tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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file_version_info_win.cpp (2963B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=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 http://mozilla.org/MPL/2.0/. */
      6 
      7 // This is a partial implementation of Chromium's source file
      8 // base/file_version_info_win.cc
      9 
     10 #include "base/file_version_info_win.h"
     11 
     12 #include <windows.h>
     13 
     14 #include "base/files/file_path.h"
     15 #include "base/memory/ptr_util.h"
     16 #include "base/threading/scoped_blocking_call.h"
     17 
     18 
     19 namespace {
     20 
     21 struct LanguageAndCodePage {
     22  WORD language;
     23  WORD code_page;
     24 };
     25 
     26 // Returns the \VarFileInfo\Translation value extracted from the
     27 // VS_VERSION_INFO resource in |data|.
     28 LanguageAndCodePage* GetTranslate(const void* data) {
     29  static constexpr wchar_t kTranslation[] = L"\\VarFileInfo\\Translation";
     30  LPVOID translate = nullptr;
     31  UINT dummy_size;
     32  if (::VerQueryValue(data, kTranslation, &translate, &dummy_size))
     33    return static_cast<LanguageAndCodePage*>(translate);
     34  return nullptr;
     35 }
     36 
     37 const VS_FIXEDFILEINFO& GetVsFixedFileInfo(const void* data) {
     38  static constexpr wchar_t kRoot[] = L"\\";
     39  LPVOID fixed_file_info = nullptr;
     40  UINT dummy_size;
     41  CHECK(::VerQueryValue(data, kRoot, &fixed_file_info, &dummy_size));
     42  return *static_cast<VS_FIXEDFILEINFO*>(fixed_file_info);
     43 }
     44 
     45 }  // namespace
     46 
     47 // static
     48 std::unique_ptr<FileVersionInfoWin>
     49 FileVersionInfoWin::CreateFileVersionInfoWin(const base::FilePath& file_path) {
     50  base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
     51                                                base::BlockingType::MAY_BLOCK);
     52 
     53  DWORD dummy;
     54  const wchar_t* path = file_path.value().c_str();
     55  const DWORD length = ::GetFileVersionInfoSize(path, &dummy);
     56  if (length == 0)
     57    return nullptr;
     58 
     59  std::vector<uint8_t> data(length, 0);
     60 
     61  if (!::GetFileVersionInfo(path, dummy, length, data.data()))
     62    return nullptr;
     63 
     64  const LanguageAndCodePage* translate = GetTranslate(data.data());
     65  if (!translate)
     66    return nullptr;
     67 
     68  return base::WrapUnique(new FileVersionInfoWin(
     69      std::move(data), translate->language, translate->code_page));
     70 }
     71 
     72 base::Version FileVersionInfoWin::GetFileVersion() const {
     73  return base::Version({HIWORD(fixed_file_info_.dwFileVersionMS),
     74                        LOWORD(fixed_file_info_.dwFileVersionMS),
     75                        HIWORD(fixed_file_info_.dwFileVersionLS),
     76                        LOWORD(fixed_file_info_.dwFileVersionLS)});
     77 }
     78 
     79 FileVersionInfoWin::FileVersionInfoWin(std::vector<uint8_t>&& data,
     80                                       WORD language,
     81                                       WORD code_page)
     82    : owned_data_(std::move(data)),
     83      data_(owned_data_.data()),
     84      language_(language),
     85      code_page_(code_page),
     86      fixed_file_info_(GetVsFixedFileInfo(data_)) {
     87  DCHECK(!owned_data_.empty());
     88 
     89  (void)language_;
     90  (void)code_page_;
     91 }