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diff --git a/lib/Support/Windows/PathV2.inc b/lib/Support/Windows/PathV2.inc
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+//===- llvm/Support/Windows/PathV2.inc - Windows Path Impl ------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Windows specific implementation of the PathV2 API.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic Windows code that
+//=== is guaranteed to work on *all* Windows variants.
+//===----------------------------------------------------------------------===//
+
+#include "Windows.h"
+#include <wincrypt.h>
+#include <fcntl.h>
+#include <io.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+// MinGW doesn't define this.
+#ifndef _ERRNO_T_DEFINED
+#define _ERRNO_T_DEFINED
+typedef int errno_t;
+#endif
+
+using namespace llvm;
+
+namespace {
+ typedef BOOLEAN (WINAPI *PtrCreateSymbolicLinkW)(
+ /*__in*/ LPCWSTR lpSymlinkFileName,
+ /*__in*/ LPCWSTR lpTargetFileName,
+ /*__in*/ DWORD dwFlags);
+
+ PtrCreateSymbolicLinkW create_symbolic_link_api = PtrCreateSymbolicLinkW(
+ ::GetProcAddress(::GetModuleHandleA("kernel32.dll"),
+ "CreateSymbolicLinkW"));
+
+ error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16) {
+ int len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
+ utf8.begin(), utf8.size(),
+ utf16.begin(), 0);
+
+ if (len == 0)
+ return windows_error(::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 windows_error(::GetLastError());
+
+ // Make utf16 null terminated.
+ utf16.push_back(0);
+ utf16.pop_back();
+
+ return success;
+ }
+
+ error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
+ SmallVectorImpl<char> &utf8) {
+ // Get length.
+ int len = ::WideCharToMultiByte(CP_UTF8, 0,
+ utf16, utf16_len,
+ utf8.begin(), 0,
+ NULL, NULL);
+
+ if (len == 0)
+ return windows_error(::GetLastError());
+
+ utf8.reserve(len);
+ utf8.set_size(len);
+
+ // Now do the actual conversion.
+ len = ::WideCharToMultiByte(CP_UTF8, 0,
+ utf16, utf16_len,
+ utf8.data(), utf8.size(),
+ NULL, NULL);
+
+ if (len == 0)
+ return windows_error(::GetLastError());
+
+ // Make utf8 null terminated.
+ utf8.push_back(0);
+ utf8.pop_back();
+
+ return success;
+ }
+
+ error_code TempDir(SmallVectorImpl<wchar_t> &result) {
+ retry_temp_dir:
+ DWORD len = ::GetTempPathW(result.capacity(), result.begin());
+
+ if (len == 0)
+ return windows_error(::GetLastError());
+
+ if (len > result.capacity()) {
+ result.reserve(len);
+ goto retry_temp_dir;
+ }
+
+ result.set_size(len);
+ return success;
+ }
+
+ // Forwarder for ScopedHandle.
+ BOOL WINAPI CryptReleaseContext(HCRYPTPROV Provider) {
+ return ::CryptReleaseContext(Provider, 0);
+ }
+
+ typedef ScopedHandle<HCRYPTPROV, uintptr_t(-1),
+ BOOL (WINAPI*)(HCRYPTPROV), CryptReleaseContext>
+ ScopedCryptContext;
+ bool is_separator(const wchar_t value) {
+ switch (value) {
+ case L'\\':
+ case L'/':
+ return true;
+ default:
+ return false;
+ }
+ }
+}
+
+namespace llvm {
+namespace sys {
+namespace fs {
+
+error_code current_path(SmallVectorImpl<char> &result) {
+ SmallVector<wchar_t, 128> cur_path;
+ cur_path.reserve(128);
+retry_cur_dir:
+ DWORD len = ::GetCurrentDirectoryW(cur_path.capacity(), cur_path.data());
+
+ // A zero return value indicates a failure other than insufficient space.
+ if (len == 0)
+ return windows_error(::GetLastError());
+
+ // If there's insufficient space, the len returned is larger than the len
+ // given.
+ if (len > cur_path.capacity()) {
+ cur_path.reserve(len);
+ goto retry_cur_dir;
+ }
+
+ cur_path.set_size(len);
+ // cur_path now holds the current directory in utf-16. Convert to utf-8.
+
+ // Find out how much space we need. Sadly, this function doesn't return the
+ // size needed unless you tell it the result size is 0, which means you
+ // _always_ have to call it twice.
+ len = ::WideCharToMultiByte(CP_UTF8, 0,
+ cur_path.data(), cur_path.size(),
+ result.data(), 0,
+ NULL, NULL);
+
+ if (len == 0)
+ return make_error_code(windows_error(::GetLastError()));
+
+ result.reserve(len);
+ result.set_size(len);
+ // Now do the actual conversion.
+ len = ::WideCharToMultiByte(CP_UTF8, 0,
+ cur_path.data(), cur_path.size(),
+ result.data(), result.size(),
+ NULL, NULL);
+ if (len == 0)
+ return windows_error(::GetLastError());
+
+ return success;
+}
+
+error_code copy_file(const Twine &from, const Twine &to, copy_option copt) {
+ // Get arguments.
+ SmallString<128> from_storage;
+ SmallString<128> to_storage;
+ StringRef f = from.toStringRef(from_storage);
+ StringRef t = to.toStringRef(to_storage);
+
+ // Convert to utf-16.
+ SmallVector<wchar_t, 128> wide_from;
+ SmallVector<wchar_t, 128> wide_to;
+ if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
+ if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
+
+ // Copy the file.
+ BOOL res = ::CopyFileW(wide_from.begin(), wide_to.begin(),
+ copt != copy_option::overwrite_if_exists);
+
+ if (res == 0)
+ return windows_error(::GetLastError());
+
+ return success;
+}
+
+error_code create_directory(const Twine &path, bool &existed) {
+ SmallString<128> path_storage;
+ SmallVector<wchar_t, 128> path_utf16;
+
+ if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
+ path_utf16))
+ return ec;
+
+ if (!::CreateDirectoryW(path_utf16.begin(), NULL)) {
+ error_code ec = windows_error(::GetLastError());
+ if (ec == windows_error::already_exists)
+ existed = true;
+ else
+ return ec;
+ } else
+ existed = false;
+
+ return success;
+}
+
+error_code create_hard_link(const Twine &to, const Twine &from) {
+ // Get arguments.
+ SmallString<128> from_storage;
+ SmallString<128> to_storage;
+ StringRef f = from.toStringRef(from_storage);
+ StringRef t = to.toStringRef(to_storage);
+
+ // Convert to utf-16.
+ SmallVector<wchar_t, 128> wide_from;
+ SmallVector<wchar_t, 128> wide_to;
+ if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
+ if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
+
+ if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL))
+ return windows_error(::GetLastError());
+
+ return success;
+}
+
+error_code create_symlink(const Twine &to, const Twine &from) {
+ // Only do it if the function is available at runtime.
+ if (!create_symbolic_link_api)
+ return make_error_code(errc::function_not_supported);
+
+ // Get arguments.
+ SmallString<128> from_storage;
+ SmallString<128> to_storage;
+ StringRef f = from.toStringRef(from_storage);
+ StringRef t = to.toStringRef(to_storage);
+
+ // Convert to utf-16.
+ SmallVector<wchar_t, 128> wide_from;
+ SmallVector<wchar_t, 128> wide_to;
+ if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
+ if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
+
+ if (!create_symbolic_link_api(wide_from.begin(), wide_to.begin(), 0))
+ return windows_error(::GetLastError());
+
+ return success;
+}
+
+error_code remove(const Twine &path, bool &existed) {
+ SmallString<128> path_storage;
+ SmallVector<wchar_t, 128> path_utf16;
+
+ file_status st;
+ if (error_code ec = status(path, st))
+ return ec;
+
+ if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
+ path_utf16))
+ return ec;
+
+ if (st.type() == file_type::directory_file) {
+ if (!::RemoveDirectoryW(c_str(path_utf16))) {
+ error_code ec = windows_error(::GetLastError());
+ if (ec != windows_error::file_not_found)
+ return ec;
+ existed = false;
+ } else
+ existed = true;
+ } else {
+ if (!::DeleteFileW(c_str(path_utf16))) {
+ error_code ec = windows_error(::GetLastError());
+ if (ec != windows_error::file_not_found)
+ return ec;
+ existed = false;
+ } else
+ existed = true;
+ }
+
+ return success;
+}
+
+error_code rename(const Twine &from, const Twine &to) {
+ // Get arguments.
+ SmallString<128> from_storage;
+ SmallString<128> to_storage;
+ StringRef f = from.toStringRef(from_storage);
+ StringRef t = to.toStringRef(to_storage);
+
+ // Convert to utf-16.
+ SmallVector<wchar_t, 128> wide_from;
+ SmallVector<wchar_t, 128> wide_to;
+ if (error_code ec = UTF8ToUTF16(f, wide_from)) return ec;
+ if (error_code ec = UTF8ToUTF16(t, wide_to)) return ec;
+
+ if (!::MoveFileExW(wide_from.begin(), wide_to.begin(),
+ MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
+ return windows_error(::GetLastError());
+
+ return success;
+}
+
+error_code resize_file(const Twine &path, uint64_t size) {
+ SmallString<128> path_storage;
+ SmallVector<wchar_t, 128> path_utf16;
+
+ if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
+ path_utf16))
+ return ec;
+
+ int fd = ::_wopen(path_utf16.begin(), O_BINARY, S_IREAD | S_IWRITE);
+ if (fd == -1)
+ return error_code(errno, generic_category());
+#ifdef HAVE__CHSIZE_S
+ errno_t error = ::_chsize_s(fd, size);
+#else
+ errno_t error = ::_chsize(fd, size);
+#endif
+ ::close(fd);
+ return error_code(error, generic_category());
+}
+
+error_code exists(const Twine &path, bool &result) {
+ SmallString<128> path_storage;
+ SmallVector<wchar_t, 128> path_utf16;
+
+ if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
+ path_utf16))
+ return ec;
+
+ DWORD attributes = ::GetFileAttributesW(path_utf16.begin());
+
+ if (attributes == INVALID_FILE_ATTRIBUTES) {
+ // See if the file didn't actually exist.
+ error_code ec = make_error_code(windows_error(::GetLastError()));
+ if (ec != windows_error::file_not_found &&
+ ec != windows_error::path_not_found)
+ return ec;
+ result = false;
+ } else
+ result = true;
+ return success;
+}
+
+error_code equivalent(const Twine &A, const Twine &B, bool &result) {
+ // Get arguments.
+ SmallString<128> a_storage;
+ SmallString<128> b_storage;
+ StringRef a = A.toStringRef(a_storage);
+ StringRef b = B.toStringRef(b_storage);
+
+ // Convert to utf-16.
+ SmallVector<wchar_t, 128> wide_a;
+ SmallVector<wchar_t, 128> wide_b;
+ if (error_code ec = UTF8ToUTF16(a, wide_a)) return ec;
+ if (error_code ec = UTF8ToUTF16(b, wide_b)) return ec;
+
+ AutoHandle HandleB(
+ ::CreateFileW(wide_b.begin(),
+ 0,
+ FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
+ 0,
+ OPEN_EXISTING,
+ FILE_FLAG_BACKUP_SEMANTICS,
+ 0));
+
+ AutoHandle HandleA(
+ ::CreateFileW(wide_a.begin(),
+ 0,
+ FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
+ 0,
+ OPEN_EXISTING,
+ FILE_FLAG_BACKUP_SEMANTICS,
+ 0));
+
+ // If both handles are invalid, it's an error.
+ if (HandleA == INVALID_HANDLE_VALUE &&
+ HandleB == INVALID_HANDLE_VALUE)
+ return windows_error(::GetLastError());
+
+ // If only one is invalid, it's false.
+ if (HandleA == INVALID_HANDLE_VALUE &&
+ HandleB == INVALID_HANDLE_VALUE) {
+ result = false;
+ return success;
+ }
+
+ // Get file information.
+ BY_HANDLE_FILE_INFORMATION InfoA, InfoB;
+ if (!::GetFileInformationByHandle(HandleA, &InfoA))
+ return windows_error(::GetLastError());
+ if (!::GetFileInformationByHandle(HandleB, &InfoB))
+ return windows_error(::GetLastError());
+
+ // See if it's all the same.
+ result =
+ InfoA.dwVolumeSerialNumber == InfoB.dwVolumeSerialNumber &&
+ InfoA.nFileIndexHigh == InfoB.nFileIndexHigh &&
+ InfoA.nFileIndexLow == InfoB.nFileIndexLow &&
+ InfoA.nFileSizeHigh == InfoB.nFileSizeHigh &&
+ InfoA.nFileSizeLow == InfoB.nFileSizeLow &&
+ InfoA.ftLastWriteTime.dwLowDateTime ==
+ InfoB.ftLastWriteTime.dwLowDateTime &&
+ InfoA.ftLastWriteTime.dwHighDateTime ==
+ InfoB.ftLastWriteTime.dwHighDateTime;
+
+ return success;
+}
+
+error_code file_size(const Twine &path, uint64_t &result) {
+ SmallString<128> path_storage;
+ SmallVector<wchar_t, 128> path_utf16;
+
+ if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
+ path_utf16))
+ return ec;
+
+ WIN32_FILE_ATTRIBUTE_DATA FileData;
+ if (!::GetFileAttributesExW(path_utf16.begin(),
+ ::GetFileExInfoStandard,
+ &FileData))
+ return windows_error(::GetLastError());
+
+ result =
+ (uint64_t(FileData.nFileSizeHigh) << (sizeof(FileData.nFileSizeLow) * 8))
+ + FileData.nFileSizeLow;
+
+ return success;
+}
+
+error_code status(const Twine &path, file_status &result) {
+ SmallString<128> path_storage;
+ SmallVector<wchar_t, 128> path_utf16;
+
+ if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
+ path_utf16))
+ return ec;
+
+ DWORD attr = ::GetFileAttributesW(path_utf16.begin());
+ if (attr == INVALID_FILE_ATTRIBUTES)
+ goto handle_status_error;
+
+ // Handle reparse points.
+ if (attr & FILE_ATTRIBUTE_REPARSE_POINT) {
+ AutoHandle 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 == INVALID_HANDLE_VALUE)
+ goto handle_status_error;
+ }
+
+ if (attr & FILE_ATTRIBUTE_DIRECTORY)
+ result = file_status(file_type::directory_file);
+ else
+ result = file_status(file_type::regular_file);
+
+ return success;
+
+handle_status_error:
+ error_code ec = windows_error(::GetLastError());
+ if (ec == windows_error::file_not_found ||
+ ec == windows_error::path_not_found)
+ result = file_status(file_type::file_not_found);
+ else if (ec == windows_error::sharing_violation)
+ result = file_status(file_type::type_unknown);
+ else {
+ result = file_status(file_type::status_error);
+ return ec;
+ }
+
+ return success;
+}
+
+error_code unique_file(const Twine &model, int &result_fd,
+ SmallVectorImpl<char> &result_path) {
+ // Use result_path as temp storage.
+ result_path.set_size(0);
+ StringRef m = model.toStringRef(result_path);
+
+ SmallVector<wchar_t, 128> model_utf16;
+ if (error_code ec = UTF8ToUTF16(m, model_utf16)) return ec;
+
+ // Make model absolute by prepending a temp directory if it's not already.
+ bool absolute = path::is_absolute(m);
+
+ if (!absolute) {
+ SmallVector<wchar_t, 64> temp_dir;
+ if (error_code ec = TempDir(temp_dir)) return ec;
+ // Handle c: by removing it.
+ if (model_utf16.size() > 2 && model_utf16[1] == L':') {
+ model_utf16.erase(model_utf16.begin(), model_utf16.begin() + 2);
+ }
+ model_utf16.insert(model_utf16.begin(), temp_dir.begin(), temp_dir.end());
+ }
+
+ // Replace '%' with random chars. From here on, DO NOT modify model. It may be
+ // needed if the randomly chosen path already exists.
+ SmallVector<wchar_t, 128> random_path_utf16;
+
+ // Get a Crypto Provider for CryptGenRandom.
+ HCRYPTPROV HCPC;
+ if (!::CryptAcquireContextW(&HCPC,
+ NULL,
+ NULL,
+ PROV_RSA_FULL,
+ CRYPT_VERIFYCONTEXT))
+ return windows_error(::GetLastError());
+ ScopedCryptContext CryptoProvider(HCPC);
+
+retry_random_path:
+ random_path_utf16.set_size(0);
+ for (SmallVectorImpl<wchar_t>::const_iterator i = model_utf16.begin(),
+ e = model_utf16.end();
+ i != e; ++i) {
+ if (*i == L'%') {
+ BYTE val = 0;
+ if (!::CryptGenRandom(CryptoProvider, 1, &val))
+ return windows_error(::GetLastError());
+ random_path_utf16.push_back("0123456789abcdef"[val & 15]);
+ }
+ else
+ random_path_utf16.push_back(*i);
+ }
+ // Make random_path_utf16 null terminated.
+ random_path_utf16.push_back(0);
+ random_path_utf16.pop_back();
+
+ // Try to create + open the path.
+retry_create_file:
+ HANDLE TempFileHandle = ::CreateFileW(random_path_utf16.begin(),
+ GENERIC_READ | GENERIC_WRITE,
+ FILE_SHARE_READ,
+ NULL,
+ // Return ERROR_FILE_EXISTS if the file
+ // already exists.
+ CREATE_NEW,
+ FILE_ATTRIBUTE_TEMPORARY,
+ NULL);
+ if (TempFileHandle == INVALID_HANDLE_VALUE) {
+ // If the file existed, try again, otherwise, error.
+ error_code ec = windows_error(::GetLastError());
+ if (ec == windows_error::file_exists)
+ goto retry_random_path;
+ // Check for non-existing parent directories.
+ if (ec == windows_error::path_not_found) {
+ // Create the directories using result_path as temp storage.
+ if (error_code ec = UTF16ToUTF8(random_path_utf16.begin(),
+ random_path_utf16.size(), result_path))
+ return ec;
+ StringRef p(result_path.begin(), result_path.size());
+ SmallString<64> dir_to_create;
+ for (path::const_iterator i = path::begin(p),
+ e = --path::end(p); i != e; ++i) {
+ path::append(dir_to_create, *i);
+ bool Exists;
+ if (error_code ec = exists(Twine(dir_to_create), Exists)) return ec;
+ if (!Exists) {
+ // If c: doesn't exist, bail.
+ if (i->endswith(":"))
+ return ec;
+
+ SmallVector<wchar_t, 64> dir_to_create_utf16;
+ if (error_code ec = UTF8ToUTF16(dir_to_create, dir_to_create_utf16))
+ return ec;
+
+ // Create the directory.
+ if (!::CreateDirectoryW(dir_to_create_utf16.begin(), NULL))
+ return windows_error(::GetLastError());
+ }
+ }
+ goto retry_create_file;
+ }
+ return ec;
+ }
+
+ // Set result_path to the utf-8 representation of the path.
+ if (error_code ec = UTF16ToUTF8(random_path_utf16.begin(),
+ random_path_utf16.size(), result_path)) {
+ ::CloseHandle(TempFileHandle);
+ ::DeleteFileW(random_path_utf16.begin());
+ return ec;
+ }
+
+ // Convert the Windows API file handle into a C-runtime handle.
+ int fd = ::_open_osfhandle(intptr_t(TempFileHandle), 0);
+ if (fd == -1) {
+ ::CloseHandle(TempFileHandle);
+ ::DeleteFileW(random_path_utf16.begin());
+ // MSDN doesn't say anything about _open_osfhandle setting errno or
+ // GetLastError(), so just return invalid_handle.
+ return windows_error::invalid_handle;
+ }
+
+ result_fd = fd;
+ return success;
+}
+
+error_code get_magic(const Twine &path, uint32_t len,
+ SmallVectorImpl<char> &result) {
+ SmallString<128> path_storage;
+ SmallVector<wchar_t, 128> path_utf16;
+ result.set_size(0);
+
+ // Convert path to UTF-16.
+ if (error_code ec = UTF8ToUTF16(path.toStringRef(path_storage),
+ path_utf16))
+ return ec;
+
+ // Open file.
+ HANDLE file = ::CreateFileW(c_str(path_utf16),
+ GENERIC_READ,
+ FILE_SHARE_READ,
+ NULL,
+ OPEN_EXISTING,
+ FILE_ATTRIBUTE_READONLY,
+ NULL);
+ if (file == INVALID_HANDLE_VALUE)
+ return windows_error(::GetLastError());
+
+ // Allocate buffer.
+ result.reserve(len);
+
+ // Get magic!
+ DWORD bytes_read = 0;
+ BOOL read_success = ::ReadFile(file, result.data(), len, &bytes_read, NULL);
+ error_code ec = windows_error(::GetLastError());
+ ::CloseHandle(file);
+ if (!read_success || (bytes_read != len)) {
+ // Set result size to the number of bytes read if it's valid.
+ if (bytes_read >= 0 && bytes_read <= len)
+ result.set_size(bytes_read);
+ // ERROR_HANDLE_EOF is mapped to errc::value_too_large.
+ return ec;
+ }
+
+ result.set_size(len);
+ return success;
+}
+
+error_code directory_iterator_construct(directory_iterator &it, StringRef path){
+ SmallVector<wchar_t, 128> path_utf16;
+
+ if (error_code ec = UTF8ToUTF16(path,
+ path_utf16))
+ return ec;
+
+ // 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 {
+ path_utf16.push_back(L'*');
+ }
+
+ // Get the first directory entry.
+ WIN32_FIND_DATAW FirstFind;
+ ScopedFindHandle FindHandle(::FindFirstFileW(c_str(path_utf16), &FirstFind));
+ if (!FindHandle)
+ return windows_error(::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)) {
+ error_code ec = windows_error(::GetLastError());
+ // Check for end.
+ if (ec == windows_error::no_more_files)
+ return directory_iterator_destruct(it);
+ return ec;
+ } else
+ FilenameLen = ::wcslen(FirstFind.cFileName);
+
+ // Construct the current directory entry.
+ SmallString<128> directory_entry_name_utf8;
+ if (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.str());
+ it.CurrentEntry = directory_entry(directory_entry_path.str());
+
+ return success;
+}
+
+error_code directory_iterator_destruct(directory_iterator& 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 success;
+}
+
+error_code directory_iterator_increment(directory_iterator& it) {
+ WIN32_FIND_DATAW FindData;
+ if (!::FindNextFileW(HANDLE(it.IterationHandle), &FindData)) {
+ error_code ec = windows_error(::GetLastError());
+ // Check for end.
+ if (ec == windows_error::no_more_files)
+ return directory_iterator_destruct(it);
+ return ec;
+ }
+
+ 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);
+
+ SmallString<128> directory_entry_path_utf8;
+ if (error_code ec = UTF16ToUTF8(FindData.cFileName,
+ ::wcslen(FindData.cFileName),
+ directory_entry_path_utf8))
+ return ec;
+
+ it.CurrentEntry.replace_filename(Twine(directory_entry_path_utf8));
+ return success;
+}
+
+} // end namespace fs
+} // end namespace sys
+} // end namespace llvm
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