1 files changed, 214 insertions, 0 deletions
diff --git a/gnu/llvm/lib/Support/Windows/WindowsSupport.h b/gnu/llvm/lib/Support/Windows/WindowsSupport.h
new file mode 100644
index 00000000000..60490f26643
--- /dev/null
+++ b/gnu/llvm/lib/Support/Windows/WindowsSupport.h
@@ -0,0 +1,214 @@
+//===- WindowsSupport.h - Common Windows Include File -----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines things specific to Windows implementations.  In addition to
+// providing some helpers for working with win32 APIs, this header wraps
+// <windows.h> with some portability macros.  Always include WindowsSupport.h
+// instead of including <windows.h> directly.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic Win32 code that
+//===          is guaranteed to work on *all* Win32 variants.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_WINDOWSSUPPORT_H
+#define LLVM_SUPPORT_WINDOWSSUPPORT_H
+
+// mingw-w64 tends to define it as 0x0502 in its headers.
+#undef _WIN32_WINNT
+#undef _WIN32_IE
+
+// Require at least Windows 7 API.
+#define _WIN32_WINNT 0x0601
+#define _WIN32_IE    0x0800 // MinGW at it again. FIXME: verify if still needed.
+#define WIN32_LEAN_AND_MEAN
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Config/config.h" // Get build system configuration settings
+#include "llvm/Support/Compiler.h"
+#include <system_error>
+#include <windows.h>
+#include <wincrypt.h>
+#include <cassert>
+#include <string>
+#include <vector>
+
+/// Determines if the program is running on Windows 8 or newer. This
+/// reimplements one of the helpers in the Windows 8.1 SDK, which are intended
+/// to supercede raw calls to GetVersionEx. Old SDKs, Cygwin, and MinGW don't
+/// yet have VersionHelpers.h, so we have our own helper.
+inline bool RunningWindows8OrGreater() {
+  // Windows 8 is version 6.2, service pack 0.
+  OSVERSIONINFOEXW osvi = {};
+  osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+  osvi.dwMajorVersion = 6;
+  osvi.dwMinorVersion = 2;
+  osvi.wServicePackMajor = 0;
+
+  DWORDLONG Mask = 0;
+  Mask = VerSetConditionMask(Mask, VER_MAJORVERSION, VER_GREATER_EQUAL);
+  Mask = VerSetConditionMask(Mask, VER_MINORVERSION, VER_GREATER_EQUAL);
+  Mask = VerSetConditionMask(Mask, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);
+
+  return VerifyVersionInfoW(&osvi, VER_MAJORVERSION | VER_MINORVERSION |
+                                       VER_SERVICEPACKMAJOR,
+                            Mask) != FALSE;
+}
+
+inline bool MakeErrMsg(std::string* ErrMsg, const std::string& prefix) {
+  if (!ErrMsg)
+    return true;
+  char *buffer = NULL;
+  DWORD LastError = GetLastError();
+  DWORD R = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+                          FORMAT_MESSAGE_FROM_SYSTEM |
+                          FORMAT_MESSAGE_MAX_WIDTH_MASK,
+                          NULL, LastError, 0, (LPSTR)&buffer, 1, NULL);
+  if (R)
+    *ErrMsg = prefix + ": " + buffer;
+  else
+    *ErrMsg = prefix + ": Unknown error";
+  *ErrMsg += " (0x" + llvm::utohexstr(LastError) + ")";
+
+  LocalFree(buffer);
+  return R != 0;
+}
+
+template <typename HandleTraits>
+class ScopedHandle {
+  typedef typename HandleTraits::handle_type handle_type;
+  handle_type Handle;
+
+  ScopedHandle(const ScopedHandle &other); // = delete;
+  void operator=(const ScopedHandle &other); // = delete;
+public:
+  ScopedHandle()
+    : Handle(HandleTraits::GetInvalid()) {}
+
+  explicit ScopedHandle(handle_type h)
+    : Handle(h) {}
+
+  ~ScopedHandle() {
+    if (HandleTraits::IsValid(Handle))
+      HandleTraits::Close(Handle);
+  }
+
+  handle_type take() {
+    handle_type t = Handle;
+    Handle = HandleTraits::GetInvalid();
+    return t;
+  }
+
+  ScopedHandle &operator=(handle_type h) {
+    if (HandleTraits::IsValid(Handle))
+      HandleTraits::Close(Handle);
+    Handle = h;
+    return *this;
+  }
+
+  // True if Handle is valid.
+  explicit operator bool() const {
+    return HandleTraits::IsValid(Handle) ? true : false;
+  }
+
+  operator handle_type() const {
+    return Handle;
+  }
+};
+
+struct CommonHandleTraits {
+  typedef HANDLE handle_type;
+
+  static handle_type GetInvalid() {
+    return INVALID_HANDLE_VALUE;
+  }
+
+  static void Close(handle_type h) {
+    ::CloseHandle(h);
+  }
+
+  static bool IsValid(handle_type h) {
+    return h != GetInvalid();
+  }
+};
+
+struct JobHandleTraits : CommonHandleTraits {
+  static handle_type GetInvalid() {
+    return NULL;
+  }
+};
+
+struct CryptContextTraits : CommonHandleTraits {
+  typedef HCRYPTPROV handle_type;
+
+  static handle_type GetInvalid() {
+    return 0;
+  }
+
+  static void Close(handle_type h) {
+    ::CryptReleaseContext(h, 0);
+  }
+
+  static bool IsValid(handle_type h) {
+    return h != GetInvalid();
+  }
+};
+
+struct FindHandleTraits : CommonHandleTraits {
+  static void Close(handle_type h) {
+    ::FindClose(h);
+  }
+};
+
+struct FileHandleTraits : CommonHandleTraits {};
+
+typedef ScopedHandle<CommonHandleTraits> ScopedCommonHandle;
+typedef ScopedHandle<FileHandleTraits>   ScopedFileHandle;
+typedef ScopedHandle<CryptContextTraits> ScopedCryptContext;
+typedef ScopedHandle<FindHandleTraits>   ScopedFindHandle;
+typedef ScopedHandle<JobHandleTraits>    ScopedJobHandle;
+
+namespace llvm {
+template <class T>
+class SmallVectorImpl;
+
+template <class T>
+typename SmallVectorImpl<T>::const_pointer
+c_str(SmallVectorImpl<T> &str) {
+  str.push_back(0);
+  str.pop_back();
+  return str.data();
+}
+
+namespace sys {
+namespace path {
+std::error_code widenPath(const Twine &Path8,
+                          SmallVectorImpl<wchar_t> &Path16);
+} // end namespace path
+
+namespace windows {
+std::error_code UTF8ToUTF16(StringRef utf8, SmallVectorImpl<wchar_t> &utf16);
+std::error_code UTF16ToUTF8(const wchar_t *utf16, size_t utf16_len,
+                            SmallVectorImpl<char> &utf8);
+/// Convert from UTF16 to the current code page used in the system
+std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len,
+                             SmallVectorImpl<char> &utf8);
+} // end namespace windows
+} // end namespace sys
+} // end namespace llvm.
+
+#endif