Source code
Revision control
Copy as Markdown
Other Tools
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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
// This is a partial implementation of Chromium's source file
// base/file_version_info_win.cc
#include "base/file_version_info_win.h"
#include "base/files/file_path.h"
#include "base/memory/ptr_util.h"
#include "base/threading/scoped_blocking_call.h"
#include "mozilla/Unused.h"
namespace {
struct LanguageAndCodePage {
WORD language;
WORD code_page;
};
// Returns the \VarFileInfo\Translation value extracted from the
// VS_VERSION_INFO resource in |data|.
LanguageAndCodePage* GetTranslate(const void* data) {
static constexpr wchar_t kTranslation[] = L"\\VarFileInfo\\Translation";
LPVOID translate = nullptr;
UINT dummy_size;
if (::VerQueryValue(data, kTranslation, &translate, &dummy_size))
return static_cast<LanguageAndCodePage*>(translate);
return nullptr;
}
const VS_FIXEDFILEINFO& GetVsFixedFileInfo(const void* data) {
static constexpr wchar_t kRoot[] = L"\\";
LPVOID fixed_file_info = nullptr;
UINT dummy_size;
CHECK(::VerQueryValue(data, kRoot, &fixed_file_info, &dummy_size));
return *static_cast<VS_FIXEDFILEINFO*>(fixed_file_info);
}
} // namespace
// static
std::unique_ptr<FileVersionInfoWin>
FileVersionInfoWin::CreateFileVersionInfoWin(const base::FilePath& file_path) {
base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
base::BlockingType::MAY_BLOCK);
DWORD dummy;
const wchar_t* path = file_path.value().c_str();
const DWORD length = ::GetFileVersionInfoSize(path, &dummy);
if (length == 0)
return nullptr;
std::vector<uint8_t> data(length, 0);
if (!::GetFileVersionInfo(path, dummy, length, data.data()))
return nullptr;
const LanguageAndCodePage* translate = GetTranslate(data.data());
if (!translate)
return nullptr;
return base::WrapUnique(new FileVersionInfoWin(
std::move(data), translate->language, translate->code_page));
}
base::Version FileVersionInfoWin::GetFileVersion() const {
return base::Version({HIWORD(fixed_file_info_.dwFileVersionMS),
LOWORD(fixed_file_info_.dwFileVersionMS),
HIWORD(fixed_file_info_.dwFileVersionLS),
LOWORD(fixed_file_info_.dwFileVersionLS)});
}
FileVersionInfoWin::FileVersionInfoWin(std::vector<uint8_t>&& data,
WORD language,
WORD code_page)
: owned_data_(std::move(data)),
data_(owned_data_.data()),
language_(language),
code_page_(code_page),
fixed_file_info_(GetVsFixedFileInfo(data_)) {
DCHECK(!owned_data_.empty());
mozilla::Unused << language_;
mozilla::Unused << code_page_;
}