File: win_util.cc

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/win_util.h"

#include <map>
#include <sddl.h>

#include "base/logging.h"
#include "base/singleton.h"
#include "base/string_util.h"

namespace win_util {

std::wstring FormatMessage(unsigned messageid) {
  wchar_t* string_buffer = NULL;
  unsigned string_length = ::FormatMessage(
      FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
      FORMAT_MESSAGE_IGNORE_INSERTS, NULL, messageid, 0,
      reinterpret_cast<wchar_t *>(&string_buffer), 0, NULL);

  std::wstring formatted_string;
  if (string_buffer) {
    formatted_string = string_buffer;
    LocalFree(reinterpret_cast<HLOCAL>(string_buffer));
  } else {
    // The formating failed. simply convert the message value into a string.
    SStringPrintf(&formatted_string, L"message number %d", messageid);
  }
  return formatted_string;
}

std::wstring FormatLastWin32Error() {
  return FormatMessage(GetLastError());
}

}  // namespace win_util