = mapWindowsError(MoveError);
+ if (MoveError != ERROR_ACCESS_DENIED) break;
+
+ ::Sleep(1);
+ }
-bool
-Path::exists() const {
- DWORD attr = GetFileAttributes(path.c_str());
- return attr != INVALID_FILE_ATTRIBUTES;
+ return ec;
}
-bool
-Path::isDirectory() const {
- DWORD attr = GetFileAttributes(path.c_str());
- return (attr != INVALID_FILE_ATTRIBUTES) &&
- (attr & FILE_ATTRIBUTE_DIRECTORY);
+std::error_code resize_file(int FD, uint64_t Size) {
+#ifdef HAVE__CHSIZE_S
+ errno_t error = ::_chsize_s(FD, Size);
+#else
+ errno_t error = ::_chsize(FD, Size);
+#endif
+ return std::error_code(error, std::generic_category());
}
-bool
-Path::isSymLink() const {
- DWORD attributes = GetFileAttributes(path.c_str());
+std::error_code access(const Twine &Path, AccessMode Mode) {
+ SmallVector<wchar_t, 128> PathUtf16;
+
+ if (std::error_code EC = widenPath(Path, PathUtf16))
+ return EC;
- if (attributes == INVALID_FILE_ATTRIBUTES)
- // There's no sane way to report this :(.
- assert(0 && "GetFileAttributes returned INVALID_FILE_ATTRIBUTES");
+ DWORD Attributes = ::GetFileAttributesW(PathUtf16.begin());
- // This isn't exactly what defines a NTFS symlink, but it is only true for
- // paths that act like a symlink.
- return attributes & FILE_ATTRIBUTE_REPARSE_POINT;
+ if (Attributes == INVALID_FILE_ATTRIBUTES) {
+ // See if the file didn't actually exist.
+ DWORD LastError = ::GetLastError();
+ if (LastError != ERROR_FILE_NOT_FOUND &&
+ LastError != ERROR_PATH_NOT_FOUND)
+ return mapWindowsError(LastError);
+ return errc::no_such_file_or_directory;
+ }
+
+ if (Mode == AccessMode::Write && (Attributes & FILE_ATTRIBUTE_READONLY))
+ return errc::permission_denied;
+
+ return std::error_code();
}
-bool
-Path::isRegularFile() const {
- bool res;
- if (fs::is_regular_file(path, res))
- return false;
- return res;
+bool can_execute(const Twine &Path) {
+ return !access(Path, AccessMode::Execute) ||
+ !access(Path + ".exe", AccessMode::Execute);
}
-bool Path::makeReadableOnDisk(std::string* ErrMsg) {
- // All files are readable on Windows (ignoring security attributes).
- return false;
+bool equivalent(file_status A, file_status B) {
+ assert(status_known(A) && status_known(B));
+ return A.FileIndexHigh == B.FileIndexHigh &&
+ A.FileIndexLow == B.FileIndexLow &&
+ A.FileSizeHigh == B.FileSizeHigh &&
+ A.FileSizeLow == B.FileSizeLow &&
+ A.LastWriteTimeHigh == B.LastWriteTimeHigh &&
+ A.LastWriteTimeLow == B.LastWriteTimeLow &&
+ A.VolumeSerialNumber == B.VolumeSerialNumber;
}
-bool Path::makeWriteableOnDisk(std::string* ErrMsg) {
- DWORD attr = GetFileAttributes(path.c_str());
+std::error_code equivalent(const Twine &A, const Twine &B, bool &result) {
+ file_status fsA, fsB;
+ if (std::error_code ec = status(A, fsA))
+ return ec;
+ if (std::error_code ec = status(B, fsB))
+ return ec;
+ result = equivalent(fsA, fsB);
+ return std::error_code();
+}
- // If it doesn't exist, we're done.
- if (attr == INVALID_FILE_ATTRIBUTES)
- return false;
+static bool isReservedName(StringRef path) {
+ // This list of reserved names comes from MSDN, at:
+ // http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx
+ static const char *const sReservedNames[] = { "nul", "con", "prn", "aux",
+ "com1", "com2", "com3", "com4",
+ "com5", "com6", "com7", "com8",
+ "com9", "lpt1", "lpt2", "lpt3",
+ "lpt4", "lpt5", "lpt6", "lpt7",
+ "lpt8", "lpt9" };
+
+ // First, check to see if this is a device namespace, which always
+ // starts with \\.\, since device namespaces are not legal file paths.
+ if (path.startswith("\\\\.\\"))
+ return true;
- if (attr & FILE_ATTRIBUTE_READONLY) {
- if (!SetFileAttributes(path.c_str(), attr & ~FILE_ATTRIBUTE_READONLY)) {
- MakeErrMsg(ErrMsg, std::string(path) + ": Can't make file writable: ");
+ // Then compare against the list of ancient reserved names
+ for (size_t i = 0; i < array_lengthof(sReservedNames); ++i) {
+ if (path.equals_lower(sReservedNames[i]))
return true;
- }
}
+
+ // The path isn't what we consider reserved.
return false;
}
-bool
-Path::set(StringRef a_path) {
- if (a_path.empty())
- return false;
- std::string save(path);
- path = a_path;
- FlipBackSlashes(path);
- if (!isValid()) {
- path = save;
- return false;
+static std::error_code getStatus(HANDLE FileHandle, file_status &Result) {
+ if (FileHandle == INVALID_HANDLE_VALUE)
+ goto handle_status_error;
+
+ switch (::GetFileType(FileHandle)) {
+ default:
+ llvm_unreachable("Don't know anything about this file type");
+ case FILE_TYPE_UNKNOWN: {
+ DWORD Err = ::GetLastError();
+ if (Err != NO_ERROR)
+ return mapWindowsError(Err);
+ Result = file_status(file_type::type_unknown);
+ return std::error_code();
+ }
+ case FILE_TYPE_DISK:
+ break;
+ case FILE_TYPE_CHAR:
+ Result = file_status(file_type::character_file);
+ return std::error_code();
+ case FILE_TYPE_PIPE:
+ Result = file_status(file_type::fifo_file);
+ return std::error_code();
+ }
+
+ BY_HANDLE_FILE_INFORMATION Info;
+ if (!::GetFileInformationByHandle(FileHandle, &Info))
+ goto handle_status_error;
+
+ {
+ file_type Type = (Info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+ ? file_type::directory_file
+ : file_type::regular_file;
+ Result =
+ file_status(Type, Info.ftLastWriteTime.dwHighDateTime,
+ Info.ftLastWriteTime.dwLowDateTime,
+ Info.dwVolumeSerialNumber, Info.nFileSizeHigh,
+ Info.nFileSizeLow, Info.nFileIndexHigh, Info.nFileIndexLow);
+ return std::error_code();
}
- return true;
+
+handle_status_error:
+ DWORD LastError = ::GetLastError();
+ if (LastError == ERROR_FILE_NOT_FOUND ||
+ LastError == ERROR_PATH_NOT_FOUND)
+ Result = file_status(file_type::file_not_found);
+ else if (LastError == ERROR_SHARING_VIOLATION)
+ Result = file_status(file_type::type_unknown);
+ else
+ Result = file_status(file_type::status_error);
+ return mapWindowsError(LastError);
}
-bool
-Path::appendComponent(StringRef name) {
- if (name.empty())
- return false;
- std::string save(path);
- if (!path.empty()) {
- size_t last = path.size() - 1;
- if (path[last] != '/')
- path += '/';
+std::error_code status(const Twine &path, file_status &result) {
+ SmallString<128> path_storage;
+ SmallVector<wchar_t, 128> path_utf16;
+
+ StringRef path8 = path.toStringRef(path_storage);
+ if (isReservedName(path8)) {
+ result = file_status(file_type::character_file);
+ return std::error_code();
}
- path += name;
- if (!isValid()) {
- path = save;
- return false;
+
+ if (std::error_code ec = widenPath(path8, path_utf16))
+ return ec;
+
+ DWORD attr = ::GetFileAttributesW(path_utf16.begin());
+ if (attr == INVALID_FILE_ATTRIBUTES)
+ return getStatus(INVALID_HANDLE_VALUE, result);
+
+ // Handle reparse points.
+ if (attr & FILE_ATTRIBUTE_REPARSE_POINT) {
+ ScopedFileHandle h(
+ ::CreateFileW(path_utf16.begin(),
+ 0, // Attributes only.
+ FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
+ NULL,
+ OPEN_EXISTING,
+ FILE_FLAG_BACKUP_SEMANTICS,
+ 0));
+ if (!h)
+ return getStatus(INVALID_HANDLE_VALUE, result);
}
- return true;
+
+ ScopedFileHandle h(
+ ::CreateFileW(path_utf16.begin(), 0, // Attributes only.
+ FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
+ NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0));
+ if (!h)
+ return getStatus(INVALID_HANDLE_VALUE, result);
+
+ return getStatus(h, result);
}
-bool
-Path::eraseComponent() {
- size_t slashpos = path.rfind('/',path.size());
- if (slashpos == path.size() - 1 || slashpos == std::string::npos)
- return false;
- std::string save(path);
- path.erase(slashpos);
- if (!isValid()) {
- path = save;
- return false;
+std::error_code status(int FD, file_status &Result) {
+ HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
+ return getStatus(FileHandle, Result);
+}
+
+std::error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
+ ULARGE_INTEGER UI;
+ UI.QuadPart = Time.toWin32Time();
+ FILETIME FT;
+ FT.dwLowDateTime = UI.LowPart;
+ FT.dwHighDateTime = UI.HighPart;
+ HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
+ if (!SetFileTime(FileHandle, NULL, &FT, &FT))
+ return mapWindowsError(::GetLastError());
+ return std::error_code();
+}
+
+std::error_code mapped_file_region::init(int FD, uint64_t Offset,
+ mapmode Mode) {
+ // Make sure that the requested size fits within SIZE_T.
+ if (Size > std::numeric_limits<SIZE_T>::max())
+ return make_error_code(errc::invalid_argument);
+
+ HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
+ if (FileHandle == INVALID_HANDLE_VALUE)
+ return make_error_code(errc::bad_file_descriptor);
+
+ DWORD flprotect;
+ switch (Mode) {
+ case readonly: flprotect = PAGE_READONLY; break;
+ case readwrite: flprotect = PAGE_READWRITE; break;
+ case priv: flprotect = PAGE_WRITECOPY; break;
}
- return true;
-}
-
-bool
-Path::eraseSuffix() {
- size_t dotpos = path.rfind('.',path.size());
- size_t slashpos = path.rfind('/',path.size());
- if (dotpos != std::string::npos) {
- if (slashpos == std::string::npos || dotpos > slashpos+1) {
- std::string save(path);
- path.erase(dotpos, path.size()-dotpos);
- if (!isValid()) {
- path = save;
- return false;
- }
- return true;
+
+ HANDLE FileMappingHandle =
+ ::CreateFileMappingW(FileHandle, 0, flprotect,
+ (Offset + Size) >> 32,
+ (Offset + Size) & 0xffffffff,
+ 0);
+ if (FileMappingHandle == NULL) {
+ std::error_code ec = mapWindowsError(GetLastError());
+ return ec;
+ }
+
+ DWORD dwDesiredAccess;
+ switch (Mode) {
+ case readonly: dwDesiredAccess = FILE_MAP_READ; break;
+ case readwrite: dwDesiredAccess = FILE_MAP_WRITE; break;
+ case priv: dwDesiredAccess = FILE_MAP_COPY; break;
+ }
+ Mapping = ::MapViewOfFile(FileMappingHandle,
+ dwDesiredAccess,
+ Offset >> 32,
+ Offset & 0xffffffff,
+ Size);
+ if (Mapping == NULL) {
+ std::error_code ec = mapWindowsError(GetLastError());
+ ::CloseHandle(FileMappingHandle);
+ return ec;
+ }
+
+ if (Size == 0) {
+ MEMORY_BASIC_INFORMATION mbi;
+ SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi));
+ if (Result == 0) {
+ std::error_code ec = mapWindowsError(GetLastError());
+ ::UnmapViewOfFile(Mapping);
+ ::CloseHandle(FileMappingHandle);
+ return ec;
}
+ Size = mbi.RegionSize;
}
- return false;
+
+ // Close all the handles except for the view. It will keep the other handles
+ // alive.
+ ::CloseHandle(FileMappingHandle);
+ return std::error_code();
}
-inline bool PathMsg(std::string* ErrMsg, const char* pathname, const char*msg) {
- if (ErrMsg)
- *ErrMsg = std::string(pathname) + ": " + std::string(msg);
- return true;
+mapped_file_region::mapped_file_region(int fd, mapmode mode, uint64_t length,
+ uint64_t offset, std::error_code &ec)
+ : Size(length), Mapping() {
+ ec = init(fd, offset, mode);
+ if (ec)
+ Mapping = 0;
}
-bool
-Path::createDirectoryOnDisk(bool create_parents, std::string* ErrMsg) {
- // Get a writeable copy of the path name
- size_t len = path.length();
- char *pathname = reinterpret_cast<char *>(_alloca(len+2));
- path.copy(pathname, len);
- pathname[len] = 0;
+mapped_file_region::~mapped_file_region() {
+ if (Mapping)
+ ::UnmapViewOfFile(Mapping);
+}
- // Make sure it ends with a slash.
- if (len == 0 || pathname[len - 1] != '/') {
- pathname[len] = '/';
- pathname[++len] = 0;
- }
+uint64_t mapped_file_region::size() const {
+ assert(Mapping && "Mapping failed but used anyway!");
+ return Size;
+}
+
+char *mapped_file_region::data() const {
+ assert(Mapping && "Mapping failed but used anyway!");
+ return reinterpret_cast<char*>(Mapping);
+}
- // Determine starting point for initial / search.
- char *next = pathname;
- if (pathname[0] == '/' && pathname[1] == '/') {
- // Skip host name.
- next = strchr(pathname+2, '/');
- if (next == NULL)
- return PathMsg(ErrMsg, pathname, "badly formed remote directory");
+const char *mapped_file_region::const_data() const {
+ assert(Mapping && "Mapping failed but used anyway!");
+ return reinterpret_cast<const char*>(Mapping);
+}
- // Skip share name.
- next = strchr(next+1, '/');
- if (next == NULL)
- return PathMsg(ErrMsg, pathname,"badly formed remote directory");
+int mapped_file_region::alignment() {
+ SYSTEM_INFO SysInfo;
+ ::GetSystemInfo(&SysInfo);
+ return SysInfo.dwAllocationGranularity;
+}
- next++;
- if (*next == 0)
- return PathMsg(ErrMsg, pathname, "badly formed remote directory");
+std::error_code detail::directory_iterator_construct(detail::DirIterState &it,
+ StringRef path){
+ SmallVector<wchar_t, 128> path_utf16;
- } else {
- if (pathname[1] == ':')
- next += 2; // skip drive letter
- if (*next == '/')
- next++; // skip root directory
- }
+ if (std::error_code ec = widenPath(path, path_utf16))
+ return ec;
- // If we're supposed to create intermediate directories
- if (create_parents) {
- // Loop through the directory components until we're done
- while (*next) {
- next = strchr(next, '/');
- *next = 0;
- if (!CreateDirectory(pathname, NULL) &&
- GetLastError() != ERROR_ALREADY_EXISTS)
- return MakeErrMsg(ErrMsg,
- std::string(pathname) + ": Can't create directory: ");
- *next++ = '/';
- }
+ // Convert path to the format that Windows is happy with.
+ if (path_utf16.size() > 0 &&
+ !is_separator(path_utf16[path.size() - 1]) &&
+ path_utf16[path.size() - 1] != L':') {
+ path_utf16.push_back(L'\\');
+ path_utf16.push_back(L'*');
} else {
- // Drop trailing slash.
- pathname[len-1] = 0;
- if (!CreateDirectory(pathname, NULL) &&
- GetLastError() != ERROR_ALREADY_EXISTS) {
- return MakeErrMsg(ErrMsg, std::string(pathname) +
- ": Can't create directory: ");
- }
+ path_utf16.push_back(L'*');
}
- return false;
+
+ // Get the first directory entry.
+ WIN32_FIND_DATAW FirstFind;
+ ScopedFindHandle FindHandle(::FindFirstFileW(c_str(path_utf16), &FirstFind));
+ if (!FindHandle)
+ return mapWindowsError(::GetLastError());
+
+ size_t FilenameLen = ::wcslen(FirstFind.cFileName);
+ while ((FilenameLen == 1 && FirstFind.cFileName[0] == L'.') ||
+ (FilenameLen == 2 && FirstFind.cFileName[0] == L'.' &&
+ FirstFind.cFileName[1] == L'.'))
+ if (!::FindNextFileW(FindHandle, &FirstFind)) {
+ DWORD LastError = ::GetLastError();
+ // Check for end.
+ if (LastError == ERROR_NO_MORE_FILES)
+ return detail::directory_iterator_destruct(it);
+ return mapWindowsError(LastError);
+ } else
+ FilenameLen = ::wcslen(FirstFind.cFileName);
+
+ // Construct the current directory entry.
+ SmallString<128> directory_entry_name_utf8;
+ if (std::error_code ec =
+ UTF16ToUTF8(FirstFind.cFileName, ::wcslen(FirstFind.cFileName),
+ directory_entry_name_utf8))
+ return ec;
+
+ it.IterationHandle = intptr_t(FindHandle.take());
+ SmallString<128> directory_entry_path(path);
+ path::append(directory_entry_path, directory_entry_name_utf8);
+ it.CurrentEntry = directory_entry(directory_entry_path);
+
+ return std::error_code();
}
-bool
-Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const {
- WIN32_FILE_ATTRIBUTE_DATA fi;
- if (!GetFileAttributesEx(path.c_str(), GetFileExInfoStandard, &fi))
- return true;
+std::error_code detail::directory_iterator_destruct(detail::DirIterState &it) {
+ if (it.IterationHandle != 0)
+ // Closes the handle if it's valid.
+ ScopedFindHandle close(HANDLE(it.IterationHandle));
+ it.IterationHandle = 0;
+ it.CurrentEntry = directory_entry();
+ return std::error_code();
+}
- if (fi.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
- // If it doesn't exist, we're done.
- bool Exists;
- if (fs::exists(path, Exists) || !Exists)
- return false;
+std::error_code detail::directory_iterator_increment(detail::DirIterState &it) {
+ WIN32_FIND_DATAW FindData;
+ if (!::FindNextFileW(HANDLE(it.IterationHandle), &FindData)) {
+ DWORD LastError = ::GetLastError();
+ // Check for end.
+ if (LastError == ERROR_NO_MORE_FILES)
+ return detail::directory_iterator_destruct(it);
+ return mapWindowsError(LastError);
+ }
- char *pathname = reinterpret_cast<char *>(_alloca(path.length()+3));
- int lastchar = path.length() - 1 ;
- path.copy(pathname, lastchar+1);
-
- // Make path end with '/*'.
- if (pathname[lastchar] != '/')
- pathname[++lastchar] = '/';
- pathname[lastchar+1] = '*';
- pathname[lastchar+2] = 0;
-
- if (remove_contents) {
- WIN32_FIND_DATA fd;
- HANDLE h = FindFirstFile(pathname, &fd);
-
- // It's a bad idea to alter the contents of a directory while enumerating
- // its contents. So build a list of its contents first, then destroy them.
-
- if (h != INVALID_HANDLE_VALUE) {
- std::vector<Path> list;
-
- do {
- if (strcmp(fd.cFileName, ".") == 0)
- continue;
- if (strcmp(fd.cFileName, "..") == 0)
- continue;
-
- Path aPath(path);
- aPath.appendComponent(&fd.cFileName[0]);
- list.push_back(aPath);
- } while (FindNextFile(h, &fd));
-
- DWORD err = GetLastError();
- FindClose(h);
- if (err != ERROR_NO_MORE_FILES) {
- SetLastError(err);
- return MakeErrMsg(ErrStr, path + ": Can't read directory: ");
- }
-
- for (std::vector<Path>::iterator I = list.begin(); I != list.end();
- ++I) {
- Path &aPath = *I;
- aPath.eraseFromDisk(true);
- }
- } else {
- if (GetLastError() != ERROR_FILE_NOT_FOUND)
- return MakeErrMsg(ErrStr, path + ": Can't read directory: ");
- }
- }
+ size_t FilenameLen = ::wcslen(FindData.cFileName);
+ if ((FilenameLen == 1 && FindData.cFileName[0] == L'.') ||
+ (FilenameLen == 2 && FindData.cFileName[0] == L'.' &&
+ FindData.cFileName[1] == L'.'))
+ return directory_iterator_increment(it);
- pathname[lastchar] = 0;
- if (!RemoveDirectory(pathname))
- return MakeErrMsg(ErrStr,
- std::string(pathname) + ": Can't destroy directory: ");
- return false;
- } else {
- // Read-only files cannot be deleted on Windows. Must remove the read-only
- // attribute first.
- if (fi.dwFileAttributes & FILE_ATTRIBUTE_READONLY) {
- if (!SetFileAttributes(path.c_str(),
- fi.dwFileAttributes & ~FILE_ATTRIBUTE_READONLY))
- return MakeErrMsg(ErrStr, path + ": Can't destroy file: ");
- }
+ SmallString<128> directory_entry_path_utf8;
+ if (std::error_code ec =
+ UTF16ToUTF8(FindData.cFileName, ::wcslen(FindData.cFileName),
+ directory_entry_path_utf8))
+ return ec;
- if (!DeleteFile(path.c_str()))
- return MakeErrMsg(ErrStr, path + ": Can't destroy file: ");
- return false;
- }
+ it.CurrentEntry.replace_filename(Twine(directory_entry_path_utf8));
+ return std::error_code();
}
-bool
-Path::renamePathOnDisk(const Path& newName, std::string* ErrMsg) {
- if (!MoveFileEx(path.c_str(), newName.c_str(), MOVEFILE_REPLACE_EXISTING))
- return MakeErrMsg(ErrMsg, "Can't move '" + path + "' to '" + newName.path
- + "': ");
- return false;
+std::error_code openFileForRead(const Twine &Name, int &ResultFD) {
+ SmallVector<wchar_t, 128> PathUTF16;
+
+ if (std::error_code EC = widenPath(Name, PathUTF16))
+ return EC;
+
+ HANDLE H =
+ ::CreateFileW(PathUTF16.begin(), GENERIC_READ,
+ FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+ NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+ if (H == INVALID_HANDLE_VALUE) {
+ DWORD LastError = ::GetLastError();
+ std::error_code EC = mapWindowsError(LastError);
+ // Provide a better error message when trying to open directories.
+ // This only runs if we failed to open the file, so there is probably
+ // no performances issues.
+ if (LastError != ERROR_ACCESS_DENIED)
+ return EC;
+ if (is_directory(Name))
+ return make_error_code(errc::is_a_directory);
+ return EC;
+ }
+
+ int FD = ::_open_osfhandle(intptr_t(H), 0);
+ if (FD == -1) {
+ ::CloseHandle(H);
+ return mapWindowsError(ERROR_INVALID_HANDLE);
+ }
+
+ ResultFD = FD;
+ return std::error_code();
}
-bool
-Path::setStatusInfoOnDisk(const FileStatus &si, std::string *ErrMsg) const {
- // FIXME: should work on directories also.
- if (!si.isFile) {
- return true;
+std::error_code openFileForWrite(const Twine &Name, int &ResultFD,
+ sys::fs::OpenFlags Flags, unsigned Mode) {
+ // Verify that we don't have both "append" and "excl".
+ assert((!(Flags & sys::fs::F_Excl) || !(Flags & sys::fs::F_Append)) &&
+ "Cannot specify both 'excl' and 'append' file creation flags!");
+
+ SmallVector<wchar_t, 128> PathUTF16;
+
+ if (std::error_code EC = widenPath(Name, PathUTF16))
+ return EC;
+
+ DWORD CreationDisposition;
+ if (Flags & F_Excl)
+ CreationDisposition = CREATE_NEW;
+ else if (Flags & F_Append)
+ CreationDisposition = OPEN_ALWAYS;
+ else
+ CreationDisposition = CREATE_ALWAYS;
+
+ DWORD Access = GENERIC_WRITE;
+ if (Flags & F_RW)
+ Access |= GENERIC_READ;
+
+ HANDLE H = ::CreateFileW(PathUTF16.begin(), Access,
+ FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
+ CreationDisposition, FILE_ATTRIBUTE_NORMAL, NULL);
+
+ if (H == INVALID_HANDLE_VALUE) {
+ DWORD LastError = ::GetLastError();
+ std::error_code EC = mapWindowsError(LastError);
+ // Provide a better error message when trying to open directories.
+ // This only runs if we failed to open the file, so there is probably
+ // no performances issues.
+ if (LastError != ERROR_ACCESS_DENIED)
+ return EC;
+ if (is_directory(Name))
+ return make_error_code(errc::is_a_directory);
+ return EC;
}
- HANDLE h = CreateFile(path.c_str(),
- FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES,
- FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
- NULL,
- OPEN_EXISTING,
- FILE_ATTRIBUTE_NORMAL,
- NULL);
- if (h == INVALID_HANDLE_VALUE)
- return true;
+ int OpenFlags = 0;
+ if (Flags & F_Append)
+ OpenFlags |= _O_APPEND;
- BY_HANDLE_FILE_INFORMATION bhfi;
- if (!GetFileInformationByHandle(h, &bhfi)) {
- DWORD err = GetLastError();
- CloseHandle(h);
- SetLastError(err);
- return MakeErrMsg(ErrMsg, path + ": GetFileInformationByHandle: ");
+ if (Flags & F_Text)
+ OpenFlags |= _O_TEXT;
+
+ int FD = ::_open_osfhandle(intptr_t(H), OpenFlags);
+ if (FD == -1) {
+ ::CloseHandle(H);
+ return mapWindowsError(ERROR_INVALID_HANDLE);
}
- ULARGE_INTEGER ui;
- ui.QuadPart = si.modTime.toWin32Time();
- FILETIME ft;
- ft.dwLowDateTime = ui.LowPart;
- ft.dwHighDateTime = ui.HighPart;
- BOOL ret = SetFileTime(h, NULL, &ft, &ft);
- DWORD err = GetLastError();
- CloseHandle(h);
- if (!ret) {
- SetLastError(err);
- return MakeErrMsg(ErrMsg, path + ": SetFileTime: ");
+ ResultFD = FD;
+ return std::error_code();
+}
+} // end namespace fs
+
+namespace path {
+static bool getKnownFolderPath(KNOWNFOLDERID folderId,
+ SmallVectorImpl<char> &result) {
+ wchar_t *path = nullptr;
+ if (::SHGetKnownFolderPath(folderId, KF_FLAG_CREATE, nullptr, &path) != S_OK)
+ return false;
+
+ bool ok = !UTF16ToUTF8(path, ::wcslen(path), result);
+ ::CoTaskMemFree(path);
+ return ok;
+}
+
+bool getUserCacheDir(SmallVectorImpl<char> &Result) {
+ return getKnownFolderPath(FOLDERID_LocalAppData, Result);
+}
+
+bool home_directory(SmallVectorImpl<char> &result) {
+ return getKnownFolderPath(FOLDERID_Profile, result);
+}
+
+static bool getTempDirEnvVar(const wchar_t *Var, SmallVectorImpl<char> &Res) {
+ SmallVector<wchar_t, 1024> Buf;
+ size_t Size = 1024;
+ do {
+ Buf.reserve(Size);
+ Size = GetEnvironmentVariableW(Var, Buf.data(), Buf.capacity());
+ if (Size == 0)
+ return false;
+
+ // Try again with larger buffer.
+ } while (Size > Buf.capacity());
+ Buf.set_size(Size);
+
+ return !windows::UTF16ToUTF8(Buf.data(), Size, Res);
+}
+
+static bool getTempDirEnvVar(SmallVectorImpl<char> &Res) {
+ const wchar_t *EnvironmentVariables[] = {L"TMP", L"TEMP", L"USERPROFILE"};
+ for (auto *Env : EnvironmentVariables) {
+ if (getTempDirEnvVar(Env, Res))
+ return true;
}
+ return false;
+}
- // Best we can do with Unix permission bits is to interpret the owner
- // writable bit.
- if (si.mode & 0200) {
- if (bhfi.dwFileAttributes & FILE_ATTRIBUTE_READONLY) {
- if (!SetFileAttributes(path.c_str(),
- bhfi.dwFileAttributes & ~FILE_ATTRIBUTE_READONLY))
- return MakeErrMsg(ErrMsg, path + ": SetFileAttributes: ");
- }
- } else {
- if (!(bhfi.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) {
- if (!SetFileAttributes(path.c_str(),
- bhfi.dwFileAttributes | FILE_ATTRIBUTE_READONLY))
- return MakeErrMsg(ErrMsg, path + ": SetFileAttributes: ");
- }
+void system_temp_directory(bool ErasedOnReboot, SmallVectorImpl<char> &Result) {
+ (void)ErasedOnReboot;
+ Result.clear();
+
+ // Check whether the temporary directory is specified by an environment var.
+ // This matches GetTempPath logic to some degree. GetTempPath is not used
+ // directly as it cannot handle evn var longer than 130 chars on Windows 7
+ // (fixed on Windows 8).
+ if (getTempDirEnvVar(Result)) {
+ assert(!Result.empty() && "Unexpected empty path");
+ native(Result); // Some Unix-like shells use Unix path separator in $TMP.
+ fs::make_absolute(Result); // Make it absolute if not already.
+ return;
}
- return false;
+ // Fall back to a system default.
+ const char *DefaultResult = "C:\\Temp";
+ Result.append(DefaultResult, DefaultResult + strlen(DefaultResult));
}
+} // end namespace path
+
+namespace windows {
+std::error_code UTF8ToUTF16(llvm::StringRef utf8,
+ llvm::SmallVectorImpl<wchar_t> &utf16) {
+ if (!utf8.empty()) {
+ int len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8.begin(),
+ utf8.size(), utf16.begin(), 0);
-bool
-Path::makeUnique(bool reuse_current, std::string* ErrMsg) {
- bool Exists;
- if (reuse_current && (fs::exists(path, Exists) || !Exists))
- return false; // File doesn't exist already, just use it!
-
- // Reserve space for -XXXXXX at the end.
- char *FNBuffer = (char*) alloca(path.size()+8);
- unsigned offset = path.size();
- path.copy(FNBuffer, offset);
-
- // Find a numeric suffix that isn't used by an existing file. Assume there
- // won't be more than 1 million files with the same prefix. Probably a safe
- // bet.
- static int FCounter = -1;
- if (FCounter < 0) {
- // Give arbitrary initial seed.
- // FIXME: We should use sys::fs::unique_file() in future.
- LARGE_INTEGER cnt64;
- DWORD x = GetCurrentProcessId();
- x = (x << 16) | (x >> 16);
- if (QueryPerformanceCounter(&cnt64)) // RDTSC
- x ^= cnt64.HighPart ^ cnt64.LowPart;
- FCounter = x % 1000000;
+ if (len == 0)
+ return mapWindowsError(::GetLastError());
+
+ utf16.reserve(len + 1);
+ utf16.set_size(len);
+
+ len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8.begin(),
+ utf8.size(), utf16.begin(), utf16.size());
+
+ if (len == 0)
+ return mapWindowsError(::GetLastError());
}
- do {
- sprintf(FNBuffer+offset, "-%06u", FCounter);
- if (++FCounter > 999999)
- FCounter = 0;
- path = FNBuffer;
- } while (!fs::exists(path, Exists) && Exists);
- return false;
+
+ // Make utf16 null terminated.
+ utf16.push_back(0);
+ utf16.pop_back();
+
+ return std::error_code();
}
-bool
-Path::createTemporaryFileOnDisk(bool reuse_current, std::string* ErrMsg) {
- // Make this into a unique file name
- makeUnique(reuse_current, ErrMsg);
+static
+std::error_code UTF16ToCodePage(unsigned codepage, const wchar_t *utf16,
+ size_t utf16_len,
+ llvm::SmallVectorImpl<char> &utf8) {
+ if (utf16_len) {
+ // Get length.
+ int len = ::WideCharToMultiByte(codepage, 0, utf16, utf16_len, utf8.begin(),
+ 0, NULL, NULL);
- // Now go and create it
- HANDLE h = CreateFile(path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_NEW,
- FILE_ATTRIBUTE_NORMAL, NULL);
- if (h == INVALID_HANDLE_VALUE)
- return MakeErrMsg(ErrMsg, path + ": can't create file");
+ if (len == 0)
+ return mapWindowsError(::GetLastError());
- CloseHandle(h);
- return false;
+ utf8.reserve(len);
+ utf8.set_size(len);
+
+ // Now do the actual conversion.
+ len = ::WideCharToMultiByte(codepage, 0, utf16, utf16_len, utf8.data(),
+ utf8.size(), NULL, NULL);
+
+ if (len == 0)
+ return mapWindowsError(::GetLastError());
+ }
+
+ // Make utf8 null terminated.
+ utf8.push_back(0);
+ utf8.pop_back();
+
+ return std::error_code();
}
+
+std::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
+ llvm::SmallVectorImpl<char> &utf8) {
+ return UTF16ToCodePage(CP_UTF8, utf16, utf16_len, utf8);
}
+
+std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len,
+ llvm::SmallVectorImpl<char> &utf8) {
+ return UTF16ToCodePage(CP_ACP, utf16, utf16_len, utf8);
}
+} // end namespace windows
+} // end namespace sys
+} // end namespace llvm
projects / oota-llvm.git / blobdiff