toolkit/xre/dllservices/ModuleVersionInfo.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_ModuleVersionInfo_h
   8 #define mozilla_ModuleVersionInfo_h
   9
  10 #include <windows.h>
  11 #include "nsString.h"
  12
  13 namespace mozilla {
  14
  15 // Obtains basic version info from a module image's version info resource.
  16 class ModuleVersionInfo {
  17  public:
  18   // We favor English(US) for these fields, otherwise we take the first
  19   // translation provided in the version resource.
  20   nsString mCompanyName;
  21   nsString mProductName;
  22   nsString mLegalCopyright;
  23   nsString mFileDescription;
  24
  25   // Represents an A.B.C.D style version number, internally stored as a uint64_t
  26   class VersionNumber {
  27     uint64_t mVersion64 = 0;
  28
  29    public:
  30     VersionNumber() = default;
  31
  32     VersionNumber(DWORD aMostSig, DWORD aLeastSig)
  33         : mVersion64((uint64_t)aMostSig << 32 | aLeastSig) {}
  34
  35     uint16_t A() const {
  36       return (uint16_t)((mVersion64 & 0xffff000000000000) >> 48);
  37     }
  38
  39     uint16_t B() const {
  40       return (uint16_t)((mVersion64 & 0x0000ffff00000000) >> 32);
  41     }
  42
  43     uint16_t C() const {
  44       return (uint16_t)((mVersion64 & 0x00000000ffff0000) >> 16);
  45     }
  46
  47     uint16_t D() const { return (uint16_t)(mVersion64 & 0x000000000000ffff); }
  48
  49     uint64_t Version64() const { return mVersion64; }
  50
  51     bool operator==(const VersionNumber& aOther) const {
  52       return mVersion64 == aOther.mVersion64;
  53     }
  54
  55     nsCString ToString() const {
  56       nsCString ret;
  57       ret.AppendPrintf("%d.%d.%d.%d", (int)A(), (int)B(), (int)C(), (int)D());
  58       return ret;
  59     }
  60   };
  61
  62   VersionNumber mFileVersion;
  63   VersionNumber mProductVersion;
  64
  65   // Returns false if it has no version resource or has no fixed version info.
  66   bool GetFromImage(const nsAString& aPath);
  67 };
  68
  69 }  // namespace mozilla
  70
  71 #endif  // mozilla_ModuleVersionInfo_h