/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_WindowsVersion_h

#define mozilla_WindowsVersion_h

#include "mozilla/Atomics.h"

#include "mozilla/Attributes.h"

#include <stdint.h>

#include <windows.h>

namespace mozilla {

inline bool IsWindowsVersionOrLater(uint32_t aVersion) {

  static Atomic<uint32_t> minVersion(0);

  static Atomic<uint32_t> maxVersion(UINT32_MAX);

  if (minVersion >= aVersion) {

    return true;

  }

  if (aVersion >= maxVersion) {

    return false;

  }

  OSVERSIONINFOEX info;

  ZeroMemory(&info, sizeof(OSVERSIONINFOEX));

  info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);

  info.dwMajorVersion = aVersion >> 24;

  info.dwMinorVersion = (aVersion >> 16) & 0xFF;

  info.wServicePackMajor = (aVersion >> 8) & 0xFF;

  info.wServicePackMinor = aVersion & 0xFF;

  DWORDLONG conditionMask = 0;

  VER_SET_CONDITION(conditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL);

  VER_SET_CONDITION(conditionMask, VER_MINORVERSION, VER_GREATER_EQUAL);

  VER_SET_CONDITION(conditionMask, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);

  VER_SET_CONDITION(conditionMask, VER_SERVICEPACKMINOR, VER_GREATER_EQUAL);

  if (VerifyVersionInfo(&info,

                        VER_MAJORVERSION | VER_MINORVERSION |

                            VER_SERVICEPACKMAJOR | VER_SERVICEPACKMINOR,

                        conditionMask)) {

    minVersion = aVersion;

    return true;

  }

  maxVersion = aVersion;

  return false;

}

inline bool IsWindowsBuildOrLater(uint32_t aBuild) {

  static Atomic<uint32_t> minBuild(0);

  static Atomic<uint32_t> maxBuild(UINT32_MAX);

  if (minBuild >= aBuild) {

    return true;

  }

  if (aBuild >= maxBuild) {

    return false;

  }

  OSVERSIONINFOEX info;

  ZeroMemory(&info, sizeof(OSVERSIONINFOEX));

  info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);

  info.dwBuildNumber = aBuild;

  DWORDLONG conditionMask = 0;

  VER_SET_CONDITION(conditionMask, VER_BUILDNUMBER, VER_GREATER_EQUAL);

  if (VerifyVersionInfo(&info, VER_BUILDNUMBER, conditionMask)) {

    minBuild = aBuild;

    return true;

  }

  maxBuild = aBuild;

  return false;

}

inline bool IsWindows10BuildOrLater(uint32_t aBuild) {

  static Atomic<uint32_t> minBuild(0);

  static Atomic<uint32_t> maxBuild(UINT32_MAX);

  if (minBuild >= aBuild) {

    return true;

  }

  if (aBuild >= maxBuild) {

    return false;

  }

  OSVERSIONINFOEX info;

  ZeroMemory(&info, sizeof(OSVERSIONINFOEX));

  info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);

  info.dwMajorVersion = 10;

  info.dwBuildNumber = aBuild;

  DWORDLONG conditionMask = 0;

  VER_SET_CONDITION(conditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL);

  VER_SET_CONDITION(conditionMask, VER_MINORVERSION, VER_GREATER_EQUAL);

  VER_SET_CONDITION(conditionMask, VER_BUILDNUMBER, VER_GREATER_EQUAL);

  VER_SET_CONDITION(conditionMask, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);

  VER_SET_CONDITION(conditionMask, VER_SERVICEPACKMINOR, VER_GREATER_EQUAL);

  if (VerifyVersionInfo(&info,

                        VER_MAJORVERSION | VER_MINORVERSION | VER_BUILDNUMBER |

                            VER_SERVICEPACKMAJOR | VER_SERVICEPACKMINOR,

                        conditionMask)) {

    minBuild = aBuild;

    return true;

  }

  maxBuild = aBuild;

  return false;

}

MOZ_ALWAYS_INLINE bool IsWin7SP1OrLater() {

  return IsWindowsVersionOrLater(0x06010100ul);

}

MOZ_ALWAYS_INLINE bool IsWin8OrLater() {

  return IsWindowsVersionOrLater(0x06020000ul);

}

MOZ_ALWAYS_INLINE bool IsWin8Point1OrLater() {

  return IsWindowsVersionOrLater(0x06030000ul);

}

MOZ_ALWAYS_INLINE bool IsWin10OrLater() {

  return IsWindowsVersionOrLater(0x0a000000ul);

}

MOZ_ALWAYS_INLINE bool IsWin10CreatorsUpdateOrLater() {

  return IsWindows10BuildOrLater(15063);

}

MOZ_ALWAYS_INLINE bool IsNotWin7PreRTM() {

  return IsWin7SP1OrLater() || IsWindowsBuildOrLater(7600);

}

inline bool IsWin7AndPre2000Compatible() {

  /*

   * See Bug 1279171.

   * We'd like to avoid using WMF on specific OS version when compatibility

   * mode is in effect. The purpose of this function is to check if FF runs on

   * Win7 OS with application compatibility mode being set to 95/98/ME.

   * Those compatibility mode options (95/98/ME) can only display and

   * be selected for 32-bit application.

   * If the compatibility mode is in effect, the GetVersionEx function will

   * report the OS as it identifies itself, which may not be the OS that is

   * installed.

   * Note : 1) We only target for Win7 build number greater than 7600.

   *        2) GetVersionEx may be altered or unavailable for release after

   *           Win8.1. Set pragma to avoid build warning as error.

   */

  bool isWin7 = IsNotWin7PreRTM() && !IsWin8OrLater();

  if (!isWin7) {

    return false;

  }

  OSVERSIONINFOEX info;

  ZeroMemory(&info, sizeof(OSVERSIONINFOEX));

  info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);

#pragma warning(push)

#pragma warning(disable : 4996)

  bool success = GetVersionEx((LPOSVERSIONINFO)&info;;

#pragma warning(pop)

  if (!success) {

    return false;

  }

  return info.dwMajorVersion < 5;

}

}  // namespace mozilla

#endif /* mozilla_WindowsVersion_h */