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Diffstat (limited to 'contrib/llvm/lib/Support/Windows/Path.inc')
| -rw-r--r-- | contrib/llvm/lib/Support/Windows/Path.inc | 1122 |
1 files changed, 1122 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Support/Windows/Path.inc b/contrib/llvm/lib/Support/Windows/Path.inc new file mode 100644 index 0000000..0b39198 --- /dev/null +++ b/contrib/llvm/lib/Support/Windows/Path.inc @@ -0,0 +1,1122 @@ +//===- llvm/Support/Windows/Path.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 Path API. +// +//===----------------------------------------------------------------------===// + +//===----------------------------------------------------------------------===// +//=== WARNING: Implementation here must contain only generic Windows code that +//=== is guaranteed to work on *all* Windows variants. +//===----------------------------------------------------------------------===// + +#include "llvm/ADT/STLExtras.h" +#include "Windows.h" +#include <fcntl.h> +#include <io.h> +#include <sys/stat.h> +#include <sys/types.h> + +#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 + +using namespace llvm; + +using llvm::sys::windows::UTF8ToUTF16; +using llvm::sys::windows::UTF16ToUTF8; + +namespace { + typedef BOOLEAN (WINAPI *PtrCreateSymbolicLinkW)( + /*__in*/ LPCWSTR lpSymlinkFileName, + /*__in*/ LPCWSTR lpTargetFileName, + /*__in*/ DWORD dwFlags); + + PtrCreateSymbolicLinkW create_symbolic_link_api = + PtrCreateSymbolicLinkW(::GetProcAddress( + ::GetModuleHandleW(L"Kernel32.dll"), "CreateSymbolicLinkW")); + + 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 error_code::success(); + } + + bool is_separator(const wchar_t value) { + switch (value) { + case L'\\': + case L'/': + return true; + default: + return false; + } + } +} + +// FIXME: mode should be used here and default to user r/w only, +// it currently comes in as a UNIX mode. +static error_code createUniqueEntity(const Twine &model, int &result_fd, + SmallVectorImpl<char> &result_path, + bool makeAbsolute, unsigned mode, + FSEntity Type) { + // 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; + + if (makeAbsolute) { + // Make model absolute by prepending a temp directory if it's not already. + bool absolute = sys::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(L"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(); + + HANDLE TempFileHandle = INVALID_HANDLE_VALUE; + + switch (Type) { + case FS_File: { + // Try to create + open the path. + 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; + + 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; + break; + } + + case FS_Name: { + DWORD attributes = ::GetFileAttributesW(random_path_utf16.begin()); + if (attributes != INVALID_FILE_ATTRIBUTES) + goto retry_random_path; + error_code EC = make_error_code(windows_error(::GetLastError())); + if (EC != windows_error::file_not_found && + EC != windows_error::path_not_found) + return EC; + break; + } + + case FS_Dir: + if (!::CreateDirectoryW(random_path_utf16.begin(), NULL)) { + error_code EC = windows_error(::GetLastError()); + if (EC != windows_error::already_exists) + return EC; + goto retry_random_path; + } + break; + } + + // 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)) { + switch (Type) { + case FS_File: + ::CloseHandle(TempFileHandle); + ::DeleteFileW(random_path_utf16.begin()); + case FS_Name: + break; + case FS_Dir: + ::RemoveDirectoryW(random_path_utf16.begin()); + break; + } + return ec; + } + + return error_code::success(); +} + +namespace llvm { +namespace sys { +namespace fs { + +std::string getMainExecutable(const char *argv0, void *MainExecAddr) { + SmallVector<wchar_t, MAX_PATH> PathName; + DWORD Size = ::GetModuleFileNameW(NULL, PathName.data(), PathName.capacity()); + + // A zero return value indicates a failure other than insufficient space. + if (Size == 0) + return ""; + + // Insufficient space is determined by a return value equal to the size of + // the buffer passed in. + if (Size == PathName.capacity()) + return ""; + + // On success, GetModuleFileNameW returns the number of characters written to + // the buffer not including the NULL terminator. + PathName.set_size(Size); + + // Convert the result from UTF-16 to UTF-8. + SmallVector<char, MAX_PATH> PathNameUTF8; + if (UTF16ToUTF8(PathName.data(), PathName.size(), PathNameUTF8)) + return ""; + + return std::string(PathNameUTF8.data()); +} + +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 UniqueID(VolumeSerialNumber, FileID); +} + +TimeValue file_status::getLastModificationTime() const { + ULARGE_INTEGER UI; + UI.LowPart = LastWriteTimeLow; + UI.HighPart = LastWriteTimeHigh; + + TimeValue Ret; + Ret.fromWin32Time(UI.QuadPart); + return Ret; +} + +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 windows_error(::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); +} + +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 error_code::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 error_code::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 error_code::success(); +} + +error_code remove(const Twine &path, bool &existed) { + SmallString<128> path_storage; + SmallVector<wchar_t, 128> path_utf16; + + file_status st; + error_code EC = status(path, st); + if (EC) { + if (EC == windows_error::file_not_found || + EC == windows_error::path_not_found) { + existed = false; + return error_code::success(); + } + 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 error_code::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; + + error_code ec = error_code::success(); + for (int i = 0; i < 2000; i++) { + if (::MoveFileExW(wide_from.begin(), wide_to.begin(), + MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING)) + return error_code::success(); + ec = windows_error(::GetLastError()); + if (ec != windows_error::access_denied) + break; + // Retry MoveFile() at ACCESS_DENIED. + // System scanners (eg. indexer) might open the source file when + // It is written and closed. + ::Sleep(1); + } + + return ec; +} + +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 | _O_RDWR, 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 error_code::success(); +} + +bool can_write(const Twine &Path) { + // FIXME: take security attributes into account. + SmallString<128> PathStorage; + SmallVector<wchar_t, 128> PathUtf16; + + if (UTF8ToUTF16(Path.toStringRef(PathStorage), PathUtf16)) + return false; + + DWORD Attr = ::GetFileAttributesW(PathUtf16.begin()); + return (Attr != INVALID_FILE_ATTRIBUTES) && !(Attr & FILE_ATTRIBUTE_READONLY); +} + +bool can_execute(const Twine &Path) { + SmallString<128> PathStorage; + SmallVector<wchar_t, 128> PathUtf16; + + if (UTF8ToUTF16(Path.toStringRef(PathStorage), PathUtf16)) + return false; + + DWORD Attr = ::GetFileAttributesW(PathUtf16.begin()); + return Attr != INVALID_FILE_ATTRIBUTES; +} + +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; +} + +error_code equivalent(const Twine &A, const Twine &B, bool &result) { + file_status fsA, fsB; + if (error_code ec = status(A, fsA)) return ec; + if (error_code ec = status(B, fsB)) return ec; + result = equivalent(fsA, fsB); + return error_code::success(); +} + +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 *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; + + // 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; +} + +static 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 windows_error(Err); + Result = file_status(file_type::type_unknown); + return error_code::success(); + } + case FILE_TYPE_DISK: + break; + case FILE_TYPE_CHAR: + Result = file_status(file_type::character_file); + return error_code::success(); + case FILE_TYPE_PIPE: + Result = file_status(file_type::fifo_file); + return error_code::success(); + } + + 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 error_code::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; +} + +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 error_code::success(); + } + + if (error_code ec = UTF8ToUTF16(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); + } + + 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); +} + +error_code status(int FD, file_status &Result) { + HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD)); + return getStatus(FileHandle, Result); +} + +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 windows_error(::GetLastError()); + return error_code::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 <= len) + result.set_size(bytes_read); + // ERROR_HANDLE_EOF is mapped to errc::value_too_large. + return ec; + } + + result.set_size(len); + return error_code::success(); +} + +error_code mapped_file_region::init(int FD, bool CloseFD, uint64_t Offset) { + FileDescriptor = FD; + // Make sure that the requested size fits within SIZE_T. + if (Size > std::numeric_limits<SIZE_T>::max()) { + if (FileDescriptor) { + if (CloseFD) + _close(FileDescriptor); + } else + ::CloseHandle(FileHandle); + return make_error_code(errc::invalid_argument); + } + + DWORD flprotect; + switch (Mode) { + case readonly: flprotect = PAGE_READONLY; break; + case readwrite: flprotect = PAGE_READWRITE; break; + case priv: flprotect = PAGE_WRITECOPY; break; + } + + FileMappingHandle = + ::CreateFileMappingW(FileHandle, 0, flprotect, + (Offset + Size) >> 32, + (Offset + Size) & 0xffffffff, + 0); + if (FileMappingHandle == NULL) { + error_code ec = windows_error(GetLastError()); + if (FileDescriptor) { + if (CloseFD) + _close(FileDescriptor); + } else + ::CloseHandle(FileHandle); + 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) { + error_code ec = windows_error(GetLastError()); + ::CloseHandle(FileMappingHandle); + if (FileDescriptor) { + if (CloseFD) + _close(FileDescriptor); + } else + ::CloseHandle(FileHandle); + return ec; + } + + if (Size == 0) { + MEMORY_BASIC_INFORMATION mbi; + SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi)); + if (Result == 0) { + error_code ec = windows_error(GetLastError()); + ::UnmapViewOfFile(Mapping); + ::CloseHandle(FileMappingHandle); + if (FileDescriptor) { + if (CloseFD) + _close(FileDescriptor); + } else + ::CloseHandle(FileHandle); + return ec; + } + Size = mbi.RegionSize; + } + + // Close all the handles except for the view. It will keep the other handles + // alive. + ::CloseHandle(FileMappingHandle); + if (FileDescriptor) { + if (CloseFD) + _close(FileDescriptor); // Also closes FileHandle. + } else + ::CloseHandle(FileHandle); + return error_code::success(); +} + +mapped_file_region::mapped_file_region(const Twine &path, + mapmode mode, + uint64_t length, + uint64_t offset, + error_code &ec) + : Mode(mode) + , Size(length) + , Mapping() + , FileDescriptor() + , FileHandle(INVALID_HANDLE_VALUE) + , FileMappingHandle() { + SmallString<128> path_storage; + SmallVector<wchar_t, 128> path_utf16; + + // Convert path to UTF-16. + if ((ec = UTF8ToUTF16(path.toStringRef(path_storage), path_utf16))) + return; + + // Get file handle for creating a file mapping. + FileHandle = ::CreateFileW(c_str(path_utf16), + Mode == readonly ? GENERIC_READ + : GENERIC_READ | GENERIC_WRITE, + Mode == readonly ? FILE_SHARE_READ + : 0, + 0, + Mode == readonly ? OPEN_EXISTING + : OPEN_ALWAYS, + Mode == readonly ? FILE_ATTRIBUTE_READONLY + : FILE_ATTRIBUTE_NORMAL, + 0); + if (FileHandle == INVALID_HANDLE_VALUE) { + ec = windows_error(::GetLastError()); + return; + } + + FileDescriptor = 0; + ec = init(FileDescriptor, true, offset); + if (ec) { + Mapping = FileMappingHandle = 0; + FileHandle = INVALID_HANDLE_VALUE; + FileDescriptor = 0; + } +} + +mapped_file_region::mapped_file_region(int fd, + bool closefd, + mapmode mode, + uint64_t length, + uint64_t offset, + error_code &ec) + : Mode(mode) + , Size(length) + , Mapping() + , FileDescriptor(fd) + , FileHandle(INVALID_HANDLE_VALUE) + , FileMappingHandle() { + FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(fd)); + if (FileHandle == INVALID_HANDLE_VALUE) { + if (closefd) + _close(FileDescriptor); + FileDescriptor = 0; + ec = make_error_code(errc::bad_file_descriptor); + return; + } + + ec = init(FileDescriptor, closefd, offset); + if (ec) { + Mapping = FileMappingHandle = 0; + FileHandle = INVALID_HANDLE_VALUE; + FileDescriptor = 0; + } +} + +mapped_file_region::~mapped_file_region() { + if (Mapping) + ::UnmapViewOfFile(Mapping); +} + +#if LLVM_HAS_RVALUE_REFERENCES +mapped_file_region::mapped_file_region(mapped_file_region &&other) + : Mode(other.Mode) + , Size(other.Size) + , Mapping(other.Mapping) + , FileDescriptor(other.FileDescriptor) + , FileHandle(other.FileHandle) + , FileMappingHandle(other.FileMappingHandle) { + other.Mapping = other.FileMappingHandle = 0; + other.FileHandle = INVALID_HANDLE_VALUE; + other.FileDescriptor = 0; +} +#endif + +mapped_file_region::mapmode mapped_file_region::flags() const { + assert(Mapping && "Mapping failed but used anyway!"); + return Mode; +} + +uint64_t mapped_file_region::size() const { + assert(Mapping && "Mapping failed but used anyway!"); + return Size; +} + +char *mapped_file_region::data() const { + assert(Mode != readonly && "Cannot get non const data for readonly mapping!"); + assert(Mapping && "Mapping failed but used anyway!"); + return reinterpret_cast<char*>(Mapping); +} + +const char *mapped_file_region::const_data() const { + assert(Mapping && "Mapping failed but used anyway!"); + return reinterpret_cast<const char*>(Mapping); +} + +int mapped_file_region::alignment() { + SYSTEM_INFO SysInfo; + ::GetSystemInfo(&SysInfo); + return SysInfo.dwAllocationGranularity; +} + +error_code detail::directory_iterator_construct(detail::DirIterState &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 detail::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 error_code::success(); +} + +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 error_code::success(); +} + +error_code detail::directory_iterator_increment(detail::DirIterState &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 detail::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 error_code::success(); +} + +error_code map_file_pages(const Twine &path, off_t file_offset, size_t size, + bool map_writable, void *&result) { + assert(0 && "NOT IMPLEMENTED"); + return windows_error::invalid_function; +} + +error_code unmap_file_pages(void *base, size_t size) { + assert(0 && "NOT IMPLEMENTED"); + return windows_error::invalid_function; +} + +error_code openFileForRead(const Twine &Name, int &ResultFD) { + SmallString<128> PathStorage; + SmallVector<wchar_t, 128> PathUTF16; + + if (error_code EC = UTF8ToUTF16(Name.toStringRef(PathStorage), + PathUTF16)) + return EC; + + HANDLE H = ::CreateFileW(PathUTF16.begin(), GENERIC_READ, + FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, + OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); + if (H == INVALID_HANDLE_VALUE) { + error_code EC = windows_error(::GetLastError()); + // 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 (EC != windows_error::access_denied) + return EC; + if (is_directory(Name)) + return error_code(errc::is_a_directory, posix_category()); + return EC; + } + + int FD = ::_open_osfhandle(intptr_t(H), 0); + if (FD == -1) { + ::CloseHandle(H); + return windows_error::invalid_handle; + } + + ResultFD = FD; + return error_code::success(); +} + +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!"); + + SmallString<128> PathStorage; + SmallVector<wchar_t, 128> PathUTF16; + + if (error_code EC = UTF8ToUTF16(Name.toStringRef(PathStorage), + PathUTF16)) + return EC; + + DWORD CreationDisposition; + if (Flags & F_Excl) + CreationDisposition = CREATE_NEW; + else if (Flags & F_Append) + CreationDisposition = OPEN_ALWAYS; + else + CreationDisposition = CREATE_ALWAYS; + + HANDLE H = ::CreateFileW(PathUTF16.begin(), GENERIC_WRITE, + FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, + CreationDisposition, FILE_ATTRIBUTE_NORMAL, NULL); + + if (H == INVALID_HANDLE_VALUE) { + error_code EC = windows_error(::GetLastError()); + // 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 (EC != windows_error::access_denied) + return EC; + if (is_directory(Name)) + return error_code(errc::is_a_directory, posix_category()); + return EC; + } + + int OpenFlags = 0; + if (Flags & F_Append) + OpenFlags |= _O_APPEND; + + if (!(Flags & F_Binary)) + OpenFlags |= _O_TEXT; + + int FD = ::_open_osfhandle(intptr_t(H), OpenFlags); + if (FD == -1) { + ::CloseHandle(H); + return windows_error::invalid_handle; + } + + ResultFD = FD; + return error_code::success(); +} +} // end namespace fs + +namespace windows { +llvm::error_code UTF8ToUTF16(llvm::StringRef utf8, + llvm::SmallVectorImpl<wchar_t> &utf16) { + int len = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, + utf8.begin(), utf8.size(), + utf16.begin(), 0); + + if (len == 0) + return llvm::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 llvm::windows_error(::GetLastError()); + + // Make utf16 null terminated. + utf16.push_back(0); + utf16.pop_back(); + + return llvm::error_code::success(); +} + +llvm::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len, + llvm::SmallVectorImpl<char> &utf8) { + // Get length. + int len = ::WideCharToMultiByte(CP_UTF8, 0, + utf16, utf16_len, + utf8.begin(), 0, + NULL, NULL); + + if (len == 0) + return llvm::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 llvm::windows_error(::GetLastError()); + + // Make utf8 null terminated. + utf8.push_back(0); + utf8.pop_back(); + + return llvm::error_code::success(); +} +} // end namespace windows +} // end namespace sys +} // end namespace llvm |
