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bf2b36bae1
After r210687, windows_error does nothing but call mapWindowsError. Other Windows/*.inc files directly call mapWindowsError. This patch updates Path.inc and Process.inc to do the same. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236409 91177308-0d34-0410-b5e6-96231b3b80d8
860 lines
27 KiB
C++
860 lines
27 KiB
C++
//===- llvm/Support/Windows/Path.inc - Windows Path Impl --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Windows specific implementation of the Path API.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only generic Windows code that
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//=== is guaranteed to work on *all* Windows variants.
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Support/WindowsError.h"
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#include <fcntl.h>
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#include <io.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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// These two headers must be included last, and make sure shlobj is required
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// after Windows.h to make sure it picks up our definition of _WIN32_WINNT
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#include "WindowsSupport.h"
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#include <shlobj.h>
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#undef max
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// MinGW doesn't define this.
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#ifndef _ERRNO_T_DEFINED
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#define _ERRNO_T_DEFINED
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typedef int errno_t;
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#endif
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#ifdef _MSC_VER
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# pragma comment(lib, "advapi32.lib") // This provides CryptAcquireContextW.
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#endif
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using namespace llvm;
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using llvm::sys::windows::UTF8ToUTF16;
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using llvm::sys::windows::UTF16ToUTF8;
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using llvm::sys::path::widenPath;
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static bool is_separator(const wchar_t value) {
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switch (value) {
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case L'\\':
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case L'/':
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return true;
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default:
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return false;
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}
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}
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namespace llvm {
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namespace sys {
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namespace path {
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// Convert a UTF-8 path to UTF-16. Also, if the absolute equivalent of the
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// path is longer than CreateDirectory can tolerate, make it absolute and
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// prefixed by '\\?\'.
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std::error_code widenPath(const Twine &Path8,
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SmallVectorImpl<wchar_t> &Path16) {
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const size_t MaxDirLen = MAX_PATH - 12; // Must leave room for 8.3 filename.
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// Several operations would convert Path8 to SmallString; more efficient to
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// do it once up front.
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SmallString<128> Path8Str;
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Path8.toVector(Path8Str);
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// If we made this path absolute, how much longer would it get?
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size_t CurPathLen;
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if (llvm::sys::path::is_absolute(Twine(Path8Str)))
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CurPathLen = 0; // No contribution from current_path needed.
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else {
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CurPathLen = ::GetCurrentDirectoryW(0, NULL);
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if (CurPathLen == 0)
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return mapWindowsError(::GetLastError());
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}
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// Would the absolute path be longer than our limit?
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if ((Path8Str.size() + CurPathLen) >= MaxDirLen &&
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!Path8Str.startswith("\\\\?\\")) {
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SmallString<2*MAX_PATH> FullPath("\\\\?\\");
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if (CurPathLen) {
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SmallString<80> CurPath;
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if (std::error_code EC = llvm::sys::fs::current_path(CurPath))
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return EC;
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FullPath.append(CurPath);
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}
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// Traverse the requested path, canonicalizing . and .. as we go (because
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// the \\?\ prefix is documented to treat them as real components).
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// The iterators don't report separators and append() always attaches
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// preferred_separator so we don't need to call native() on the result.
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for (llvm::sys::path::const_iterator I = llvm::sys::path::begin(Path8Str),
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E = llvm::sys::path::end(Path8Str);
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I != E; ++I) {
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if (I->size() == 1 && *I == ".")
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continue;
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if (I->size() == 2 && *I == "..")
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llvm::sys::path::remove_filename(FullPath);
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else
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llvm::sys::path::append(FullPath, *I);
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}
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return UTF8ToUTF16(FullPath, Path16);
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}
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// Just use the caller's original path.
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return UTF8ToUTF16(Path8Str, Path16);
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}
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} // end namespace path
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namespace fs {
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std::string getMainExecutable(const char *argv0, void *MainExecAddr) {
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SmallVector<wchar_t, MAX_PATH> PathName;
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DWORD Size = ::GetModuleFileNameW(NULL, PathName.data(), PathName.capacity());
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// A zero return value indicates a failure other than insufficient space.
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if (Size == 0)
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return "";
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// Insufficient space is determined by a return value equal to the size of
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// the buffer passed in.
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if (Size == PathName.capacity())
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return "";
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// On success, GetModuleFileNameW returns the number of characters written to
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// the buffer not including the NULL terminator.
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PathName.set_size(Size);
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// Convert the result from UTF-16 to UTF-8.
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SmallVector<char, MAX_PATH> PathNameUTF8;
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if (UTF16ToUTF8(PathName.data(), PathName.size(), PathNameUTF8))
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return "";
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return std::string(PathNameUTF8.data());
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}
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UniqueID file_status::getUniqueID() const {
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// The file is uniquely identified by the volume serial number along
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// with the 64-bit file identifier.
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uint64_t FileID = (static_cast<uint64_t>(FileIndexHigh) << 32ULL) |
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static_cast<uint64_t>(FileIndexLow);
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return UniqueID(VolumeSerialNumber, FileID);
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}
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TimeValue file_status::getLastModificationTime() const {
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ULARGE_INTEGER UI;
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UI.LowPart = LastWriteTimeLow;
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UI.HighPart = LastWriteTimeHigh;
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TimeValue Ret;
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Ret.fromWin32Time(UI.QuadPart);
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return Ret;
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}
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std::error_code current_path(SmallVectorImpl<char> &result) {
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SmallVector<wchar_t, MAX_PATH> cur_path;
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DWORD len = MAX_PATH;
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do {
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cur_path.reserve(len);
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len = ::GetCurrentDirectoryW(cur_path.capacity(), cur_path.data());
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// A zero return value indicates a failure other than insufficient space.
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if (len == 0)
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return mapWindowsError(::GetLastError());
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// If there's insufficient space, the len returned is larger than the len
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// given.
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} while (len > cur_path.capacity());
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// On success, GetCurrentDirectoryW returns the number of characters not
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// including the null-terminator.
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cur_path.set_size(len);
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return UTF16ToUTF8(cur_path.begin(), cur_path.size(), result);
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}
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std::error_code create_directory(const Twine &path, bool IgnoreExisting) {
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SmallVector<wchar_t, 128> path_utf16;
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if (std::error_code ec = widenPath(path, path_utf16))
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return ec;
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if (!::CreateDirectoryW(path_utf16.begin(), NULL)) {
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DWORD LastError = ::GetLastError();
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if (LastError != ERROR_ALREADY_EXISTS || !IgnoreExisting)
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return mapWindowsError(LastError);
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}
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return std::error_code();
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}
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// We can't use symbolic links for windows.
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std::error_code create_link(const Twine &to, const Twine &from) {
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// Convert to utf-16.
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SmallVector<wchar_t, 128> wide_from;
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SmallVector<wchar_t, 128> wide_to;
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if (std::error_code ec = widenPath(from, wide_from))
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return ec;
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if (std::error_code ec = widenPath(to, wide_to))
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return ec;
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if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL))
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return mapWindowsError(::GetLastError());
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return std::error_code();
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}
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std::error_code remove(const Twine &path, bool IgnoreNonExisting) {
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SmallVector<wchar_t, 128> path_utf16;
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file_status ST;
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if (std::error_code EC = status(path, ST)) {
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if (EC != errc::no_such_file_or_directory || !IgnoreNonExisting)
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return EC;
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return std::error_code();
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}
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if (std::error_code ec = widenPath(path, path_utf16))
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return ec;
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if (ST.type() == file_type::directory_file) {
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if (!::RemoveDirectoryW(c_str(path_utf16))) {
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std::error_code EC = mapWindowsError(::GetLastError());
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if (EC != errc::no_such_file_or_directory || !IgnoreNonExisting)
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return EC;
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}
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return std::error_code();
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}
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if (!::DeleteFileW(c_str(path_utf16))) {
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std::error_code EC = mapWindowsError(::GetLastError());
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if (EC != errc::no_such_file_or_directory || !IgnoreNonExisting)
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return EC;
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}
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return std::error_code();
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}
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std::error_code rename(const Twine &from, const Twine &to) {
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// Convert to utf-16.
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SmallVector<wchar_t, 128> wide_from;
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SmallVector<wchar_t, 128> wide_to;
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if (std::error_code ec = widenPath(from, wide_from))
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return ec;
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if (std::error_code ec = widenPath(to, wide_to))
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return ec;
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std::error_code ec = std::error_code();
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for (int i = 0; i < 2000; i++) {
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if (::MoveFileExW(wide_from.begin(), wide_to.begin(),
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MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
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return std::error_code();
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DWORD LastError = ::GetLastError();
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ec = mapWindowsError(LastError);
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if (LastError != ERROR_ACCESS_DENIED)
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break;
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// Retry MoveFile() at ACCESS_DENIED.
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// System scanners (eg. indexer) might open the source file when
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// It is written and closed.
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::Sleep(1);
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}
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return ec;
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}
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std::error_code resize_file(int FD, uint64_t Size) {
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#ifdef HAVE__CHSIZE_S
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errno_t error = ::_chsize_s(FD, Size);
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#else
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errno_t error = ::_chsize(FD, Size);
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#endif
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return std::error_code(error, std::generic_category());
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}
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std::error_code access(const Twine &Path, AccessMode Mode) {
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SmallVector<wchar_t, 128> PathUtf16;
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if (std::error_code EC = widenPath(Path, PathUtf16))
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return EC;
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DWORD Attributes = ::GetFileAttributesW(PathUtf16.begin());
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if (Attributes == INVALID_FILE_ATTRIBUTES) {
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// See if the file didn't actually exist.
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DWORD LastError = ::GetLastError();
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if (LastError != ERROR_FILE_NOT_FOUND &&
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LastError != ERROR_PATH_NOT_FOUND)
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return mapWindowsError(LastError);
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return errc::no_such_file_or_directory;
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}
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if (Mode == AccessMode::Write && (Attributes & FILE_ATTRIBUTE_READONLY))
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return errc::permission_denied;
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return std::error_code();
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}
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bool equivalent(file_status A, file_status B) {
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assert(status_known(A) && status_known(B));
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return A.FileIndexHigh == B.FileIndexHigh &&
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A.FileIndexLow == B.FileIndexLow &&
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A.FileSizeHigh == B.FileSizeHigh &&
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A.FileSizeLow == B.FileSizeLow &&
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A.LastWriteTimeHigh == B.LastWriteTimeHigh &&
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A.LastWriteTimeLow == B.LastWriteTimeLow &&
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A.VolumeSerialNumber == B.VolumeSerialNumber;
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}
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std::error_code equivalent(const Twine &A, const Twine &B, bool &result) {
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file_status fsA, fsB;
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if (std::error_code ec = status(A, fsA))
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return ec;
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if (std::error_code ec = status(B, fsB))
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return ec;
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result = equivalent(fsA, fsB);
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return std::error_code();
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}
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static bool isReservedName(StringRef path) {
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// This list of reserved names comes from MSDN, at:
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// http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx
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static const char *sReservedNames[] = { "nul", "con", "prn", "aux",
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"com1", "com2", "com3", "com4", "com5", "com6",
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"com7", "com8", "com9", "lpt1", "lpt2", "lpt3",
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"lpt4", "lpt5", "lpt6", "lpt7", "lpt8", "lpt9" };
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// First, check to see if this is a device namespace, which always
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// starts with \\.\, since device namespaces are not legal file paths.
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if (path.startswith("\\\\.\\"))
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return true;
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// Then compare against the list of ancient reserved names
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for (size_t i = 0; i < array_lengthof(sReservedNames); ++i) {
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if (path.equals_lower(sReservedNames[i]))
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return true;
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}
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// The path isn't what we consider reserved.
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return false;
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}
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static std::error_code getStatus(HANDLE FileHandle, file_status &Result) {
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if (FileHandle == INVALID_HANDLE_VALUE)
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goto handle_status_error;
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switch (::GetFileType(FileHandle)) {
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default:
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llvm_unreachable("Don't know anything about this file type");
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case FILE_TYPE_UNKNOWN: {
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DWORD Err = ::GetLastError();
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if (Err != NO_ERROR)
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return mapWindowsError(Err);
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Result = file_status(file_type::type_unknown);
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return std::error_code();
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}
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case FILE_TYPE_DISK:
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break;
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case FILE_TYPE_CHAR:
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Result = file_status(file_type::character_file);
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return std::error_code();
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case FILE_TYPE_PIPE:
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Result = file_status(file_type::fifo_file);
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return std::error_code();
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}
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BY_HANDLE_FILE_INFORMATION Info;
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if (!::GetFileInformationByHandle(FileHandle, &Info))
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goto handle_status_error;
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{
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file_type Type = (Info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
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? file_type::directory_file
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: file_type::regular_file;
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Result =
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file_status(Type, Info.ftLastWriteTime.dwHighDateTime,
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Info.ftLastWriteTime.dwLowDateTime,
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Info.dwVolumeSerialNumber, Info.nFileSizeHigh,
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Info.nFileSizeLow, Info.nFileIndexHigh, Info.nFileIndexLow);
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return std::error_code();
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}
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handle_status_error:
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DWORD LastError = ::GetLastError();
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if (LastError == ERROR_FILE_NOT_FOUND ||
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LastError == ERROR_PATH_NOT_FOUND)
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Result = file_status(file_type::file_not_found);
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else if (LastError == ERROR_SHARING_VIOLATION)
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Result = file_status(file_type::type_unknown);
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else
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Result = file_status(file_type::status_error);
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return mapWindowsError(LastError);
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}
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std::error_code status(const Twine &path, file_status &result) {
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SmallString<128> path_storage;
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SmallVector<wchar_t, 128> path_utf16;
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StringRef path8 = path.toStringRef(path_storage);
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if (isReservedName(path8)) {
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result = file_status(file_type::character_file);
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return std::error_code();
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}
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if (std::error_code ec = widenPath(path8, path_utf16))
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return ec;
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DWORD attr = ::GetFileAttributesW(path_utf16.begin());
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if (attr == INVALID_FILE_ATTRIBUTES)
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return getStatus(INVALID_HANDLE_VALUE, result);
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// Handle reparse points.
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if (attr & FILE_ATTRIBUTE_REPARSE_POINT) {
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ScopedFileHandle h(
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::CreateFileW(path_utf16.begin(),
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0, // Attributes only.
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FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL,
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OPEN_EXISTING,
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FILE_FLAG_BACKUP_SEMANTICS,
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0));
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if (!h)
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return getStatus(INVALID_HANDLE_VALUE, result);
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}
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ScopedFileHandle h(
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::CreateFileW(path_utf16.begin(), 0, // Attributes only.
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FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0));
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if (!h)
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return getStatus(INVALID_HANDLE_VALUE, result);
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return getStatus(h, result);
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}
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std::error_code status(int FD, file_status &Result) {
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HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
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return getStatus(FileHandle, Result);
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}
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std::error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
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ULARGE_INTEGER UI;
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UI.QuadPart = Time.toWin32Time();
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FILETIME FT;
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FT.dwLowDateTime = UI.LowPart;
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FT.dwHighDateTime = UI.HighPart;
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HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
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if (!SetFileTime(FileHandle, NULL, &FT, &FT))
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return mapWindowsError(::GetLastError());
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return std::error_code();
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}
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std::error_code mapped_file_region::init(int FD, uint64_t Offset,
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mapmode Mode) {
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// Make sure that the requested size fits within SIZE_T.
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if (Size > std::numeric_limits<SIZE_T>::max())
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return make_error_code(errc::invalid_argument);
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HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
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if (FileHandle == INVALID_HANDLE_VALUE)
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return make_error_code(errc::bad_file_descriptor);
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DWORD flprotect;
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switch (Mode) {
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case readonly: flprotect = PAGE_READONLY; break;
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case readwrite: flprotect = PAGE_READWRITE; break;
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case priv: flprotect = PAGE_WRITECOPY; break;
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}
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HANDLE FileMappingHandle =
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::CreateFileMappingW(FileHandle, 0, flprotect,
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(Offset + Size) >> 32,
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(Offset + Size) & 0xffffffff,
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0);
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if (FileMappingHandle == NULL) {
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std::error_code ec = mapWindowsError(GetLastError());
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return ec;
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}
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DWORD dwDesiredAccess;
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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;
|
|
}
|
|
|
|
// Close all the handles except for the view. It will keep the other handles
|
|
// alive.
|
|
::CloseHandle(FileMappingHandle);
|
|
return std::error_code();
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
mapped_file_region::~mapped_file_region() {
|
|
if (Mapping)
|
|
::UnmapViewOfFile(Mapping);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
std::error_code detail::directory_iterator_construct(detail::DirIterState &it,
|
|
StringRef path){
|
|
SmallVector<wchar_t, 128> path_utf16;
|
|
|
|
if (std::error_code ec = widenPath(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 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();
|
|
}
|
|
|
|
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();
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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 (std::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 std::error_code();
|
|
}
|
|
|
|
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, 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();
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
int OpenFlags = 0;
|
|
if (Flags & F_Append)
|
|
OpenFlags |= _O_APPEND;
|
|
|
|
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);
|
|
}
|
|
|
|
ResultFD = FD;
|
|
return std::error_code();
|
|
}
|
|
} // end namespace fs
|
|
|
|
namespace path {
|
|
|
|
bool home_directory(SmallVectorImpl<char> &result) {
|
|
wchar_t Path[MAX_PATH];
|
|
if (::SHGetFolderPathW(0, CSIDL_APPDATA | CSIDL_FLAG_CREATE, 0,
|
|
/*SHGFP_TYPE_CURRENT*/0, Path) != S_OK)
|
|
return false;
|
|
|
|
if (UTF16ToUTF8(Path, ::wcslen(Path), result))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool getTempDirEnvVar(const char *Var, SmallVectorImpl<char> &Res) {
|
|
SmallVector<wchar_t, 128> NameUTF16;
|
|
if (windows::UTF8ToUTF16(Var, NameUTF16))
|
|
return false;
|
|
|
|
SmallVector<wchar_t, 1024> Buf;
|
|
size_t Size = 1024;
|
|
do {
|
|
Buf.reserve(Size);
|
|
Size =
|
|
GetEnvironmentVariableW(NameUTF16.data(), Buf.data(), Buf.capacity());
|
|
if (Size == 0)
|
|
return false;
|
|
|
|
// Try again with larger buffer.
|
|
} while (Size > Buf.capacity());
|
|
Buf.set_size(Size);
|
|
|
|
if (windows::UTF16ToUTF8(Buf.data(), Size, Res))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static bool getTempDirEnvVar(SmallVectorImpl<char> &Res) {
|
|
const char *EnvironmentVariables[] = {"TMP", "TEMP", "USERPROFILE"};
|
|
for (const char *Env : EnvironmentVariables) {
|
|
if (getTempDirEnvVar(Env, Res))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void system_temp_directory(bool ErasedOnReboot, SmallVectorImpl<char> &Result) {
|
|
(void)ErasedOnReboot;
|
|
Result.clear();
|
|
|
|
// Check whether the temporary directory is specified by an environment
|
|
// variable.
|
|
if (getTempDirEnvVar(Result))
|
|
return;
|
|
|
|
// 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);
|
|
|
|
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());
|
|
}
|
|
|
|
// Make utf16 null terminated.
|
|
utf16.push_back(0);
|
|
utf16.pop_back();
|
|
|
|
return std::error_code();
|
|
}
|
|
|
|
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);
|
|
|
|
if (len == 0)
|
|
return mapWindowsError(::GetLastError());
|
|
|
|
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
|